ad5555bf42
A clutter actor might be painted on a stage view with a view scale other than 1. In this case, to show the content in full resolution, the actor must use a higher resolution resource (e.g. texture), which will be down scaled to the stage coordinate space, then scaled up again to the stage view framebuffer scale. Use a 'resource-scale' property to save information and notify when it changes. The resource scale is the ceiled value of the highest stage view scale a actor is visible on. The value is ceiled because using a higher resolution resource consistently results in better output quality. One reason for this is that rendering is often not perfectly pixel aligned, meaning even if we load a resource with a suitable size, due to us still scaling ever so slightly, the quality is affected. Using a higher resolution resource avoids this problem. For situations inside clutter where the actual maximum view scale is needed, a function _clutter_actor_get_real_resource_scale() is provided, which returns the non-ceiled value. Make sure we ignore resource scale computation requests during size requests or allocation while ensure we've proper resource-scale on pre-paint. https://bugzilla.gnome.org/show_bug.cgi?id=765011 https://gitlab.gnome.org/GNOME/mutter/merge_requests/3
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2016 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __CLUTTER_MUTTER_H__
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#define __CLUTTER_MUTTER_H__
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#define __CLUTTER_H_INSIDE__
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#include "clutter-backend.h"
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#include "clutter-macros.h"
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#include "clutter-stage-view.h"
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#include "cogl/clutter-stage-cogl.h"
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#include "x11/clutter-stage-x11.h"
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CLUTTER_EXPORT
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void clutter_set_custom_backend_func (ClutterBackend *(* func) (void));
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CLUTTER_EXPORT
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int64_t clutter_stage_get_frame_counter (ClutterStage *stage);
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CLUTTER_EXPORT
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void clutter_stage_capture_into (ClutterStage *stage,
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gboolean paint,
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cairo_rectangle_int_t *rect,
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uint8_t *data);
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CLUTTER_EXPORT
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void clutter_stage_freeze_updates (ClutterStage *stage);
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CLUTTER_EXPORT
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void clutter_stage_thaw_updates (ClutterStage *stage);
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CLUTTER_EXPORT
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void clutter_stage_update_resource_scales (ClutterStage *stage);
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CLUTTER_EXPORT
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gboolean clutter_actor_has_damage (ClutterActor *actor);
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#undef __CLUTTER_H_INSIDE__
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#endif /* __CLUTTER_MUTTER_H__ */
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