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This commit is contained in:
Melissa LeBlanc-Williams 2023-08-08 13:07:50 -07:00
parent c9c7f02ba4
commit 5393bc4ed0
1 changed files with 4 additions and 4 deletions
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8
shared-module/bitmaptools/__init__.c
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@ -881,8 +881,8 @@ void common_hal_bitmaptools_alphablend(displayio_bitmap_t *dest, displayio_bitma
blend_source2 = skip_source2_index_none || *sptr2 != (uint8_t)skip_source2_index;
if (blend_source1 && blend_source2) {
// Premultiply by the alpha factor
int sca1 = *sptr1++ * ifactor1;
int sca2 = *sptr2++ * ifactor2;
int sca1 = *sptr1++ *ifactor1;
int sca2 = *sptr2++ *ifactor2;
// Blend
int blend;
if (blendmode == BITMAPTOOLS_BLENDMODE_SCREEN) {
@ -894,10 +894,10 @@ void common_hal_bitmaptools_alphablend(displayio_bitmap_t *dest, displayio_bitma
pixel = (blend / (256 * ifactor1 + 256 * ifactor2 - ifactor1 * ifactor2));
} else if (blend_source1) {
// Apply iFactor1 to source1 only
pixel = *sptr1++ * ifactor1 / 256;
pixel = *sptr1++ *ifactor1 / 256;
} else if (blend_source2) {
// Apply iFactor2 to source1 only
pixel = *sptr2++ * ifactor2 / 256;
pixel = *sptr2++ *ifactor2 / 256;
} else {
// Use the destination value
pixel = *dptr;