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64 lines
2 KiB
C++
64 lines
2 KiB
C++
// Copyright 2014 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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#include "pica.h"
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#include "primitive_assembly.h"
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#include "vertex_shader.h"
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#include "video_core/debug_utils/debug_utils.h"
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namespace Pica {
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template<typename VertexType>
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PrimitiveAssembler<VertexType>::PrimitiveAssembler(Regs::TriangleTopology topology)
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: topology(topology), buffer_index(0) {
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}
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template<typename VertexType>
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void PrimitiveAssembler<VertexType>::SubmitVertex(VertexType& vtx, TriangleHandler triangle_handler)
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{
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switch (topology) {
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case Regs::TriangleTopology::List:
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case Regs::TriangleTopology::ListIndexed:
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if (buffer_index < 2) {
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buffer[buffer_index++] = vtx;
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} else {
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buffer_index = 0;
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triangle_handler(buffer[0], buffer[1], vtx);
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}
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break;
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case Regs::TriangleTopology::Strip:
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case Regs::TriangleTopology::Fan:
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if (strip_ready) {
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// TODO: Should be "buffer[0], buffer[1], vtx" instead!
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// Not quite sure why we need this order for things to show up properly.
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// Maybe a bug in the rasterizer?
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triangle_handler(buffer[1], buffer[0], vtx);
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}
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buffer[buffer_index] = vtx;
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if (topology == Regs::TriangleTopology::Strip) {
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strip_ready |= (buffer_index == 1);
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buffer_index = !buffer_index;
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} else if (topology == Regs::TriangleTopology::Fan) {
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buffer_index = 1;
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strip_ready = true;
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}
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break;
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default:
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LOG_ERROR(HW_GPU, "Unknown triangle topology %x:", (int)topology);
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break;
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}
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}
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// explicitly instantiate use cases
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template
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struct PrimitiveAssembler<VertexShader::OutputVertex>;
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template
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struct PrimitiveAssembler<DebugUtils::GeometryDumper::Vertex>;
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} // namespace
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