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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include "video_core/shader/shader.h"
namespace Pica {
struct State;
class GeometryPipelineBackend;
/// A pipeline receiving from vertex shader and sending to geometry shader and primitive assembler
class GeometryPipeline {
public:
explicit GeometryPipeline(State& state);
~GeometryPipeline();
/// Sets the handler for receiving vertex outputs from vertex shader
void SetVertexHandler(Shader::VertexHandler vertex_handler);
/**
* Setup the geometry shader unit if it is in use
* @param shader_engine the shader engine for the geometry shader to run
*/
void Setup(Shader::ShaderEngine* shader_engine);
/// Reconfigures the pipeline according to current register settings
void Reconfigure();
/// Checks if the pipeline needs a direct input from index buffer
bool NeedIndexInput() const;
/// Submits an index from index buffer. Call this only when NeedIndexInput returns true
void SubmitIndex(unsigned int val);
/// Submits vertex attributes output from vertex shader
void SubmitVertex(const Shader::AttributeBuffer& input);
private:
Shader::VertexHandler vertex_handler;
Shader::ShaderEngine* shader_engine;
std::unique_ptr<GeometryPipelineBackend> backend;
State& state;
};
} // namespace Pica
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