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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include <span>
#include <glad/glad.h>
#include "video_core/renderer_opengl/gl_device.h"
#include "video_core/renderer_opengl/gl_resource_manager.h"
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) {
glCreateProgramPipelines(1, &pipeline.handle);
if (device.UseAssemblyShaders()) {
glEnable(GL_COMPUTE_PROGRAM_NV);
}
}
void BindComputeProgram(GLuint program) {
glUseProgram(program);
is_compute_bound = true;
}
void BindComputeAssemblyProgram(GLuint program) {
if (current_assembly_compute_program != program) {
current_assembly_compute_program = program;
glBindProgramARB(GL_COMPUTE_PROGRAM_NV, program);
}
UnbindPipeline();
}
void BindSourcePrograms(std::span<const OGLProgram, NUM_STAGES> programs) {
static constexpr std::array<GLenum, 5> stage_enums{
GL_VERTEX_SHADER_BIT, GL_TESS_CONTROL_SHADER_BIT, GL_TESS_EVALUATION_SHADER_BIT,
GL_GEOMETRY_SHADER_BIT, GL_FRAGMENT_SHADER_BIT,
};
for (size_t stage = 0; stage < NUM_STAGES; ++stage) {
if (current_programs[stage] != programs[stage].handle) {
current_programs[stage] = programs[stage].handle;
glUseProgramStages(pipeline.handle, stage_enums[stage], programs[stage].handle);
}
}
BindPipeline();
}
void BindPresentPrograms(GLuint vertex, GLuint fragment) {
if (current_programs[0] != vertex) {
current_programs[0] = vertex;
glUseProgramStages(pipeline.handle, GL_VERTEX_SHADER_BIT, vertex);
}
if (current_programs[4] != fragment) {
current_programs[4] = fragment;
glUseProgramStages(pipeline.handle, GL_FRAGMENT_SHADER_BIT, fragment);
}
glUseProgramStages(
pipeline.handle,
GL_TESS_CONTROL_SHADER_BIT | GL_TESS_EVALUATION_SHADER_BIT | GL_GEOMETRY_SHADER_BIT, 0);
current_programs[1] = 0;
current_programs[2] = 0;
current_programs[3] = 0;
if (current_stage_mask != 0) {
current_stage_mask = 0;
for (const GLenum program_type : ASSEMBLY_PROGRAM_ENUMS) {
glDisable(program_type);
}
}
BindPipeline();
}
void BindAssemblyPrograms(std::span<const OGLAssemblyProgram, NUM_STAGES> programs,
u32 stage_mask) {
const u32 changed_mask = current_stage_mask ^ stage_mask;
current_stage_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_programs[stage] != programs[stage].handle) {
current_programs[stage] = programs[stage].handle;
glBindProgramARB(ASSEMBLY_PROGRAM_ENUMS[stage], programs[stage].handle);
}
}
UnbindPipeline();
}
void RestoreGuestCompute() {}
private:
void BindPipeline() {
if (!is_pipeline_bound) {
is_pipeline_bound = true;
glBindProgramPipeline(pipeline.handle);
}
UnbindCompute();
}
void UnbindPipeline() {
if (is_pipeline_bound) {
is_pipeline_bound = false;
glBindProgramPipeline(0);
}
UnbindCompute();
}
void UnbindCompute() {
if (is_compute_bound) {
is_compute_bound = false;
glUseProgram(0);
}
}
OGLPipeline pipeline;
bool is_pipeline_bound{};
bool is_compute_bound{};
u32 current_stage_mask = 0;
std::array<GLuint, NUM_STAGES> current_programs{};
GLuint current_assembly_compute_program = 0;
};
} // namespace OpenGL
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