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authorYuri Kunde Schlesner <yuriks@yuriks.net>2014-12-23 13:59:07 +0100
committerYuri Kunde Schlesner <yuriks@yuriks.net>2014-12-29 05:08:10 +0100
commit2012e1420f90ea86ea6975f2005f05ecd304b0c4 (patch)
treef5480dbf05c0fda8a11ee1da284816739a234260 /src/video_core/rasterizer.cpp
parentClipper: Compact buffers on each clipping pass (diff)
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Diffstat (limited to 'src/video_core/rasterizer.cpp')
-rw-r--r--src/video_core/rasterizer.cpp31
1 files changed, 17 insertions, 14 deletions
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index df1f88c79..63da7104d 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -106,6 +106,14 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
int bias1 = IsRightSideOrFlatBottomEdge(vtxpos[1].xy(), vtxpos[2].xy(), vtxpos[0].xy()) ? -1 : 0;
int bias2 = IsRightSideOrFlatBottomEdge(vtxpos[2].xy(), vtxpos[0].xy(), vtxpos[1].xy()) ? -1 : 0;
+ const Math::Vec3<float24> w_inverse = Math::MakeVec(
+ float24::FromFloat32(1.0f) / v0.pos.w,
+ float24::FromFloat32(1.0f) / v1.pos.w,
+ float24::FromFloat32(1.0f) / v2.pos.w);
+
+ auto textures = registers.GetTextures();
+ auto tev_stages = registers.GetTevStages();
+
// TODO: Not sure if looping through x first might be faster
for (u16 y = min_y; y < max_y; y += 0x10) {
for (u16 x = min_x; x < max_x; x += 0x10) {
@@ -129,6 +137,11 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
if (w0 < 0 || w1 < 0 || w2 < 0)
continue;
+ auto baricentric_coordinates = Math::MakeVec(float24::FromFloat32(static_cast<float>(w0)),
+ float24::FromFloat32(static_cast<float>(w1)),
+ float24::FromFloat32(static_cast<float>(w2)));
+ float24 interpolated_w_inverse = float24::FromFloat32(1.0f) / Math::Dot(w_inverse, baricentric_coordinates);
+
// Perspective correct attribute interpolation:
// Attribute values cannot be calculated by simple linear interpolation since
// they are not linear in screen space. For example, when interpolating a
@@ -145,19 +158,9 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
//
// The generalization to three vertices is straightforward in baricentric coordinates.
auto GetInterpolatedAttribute = [&](float24 attr0, float24 attr1, float24 attr2) {
- auto attr_over_w = Math::MakeVec(attr0 / v0.pos.w,
- attr1 / v1.pos.w,
- attr2 / v2.pos.w);
- auto w_inverse = Math::MakeVec(float24::FromFloat32(1.f) / v0.pos.w,
- float24::FromFloat32(1.f) / v1.pos.w,
- float24::FromFloat32(1.f) / v2.pos.w);
- auto baricentric_coordinates = Math::MakeVec(float24::FromFloat32(static_cast<float>(w0)),
- float24::FromFloat32(static_cast<float>(w1)),
- float24::FromFloat32(static_cast<float>(w2)));
-
+ auto attr_over_w = Math::MakeVec(attr0, attr1, attr2) * w_inverse;
float24 interpolated_attr_over_w = Math::Dot(attr_over_w, baricentric_coordinates);
- float24 interpolated_w_inverse = Math::Dot(w_inverse, baricentric_coordinates);
- return interpolated_attr_over_w / interpolated_w_inverse;
+ return interpolated_attr_over_w * interpolated_w_inverse;
};
Math::Vec4<u8> primary_color{
@@ -177,7 +180,7 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
Math::Vec4<u8> texture_color[3]{};
for (int i = 0; i < 3; ++i) {
- auto texture = registers.GetTextures()[i];
+ const auto& texture = textures[i];
if (!texture.enabled)
continue;
@@ -219,7 +222,7 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
// with some basic arithmetic. Alpha combiners can be configured separately but work
// analogously.
Math::Vec4<u8> combiner_output;
- for (auto tev_stage : registers.GetTevStages()) {
+ for (const auto& tev_stage : tev_stages) {
using Source = Regs::TevStageConfig::Source;
using ColorModifier = Regs::TevStageConfig::ColorModifier;
using AlphaModifier = Regs::TevStageConfig::AlphaModifier;