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Initialize offset memory for PyImagingPhotoPut.

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When using image mode "1" or "L" block.offset[3] is never initialized. In some use cases the block is passed to Tk_PhotoPutBlock (https://github.com/tcltk/tk/blob/master/generic/tkImgPhoto.c#L2752) and block.offset[3] is stored in alphaoffset which is later referenced.
This commit is contained in:
Nathaniel Quillin 2020-07-20 23:49:32 -07:00 committed by Andrew Murray
parent 8deaebd5e0
commit 1743ac4734
1 changed files with 1 additions and 1 deletions
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2
src/Tk/tkImaging.c
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@ -114,7 +114,7 @@ PyImagingPhotoPut(ClientData clientdata, Tcl_Interp* interp,
if (strcmp(im->mode, "1") == 0 || strcmp(im->mode, "L") == 0) {
block.pixelSize = 1;
block.offset[0] = block.offset[1] = block.offset[2] = 0;
block.offset[0] = block.offset[1] = block.offset[2] = block.offset[3] = 0;
} else if (strncmp(im->mode, "RGB", 3) == 0) {
block.pixelSize = 4;
block.offset[0] = 0;