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clutter/cogl: Transform swap buffers regions into onscreen coordinates

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Those are given in view coordinates, so we must transform into onscreen
coordinates in order to perform swap_buffers on the right damage regions.

https://bugzilla.gnome.org/show_bug.cgi?id=745079
This commit is contained in:
Carlos Garnacho 2016-08-08 12:42:44 +02:00
parent 61e9c5c357
commit a6e15e841b
1 changed files with 43 additions and 0 deletions
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43
clutter/clutter/cogl/clutter-stage-cogl.c
View File

@ -37,6 +37,7 @@
#include "clutter-stage-cogl.h"
#include <stdlib.h>
#include <math.h>
#include "clutter-actor-private.h"
#include "clutter-backend-private.h"
@ -444,6 +445,42 @@ fill_current_damage_history_and_step (ClutterStageView *view)
view_priv->damage_index++;
}
static void
transform_swap_region_to_onscreen (ClutterStageView *view,
cairo_rectangle_int_t *swap_region)
{
CoglFramebuffer *framebuffer;
cairo_rectangle_int_t layout;
gfloat x1, y1, x2, y2;
gint width, height;
framebuffer = clutter_stage_view_get_onscreen (view);
clutter_stage_view_get_layout (view, &layout);
x1 = (float) swap_region->x / layout.width;
y1 = (float) swap_region->y / layout.height;
x2 = (float) (swap_region->x + swap_region->width) / layout.width;
y2 = (float) (swap_region->y + swap_region->height) / layout.height;
clutter_stage_view_transform_to_onscreen (view, &x1, &y1);
clutter_stage_view_transform_to_onscreen (view, &x2, &y2);
width = cogl_framebuffer_get_width (framebuffer);
height = cogl_framebuffer_get_height (framebuffer);
x1 = floor (x1 * width);
y1 = floor (height - (y1 * height));
x2 = ceil (x2 * width);
y2 = ceil (height - (y2 * height));
*swap_region = (cairo_rectangle_int_t) {
.x = x1,
.y = y1,
.width = x2 - x1,
.height = y2 - y1
};
}
static gboolean
clutter_stage_cogl_redraw_view (ClutterStageWindow *stage_window,
ClutterStageView *view)
@ -714,6 +751,12 @@ clutter_stage_cogl_redraw_view (ClutterStageWindow *stage_window,
if (do_swap_buffer)
{
if (clutter_stage_view_get_onscreen (view) !=
clutter_stage_view_get_framebuffer (view))
{
transform_swap_region_to_onscreen (view, &swap_region);
}
return swap_framebuffer (stage_window,
view,
&swap_region,