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SwRasterizer: implement custom clip plane
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@ -5,10 +5,10 @@
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#pragma once
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#include <array>
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#include "common/bit_field.h"
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#include "common/common_funcs.h"
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#include "common/common_types.h"
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#include "video_core/pica_types.h"
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namespace Pica {
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@ -31,7 +31,17 @@ struct RasterizerRegs {
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BitField<0, 24, u32> viewport_size_y;
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INSERT_PADDING_WORDS(0x9);
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INSERT_PADDING_WORDS(0x3);
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BitField<0, 1, u32> clip_enable;
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BitField<0, 24, u32> clip_coef[4]; // float24
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Math::Vec4<float24> GetClipCoef() const {
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return {float24::FromRaw(clip_coef[0]), float24::FromRaw(clip_coef[1]),
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float24::FromRaw(clip_coef[2]), float24::FromRaw(clip_coef[3])};
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}
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INSERT_PADDING_WORDS(0x1);
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BitField<0, 24, u32> viewport_depth_range; // float24
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BitField<0, 24, u32> viewport_depth_near_plane; // float24
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@ -127,8 +127,7 @@ void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const Outpu
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// Simple implementation of the Sutherland-Hodgman clipping algorithm.
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// TODO: Make this less inefficient (currently lots of useless buffering overhead happens here)
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for (auto edge : clipping_edges) {
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auto Clip = [&](const ClippingEdge& edge) {
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std::swap(input_list, output_list);
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output_list->clear();
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@ -147,12 +146,24 @@ void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const Outpu
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}
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reference_vertex = &vertex;
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}
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};
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for (auto edge : clipping_edges) {
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Clip(edge);
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// Need to have at least a full triangle to continue...
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if (output_list->size() < 3)
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return;
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}
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if (g_state.regs.rasterizer.clip_enable) {
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ClippingEdge custom_edge{-g_state.regs.rasterizer.GetClipCoef()};
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Clip(custom_edge);
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if (output_list->size() < 3)
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return;
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}
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InitScreenCoordinates((*output_list)[0]);
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InitScreenCoordinates((*output_list)[1]);
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