SWRasterizer: Move texturing functions to their own file

src/video_core/swrasterizer/texturing.h

@@ -0,0 +1,28 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "common/vector_math.h"
+#include "video_core/regs_texturing.h"
+
+namespace Pica {
+namespace Rasterizer {
+
+int GetWrappedTexCoord(TexturingRegs::TextureConfig::WrapMode mode, int val, unsigned size);
+
+Math::Vec3<u8> GetColorModifier(TexturingRegs::TevStageConfig::ColorModifier factor,
+                                const Math::Vec4<u8>& values);
+
+u8 GetAlphaModifier(TexturingRegs::TevStageConfig::AlphaModifier factor,
+                    const Math::Vec4<u8>& values);
+
+Math::Vec3<u8> ColorCombine(TexturingRegs::TevStageConfig::Operation op,
+                            const Math::Vec3<u8> input[3]);
+
+u8 AlphaCombine(TexturingRegs::TevStageConfig::Operation op, const std::array<u8, 3>& input);
+
+} // namespace Rasterizer
+} // namespace Pica