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9844bdbf7a
This allows us to use the GstVideoOverlayComposition API and correctly handle pre-multiplied alpha, while also only doing the alpha conversion once instead of twice for the whole frame. At a later point we can attach the meta to the buffer instead of blending ourselves if downstream supports that. https://bugzilla.gnome.org/show_bug.cgi?id=797091
59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/* GStreamer
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* Copyright (C) <2011> Jon Nordby <jononor@gmail.com>
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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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_CAIRO_OVERLAY_H__
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#define __GST_CAIRO_OVERLAY_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/video/gstvideofilter.h>
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#include <cairo.h>
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#include <cairo-gobject.h>
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G_BEGIN_DECLS
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#define GST_TYPE_CAIRO_OVERLAY \
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(gst_cairo_overlay_get_type())
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#define GST_CAIRO_OVERLAY(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CAIRO_OVERLAY,GstCairoOverlay))
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#define GST_CAIRO_OVERLAY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CAIRO_OVERLAY,GstCairoOverlayClass))
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#define GST_IS_CAIRO_OVERLAY(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CAIRO_OVERLAY))
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#define GST_IS_CAIRO_OVERLAY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CAIRO_OVERLAY))
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typedef struct _GstCairoOverlay GstCairoOverlay;
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typedef struct _GstCairoOverlayClass GstCairoOverlayClass;
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struct _GstCairoOverlay {
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GstVideoFilter video_filter;
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gboolean draw_on_transparent_surface;
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};
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struct _GstCairoOverlayClass {
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GstVideoFilterClass video_filter_class;
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};
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GType gst_cairo_overlay_get_type (void);
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G_END_DECLS
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#endif /* __GST_CAIRO_OVERLAY_H__ */
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