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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <iterator>
#include <glad/glad.h>
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/microprofile.h"
#include "video_core/renderer_opengl/gl_state.h"
MICROPROFILE_DEFINE(OpenGL_State, "OpenGL", "State Change", MP_RGB(192, 128, 128));
namespace OpenGL {
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
OpenGLState OpenGLState::cur_state;
namespace {
template <typename T>
bool UpdateValue(T& current_value, const T new_value) {
const bool changed = current_value != new_value;
current_value = new_value;
return changed;
}
template <typename T1, typename T2>
bool UpdateTie(T1 current_value, const T2 new_value) {
const bool changed = current_value != new_value;
current_value = new_value;
return changed;
}
template <typename T>
std::optional<std::pair<GLuint, GLsizei>> UpdateArray(T& current_values, const T& new_values) {
std::optional<std::size_t> first;
std::size_t last;
for (std::size_t i = 0; i < std::size(current_values); ++i) {
if (!UpdateValue(current_values[i], new_values[i])) {
continue;
}
if (!first) {
first = i;
}
last = i;
}
if (!first) {
return std::nullopt;
}
return std::make_pair(static_cast<GLuint>(*first), static_cast<GLsizei>(last - *first + 1));
}
void Enable(GLenum cap, bool enable) {
if (enable) {
glEnable(cap);
} else {
glDisable(cap);
}
}
void Enable(GLenum cap, GLuint index, bool enable) {
if (enable) {
glEnablei(cap, index);
} else {
glDisablei(cap, index);
}
}
void Enable(GLenum cap, bool& current_value, bool new_value) {
if (UpdateValue(current_value, new_value)) {
Enable(cap, new_value);
}
}
void Enable(GLenum cap, GLuint index, bool& current_value, bool new_value) {
if (UpdateValue(current_value, new_value)) {
Enable(cap, index, new_value);
}
}
} // Anonymous namespace
OpenGLState::OpenGLState() = default;
void OpenGLState::ApplyFramebufferState() {
if (UpdateValue(cur_state.draw.read_framebuffer, draw.read_framebuffer)) {
glBindFramebuffer(GL_READ_FRAMEBUFFER, draw.read_framebuffer);
}
if (UpdateValue(cur_state.draw.draw_framebuffer, draw.draw_framebuffer)) {
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, draw.draw_framebuffer);
}
}
void OpenGLState::ApplyShaderProgram() {
if (UpdateValue(cur_state.draw.shader_program, draw.shader_program)) {
glUseProgram(draw.shader_program);
}
}
void OpenGLState::ApplyProgramPipeline() {
if (UpdateValue(cur_state.draw.program_pipeline, draw.program_pipeline)) {
glBindProgramPipeline(draw.program_pipeline);
}
}
void OpenGLState::ApplyRenderBuffer() {
if (cur_state.renderbuffer != renderbuffer) {
cur_state.renderbuffer = renderbuffer;
glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
}
}
void OpenGLState::Apply() {
MICROPROFILE_SCOPE(OpenGL_State);
ApplyFramebufferState();
ApplyShaderProgram();
ApplyProgramPipeline();
ApplyRenderBuffer();
}
OpenGLState& OpenGLState::ResetProgram(GLuint handle) {
if (draw.shader_program == handle) {
draw.shader_program = 0;
}
return *this;
}
OpenGLState& OpenGLState::ResetPipeline(GLuint handle) {
if (draw.program_pipeline == handle) {
draw.program_pipeline = 0;
}
return *this;
}
OpenGLState& OpenGLState::ResetFramebuffer(GLuint handle) {
if (draw.read_framebuffer == handle) {
draw.read_framebuffer = 0;
}
if (draw.draw_framebuffer == handle) {
draw.draw_framebuffer = 0;
}
return *this;
}
OpenGLState& OpenGLState::ResetRenderbuffer(GLuint handle) {
if (renderbuffer == handle) {
renderbuffer = 0;
}
return *this;
}
} // namespace OpenGL
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