+/*
+ * Copyright (c) 2007 Carlos Garcia Campos <carlosgc@gnome.org>
+ * Copyright (C) 2000-2003 Marco Pesenti Gritti
+ *
+ * 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 2, or (at your option)
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
-#include "ev-document-misc.h"
#include <string.h>
+
#include <gtk/gtk.h>
+#include "ev-document-misc.h"
+
/* Returns a new GdkPixbuf that is suitable for placing in the thumbnail view.
* It is four pixels wider and taller than the source. If source_pixbuf is not
* NULL, then it will fill the return pixbuf with the contents of
* source_pixbuf.
*/
-
GdkPixbuf *
ev_document_misc_get_thumbnail_frame (int width,
int height,
border->right - border->left);
}
+
+cairo_surface_t *
+ev_document_misc_surface_from_pixbuf (GdkPixbuf *pixbuf)
+{
+ cairo_surface_t *surface;
+ cairo_t *cr;
+
+ surface = cairo_image_surface_create (gdk_pixbuf_get_has_alpha (pixbuf) ?
+ CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
+ gdk_pixbuf_get_width (pixbuf),
+ gdk_pixbuf_get_height (pixbuf));
+ cr = cairo_create (surface);
+ gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
+ cairo_paint (cr);
+ cairo_destroy (cr);
+
+ return surface;
+}
+
+GdkPixbuf *
+ev_document_misc_pixbuf_from_surface (cairo_surface_t *surface)
+{
+ GdkPixbuf *pixbuf;
+ cairo_surface_t *image;
+ cairo_t *cr;
+ gboolean has_alpha;
+ gint width, height;
+ cairo_format_t surface_format;
+ gint pixbuf_n_channels;
+ gint pixbuf_rowstride;
+ guchar *pixbuf_pixels;
+ gint x, y;
+
+ width = cairo_image_surface_get_width (surface);
+ height = cairo_image_surface_get_height (surface);
+
+ surface_format = cairo_image_surface_get_format (surface);
+ has_alpha = (surface_format == CAIRO_FORMAT_ARGB32);
+
+ pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+ TRUE, 8,
+ width, height);
+ pixbuf_n_channels = gdk_pixbuf_get_n_channels (pixbuf);
+ pixbuf_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
+ pixbuf_pixels = gdk_pixbuf_get_pixels (pixbuf);
+
+ image = cairo_image_surface_create_for_data (pixbuf_pixels,
+ surface_format,
+ width, height,
+ pixbuf_rowstride);
+ cr = cairo_create (image);
+ cairo_set_source_surface (cr, surface, 0, 0);
+
+ if (has_alpha)
+ cairo_mask_surface (cr, surface, 0, 0);
+ else
+ cairo_paint (cr);
+
+ cairo_destroy (cr);
+ cairo_surface_destroy (image);
+
+ for (y = 0; y < height; y++) {
+ guchar *p = pixbuf_pixels + y * pixbuf_rowstride;
+
+ for (x = 0; x < width; x++) {
+ guchar tmp;
+
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+ tmp = p[0];
+ p[0] = p[2];
+ p[2] = tmp;
+ p[3] = (has_alpha) ? p[3] : 0xff;
+#else
+ tmp = p[0];
+ p[0] = p[1];
+ p[1] = p[2];
+ p[2] = p[3];
+ p[3] = (has_alpha) ? tmp : 0xff;
+#endif
+ p += pixbuf_n_channels;
+ }
+ }
+
+ return pixbuf;
+}
+
+cairo_surface_t *
+ev_document_misc_surface_rotate_and_scale (cairo_surface_t *surface,
+ gint dest_width,
+ gint dest_height,
+ gint dest_rotation)
+{
+ cairo_surface_t *new_surface;
+ cairo_t *cr;
+ gint width, height;
+ gint new_width = dest_width;
+ gint new_height = dest_height;
+
+ width = cairo_image_surface_get_width (surface);
+ height = cairo_image_surface_get_height (surface);
+
+ if (dest_width == width &&
+ dest_height == height &&
+ dest_rotation == 0) {
+ return cairo_surface_reference (surface);
+ }
+
+ if (dest_rotation == 90 || dest_rotation == 270) {
+ new_width = dest_height;
+ new_height = dest_width;
+ }
+
+ new_surface = cairo_surface_create_similar (surface,
+ cairo_surface_get_content (surface),
+ new_width, new_height);
+
+ cr = cairo_create (new_surface);
+ switch (dest_rotation) {
+ case 90:
+ cairo_translate (cr, new_width, 0);
+ break;
+ case 180:
+ cairo_translate (cr, new_width, new_height);
+ break;
+ case 270:
+ cairo_translate (cr, 0, new_height);
+ break;
+ default:
+ cairo_translate (cr, 0, 0);
+ }
+
+ if (dest_width != width || dest_height != height) {
+ cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_BILINEAR);
+ cairo_scale (cr,
+ (gdouble)dest_width / width,
+ (gdouble)dest_height / height);
+ }
+
+ cairo_rotate (cr, dest_rotation * G_PI / 180.0);
+ cairo_set_source_surface (cr, surface, 0, 0);
+ cairo_paint (cr);
+ cairo_destroy (cr);
+
+ return new_surface;
+}
+
https://www.fi.muni.cz/~kas/git / evince.git / blobdiff