1 files changed, 400 insertions, 0 deletions
diff --git a/libdocument/ev-document-misc.c b/libdocument/ev-document-misc.c
new file mode 100644
index 00000000..d597127f
--- /dev/null
+++ b/libdocument/ev-document-misc.c
@@ -0,0 +1,400 @@
+/*
+ * Copyright (C) 2009 Juanjo Marín <[email protected]>
+ * Copyright (c) 2007 Carlos Garcia Campos <[email protected]>
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+
+#include <string.h>
+#include <math.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.
+ */
+static GdkPixbuf *
+create_thumbnail_frame (int width,
+ int height,
+ GdkPixbuf *source_pixbuf,
+ gboolean fill_bg)
+{
+ GdkPixbuf *retval;
+ guchar *data;
+ gint rowstride;
+ int i;
+ int width_r, height_r;
+
+ if (source_pixbuf)
+ g_return_val_if_fail (GDK_IS_PIXBUF (source_pixbuf), NULL);
+
+ if (source_pixbuf) {
+ width_r = gdk_pixbuf_get_width (source_pixbuf);
+ height_r = gdk_pixbuf_get_height (source_pixbuf);
+ } else {
+ width_r = width;
+ height_r = height;
+ }
+
+ /* make sure no one is passing us garbage */
+ g_assert (width_r >= 0 && height_r >= 0);
+
+ retval = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
+ TRUE, 8,
+ width_r + 4,
+ height_r + 4);
+
+ /* make it black and fill in the middle */
+ data = gdk_pixbuf_get_pixels (retval);
+ rowstride = gdk_pixbuf_get_rowstride (retval);
+
+ gdk_pixbuf_fill (retval, 0x000000ff);
+ if (fill_bg) {
+ for (i = 1; i < height_r + 1; i++)
+ memset (data + (rowstride * i) + 4, 0xffffffff, width_r * 4);
+ }
+
+ /* copy the source pixbuf */
+ if (source_pixbuf)
+ gdk_pixbuf_copy_area (source_pixbuf, 0, 0,
+ width_r,
+ height_r,
+ retval,
+ 1, 1);
+ /* Add the corner */
+ data [(width_r + 2) * 4 + 3] = 0;
+ data [(width_r + 3) * 4 + 3] = 0;
+ data [(width_r + 2) * 4 + (rowstride * 1) + 3] = 0;
+ data [(width_r + 3) * 4 + (rowstride * 1) + 3] = 0;
+
+ data [(height_r + 2) * rowstride + 3] = 0;
+ data [(height_r + 3) * rowstride + 3] = 0;
+ data [(height_r + 2) * rowstride + 4 + 3] = 0;
+ data [(height_r + 3) * rowstride + 4 + 3] = 0;
+
+ return retval;
+}
+
+GdkPixbuf *
+ev_document_misc_get_thumbnail_frame (int width,
+ int height,
+ GdkPixbuf *source_pixbuf)
+{
+ return create_thumbnail_frame (width, height, source_pixbuf, TRUE);
+}
+
+GdkPixbuf *
+ev_document_misc_get_loading_thumbnail (int width,
+ int height,
+ gboolean inverted_colors)
+{
+ return create_thumbnail_frame (width, height, NULL, !inverted_colors);
+}
+
+void
+ev_document_misc_get_page_border_size (gint page_width,
+ gint page_height,
+ GtkBorder *border)
+{
+ g_assert (border);
+
+ border->left = 1;
+ border->top = 1;
+ if (page_width < 100) {
+ border->right = 2;
+ border->bottom = 2;
+ } else if (page_width < 500) {
+ border->right = 3;
+ border->bottom = 3;
+ } else {
+ border->right = 4;
+ border->bottom = 4;
+ }
+}
+
+
+void
+ev_document_misc_paint_one_page (cairo_t *cr,
+ GtkWidget *widget,
+ GdkRectangle *area,
+ GtkBorder *border,
+ gboolean highlight,
+ gboolean inverted_colors)
+{
+ GtkStyle *style = gtk_widget_get_style (widget);
+ GtkStateType state = gtk_widget_get_state (widget);
+
+ gdk_cairo_set_source_color (cr, highlight ? &style->text[state] : &style->dark[state]);
+ gdk_cairo_rectangle (cr, area);
+ cairo_fill (cr);
+
+ if (inverted_colors)
+ cairo_set_source_rgb (cr, 0, 0, 0);
+ else
+ cairo_set_source_rgb (cr, 1, 1, 1);
+ cairo_rectangle (cr,
+ area->x + border->left,
+ area->y + border->top,
+ area->width - (border->left + border->right),
+ area->height - (border->top + border->bottom));
+ cairo_fill (cr);
+
+ gdk_cairo_set_source_color (cr, &style->mid[state]);
+ cairo_rectangle (cr,
+ area->x,
+ area->y + area->height - (border->bottom - border->top),
+ border->bottom - border->top,
+ border->bottom - border->top);
+ cairo_fill (cr);
+
+ cairo_rectangle (cr,
+ area->x + area->width - (border->right - border->left),
+ area->y,
+ border->right - border->left,
+ border->right - border->left);
+ cairo_fill (cr);
+}
+
+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;
+}
+
+void
+ev_document_misc_invert_surface (cairo_surface_t *surface) {
+ cairo_t *cr;
+
+ cr = cairo_create (surface);
+
+ /* white + DIFFERENCE -> invert */
+ cairo_set_operator (cr, CAIRO_OPERATOR_DIFFERENCE);
+ cairo_set_source_rgb (cr, 1., 1., 1.);
+ cairo_paint(cr);
+ cairo_destroy (cr);
+}
+
+void
+ev_document_misc_invert_pixbuf (GdkPixbuf *pixbuf)
+{
+ guchar *data, *p;
+ guint width, height, x, y, rowstride, n_channels;
+
+ n_channels = gdk_pixbuf_get_n_channels (pixbuf);
+ g_assert (gdk_pixbuf_get_colorspace (pixbuf) == GDK_COLORSPACE_RGB);
+ g_assert (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8);
+
+ /* First grab a pointer to the raw pixel data. */
+ data = gdk_pixbuf_get_pixels (pixbuf);
+
+ /* Find the number of bytes per row (could be padded). */
+ rowstride = gdk_pixbuf_get_rowstride (pixbuf);
+
+ width = gdk_pixbuf_get_width (pixbuf);
+ height = gdk_pixbuf_get_height (pixbuf);
+ for (x = 0; x < width; x++) {
+ for (y = 0; y < height; y++) {
+ /* Calculate pixel's offset into the data array. */
+ p = data + x * n_channels + y * rowstride;
+ /* Change the RGB values*/
+ p[0] = 255 - p[0];
+ p[1] = 255 - p[1];
+ p[2] = 255 - p[2];
+ }
+ }
+}
+
+gdouble
+ev_document_misc_get_screen_dpi (GdkScreen *screen)
+{
+ gdouble dp, di;
+
+ /*diagonal in pixels*/
+ dp = hypot (gdk_screen_get_width (screen), gdk_screen_get_height (screen));
+
+ /*diagonal in inches*/
+ di = hypot (gdk_screen_get_width_mm(screen), gdk_screen_get_height_mm (screen)) / 25.4;
+
+ return (dp / di);
+}
+
+/* Returns a locale specific date and time representation */
+gchar *
+ev_document_misc_format_date (GTime utime)
+{
+ time_t time = (time_t) utime;
+ char s[256];
+ const char fmt_hack[] = "%c";
+ size_t len;
+#ifdef HAVE_LOCALTIME_R
+ struct tm t;
+ if (time == 0 || !localtime_r (&time, &t)) return NULL;
+ len = strftime (s, sizeof (s), fmt_hack, &t);
+#else
+ struct tm *t;
+ if (time == 0 || !(t = localtime (&time)) ) return NULL;
+ len = strftime (s, sizeof (s), fmt_hack, t);
+#endif
+
+ if (len == 0 || s[0] == '\0') return NULL;
+
+ return g_locale_to_utf8 (s, -1, NULL, NULL, NULL);
+}