From dbaba0062a057836b31455d7abe3fea6a20b99d8 Mon Sep 17 00:00:00 2001 From: Stenzek Date: Sun, 24 Mar 2019 13:10:01 +1000 Subject: TextureDecoder: Move XFB decoding to Common This was previously missing for generic (which is used on ARM). --- Source/Core/VideoCommon/TextureDecoder_Common.cpp | 38 +++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'Source/Core/VideoCommon/TextureDecoder_Common.cpp') diff --git a/Source/Core/VideoCommon/TextureDecoder_Common.cpp b/Source/Core/VideoCommon/TextureDecoder_Common.cpp index 2e84e3d282..5fbe34a098 100644 --- a/Source/Core/VideoCommon/TextureDecoder_Common.cpp +++ b/Source/Core/VideoCommon/TextureDecoder_Common.cpp @@ -751,3 +751,41 @@ void TexDecoder_DecodeRGBA8FromTmem(u8* dst, const u8* src_ar, const u8* src_gb, } } } + +void TexDecoder_DecodeXFB(u8* dst, const u8* src, u32 width, u32 height, u32 stride) +{ + const u8* src_ptr = src; + u8* dst_ptr = dst; + + for (u32 y = 0; y < height; y++) + { + const u8* row_ptr = src_ptr; + for (u32 x = 0; x < width; x += 2) + { + // We do this one color sample (aka 2 RGB pixels) at a time + int Y1 = int(*(row_ptr++)) - 16; + int U = int(*(row_ptr++)) - 128; + int Y2 = int(*(row_ptr++)) - 16; + int V = int(*(row_ptr++)) - 128; + + // We do the inverse BT.601 conversion for YCbCr to RGB + // http://www.equasys.de/colorconversion.html#YCbCr-RGBColorFormatConversion + u8 R1 = static_cast(MathUtil::Clamp(int(1.164f * Y1 + 1.596f * V), 0, 255)); + u8 G1 = static_cast(MathUtil::Clamp(int(1.164f * Y1 - 0.392f * U - 0.813f * V), 0, 255)); + u8 B1 = static_cast(MathUtil::Clamp(int(1.164f * Y1 + 2.017f * U), 0, 255)); + + u8 R2 = static_cast(MathUtil::Clamp(int(1.164f * Y2 + 1.596f * V), 0, 255)); + u8 G2 = static_cast(MathUtil::Clamp(int(1.164f * Y2 - 0.392f * U - 0.813f * V), 0, 255)); + u8 B2 = static_cast(MathUtil::Clamp(int(1.164f * Y2 + 2.017f * U), 0, 255)); + + u32 rgba = 0xff000000 | B1 << 16 | G1 << 8 | R1; + std::memcpy(dst_ptr, &rgba, sizeof(rgba)); + dst_ptr += sizeof(rgba); + rgba = 0xff000000 | B2 << 16 | G2 << 8 | R2; + std::memcpy(dst_ptr, &rgba, sizeof(rgba)); + dst_ptr += sizeof(rgba); + } + + src_ptr += stride; + } +} -- cgit v1.2.3