forked from suyu/suyu
77 lines
2.7 KiB
C++
77 lines
2.7 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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#include "common/common_types.h"
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#include "video_core/engines/maxwell_3d.h"
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#include "video_core/renderer_opengl/gl_shader_manager.h"
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namespace OpenGL::GLShader {
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using Tegra::Engines::Maxwell3D;
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ProgramManager::ProgramManager() {
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pipeline.Create();
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}
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ProgramManager::~ProgramManager() = default;
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void ProgramManager::ApplyTo(OpenGLState& state) {
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UpdatePipeline();
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state.draw.shader_program = 0;
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state.draw.program_pipeline = pipeline.handle;
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}
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void ProgramManager::UpdatePipeline() {
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// Avoid updating the pipeline when values have no changed
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if (old_state == current_state) {
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return;
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}
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// Workaround for AMD bug
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constexpr GLenum all_used_stages{GL_VERTEX_SHADER_BIT | GL_GEOMETRY_SHADER_BIT |
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GL_FRAGMENT_SHADER_BIT};
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glUseProgramStages(pipeline.handle, all_used_stages, 0);
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glUseProgramStages(pipeline.handle, GL_VERTEX_SHADER_BIT, current_state.vertex_shader);
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glUseProgramStages(pipeline.handle, GL_GEOMETRY_SHADER_BIT, current_state.geometry_shader);
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glUseProgramStages(pipeline.handle, GL_FRAGMENT_SHADER_BIT, current_state.fragment_shader);
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old_state = current_state;
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}
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void MaxwellUniformData::SetFromRegs(const Maxwell3D& maxwell, std::size_t shader_stage) {
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const auto& regs = maxwell.regs;
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const auto& state = maxwell.state;
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// TODO(bunnei): Support more than one viewport
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viewport_flip[0] = regs.viewport_transform[0].scale_x < 0.0 ? -1.0f : 1.0f;
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viewport_flip[1] = regs.viewport_transform[0].scale_y < 0.0 ? -1.0f : 1.0f;
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auto func{static_cast<u32>(regs.alpha_test_func)};
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// Normalize the gl variants of opCompare to be the same as the normal variants
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const u32 op_gl_variant_base = static_cast<u32>(Maxwell3D::Regs::ComparisonOp::Never);
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if (func >= op_gl_variant_base) {
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func = func - op_gl_variant_base + 1U;
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}
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alpha_test.enabled = regs.alpha_test_enabled;
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alpha_test.func = func;
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alpha_test.ref = regs.alpha_test_ref;
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instance_id = state.current_instance;
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// Assign in which stage the position has to be flipped
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// (the last stage before the fragment shader).
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constexpr u32 geometry_index = static_cast<u32>(Maxwell3D::Regs::ShaderProgram::Geometry);
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if (maxwell.regs.shader_config[geometry_index].enable) {
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flip_stage = geometry_index;
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} else {
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flip_stage = static_cast<u32>(Maxwell3D::Regs::ShaderProgram::VertexB);
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}
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// Y_NEGATE controls what value S2R returns for the Y_DIRECTION system value.
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y_direction = regs.screen_y_control.y_negate == 0 ? 1.f : -1.f;
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}
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} // namespace OpenGL::GLShader
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