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author | D G Turner | 2011-10-10 01:54:33 +0100 |
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committer | D G Turner | 2012-04-08 03:28:58 +0100 |
commit | e1f95983923ffcb0624eef1fa6cf552eb54fe647 (patch) | |
tree | 579b26f9b2d61bab6aa92ab03e1c85f2bb46463c /graphics/yuv_to_rgb.cpp | |
parent | 93632681c0e23da9031c68785060f197100411a6 (diff) | |
download | scummvm-rg350-e1f95983923ffcb0624eef1fa6cf552eb54fe647.tar.gz scummvm-rg350-e1f95983923ffcb0624eef1fa6cf552eb54fe647.tar.bz2 scummvm-rg350-e1f95983923ffcb0624eef1fa6cf552eb54fe647.zip |
GRAPHICS: Add YUV410 to RGB Conversion Functions, required for SVQ1.
Thanks to clone2727 for these.
Diffstat (limited to 'graphics/yuv_to_rgb.cpp')
-rw-r--r-- | graphics/yuv_to_rgb.cpp | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/graphics/yuv_to_rgb.cpp b/graphics/yuv_to_rgb.cpp index ac7f217fee..e0af267106 100644 --- a/graphics/yuv_to_rgb.cpp +++ b/graphics/yuv_to_rgb.cpp @@ -300,4 +300,64 @@ void convertYUV420ToRGB(Graphics::Surface *dst, const byte *ySrc, const byte *uS convertYUV420ToRGB<uint32>((byte *)dst->pixels, dst->pitch, lookup, ySrc, uSrc, vSrc, yWidth, yHeight, yPitch, uvPitch); } +#define OUTPUT_4_PIXEL_COLUMN() \ + PUT_PIXEL(*ySrc, dstPtr); \ + PUT_PIXEL(*(ySrc + yPitch), dstPtr + dstPitch); \ + PUT_PIXEL(*(ySrc + (yPitch << 1)), dstPtr + dstPitch * 2); \ + PUT_PIXEL(*(ySrc + (yPitch * 3)), dstPtr + dstPitch * 3); \ + ySrc++; \ + dstPtr += sizeof(PixelInt) + +template<typename PixelInt> +void convertYUV410ToRGB(byte *dstPtr, int dstPitch, const YUVToRGBLookup *lookup, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch) { + int quarterHeight = yHeight >> 2; + int quarterWidth = yWidth >> 2; + + // Keep the tables in pointers here to avoid a dereference on each pixel + const int16 *Cr_r_tab = lookup->_colorTab; + const int16 *Cr_g_tab = Cr_r_tab + 256; + const int16 *Cb_g_tab = Cr_g_tab + 256; + const int16 *Cb_b_tab = Cb_g_tab + 256; + const uint32 *rgbToPix = lookup->_rgbToPix; + + for (int h = 0; h < quarterHeight; h++) { + for (int w = 0; w < quarterWidth; w++) { + register const uint32 *L; + + int16 cr_r = Cr_r_tab[*vSrc]; + int16 crb_g = Cr_g_tab[*vSrc] + Cb_g_tab[*uSrc]; + int16 cb_b = Cb_b_tab[*uSrc]; + ++uSrc; + ++vSrc; + + OUTPUT_4_PIXEL_COLUMN(); + OUTPUT_4_PIXEL_COLUMN(); + OUTPUT_4_PIXEL_COLUMN(); + OUTPUT_4_PIXEL_COLUMN(); + } + + dstPtr += dstPitch * 3; + ySrc += (yPitch << 2) - yWidth; + uSrc += uvPitch - quarterWidth; + vSrc += uvPitch - quarterWidth; + } +} + +void convertYUV410ToRGB(Graphics::Surface *dst, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch) { + // Sanity checks + assert(dst && dst->pixels); + assert(dst->format.bytesPerPixel == 2 || dst->format.bytesPerPixel == 4); + assert(ySrc && uSrc && vSrc); + assert((yWidth & 3) == 0); + assert((yHeight & 3) == 0); + + const YUVToRGBLookup *lookup = YUVToRGBMan.getLookup(dst->format); + + // Use a templated function to avoid an if check on every pixel + if (dst->format.bytesPerPixel == 2) + convertYUV410ToRGB<uint16>((byte *)dst->pixels, dst->pitch, lookup, ySrc, uSrc, vSrc, yWidth, yHeight, yPitch, uvPitch); + else + convertYUV410ToRGB<uint32>((byte *)dst->pixels, dst->pitch, lookup, ySrc, uSrc, vSrc, yWidth, yHeight, yPitch, uvPitch); +} + } // End of namespace Graphics |