/* Copyright (C) 2016 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see .
*/
#include "config.h"
#include
#include "gdkpixbufutilsprivate.h"
static GdkPixbuf *
load_from_stream (GdkPixbufLoader *loader,
GInputStream *stream,
GCancellable *cancellable,
GError **error)
{
GdkPixbuf *pixbuf;
gssize n_read;
guchar buffer[65536];
gboolean res;
res = TRUE;
while (1)
{
n_read = g_input_stream_read (stream, buffer, sizeof (buffer), cancellable, error);
if (n_read < 0)
{
res = FALSE;
error = NULL; /* Ignore further errors */
break;
}
if (n_read == 0)
break;
if (!gdk_pixbuf_loader_write (loader, buffer, n_read, error))
{
res = FALSE;
error = NULL;
break;
}
}
if (!gdk_pixbuf_loader_close (loader, error))
{
res = FALSE;
error = NULL;
}
pixbuf = NULL;
if (res)
{
pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
if (pixbuf)
g_object_ref (pixbuf);
}
return pixbuf;
}
static void
size_prepared_cb (GdkPixbufLoader *loader,
gint width,
gint height,
gpointer data)
{
gdouble *scale = data;
width = MAX (*scale * width, 1);
height = MAX (*scale * height, 1);
gdk_pixbuf_loader_set_size (loader, width, height);
}
/* Like gdk_pixbuf_new_from_stream_at_scale, but
* load the image at its original size times the
* given scale.
*/
GdkPixbuf *
_gdk_pixbuf_new_from_stream_scaled (GInputStream *stream,
gdouble scale,
GCancellable *cancellable,
GError **error)
{
GdkPixbufLoader *loader;
GdkPixbuf *pixbuf;
loader = gdk_pixbuf_loader_new ();
g_signal_connect (loader, "size-prepared",
G_CALLBACK (size_prepared_cb), &scale);
pixbuf = load_from_stream (loader, stream, cancellable, error);
g_object_unref (loader);
return pixbuf;
}
/* Like gdk_pixbuf_new_from_resource_at_scale, but
* load the image at its original size times the
* given scale.
*/
GdkPixbuf *
_gdk_pixbuf_new_from_resource_scaled (const gchar *resource_path,
gdouble scale,
GError **error)
{
GInputStream *stream;
GdkPixbuf *pixbuf;
stream = g_resources_open_stream (resource_path, 0, error);
if (stream == NULL)
return NULL;
pixbuf = _gdk_pixbuf_new_from_stream_scaled (stream, scale, NULL, error);
g_object_unref (stream);
return pixbuf;
}
static GdkPixbuf *
load_symbolic_svg (const char *file_data,
gsize file_len,
int width,
int height,
double scale,
const GdkRGBA *fg,
const GdkRGBA *success_color,
const GdkRGBA *warning_color,
const GdkRGBA *error_color,
GError **error)
{
GInputStream *stream;
GdkPixbuf *pixbuf;
gchar *css_fg;
gchar *css_success;
gchar *css_warning;
gchar *css_error;
gchar *data;
gchar *svg_width, *svg_height;
gchar *escaped_file_data;
css_fg = gdk_rgba_to_string (fg);
css_success = css_warning = css_error = NULL;
css_warning = gdk_rgba_to_string (warning_color);
css_error = gdk_rgba_to_string (error_color);
css_success = gdk_rgba_to_string (success_color);
/* Fetch size from the original icon */
stream = g_memory_input_stream_new_from_data (file_data, file_len, NULL);
pixbuf = gdk_pixbuf_new_from_stream (stream, NULL, error);
g_object_unref (stream);
if (!pixbuf)
return NULL;
if (width == 0)
width = gdk_pixbuf_get_width (pixbuf) * scale;
if (height == 0)
height = gdk_pixbuf_get_height (pixbuf) * scale;
svg_width = g_strdup_printf ("%d", gdk_pixbuf_get_width (pixbuf));
svg_height = g_strdup_printf ("%d", gdk_pixbuf_get_height (pixbuf));
g_object_unref (pixbuf);
escaped_file_data = g_markup_escape_text (file_data, file_len);
data = g_strconcat ("\n"
"",
NULL);
g_free (escaped_file_data);
g_free (css_fg);
g_free (css_warning);
g_free (css_error);
g_free (css_success);
g_free (svg_width);
g_free (svg_height);
stream = g_memory_input_stream_new_from_data (data, -1, g_free);
pixbuf = gdk_pixbuf_new_from_stream_at_scale (stream, width, height, TRUE, NULL, error);
g_object_unref (stream);
return pixbuf;
}
static void
extract_plane (GdkPixbuf *src,
GdkPixbuf *dst,
int from_plane,
int to_plane)
{
guchar *src_data, *dst_data;
int width, height, src_stride, dst_stride;
guchar *src_row, *dst_row;
int x, y;
width = gdk_pixbuf_get_width (src);
height = gdk_pixbuf_get_height (src);
g_assert (width <= gdk_pixbuf_get_width (dst));
g_assert (height <= gdk_pixbuf_get_height (dst));
src_stride = gdk_pixbuf_get_rowstride (src);
src_data = gdk_pixbuf_get_pixels (src);
dst_data = gdk_pixbuf_get_pixels (dst);
dst_stride = gdk_pixbuf_get_rowstride (dst);
for (y = 0; y < height; y++)
{
src_row = src_data + src_stride * y;
dst_row = dst_data + dst_stride * y;
for (x = 0; x < width; x++)
{
dst_row[to_plane] = src_row[from_plane];
src_row += 4;
dst_row += 4;
}
}
}
GdkPixbuf *
gtk_make_symbolic_pixbuf_from_data (const char *file_data,
gsize file_len,
int width,
int height,
double scale,
GError **error)
{
GdkRGBA r = { 1,0,0,1}, g = {0,1,0,1};
GdkPixbuf *loaded;
GdkPixbuf *pixbuf = NULL;
int plane;
for (plane = 0; plane < 3; plane++)
{
/* Here we render the svg with all colors solid, this should
* always make the alpha channel the same and it should match
* the final alpha channel for all possible renderings. We
* Just use it as-is for final alpha.
*
* For the 3 non-fg colors, we render once each with that
* color as red, and every other color as green. The resulting
* red will describe the amount of that color is in the
* opaque part of the color. We store these as the rgb
* channels, with the color of the fg being implicitly
* the "rest", as all color fractions should add up to 1.
*/
loaded = load_symbolic_svg (file_data, file_len, width, height, scale,
&g,
plane == 0 ? &r : &g,
plane == 1 ? &r : &g,
plane == 2 ? &r : &g,
error);
if (loaded == NULL)
return NULL;
if (pixbuf == NULL)
{
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
gdk_pixbuf_get_width (loaded),
gdk_pixbuf_get_height (loaded));
gdk_pixbuf_fill (pixbuf, 0);
}
if (plane == 0)
extract_plane (loaded, pixbuf, 3, 3);
extract_plane (loaded, pixbuf, 0, plane);
g_object_unref (loaded);
}
return pixbuf;
}
GdkPixbuf *
gtk_make_symbolic_pixbuf_from_resource (const char *path,
int width,
int height,
double scale,
GError **error)
{
GBytes *bytes;
const char *data;
gsize size;
GdkPixbuf *pixbuf;
bytes = g_resources_lookup_data (path, G_RESOURCE_LOOKUP_FLAGS_NONE, error);
if (bytes == NULL)
return NULL;
data = g_bytes_get_data (bytes, &size);
pixbuf = gtk_make_symbolic_pixbuf_from_data (data, size, width, height, scale, error);
g_bytes_unref (bytes);
return pixbuf;
}
GdkPixbuf *
gtk_make_symbolic_pixbuf_from_file (GFile *file,
int width,
int height,
double scale,
GError **error)
{
char *data;
gsize size;
GdkPixbuf *pixbuf;
if (!g_file_load_contents (file, NULL, &data, &size, NULL, error))
return NULL;
pixbuf = gtk_make_symbolic_pixbuf_from_data (data, size, width, height, scale, error);
g_free (data);
return pixbuf;
}
GdkTexture *
gtk_make_symbolic_texture_from_resource (const char *path,
int width,
int height,
double scale,
GError **error)
{
GdkPixbuf *pixbuf;
GdkTexture *texture;
pixbuf = gtk_make_symbolic_pixbuf_from_resource (path, width, height, scale, error);
texture = gdk_texture_new_for_pixbuf (pixbuf);
g_object_unref (pixbuf);
return texture;
}
GdkTexture *
gtk_make_symbolic_texture_from_file (GFile *file,
int width,
int height,
double scale,
GError **error)
{
GdkPixbuf *pixbuf;
GdkTexture *texture;
pixbuf = gtk_make_symbolic_pixbuf_from_file (file, width, height, scale, error);
texture = gdk_texture_new_for_pixbuf (pixbuf);
g_object_unref (pixbuf);
return texture;
}