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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "pica.h"
#include "primitive_assembly.h"
#include "vertex_shader.h"
#include "video_core/debug_utils/debug_utils.h"
namespace Pica {
template<typename VertexType>
PrimitiveAssembler<VertexType>::PrimitiveAssembler(Regs::TriangleTopology topology)
: topology(topology), buffer_index(0) {
}
template<typename VertexType>
void PrimitiveAssembler<VertexType>::SubmitVertex(VertexType& vtx, TriangleHandler triangle_handler)
{
switch (topology) {
case Regs::TriangleTopology::List:
case Regs::TriangleTopology::ListIndexed:
if (buffer_index < 2) {
buffer[buffer_index++] = vtx;
} else {
buffer_index = 0;
triangle_handler(buffer[0], buffer[1], vtx);
}
break;
case Regs::TriangleTopology::Strip:
case Regs::TriangleTopology::Fan:
if (strip_ready) {
// TODO: Should be "buffer[0], buffer[1], vtx" instead!
// Not quite sure why we need this order for things to show up properly.
// Maybe a bug in the rasterizer?
triangle_handler(buffer[1], buffer[0], vtx);
}
buffer[buffer_index] = vtx;
if (topology == Regs::TriangleTopology::Strip) {
strip_ready |= (buffer_index == 1);
buffer_index = !buffer_index;
} else if (topology == Regs::TriangleTopology::Fan) {
buffer_index = 1;
strip_ready = true;
}
break;
default:
LOG_ERROR(HW_GPU, "Unknown triangle topology %x:", (int)topology);
break;
}
}
// explicitly instantiate use cases
template
struct PrimitiveAssembler<VertexShader::OutputVertex>;
template
struct PrimitiveAssembler<DebugUtils::GeometryDumper::Vertex>;
} // namespace
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