mirror of https://git.h3cjp.net/H3cJP/citra.git
93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
// Copyright 2014 Citra Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <array>
|
|
#include <functional>
|
|
#include <boost/serialization/access.hpp>
|
|
#include <boost/serialization/array.hpp>
|
|
#include "video_core/pica/output_vertex.h"
|
|
#include "video_core/pica/regs_pipeline.h"
|
|
|
|
namespace Pica {
|
|
|
|
/**
|
|
* Utility class to build triangles from a series of vertices,
|
|
* according to a given triangle topology.
|
|
*/
|
|
struct PrimitiveAssembler {
|
|
using TriangleHandler =
|
|
std::function<void(const OutputVertex&, const OutputVertex&, const OutputVertex&)>;
|
|
|
|
explicit PrimitiveAssembler(
|
|
PipelineRegs::TriangleTopology topology = PipelineRegs::TriangleTopology::List);
|
|
|
|
/**
|
|
* Queues a vertex, builds primitives from the vertex queue according to the given
|
|
* triangle topology, and calls triangle_handler for each generated primitive.
|
|
* NOTE: We could specify the triangle handler in the constructor, but this way we can
|
|
* keep event and handler code next to each other.
|
|
*/
|
|
void SubmitVertex(const OutputVertex& vtx, const TriangleHandler& triangle_handler);
|
|
|
|
/**
|
|
* Invert the vertex order of the next triangle. Called by geometry shader emitter.
|
|
* This only takes effect for TriangleTopology::Shader.
|
|
*/
|
|
void SetWinding() noexcept {
|
|
winding = true;
|
|
}
|
|
|
|
/**
|
|
* Resets the internal state of the PrimitiveAssembler.
|
|
*/
|
|
void Reset() {
|
|
buffer_index = 0;
|
|
strip_ready = false;
|
|
winding = false;
|
|
}
|
|
|
|
/**
|
|
* Reconfigures the PrimitiveAssembler to use a different triangle topology.
|
|
*/
|
|
void Reconfigure(PipelineRegs::TriangleTopology topology) {
|
|
Reset();
|
|
this->topology = topology;
|
|
}
|
|
|
|
/**
|
|
* Returns whether the PrimitiveAssembler has an empty internal buffer.
|
|
*/
|
|
bool IsEmpty() const {
|
|
return buffer_index == 0 && !strip_ready;
|
|
}
|
|
|
|
/**
|
|
* Returns the current topology.
|
|
*/
|
|
PipelineRegs::TriangleTopology GetTopology() const {
|
|
return topology;
|
|
}
|
|
|
|
private:
|
|
PipelineRegs::TriangleTopology topology;
|
|
int buffer_index = 0;
|
|
std::array<OutputVertex, 2> buffer;
|
|
bool strip_ready = false;
|
|
bool winding = false;
|
|
|
|
template <class Archive>
|
|
void serialize(Archive& ar, const unsigned int version) {
|
|
ar& topology;
|
|
ar& buffer_index;
|
|
ar& buffer;
|
|
ar& strip_ready;
|
|
ar& winding;
|
|
}
|
|
friend class boost::serialization::access;
|
|
};
|
|
|
|
} // namespace Pica
|