1 files changed, 48 insertions, 0 deletions

diff --git a/src/video_core/swrasterizer/rasterizer.h b/src/video_core/swrasterizer/rasterizer.h
new file mode 100644
index 000000000..3a72ac343
--- /dev/null
+++ b/src/video_core/swrasterizer/rasterizer.h
@@ -0,0 +1,48 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "video_core/shader/shader.h"
+
+namespace Pica {
+
+namespace Rasterizer {
+
+struct Vertex : Shader::OutputVertex {
+    Vertex(const OutputVertex& v) : OutputVertex(v) {}
+
+    // Attributes used to store intermediate results
+    // position after perspective divide
+    Math::Vec3<float24> screenpos;
+
+    // Linear interpolation
+    // factor: 0=this, 1=vtx
+    void Lerp(float24 factor, const Vertex& vtx) {
+        pos = pos * factor + vtx.pos * (float24::FromFloat32(1) - factor);
+
+        // TODO: Should perform perspective correct interpolation here...
+        tc0 = tc0 * factor + vtx.tc0 * (float24::FromFloat32(1) - factor);
+        tc1 = tc1 * factor + vtx.tc1 * (float24::FromFloat32(1) - factor);
+        tc2 = tc2 * factor + vtx.tc2 * (float24::FromFloat32(1) - factor);
+
+        screenpos = screenpos * factor + vtx.screenpos * (float24::FromFloat32(1) - factor);
+
+        color = color * factor + vtx.color * (float24::FromFloat32(1) - factor);
+    }
+
+    // Linear interpolation
+    // factor: 0=v0, 1=v1
+    static Vertex Lerp(float24 factor, const Vertex& v0, const Vertex& v1) {
+        Vertex ret = v0;
+        ret.Lerp(factor, v1);
+        return ret;
+    }
+};
+
+void ProcessTriangle(const Vertex& v0, const Vertex& v1, const Vertex& v2);
+
+} // namespace Rasterizer
+
+} // namespace Pica