suyu/src/video_core/primitive_assembly.cpp
Subv 7b33e163b9 GPU/PrimitiveAssembler: Fixed drawing triangle fans.
It was skipping the second vertex assignment and using uninitialized garbage when assembling the corresponding triangle.
2015-12-06 10:48:05 -05:00

62 lines
1.8 KiB
C++

// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/logging/log.h"
#include "video_core/pica.h"
#include "video_core/primitive_assembly.h"
#include "video_core/debug_utils/debug_utils.h"
#include "video_core/shader/shader_interpreter.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) {
// TODO: Figure out what's different with TriangleTopology::Shader.
case Regs::TriangleTopology::List:
case Regs::TriangleTopology::Shader:
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)
triangle_handler(buffer[0], buffer[1], vtx);
buffer[buffer_index] = vtx;
strip_ready |= (buffer_index == 1);
if (topology == Regs::TriangleTopology::Strip)
buffer_index = !buffer_index;
else if (topology == Regs::TriangleTopology::Fan)
buffer_index = 1;
break;
default:
LOG_ERROR(HW_GPU, "Unknown triangle topology %x:", (int)topology);
break;
}
}
// explicitly instantiate use cases
template
struct PrimitiveAssembler<Shader::OutputVertex>;
template
struct PrimitiveAssembler<DebugUtils::GeometryDumper::Vertex>;
} // namespace