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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 <array>
#include <span>
#include <glad/glad.h>
#include "video_core/renderer_opengl/gl_resource_manager.h"
#include "video_core/renderer_opengl/gl_device.h"
#pragma optimize("", off)
namespace OpenGL {
class ProgramManager {
static constexpr size_t NUM_STAGES = 5;
static constexpr std::array ASSEMBLY_PROGRAM_ENUMS{
GL_VERTEX_PROGRAM_NV, GL_TESS_CONTROL_PROGRAM_NV, GL_TESS_EVALUATION_PROGRAM_NV,
GL_GEOMETRY_PROGRAM_NV, GL_FRAGMENT_PROGRAM_NV,
};
public:
explicit ProgramManager(const Device& device) {
if (device.UseAssemblyShaders()) {
glEnable(GL_COMPUTE_PROGRAM_NV);
}
}
void BindProgram(GLuint program) {
if (current_source_program == program) {
return;
}
current_source_program = program;
glUseProgram(program);
}
void BindComputeAssemblyProgram(GLuint program) {
if (current_compute_assembly_program != program) {
current_compute_assembly_program = program;
glBindProgramARB(GL_COMPUTE_PROGRAM_NV, program);
}
if (current_source_program != 0) {
current_source_program = 0;
glUseProgram(0);
}
}
void BindAssemblyPrograms(std::span<const OGLAssemblyProgram, NUM_STAGES> programs,
u32 stage_mask) {
const u32 changed_mask = current_assembly_mask ^ stage_mask;
current_assembly_mask = stage_mask;
if (changed_mask != 0) {
for (size_t stage = 0; stage < NUM_STAGES; ++stage) {
if (((changed_mask >> stage) & 1) != 0) {
if (((stage_mask >> stage) & 1) != 0) {
glEnable(ASSEMBLY_PROGRAM_ENUMS[stage]);
} else {
glDisable(ASSEMBLY_PROGRAM_ENUMS[stage]);
}
}
}
}
for (size_t stage = 0; stage < NUM_STAGES; ++stage) {
if (current_assembly_programs[stage] != programs[stage].handle) {
current_assembly_programs[stage] = programs[stage].handle;
glBindProgramARB(ASSEMBLY_PROGRAM_ENUMS[stage], programs[stage].handle);
}
}
if (current_source_program != 0) {
current_source_program = 0;
glUseProgram(0);
}
}
void RestoreGuestCompute() {}
private:
GLuint current_source_program = 0;
u32 current_assembly_mask = 0;
std::array<GLuint, NUM_STAGES> current_assembly_programs;
GLuint current_compute_assembly_program = 0;
};
} // namespace OpenGL
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