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336 | /*
* Copyright (C) 2009 Juanjo Marín <juanj.marin@juntadeandalucia.es>
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <string.h>
#include <math.h>
#include <glib.h>
#include <ctk/ctk.h>
#include <cdk/cdkx.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;<--- The scope of the variable 'i' can be reduced. [+]The scope of the variable 'i' can be reduced. Warning: Be careful when fixing this message, especially when there are inner loops. Here is an example where cppcheck will write that the scope for 'i' can be reduced:
void f(int x)
{
int i = 0;
if (x) {
// it's safe to move 'int i = 0;' here
for (int n = 0; n < 10; ++n) {
// it is possible but not safe to move 'int i = 0;' here
do_something(&i);
}
}
}
When you see this message it is always safe to reduce the variable scope 1 level.
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_return_val_if_fail (width_r >= 0 && height_r >= 0, NULL);
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);<--- The 2nd memset() argument '0xffffffff' doesn't fit into an 'unsigned char'. [+]The 2nd memset() argument '0xffffffff' doesn't fit into an 'unsigned char'. The 2nd parameter is passed as an 'int', but the function fills the block of memory using the 'unsigned char' conversion of this value.
}
/* 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;
}
/**
* ev_document_misc_get_thumbnail_frame:
* @width: the desired width
* @height: the desired height
* @source_pixbuf: a #GdkPixbuf
*
* Returns: (transfer full): a #GdkPixbuf
*/
GdkPixbuf *
ev_document_misc_get_thumbnail_frame (int width,
int height,
GdkPixbuf *source_pixbuf)
{
return create_thumbnail_frame (width, height, source_pixbuf, TRUE);
}
/**
* ev_document_misc_get_loading_thumbnail:
* @width: the desired width
* @height: the desired height
* @inverted_colors: whether to invert colors
*
* Returns: (transfer full): a #GdkPixbuf
*/
GdkPixbuf *
ev_document_misc_get_loading_thumbnail (int width,
int height,
gboolean inverted_colors)
{
return create_thumbnail_frame (width, height, NULL, !inverted_colors);
}
cairo_surface_t *
ev_document_misc_surface_from_pixbuf (GdkPixbuf *pixbuf)
{
cairo_surface_t *surface;
cairo_t *cr;
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
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);
cdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
return surface;
}
/**
* ev_document_misc_pixbuf_from_surface:
* @surface: a #cairo_surface_t
*
* Returns: (transfer full): a #GdkPixbuf
*/
GdkPixbuf *
ev_document_misc_pixbuf_from_surface (cairo_surface_t *surface)
{
g_return_val_if_fail (surface, NULL);
return gdk_pixbuf_get_from_surface (surface,
0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (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_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);
}
cairo_rotate (cr, dest_rotation * G_PI / 180.0);
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_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_monitor_dpi (CdkMonitor *monitor)
{
CdkRectangle geometry;
int s;
gdouble dp, di;
cdk_monitor_get_geometry (monitor, &geometry);
s = cdk_monitor_get_scale_factor (monitor);
/*diagonal in pixels*/
dp = hypot (geometry.width * s, geometry.height * s);
/*diagonal in inches*/
di = hypot (cdk_monitor_get_width_mm(monitor), cdk_monitor_get_height_mm (monitor)) / 25.4;
return (dp / di);
}
/* Returns a locale specific date and time representation */
gchar *
ev_document_misc_format_date (gint64 utime)
{
GDateTime *date_time;
gchar *result = NULL;
date_time = g_date_time_new_from_unix_local (utime);
if (date_time != NULL) {
result = g_date_time_format (date_time, "%c");
g_date_time_unref (date_time);
}
return result;
}
void
ev_document_misc_get_pointer_position (CtkWidget *widget,
gint *x,
gint *y)
{
CdkSeat *seat;
CdkDevice *device_pointer;
CdkRectangle allocation;
if (x)
*x = -1;
if (y)
*y = -1;
if (!ctk_widget_get_realized (widget))
return;
seat = cdk_display_get_default_seat (ctk_widget_get_display (widget));
device_pointer = cdk_seat_get_pointer (seat);
cdk_window_get_device_position (ctk_widget_get_window (widget),
device_pointer,
x, y, NULL);
if (ctk_widget_get_has_window (widget))
return;
ctk_widget_get_allocation (widget, &allocation);
if (x)
*x -= allocation.x;
if (y)
*y -= allocation.y;
}
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