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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <cstddef>
#include <glad/glad.h>
#include "video_core/renderer_opengl/gl_resource_manager.h"
#include "video_core/renderer_opengl/maxwell_to_gl.h"
namespace OpenGL::GLShader {
/// Uniform structure for the Uniform Buffer Object, all vectors must be 16-byte aligned
/// @note Always keep a vec4 at the end. The GL spec is not clear whether the alignment at
/// the end of a uniform block is included in UNIFORM_BLOCK_DATA_SIZE or not.
/// Not following that rule will cause problems on some AMD drivers.
struct alignas(16) MaxwellUniformData {
void SetFromRegs(const Tegra::Engines::Maxwell3D& maxwell);
GLfloat y_direction;
};
static_assert(sizeof(MaxwellUniformData) == 16, "MaxwellUniformData structure size is incorrect");
static_assert(sizeof(MaxwellUniformData) < 16384,
"MaxwellUniformData structure must be less than 16kb as per the OpenGL spec");
class ProgramManager {
public:
~ProgramManager();
void Create();
void Update();
void UseVertexShader(GLuint program) {
current_state.vertex_shader = program;
}
void UseGeometryShader(GLuint program) {
current_state.geometry_shader = program;
}
void UseFragmentShader(GLuint program) {
current_state.fragment_shader = program;
}
GLuint GetHandle() const {
return pipeline.handle;
}
void UseTrivialFragmentShader() {
current_state.fragment_shader = 0;
}
private:
struct PipelineState {
bool operator==(const PipelineState& rhs) const {
return vertex_shader == rhs.vertex_shader && fragment_shader == rhs.fragment_shader &&
geometry_shader == rhs.geometry_shader;
}
bool operator!=(const PipelineState& rhs) const {
return !operator==(rhs);
}
GLuint vertex_shader{};
GLuint fragment_shader{};
GLuint geometry_shader{};
};
OGLPipeline pipeline;
PipelineState current_state;
PipelineState old_state;
};
} // namespace OpenGL::GLShader
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