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https://github.com/netsurf-browser/netsurf
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alignment attempt 2. this seems right, but doesn't work even for previously-working images
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@ -481,15 +481,17 @@ PLANEPTR ami_bitmap_get_mask(struct bitmap *bitmap, int width, int height)
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{
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uint32 *bmi = (uint32 *) bitmap->pixdata;
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UBYTE maskbit = 0;
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int y, x;
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int y, x, w;
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if((height != bitmap->height) || (width != bitmap->width)) return NULL;
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if(bitmap_get_opaque(bitmap) == true) return NULL;
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if(bitmap->native_mask) return bitmap->native_mask;
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bitmap->native_mask = AllocRaster(width, height);
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while((width % 8) != 0) width++;
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w = width / 8;
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if((width % 8) != 0) w++;
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for(int i=0; i<(height * (width / 8)); i++) {
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bitmap->native_mask[i] = 0;
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}
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@ -499,8 +501,8 @@ PLANEPTR ami_bitmap_get_mask(struct bitmap *bitmap, int width, int height)
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if ((*bmi & 0x000000ffU) <= (ULONG)nsoption_int(mask_alpha)) maskbit = 0;
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else maskbit = 1;
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bmi++;
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bitmap->native_mask[(y*(width/8)) + (x/8)] =
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(bitmap->native_mask[(y*(width/8)) + (x/8)] << 1) | maskbit;
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bitmap->native_mask[(y*w) + (x/8)] =
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(bitmap->native_mask[(y*w) + (x/8)] << 1) | maskbit;
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}
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}
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