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/*
* 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 "ev-document-misc.h"
#include <string.h>
#include <gtk/gtk.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,
GdkPixbuf *source_pixbuf)
{
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);
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;
}
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 (GdkDrawable *drawable,
GtkWidget *widget,
GdkRectangle *area,
GtkBorder *border,
gboolean highlight)
{
gdk_draw_rectangle (drawable,
highlight ?
widget->style->text_gc[widget->state] : widget->style->dark_gc[widget->state],
TRUE,
area->x,
area->y,
area->width,
area->height);
gdk_draw_rectangle (drawable,
widget->style->white_gc,
TRUE,
area->x + border->left,
area->y + border->top,
area->width - (border->left + border->right),
area->height - (border->top + border->bottom));
gdk_draw_rectangle (drawable,
widget->style->mid_gc[widget->state],
TRUE,
area->x,
area->y + area->height - (border->bottom - border->top),
border->bottom - border->top,
border->bottom - border->top);
gdk_draw_rectangle (drawable,
widget->style->mid_gc[widget->state],
TRUE,
area->x + area->width - (border->right - border->left),
area->y,
border->right - border->left,
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 (CAIRO_FORMAT_ARGB32,
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;
}
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_CONTENT_COLOR_ALPHA,
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);
}
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;
}
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