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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <type_traits>
#include <glad/glad.h>
#include "video_core/engines/maxwell_3d.h"
namespace OpenGL {
class OpenGLState {
public:
struct Blend {
bool enabled = false; // GL_BLEND
GLenum rgb_equation = GL_FUNC_ADD; // GL_BLEND_EQUATION_RGB
GLenum a_equation = GL_FUNC_ADD; // GL_BLEND_EQUATION_ALPHA
GLenum src_rgb_func = GL_ONE; // GL_BLEND_SRC_RGB
GLenum dst_rgb_func = GL_ZERO; // GL_BLEND_DST_RGB
GLenum src_a_func = GL_ONE; // GL_BLEND_SRC_ALPHA
GLenum dst_a_func = GL_ZERO; // GL_BLEND_DST_ALPHA
};
std::array<Blend, Tegra::Engines::Maxwell3D::Regs::NumRenderTargets> blend;
struct {
bool enabled = false;
} independant_blend;
static constexpr std::size_t NumSamplers = 32 * 5;
static constexpr std::size_t NumImages = 8 * 5;
std::array<GLuint, NumSamplers> textures = {};
std::array<GLuint, NumSamplers> samplers = {};
std::array<GLuint, NumImages> images = {};
struct {
GLuint read_framebuffer = 0; // GL_READ_FRAMEBUFFER_BINDING
GLuint draw_framebuffer = 0; // GL_DRAW_FRAMEBUFFER_BINDING
GLuint shader_program = 0; // GL_CURRENT_PROGRAM
GLuint program_pipeline = 0; // GL_PROGRAM_PIPELINE_BINDING
} draw;
GLuint renderbuffer{}; // GL_RENDERBUFFER_BINDING
OpenGLState();
/// Get the currently active OpenGL state
static OpenGLState GetCurState() {
return cur_state;
}
/// Apply this state as the current OpenGL state
void Apply();
void ApplyFramebufferState();
void ApplyShaderProgram();
void ApplyProgramPipeline();
void ApplyTargetBlending(std::size_t target, bool force);
void ApplyGlobalBlending();
void ApplyBlending();
void ApplyTextures();
void ApplySamplers();
void ApplyImages();
void ApplyRenderBuffer();
/// Resets any references to the given resource
OpenGLState& UnbindTexture(GLuint handle);
OpenGLState& ResetSampler(GLuint handle);
OpenGLState& ResetProgram(GLuint handle);
OpenGLState& ResetPipeline(GLuint handle);
OpenGLState& ResetFramebuffer(GLuint handle);
OpenGLState& ResetRenderbuffer(GLuint handle);
private:
static OpenGLState cur_state;
};
static_assert(std::is_trivially_copyable_v<OpenGLState>);
} // namespace OpenGL
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