120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <array>
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#include <string>
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#include <vector>
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#include <glad/glad.h>
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "video_core/renderer_opengl/gl_shader_util.h"
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#include "video_core/renderer_opengl/gl_vars.h"
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namespace OpenGL {
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GLuint LoadShader(std::string_view source, GLenum type) {
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const std::string version = GLES ? R"(#version 320 es
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#define CITRA_GLES
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#if defined(GL_ANDROID_extension_pack_es31a)
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#extension GL_ANDROID_extension_pack_es31a : enable
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#endif // defined(GL_ANDROID_extension_pack_es31a)
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#if defined(GL_EXT_clip_cull_distance)
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#extension GL_EXT_clip_cull_distance : enable
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#endif // defined(GL_EXT_clip_cull_distance)
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)"
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: "#version 430 core\n";
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std::string_view debug_type;
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switch (type) {
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case GL_VERTEX_SHADER:
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debug_type = "vertex";
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break;
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case GL_GEOMETRY_SHADER:
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debug_type = "geometry";
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break;
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case GL_FRAGMENT_SHADER:
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debug_type = "fragment";
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break;
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default:
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UNREACHABLE();
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}
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std::array<const GLchar*, 2> src_arr{version.data(), source.data()};
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std::array<GLint, 2> lengths{static_cast<GLint>(version.size()),
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static_cast<GLint>(source.size())};
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GLuint shader_id = glCreateShader(type);
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glShaderSource(shader_id, static_cast<GLsizei>(src_arr.size()), src_arr.data(), lengths.data());
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LOG_DEBUG(Render_OpenGL, "Compiling {} shader...", debug_type);
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glCompileShader(shader_id);
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GLint result = GL_FALSE;
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GLint info_log_length;
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glGetShaderiv(shader_id, GL_COMPILE_STATUS, &result);
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glGetShaderiv(shader_id, GL_INFO_LOG_LENGTH, &info_log_length);
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if (info_log_length > 1) {
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std::vector<char> shader_error(info_log_length);
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glGetShaderInfoLog(shader_id, info_log_length, nullptr, &shader_error[0]);
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if (result == GL_TRUE) {
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LOG_DEBUG(Render_OpenGL, "{}", &shader_error[0]);
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} else {
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LOG_ERROR(Render_OpenGL, "Error compiling {} shader:\n{}", debug_type,
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&shader_error[0]);
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LOG_ERROR(Render_OpenGL, "Shader source code:\n{}{}", src_arr[0], src_arr[1]);
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}
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}
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return shader_id;
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}
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GLuint LoadProgram(bool separable_program, std::span<const GLuint> shaders) {
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// Link the program
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LOG_DEBUG(Render_OpenGL, "Linking program...");
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GLuint program_id = glCreateProgram();
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for (GLuint shader : shaders) {
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if (shader != 0) {
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glAttachShader(program_id, shader);
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}
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}
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if (separable_program) {
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glProgramParameteri(program_id, GL_PROGRAM_SEPARABLE, GL_TRUE);
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}
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glProgramParameteri(program_id, GL_PROGRAM_BINARY_RETRIEVABLE_HINT, GL_TRUE);
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glLinkProgram(program_id);
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// Check the program
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GLint result = GL_FALSE;
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GLint info_log_length;
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glGetProgramiv(program_id, GL_LINK_STATUS, &result);
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glGetProgramiv(program_id, GL_INFO_LOG_LENGTH, &info_log_length);
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if (info_log_length > 1) {
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std::vector<char> program_error(info_log_length);
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glGetProgramInfoLog(program_id, info_log_length, nullptr, &program_error[0]);
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if (result == GL_TRUE) {
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LOG_DEBUG(Render_OpenGL, "{}", &program_error[0]);
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} else {
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LOG_ERROR(Render_OpenGL, "Error linking shader:\n{}", &program_error[0]);
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}
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}
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ASSERT_MSG(result == GL_TRUE, "Shader not linked");
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for (GLuint shader : shaders) {
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if (shader != 0) {
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glDetachShader(program_id, shader);
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}
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}
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return program_id;
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}
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} // namespace OpenGL
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