gstreamer/ext/gdk_pixbuf/gstgdkpixbufoverlay.h
Mark Nauwelaerts 24b2422bf3 gdkpixbufoverlay: add a positioning coefficient pair
... so as to allow one clearly defined (absolute) positioning mode
that can cater for a variety of absolute but also relative positioning
with respect to edge or center.
2017-01-22 10:18:27 +01:00

94 lines
3 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;
gdouble coef_x;
gdouble coef_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