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MobileGL/MobileGL/MG_Impl/GLImpl/Program/GL_Program.cpp
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// MobileGL - MobileGL/MG_Impl/GLImpl/Program/GL_Program.cpp
// Copyright (c) 2025-2026 MobileGL-Dev
// Licensed under the GNU Lesser General Public License v3.0:
// https://www.gnu.org/licenses/gpl-3.0.txt
// https://www.gnu.org/licenses/lgpl-3.0.txt
// SPDX-License-Identifier: LGPL-3.0-only
// End of Source File Header
#include "GL_Program.h"
#include "ProgramInterface.h"
#include "Config.h"
#include <cmath>
#include <limits>
#include <MG_Impl/GLImpl/VertexArray/Validators.h>
#include <MG_State/GLState/Core.h>
#include <MG_Util/Converters/GLToStr/GLEnumConverter.h>
#include <MG_Util/Converters/GLToMG/ProgramEnumConverter.h>
#include <MG_Util/Converters/MGToGL/ProgramEnumConverter.h>
#include <MG_Util/Converters/SPIRVCrossToGL/SpvcTypeConverter.h>
#include <MG_Util/Async/ShaderCompilePool.h>
#include <MG_Backend/BackendObjects.h>
namespace MobileGL::MG_Impl::GLImpl {
static GLint BoolToGLInt(bool value) {
return value ? GL_TRUE : GL_FALSE;
}
static bool CheckShaderNameValidity(Uint shader) {
if (shader == 0 || !MG_State::pGLContext->ValidateShaderName(shader)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(shader) + " is not a valid name."));
return false;
}
return true;
}
static const SharedPtr<MG_State::GLState::ShaderObject>& TryToGetShaderObject(Uint shader) {
static const SharedPtr<MG_State::GLState::ShaderObject> nullShaderObject = nullptr;
if (!CheckShaderNameValidity(shader)) return nullShaderObject;
auto& shaderObject = MG_State::pGLContext->GetShaderObject(shader);
if (!shaderObject) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(shader) + " is not a shader object."));
return nullShaderObject;
}
return shaderObject;
}
static bool CheckProgramNameValidity(GLuint program) {
if (!MG_State::pGLContext->ValidateProgramName(program)) {
// Programs and shaders share one name space: a name that exists but
// belongs to a shader is INVALID_OPERATION, a name GL never handed
// out is INVALID_VALUE (GL 3.3 core 2.11.x).
const ErrorCode error = MG_State::pGLContext->ValidateShaderName(program)
? ErrorCode::InvalidOperation
: ErrorCode::InvalidValue;
MG_State::pGLContext->RecordError(
error,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) +
(error == ErrorCode::InvalidOperation ? " is not a program object."
: " is not a valid name.")));
return false;
}
return true;
}
static const SharedPtr<MG_State::GLState::ProgramObject>& TryToGetProgramObject(GLuint program) {
static const SharedPtr<MG_State::GLState::ProgramObject> nullProgramObject = nullptr;
if (!CheckProgramNameValidity(program)) return nullProgramObject;
auto& programObject = MG_State::pGLContext->GetProgramObject(program);
if (!programObject) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) + " is not a program object."));
return nullProgramObject;
}
return programObject;
}
static const SharedPtr<MG_State::GLState::ProgramObject>& TryToGetLinkedProgramForInterfaceQuery(GLuint program,
const char* caller) {
static const SharedPtr<MG_State::GLState::ProgramObject> nullProgramObject = nullptr;
if (!MG_State::pGLContext->ValidateProgramName(program)) {
const ErrorCode error = MG_State::pGLContext->ValidateShaderName(program)
? ErrorCode::InvalidOperation
: ErrorCode::InvalidValue;
MG_State::pGLContext->RecordError(
error,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
std::to_string(program) + " is not a linked program object."));
return nullProgramObject;
}
auto& programObject = MG_State::pGLContext->GetProgramObject(program);
if (!programObject || !programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
std::to_string(program) + " is not a linked program object."));
return nullProgramObject;
}
return programObject;
}
// The four non-location interface queries validate the NAME only: GL 4.6 imposes the
// successful-link requirement on GetProgramResourceLocation/LocationIndex alone, and
// requires the others to report a program that has never linked as one with zero active
// resources. Being stricter leaves a stray GL_INVALID_OPERATION behind that aborts the
// caller's next subcase.
static const SharedPtr<MG_State::GLState::ProgramObject>& TryToGetProgramForInterfaceQuery(GLuint program,
const char* caller) {
static const SharedPtr<MG_State::GLState::ProgramObject> nullProgramObject = nullptr;
if (!MG_State::pGLContext->ValidateProgramName(program)) {
const ErrorCode error = MG_State::pGLContext->ValidateShaderName(program)
? ErrorCode::InvalidOperation
: ErrorCode::InvalidValue;
MG_State::pGLContext->RecordError(
error,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
std::to_string(program) + " is not a program object."));
return nullProgramObject;
}
auto& programObject = MG_State::pGLContext->GetProgramObject(program);
if (!programObject) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
std::to_string(program) + " is not a program object."));
return nullProgramObject;
}
return programObject;
}
static bool IsProgramInterfaceEnum(GLenum programInterface) {
return ProgramInterface::IsInterfaceEnum(programInterface);
}
static bool IsSubroutineUniformInterface(GLenum programInterface) {
switch (programInterface) {
case GL_VERTEX_SUBROUTINE_UNIFORM:
case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
case GL_GEOMETRY_SUBROUTINE_UNIFORM:
case GL_FRAGMENT_SUBROUTINE_UNIFORM:
case GL_COMPUTE_SUBROUTINE_UNIFORM:
return true;
default:
return false;
}
}
static bool ValidateProgramInterfaceivQuery(GLenum programInterface, GLenum pname) {
bool valid = IsProgramInterfaceEnum(programInterface);
switch (pname) {
case GL_ACTIVE_RESOURCES:
break;
case GL_MAX_NAME_LENGTH:
// Neither buffer interface has resource names. GL_TRANSFORM_FEEDBACK_BUFFER only
// became reachable here when IsInterfaceEnum grew the GL 4.4 interfaces, so it
// needs the same exclusion GL_ATOMIC_COUNTER_BUFFER already had.
valid = valid && programInterface != GL_ATOMIC_COUNTER_BUFFER &&
programInterface != GL_TRANSFORM_FEEDBACK_BUFFER;
break;
case GL_MAX_NUM_ACTIVE_VARIABLES:
valid = programInterface == GL_UNIFORM_BLOCK || programInterface == GL_ATOMIC_COUNTER_BUFFER ||
programInterface == GL_SHADER_STORAGE_BLOCK ||
programInterface == GL_TRANSFORM_FEEDBACK_BUFFER;
break;
case GL_MAX_NUM_COMPATIBLE_SUBROUTINES:
valid = IsSubroutineUniformInterface(programInterface);
break;
default:
valid = false;
break;
}
if (!valid) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"Unsupported program interface query."));
}
return valid;
}
static bool ValidateNamedProgramResourceInterface(GLenum programInterface, const char* caller) {
if (!ProgramInterface::IsNamedInterface(programInterface)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
"Unsupported named program resource interface."));
return false;
}
return true;
}
void CopyStr(GLsizei bufSize, GLsizei* length, GLchar* dst, const char* src, GLsizei srcLength) {
if (bufSize <= 0) {
if (length) *length = 0;
return;
}
auto sz = std::min(bufSize - 1, srcLength);
Memcpy(dst, src, sz);
dst[sz] = '\0';
if (length) *length = sz;
}
bool RecordInvalidUniformLocationError(const char* functionName, GLint location, const String& targetDescription) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", functionName,
"location " + std::to_string(location) +
" does not correspond to a valid uniform variable location for " +
targetDescription + "."));
return false;
}
GLint GetOpaqueUniformUnitLimit(const glslang::TType* type) {
const auto& dynamicParameters = MG_Backend::pActiveBackendObject->GetDynamicParameters();
if (type && type->isImage()) return dynamicParameters.MaxImageUnits;
if (type && type->isTexture()) return dynamicParameters.MaxCombinedTextureImageUnits;
return 0;
}
bool ValidateOpaqueUniformUnit(const char* functionName, const glslang::TType* type, GLint unit) {
const GLint limit = GetOpaqueUniformUnitLimit(type);
if (unit < 0 || unit >= limit) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", functionName,
"Opaque uniform unit is out of range."));
return false;
}
return true;
}
bool ValidateShaderStorageBlockBinding(GLuint binding) {
SizeT maxBindingCount = MG_State::pGLContext->GetBufferBindingPointCount(BufferTarget::ShaderStorage);
if (MG_Backend::pActiveBackendObject) {
const Int backendCount =
MG_Backend::pActiveBackendObject->GetDynamicParameters().MaxShaderStorageBufferBindings;
maxBindingCount = std::min(maxBindingCount, static_cast<SizeT>(std::max(backendCount, 0)));
}
if (binding < maxBindingCount) {
return true;
}
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"Shader storage block binding is out of range."));
return false;
}
void AttachShader_State(GLuint program, GLuint shader) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
auto& shaderObject = TryToGetShaderObject(shader);
if (!shaderObject) return;
if (!programObject->AttachShader(shaderObject)) {
MG_State::pGLContext->RecordError(ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(shader) +
" is already attached to " +
std::to_string(program) + "."));
return;
}
}
void BindAttribLocation_State(GLuint program, GLuint index, const GLchar* name) {
if (index >= VertexArrayImpl::GetMaxVertexAttribs()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"index " + std::to_string(index) +
" is greater than or equal to `GL_MAX_VERTEX_ATTRIBS`."));
return;
}
if (strncmp(name, "gl_", 3) == 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"name " + std::string(name) + " starts with the reserved prefix `gl_`."));
return;
}
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
MGLOG_D("%s: loc %02d = \"%s\"", __func__, index, name);
programObject->SetExplicitVertexInLocation(index, name);
}
void CompileShader_State(GLuint shader) {
auto& shaderObject = TryToGetShaderObject(shader);
if (!shaderObject) return;
shaderObject->Compile();
}
// glMaxShaderCompilerThreadsKHR / glMaxShaderCompilerThreadsARB - one implementation,
// because GL_KHR_parallel_shader_compile and GL_ARB_parallel_shader_compile define the
// same entry point with the same semantics and GetProcAddress.cpp maps both spellings.
//
// The three cases the extension defines, and what each means here:
//
// count == 0 "no compiler threads": compilation must happen on the
// application's thread. Everything already in flight is joined
// first, so that after this call returns NOTHING is outstanding
// and every GL_COMPLETION_STATUS_KHR reads GL_TRUE - which is
// the observable the extension actually specifies. The pool
// keeps its worker threads (this is not teardown); what changes
// is that AsyncShaderCompileActive() now says no, so
// glCompileShader/glLinkProgram run their bodies inline.
// count == 0xFFFFFFFF "implementation maximum": the pool's full thread count.
// otherwise a concurrency budget, clamped to the thread count - asking for
// more threads than exist cannot conjure any.
//
// A nonzero count is also what LIFTS a previous zero: the suspension lasts exactly until
// the application asks for threads again, and nothing else re-arms it (no implicit
// restore at eglInitialize, at a context switch or at a join). An application that turned
// compiler threads off keeps them off until it says otherwise.
//
// Legal - and a no-op beyond bookkeeping - while MOBILEGL_ASYNC_SHADER_COMPILE is off:
// compilation is already inline, and the call must not fail just because MobileGL had
// nothing to suspend.
void MaxShaderCompilerThreadsKHR_State(GLuint count) {
namespace Async = MG_Util::Async;
if (count == 0) {
MGLOG_D("%s: count = 0; joining all pending shader work and compiling inline", __func__);
Async::SetAsyncShaderCompileSuspended(true);
// Suspend BEFORE joining, not after. The post-condition this call owes the
// application is "nothing is in flight when I return", and only this order
// guarantees it: with the latch already set, anything the join itself causes to
// be compiled runs inline and is therefore already settled when the join ends.
// Joining first would leave a window in which a fresh enqueue is still legal.
if (MG_State::pGLContext) MG_State::pGLContext->JoinAllPendingShaderWork();
return;
}
Async::ShaderCompilePool& pool = Async::ShaderCompilePool::Get();
const Uint threadCount = pool.GetThreadCount();
const Uint requested = count == 0xFFFFFFFFu ? threadCount : std::min<Uint>(count, threadCount);
pool.SetMaxConcurrency(requested);
Async::SetAsyncShaderCompileSuspended(false);
MGLOG_D("%s: count = %u; concurrency = %u of %u threads", __func__, count, requested, threadCount);
}
GLuint CreateProgram_State() {
return MG_State::pGLContext->CreateProgram();
}
GLuint CreateShader_State(GLenum type) {
// GL 4.6 core 7.1: shaderType is an enum, so an unrecognised one is INVALID_ENUM (it
// used to be documented as INVALID_VALUE). The check has to happen HERE: the state
// layer hands out a name for ShaderStage::Unknown just as happily as for a real
// stage, so the old "shaderId == 0 means bad type" test could never fire and an
// unknown shaderType silently produced a usable shader name and no error at all.
const ShaderStage stage = MG_Util::ConvertGLEnumToShaderStage(type);
if (stage == ShaderStage::Unknown) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "`shaderType` is not an accepted value."));
return 0;
}
return MG_State::pGLContext->CreateShader(stage);
}
void DeleteProgram_State(GLuint program) {
// "If program is zero, it is silently ignored" (GL 4.6 core 7.3) - unlike every
// other program entry point, where 0 is a name GL never handed out.
if (program == 0) return;
if (!CheckProgramNameValidity(program)) return;
MG_State::pGLContext->MarkProgramForDeletion(program);
}
void DeleteShader_State(GLuint shader) {
// Same silent-zero rule as glDeleteProgram (GL 4.6 core 7.1).
if (shader == 0) return;
if (!CheckShaderNameValidity(shader)) return;
MG_State::pGLContext->MarkShaderForDeletion(shader);
}
void DetachShader_State(GLuint program, GLuint shader) {
auto& shaderObject = TryToGetShaderObject(shader);
if (!shaderObject) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
auto count = programObject->DetachShader(shaderObject);
if (count <= 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "Shader is not attached to program."));
return;
}
// A shader flagged with glDeleteShader lives on while attached; this detach may
// have been its last GL-visible attachment.
MG_State::pGLContext->ReleaseShaderNameIfOrphaned(shader);
}
void GetActiveAttrib_State(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLint* size,
GLenum* type, GLchar* name) {
if (bufSize < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"bufSize " + std::to_string(bufSize) + " is less than 0."));
return;
}
auto& programObject = TryToGetProgramObject(program);
if (!programObject || !programObject->GetLinkStatus()) return;
auto attribCount = programObject->GetActiveAttributesCount();
if (index >= attribCount) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"index " + std::to_string(index) +
" is greater than or equal to the number of active attribute variables in " +
std::to_string(program) + "."));
return;
}
if (size != nullptr) *size = programObject->GetActiveAttribArraySize(index);
if (type != nullptr) *type = programObject->GetActiveAttribType(index);
if (bufSize == 0) return;
auto& attribName = programObject->GetActiveAttribName(index);
CopyStr(bufSize, length, name, attribName.c_str(), (GLsizei)attribName.length());
}
void GetActiveUniform_State(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLint* size,
GLenum* type, GLchar* name) {
if (bufSize < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"bufSize " + std::to_string(bufSize) + " is less than 0."));
return;
}
auto& programObject = TryToGetProgramObject(program);
if (!programObject || !programObject->GetLinkStatus()) return;
auto uniformCount = programObject->GetUniformCount();
if (index >= uniformCount) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"index " + std::to_string(index) +
" is greater than or equal to the number of active uniform variables in " +
std::to_string(program) + "."));
return;
}
if (size != nullptr) *size = programObject->GetActiveUniformArraySize(index);
if (type != nullptr) *type = programObject->GetActiveUniformType(index);
if (bufSize == 0) return;
auto& uniformName = programObject->GetActiveUniformName(index);
CopyStr(bufSize, length, name, uniformName.c_str(), (GLsizei)uniformName.length());
}
void GetUniformIndices_State(GLuint program, GLsizei uniformCount, const GLchar* const* uniformNames,
GLuint* uniformIndices) {
if (uniformCount < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"uniformCount " + std::to_string(uniformCount) + " is less than 0."));
return;
}
auto& programObject = TryToGetProgramObject(program);
if (!programObject || !programObject->GetLinkStatus()) return;
if (uniformCount == 0 || uniformNames == nullptr || uniformIndices == nullptr) return;
for (GLsizei i = 0; i < uniformCount; ++i) {
const char* uniformName = uniformNames[i];
if (uniformName == nullptr) {
uniformIndices[i] = GL_INVALID_INDEX;
continue;
}
const Int uniformIndex = programObject->GetActiveUniformIndex(uniformName);
uniformIndices[i] = uniformIndex >= 0 ? static_cast<GLuint>(uniformIndex) : GL_INVALID_INDEX;
}
}
void GetActiveUniformsiv_State(GLuint program, GLsizei uniformCount, const GLuint* uniformIndices, GLenum pname,
GLint* params) {
if (uniformCount < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"uniformCount " + std::to_string(uniformCount) + " is less than 0."));
return;
}
// Program-name resolution with the correct two-error split: a live shader name is
// GL_INVALID_OPERATION, a never-generated name is GL_INVALID_VALUE. glGetActiveUniformsiv has
// no "not linked" error, so unlike TryToGetLinkedProgramForInterfaceQuery there is no
// link-status check here; an unlinked program simply has zero active uniforms (handled below).
if (!MG_State::pGLContext->ValidateProgramName(program)) {
const ErrorCode error = MG_State::pGLContext->ValidateShaderName(program) ? ErrorCode::InvalidOperation
: ErrorCode::InvalidValue;
MG_State::pGLContext->RecordError(
error, MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) + " is not a program object."));
return;
}
auto& programObject = MG_State::pGLContext->GetProgramObject(program);
if (!programObject) return;
switch (pname) {
case GL_UNIFORM_TYPE:
case GL_UNIFORM_SIZE:
case GL_UNIFORM_NAME_LENGTH:
case GL_UNIFORM_BLOCK_INDEX:
case GL_UNIFORM_OFFSET:
case GL_UNIFORM_ARRAY_STRIDE:
case GL_UNIFORM_MATRIX_STRIDE:
case GL_UNIFORM_IS_ROW_MAJOR:
break;
default:
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"pname " + std::to_string(pname) + " is not an accepted value."));
return;
}
if (uniformCount == 0) return;
if (uniformIndices == nullptr || params == nullptr) return;
// Every index must be < the number of active uniforms, checked before any write so params is
// left untouched on error. GetUniformCount() is 0 for an unlinked program, which is also the
// spec-mandated GL_INVALID_VALUE path for querying an unlinked program (no separate error).
const Uint activeUniforms = programObject->GetUniformCount();
for (GLsizei i = 0; i < uniformCount; ++i) {
if (uniformIndices[i] >= activeUniforms) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"uniformIndices[" + std::to_string(i) +
"] = " + std::to_string(uniformIndices[i]) +
" is greater than or equal to the number of active uniforms."));
return;
}
}
for (GLsizei i = 0; i < uniformCount; ++i) {
const Uint idx = uniformIndices[i];
switch (pname) {
case GL_UNIFORM_TYPE:
params[i] = static_cast<GLint>(programObject->GetActiveUniformType(idx));
break;
case GL_UNIFORM_SIZE:
params[i] = programObject->GetActiveUniformArraySize(idx);
break;
case GL_UNIFORM_NAME_LENGTH:
params[i] = static_cast<GLint>(programObject->GetActiveUniformName(idx).length() + 1);
break;
case GL_UNIFORM_BLOCK_INDEX:
params[i] = programObject->GetActiveUniformBlockIndex(idx);
break;
case GL_UNIFORM_OFFSET:
params[i] = programObject->GetActiveUniformOffset(idx);
break;
case GL_UNIFORM_ARRAY_STRIDE:
params[i] = programObject->GetActiveUniformArrayStride(idx);
break;
case GL_UNIFORM_MATRIX_STRIDE:
params[i] = programObject->GetActiveUniformMatrixStride(idx);
break;
case GL_UNIFORM_IS_ROW_MAJOR:
params[i] = programObject->GetActiveUniformIsRowMajor(idx);
break;
default:
break;
}
}
}
void GetAttachedShaders_State(GLuint program, GLsizei maxCount, GLsizei* count, GLuint* shaders) {
if (maxCount < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"maxCount " + std::to_string(maxCount) + " is less than 0."));
return;
}
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
const auto& s = programObject->GetAttachedShaders();
GLsizei c = std::min((GLsizei)s.size(), maxCount);
if (count) *count = c;
for (GLsizei i = 0; i < c; ++i) {
shaders[i] = s[i]->GetExternalIndex();
}
}
GLint GetAttribLocation_State(GLuint program, const GLchar* name) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return -1;
if (strncmp(name, "gl_", 3) == 0) return -1;
if (!programObject->GetLinkStatus()) return -1;
return programObject->GetAttributeLocation(name);
}
void GetProgramiv_State(GLuint program, GLenum pname, GLint* params) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
switch (pname) {
case GL_DELETE_STATUS:
*params = programObject->GetDeleteStatus();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_LINK_STATUS:
*params = programObject->GetLinkStatus();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_VALIDATE_STATUS:
*params = programObject->GetValidateStatus();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_INFO_LOG_LENGTH: {
const auto& log = programObject->GetInfoLog();
*params = log.empty() ? 0 : static_cast<GLint>(log.length()) + 1;
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
}
case GL_ATTACHED_SHADERS: {
const auto& attachedShaders = programObject->GetAttachedShaders();
*params = (GLint)attachedShaders.size();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
}
case GL_ACTIVE_ATOMIC_COUNTER_BUFFERS:
*params = programObject->GetActiveAtomicCounterCount();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_ACTIVE_ATTRIBUTES:
*params = programObject->GetActiveAttributesCount();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH:
*params = programObject->GetActiveAttributesMaxLength() + 1;
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_ACTIVE_UNIFORMS:
*params = (GLint)programObject->GetUniformCount();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_ACTIVE_UNIFORM_MAX_LENGTH:
*params = programObject->GetUniformMaxLength() + 1;
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_ACTIVE_UNIFORM_BLOCKS: // GL >= 3.1
*params = programObject->GetActiveUniformBlocksCount();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH: // ditto.
*params = programObject->GetActiveUniformBlocksMaxNameLength() + 1;
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_TRANSFORM_FEEDBACK_VARYINGS:
*params = static_cast<GLint>(programObject->GetTransformFeedbackVaryingCount());
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
*params = static_cast<GLint>(programObject->GetTransformFeedbackBufferMode());
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH:
*params = programObject->GetTransformFeedbackVaryingMaxLength();
MGLOG_D("%s: %s = %d", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), *params);
break;
case GL_COMPUTE_WORK_GROUP_SIZE: { // GL >= 4.3
if (!programObject->GetLinkStatus() || programObject->GetShaderIndexByStage(ShaderStage::Compute) < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) +
" is not a linked program object with a compute shader."));
return;
}
params[0] = static_cast<GLint>(programObject->GetComputeLocalSize(0));
params[1] = static_cast<GLint>(programObject->GetComputeLocalSize(1));
params[2] = static_cast<GLint>(programObject->GetComputeLocalSize(2));
MGLOG_D("%s: %s = (%d, %d, %d)", __func__, MG_Util::ConvertGLEnumToString(pname).c_str(), params[0],
params[1], params[2]);
break;
}
// GL_KHR_parallel_shader_compile. THIS CASE MUST NOT JOIN - it is the one program
// query whose entire purpose is to answer without waiting, and routing it through
// any of ProgramObject's Artifacts() accessors (the join gate, invariant I5) would
// block the caller and make the extension a lie: an application polling it would
// serialize itself on the very link it is trying to overlap. IsLinkComplete() is the
// node-direct reader that exists for exactly this.
//
// No link at all reads GL_TRUE, which is what the extension requires: the query
// means "is anything still outstanding", not "has this program ever been linked".
case GL_COMPLETION_STATUS_KHR:
*params = programObject->IsLinkComplete() ? GL_TRUE : GL_FALSE;
break;
case GL_PROGRAM_BINARY_LENGTH:
// No program binary format is exposed, so a program never has a retrievable
// binary and its length is zero (ARB_get_program_binary).
*params = 0;
break;
case GL_PROGRAM_BINARY_RETRIEVABLE_HINT:
*params = programObject->GetBinaryRetrievableHint() ? GL_TRUE : GL_FALSE;
break;
case GL_PROGRAM_SEPARABLE:
*params = programObject->GetSeparable() ? GL_TRUE : GL_FALSE;
break;
case GL_GEOMETRY_VERTICES_OUT:
case GL_GEOMETRY_INPUT_TYPE:
case GL_GEOMETRY_OUTPUT_TYPE:
default:
MGLOG_D("%s: %s", __func__, MG_Util::ConvertGLEnumToString(pname).c_str());
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"pname " + std::to_string(pname) + " is not an accepted value."));
return;
}
}
void GetProgramInfoLog_State(GLuint program, GLsizei bufSize, GLsizei* length, GLchar* infoLog) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
const auto& log = programObject->GetInfoLog();
CopyStr(bufSize, length, infoLog, log.c_str(), (GLsizei)log.length());
}
// MOBILEGL_ASYNC_OPTIMISTIC_SHADER_STATUS: while the compile job is still in flight -
// and, via the latch below, for the rest of that node's life once any query was
// answered this way - GL_COMPILE_STATUS reads GL_TRUE and the info log reads empty,
// WITHOUT joining. The latch (TakeOptimisticCompileAnswer) is what makes the three
// sites tell ONE story: without it, a job settling between an application's info-log
// read and its status read would produce the torn pair "GL_FALSE with an empty log",
// and an application that aborts on that never reaches the link join that carries the
// real diagnostic. A failure hidden here still fails the program link, with the
// compile log quoted in the program info log (ProgramLinkTask::ConsumeShaders), which
// is where the serial compile-then-check applications this exists for do their error
// handling.
static Bool AnswerCompileOptimistically(const SharedPtr<MG_State::GLState::ShaderObject>& shaderObject) {
return MG_Util::Async::OptimisticShaderStatusActive() && shaderObject->TakeOptimisticCompileAnswer();
}
void GetShaderiv_State(GLuint shader, GLenum pname, GLint* params) {
auto& shaderObject = TryToGetShaderObject(shader);
if (!shaderObject) return;
switch (pname) {
case GL_SHADER_TYPE:
*params = (GLint)MG_Util::ConvertShaderStageToGLEnum(shaderObject->GetShaderStage());
break;
case GL_DELETE_STATUS:
*params = shaderObject->GetDeleteStatus();
break;
case GL_COMPILE_STATUS:
if (AnswerCompileOptimistically(shaderObject)) {
*params = GL_TRUE;
break;
}
*params = shaderObject->GetCompileStatus();
break;
case GL_INFO_LOG_LENGTH:
// Not cosmetic: LWJGL's one-argument glGetShaderInfoLog convenience overload
// sizes its buffer from this query, so a joining answer here would defeat the
// non-joining GetShaderInfoLog below.
if (AnswerCompileOptimistically(shaderObject)) {
*params = 0;
break;
}
*params = shaderObject->GetInfoLog().empty() ? 0 : (GLint)shaderObject->GetInfoLog().length() + 1;
break;
case GL_SHADER_SOURCE_LENGTH:
*params = shaderObject->GetShaderSource().empty() ? 0 : (GLint)shaderObject->GetShaderSource().length() + 1;
break;
// GL_KHR_parallel_shader_compile. THIS CASE MUST NOT JOIN - see the identical case in
// GetProgramiv_State. GL_COMPILE_STATUS two cases up deliberately DOES join (it has
// to: it reports the outcome); this one reports whether there is an outcome yet, and
// reading it through Compiled() would defeat the whole extension.
case GL_COMPLETION_STATUS_KHR:
*params = shaderObject->IsCompileComplete() ? GL_TRUE : GL_FALSE;
break;
default:
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"pname " + std::to_string(pname) + " is not an accepted value."));
return;
}
}
void GetShaderInfoLog_State(GLuint shader, GLsizei bufSize, GLsizei* length, GLchar* infoLog) {
auto& shaderObject = TryToGetShaderObject(shader);
if (!shaderObject) return;
// See AnswerCompileOptimistically: an in-flight compile reads as an empty log. The
// cost is a lost compile WARNING (a successful compile whose log the application
// reads exactly once, now, and never after the join) - accepted as part of the
// opt-in.
if (AnswerCompileOptimistically(shaderObject)) {
CopyStr(bufSize, length, infoLog, "", 0);
return;
}
const auto& log = shaderObject->GetInfoLog();
CopyStr(bufSize, length, infoLog, log.c_str(), (GLsizei)log.length());
}
void GetShaderSource_State(GLuint shader, GLsizei bufSize, GLsizei* length, GLchar* source) {
if (bufSize < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"bufSize " + std::to_string(bufSize) + " is less than 0."));
}
auto& shaderObject = TryToGetShaderObject(shader);
if (!shaderObject) return;
auto& src = shaderObject->GetShaderSource();
CopyStr(bufSize, length, source, src.c_str(), (GLsizei)src.length());
}
GLint GetUniformLocation_State(GLuint program, const GLchar* name) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return -1;
auto loc = programObject->GetUniformLocation(name);
MGLOG_D("%s: loc %02d = %s", __func__, loc, name);
return loc;
}
// A float matrix lives in the global UBO under std140 rules - one 16-byte-aligned column
// vector per column - while the value glGetUniform* must return is tightly packed
// columns * rows floats. Only mat4 is the same either way; every other shape needs the
// padding undone, and the readback has to undo exactly what UniformMatrixfv_Object put
// there. Returns false when `ttype` is not a float matrix (nothing to unpack).
Bool TryGatherFloatMatrixColumns(const glslang::TType* ttype, const char* pBase, void* params) {
if (ttype == nullptr || !ttype->isMatrix() || ttype->getBasicType() == glslang::EbtDouble) return false;
const Int columns = ttype->getMatrixCols();
const Int rows = ttype->getMatrixRows();
for (Int column = 0; column < columns; ++column) {
Memcpy(static_cast<char*>(params) + static_cast<SizeT>(column) * rows * sizeof(GLfloat),
pBase + static_cast<SizeT>(column) * 4 * sizeof(GLfloat), rows * sizeof(GLfloat));
}
return true;
}
// Bytes a uniform actually occupies in the global UBO. It is the tight GL type size for
// everything except a float matrix, whose padded columns make it wider.
SizeT UniformStorageSpanInBytes(const glslang::TType* ttype, SizeT tightSize) {
if (ttype != nullptr && ttype->isMatrix() && ttype->getBasicType() != glslang::EbtDouble) {
return static_cast<SizeT>(ttype->getMatrixCols()) * 4 * sizeof(GLfloat);
}
return tightSize;
}
void GetUniform_State(GLuint program, GLint location, void* params) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) + " has not been successfully linked."));
return;
}
// Check if location is valid
if (!programObject->IsValidUniformLocation(location)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"location " + std::to_string(location) +
" does not correspond to a valid uniform variable location for the specified program object."));
return;
}
auto isOpaque = programObject->IsUniformOpaqueAtLocation(location);
if (!isOpaque) {
// TODO: probably handle int/float differences
auto offset = programObject->GetUniformOffset(location);
auto size = programObject->GetUniformSizesInBytes(location);
char* pUBO = (char*)programObject->MapUBO();
auto* ttype = programObject->GetUniformTType(location);
const SizeT span = UniformStorageSpanInBytes(ttype, size);
if (pUBO == nullptr || offset == MG_State::GLState::ProgramObject::kInvalidUniformOffset ||
offset + span > programObject->GetUBOSize()) {
MGLOG_E("%s: uniform at program %u location %d has no backing storage; returning nothing", __func__,
program, location);
return;
}
if (!TryGatherFloatMatrixColumns(ttype, pUBO + offset, params)) {
Memcpy(params, pUBO + offset, size);
}
}
// TODO: handle 1i variant as texture unit
}
template <typename T>
void GetUniformScalar_State(GLuint program, GLint location, T* params) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) + " has not been successfully linked."));
return;
}
if (!programObject->IsValidUniformLocation(location)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"location " + std::to_string(location) +
" does not correspond to a valid uniform variable location for the specified program object."));
return;
}
if (programObject->IsUniformOpaqueAtLocation(location)) {
const Int unit = std::max(programObject->GetUniformSamplerOrImageUnitIndex(location), 0);
*params = static_cast<T>(unit);
return;
}
auto offset = programObject->GetUniformOffset(location);
auto size = programObject->GetUniformSizesInBytes(location);
char* pUBO = static_cast<char*>(programObject->MapUBO());
auto* ttype = programObject->GetUniformTType(location);
const SizeT span = UniformStorageSpanInBytes(ttype, size);
if (pUBO == nullptr || offset == MG_State::GLState::ProgramObject::kInvalidUniformOffset ||
offset + span > programObject->GetUBOSize()) {
MGLOG_E("%s: uniform at program %u location %d has no backing storage; returning nothing", __func__,
program, location);
return;
}
if constexpr (std::is_same_v<T, GLfloat>) {
if (TryGatherFloatMatrixColumns(ttype, pUBO + offset, params)) return;
}
// A double-precision uniform is the one case where the stored component type can
// differ from the queried one for a non-opaque uniform, and the difference is not
// just a reinterpretation: it is twice as wide, so a raw copy would overrun the
// caller's buffer as well as return nonsense. Read component by component and let
// GL's conversion rules (7.6: round to nearest for the integer queries) apply.
if (ttype->getBasicType() == glslang::EbtDouble) {
const Int columns = ttype->isMatrix() ? ttype->getMatrixCols() : 1;
const Int rows = ttype->isMatrix() ? ttype->getMatrixRows()
: (ttype->isVector() ? ttype->getVectorSize() : 1);
// The slot the linker handed out is exactly `columns` columns wide, so it also
// states the column stride - which for a double matrix is not a float's 16 bytes.
const SizeT columnStride = columns > 0 ? size / static_cast<SizeT>(columns) : size;
for (Int column = 0; column < columns; ++column) {
for (Int row = 0; row < rows; ++row) {
GLdouble component = 0.0;
Memcpy(&component, pUBO + offset + column * columnStride + row * sizeof(GLdouble),
sizeof(component));
if constexpr (std::is_integral_v<T>) {
// Rounded to the nearest integer and clamped into the queried type's
// range, so a negative double read through glGetUniformuiv is 0
// rather than its two's complement.
const GLdouble rounded = std::nearbyint(component);
const GLdouble lowest = static_cast<GLdouble>(std::numeric_limits<T>::lowest());
const GLdouble highest = static_cast<GLdouble>(std::numeric_limits<T>::max());
params[column * rows + row] = static_cast<T>(std::clamp(rounded, lowest, highest));
} else {
params[column * rows + row] = static_cast<T>(component);
}
}
}
return;
}
Memcpy(params, pUBO + offset, size);
}
void GetUniformdv_State(GLuint program, GLint location, GLdouble* params) {
GetUniformScalar_State(program, location, params);
}
void GetUniformfv_State(GLuint program, GLint location, GLfloat* params) {
GetUniformScalar_State(program, location, params);
}
void GetUniformiv_State(GLuint program, GLint location, GLint* params) {
GetUniformScalar_State(program, location, params);
}
void GetUniformuiv_State(GLuint program, GLint location, GLuint* params) {
GetUniformScalar_State(program, location, params);
}
GLboolean IsProgram_State(GLuint program) {
// Deletion-flagged names stay valid while the object is still GL-visible (program in
// use, shader attached), so name validity is exactly the Is* answer.
if (program == 0) return GL_FALSE;
return MG_State::pGLContext->ValidateProgramName(program) ? GL_TRUE : GL_FALSE;
}
GLboolean IsShader_State(GLuint shader) {
if (shader == 0) return GL_FALSE;
return MG_State::pGLContext->ValidateShaderName(shader) ? GL_TRUE : GL_FALSE;
}
void LinkProgram_State(GLuint program) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
MGLOG_D("%s: linking program %d", __func__, program);
// Relinking the program an active transform feedback captures from would
// invalidate its varyings mid-capture (GL 3.3 core 2.11.3).
if (MG_State::pGLContext->IsTransformFeedbackActive() &&
MG_State::pGLContext->GetTransformFeedbackProgram().get() == programObject.get()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"The program used by active transform feedback cannot be relinked."));
return;
}
static Bool allowVSOnlyPrograms;
static Bool initialized = false;
if (!initialized) {
const auto& activeBackendObject = MG_Backend::pActiveBackendObject;
if (!activeBackendObject) {
MGLOG_E("activeBackendObject is not initialized!");
return;
}
const auto& rendererInfo = activeBackendObject->GetRendererInfo();
allowVSOnlyPrograms = (Int)rendererInfo.StaticBackendCapability.AllowVSOnlyPrograms;
}
const auto& activeBackendObject = MG_Backend::pActiveBackendObject;
if (activeBackendObject) {
programObject->SetMaxFragmentOutputColorNumber(activeBackendObject->GetDynamicParameters().MaxDrawBuffers);
}
programObject->Link(!allowVSOnlyPrograms);
}
void ShaderSource_State(GLuint shader, GLsizei count, const GLchar* const* string, const GLint* length) {
if (count < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"count " + std::to_string(count) + " is less than 0."));
return;
}
auto& shaderObject = TryToGetShaderObject(shader);
if (!shaderObject) return;
std::string src;
for (GLsizei i = 0; i < count; i++) {
if (!string[i]) {
continue;
}
src += (length && length[i] >= 0) ? std::string(string[i], length[i]) : std::string(string[i]);
}
shaderObject->SetShaderSource(Move(src));
}
void UseProgram_State(GLuint program) {
MGLOG_D("UseProgram_State: program=%u", program);
// The program in use may not change while transform feedback is active - unless
// the capture is paused, which is exactly what ARB_transform_feedback2 added the
// pause for (GL 4.6 core 7.3).
if (MG_State::pGLContext->IsTransformFeedbackActive() &&
!MG_State::pGLContext->IsTransformFeedbackPaused()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"The current program cannot change while transform feedback is active."));
return;
}
if (program == 0) {
MG_State::pGLContext->UseProgram(0);
return;
}
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
MG_State::pGLContext->UseProgram(program);
}
template <GLsizei ItemCount, typename T>
void Uniform_State(MG_State::GLState::ProgramObject& programObject, GLuint location, T* value,
SizeT byteOffsetInsideUniform = 0) {
if (!programObject.IsUniformOpaqueAtLocation(location)) {
MGLOG_D("%s: program = %d, location = %d, maxLocation = %d", __func__, programObject.GetExternalIndex(),
location, programObject.GetMaxUniformLocation());
// Everything up to and including the clamp is phase-A data (the uniform's GL type
// decides its size), so it is answered without joining anything.
const SizeT size = programObject.GetUniformSizesInBytes(location);
SizeT writeSize = ItemCount * sizeof(T);
if (size < writeSize) {
// Metadata bug: degrade to a clamped copy instead of killing the process.
MGLOG_E("%s: uniform size mismatch at program %u location %u: expected at least %zu bytes, got %zu "
"bytes; clamping",
__func__, programObject.GetExternalIndex(), location, ItemCount * sizeof(T), size);
writeSize = size;
}
// The uniform shadow's LAYOUT is phase-B data, so a write that lands while the
// SPIR-V job is still running is recorded and replayed at its publish instead of
// joining it. This is the hot path for a shaderpack that sets its uniforms
// immediately after glLinkProgram. BufferUniformWrite declines (and we fall
// through, joining) only past its size budget.
if (programObject.IsSpirvPending() &&
programObject.BufferUniformWrite(location, byteOffsetInsideUniform, value, writeSize)) {
return;
}
const Uint offset = programObject.GetUniformOffset(location);
char* pUBO = static_cast<char*>(programObject.MapUBO());
const SizeT uboSize = programObject.GetUBOSize();
if (pUBO == nullptr || offset == MG_State::GLState::ProgramObject::kInvalidUniformOffset ||
offset + byteOffsetInsideUniform + writeSize > uboSize) {
// Should not happen: linking gives every settable uniform backing
// storage. Log and drop the write instead of faulting.
MGLOG_E("%s: uniform at program %u location %u has no backing storage (ubo=%p offset=%u size=%zu "
"uboSize=%zu); dropping write",
__func__, programObject.GetExternalIndex(), location, static_cast<void*>(pUBO), offset,
writeSize, uboSize);
return;
}
MGLOG_D("%s: program = %d, location = %d, byteOffset = %d", __func__, programObject.GetExternalIndex(),
location, offset + byteOffsetInsideUniform);
// Apps re-set identical uniform values constantly (Minecraft re-uploads the same
// matrices and sampler indices every frame), and any content-version move makes both
// backends re-upload the whole UBO on the next draw. Every glUniform entry point
// funnels its final bytes through here - after any transpose/stride conversion, with
// the exact destination range known - and the scratch is zero-filled at link (matching
// the GL zero defaults), so a bytes-equal write can be dropped without moving the
// version.
if (std::memcmp(pUBO + offset + byteOffsetInsideUniform, value, writeSize) == 0) return;
Memcpy(pUBO + offset + byteOffsetInsideUniform, value, writeSize);
programObject.MarkUBOContentDirty();
} else {
auto* ttype = programObject.GetUniformTType(location);
if (!ttype->isTexture() && !ttype->isImage()) return;
if constexpr (!std::is_same_v<std::remove_cv_t<T>, GLint> || ItemCount != 1) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"Opaque uniforms can only be set with Uniform1i/Uniform1iv."));
return;
}
if (!ValidateOpaqueUniformUnit(__func__, ttype, *value)) return;
MGLOG_D("%s: program = %d, opaque uniform location = %d, name = '%s', unit = %d", __func__,
programObject.GetExternalIndex(), location, programObject.GetUniformName(location).c_str(),
static_cast<Int>(*value));
programObject.SetUniformSamplerOrImageUnitIndex(location, *value);
}
}
template <GLsizei ItemCount, typename T>
void Uniformv_State(GLint location, GLsizei count, T* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
for (GLint offset = 0; offset < count; offset++) {
if (offset > 0 && !programObject->UniformLocationsAliasSameUniform(location, location + offset)) {
// GL 3.3 §2.11.4: values for elements beyond the end of the uniform
// array are ignored. Never step onto a neighboring uniform's location.
break;
}
if (!programObject->IsValidUniformLocation(location + offset)) {
RecordInvalidUniformLocationError(__func__, location + offset, "the current program object");
return;
}
Uniform_State<ItemCount>(*programObject, location + offset, value + offset * ItemCount);
}
}
template <GLsizei ItemCount, typename T>
void ProgramUniformv_State(GLuint program, GLint location, GLsizei count, T* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
for (GLint offset = 0; offset < count; offset++) {
if (offset > 0 && !programObject->UniformLocationsAliasSameUniform(location, location + offset)) {
// Values for elements beyond the end of the uniform array are ignored.
break;
}
if (!programObject->IsValidUniformLocation(location + offset)) {
RecordInvalidUniformLocationError(__func__, location + offset,
"program " + std::to_string(program));
return;
}
Uniform_State<ItemCount>(*programObject, location + offset, value + offset * ItemCount);
}
}
// glUniform*d / glUniformMatrix*dv. The vector forms need nothing beyond the shared
// upload template - it is already typed on the component - but a matrix does: the
// column stride the linker used for a double matrix is not the 16 bytes a float one
// gets. It is not guessed here; the slot the uniform was given is exactly `columns`
// columns wide, so dividing states the stride the rest of the pipeline agreed on.
template <typename Program>
void UniformMatrixdv_Object(Program& programObject, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value, Int columns, Int rows) {
const SizeT slotSize = programObject.GetUniformSizesInBytes(location);
const SizeT columnStride = columns > 0 ? slotSize / static_cast<SizeT>(columns) : slotSize;
const SizeT componentCount = static_cast<SizeT>(columns) * static_cast<SizeT>(rows);
Vector<GLdouble> column(static_cast<SizeT>(rows));
for (GLint matrix = 0; matrix < count; ++matrix) {
if (matrix > 0 && !programObject.UniformLocationsAliasSameUniform(location, location + matrix)) break;
if (!programObject.IsValidUniformLocation(location + matrix)) {
RecordInvalidUniformLocationError(__func__, location + matrix, "the current program object");
return;
}
const GLdouble* source = value + matrix * componentCount;
for (Int c = 0; c < columns; ++c) {
for (Int r = 0; r < rows; ++r) {
column[r] = transpose == GL_TRUE ? source[r * columns + c] : source[c * rows + r];
}
Uniform_State<1>(programObject, location + matrix, column.data(), c * columnStride);
for (Int r = 1; r < rows; ++r) {
Uniform_State<1>(programObject, location + matrix, column.data() + r,
c * columnStride + r * sizeof(GLdouble));
}
}
}
}
// glUniformMatrix*fv / glProgramUniformMatrix*fv, every shape (square and non-square).
// A float matrix sits in the global UBO under std140 rules: each of its `columns`
// column vectors starts on its own 16-byte boundary no matter how many rows it has, so
// the only shape that may be written as one contiguous block is mat4. Writing a matNxM
// as N*M packed floats puts every column after the first at the wrong byte offset.
template <typename Program>
void UniformMatrixfv_Object(Program& programObject, const char* caller, GLint location, GLsizei count,
GLboolean transpose, const GLfloat* value, Int columns, Int rows,
const String& ownerDescription) {
// std140: a column vector of a float matrix is padded out to a vec4.
constexpr SizeT kColumnStride = 4 * sizeof(GLfloat);
const SizeT componentCount = static_cast<SizeT>(columns) * static_cast<SizeT>(rows);
GLfloat column[4] = {};
for (GLint matrix = 0; matrix < count; ++matrix) {
if (matrix > 0 && !programObject.UniformLocationsAliasSameUniform(location, location + matrix)) {
// GL 3.3 2.11.4: values for elements beyond the end of the uniform array
// are ignored. Never step onto a neighboring uniform's location.
break;
}
if (!programObject.IsValidUniformLocation(location + matrix)) {
RecordInvalidUniformLocationError(caller, location + matrix, ownerDescription);
return;
}
if (programObject.IsUniformOpaqueAtLocation(location + matrix)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
"Opaque uniforms cannot be set with matrix Uniform calls."));
return;
}
if (value == nullptr) return;
const GLfloat* source = value + static_cast<SizeT>(matrix) * componentCount;
for (Int c = 0; c < columns; ++c) {
for (Int r = 0; r < rows; ++r) {
column[r] = transpose == GL_TRUE ? source[r * columns + c] : source[c * rows + r];
}
const SizeT byteOffset = static_cast<SizeT>(c) * kColumnStride;
switch (rows) {
case 2: Uniform_State<2>(programObject, location + matrix, column, byteOffset); break;
case 3: Uniform_State<3>(programObject, location + matrix, column, byteOffset); break;
default: Uniform_State<4>(programObject, location + matrix, column, byteOffset); break;
}
}
}
}
// Helper function to transpose a 2x2 matrix
void TransposeMatrix2x2(const GLfloat* input, GLfloat* output) {
// Input matrix is in column-major order (OpenGL default)
// [0 2]
// [1 3]
//
// Output matrix should be in row-major order if transpose is true
// [0 1]
// [2 3]
output[0] = input[0]; // 0,0 element stays the same
output[1] = input[2]; // 0,1 element becomes 1,0
output[2] = input[1]; // 1,0 element becomes 0,1
output[3] = input[3]; // 1,1 element stays the same
}
// Helper function to transpose a 3x3 matrix
void TransposeMatrix3x3(const GLfloat* input, GLfloat* output) {
// Input matrix is in column-major order (OpenGL default)
// [0 3 6]
// [1 4 7]
// [2 5 8]
//
// Output matrix should be in row-major order if transpose is true
// [0 1 2]
// [3 4 5]
// [6 7 8]
output[0] = input[0]; // 0,0 element stays the same
output[1] = input[3]; // 0,1 element becomes 1,0
output[2] = input[6]; // 0,2 element becomes 2,0
output[3] = input[1]; // 1,0 element becomes 0,1
output[4] = input[4]; // 1,1 element stays the same
output[5] = input[7]; // 1,2 element becomes 2,1
output[6] = input[2]; // 2,0 element becomes 0,2
output[7] = input[5]; // 2,1 element becomes 1,2
output[8] = input[8]; // 2,2 element stays the same
}
// Helper function to transpose a 4x4 matrix
void TransposeMatrix4x4(const GLfloat* input, GLfloat* output) {
// Input matrix is in column-major order (OpenGL default)
// [0 4 8 12]
// [1 5 9 13]
// [2 6 10 14]
// [3 7 11 15]
//
// Output matrix should be in row-major order if transpose is true
// [0 1 2 3]
// [4 5 6 7]
// [8 9 10 11]
// [12 13 14 15]
output[0] = input[0]; // 0,0 element stays the same
output[1] = input[4]; // 0,1 element becomes 1,0
output[2] = input[8]; // 0,2 element becomes 2,0
output[3] = input[12]; // 0,3 element becomes 3,0
output[4] = input[1]; // 1,0 element becomes 0,1
output[5] = input[5]; // 1,1 element stays the same
output[6] = input[9]; // 1,2 element becomes 2,1
output[7] = input[13]; // 1,3 element becomes 3,1
output[8] = input[2]; // 2,0 element becomes 0,2
output[9] = input[6]; // 2,1 element becomes 1,2
output[10] = input[10]; // 2,2 element stays the same
output[11] = input[14]; // 2,3 element becomes 3,2
output[12] = input[3]; // 3,0 element becomes 0,3
output[13] = input[7]; // 3,1 element becomes 1,3
output[14] = input[11]; // 3,2 element becomes 2,3
output[15] = input[15]; // 3,3 element stays the same
}
void Uniform1fv_State(GLint location, GLsizei count, const GLfloat* value) {
Uniformv_State<1>(location, count, value);
}
void Uniform2fv_State(GLint location, GLsizei count, const GLfloat* value) {
Uniformv_State<2>(location, count, value);
}
void Uniform3fv_State(GLint location, GLsizei count, const GLfloat* value) {
Uniformv_State<3>(location, count, value);
}
void Uniform4fv_State(GLint location, GLsizei count, const GLfloat* value) {
Uniformv_State<4>(location, count, value);
}
void Uniform1iv_State(GLint location, GLsizei count, const GLint* value) {
Uniformv_State<1>(location, count, value);
}
void Uniform2iv_State(GLint location, GLsizei count, const GLint* value) {
Uniformv_State<2>(location, count, value);
}
void Uniform3iv_State(GLint location, GLsizei count, const GLint* value) {
Uniformv_State<3>(location, count, value);
}
void Uniform4iv_State(GLint location, GLsizei count, const GLint* value) {
Uniformv_State<4>(location, count, value);
}
void Uniform1uiv_State(GLint location, GLsizei count, const GLuint* value) {
Uniformv_State<1>(location, count, value);
}
void UniformMatrix2fv_State(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
// A mat2 is NOT four contiguous floats in the global UBO: std140 pads each column
// vector out to 16 bytes, so column 1 starts at byte 16, not byte 8.
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixfv_Object(*programObject, __func__, location, count, transpose, value, 2, 2,
"the current program object");
}
void UniformMatrix3fv_State(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
// For 3x3 matrices, we have 9 elements per matrix
// If transpose is GL_TRUE, we need to transpose the matrix data
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
// For matrix uniforms, we handle each matrix individually
// Handle padding in mat3 correctly!!
for (GLint i = 0; i < count; i++) {
if (i > 0 && !programObject->UniformLocationsAliasSameUniform(location, location + i)) {
// Values for elements beyond the end of the uniform array are ignored.
break;
}
if (!programObject->IsValidUniformLocation(location + i)) {
RecordInvalidUniformLocationError(__func__, location + i, "the current program object");
return;
}
if (transpose == GL_TRUE) {
// Transpose the matrix before uploading
GLfloat transposedMatrix[9];
TransposeMatrix3x3(value + i * 9, transposedMatrix);
for (int row = 0; row < 3; ++row) {
Uniform_State<3>(*programObject, location + i, transposedMatrix + row * 3, row * 4 * sizeof(float));
}
} else {
// No transpose needed, directly copy the matrix data
for (int row = 0; row < 3; ++row) {
Uniform_State<3>(*programObject, location + i, value + i * 9 + row * 3, row * 4 * sizeof(float));
}
}
}
}
void UniformMatrix4fv_State(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
// For 4x4 matrices, we have 16 elements per matrix
// If transpose is GL_TRUE, we need to transpose the matrix data
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
// For matrix uniforms, we handle each matrix individually
for (GLint i = 0; i < count; i++) {
if (i > 0 && !programObject->UniformLocationsAliasSameUniform(location, location + i)) {
// Values for elements beyond the end of the uniform array are ignored.
break;
}
if (!programObject->IsValidUniformLocation(location + i)) {
RecordInvalidUniformLocationError(__func__, location + i, "the current program object");
return;
}
if (transpose == GL_TRUE) {
// Transpose the matrix before uploading
GLfloat transposedMatrix[16];
TransposeMatrix4x4(value + i * 16, transposedMatrix);
Uniform_State<16>(*programObject, location + i, transposedMatrix);
} else {
// No transpose needed, directly copy the matrix data
Uniform_State<16>(*programObject, location + i, value + i * 16);
}
}
}
void UniformMatrixNonSquarefv_State(const char* caller, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value, Int columns, Int rows) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller, "There is no current program object."));
return;
}
UniformMatrixfv_Object(*programObject, caller, location, count, transpose, value, columns, rows,
"the current program object");
}
void ProgramUniformMatrix2fv_State(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixfv_Object(*programObject, __func__, location, count, transpose, value, 2, 2,
"program " + std::to_string(program));
}
void ProgramUniformMatrix3fv_State(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
for (GLint i = 0; i < count; i++) {
if (i > 0 && !programObject->UniformLocationsAliasSameUniform(location, location + i)) {
// Values for elements beyond the end of the uniform array are ignored.
break;
}
if (!programObject->IsValidUniformLocation(location + i)) {
RecordInvalidUniformLocationError(__func__, location + i, "program " + std::to_string(program));
return;
}
if (transpose == GL_TRUE) {
GLfloat transposedMatrix[9];
TransposeMatrix3x3(value + i * 9, transposedMatrix);
for (int row = 0; row < 3; ++row) {
Uniform_State<3>(*programObject, location + i, transposedMatrix + row * 3, row * 4 * sizeof(float));
}
} else {
for (int row = 0; row < 3; ++row) {
Uniform_State<3>(*programObject, location + i, value + i * 9 + row * 3, row * 4 * sizeof(float));
}
}
}
}
void ProgramUniformMatrix4fv_State(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
for (GLint i = 0; i < count; i++) {
if (i > 0 && !programObject->UniformLocationsAliasSameUniform(location, location + i)) {
// Values for elements beyond the end of the uniform array are ignored.
break;
}
if (!programObject->IsValidUniformLocation(location + i)) {
RecordInvalidUniformLocationError(__func__, location + i, "program " + std::to_string(program));
return;
}
if (transpose == GL_TRUE) {
GLfloat transposedMatrix[16];
TransposeMatrix4x4(value + i * 16, transposedMatrix);
Uniform_State<16>(*programObject, location + i, transposedMatrix);
} else {
Uniform_State<16>(*programObject, location + i, value + i * 16);
}
}
}
void ProgramUniformMatrixNonSquarefv_State(const char* caller, GLuint program, GLint location, GLsizei count,
GLboolean transpose, const GLfloat* value, Int columns, Int rows) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixfv_Object(*programObject, caller, location, count, transpose, value, columns, rows,
"program " + std::to_string(program));
}
GLuint GetUniformBlockIndex_State(GLuint program, const GLchar* uniformBlockName) {
const auto& programObject = TryToGetProgramObject(program);
if (!programObject) return GL_INVALID_INDEX;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) +
" is not a program object that has been linked."));
return GL_INVALID_INDEX;
}
const auto& index = programObject->GetUniformBlockIndex(uniformBlockName);
MGLOG_D("GBI prog=%u name='%s' -> %d", program, uniformBlockName ? uniformBlockName : "(null)", (Int)index);
return index;
}
void UniformBlockBinding_State(GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding) {
const auto& programObject = TryToGetProgramObject(program);
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"Program object" + std::to_string(program) + " that has been linked."));
return;
}
if (!programObject->IsActiveUniformBlock(uniformBlockIndex)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"uniformBlockIndex " + std::to_string(uniformBlockIndex) +
" is greater than or equal to the value of `GL_ACTIVE_UNIFORM_BLOCKS` or is "
"not the index of an active uniform block in program" +
std::to_string(program) + "."));
return;
}
MGLOG_D("UBB prog=%u idx=%u binding=%u", program, uniformBlockIndex, uniformBlockBinding);
programObject->SetUniformBlockBinding(uniformBlockIndex, uniformBlockBinding);
}
void GetActiveUniformBlockiv_State(GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint* params) {
const auto& programObject = TryToGetProgramObject(program);
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"Program object" + std::to_string(program) + " that has been linked."));
return;
}
if (!programObject->IsActiveUniformBlock(uniformBlockIndex)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"uniformBlockIndex " + std::to_string(uniformBlockIndex) +
" is greater than or equal to the value of `GL_ACTIVE_UNIFORM_BLOCKS` or is "
"not the index of an active uniform block in program" +
std::to_string(program) + "."));
return;
}
switch (pname) {
case GL_UNIFORM_BLOCK_DATA_SIZE: {
*params = (GLint)programObject->GetUBOSizeAt(uniformBlockIndex);
MGLOG_D("%s: GL_UNIFORM_BLOCK_DATA_SIZE = %d", __func__, *params);
break;
}
case GL_UNIFORM_BLOCK_NAME_LENGTH: {
*params = (GLint)programObject->GetUniformBlockName(uniformBlockIndex).length() + 1;
MGLOG_D("%s: GL_UNIFORM_BLOCK_NAME_LENGTH = %d", __func__, *params);
break;
}
case GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS: {
*params = programObject->GetUniformBlockActiveUniformCount(uniformBlockIndex);
MGLOG_D("%s: GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS = %d", __func__, *params);
break;
}
case GL_UNIFORM_BLOCK_BINDING: {
*params = static_cast<GLint>(programObject->GetUniformBlockBinding(uniformBlockIndex));
MGLOG_D("%s: GL_UNIFORM_BLOCK_BINDING = %d", __func__, *params);
break;
}
case GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER:
*params = BoolToGLInt(programObject->IsUniformBlockReferencedByStage(uniformBlockIndex, EShLangVertex));
MGLOG_D("%s: GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER = %d", __func__, *params);
break;
case GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER:
*params =
BoolToGLInt(programObject->IsUniformBlockReferencedByStage(uniformBlockIndex, EShLangTessControl));
MGLOG_D("%s: GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_CONTROL_SHADER = %d", __func__, *params);
break;
case GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER:
*params =
BoolToGLInt(programObject->IsUniformBlockReferencedByStage(uniformBlockIndex, EShLangTessEvaluation));
MGLOG_D("%s: GL_UNIFORM_BLOCK_REFERENCED_BY_TESS_EVALUATION_SHADER = %d", __func__, *params);
break;
case GL_UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER:
*params = BoolToGLInt(programObject->IsUniformBlockReferencedByStage(uniformBlockIndex, EShLangGeometry));
MGLOG_D("%s: GL_UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER = %d", __func__, *params);
break;
case GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER:
*params = BoolToGLInt(programObject->IsUniformBlockReferencedByStage(uniformBlockIndex, EShLangFragment));
MGLOG_D("%s: GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER = %d", __func__, *params);
break;
case GL_UNIFORM_BLOCK_REFERENCED_BY_COMPUTE_SHADER:
*params = BoolToGLInt(programObject->IsUniformBlockReferencedByStage(uniformBlockIndex, EShLangCompute));
MGLOG_D("%s: GL_UNIFORM_BLOCK_REFERENCED_BY_COMPUTE_SHADER = %d", __func__, *params);
break;
case GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES: {
// Member entries of an arrayed block are recorded against the first instance;
// every instance of the array reports that shared member set (matches
// GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, which scans with the same owner index).
const Int ownerIndex = static_cast<Int>(programObject->GetUniformBlockMemberOwnerIndex(uniformBlockIndex));
GLint uniformIndexCount = 0;
for (Uint uniformIndex = 0; uniformIndex < programObject->GetUniformCount(); ++uniformIndex) {
if (programObject->GetActiveUniformBlockIndex(uniformIndex) != ownerIndex) {
continue;
}
params[uniformIndexCount++] = static_cast<GLint>(uniformIndex);
}
MGLOG_D("%s: GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES count = %d", __func__, uniformIndexCount);
break;
}
default:
MGLOG_E("%s: unknown pname = %p %s", __func__, pname, MG_Util::ConvertGLEnumToString(pname).c_str());
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"pname " + std::to_string(pname) + " is not one of the accepted tokens."));
break;
}
}
void GetActiveUniformBlockName_State(GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei* length,
GLchar* uniformBlockName) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) +
" is not a program object that has been linked."));
return;
}
if (!programObject->IsActiveUniformBlock(uniformBlockIndex)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"uniformBlockIndex " + std::to_string(uniformBlockIndex) +
" is greater than or equal to the value of `GL_ACTIVE_UNIFORM_BLOCKS` or is "
"not the index of an active uniform block in program."));
return;
}
const auto& name = programObject->GetUniformBlockName(uniformBlockIndex);
CopyStr(bufSize, length, uniformBlockName, name.c_str(), (GLsizei)name.length());
MGLOG_D("%s: \"%s\" at uniformBlockIndex %02d, length = %d", __func__, uniformBlockName, uniformBlockIndex,
length ? *length : 0);
}
void BindFragDataLocationIndexed_State(GLuint program, GLuint colorNumber, GLuint index, const char* name) {
auto& programObject = TryToGetProgramObject(program);
// TryToGetProgramObject already recorded the error for a bad handle (GL_INVALID_VALUE for an
// unknown name, GL_INVALID_OPERATION for a non-program object); do not record a second one.
if (!programObject) return;
if (name == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "name cannot be null."));
return;
}
// index selects the single (0) or dual-source (1) color; it must be 0 or 1.
if (index > 1) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "index must be 0 or 1."));
return;
}
const auto& dynamicParameters = MG_Backend::pActiveBackendObject->GetDynamicParameters();
// colorNumber is bounded by GL_MAX_DRAW_BUFFERS for index 0, and by
// GL_MAX_DUAL_SOURCE_DRAW_BUFFERS (which MobileGL reports as 1) for index 1.
const GLuint colorNumberLimit =
(index == 0) ? static_cast<GLuint>(dynamicParameters.MaxDrawBuffers) : 1u;
if (colorNumber >= colorNumberLimit) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"colorNumber exceeds the applicable draw-buffer limit."));
return;
}
if (strncmp(name, "gl_", 3) == 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"name " + std::string(name) + " starts with the reserved prefix `gl_`."));
return;
}
MGLOG_D("%s: loc %02d index %u = \"%s\"", __func__, colorNumber, index, name);
programObject->SetExplicitFragmentOutLocation(colorNumber, name);
programObject->SetExplicitFragmentOutIndex(index, name);
}
// glBindFragDataLocation is glBindFragDataLocationIndexed with color index 0.
void BindFragDataLocation_State(GLuint program, GLuint colorNumber, const char* name) {
BindFragDataLocationIndexed_State(program, colorNumber, 0, name);
}
GLint GetFragDataLocation_State(GLuint program, const char* name) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return -1; // TryToGetProgramObject already recorded the error.
if (name == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "name cannot be null."));
return -1;
}
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) + " has not been linked successfully."));
return -1;
}
return programObject->GetFragmentDataLocation(name);
}
GLint GetFragDataIndex_State(GLuint program, const char* name) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return -1; // TryToGetProgramObject already recorded the error.
if (name == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "name cannot be null."));
return -1;
}
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) + " has not been linked successfully."));
return -1;
}
// Returns the color index bound by glBindFragDataLocationIndexed (0 by default), or -1 if name
// is not an active user-defined output. Note: the index is tracked for reflection but is not
// yet plumbed into dual-source blend rendering, and shader-side layout(index=) is not reflected.
return programObject->GetFragmentDataIndex(name);
}
void ValidateProgram_State(GLuint program) {
// THROW_UNIMPL_EXCEPTION;
}
void AttachShader(GLuint program, GLuint shader) {
AttachShader_State(program, shader);
}
void BindAttribLocation(GLuint program, GLuint index, const GLchar* name) {
BindAttribLocation_State(program, index, name);
}
void CompileShader(GLuint shader) {
CompileShader_State(shader);
}
void MaxShaderCompilerThreadsKHR(GLuint count) {
MaxShaderCompilerThreadsKHR_State(count);
}
// GL_ARB_parallel_shader_compile's spelling of the same entry point.
void MaxShaderCompilerThreadsARB(GLuint count) {
MaxShaderCompilerThreadsKHR_State(count);
}
GLuint CreateProgram(void) {
return CreateProgram_State();
}
GLuint CreateShader(GLenum type) {
return CreateShader_State(type);
}
void DeleteProgram(GLuint program) {
DeleteProgram_State(program);
}
void DeleteShader(GLuint shader) {
DeleteShader_State(shader);
}
void DetachShader(GLuint program, GLuint shader) {
DetachShader_State(program, shader);
}
void GetActiveAttrib(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLint* size, GLenum* type,
GLchar* name) {
GetActiveAttrib_State(program, index, bufSize, length, size, type, name);
}
void GetActiveUniform(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLint* size, GLenum* type,
GLchar* name) {
GetActiveUniform_State(program, index, bufSize, length, size, type, name);
}
void GetActiveUniformName(GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei* length,
GLchar* uniformName) {
GetActiveUniform_State(program, uniformIndex, bufSize, length, nullptr, nullptr, uniformName);
}
void GetUniformIndices(GLuint program, GLsizei uniformCount, const GLchar* const* uniformNames,
GLuint* uniformIndices) {
GetUniformIndices_State(program, uniformCount, uniformNames, uniformIndices);
}
void GetActiveUniformsiv(GLuint program, GLsizei uniformCount, const GLuint* uniformIndices, GLenum pname,
GLint* params) {
GetActiveUniformsiv_State(program, uniformCount, uniformIndices, pname, params);
}
void GetAttachedShaders(GLuint program, GLsizei maxCount, GLsizei* count, GLuint* shaders) {
GetAttachedShaders_State(program, maxCount, count, shaders);
}
GLint GetAttribLocation(GLuint program, const GLchar* name) {
return GetAttribLocation_State(program, name);
}
void GetProgramiv(GLuint program, GLenum pname, GLint* params) {
GetProgramiv_State(program, pname, params);
}
void GetProgramInfoLog(GLuint program, GLsizei bufSize, GLsizei* length, GLchar* infoLog) {
GetProgramInfoLog_State(program, bufSize, length, infoLog);
}
void GetShaderiv(GLuint shader, GLenum pname, GLint* params) {
GetShaderiv_State(shader, pname, params);
}
void GetShaderInfoLog(GLuint shader, GLsizei bufSize, GLsizei* length, GLchar* infoLog) {
GetShaderInfoLog_State(shader, bufSize, length, infoLog);
}
void GetShaderSource(GLuint shader, GLsizei bufSize, GLsizei* length, GLchar* source) {
GetShaderSource_State(shader, bufSize, length, source);
}
GLint GetUniformLocation(GLuint program, const GLchar* name) {
return GetUniformLocation_State(program, name);
}
void GetUniformfv(GLuint program, GLint location, GLfloat* params) {
GetUniformfv_State(program, location, params);
}
void GetUniformiv(GLuint program, GLint location, GLint* params) {
GetUniformiv_State(program, location, params);
}
void GetUniformuiv(GLuint program, GLint location, GLuint* params) {
GetUniformuiv_State(program, location, params);
}
GLboolean IsProgram(GLuint program) {
return IsProgram_State(program);
}
GLboolean IsShader(GLuint shader) {
return IsShader_State(shader);
}
void LinkProgram(GLuint program) {
LinkProgram_State(program);
}
void ShaderSource(GLuint shader, GLsizei count, const GLchar* const* string, const GLint* length) {
ShaderSource_State(shader, count, string, length);
}
void UseProgram(GLuint program) {
UseProgram_State(program);
}
void Uniform1f(GLint location, GLfloat v0) {
Uniform1fv(location, 1, &v0);
}
void Uniform2f(GLint location, GLfloat v0, GLfloat v1) {
GLfloat v[] = {v0, v1};
Uniform2fv(location, 1, v);
}
void Uniform3f(GLint location, GLfloat v0, GLfloat v1, GLfloat v2) {
GLfloat v[] = {v0, v1, v2};
Uniform3fv(location, 1, v);
}
void Uniform4f(GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3) {
GLfloat v[] = {v0, v1, v2, v3};
Uniform4fv(location, 1, v);
}
void Uniform1i(GLint location, GLint v0) {
Uniform1iv(location, 1, &v0);
}
void Uniform2i(GLint location, GLint v0, GLint v1) {
GLint v[] = {v0, v1};
Uniform2iv(location, 1, v);
}
void Uniform3i(GLint location, GLint v0, GLint v1, GLint v2) {
GLint v[] = {v0, v1, v2};
Uniform3iv(location, 1, v);
}
void Uniform4i(GLint location, GLint v0, GLint v1, GLint v2, GLint v3) {
GLint v[] = {v0, v1, v2, v3};
Uniform4iv(location, 1, v);
}
void Uniform1ui(GLint location, GLuint v0) {
Uniform1uiv(location, 1, &v0);
}
void Uniform2ui(GLint location, GLuint v0, GLuint v1) {
GLuint v[] = {v0, v1};
Uniform2uiv(location, 1, v);
}
void Uniform3ui(GLint location, GLuint v0, GLuint v1, GLuint v2) {
GLuint v[] = {v0, v1, v2};
Uniform3uiv(location, 1, v);
}
void Uniform4ui(GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3) {
GLuint v[] = {v0, v1, v2, v3};
Uniform4uiv(location, 1, v);
}
void Uniform1d(GLint location, GLdouble v0) {
const GLdouble v[] = {v0};
Uniformv_State<1>(location, 1, v);
}
void Uniform1dv(GLint location, GLsizei count, const GLdouble* value) {
Uniformv_State<1>(location, count, value);
}
void ProgramUniform1d(GLuint program, GLint location, GLdouble v0) {
const GLdouble v[] = {v0};
ProgramUniformv_State<1>(program, location, 1, v);
}
void ProgramUniform1dv(GLuint program, GLint location, GLsizei count, const GLdouble* value) {
ProgramUniformv_State<1>(program, location, count, value);
}
void Uniform2d(GLint location, GLdouble v0, GLdouble v1) {
const GLdouble v[] = {v0, v1};
Uniformv_State<2>(location, 1, v);
}
void Uniform2dv(GLint location, GLsizei count, const GLdouble* value) {
Uniformv_State<2>(location, count, value);
}
void ProgramUniform2d(GLuint program, GLint location, GLdouble v0, GLdouble v1) {
const GLdouble v[] = {v0, v1};
ProgramUniformv_State<2>(program, location, 1, v);
}
void ProgramUniform2dv(GLuint program, GLint location, GLsizei count, const GLdouble* value) {
ProgramUniformv_State<2>(program, location, count, value);
}
void Uniform3d(GLint location, GLdouble v0, GLdouble v1, GLdouble v2) {
const GLdouble v[] = {v0, v1, v2};
Uniformv_State<3>(location, 1, v);
}
void Uniform3dv(GLint location, GLsizei count, const GLdouble* value) {
Uniformv_State<3>(location, count, value);
}
void ProgramUniform3d(GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2) {
const GLdouble v[] = {v0, v1, v2};
ProgramUniformv_State<3>(program, location, 1, v);
}
void ProgramUniform3dv(GLuint program, GLint location, GLsizei count, const GLdouble* value) {
ProgramUniformv_State<3>(program, location, count, value);
}
void Uniform4d(GLint location, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3) {
const GLdouble v[] = {v0, v1, v2, v3};
Uniformv_State<4>(location, 1, v);
}
void Uniform4dv(GLint location, GLsizei count, const GLdouble* value) {
Uniformv_State<4>(location, count, value);
}
void ProgramUniform4d(GLuint program, GLint location, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3) {
const GLdouble v[] = {v0, v1, v2, v3};
ProgramUniformv_State<4>(program, location, 1, v);
}
void ProgramUniform4dv(GLuint program, GLint location, GLsizei count, const GLdouble* value) {
ProgramUniformv_State<4>(program, location, count, value);
}
void UniformMatrix2dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 2, 2);
}
void ProgramUniformMatrix2dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 2, 2);
}
void UniformMatrix3dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 3, 3);
}
void ProgramUniformMatrix3dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 3, 3);
}
void UniformMatrix4dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 4, 4);
}
void ProgramUniformMatrix4dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 4, 4);
}
void UniformMatrix2x3dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 2, 3);
}
void ProgramUniformMatrix2x3dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 2, 3);
}
void UniformMatrix2x4dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 2, 4);
}
void ProgramUniformMatrix2x4dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 2, 4);
}
void UniformMatrix3x2dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 3, 2);
}
void ProgramUniformMatrix3x2dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 3, 2);
}
void UniformMatrix3x4dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 3, 4);
}
void ProgramUniformMatrix3x4dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 3, 4);
}
void UniformMatrix4x2dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 4, 2);
}
void ProgramUniformMatrix4x2dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 4, 2);
}
void UniformMatrix4x3dv(GLint location, GLsizei count, GLboolean transpose, const GLdouble* value) {
if (location == -1) return;
auto& programObject = MG_State::pGLContext->GetProgramForUniform();
if (programObject == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "There is no current program object."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 4, 3);
}
void ProgramUniformMatrix4x3dv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLdouble* value) {
if (location == -1) return;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"program " + std::to_string(program) + " is not linked."));
return;
}
UniformMatrixdv_Object(*programObject, location, count, transpose, value, 4, 3);
}
void GetUniformdv(GLuint program, GLint location, GLdouble* params) {
GetUniformdv_State(program, location, params);
}
void Uniform1fv(GLint location, GLsizei count, const GLfloat* value) {
Uniform1fv_State(location, count, value);
}
void Uniform2fv(GLint location, GLsizei count, const GLfloat* value) {
Uniform2fv_State(location, count, value);
}
void Uniform3fv(GLint location, GLsizei count, const GLfloat* value) {
Uniform3fv_State(location, count, value);
}
void Uniform4fv(GLint location, GLsizei count, const GLfloat* value) {
Uniform4fv_State(location, count, value);
}
void Uniform1iv(GLint location, GLsizei count, const GLint* value) {
Uniform1iv_State(location, count, value);
}
void Uniform2iv(GLint location, GLsizei count, const GLint* value) {
Uniform2iv_State(location, count, value);
}
void Uniform3iv(GLint location, GLsizei count, const GLint* value) {
Uniform3iv_State(location, count, value);
}
void Uniform4iv(GLint location, GLsizei count, const GLint* value) {
Uniform4iv_State(location, count, value);
}
void Uniform1uiv(GLint location, GLsizei count, const GLuint* value) {
Uniformv_State<1>(location, count, value);
}
void Uniform2uiv(GLint location, GLsizei count, const GLuint* value) {
Uniformv_State<2>(location, count, value);
}
void Uniform3uiv(GLint location, GLsizei count, const GLuint* value) {
Uniformv_State<3>(location, count, value);
}
void Uniform4uiv(GLint location, GLsizei count, const GLuint* value) {
Uniformv_State<4>(location, count, value);
}
void UniformMatrix2fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrix2fv_State(location, count, transpose, value);
}
void UniformMatrix3fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrix3fv_State(location, count, transpose, value);
}
void UniformMatrix4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrix4fv_State(location, count, transpose, value);
}
void UniformMatrix2x3fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrixNonSquarefv_State(__func__, location, count, transpose, value, 2, 3);
}
void UniformMatrix3x2fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrixNonSquarefv_State(__func__, location, count, transpose, value, 3, 2);
}
void UniformMatrix2x4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrixNonSquarefv_State(__func__, location, count, transpose, value, 2, 4);
}
void UniformMatrix4x2fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrixNonSquarefv_State(__func__, location, count, transpose, value, 4, 2);
}
void UniformMatrix3x4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrixNonSquarefv_State(__func__, location, count, transpose, value, 3, 4);
}
void UniformMatrix4x3fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value) {
UniformMatrixNonSquarefv_State(__func__, location, count, transpose, value, 4, 3);
}
void ProgramUniform1f(GLuint program, GLint location, GLfloat v0) {
ProgramUniform1fv(program, location, 1, &v0);
}
void ProgramUniform2f(GLuint program, GLint location, GLfloat v0, GLfloat v1) {
GLfloat v[] = {v0, v1};
ProgramUniform2fv(program, location, 1, v);
}
void ProgramUniform3f(GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2) {
GLfloat v[] = {v0, v1, v2};
ProgramUniform3fv(program, location, 1, v);
}
void ProgramUniform4f(GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3) {
GLfloat v[] = {v0, v1, v2, v3};
ProgramUniform4fv(program, location, 1, v);
}
void ProgramUniform1i(GLuint program, GLint location, GLint v0) {
ProgramUniform1iv(program, location, 1, &v0);
}
void ProgramUniform2i(GLuint program, GLint location, GLint v0, GLint v1) {
GLint v[] = {v0, v1};
ProgramUniform2iv(program, location, 1, v);
}
void ProgramUniform3i(GLuint program, GLint location, GLint v0, GLint v1, GLint v2) {
GLint v[] = {v0, v1, v2};
ProgramUniform3iv(program, location, 1, v);
}
void ProgramUniform4i(GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3) {
GLint v[] = {v0, v1, v2, v3};
ProgramUniform4iv(program, location, 1, v);
}
void ProgramUniform1ui(GLuint program, GLint location, GLuint v0) {
ProgramUniform1uiv(program, location, 1, &v0);
}
void ProgramUniform2ui(GLuint program, GLint location, GLuint v0, GLuint v1) {
GLuint v[] = {v0, v1};
ProgramUniform2uiv(program, location, 1, v);
}
void ProgramUniform3ui(GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2) {
GLuint v[] = {v0, v1, v2};
ProgramUniform3uiv(program, location, 1, v);
}
void ProgramUniform4ui(GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3) {
GLuint v[] = {v0, v1, v2, v3};
ProgramUniform4uiv(program, location, 1, v);
}
void ProgramUniform1fv(GLuint program, GLint location, GLsizei count, const GLfloat* value) {
ProgramUniformv_State<1>(program, location, count, value);
}
void ProgramUniform2fv(GLuint program, GLint location, GLsizei count, const GLfloat* value) {
ProgramUniformv_State<2>(program, location, count, value);
}
void ProgramUniform3fv(GLuint program, GLint location, GLsizei count, const GLfloat* value) {
ProgramUniformv_State<3>(program, location, count, value);
}
void ProgramUniform4fv(GLuint program, GLint location, GLsizei count, const GLfloat* value) {
ProgramUniformv_State<4>(program, location, count, value);
}
void ProgramUniform1iv(GLuint program, GLint location, GLsizei count, const GLint* value) {
ProgramUniformv_State<1>(program, location, count, value);
}
void ProgramUniform2iv(GLuint program, GLint location, GLsizei count, const GLint* value) {
ProgramUniformv_State<2>(program, location, count, value);
}
void ProgramUniform3iv(GLuint program, GLint location, GLsizei count, const GLint* value) {
ProgramUniformv_State<3>(program, location, count, value);
}
void ProgramUniform4iv(GLuint program, GLint location, GLsizei count, const GLint* value) {
ProgramUniformv_State<4>(program, location, count, value);
}
void ProgramUniform1uiv(GLuint program, GLint location, GLsizei count, const GLuint* value) {
ProgramUniformv_State<1>(program, location, count, value);
}
void ProgramUniform2uiv(GLuint program, GLint location, GLsizei count, const GLuint* value) {
ProgramUniformv_State<2>(program, location, count, value);
}
void ProgramUniform3uiv(GLuint program, GLint location, GLsizei count, const GLuint* value) {
ProgramUniformv_State<3>(program, location, count, value);
}
void ProgramUniform4uiv(GLuint program, GLint location, GLsizei count, const GLuint* value) {
ProgramUniformv_State<4>(program, location, count, value);
}
void ProgramUniformMatrix2fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrix2fv_State(program, location, count, transpose, value);
}
void ProgramUniformMatrix3fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrix3fv_State(program, location, count, transpose, value);
}
void ProgramUniformMatrix4fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrix4fv_State(program, location, count, transpose, value);
}
void ProgramUniformMatrix2x3fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrixNonSquarefv_State(__func__, program, location, count, transpose, value, 2, 3);
}
void ProgramUniformMatrix3x2fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrixNonSquarefv_State(__func__, program, location, count, transpose, value, 3, 2);
}
void ProgramUniformMatrix2x4fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrixNonSquarefv_State(__func__, program, location, count, transpose, value, 2, 4);
}
void ProgramUniformMatrix4x2fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrixNonSquarefv_State(__func__, program, location, count, transpose, value, 4, 2);
}
void ProgramUniformMatrix3x4fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrixNonSquarefv_State(__func__, program, location, count, transpose, value, 3, 4);
}
void ProgramUniformMatrix4x3fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value) {
ProgramUniformMatrixNonSquarefv_State(__func__, program, location, count, transpose, value, 4, 3);
}
GLuint GetUniformBlockIndex(GLuint program, const GLchar* uniformBlockName) {
return GetUniformBlockIndex_State(program, uniformBlockName);
}
void UniformBlockBinding(GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding) {
UniformBlockBinding_State(program, uniformBlockIndex, uniformBlockBinding);
}
void GetActiveUniformBlockiv(GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint* params) {
GetActiveUniformBlockiv_State(program, uniformBlockIndex, pname, params);
}
void GetActiveUniformBlockName(GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei* length,
GLchar* uniformBlockName) {
GetActiveUniformBlockName_State(program, uniformBlockIndex, bufSize, length, uniformBlockName);
}
void BindFragDataLocation(GLuint program, GLuint colorNumber, const char* name) {
BindFragDataLocation_State(program, colorNumber, name);
}
void BindFragDataLocationIndexed(GLuint program, GLuint colorNumber, GLuint index, const char* name) {
BindFragDataLocationIndexed_State(program, colorNumber, index, name);
}
GLint GetFragDataLocation(GLuint program, const char* name) {
return GetFragDataLocation_State(program, name);
}
GLint GetFragDataIndex(GLuint program, const char* name) {
return GetFragDataIndex_State(program, name);
}
void GetProgramInterfaceiv(GLuint program, GLenum programInterface, GLenum pname, GLint* params) {
auto& programObject = TryToGetProgramForInterfaceQuery(program, __func__);
if (!programObject) return;
if (!ValidateProgramInterfaceivQuery(programInterface, pname)) return;
if (!params) return;
switch (pname) {
case GL_ACTIVE_RESOURCES:
*params = ProgramInterface::GetActiveResourceCount(*programObject, programInterface);
return;
case GL_MAX_NAME_LENGTH:
*params = ProgramInterface::GetMaxNameLength(*programObject, programInterface);
return;
case GL_MAX_NUM_ACTIVE_VARIABLES:
*params = ProgramInterface::GetMaxNumActiveVariables(*programObject, programInterface);
return;
default:
// GL_MAX_NUM_COMPATIBLE_SUBROUTINES: the subroutine interfaces are always empty
// here (glslang refuses `subroutine` when generating SPIR-V), so zero it is.
*params = 0;
return;
}
}
GLuint GetProgramResourceIndex(GLuint program, GLenum programInterface, const GLchar* name) {
auto& programObject = TryToGetProgramForInterfaceQuery(program, __func__);
if (!programObject) return GL_INVALID_INDEX;
if (!ValidateNamedProgramResourceInterface(programInterface, __func__)) return GL_INVALID_INDEX;
if (!name) return GL_INVALID_INDEX;
return ProgramInterface::GetResourceIndex(*programObject, programInterface, name);
}
void GetProgramResourceName(GLuint program, GLenum programInterface, GLuint index, GLsizei bufSize, GLsizei* length,
GLchar* name) {
auto& programObject = TryToGetProgramForInterfaceQuery(program, __func__);
if (!programObject) return;
if (!ValidateNamedProgramResourceInterface(programInterface, __func__)) return;
if (bufSize < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "bufSize must be non-negative."));
return;
}
String resourceName;
if (!ProgramInterface::GetResourceName(*programObject, programInterface, index, resourceName)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "index is out of range."));
return;
}
CopyStr(bufSize, length, name, resourceName.c_str(), static_cast<GLsizei>(resourceName.length()));
}
void GetProgramResourceiv(GLuint program, GLenum programInterface, GLuint index, GLsizei propCount,
const GLenum* props, GLsizei bufSize, GLsizei* length, GLint* params) {
auto& programObject = TryToGetProgramForInterfaceQuery(program, __func__);
if (!programObject) return;
if (!ProgramInterface::IsInterfaceEnum(programInterface)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "Unsupported program interface."));
return;
}
if (propCount <= 0 || bufSize < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue, MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"propCount must be positive and bufSize "
"non-negative."));
return;
}
if (props == nullptr) return;
// Both prop checks run BEFORE any value is produced: a property this command does
// not know at all is INVALID_ENUM, one it knows but the interface does not carry is
// INVALID_OPERATION (GL 4.6 Table 7.2). The two are deliberately different errors.
for (GLsizei i = 0; i < propCount; ++i) {
if (!ProgramInterface::IsResourceProp(props[i])) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "prop is not a valid property name."));
return;
}
if (!ProgramInterface::InterfaceSupportsProp(programInterface, props[i])) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"prop is not supported for this program interface."));
return;
}
}
Vector<GLint> values;
for (GLsizei i = 0; i < propCount; ++i) {
if (!ProgramInterface::GetResourceProp(*programObject, programInterface, index, props[i], values)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "index is out of range."));
return;
}
}
if (params == nullptr) return;
const GLsizei written = static_cast<GLsizei>(std::min<SizeT>(values.size(), static_cast<SizeT>(bufSize)));
for (GLsizei i = 0; i < written; ++i) params[i] = values[i];
if (length) *length = written;
}
GLint GetProgramResourceLocation(GLuint program, GLenum programInterface, const GLchar* name) {
// Unlike the four queries above, this one and GetProgramResourceLocationIndex really
// do require a successful link (GL 4.6 §7.3.1.3).
auto& programObject = TryToGetLinkedProgramForInterfaceQuery(program, __func__);
if (!programObject) return -1;
if (!ProgramInterface::InterfaceHasLocations(programInterface)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"Program interface has no locations."));
return -1;
}
return ProgramInterface::GetResourceLocation(*programObject, programInterface, name);
}
GLint GetProgramResourceLocationIndex(GLuint program, GLenum programInterface, const GLchar* name) {
auto& programObject = TryToGetLinkedProgramForInterfaceQuery(program, __func__);
if (!programObject) return -1;
if (programInterface != GL_PROGRAM_OUTPUT) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"GetProgramResourceLocationIndex only accepts GL_PROGRAM_OUTPUT."));
return -1;
}
return ProgramInterface::GetResourceLocationIndex(*programObject, programInterface, name);
}
// GL 4.6 §7.6.2: <storageBlockIndex> is an active shader storage block index of <program>
// - that is, exactly what glGetProgramResourceIndex(GL_SHADER_STORAGE_BLOCK) returned.
// Since wave 2 that index is the interface-query layer's, so this is where the one index
// space the application sees gets turned into whatever the backend's is; the backends are
// handed the block NAME and do their own lookup. Getting this wrong is silent: the call
// succeeds and rebinds a DIFFERENT buffer.
void ShaderStorageBlockBinding(GLuint program, GLuint storageBlockIndex, GLuint storageBlockBinding) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject || !programObject->GetLinkStatus()) return;
if (!ValidateShaderStorageBlockBinding(storageBlockBinding)) return;
String blockName;
if (!ProgramInterface::GetResourceName(*programObject, GL_SHADER_STORAGE_BLOCK, storageBlockIndex,
blockName)) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"storageBlockIndex is not an active shader storage block index."));
return;
}
// Recorded before the backend call, and independently of whether a backend is even
// present: this is the state GL_BUFFER_BINDING reports, and it is also what reseeds a
// backend's own reflection cache after any rebuild.
programObject->SetShaderStorageBlockBinding(blockName, storageBlockBinding);
auto shaderStorageBlockBinding = MG_Backend::gBackendFunctionsTable.GL.ShaderStorageBlockBinding;
if (!shaderStorageBlockBinding) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"Backend does not support shader storage block binding."));
return;
}
shaderStorageBlockBinding(program, blockName.c_str(), storageBlockBinding);
}
void ValidateProgram(GLuint program) {
ValidateProgram_State(program);
}
// ARB_get_program_binary with no supported binary format (GL_NUM_PROGRAM_BINARY_FORMATS
// is 0, which the extension explicitly allows). The three entry points below are what an
// application - and dEQP's function loader - reach through the extension; without it
// glProgramParameteri is not exposed in a 4.0 context at all.
void ProgramParameteri(GLuint program, GLenum pname, GLint value) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (pname != GL_PROGRAM_BINARY_RETRIEVABLE_HINT && pname != GL_PROGRAM_SEPARABLE) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "pname is not an accepted value."));
return;
}
if (value != GL_TRUE && value != GL_FALSE) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "value must be GL_TRUE or GL_FALSE."));
return;
}
if (pname == GL_PROGRAM_SEPARABLE) {
programObject->SetSeparable(value == GL_TRUE);
return;
}
programObject->SetBinaryRetrievableHint(value == GL_TRUE);
}
// GL 4.6 core 7.3: glCreateShaderProgramv is defined as the exact sequence below, so it
// is written as that sequence rather than as a private shortcut - every error it can
// raise is one of theirs, raised at the point they would raise it.
GLuint CreateShaderProgramv(GLenum type, GLsizei count, const GLchar* const* strings) {
// GL 4.6 core 7.3: a negative count is INVALID_VALUE and is checked before anything
// is created, so a bad count never leaks a shader name. An unrecognised type is
// INVALID_ENUM, which CreateShader_State raises below.
if (count < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "count must be non-negative."));
return 0;
}
const GLuint shader = CreateShader_State(type);
if (shader == 0) return 0;
ShaderSource_State(shader, count, strings, nullptr);
CompileShader_State(shader);
const GLuint program = CreateProgram_State();
if (program != 0) {
const auto& shaderObject = MG_State::pGLContext->GetShaderObject(shader);
const auto& programObject = MG_State::pGLContext->GetProgramObject(program);
// The program is separable whether or not the shader compiled: a failed
// compile leaves an unlinked but otherwise well-formed separable program.
if (programObject) programObject->SetSeparable(true);
if (shaderObject && programObject && shaderObject->GetCompileStatus()) {
AttachShader_State(program, shader);
// Not LinkProgram_State: that injects a default fragment shader into a
// program that has none, which is exactly wrong for a separable
// vertex-stage program - the pipeline supplies the real one.
programObject->Link(false);
// glDetachShader defers the removal to the next link, so the program keeps
// the shader object it was built from while no longer reporting it attached.
DetachShader_State(program, shader);
}
if (shaderObject && programObject && !shaderObject->GetInfoLog().empty()) {
programObject->AppendInfoLog(shaderObject->GetInfoLog());
}
}
DeleteShader_State(shader);
return program;
}
void GetProgramBinary(GLuint program, GLsizei bufSize, GLsizei* length, GLenum* binaryFormat, void* binary) {
(void)binaryFormat;
(void)binary;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (bufSize < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "bufSize must be non-negative."));
return;
}
if (length) *length = 0;
// GL_PROGRAM_BINARY_LENGTH is always zero here, which the spec makes an error to ask for.
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "The program has no retrievable binary."));
}
void ProgramBinary(GLuint program, GLenum binaryFormat, const void* binary, GLsizei length) {
(void)binaryFormat;
(void)binary;
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (length < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "length must be non-negative."));
return;
}
// No format is supported, so every binary is rejected - and the program's link status
// has to read FALSE afterwards.
programObject->MarkLinkFailedByProgramBinary();
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "binaryFormat is not a supported format."));
}
void TransformFeedbackVaryings(GLuint program, GLsizei count, const GLchar* const* varyings, GLenum bufferMode) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (bufferMode != GL_INTERLEAVED_ATTRIBS && bufferMode != GL_SEPARATE_ATTRIBS) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "bufferMode is not a valid capture mode."));
return;
}
if (count < 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__, "count must be non-negative."));
return;
}
// GL 3.3 core: SEPARATE_ATTRIBS count may not exceed the separate-attrib limit.
if (bufferMode == GL_SEPARATE_ATTRIBS && count > 4) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"count exceeds GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS."));
return;
}
Vector<String> names;
names.reserve(static_cast<SizeT>(count));
for (GLsizei i = 0; i < count; ++i) {
names.emplace_back(varyings != nullptr && varyings[i] != nullptr ? varyings[i] : "");
}
// ARB_transform_feedback3's special names only mean anything in an interleaved
// capture, and gl_NextBuffer cannot advance past the last capture buffer.
constexpr Uint maxTransformFeedbackBuffers = 4;
Uint nextBufferCount = 0;
for (const String& name : names) {
const Bool isNextBuffer = name == "gl_NextBuffer";
const Bool isSkipComponents = name.size() == 18 && name.compare(0, 17, "gl_SkipComponents") == 0 &&
name[17] >= '1' && name[17] <= '4';
if (!isNextBuffer && !isSkipComponents) continue;
if (bufferMode != GL_INTERLEAVED_ATTRIBS) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"'" + name + "' requires GL_INTERLEAVED_ATTRIBS."));
return;
}
if (isNextBuffer && ++nextBufferCount >= maxTransformFeedbackBuffers) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
"More gl_NextBuffer entries than "
"GL_MAX_TRANSFORM_FEEDBACK_BUFFERS allows."));
return;
}
}
programObject->SetTransformFeedbackVaryings(Move(names), bufferMode);
}
void GetTransformFeedbackVarying(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLsizei* size,
GLenum* type, GLchar* name) {
auto& programObject = TryToGetProgramObject(program);
if (!programObject) return;
if (!programObject->GetLinkStatus()) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", __func__,
std::to_string(program) + " has not been successfully linked."));
return;
}
const auto* varying = programObject->GetTransformFeedbackVarying(index);
if (varying == nullptr) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>(
"MG_Impl/GLImpl", __func__,
"index is not an active transform feedback varying of the program."));
return;
}
if (size != nullptr) *size = varying->size;
if (type != nullptr) *type = varying->type;
GLsizei written = 0;
if (name != nullptr && bufSize > 0) {
written = std::min<GLsizei>(bufSize - 1, static_cast<GLsizei>(varying->name.size()));
Memcpy(name, varying->name.data(), static_cast<SizeT>(written));
name[written] = '\0';
}
if (length != nullptr) *length = written;
}
} // namespace MobileGL::MG_Impl::GLImpl
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