diff options
Diffstat (limited to 'sub/draw_bmp.c')
| -rw-r--r-- | sub/draw_bmp.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/sub/draw_bmp.c b/sub/draw_bmp.c index a4847b1534..0c913c86fd 100644 --- a/sub/draw_bmp.c +++ b/sub/draw_bmp.c @@ -148,10 +148,10 @@ static void unpremultiply_and_split_BGR32(struct mp_image *img, uint8_t *arow = &alpha->planes[0][alpha->stride[0] * y]; for (int x = 0; x < img->w; ++x) { uint32_t pval = irow[x]; - uint8_t aval = (pval >> 24); - uint8_t rval = (pval >> 16) & 0xFF; - uint8_t gval = (pval >> 8) & 0xFF; - uint8_t bval = pval & 0xFF; + uint32_t aval = (pval >> 24); + uint32_t rval = (pval >> 16) & 0xFF; + uint32_t gval = (pval >> 8) & 0xFF; + uint32_t bval = pval & 0xFF; // multiplied = separate * alpha / 255 // separate = rint(multiplied * 255 / alpha) // = floor(multiplied * 255 / alpha + 0.5) |