gstreamer/ext/gdk_pixbuf/gstgdkpixbufoverlay.h
Tim-Philipp Müller b76595d67e gdkpixbufoverlay: add "positioning-mode" property to allow absolute positions
Set positioning-mode=pixels-absolute to allow positioning with
absolute coordinates, meaning negative x/y offsets will be
interpreted as being to the left/above the video frame instead
of being interpreted as relative to the right/bottom edge of
the video frame (which is a silly default, but that's how it is).

This means we can nicely slide images into and out of the frame,
see gdkpixbufoverlay-test.

https://bugzilla.gnome.org/show_bug.cgi?id=739566
2014-12-25 15:38:37 +00:00

91 lines
2.9 KiB
C

/* GStreamer GdkPixbuf overlay
* Copyright (C) 2012-2014 Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _GST_GDK_PIXBUF_OVERLAY_H_
#define _GST_GDK_PIXBUF_OVERLAY_H_
#include <gst/video/video.h>
#include <gst/video/gstvideofilter.h>
#include <gst/video/video-overlay-composition.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
G_BEGIN_DECLS
#define GST_TYPE_GDK_PIXBUF_OVERLAY (gst_gdk_pixbuf_overlay_get_type())
#define GST_GDK_PIXBUF_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GDK_PIXBUF_OVERLAY,GstGdkPixbufOverlay))
#define GST_GDK_PIXBUF_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GDK_PIXBUF_OVERLAY,GstGdkPixbufOverlayClass))
#define GST_IS_GDK_PIXBUF_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GDK_PIXBUF_OVERLAY))
#define GST_IS_GDK_PIXBUF_OVERLAY_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GDK_PIXBUF_OVERLAY))
typedef struct _GstGdkPixbufOverlay GstGdkPixbufOverlay;
typedef struct _GstGdkPixbufOverlayClass GstGdkPixbufOverlayClass;
typedef enum {
GST_GDK_PIXBUF_POSITIONING_PIXELS_RELATIVE_TO_EDGES,
GST_GDK_PIXBUF_POSITIONING_PIXELS_ABSOLUTE
} GstGdkPixbufPositioningMode;
/**
* GstGdkPixbufOverlay:
*
* The opaque element instance structure.
*/
struct _GstGdkPixbufOverlay
{
GstVideoFilter videofilter;
/* properties */
gchar * location;
/* pixbuf set via pixbuf property */
GdkPixbuf * pixbuf;
gint offset_x;
gint offset_y;
gdouble relative_x;
gdouble relative_y;
GstGdkPixbufPositioningMode positioning_mode;
gint overlay_width;
gint overlay_height;
gdouble alpha;
/* the loaded image, as BGRA/ARGB pixels, with GstVideoMeta */
GstBuffer * pixels; /* OBJECT_LOCK */
GstVideoOverlayComposition * comp;
/* render position or dimension has changed */
gboolean update_composition;
};
struct _GstGdkPixbufOverlayClass
{
GstVideoFilterClass videofilter_class;
};
GType gst_gdk_pixbuf_overlay_get_type (void);
G_END_DECLS
#endif