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Added direct conversion from PA to P #6509

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merged 1 commit into from
Aug 17, 2022
Merged

Added direct conversion from PA to P #6509

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14 changes: 14 additions & 0 deletions src/libImaging/Convert.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1026,6 +1026,14 @@ pa2l(UINT8 *out, const UINT8 *in, int xsize, ImagingPalette palette) {
}
}

static void
pa2p(UINT8 *out, const UINT8 *in, int xsize, ImagingPalette palette) {
int x;
for (x = 0; x < xsize; x++, in += 4) {
*out++ = in[0];
}
}

static void
p2pa(UINT8 *out, const UINT8 *in, int xsize, ImagingPalette palette) {
int x;
Expand Down Expand Up @@ -1209,6 +1217,8 @@ frompalette(Imaging imOut, Imaging imIn, const char *mode) {
convert = alpha ? pa2l : p2l;
} else if (strcmp(mode, "LA") == 0) {
convert = alpha ? pa2la : p2la;
} else if (strcmp(mode, "P") == 0) {
convert = pa2p;
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Strange that Codecov doesn't think this is tested - when I run the test suite on my local machine, it is tested by test_image_convert.py's test_sanity.

} else if (strcmp(mode, "PA") == 0) {
convert = p2pa;
} else if (strcmp(mode, "I") == 0) {
Expand All @@ -1233,6 +1243,10 @@ frompalette(Imaging imOut, Imaging imIn, const char *mode) {
if (!imOut) {
return NULL;
}
if (strcmp(mode, "P") == 0) {
ImagingPaletteDelete(imOut->palette);
imOut->palette = ImagingPaletteDuplicate(imIn->palette);
}

ImagingSectionEnter(&cookie);
for (y = 0; y < imIn->ysize; y++) {
Expand Down