+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
/* GdkPixbuf library - Basic memory management
*
* Copyright (C) 1999 The Free Software Foundation
* Federico Mena-Quintero <federico@gimp.org>
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * 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
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
-#include <config.h>
+#include "config.h"
#include <math.h>
-#include <libart_lgpl/art_misc.h>
-#include <libart_lgpl/art_affine.h>
-#include <libart_lgpl/art_pixbuf.h>
-#include <libart_lgpl/art_rgb_pixbuf_affine.h>
-#include <libart_lgpl/art_alphagamma.h>
+#include <stdlib.h>
+#include <string.h>
+#define GDK_PIXBUF_C_COMPILATION
#include "gdk-pixbuf.h"
+#include "gdk-pixbuf-private.h"
+/* Include the marshallers */
+#include <glib-object.h>
+#include "gdk-pixbuf-marshal.c"
+#include "gdk-pixbuf-alias.h"
+
+static void gdk_pixbuf_finalize (GObject *object);
+static void gdk_pixbuf_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gdk_pixbuf_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
\f
+enum
+{
+ PROP_0,
+ PROP_COLORSPACE,
+ PROP_N_CHANNELS,
+ PROP_HAS_ALPHA,
+ PROP_BITS_PER_SAMPLE,
+ PROP_WIDTH,
+ PROP_HEIGHT,
+ PROP_ROWSTRIDE,
+ PROP_PIXELS
+};
+
+G_DEFINE_TYPE (GdkPixbuf, gdk_pixbuf, G_TYPE_OBJECT)
+
+static void
+gdk_pixbuf_init (GdkPixbuf *pixbuf)
+{
+}
+
+static void
+gdk_pixbuf_class_init (GdkPixbufClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->finalize = gdk_pixbuf_finalize;
+ object_class->set_property = gdk_pixbuf_set_property;
+ object_class->get_property = gdk_pixbuf_get_property;
+
+#define PIXBUF_PARAM_FLAGS G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY|\
+ G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB
+ /**
+ * GdkPixbuf:n-channels:
+ *
+ * The number of samples per pixel.
+ * Currently, only 3 or 4 samples per pixel are supported.
+ */
+ g_object_class_install_property (object_class,
+ PROP_N_CHANNELS,
+ g_param_spec_int ("n-channels",
+ P_("Number of Channels"),
+ P_("The number of samples per pixel"),
+ 0,
+ G_MAXINT,
+ 3,
+ PIXBUF_PARAM_FLAGS));
+
+ g_object_class_install_property (object_class,
+ PROP_COLORSPACE,
+ g_param_spec_enum ("colorspace",
+ P_("Colorspace"),
+ P_("The colorspace in which the samples are interpreted"),
+ GDK_TYPE_COLORSPACE,
+ GDK_COLORSPACE_RGB,
+ PIXBUF_PARAM_FLAGS));
+
+ g_object_class_install_property (object_class,
+ PROP_HAS_ALPHA,
+ g_param_spec_boolean ("has-alpha",
+ P_("Has Alpha"),
+ P_("Whether the pixbuf has an alpha channel"),
+ FALSE,
+ PIXBUF_PARAM_FLAGS));
+
+ /**
+ * GdkPixbuf:bits-per-sample:
+ *
+ * The number of bits per sample.
+ * Currently only 8 bit per sample are supported.
+ */
+ g_object_class_install_property (object_class,
+ PROP_BITS_PER_SAMPLE,
+ g_param_spec_int ("bits-per-sample",
+ P_("Bits per Sample"),
+ P_("The number of bits per sample"),
+ 1,
+ 16,
+ 8,
+ PIXBUF_PARAM_FLAGS));
+
+ g_object_class_install_property (object_class,
+ PROP_WIDTH,
+ g_param_spec_int ("width",
+ P_("Width"),
+ P_("The number of columns of the pixbuf"),
+ 1,
+ G_MAXINT,
+ 1,
+ PIXBUF_PARAM_FLAGS));
+
+ g_object_class_install_property (object_class,
+ PROP_HEIGHT,
+ g_param_spec_int ("height",
+ P_("Height"),
+ P_("The number of rows of the pixbuf"),
+ 1,
+ G_MAXINT,
+ 1,
+ PIXBUF_PARAM_FLAGS));
+
+ /**
+ * GdkPixbuf:rowstride:
+ *
+ * The number of bytes between the start of a row and
+ * the start of the next row. This number must (obviously)
+ * be at least as large as the width of the pixbuf.
+ */
+ g_object_class_install_property (object_class,
+ PROP_ROWSTRIDE,
+ g_param_spec_int ("rowstride",
+ P_("Rowstride"),
+ P_("The number of bytes between the start of a row and the start of the next row"),
+ 1,
+ G_MAXINT,
+ 1,
+ PIXBUF_PARAM_FLAGS));
+
+ g_object_class_install_property (object_class,
+ PROP_PIXELS,
+ g_param_spec_pointer ("pixels",
+ P_("Pixels"),
+ P_("A pointer to the pixel data of the pixbuf"),
+ PIXBUF_PARAM_FLAGS));
+}
-/* Reference counting */
+static void
+gdk_pixbuf_finalize (GObject *object)
+{
+ GdkPixbuf *pixbuf = GDK_PIXBUF (object);
+
+ if (pixbuf->destroy_fn)
+ (* pixbuf->destroy_fn) (pixbuf->pixels, pixbuf->destroy_fn_data);
+
+ G_OBJECT_CLASS (gdk_pixbuf_parent_class)->finalize (object);
+}
+\f
/**
* gdk_pixbuf_ref:
* @pixbuf: A pixbuf.
*
- * Adds a reference to a pixbuf. It must be released afterwards using
- * gdk_pixbuf_unref().
+ * Adds a reference to a pixbuf.
+ *
+ * Return value: The same as the @pixbuf argument.
+ *
+ * Deprecated: Use g_object_ref().
**/
-void
+GdkPixbuf *
gdk_pixbuf_ref (GdkPixbuf *pixbuf)
{
- g_return_if_fail (pixbuf != NULL);
- g_return_if_fail (pixbuf->ref_count > 0);
-
- pixbuf->ref_count++;
+ return (GdkPixbuf *) g_object_ref (pixbuf);
}
/**
* gdk_pixbuf_unref:
* @pixbuf: A pixbuf.
*
- * Removes a reference from a pixbuf. It will be destroyed when the reference
- * count drops to zero.
+ * Removes a reference from a pixbuf.
+ *
+ * Deprecated: Use g_object_unref().
**/
void
gdk_pixbuf_unref (GdkPixbuf *pixbuf)
{
- g_return_if_fail (pixbuf != NULL);
- g_return_if_fail (pixbuf->ref_count > 0);
-
- pixbuf->ref_count--;
-
- if (pixbuf->ref_count == 0) {
- art_pixbuf_free (pixbuf->art_pixbuf);
- pixbuf->art_pixbuf = NULL;
- g_free (pixbuf);
- }
+ g_object_unref (pixbuf);
}
\f
-/* Wrap a libart pixbuf */
+/* Used as the destroy notification function for gdk_pixbuf_new() */
+static void
+free_buffer (guchar *pixels, gpointer data)
+{
+ g_free (pixels);
+}
/**
- * gdk_pixbuf_new_from_art_pixbuf:
- * @art_pixbuf: A libart pixbuf.
+ * gdk_pixbuf_new:
+ * @colorspace: Color space for image
+ * @has_alpha: Whether the image should have transparency information
+ * @bits_per_sample: Number of bits per color sample
+ * @width: Width of image in pixels, must be > 0
+ * @height: Height of image in pixels, must be > 0
*
- * Creates a &GdkPixbuf by wrapping a libart pixbuf.
+ * Creates a new #GdkPixbuf structure and allocates a buffer for it. The
+ * buffer has an optimal rowstride. Note that the buffer is not cleared;
+ * you will have to fill it completely yourself.
*
- * Return value: A newly-created &GdkPixbuf structure with a reference count of
- * 1.
+ * Return value: A newly-created #GdkPixbuf with a reference count of 1, or
+ * %NULL if not enough memory could be allocated for the image buffer.
**/
GdkPixbuf *
-gdk_pixbuf_new_from_art_pixbuf (ArtPixBuf *art_pixbuf)
+gdk_pixbuf_new (GdkColorspace colorspace,
+ gboolean has_alpha,
+ int bits_per_sample,
+ int width,
+ int height)
{
- GdkPixbuf *pixbuf;
+ guchar *buf;
+ int channels;
+ int rowstride;
+ gsize bytes;
- g_return_val_if_fail (art_pixbuf != NULL, NULL);
+ g_return_val_if_fail (colorspace == GDK_COLORSPACE_RGB, NULL);
+ g_return_val_if_fail (bits_per_sample == 8, NULL);
+ g_return_val_if_fail (width > 0, NULL);
+ g_return_val_if_fail (height > 0, NULL);
- pixbuf = g_new (GdkPixbuf, 1);
- pixbuf->ref_count = 1;
- pixbuf->art_pixbuf = art_pixbuf;
+ channels = has_alpha ? 4 : 3;
+ rowstride = width * channels;
+ if (rowstride / channels != width || rowstride + 3 < 0) /* overflow */
+ return NULL;
+
+ /* Always align rows to 32-bit boundaries */
+ rowstride = (rowstride + 3) & ~3;
- return pixbuf;
-}
+ bytes = height * rowstride;
+ if (bytes / rowstride != height) /* overflow */
+ return NULL;
+
+ buf = g_try_malloc (bytes);
+ if (!buf)
+ return NULL;
-/* Destroy notification function for gdk_pixbuf_new() */
-static void
-free_buffer (gpointer user_data, gpointer data)
-{
- free (data);
+ return gdk_pixbuf_new_from_data (buf, colorspace, has_alpha, bits_per_sample,
+ width, height, rowstride,
+ free_buffer, NULL);
}
-\f
-
-/* Create an empty pixbuf */
-
/**
- * gdk_pixbuf_new:
- * @format: Image format.
- * @has_alpha: Whether the image should have transparency information.
- * @bits_per_sample: Number of bits per color sample.
- * @width: Width of image in pixels.
- * @height: Height of image in pixels.
- *
- * Creates a new &GdkPixbuf structure and allocates a buffer for it. The buffer
- * has an optimal rowstride. Note that the buffer is not cleared; you will have
- * to fill it completely.
- *
- * Return value: A newly-created &GdkPixbuf, or NULL if not enough memory
- * could be allocated for the image buffer.
+ * gdk_pixbuf_copy:
+ * @pixbuf: A pixbuf.
+ *
+ * Creates a new #GdkPixbuf with a copy of the information in the specified
+ * @pixbuf.
+ *
+ * Return value: A newly-created pixbuf with a reference count of 1, or %NULL if
+ * not enough memory could be allocated.
**/
GdkPixbuf *
-gdk_pixbuf_new (ArtPixFormat format, gboolean has_alpha, int bits_per_sample,
- int width, int height)
+gdk_pixbuf_copy (const GdkPixbuf *pixbuf)
{
guchar *buf;
- int channels;
- int rowstride;
+ int size;
- g_return_val_if_fail (format == ART_PIX_RGB, NULL);
- g_return_val_if_fail (bits_per_sample == 8, NULL);
- g_return_val_if_fail (width > 0, NULL);
- g_return_val_if_fail (height > 0, NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
- /* Always align rows to 32-bit boundaries */
+ /* Calculate a semi-exact size. Here we copy with full rowstrides;
+ * maybe we should copy each row individually with the minimum
+ * rowstride?
+ */
- channels = has_alpha ? 4 : 3;
- rowstride = 4 * ((channels * width + 3) / 4);
+ size = ((pixbuf->height - 1) * pixbuf->rowstride +
+ pixbuf->width * ((pixbuf->n_channels * pixbuf->bits_per_sample + 7) / 8));
- buf = malloc (height * rowstride);
+ buf = g_try_malloc (size * sizeof (guchar));
if (!buf)
return NULL;
- return gdk_pixbuf_new_from_data (buf, format, has_alpha, width, height, rowstride,
- free_buffer, NULL);
+ memcpy (buf, pixbuf->pixels, size);
+
+ return gdk_pixbuf_new_from_data (buf,
+ pixbuf->colorspace, pixbuf->has_alpha,
+ pixbuf->bits_per_sample,
+ pixbuf->width, pixbuf->height,
+ pixbuf->rowstride,
+ free_buffer,
+ NULL);
+}
+
+/**
+ * gdk_pixbuf_new_subpixbuf:
+ * @src_pixbuf: a #GdkPixbuf
+ * @src_x: X coord in @src_pixbuf
+ * @src_y: Y coord in @src_pixbuf
+ * @width: width of region in @src_pixbuf
+ * @height: height of region in @src_pixbuf
+ *
+ * Creates a new pixbuf which represents a sub-region of
+ * @src_pixbuf. The new pixbuf shares its pixels with the
+ * original pixbuf, so writing to one affects both.
+ * The new pixbuf holds a reference to @src_pixbuf, so
+ * @src_pixbuf will not be finalized until the new pixbuf
+ * is finalized.
+ *
+ * Return value: a new pixbuf
+ **/
+GdkPixbuf*
+gdk_pixbuf_new_subpixbuf (GdkPixbuf *src_pixbuf,
+ int src_x,
+ int src_y,
+ int width,
+ int height)
+{
+ guchar *pixels;
+ GdkPixbuf *sub;
+
+ g_return_val_if_fail (GDK_IS_PIXBUF (src_pixbuf), NULL);
+ g_return_val_if_fail (src_x >= 0 && src_x + width <= src_pixbuf->width, NULL);
+ g_return_val_if_fail (src_y >= 0 && src_y + height <= src_pixbuf->height, NULL);
+
+ pixels = (gdk_pixbuf_get_pixels (src_pixbuf)
+ + src_y * src_pixbuf->rowstride
+ + src_x * src_pixbuf->n_channels);
+
+ sub = gdk_pixbuf_new_from_data (pixels,
+ src_pixbuf->colorspace,
+ src_pixbuf->has_alpha,
+ src_pixbuf->bits_per_sample,
+ width, height,
+ src_pixbuf->rowstride,
+ NULL, NULL);
+
+ /* Keep a reference to src_pixbuf */
+ g_object_ref (src_pixbuf);
+
+ g_object_set_qdata_full (G_OBJECT (sub),
+ g_quark_from_static_string ("gdk-pixbuf-subpixbuf-src"),
+ src_pixbuf,
+ (GDestroyNotify) g_object_unref);
+
+ return sub;
}
\f
-/* Convenience functions */
+/* Accessors */
/**
- * gdk_pixbuf_get_format:
+ * gdk_pixbuf_get_colorspace:
* @pixbuf: A pixbuf.
*
- * Queries the image format (color model) of a pixbuf.
+ * Queries the color space of a pixbuf.
*
- * Return value: Image format.
+ * Return value: Color space.
**/
-ArtPixFormat
-gdk_pixbuf_get_format (GdkPixbuf *pixbuf)
+GdkColorspace
+gdk_pixbuf_get_colorspace (const GdkPixbuf *pixbuf)
{
- /* Unfortunately, there's nothing else to return */
- g_return_val_if_fail (pixbuf != NULL, ART_PIX_RGB);
- g_assert (pixbuf->art_pixbuf != NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), GDK_COLORSPACE_RGB);
- return (pixbuf->art_pixbuf->format);
+ return pixbuf->colorspace;
}
/**
* Return value: Number of channels.
**/
int
-gdk_pixbuf_get_n_channels (GdkPixbuf *pixbuf)
+gdk_pixbuf_get_n_channels (const GdkPixbuf *pixbuf)
{
- g_return_val_if_fail (pixbuf != NULL, -1);
- g_assert (pixbuf->art_pixbuf != NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), -1);
- return (pixbuf->art_pixbuf->n_channels);
+ return pixbuf->n_channels;
}
/**
*
* Queries whether a pixbuf has an alpha channel (opacity information).
*
- * Return value: TRUE if it has an alpha channel, FALSE otherwise.
+ * Return value: %TRUE if it has an alpha channel, %FALSE otherwise.
**/
-int
-gdk_pixbuf_get_has_alpha (GdkPixbuf *pixbuf)
+gboolean
+gdk_pixbuf_get_has_alpha (const GdkPixbuf *pixbuf)
{
- g_return_val_if_fail (pixbuf != NULL, -1);
- g_assert (pixbuf->art_pixbuf != NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), FALSE);
- return (pixbuf->art_pixbuf->has_alpha);
+ return pixbuf->has_alpha ? TRUE : FALSE;
}
/**
* Return value: Number of bits per color sample.
**/
int
-gdk_pixbuf_get_bits_per_sample (GdkPixbuf *pixbuf)
+gdk_pixbuf_get_bits_per_sample (const GdkPixbuf *pixbuf)
{
- g_return_val_if_fail (pixbuf != NULL, -1);
- g_assert (pixbuf->art_pixbuf != NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), -1);
- return (pixbuf->art_pixbuf->bits_per_sample);
+ return pixbuf->bits_per_sample;
}
/**
*
* Queries a pointer to the pixel data of a pixbuf.
*
- * Return value: A pointer to the pixbuf's pixel data.
+ * Return value: A pointer to the pixbuf's pixel data. Please see <xref linkend="image-data"/>
+ * for information about how the pixel data is stored in
+ * memory.
**/
guchar *
-gdk_pixbuf_get_pixels (GdkPixbuf *pixbuf)
+gdk_pixbuf_get_pixels (const GdkPixbuf *pixbuf)
{
- g_return_val_if_fail (pixbuf != NULL, NULL);
- g_assert (pixbuf->art_pixbuf != NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
- return (pixbuf->art_pixbuf->pixels);
+ return pixbuf->pixels;
}
/**
* Return value: Width in pixels.
**/
int
-gdk_pixbuf_get_width (GdkPixbuf *pixbuf)
+gdk_pixbuf_get_width (const GdkPixbuf *pixbuf)
{
- g_return_val_if_fail (pixbuf != NULL, -1);
- g_assert (pixbuf->art_pixbuf != NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), -1);
- return (pixbuf->art_pixbuf->width);
+ return pixbuf->width;
}
/**
* Return value: Height in pixels.
**/
int
-gdk_pixbuf_get_height (GdkPixbuf *pixbuf)
+gdk_pixbuf_get_height (const GdkPixbuf *pixbuf)
{
- g_return_val_if_fail (pixbuf != NULL, -1);
- g_assert (pixbuf->art_pixbuf != NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), -1);
- return (pixbuf->art_pixbuf->height);
+ return pixbuf->height;
}
/**
* gdk_pixbuf_get_rowstride:
* @pixbuf: A pixbuf.
*
- * Queries the rowstride of a pixbuf, or the number of bytes between rows.
+ * Queries the rowstride of a pixbuf, which is the number of bytes between the start of a row
+ * and the start of the next row.
*
- * Return value: Number of bytes between rows.
+ * Return value: Distance between row starts.
**/
int
-gdk_pixbuf_get_rowstride (GdkPixbuf *pixbuf)
+gdk_pixbuf_get_rowstride (const GdkPixbuf *pixbuf)
+{
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), -1);
+
+ return pixbuf->rowstride;
+}
+
+\f
+
+/* General initialization hooks */
+const guint gdk_pixbuf_major_version = GDK_PIXBUF_MAJOR;
+const guint gdk_pixbuf_minor_version = GDK_PIXBUF_MINOR;
+const guint gdk_pixbuf_micro_version = GDK_PIXBUF_MICRO;
+
+const char *gdk_pixbuf_version = GDK_PIXBUF_VERSION;
+
+/* Error quark */
+GQuark
+gdk_pixbuf_error_quark (void)
{
- g_return_val_if_fail (pixbuf != NULL, -1);
- g_assert (pixbuf->art_pixbuf != NULL);
+ return g_quark_from_static_string ("gdk-pixbuf-error-quark");
+}
- return (pixbuf->art_pixbuf->rowstride);
+/**
+ * gdk_pixbuf_fill:
+ * @pixbuf: a #GdkPixbuf
+ * @pixel: RGBA pixel to clear to
+ * (0xffffffff is opaque white, 0x00000000 transparent black)
+ *
+ * Clears a pixbuf to the given RGBA value, converting the RGBA value into
+ * the pixbuf's pixel format. The alpha will be ignored if the pixbuf
+ * doesn't have an alpha channel.
+ *
+ **/
+void
+gdk_pixbuf_fill (GdkPixbuf *pixbuf,
+ guint32 pixel)
+{
+ guchar *pixels;
+ guint r, g, b, a;
+ guchar *p;
+ guint w, h;
+
+ g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
+
+ if (pixbuf->width == 0 || pixbuf->height == 0)
+ return;
+
+ pixels = pixbuf->pixels;
+
+ r = (pixel & 0xff000000) >> 24;
+ g = (pixel & 0x00ff0000) >> 16;
+ b = (pixel & 0x0000ff00) >> 8;
+ a = (pixel & 0x000000ff);
+
+ h = pixbuf->height;
+
+ while (h--) {
+ w = pixbuf->width;
+ p = pixels;
+
+ switch (pixbuf->n_channels) {
+ case 3:
+ while (w--) {
+ p[0] = r;
+ p[1] = g;
+ p[2] = b;
+ p += 3;
+ }
+ break;
+ case 4:
+ while (w--) {
+ p[0] = r;
+ p[1] = g;
+ p[2] = b;
+ p[3] = a;
+ p += 4;
+ }
+ break;
+ default:
+ break;
+ }
+
+ pixels += pixbuf->rowstride;
+ }
}
+
+\f
+
+/**
+ * gdk_pixbuf_get_option:
+ * @pixbuf: a #GdkPixbuf
+ * @key: a nul-terminated string.
+ *
+ * Looks up @key in the list of options that may have been attached to the
+ * @pixbuf when it was loaded, or that may have been attached by another
+ * function using gdk_pixbuf_set_option().
+ *
+ * For instance, the ANI loader provides "Title" and "Artist" options.
+ * The ICO, XBM, and XPM loaders provide "x_hot" and "y_hot" hot-spot
+ * options for cursor definitions. The PNG loader provides the tEXt ancillary
+ * chunk key/value pairs as options. Since 2.12, the TIFF and JPEG loaders
+ * return an "orientation" option string that corresponds to the embedded
+ * TIFF/Exif orientation tag (if present).
+ *
+ * Return value: the value associated with @key. This is a nul-terminated
+ * string that should not be freed or %NULL if @key was not found.
+ **/
+G_CONST_RETURN gchar *
+gdk_pixbuf_get_option (GdkPixbuf *pixbuf,
+ const gchar *key)
+{
+ gchar **options;
+ gint i;
+
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
+ g_return_val_if_fail (key != NULL, NULL);
+
+ options = g_object_get_qdata (G_OBJECT (pixbuf),
+ g_quark_from_static_string ("gdk_pixbuf_options"));
+ if (options) {
+ for (i = 0; options[2*i]; i++) {
+ if (strcmp (options[2*i], key) == 0)
+ return options[2*i+1];
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * gdk_pixbuf_set_option:
+ * @pixbuf: a #GdkPixbuf
+ * @key: a nul-terminated string.
+ * @value: a nul-terminated string.
+ *
+ * Attaches a key/value pair as an option to a #GdkPixbuf. If %key already
+ * exists in the list of options attached to @pixbuf, the new value is
+ * ignored and %FALSE is returned.
+ *
+ * Return value: %TRUE on success.
+ *
+ * Since: 2.2
+ **/
+gboolean
+gdk_pixbuf_set_option (GdkPixbuf *pixbuf,
+ const gchar *key,
+ const gchar *value)
+{
+ GQuark quark;
+ gchar **options;
+ gint n = 0;
+
+ g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), FALSE);
+ g_return_val_if_fail (key != NULL, FALSE);
+ g_return_val_if_fail (value != NULL, FALSE);
+
+ quark = g_quark_from_static_string ("gdk_pixbuf_options");
+
+ options = g_object_get_qdata (G_OBJECT (pixbuf), quark);
+
+ if (options) {
+ for (n = 0; options[2*n]; n++) {
+ if (strcmp (options[2*n], key) == 0)
+ return FALSE;
+ }
+
+ g_object_steal_qdata (G_OBJECT (pixbuf), quark);
+ options = g_renew (gchar *, options, 2*(n+1) + 1);
+ } else {
+ options = g_new (gchar *, 3);
+ }
+
+ options[2*n] = g_strdup (key);
+ options[2*n+1] = g_strdup (value);
+ options[2*n+2] = NULL;
+
+ g_object_set_qdata_full (G_OBJECT (pixbuf), quark,
+ options, (GDestroyNotify) g_strfreev);
+
+ return TRUE;
+}
+
+static void
+gdk_pixbuf_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GdkPixbuf *pixbuf = GDK_PIXBUF (object);
+
+ switch (prop_id)
+ {
+ case PROP_COLORSPACE:
+ pixbuf->colorspace = g_value_get_enum (value);
+ break;
+ case PROP_N_CHANNELS:
+ pixbuf->n_channels = g_value_get_int (value);
+ break;
+ case PROP_HAS_ALPHA:
+ pixbuf->has_alpha = g_value_get_boolean (value);
+ break;
+ case PROP_BITS_PER_SAMPLE:
+ pixbuf->bits_per_sample = g_value_get_int (value);
+ break;
+ case PROP_WIDTH:
+ pixbuf->width = g_value_get_int (value);
+ break;
+ case PROP_HEIGHT:
+ pixbuf->height = g_value_get_int (value);
+ break;
+ case PROP_ROWSTRIDE:
+ pixbuf->rowstride = g_value_get_int (value);
+ break;
+ case PROP_PIXELS:
+ pixbuf->pixels = (guchar *) g_value_get_pointer (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gdk_pixbuf_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GdkPixbuf *pixbuf = GDK_PIXBUF (object);
+
+ switch (prop_id)
+ {
+ case PROP_COLORSPACE:
+ g_value_set_enum (value, gdk_pixbuf_get_colorspace (pixbuf));
+ break;
+ case PROP_N_CHANNELS:
+ g_value_set_int (value, gdk_pixbuf_get_n_channels (pixbuf));
+ break;
+ case PROP_HAS_ALPHA:
+ g_value_set_boolean (value, gdk_pixbuf_get_has_alpha (pixbuf));
+ break;
+ case PROP_BITS_PER_SAMPLE:
+ g_value_set_int (value, gdk_pixbuf_get_bits_per_sample (pixbuf));
+ break;
+ case PROP_WIDTH:
+ g_value_set_int (value, gdk_pixbuf_get_width (pixbuf));
+ break;
+ case PROP_HEIGHT:
+ g_value_set_int (value, gdk_pixbuf_get_height (pixbuf));
+ break;
+ case PROP_ROWSTRIDE:
+ g_value_set_int (value, gdk_pixbuf_get_rowstride (pixbuf));
+ break;
+ case PROP_PIXELS:
+ g_value_set_pointer (value, gdk_pixbuf_get_pixels (pixbuf));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+#define __GDK_PIXBUF_C__
+#include "gdk-pixbuf-aliasdef.c"
projects / ~andy / gtk / blobdiff