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clutter/stage-cogl: Cleanup the code for scissor region calculation

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Ignore the subpixel compensation when this value isn't set, and directly
set the passed rect.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/3
This commit is contained in:
Marco Trevisan (Treviño) 2019-03-01 02:52:00 +01:00
parent 8b09542fd9
commit 3d89b47757
1 changed files with 7 additions and 19 deletions
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26
clutter/clutter/cogl/clutter-stage-cogl.c
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@ -551,31 +551,19 @@ calculate_scissor_region (cairo_rectangle_int_t *fb_clip_region,
int fb_height,
cairo_rectangle_int_t *out_scissor_rect)
{
int scissor_x;
int scissor_y;
int scissor_width;
int scissor_height;
*out_scissor_rect = *fb_clip_region;
scissor_x = fb_clip_region->x;
scissor_y = fb_clip_region->y;
scissor_width = fb_clip_region->width;
scissor_height = fb_clip_region->height;
if (subpixel_compensation == 0)
return;
if (fb_clip_region->x > 0)
scissor_x += subpixel_compensation;
out_scissor_rect->x += subpixel_compensation;
if (fb_clip_region->y > 0)
scissor_y += subpixel_compensation;
out_scissor_rect->y += subpixel_compensation;
if (fb_clip_region->x + fb_clip_region->width < fb_width)
scissor_width -= 2 * subpixel_compensation;
out_scissor_rect->width -= 2 * subpixel_compensation;
if (fb_clip_region->y + fb_clip_region->height < fb_height)
scissor_height -= 2 * subpixel_compensation;
*out_scissor_rect = (cairo_rectangle_int_t) {
.x = scissor_x,
.y = scissor_y,
.width = scissor_width,
.height = scissor_height
};
out_scissor_rect->height -= 2 * subpixel_compensation;
}
static inline gboolean