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| author | Eugene Sandulenko | 2004-05-21 02:08:48 +0000 |
|---|---|---|
| committer | Eugene Sandulenko | 2004-05-21 02:08:48 +0000 |
| commit | d33b24036e7a0753a6de8a416c5c649f7ba84180 (patch) | |
| tree | 03ce5d46129d6731a81eb894a4ddfdd3902aab00 /common/scaler.cpp | |
| parent | 5464e0951bf5145faa6f4dbe54d012da2364ce27 (diff) | |
| download | scummvm-rg350-d33b24036e7a0753a6de8a416c5c649f7ba84180.tar.gz scummvm-rg350-d33b24036e7a0753a6de8a416c5c649f7ba84180.tar.bz2 scummvm-rg350-d33b24036e7a0753a6de8a416c5c649f7ba84180.zip | |
Added assembly versions of HQ2x and HQ3x scalers.
svn-id: r13844
Diffstat (limited to 'common/scaler.cpp')
| -rw-r--r-- | common/scaler.cpp | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/common/scaler.cpp b/common/scaler.cpp index bf5da84ca1..92d557fc7f 100644 --- a/common/scaler.cpp +++ b/common/scaler.cpp @@ -27,7 +27,22 @@ int gBitFormat = 565; // RGB-to-YUV lookup table -int RGBtoYUV[65536]; +extern "C" { + +#ifdef USE_NASM +// NOTE: if your compiler uses different mangled names, add another +// condition here + +#ifndef _MSC_VER +#define RGBtoYUV _RGBtoYUV +#define LUT16to32 _LUT16to32 +#endif + +#endif + +uint RGBtoYUV[65536]; +uint LUT16to32[65536]; +} static const uint16 dotmatrix_565[16] = { 0x01E0, 0x0007, 0x3800, 0x0000, @@ -63,6 +78,10 @@ void InitLUT(uint32 BitFormat) { int Y, u, v; int gInc, gShift; + for (int i = 0; i < 65536; i++) { + LUT16to32[i] = ((i & 0xF800) << 8) + ((i & 0x07E0) << 5) + ((i & 0x001F) << 3); + } + if (BitFormat == 565) { gInc = 256 >> 6; gShift = 6 - 3; @@ -76,8 +95,8 @@ void InitLUT(uint32 BitFormat) { for (b = 0; b < 256; b += 8) { Y = (r + g + b) >> 2; u = 128 + ((r - b) >> 2); - v = 128 + ((-r + 2 * g -b) >> 3); - RGBtoYUV[ (r << (5+gShift)) + (g << gShift) + (b >> 3) ] = (Y << 16) + (u << 8) + v; + v = 128 + ((-r + 2 * g - b) >> 3); + RGBtoYUV[ (r << (5 + gShift)) + (g << gShift) + (b >> 3) ] = (Y << 16) + (u << 8) + v; } } } |