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| author | Chris Young <chris@unsatisfactorysoftware.co.uk> | 2012-08-12 11:02:12 +0100 |
|---|---|---|
| committer | Chris Young <chris@unsatisfactorysoftware.co.uk> | 2012-08-12 11:02:12 +0100 |
| commit | 8b31fc0e7880fed1da176c996fdf5acd5b63d8fb (patch) | |
| tree | 9872e40787f7a2c92d27ff1f389155216376e8d5 /amiga/bitmap.c | |
| parent | 59784ba8528182089c77e710f5ff31b3c78d6dc1 (diff) | |
| download | netsurf-8b31fc0e7880fed1da176c996fdf5acd5b63d8fb.tar.gz netsurf-8b31fc0e7880fed1da176c996fdf5acd5b63d8fb.tar.bz2 | |
Fix mask calculation (thanks to Fredrik Wikstrom)
Diffstat (limited to 'amiga/bitmap.c')
| -rw-r--r-- | amiga/bitmap.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/amiga/bitmap.c b/amiga/bitmap.c index 97e00f302..ee1506525 100644 --- a/amiga/bitmap.c +++ b/amiga/bitmap.c @@ -478,24 +478,24 @@ PLANEPTR ami_bitmap_get_mask(struct bitmap *bitmap, int width, uint32 *bmi = (uint32 *) bitmap->pixdata; UBYTE maskbit = 0; ULONG bm_width; - int y, x, w; + int y, x, bpr; if((height != bitmap->height) || (width != bitmap->width)) return NULL; if(bitmap_get_opaque(bitmap) == true) return NULL; if(bitmap->native_mask) return bitmap->native_mask; bm_width = GetBitMapAttr(n_bm, BMA_WIDTH); + bpr = RASSIZE(bm_width, 1); bitmap->native_mask = AllocRaster(bm_width, height); - - int bpr = RASSIZE(bm_width, 1); + SetMem(bitmap->native_mask, 0, bpr * height); for(y=0; y<height; y++) { for(x=0; x<width; x++) { if ((*bmi & 0x000000ffU) <= (ULONG)nsoption_int(mask_alpha)) maskbit = 0; else maskbit = 1; bmi++; - bitmap->native_mask[(y*bpr) + (x/8)] = - (bitmap->native_mask[(y*bpr) + (x/8)] << 1) | maskbit; + bitmap->native_mask[(y*bpr) + (x/8)] |= + maskbit << (7 - (x % 8)); } } |