pica/swrasterizer: implement procedural texture

src/video_core/swrasterizer/proctex.h

@@ -0,0 +1,16 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/common_types.h"
+#include "common/vector_math.h"
+#include "video_core/pica_state.h"
+
+namespace Pica {
+namespace Rasterizer {
+
+/// Generates procedural texture color for the given coordinates
+Math::Vec4<u8> ProcTex(float u, float v, TexturingRegs regs, State::ProcTex state);
+
+} // namespace Rasterizer
+} // namespace Pica