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// Copyright 2008 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "Common/GL/GLUtil.h"
#include "Common/GL/GLContext.h"
#include "Common/Logging/Log.h"
namespace GLUtil
{
GLuint CompileProgram(const std::string& vertexShader, const std::string& fragmentShader)
{
// generate objects
GLuint vertexShaderID = glCreateShader(GL_VERTEX_SHADER);
GLuint fragmentShaderID = glCreateShader(GL_FRAGMENT_SHADER);
GLuint programID = glCreateProgram();
// compile vertex shader
const char* shader = vertexShader.c_str();
glShaderSource(vertexShaderID, 1, &shader, nullptr);
glCompileShader(vertexShaderID);
#if defined(_DEBUG) || defined(DEBUGFAST)
GLint Result = GL_FALSE;
char stringBuffer[1024];
GLsizei stringBufferUsage = 0;
glGetShaderiv(vertexShaderID, GL_COMPILE_STATUS, &Result);
glGetShaderInfoLog(vertexShaderID, 1024, &stringBufferUsage, stringBuffer);
if (Result && stringBufferUsage)
{
ERROR_LOG_FMT(VIDEO, "GLSL vertex shader warnings:\n{}{}", stringBuffer, vertexShader);
}
else if (!Result)
{
ERROR_LOG_FMT(VIDEO, "GLSL vertex shader error:\n{}{}", stringBuffer, vertexShader);
}
else
{
INFO_LOG_FMT(VIDEO, "GLSL vertex shader compiled:\n{}", vertexShader);
}
bool shader_errors = !Result;
#endif
// compile fragment shader
shader = fragmentShader.c_str();
glShaderSource(fragmentShaderID, 1, &shader, nullptr);
glCompileShader(fragmentShaderID);
#if defined(_DEBUG) || defined(DEBUGFAST)
glGetShaderiv(fragmentShaderID, GL_COMPILE_STATUS, &Result);
glGetShaderInfoLog(fragmentShaderID, 1024, &stringBufferUsage, stringBuffer);
if (Result && stringBufferUsage)
{
ERROR_LOG_FMT(VIDEO, "GLSL fragment shader warnings:\n{}{}", stringBuffer, fragmentShader);
}
else if (!Result)
{
ERROR_LOG_FMT(VIDEO, "GLSL fragment shader error:\n{}{}", stringBuffer, fragmentShader);
}
else
{
INFO_LOG_FMT(VIDEO, "GLSL fragment shader compiled:\n{}", fragmentShader);
}
shader_errors |= !Result;
#endif
// link them
glAttachShader(programID, vertexShaderID);
glAttachShader(programID, fragmentShaderID);
glLinkProgram(programID);
#if defined(_DEBUG) || defined(DEBUGFAST)
glGetProgramiv(programID, GL_LINK_STATUS, &Result);
glGetProgramInfoLog(programID, 1024, &stringBufferUsage, stringBuffer);
if (Result && stringBufferUsage)
{
ERROR_LOG_FMT(VIDEO, "GLSL linker warnings:\n{}{}{}", stringBuffer, vertexShader,
fragmentShader);
}
else if (!Result && !shader_errors)
{
ERROR_LOG_FMT(VIDEO, "GLSL linker error:\n{}{}{}", stringBuffer, vertexShader, fragmentShader);
}
#endif
// cleanup
glDeleteShader(vertexShaderID);
glDeleteShader(fragmentShaderID);
return programID;
}
void EnablePrimitiveRestart(const GLContext* context)
{
constexpr GLuint PRIMITIVE_RESTART_INDEX = 65535;
if (context->IsGLES())
{
glEnable(GL_PRIMITIVE_RESTART_FIXED_INDEX);
}
else
{
if (GLExtensions::Version() >= 310)
{
glEnable(GL_PRIMITIVE_RESTART);
glPrimitiveRestartIndex(PRIMITIVE_RESTART_INDEX);
}
else
{
glEnableClientState(GL_PRIMITIVE_RESTART_NV);
glPrimitiveRestartIndexNV(PRIMITIVE_RESTART_INDEX);
}
}
}
} // namespace GLUtil
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