forked from suyu/suyu
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// Copyright 2018 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <glad/glad.h>
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#include "video_core/renderer_opengl/gl_resource_manager.h"
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#include "video_core/renderer_opengl/gl_state.h"
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#include "video_core/renderer_opengl/maxwell_to_gl.h"
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namespace OpenGL::GLShader {
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using Tegra::Engines::Maxwell3D;
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/// Uniform structure for the Uniform Buffer Object, all vectors must be 16-byte aligned
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// NOTE: Always keep a vec4 at the end. The GL spec is not clear whether the alignment at
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// the end of a uniform block is included in UNIFORM_BLOCK_DATA_SIZE or not.
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// Not following that rule will cause problems on some AMD drivers.
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struct MaxwellUniformData {
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void SetFromRegs(const Maxwell3D::State::ShaderStageInfo& shader_stage);
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alignas(16) GLvec4 viewport_flip;
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struct alignas(16) {
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GLuint instance_id;
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GLuint flip_stage;
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GLfloat y_direction;
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};
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struct alignas(16) {
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GLuint enabled;
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GLuint func;
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GLfloat ref;
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GLuint padding;
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} alpha_test;
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};
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static_assert(sizeof(MaxwellUniformData) == 48, "MaxwellUniformData structure size is incorrect");
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static_assert(sizeof(MaxwellUniformData) < 16384,
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"MaxwellUniformData structure must be less than 16kb as per the OpenGL spec");
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class ProgramManager {
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public:
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ProgramManager() {
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pipeline.Create();
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}
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void UseProgrammableVertexShader(GLuint program) {
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vs = program;
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}
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void UseProgrammableGeometryShader(GLuint program) {
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gs = program;
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}
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void UseProgrammableFragmentShader(GLuint program) {
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fs = program;
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}
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void UseTrivialGeometryShader() {
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gs = 0;
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}
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void ApplyTo(OpenGLState& state) {
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// Workaround for AMD bug
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glUseProgramStages(pipeline.handle,
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GL_VERTEX_SHADER_BIT | GL_GEOMETRY_SHADER_BIT | GL_FRAGMENT_SHADER_BIT,
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0);
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glUseProgramStages(pipeline.handle, GL_VERTEX_SHADER_BIT, vs);
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glUseProgramStages(pipeline.handle, GL_GEOMETRY_SHADER_BIT, gs);
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glUseProgramStages(pipeline.handle, GL_FRAGMENT_SHADER_BIT, fs);
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state.draw.shader_program = 0;
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state.draw.program_pipeline = pipeline.handle;
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state.geometry_shaders.enabled = (gs != 0);
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}
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private:
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OGLPipeline pipeline;
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GLuint vs{}, fs{}, gs{};
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};
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} // namespace OpenGL::GLShader
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