118 lines
3.8 KiB
C++
118 lines
3.8 KiB
C++
// Copyright 2018 Citra 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 <memory>
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#include <glad/glad.h>
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#include "video_core/regs_lighting.h"
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#include "video_core/renderer_opengl/gl_resource_manager.h"
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#include "video_core/renderer_opengl/gl_shader_gen.h"
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#include "video_core/renderer_opengl/gl_state.h"
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#include "video_core/renderer_opengl/pica_to_gl.h"
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namespace OpenGL {
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enum class UniformBindings : GLuint { Common, VS, GS };
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struct LightSrc {
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alignas(16) GLvec3 specular_0;
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alignas(16) GLvec3 specular_1;
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alignas(16) GLvec3 diffuse;
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alignas(16) GLvec3 ambient;
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alignas(16) GLvec3 position;
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alignas(16) GLvec3 spot_direction; // negated
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GLfloat dist_atten_bias;
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GLfloat dist_atten_scale;
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};
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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 wether 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 UniformData {
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GLint framebuffer_scale;
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GLint alphatest_ref;
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GLfloat depth_scale;
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GLfloat depth_offset;
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GLfloat shadow_bias_constant;
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GLfloat shadow_bias_linear;
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GLint scissor_x1;
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GLint scissor_y1;
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GLint scissor_x2;
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GLint scissor_y2;
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GLint fog_lut_offset;
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GLint proctex_noise_lut_offset;
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GLint proctex_color_map_offset;
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GLint proctex_alpha_map_offset;
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GLint proctex_lut_offset;
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GLint proctex_diff_lut_offset;
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GLfloat proctex_bias;
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GLint shadow_texture_bias;
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alignas(16) GLivec4 lighting_lut_offset[Pica::LightingRegs::NumLightingSampler / 4];
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alignas(16) GLvec3 fog_color;
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alignas(8) GLvec2 proctex_noise_f;
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alignas(8) GLvec2 proctex_noise_a;
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alignas(8) GLvec2 proctex_noise_p;
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alignas(16) GLvec3 lighting_global_ambient;
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LightSrc light_src[8];
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alignas(16) GLvec4 const_color[6]; // A vec4 color for each of the six tev stages
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alignas(16) GLvec4 tev_combiner_buffer_color;
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alignas(16) GLvec4 clip_coef;
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};
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static_assert(
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sizeof(UniformData) == 0x4F0,
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"The size of the UniformData structure has changed, update the structure in the shader");
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static_assert(sizeof(UniformData) < 16384,
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"UniformData structure must be less than 16kb as per the OpenGL spec");
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/// Uniform struct for the Uniform Buffer Object that contains PICA vertex/geometry shader uniforms.
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// NOTE: the same rule from UniformData also applies here.
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struct PicaUniformsData {
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void SetFromRegs(const Pica::ShaderRegs& regs, const Pica::Shader::ShaderSetup& setup);
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struct BoolAligned {
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alignas(16) GLint b;
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};
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std::array<BoolAligned, 16> bools;
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alignas(16) std::array<GLuvec4, 4> i;
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alignas(16) std::array<GLvec4, 96> f;
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};
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struct VSUniformData {
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PicaUniformsData uniforms;
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};
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static_assert(
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sizeof(VSUniformData) == 1856,
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"The size of the VSUniformData structure has changed, update the structure in the shader");
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static_assert(sizeof(VSUniformData) < 16384,
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"VSUniformData structure must be less than 16kb as per the OpenGL spec");
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/// A class that manage different shader stages and configures them with given config data.
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class ShaderProgramManager {
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public:
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ShaderProgramManager(bool separable, bool is_amd);
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~ShaderProgramManager();
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bool UseProgrammableVertexShader(const PicaVSConfig& config,
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const Pica::Shader::ShaderSetup setup);
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void UseTrivialVertexShader();
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void UseFixedGeometryShader(const PicaFixedGSConfig& config);
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void UseTrivialGeometryShader();
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void UseFragmentShader(const PicaFSConfig& config);
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void ApplyTo(OpenGLState& state);
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private:
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class Impl;
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std::unique_ptr<Impl> impl;
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};
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} // namespace OpenGL
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