diff options
Diffstat (limited to 'render/image.c')
| -rw-r--r-- | render/image.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/render/image.c b/render/image.c index 4b123040..2eb043a2 100644 --- a/render/image.c +++ b/render/image.c @@ -34,24 +34,24 @@ static void ImageCopyResampled(RrPixel32 *dst, RrPixel32 *src, gulong dstX, dstY, srcX, srcY; gulong srcX1, srcX2, srcY1, srcY2; gulong ratioX, ratioY; - + ratioX = (srcW << FRACTION) / dstW; ratioY = (srcH << FRACTION) / dstH; - + srcY2 = 0; for (dstY = 0; dstY < dstH; dstY++) { srcY1 = srcY2; srcY2 += ratioY; - + srcX2 = 0; for (dstX = 0; dstX < dstW; dstX++) { gulong red = 0, green = 0, blue = 0, alpha = 0; gulong portionX, portionY, portionXY, sumXY = 0; RrPixel32 pixel; - + srcX1 = srcX2; srcX2 += ratioX; - + for (srcY = srcY1; srcY < srcY2; srcY += (1UL << FRACTION)) { if (srcY == srcY1) { srcY = FLOOR(srcY); @@ -63,7 +63,7 @@ static void ImageCopyResampled(RrPixel32 *dst, RrPixel32 *src, portionY = srcY2 - srcY; else portionY = (1UL << FRACTION); - + for (srcX = srcX1; srcX < srcX2; srcX += (1UL << FRACTION)) { if (srcX == srcX1) { srcX = FLOOR(srcX); @@ -75,10 +75,10 @@ static void ImageCopyResampled(RrPixel32 *dst, RrPixel32 *src, portionX = srcX2 - srcX; else portionX = (1UL << FRACTION); - + portionXY = (portionX * portionY) >> FRACTION; sumXY += portionXY; - + pixel = *(src + (srcY >> FRACTION) * srcW + (srcX >> FRACTION)); red += ((pixel >> RrDefaultRedOffset) & 0xFF) @@ -91,13 +91,13 @@ static void ImageCopyResampled(RrPixel32 *dst, RrPixel32 *src, * portionXY; } } - + g_assert(sumXY != 0); red /= sumXY; green /= sumXY; blue /= sumXY; alpha /= sumXY; - + *dst++ = (red << RrDefaultRedOffset) | (green << RrDefaultGreenOffset) | (blue << RrDefaultBlueOffset) | |