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22ac8a8c10b5d96aa3c946031994a7c089b59463
MobileGL/MobileGL/MG_Impl/GLImpl/Program/GL_Program.h
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swung0x48 22ac8a8c10 [Feat] (MG_Impl/GLImpl, MG_State): implement glBindFragDataLocationIndexed 
Bind a fragment output to both a color number and a color index (0 or 1
for dual-source blending), and report the bound index back through
glGetFragDataIndex.

- ProgramObject now tracks a per-output color index alongside the
  location: SetExplicitFragmentOutIndex stores it, it is snapshotted into
  the linked map at link time (like the location map), and
  GetFragmentDataIndex returns it (0 by default) for an active output.
- glBindFragDataLocation becomes glBindFragDataLocationIndexed with index
  0, matching the GL definition, so it also resets a previously-bound
  index to 0.
- Validation: index must be 0 or 1 (GL_INVALID_VALUE); colorNumber is
  bounded by GL_MAX_DRAW_BUFFERS for index 0 and GL_MAX_DUAL_SOURCE_DRAW_BUFFERS
  (reported as 1) for index 1 (GL_INVALID_VALUE); a gl_ name is
  GL_INVALID_OPERATION.
- glGetFragDataIndex now returns the real bound index instead of a
  hardcoded 0.

The index is tracked for reflection but is not yet plumbed into dual-source
blend rendering, and shader-side layout(index=) qualifiers are not
reflected -- both documented at the call sites.

Tests: index round-trip through a re-link (bind 1 -> GetFragDataIndex == 1;
glBindFragDataLocation resets to 0), plus the validation error table;
mutation-verified end to end. ProgramTest 24/24.
2026-07-11 00:39:23 -04:00

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// MobileGL - MobileGL/MG_Impl/GLImpl/Program/GL_Program.h
// 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
#pragma once
#include <Includes.h>
namespace MobileGL::MG_Impl::GLImpl {
void AttachShader(GLuint program, GLuint shader);
void BindAttribLocation(GLuint program, GLuint index, const GLchar* name);
void CompileShader(GLuint shader);
GLuint CreateProgram(void);
GLuint CreateShader(GLenum type);
void DeleteProgram(GLuint program);
void DeleteShader(GLuint shader);
void DetachShader(GLuint program, GLuint shader);
void GetActiveAttrib(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLint* size, GLenum* type,
GLchar* name);
void GetActiveUniform(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLint* size, GLenum* type,
GLchar* name);
void GetActiveUniformName(GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei* length,
GLchar* uniformName);
void GetUniformIndices(GLuint program, GLsizei uniformCount, const GLchar* const* uniformNames,
GLuint* uniformIndices);
void GetActiveUniformsiv(GLuint program, GLsizei uniformCount, const GLuint* uniformIndices, GLenum pname,
GLint* params);
void GetAttachedShaders(GLuint program, GLsizei maxCount, GLsizei* count, GLuint* shaders);
GLint GetAttribLocation(GLuint program, const GLchar* name);
void GetProgramiv(GLuint program, GLenum pname, GLint* params);
void GetProgramInfoLog(GLuint program, GLsizei bufSize, GLsizei* length, GLchar* infoLog);
void GetShaderiv(GLuint shader, GLenum pname, GLint* params);
void GetShaderInfoLog(GLuint shader, GLsizei bufSize, GLsizei* length, GLchar* infoLog);
void GetShaderSource(GLuint shader, GLsizei bufSize, GLsizei* length, GLchar* source);
GLint GetUniformLocation(GLuint program, const GLchar* name);
void GetUniformfv(GLuint program, GLint location, GLfloat* params);
void GetUniformiv(GLuint program, GLint location, GLint* params);
void GetUniformuiv(GLuint program, GLint location, GLuint* params);
GLboolean IsProgram(GLuint program);
GLboolean IsShader(GLuint shader);
void LinkProgram(GLuint program);
void ShaderSource(GLuint shader, GLsizei count, const GLchar* const* string, const GLint* length);
void UseProgram(GLuint program);
void Uniform1f(GLint location, GLfloat v0);
void Uniform2f(GLint location, GLfloat v0, GLfloat v1);
void Uniform3f(GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
void Uniform4f(GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
void Uniform1i(GLint location, GLint v0);
void Uniform2i(GLint location, GLint v0, GLint v1);
void Uniform3i(GLint location, GLint v0, GLint v1, GLint v2);
void Uniform4i(GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
void Uniform1ui(GLint location, GLuint v0);
void Uniform2ui(GLint location, GLuint v0, GLuint v1);
void Uniform3ui(GLint location, GLuint v0, GLuint v1, GLuint v2);
void Uniform4ui(GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
void Uniform1fv(GLint location, GLsizei count, const GLfloat* value);
void Uniform2fv(GLint location, GLsizei count, const GLfloat* value);
void Uniform3fv(GLint location, GLsizei count, const GLfloat* value);
void Uniform4fv(GLint location, GLsizei count, const GLfloat* value);
void Uniform1iv(GLint location, GLsizei count, const GLint* value);
void Uniform2iv(GLint location, GLsizei count, const GLint* value);
void Uniform3iv(GLint location, GLsizei count, const GLint* value);
void Uniform4iv(GLint location, GLsizei count, const GLint* value);
void Uniform1uiv(GLint location, GLsizei count, const GLuint* value);
void Uniform2uiv(GLint location, GLsizei count, const GLuint* value);
void Uniform3uiv(GLint location, GLsizei count, const GLuint* value);
void Uniform4uiv(GLint location, GLsizei count, const GLuint* value);
void UniformMatrix2fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void UniformMatrix3fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void UniformMatrix4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void ProgramUniform1f(GLuint program, GLint location, GLfloat v0);
void ProgramUniform2f(GLuint program, GLint location, GLfloat v0, GLfloat v1);
void ProgramUniform3f(GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
void ProgramUniform4f(GLuint program, GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
void ProgramUniform1i(GLuint program, GLint location, GLint v0);
void ProgramUniform2i(GLuint program, GLint location, GLint v0, GLint v1);
void ProgramUniform3i(GLuint program, GLint location, GLint v0, GLint v1, GLint v2);
void ProgramUniform4i(GLuint program, GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
void ProgramUniform1ui(GLuint program, GLint location, GLuint v0);
void ProgramUniform2ui(GLuint program, GLint location, GLuint v0, GLuint v1);
void ProgramUniform3ui(GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2);
void ProgramUniform4ui(GLuint program, GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
void ProgramUniform1fv(GLuint program, GLint location, GLsizei count, const GLfloat* value);
void ProgramUniform2fv(GLuint program, GLint location, GLsizei count, const GLfloat* value);
void ProgramUniform3fv(GLuint program, GLint location, GLsizei count, const GLfloat* value);
void ProgramUniform4fv(GLuint program, GLint location, GLsizei count, const GLfloat* value);
void ProgramUniform1iv(GLuint program, GLint location, GLsizei count, const GLint* value);
void ProgramUniform2iv(GLuint program, GLint location, GLsizei count, const GLint* value);
void ProgramUniform3iv(GLuint program, GLint location, GLsizei count, const GLint* value);
void ProgramUniform4iv(GLuint program, GLint location, GLsizei count, const GLint* value);
void ProgramUniform1uiv(GLuint program, GLint location, GLsizei count, const GLuint* value);
void ProgramUniform2uiv(GLuint program, GLint location, GLsizei count, const GLuint* value);
void ProgramUniform3uiv(GLuint program, GLint location, GLsizei count, const GLuint* value);
void ProgramUniform4uiv(GLuint program, GLint location, GLsizei count, const GLuint* value);
void ProgramUniformMatrix2fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
void ProgramUniformMatrix3fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
void ProgramUniformMatrix4fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
void UniformMatrix2x3fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void UniformMatrix3x2fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void UniformMatrix2x4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void UniformMatrix4x2fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void UniformMatrix3x4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void UniformMatrix4x3fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value);
void ProgramUniformMatrix2x3fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
void ProgramUniformMatrix3x2fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
void ProgramUniformMatrix2x4fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
void ProgramUniformMatrix4x2fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
void ProgramUniformMatrix3x4fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
void ProgramUniformMatrix4x3fv(GLuint program, GLint location, GLsizei count, GLboolean transpose,
const GLfloat* value);
GLuint GetUniformBlockIndex(GLuint program, const GLchar* uniformBlockName);
void UniformBlockBinding(GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
void GetActiveUniformBlockiv(GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint* params);
void GetActiveUniformBlockName(GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei* length,
GLchar* uniformBlockName);
void BindFragDataLocation(GLuint program, GLuint colorNumber, const char* name);
void BindFragDataLocationIndexed(GLuint program, GLuint colorNumber, GLuint index, const char* name);
GLint GetFragDataLocation(GLuint program, const char* name);
GLint GetFragDataIndex(GLuint program, const char* name);
void GetProgramInterfaceiv(GLuint program, GLenum programInterface, GLenum pname, GLint* params);
GLuint GetProgramResourceIndex(GLuint program, GLenum programInterface, const GLchar* name);
void GetProgramResourceName(GLuint program, GLenum programInterface, GLuint index, GLsizei bufSize,
GLsizei* length, GLchar* name);
void GetProgramResourceiv(GLuint program, GLenum programInterface, GLuint index, GLsizei propCount,
const GLenum* props, GLsizei bufSize, GLsizei* length, GLint* params);
GLint GetProgramResourceLocation(GLuint program, GLenum programInterface, const GLchar* name);
GLint GetProgramResourceLocationIndex(GLuint program, GLenum programInterface, const GLchar* name);
void ShaderStorageBlockBinding(GLuint program, GLuint storageBlockIndex, GLuint storageBlockBinding);
void ValidateProgram(GLuint program);
} // namespace MobileGL::MG_Impl::GLImpl
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