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Fix 4 bit images not being decoded correctly

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UnknownShadow200 2024-08-29 18:38:39 +10:00
parent aab9a6b383
commit b98a7afacd
1 changed files with 3 additions and 3 deletions
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6
src/Bitmap.c
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@ -172,9 +172,9 @@ static void Png_Reconstruct(cc_uint8 type, cc_uint8 bytesPerPixel, cc_uint8* lin
#define PNG_Mask_1(i) (7 - (i & 7))
#define PNG_Mask_2(i) ((3 - (i & 3)) * 2)
#define PNG_Mask_4(i) ((1 - (i & 1)) * 4)
#define PNG_Get__1(i) ((src[i >> 3] >> PNG_Mask_1(i)) & 1)
#define PNG_Get__2(i) ((src[i >> 2] >> PNG_Mask_2(i)) & 3)
#define PNG_Get__4(i) ((src[i >> 1] >> PNG_Mask_4(i)) & 7)
#define PNG_Get__1(i) ((src[i >> 3] >> PNG_Mask_1(i)) & 0x01)
#define PNG_Get__2(i) ((src[i >> 2] >> PNG_Mask_2(i)) & 0x03)
#define PNG_Get__4(i) ((src[i >> 1] >> PNG_Mask_4(i)) & 0x0F)
static void Png_Expand_GRAYSCALE_1(int width, BitmapCol* palette, cc_uint8* src, BitmapCol* dst) {
int i; cc_uint8 rgb; /* NOTE: not optimised*/