Camera
/* $Id$ */
/* Copyright (c) 2013-2020 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Camera */
/* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY ITS AUTHORS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#include <System.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "overlay.h"
/* CameraOverlay */
/* protected */
/* types */
struct _CameraOverlay
{
GdkPixbuf * pixbuf;
int width;
int height;
int opacity;
};
/* public */
/* functions */
/* cameraoverlay_new */
CameraOverlay * cameraoverlay_new(char const * filename, int opacity)
{
CameraOverlay * overlay;
GError * error = NULL;
if((overlay = object_new(sizeof(*overlay))) == NULL)
return NULL;
if((overlay->pixbuf = gdk_pixbuf_new_from_file(filename, &error))
== NULL)
{
error_set("%s", error->message);
g_error_free(error);
cameraoverlay_delete(overlay);
return NULL;
}
overlay->width = gdk_pixbuf_get_width(overlay->pixbuf);
overlay->height = gdk_pixbuf_get_height(overlay->pixbuf);
overlay->opacity = opacity;
return overlay;
}
/* cameraoverlay_delete */
void cameraoverlay_delete(CameraOverlay * overlay)
{
if(overlay->pixbuf != NULL)
g_object_unref(overlay->pixbuf);
object_delete(overlay);
}
/* accessors */
/* cameraoverlay_get_opacity */
int cameraoverlay_get_opacity(CameraOverlay * overlay)
{
return overlay->opacity;
}
/* cameraoverlay_set_opacity */
void cameraoverlay_set_opacity(CameraOverlay * overlay, int opacity)
{
overlay->opacity = opacity;
}
/* useful */
void cameraoverlay_blit(CameraOverlay * overlay, GdkPixbuf * dest)
{
int width = gdk_pixbuf_get_width(dest);
int height = gdk_pixbuf_get_height(dest);
gdouble wratio = width;
gdouble hratio = height;
wratio /= overlay->width;
hratio /= overlay->height;
gdk_pixbuf_composite(overlay->pixbuf, dest, 0, 0,
width, height, 0, 0, wratio, hratio,
GDK_INTERP_BILINEAR, overlay->opacity);
}