diff options
Diffstat (limited to 'src/effects/SkBlurImageFilter.cpp')
-rw-r--r-- | src/effects/SkBlurImageFilter.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/effects/SkBlurImageFilter.cpp b/src/effects/SkBlurImageFilter.cpp index a820152fb3..2b823bc98b 100644 --- a/src/effects/SkBlurImageFilter.cpp +++ b/src/effects/SkBlurImageFilter.cpp @@ -44,6 +44,10 @@ static void boxBlurX(const SkBitmap& src, SkBitmap* dst, int kernelSize, { int width = bounds.width(), height = bounds.height(); int rightBorder = SkMin32(rightOffset + 1, width); +#ifndef SK_DISABLE_BLUR_DIVISION_OPTIMIZATION + uint32_t scale = (1 << 24) / kernelSize; + uint32_t half = 1 << 23; +#endif for (int y = 0; y < height; ++y) { int sumA = 0, sumR = 0, sumG = 0, sumB = 0; SkPMColor* p = src.getAddr32(bounds.fLeft, y + bounds.fTop); @@ -58,10 +62,17 @@ static void boxBlurX(const SkBitmap& src, SkBitmap* dst, int kernelSize, const SkColor* sptr = src.getAddr32(bounds.fLeft, bounds.fTop + y); SkColor* dptr = dst->getAddr32(0, y); for (int x = 0; x < width; ++x) { +#ifndef SK_DISABLE_BLUR_DIVISION_OPTIMIZATION + *dptr = SkPackARGB32((sumA * scale + half) >> 24, + (sumR * scale + half) >> 24, + (sumG * scale + half) >> 24, + (sumB * scale + half) >> 24); +#else *dptr = SkPackARGB32(sumA / kernelSize, sumR / kernelSize, sumG / kernelSize, sumB / kernelSize); +#endif if (x >= leftOffset) { SkColor l = *(sptr - leftOffset); sumA -= SkGetPackedA32(l); @@ -89,6 +100,10 @@ static void boxBlurY(const SkBitmap& src, SkBitmap* dst, int kernelSize, int bottomBorder = SkMin32(bottomOffset + 1, height); int srcStride = src.rowBytesAsPixels(); int dstStride = dst->rowBytesAsPixels(); +#ifndef SK_DISABLE_BLUR_DIVISION_OPTIMIZATION + uint32_t scale = (1 << 24) / kernelSize; + uint32_t half = 1 << 23; +#endif for (int x = 0; x < width; ++x) { int sumA = 0, sumR = 0, sumG = 0, sumB = 0; SkColor* p = src.getAddr32(bounds.fLeft + x, bounds.fTop); @@ -103,10 +118,17 @@ static void boxBlurY(const SkBitmap& src, SkBitmap* dst, int kernelSize, const SkColor* sptr = src.getAddr32(bounds.fLeft + x, bounds.fTop); SkColor* dptr = dst->getAddr32(x, 0); for (int y = 0; y < height; ++y) { +#ifndef SK_DISABLE_BLUR_DIVISION_OPTIMIZATION + *dptr = SkPackARGB32((sumA * scale + half) >> 24, + (sumR * scale + half) >> 24, + (sumG * scale + half) >> 24, + (sumB * scale + half) >> 24); +#else *dptr = SkPackARGB32(sumA / kernelSize, sumR / kernelSize, sumG / kernelSize, sumB / kernelSize); +#endif if (y >= topOffset) { SkColor l = *(sptr - topOffset * srcStride); sumA -= SkGetPackedA32(l); |