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clutter/stage: Fix capturing scaled views

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Make clutter_stage_capture() work if views are scaled. This needs
adaptations on the using side to deal with the cairo surface device
scale that is used to communicate the scale used when capturing.

https://bugzilla.gnome.org/show_bug.cgi?id=765011
This commit is contained in:
Jonas Ådahl 2017-06-07 14:49:08 +08:00
parent 3e8d0204bd
commit fef81cd628
1 changed files with 9 additions and 4 deletions
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13
clutter/clutter/clutter-stage.c
View file

@ -4720,6 +4720,7 @@ capture_view (ClutterStage *stage,
int stride;
CoglBitmap *bitmap;
cairo_rectangle_int_t view_layout;
float view_scale;
framebuffer = clutter_stage_view_get_framebuffer (view);
@ -4730,8 +4731,11 @@ capture_view (ClutterStage *stage,
clutter_stage_do_paint_view (stage, view, rect);
}
view_scale = clutter_stage_view_get_scale (view);
image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
rect->width, rect->height);
rect->width * view_scale,
rect->height * view_scale);
cairo_surface_set_device_scale (image, view_scale, view_scale);
data = cairo_image_surface_get_data (image);
stride = cairo_image_surface_get_stride (image);
@ -4739,7 +4743,8 @@ capture_view (ClutterStage *stage,
backend = clutter_get_default_backend ();
context = clutter_backend_get_cogl_context (backend);
bitmap = cogl_bitmap_new_for_data (context,
rect->width, rect->height,
rect->width * view_scale,
rect->height * view_scale,
CLUTTER_CAIRO_FORMAT_ARGB32,
stride,
data);
@ -4747,8 +4752,8 @@ capture_view (ClutterStage *stage,
clutter_stage_view_get_layout (view, &view_layout);
cogl_framebuffer_read_pixels_into_bitmap (framebuffer,
rect->x - view_layout.x,
rect->y - view_layout.y,
(rect->x - view_layout.x) * view_scale,
(rect->y - view_layout.y) * view_scale,
COGL_READ_PIXELS_COLOR_BUFFER,
bitmap);