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/*
* Copyright (C) 2014 ~ 2018 Deepin Technology Co., Ltd.
*
* Author: jouyouyun <jouyouwen717@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <glib.h>
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#include <X11/Xlib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk-pixbuf-xlib/gdk-pixbuf-xlib.h>
#include "gdk_pixbuf_utils.h"
int init_gdk_xlib() {
XInitThreads(); /* should be called before gdk_init() */
if (!init_gdk()) {
return FALSE;
}
gdk_pixbuf_xlib_init(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), 0);
return TRUE;
}
int init_gdk() {
return gdk_init_check(NULL, NULL);
}
const char *get_image_format(const char *img_file) {
GdkPixbufFormat *format = gdk_pixbuf_get_file_info(img_file, NULL, NULL);
if (format) {
return (char *)gdk_pixbuf_format_get_name(format);
}
return NULL;
}
int get_image_size(const char *img_file, int *width, int *height) {
GdkPixbufFormat *format = gdk_pixbuf_get_file_info(img_file, width, height);
if (format) {
return TRUE;
}
return FALSE;
}
int get_dominant_color(const GdkPixbuf *pixbuf, double *r, double *g, double *b) {
if (pixbuf == NULL) {
g_warning("pixbuf is NULL\n");
return FALSE;
}
guint length = 0;
guchar *pixels = gdk_pixbuf_get_pixels_with_length(pixbuf, &length);
if (length == 0) {
g_warning("zero length of pixbuf\n");
return FALSE;
}
// calculate dominant color of pixbuf
long long sum_r = 0;
long long sum_g = 0;
long long sum_b = 0;
long count = 0;
int skip = gdk_pixbuf_get_n_channels(pixbuf);
guint i = 0;
for (i=0; i<length; i += skip) {
if (skip == 4 && pixels[i+3] < 125) {
continue;
}
sum_r += pixels[i];
sum_g += pixels[i+1];
sum_b += pixels[i+2];
count++;
}
if (count == 0) {
g_warning("count is zero when calculating dominant color of pixbuf\n");
return FALSE;
}
*r = sum_r / count;
*g = sum_g / count;
*b = sum_b / count;
return TRUE;
}
int save(GdkPixbuf *pixbuf, const char *dest_file, const char *format) {
GError *err = NULL;
gdk_pixbuf_save (pixbuf, dest_file, format, &err, NULL);
if (err) {
g_debug("save gdk pixbuf to file failed: %s", err->message);
g_error_free(err);
return FALSE;
}
return TRUE;
}
GdkPixbuf *new_pixbuf_from_file(const char *img_file) {
GError *err = NULL;
GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(img_file, &err);
if (err) {
g_debug("new gdk pixbuf from file failed: %s", err->message);
g_error_free(err);
return NULL;
}
return pixbuf;
}
Pixmap convert_pixbuf_to_xpixmap(GdkPixbuf *pixbuf) {
Pixmap xpixmap = 0;
gdk_pixbuf_xlib_render_pixmap_and_mask(pixbuf, &xpixmap, NULL, 0);
return xpixmap;
}
GdkPixbuf *convert_xpixmap_to_pixbuf(const Pixmap xpixmap, int width, int height) {
return gdk_pixbuf_xlib_get_from_drawable(NULL, (Drawable)xpixmap,
xlib_rgb_get_cmap(),
xlib_rgb_get_visual(),
0, 0, 0, 0,
width, height);
}
GdkPixbuf *copy_area_simple(const GdkPixbuf *src_pixbuf, int src_x, int src_y, int width, int height) {
GdkPixbuf *dest_pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(src_pixbuf),
8, width, height);
gdk_pixbuf_copy_area(src_pixbuf, src_x, src_y, width, height,
dest_pixbuf, 0, 0);
return dest_pixbuf;
}
GdkPixbuf *screenshot() {
GdkWindow *root;
GdkPixbuf *pixbuf;
root = gdk_get_default_root_window();
int width = gdk_window_get_width(root);
int height = gdk_window_get_height(root);
pixbuf = gdk_pixbuf_get_from_window(root, 0, 0, width, height);
return pixbuf;
}
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