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Fix loss of clarity with odd-sized centered image

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John Lindgren 2022-09-10 13:31:58 -04:00 committed by Simon Ser
parent bdeb891378
commit 605859cdd4
1 changed files with 7 additions and 2 deletions
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9
background-image.c
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@ -100,9 +100,14 @@ void render_background_image(cairo_t *cairo, cairo_surface_t *image,
break; break;
} }
case BACKGROUND_MODE_CENTER: case BACKGROUND_MODE_CENTER:
/*
* Align the unscaled image to integer pixel boundaries
* in order to prevent loss of clarity (this only matters
* for odd-sized images).
*/
cairo_set_source_surface(cairo, image, cairo_set_source_surface(cairo, image,
(double)buffer_width / 2 - width / 2, (int)((double)buffer_width / 2 - width / 2),
(double)buffer_height / 2 - height / 2); (int)((double)buffer_height / 2 - height / 2));
break; break;
case BACKGROUND_MODE_TILE: { case BACKGROUND_MODE_TILE: {
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image); cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image);