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MobileGL/MG/MG_GL/Implementations/GL/Getter/GL_Getter.cpp
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//
// Created by BZLZHH on 2025/3/15.
//
#include "GL_Getter.h"
namespace MG_GL::GL {
static std::string rendererString;
static bool loggedMGInfo;
const GLubyte* GetString(GLenum name) {
if (!loggedMGInfo) {
loggedMGInfo = true;
MG_GL::Getter::LogMGInfo();
}
MG_Util::Debug::LogD("glGetString, name: %s", MG_Util::Debug::GLEnumToString(name));
switch (name) {
case GL_VENDOR:
return (const GLubyte *)"MobileGL-Dev (BZLZHH, Swung0x48, Tungsten)";
case GL_VERSION: {
static std::string versionStr;
if (versionStr.empty()) {
versionStr = std::to_string(MG_Global::GL::GLVersionMajor) + "."
+ std::to_string(MG_Global::GL::GLVersionMinor) + "."
+ std::to_string(MG_Global::GL::GLVersionRevision)
+ " "+ MG_GL::Getter::GetMGName() +
", MobileGL Core, " + MG_GL::Getter::GetBackendName() + " Backend, Version "
+ std::to_string(MG_Global::MG::VersionMajor) + "."
+ std::to_string(MG_Global::MG::VersionMinor) + "."
+ std::to_string(MG_Global::MG::VersionRevision);
if (MG_Global::MG::VersionPatch != 0)
versionStr += "." + std::to_string(MG_Global::MG::VersionPatch);
versionStr += MG_Global::MG::VersionSuffix;
}
return (const GLubyte *)versionStr.c_str();
}
case GL_RENDERER:
{
/*
if (rendererString == std::string("")) {
const char* gpuName = getGpuName();
const char* glesName = getGLESName();
rendererString = std::string(gpuName) + " | " + std::string(glesName);
}
return (const GLubyte *)rendererString.c_str();
*/
return (const GLubyte *)std::format("{} | {} {}.{}",
MG_GL::Getter::GetGPUName(),
MG_GL::Getter::GetBackendGfxAPIName(),
MG_GL::Getter::GetBackendGfxAPIVersionMajor(),
MG_GL::Getter::GetBackendGfxAPIVersionMinor()).c_str();
}
case GL_SHADING_LANGUAGE_VERSION:
return (const GLubyte *) "4.50 MobileGL with glslang";
case GL_EXTENSIONS:
return (const GLubyte *) "OpenGL11 "
"OpenGL12 "
"OpenGL13 "
"OpenGL14 "
"OpenGL15 "
"OpenGL20 "
"OpenGL21 "
"OpenGL30 ";
default:
return (const GLubyte *) "Unknown enum";
}
}
const GLubyte* GetStringi(GLenum name, GLuint index) {
MG_Util::Debug::LogD("glGetStringi, name: %s, index: %d", MG_Util::Debug::GLEnumToString(name), index);
if (name != GL_EXTENSIONS)
return (const GLubyte*)"";
typedef struct {
GLenum name;
const char** parts;
GLuint count;
} StringCache;
static StringCache caches[] = {
{GL_EXTENSIONS, nullptr, 0},
};
static int initialized = 0;
if (!initialized) {
for (auto & cache : caches) {
GLenum target = cache.name;
const GLubyte* str = nullptr;
const char* delimiter = " ";
str = GetString(GL_EXTENSIONS);
char* copy = strdup((const char*)str);
char* token = strtok(copy, delimiter);
while (token) {
cache.parts = (const char**)realloc(cache.parts, (cache.count + 1) * sizeof(char*));
cache.parts[cache.count++] = strdup(token);
token = strtok(nullptr, delimiter);
}
free(copy);
}
initialized = 1;
}
for (auto & cache : caches) {
if (cache.name == name) {
if (index >= cache.count) {
return nullptr;
}
return (const GLubyte*)cache.parts[index];
}
}
return nullptr;
}
GLenum GetError() {
GLenum error = MG_State::GetError();
MG_Util::Debug::LogD("glGetError -> %s", MG_Util::Debug::GLEnumToString(error));
return error;
}
void GetIntegerv(GLenum pname, GLint *params) {
MG_Util::Debug::LogD("glGetIntegerv, pname: %s", MG_Util::Debug::GLEnumToString(pname));
if (!params) {
MG_State::SetError(GL_INVALID_VALUE);
return;
}
switch (pname) {
// General
case GL_CONTEXT_PROFILE_MASK:
params[0] = GL_CONTEXT_CORE_PROFILE_BIT;
break;
case GL_NUM_EXTENSIONS:
static GLint num_extensions = -1;
if (num_extensions == -1) {
const GLubyte* ext_str = MG_GL::GL::GetString(GL_EXTENSIONS);
char *copy = strdup((const char *) ext_str);
char *token = strtok(copy, " ");
num_extensions = 0;
while (token) {
num_extensions++;
token = strtok(nullptr, " ");
}
free(copy);
}
params[0] = num_extensions;
break;
case GL_MAJOR_VERSION:
params[0] = MG_Global::GL::GLVersionMajor;
break;
case GL_MINOR_VERSION:
params[0] = MG_Global::GL::GLVersionMinor;
break;
// Viewport and scissor
case GL_VIEWPORT:
memcpy(params, MG_State_T::commonState->viewport, 4 * sizeof(GLint));
break;
case GL_SCISSOR_BOX:
// TODO: memcpy(params, MG_State_T::commonState->scissorBox, 4 * sizeof(GLint));
break;
case GL_MAX_VIEWPORT_DIMS: {
static const GLint maxDims[2] = {16384, 16384};
memcpy(params, maxDims, sizeof(maxDims));
break;
}
// Buffer bindings
case GL_ARRAY_BUFFER_BINDING:
params[0] = static_cast<GLint>(MG_State_T::bufferState->GetCurrentBinding(GL_ARRAY_BUFFER));
break;
case GL_ELEMENT_ARRAY_BUFFER_BINDING:
params[0] = static_cast<GLint>(MG_State_T::vertexArrayState->GetBoundElementBuffer());
break;
case GL_DRAW_FRAMEBUFFER_BINDING:
params[0] = static_cast<GLint>(MG_State_T::framebufferState->currentBindings_[GL_DRAW_FRAMEBUFFER]);
break;
case GL_READ_FRAMEBUFFER_BINDING:
params[0] = static_cast<GLint>(MG_State_T::framebufferState->currentBindings_[GL_READ_FRAMEBUFFER]);
break;
case GL_RENDERBUFFER_BINDING:
// TODO: params[0] = static_cast<GLint>(MG_State_T::framebufferState->currentRenderbuffer_);
break;
// Program state
case GL_CURRENT_PROGRAM:
params[0] = static_cast<GLint>(MG_State_T::programState->currentProgram_);
break;
case GL_MAX_VERTEX_ATTRIBS:
// TODO: Check the real value
params[0] = MG_Constants::VertexArray::MAX_VERTEX_ATTRIBS;
break;
// Texture state
case GL_TEXTURE_BINDING_2D: {
GLuint unit = MG_State_T::textureState->activeTextureUnit_;
auto& textures = MG_State_T::textureState->textureUnits_[unit].boundTextures;
params[0] = textures.count(GL_TEXTURE_2D) ? static_cast<GLint>(textures[GL_TEXTURE_2D]) : 0;
break;
}
case GL_ACTIVE_TEXTURE:
params[0] = GL_TEXTURE0 + MG_State_T::textureState->activeTextureUnit_;
break;
case GL_MAX_TEXTURE_SIZE:
params[0] = 8192;
break;
// Blend state
case GL_BLEND_SRC_RGB:
params[0] = static_cast<GLint>(MG_State_T::commonState->blendSrcRGB);
break;
case GL_BLEND_DST_RGB:
params[0] = static_cast<GLint>(MG_State_T::commonState->blendDstRGB);
break;
case GL_BLEND_SRC_ALPHA:
params[0] = static_cast<GLint>(MG_State_T::commonState->blendSrcAlpha);
break;
case GL_BLEND_DST_ALPHA:
params[0] = static_cast<GLint>(MG_State_T::commonState->blendDstAlpha);
break;
// Depth and stencil
case GL_DEPTH_FUNC:
params[0] = static_cast<GLint>(MG_State_T::commonState->depthFunc);
break;
case GL_DEPTH_WRITEMASK:
params[0] = static_cast<GLint>(MG_State_T::commonState->depthMask);
break;
case GL_STENCIL_REF:
// TODO: params[0] = MG_State_T::commonState->stencilRef;
break;
// Capability enables
case GL_BLEND:
params[0] = MG_State_T::commonState->capabilities[GL_BLEND] ? GL_TRUE : GL_FALSE;
break;
case GL_DEPTH_TEST:
params[0] = MG_State_T::commonState->capabilities[GL_DEPTH_TEST] ? GL_TRUE : GL_FALSE;
break;
case GL_SCISSOR_TEST:
params[0] = MG_State_T::commonState->capabilities[GL_SCISSOR_TEST] ? GL_TRUE : GL_FALSE;
break;
// Pixel operations
case GL_PACK_ALIGNMENT:
params[0] = MG_State_T::commonState->QueryPixelStoreInt(GL_PACK_ALIGNMENT);
break;
case GL_UNPACK_ALIGNMENT:
params[0] = MG_State_T::commonState->QueryPixelStoreInt(GL_UNPACK_ALIGNMENT);
break;
// Hardware limits, TODO: Check the real values
case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
params[0] = 32;
break;
case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
params[0] = 32;
break;
case GL_MAX_TEXTURE_IMAGE_UNITS:
params[0] = 32;
break;
case GL_MAX_RENDERBUFFER_SIZE:
params[0] = 65537;
break;
case GL_MAX_DRAW_BUFFERS:
params[0] = 32;
break;
case GL_MAX_COLOR_ATTACHMENTS:
params[0] = 32;
break;
// Color state
case GL_COLOR_CLEAR_VALUE: {
const auto& c = MG_State_T::commonState->clearColor;
params[0] = static_cast<GLint>(c[0] * 0x7FFF);
params[1] = static_cast<GLint>(c[1] * 0x7FFF);
params[2] = static_cast<GLint>(c[2] * 0x7FFF);
params[3] = static_cast<GLint>(c[3] * 0x7FFF);
break;
}
case GL_COLOR_WRITEMASK:
params[0] = MG_State_T::commonState->colorMask[0];
params[1] = MG_State_T::commonState->colorMask[1];
params[2] = MG_State_T::commonState->colorMask[2];
params[3] = MG_State_T::commonState->colorMask[3];
break;
// Stencil operations
case GL_STENCIL_CLEAR_VALUE:
// TODO: params[0] = MG_State_T::commonState->stencilClearValue;
break;
case GL_STENCIL_BITS:
// TODO: Check the real value
params[0] = 8;
break;
// Implementation limits
case GL_SUBPIXEL_BITS:
// TODO: Check the real value
params[0] = 4;
break;
case GL_NUM_COMPRESSED_TEXTURE_FORMATS:
// TODO: params[0] = static_cast<GLint>(MG_State_T::textureState->compressedFormats_.size());
break;
case GL_COMPRESSED_TEXTURE_FORMATS:
// TODO: Implement GL_COMPRESSED_TEXTURE_FORMATS
break;
// Polygon state
case GL_POLYGON_OFFSET_FACTOR:
// TODO: params[0] = static_cast<GLint>(MG_State_T::commonState->polygonOffsetFactor);
break;
case GL_POLYGON_OFFSET_UNITS:
// TODO: params[0] = static_cast<GLint>(MG_State_T::commonState->polygonOffsetUnits);
break;
// Others...
default:
MG_Util::Debug::LogE("glGetIntegerv: Invalid enum %s (0x%X)", MG_Util::Debug::GLEnumToString(pname), pname);
MG_State::SetError(GL_INVALID_ENUM);
break;
}
}
}
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