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Fix crash when using XRender and restoring image from X (bug#44930)

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* src/dispextern.h (struct image): Add original dimension elements.
* src/image.c (image_set_transform): Store the original dimensions.
(image_get_x_image): If we're using transforms use the original
dimensions with XGetImage.
This commit is contained in:
Alan Third 2020-12-05 19:40:08 +00:00
parent de032d41c6
commit 62a6934af9
2 changed files with 13 additions and 0 deletions
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4
src/dispextern.h
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@ -3047,6 +3047,10 @@ struct image
# if !defined USE_CAIRO && defined HAVE_XRENDER
/* Picture versions of pixmap and mask for compositing. */
Picture picture, mask_picture;
/* We need to store the original image dimensions in case we have to
call XGetImage. */
int original_width, original_height;
# endif
#endif /* HAVE_X_WINDOWS */
#ifdef HAVE_NTGUI

9
src/image.c
View file

@ -2103,6 +2103,10 @@ image_set_transform (struct frame *f, struct image *img)
# if !defined USE_CAIRO && defined HAVE_XRENDER
if (!img->picture)
return;
/* Store the original dimensions as we'll overwrite them later. */
img->original_width = img->width;
img->original_height = img->height;
# endif
/* Determine size. */
@ -2930,6 +2934,11 @@ image_get_x_image (struct frame *f, struct image *img, bool mask_p)
if (ximg_in_img)
return ximg_in_img;
#ifdef HAVE_XRENDER
else if (img->picture)
return XGetImage (FRAME_X_DISPLAY (f), !mask_p ? img->pixmap : img->mask,
0, 0, img->original_width, img->original_height, ~0, ZPixmap);
#endif
else
return XGetImage (FRAME_X_DISPLAY (f), !mask_p ? img->pixmap : img->mask,
0, 0, img->width, img->height, ~0, ZPixmap);