98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/* $Id$ */
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/* Copyright (c) 2013 Pierre Pronchery <khorben@defora.org> */
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/* This file is part of DeforaOS Desktop Camera */
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/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <System.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "overlay.h"
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/* CameraOverlay */
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/* protected */
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/* types */
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struct _CameraOverlay
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{
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GdkPixbuf * pixbuf;
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int width;
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int height;
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int opacity;
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};
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/* public */
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/* functions */
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/* cameraoverlay_new */
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CameraOverlay * cameraoverlay_new(char const * filename, int opacity)
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{
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CameraOverlay * overlay;
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GError * error = NULL;
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if((overlay = object_new(sizeof(*overlay))) == NULL)
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return NULL;
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if((overlay->pixbuf = gdk_pixbuf_new_from_file(filename, &error))
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== NULL)
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{
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error_set("%s", error->message);
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g_error_free(error);
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cameraoverlay_delete(overlay);
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return NULL;
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}
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overlay->width = gdk_pixbuf_get_width(overlay->pixbuf);
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overlay->height = gdk_pixbuf_get_height(overlay->pixbuf);
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overlay->opacity = opacity;
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return overlay;
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}
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/* cameraoverlay_delete */
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void cameraoverlay_delete(CameraOverlay * overlay)
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{
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if(overlay->pixbuf != NULL)
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g_object_unref(overlay->pixbuf);
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object_delete(overlay);
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}
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/* accessors */
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/* cameraoverlay_get_opacity */
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int cameraoverlay_get_opacity(CameraOverlay * overlay)
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{
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return overlay->opacity;
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}
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/* cameraoverlay_set_opacity */
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void cameraoverlay_set_opacity(CameraOverlay * overlay, int opacity)
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{
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overlay->opacity = opacity;
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}
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/* useful */
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void cameraoverlay_blit(CameraOverlay * overlay, GdkPixbuf * dest)
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{
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int width = gdk_pixbuf_get_width(dest);
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int height = gdk_pixbuf_get_height(dest);
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gdouble wratio = width;
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gdouble hratio = height;
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wratio /= overlay->width;
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hratio /= overlay->height;
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gdk_pixbuf_composite(overlay->pixbuf, dest, 0, 0,
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width, height, 0, 0, wratio, hratio,
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GDK_INTERP_BILINEAR, overlay->opacity);
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}
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