+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
/* GdkPixbuf library - Progressive loader object
*
* Copyright (C) 1999 The Free Software Foundation
#include <string.h>
#include "gdk-pixbuf-private.h"
-#include "gdk-pixbuf-loader.h"
+#include "gdk-pixbuf-animation.h"
#include "gdk-pixbuf-io.h"
+#include "gdk-pixbuf-loader.h"
#include "gdk-pixbuf-marshal.h"
-#include <gobject/gsignal.h>
-
enum {
- AREA_UPDATED,
- AREA_PREPARED,
- FRAME_DONE,
- ANIMATION_DONE,
- CLOSED,
- LAST_SIGNAL
+ SIZE_PREPARED,
+ AREA_PREPARED,
+ AREA_UPDATED,
+ CLOSED,
+ LAST_SIGNAL
};
typedef struct
{
- GdkPixbuf *pixbuf;
- GdkPixbufAnimation *animation;
- gboolean closed;
- guchar header_buf[LOADER_HEADER_SIZE];
- gint header_buf_offset;
- GdkPixbufModule *image_module;
- gpointer context;
+ GdkPixbufAnimation *animation;
+ gboolean closed;
+ guchar header_buf[LOADER_HEADER_SIZE];
+ gint header_buf_offset;
+ GdkPixbufModule *image_module;
+ gpointer context;
+ gint width;
+ gint height;
+ gboolean size_fixed;
+ gboolean needs_scale;
} GdkPixbufLoaderPrivate;
* gdk_pixbuf_loader_get_type:
* @void:
*
- * Registers the #GdkPixubfLoader class if necessary, and returns the type ID
+ * Registers the #GdkPixbufLoader class if necessary, and returns the type ID
* associated to it.
*
* Return value: The type ID of the #GdkPixbufLoader class.
GType
gdk_pixbuf_loader_get_type (void)
{
- static GType loader_type = 0;
-
- if (!loader_type)
- {
- static const GTypeInfo loader_info = {
- sizeof (GdkPixbufLoaderClass),
- (GBaseInitFunc) NULL,
- (GBaseFinalizeFunc) NULL,
- (GClassInitFunc) gdk_pixbuf_loader_class_init,
- NULL, /* class_finalize */
- NULL, /* class_data */
- sizeof (GdkPixbufLoader),
- 0, /* n_preallocs */
- (GInstanceInitFunc) gdk_pixbuf_loader_init
- };
-
- g_type_init ();
+ static GType loader_type = 0;
+
+ if (!loader_type)
+ {
+ static const GTypeInfo loader_info = {
+ sizeof (GdkPixbufLoaderClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) gdk_pixbuf_loader_class_init,
+ NULL, /* class_finalize */
+ NULL, /* class_data */
+ sizeof (GdkPixbufLoader),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) gdk_pixbuf_loader_init
+ };
- loader_type = g_type_register_static (G_TYPE_OBJECT,
- "GdkPixbufLoader",
- &loader_info,
- 0);
- }
+ loader_type = g_type_register_static (G_TYPE_OBJECT,
+ "GdkPixbufLoader",
+ &loader_info,
+ 0);
+ }
- return loader_type;
+ return loader_type;
}
static void
gdk_pixbuf_loader_class_init (GdkPixbufLoaderClass *class)
{
- GObjectClass *object_class;
-
- object_class = (GObjectClass *) class;
-
- parent_class = g_type_class_peek_parent (class);
-
- object_class->finalize = gdk_pixbuf_loader_finalize;
-
- pixbuf_loader_signals[AREA_PREPARED] =
- g_signal_newc ("area_prepared",
- G_TYPE_FROM_CLASS (object_class),
- G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GdkPixbufLoaderClass, area_prepared),
- NULL,
- gdk_pixbuf_marshal_VOID__VOID,
- G_TYPE_NONE, 0);
-
- pixbuf_loader_signals[AREA_UPDATED] =
- g_signal_newc ("area_updated",
- G_TYPE_FROM_CLASS (object_class),
- G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GdkPixbufLoaderClass, area_updated),
- NULL,
- gdk_pixbuf_marshal_VOID__INT_INT_INT_INT,
- G_TYPE_NONE, 4,
- G_TYPE_INT,
- G_TYPE_INT,
- G_TYPE_INT,
- G_TYPE_INT);
-
- pixbuf_loader_signals[FRAME_DONE] =
- g_signal_newc ("frame_done",
- G_TYPE_FROM_CLASS (object_class),
- G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GdkPixbufLoaderClass, frame_done),
- NULL,
- gdk_pixbuf_marshal_VOID__POINTER,
- G_TYPE_NONE, 1,
- GDK_TYPE_PIXBUF_FRAME);
-
- pixbuf_loader_signals[ANIMATION_DONE] =
- g_signal_newc ("animation_done",
- G_TYPE_FROM_CLASS (object_class),
- G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GdkPixbufLoaderClass, animation_done),
- NULL,
- gdk_pixbuf_marshal_VOID__VOID,
- G_TYPE_NONE, 0);
-
- pixbuf_loader_signals[CLOSED] =
- g_signal_newc ("closed",
- G_TYPE_FROM_CLASS (object_class),
- G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GdkPixbufLoaderClass, closed),
- NULL,
- gdk_pixbuf_marshal_VOID__VOID,
- G_TYPE_NONE, 0);
+ GObjectClass *object_class;
+
+ object_class = (GObjectClass *) class;
+
+ parent_class = g_type_class_peek_parent (class);
+
+ object_class->finalize = gdk_pixbuf_loader_finalize;
+
+ pixbuf_loader_signals[SIZE_PREPARED] =
+ g_signal_new ("size_prepared",
+ G_TYPE_FROM_CLASS (object_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GdkPixbufLoaderClass, size_prepared),
+ NULL, NULL,
+ gdk_pixbuf_marshal_VOID__INT_INT,
+ G_TYPE_NONE, 2,
+ G_TYPE_INT,
+ G_TYPE_INT);
+
+ pixbuf_loader_signals[AREA_PREPARED] =
+ g_signal_new ("area_prepared",
+ G_TYPE_FROM_CLASS (object_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GdkPixbufLoaderClass, area_prepared),
+ NULL, NULL,
+ gdk_pixbuf_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+
+ pixbuf_loader_signals[AREA_UPDATED] =
+ g_signal_new ("area_updated",
+ G_TYPE_FROM_CLASS (object_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GdkPixbufLoaderClass, area_updated),
+ NULL, NULL,
+ gdk_pixbuf_marshal_VOID__INT_INT_INT_INT,
+ G_TYPE_NONE, 4,
+ G_TYPE_INT,
+ G_TYPE_INT,
+ G_TYPE_INT,
+ G_TYPE_INT);
+
+ pixbuf_loader_signals[CLOSED] =
+ g_signal_new ("closed",
+ G_TYPE_FROM_CLASS (object_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GdkPixbufLoaderClass, closed),
+ NULL, NULL,
+ gdk_pixbuf_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
}
static void
gdk_pixbuf_loader_init (GdkPixbufLoader *loader)
{
- GdkPixbufLoaderPrivate *priv;
+ GdkPixbufLoaderPrivate *priv;
- priv = g_new0 (GdkPixbufLoaderPrivate, 1);
- loader->priv = priv;
+ priv = g_new0 (GdkPixbufLoaderPrivate, 1);
+ loader->priv = priv;
}
static void
gdk_pixbuf_loader_finalize (GObject *object)
{
- GdkPixbufLoader *loader;
- GdkPixbufLoaderPrivate *priv = NULL;
+ GdkPixbufLoader *loader;
+ GdkPixbufLoaderPrivate *priv = NULL;
- loader = GDK_PIXBUF_LOADER (object);
- priv = loader->priv;
+ loader = GDK_PIXBUF_LOADER (object);
+ priv = loader->priv;
- if (!priv->closed)
- g_warning ("GdkPixbufLoader finalized without calling gdk_pixbuf_loader_close() - this is not allowed. You must explicitly end the data stream to the loader before dropping the last reference.");
+ if (!priv->closed)
+ g_warning ("GdkPixbufLoader finalized without calling gdk_pixbuf_loader_close() - this is not allowed. You must explicitly end the data stream to the loader before dropping the last reference.");
- if (priv->animation)
- gdk_pixbuf_animation_unref (priv->animation);
-
- if (priv->pixbuf)
- gdk_pixbuf_unref (priv->pixbuf);
+ if (priv->animation)
+ g_object_unref (priv->animation);
- g_free (priv);
+ g_free (priv);
- G_OBJECT_CLASS (parent_class)->finalize (object);
+ G_OBJECT_CLASS (parent_class)->finalize (object);
}
-static void
-gdk_pixbuf_loader_prepare (GdkPixbuf *pixbuf,
- gpointer loader)
+/**
+ * gdk_pixbuf_loader_set_size:
+ * @loader: A pixbuf loader.
+ * @width: The desired width of the image being loaded.
+ * @height: The desired height of the image being loaded.
+ *
+ * Causes the image to be scaled while it is loaded. The desired
+ * image size can be determined relative to the original size of
+ * the image by calling gdk_pixbuf_loader_set_size() from a
+ * signal handler for the ::size_prepared signal.
+ *
+ * Attempts to set the desired image size are ignored after the
+ * emission of the ::size_prepared signal.
+ *
+ * Since: 2.2
+ */
+void
+gdk_pixbuf_loader_set_size (GdkPixbufLoader *loader,
+ gint width,
+ gint height)
{
- GdkPixbufLoaderPrivate *priv = NULL;
-
- priv = GDK_PIXBUF_LOADER (loader)->priv;
- gdk_pixbuf_ref (pixbuf);
-
- g_assert (priv->pixbuf == NULL);
-
- priv->pixbuf = pixbuf;
- g_signal_emit (G_OBJECT (loader), pixbuf_loader_signals[AREA_PREPARED], 0);
+ GdkPixbufLoaderPrivate *priv = GDK_PIXBUF_LOADER (loader)->priv;
+ g_return_if_fail (width > 0 && height > 0);
+
+ if (!priv->size_fixed)
+ {
+ priv->width = width;
+ priv->height = height;
+ }
}
static void
-gdk_pixbuf_loader_update (GdkPixbuf *pixbuf,
- guint x,
- guint y,
- guint width,
- guint height,
- gpointer loader)
+gdk_pixbuf_loader_size_func (gint *width, gint *height, gpointer loader)
{
- GdkPixbufLoaderPrivate *priv = NULL;
-
- priv = GDK_PIXBUF_LOADER (loader)->priv;
-
- g_signal_emit (G_OBJECT (loader),
- pixbuf_loader_signals[AREA_UPDATED],
- 0,
- x, y,
- /* sanity check in here. Defend against an errant loader */
- MIN (width, gdk_pixbuf_get_width (priv->pixbuf)),
- MIN (height, gdk_pixbuf_get_height (priv->pixbuf)));
+ GdkPixbufLoaderPrivate *priv = GDK_PIXBUF_LOADER (loader)->priv;
+
+ /* allow calling gdk_pixbuf_loader_set_size() before the signal */
+ if (priv->width == 0 && priv->height == 0)
+ {
+ priv->width = *width;
+ priv->height = *height;
+ }
+
+ g_signal_emit (loader, pixbuf_loader_signals[SIZE_PREPARED], 0, *width, *height);
+ priv->size_fixed = TRUE;
+
+ *width = priv->width;
+ *height = priv->height;
}
static void
-gdk_pixbuf_loader_frame_done (GdkPixbufFrame *frame,
- gpointer loader)
+gdk_pixbuf_loader_prepare (GdkPixbuf *pixbuf,
+ GdkPixbufAnimation *anim,
+ gpointer loader)
{
- GdkPixbufLoaderPrivate *priv = NULL;
-
- priv = GDK_PIXBUF_LOADER (loader)->priv;
-
- priv->pixbuf = NULL;
-
- if (priv->animation == NULL)
- {
- priv->animation = g_object_new (GDK_TYPE_PIXBUF_ANIMATION, NULL);
-
- priv->animation->n_frames = 0;
- priv->animation->width = gdk_pixbuf_get_width (frame->pixbuf) + frame->x_offset;
- priv->animation->height = gdk_pixbuf_get_height (frame->pixbuf) + frame->y_offset;
- }
- else
- {
- int w, h;
-
- /* update bbox size */
- w = gdk_pixbuf_get_width (frame->pixbuf) + frame->x_offset;
- h = gdk_pixbuf_get_height (frame->pixbuf) + frame->y_offset;
-
- if (w > priv->animation->width) {
- priv->animation->width = w;
- }
- if (h > priv->animation->height) {
- priv->animation->height = h;
- }
- }
-
- priv->animation->frames = g_list_append (priv->animation->frames, frame);
- priv->animation->n_frames++;
- g_signal_emit (G_OBJECT (loader),
- pixbuf_loader_signals[FRAME_DONE],
- 0,
- frame);
+ GdkPixbufLoaderPrivate *priv = GDK_PIXBUF_LOADER (loader)->priv;
+ g_return_if_fail (pixbuf != NULL);
+
+ if (!priv->size_fixed)
+ {
+ /* Defend against lazy loaders which don't call size_func */
+ gint width = gdk_pixbuf_get_width (pixbuf);
+ gint height = gdk_pixbuf_get_height (pixbuf);
+
+ gdk_pixbuf_loader_size_func (&width, &height, loader);
+ }
+
+ priv->needs_scale = FALSE;
+ if (priv->width > 0 && priv->height > 0 &&
+ (priv->width != gdk_pixbuf_get_width (pixbuf) ||
+ priv->height != gdk_pixbuf_get_height (pixbuf)))
+ priv->needs_scale = TRUE;
+
+ if (anim)
+ g_object_ref (anim);
+ else
+ anim = gdk_pixbuf_non_anim_new (pixbuf);
+
+ priv->animation = anim;
+
+ if (!priv->needs_scale)
+ g_signal_emit (loader, pixbuf_loader_signals[AREA_PREPARED], 0);
}
static void
-gdk_pixbuf_loader_animation_done (GdkPixbuf *pixbuf,
- gpointer loader)
+gdk_pixbuf_loader_update (GdkPixbuf *pixbuf,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ gpointer loader)
{
- GdkPixbufLoaderPrivate *priv = NULL;
- GdkPixbufFrame *frame;
- GList *current = NULL;
- gint h, w;
-
- priv = GDK_PIXBUF_LOADER (loader)->priv;
- priv->pixbuf = NULL;
-
- current = gdk_pixbuf_animation_get_frames (priv->animation);
-
- while (current)
- {
- frame = (GdkPixbufFrame *) current->data;
-
- /* update bbox size */
- w = gdk_pixbuf_get_width (frame->pixbuf) + frame->x_offset;
- h = gdk_pixbuf_get_height (frame->pixbuf) + frame->y_offset;
-
- if (w > priv->animation->width)
- priv->animation->width = w;
- if (h > priv->animation->height)
- priv->animation->height = h;
- current = current->next;
- }
-
- g_signal_emit (G_OBJECT (loader), pixbuf_loader_signals[ANIMATION_DONE], 0);
+ GdkPixbufLoaderPrivate *priv = GDK_PIXBUF_LOADER (loader)->priv;
+
+ if (!priv->needs_scale)
+ g_signal_emit (loader,
+ pixbuf_loader_signals[AREA_UPDATED],
+ 0,
+ x, y,
+ /* sanity check in here. Defend against an errant loader */
+ MIN (width, gdk_pixbuf_animation_get_width (priv->animation)),
+ MIN (height, gdk_pixbuf_animation_get_height (priv->animation)));
}
static gint
const char *image_type,
GError **error)
{
- GdkPixbufLoaderPrivate *priv = loader->priv;
-
- if (image_type)
- {
- priv->image_module = gdk_pixbuf_get_named_module (image_type,
+ GdkPixbufLoaderPrivate *priv = loader->priv;
+
+ if (image_type)
+ {
+ priv->image_module = _gdk_pixbuf_get_named_module (image_type,
+ error);
+ }
+ else
+ {
+ priv->image_module = _gdk_pixbuf_get_module (priv->header_buf,
+ priv->header_buf_offset,
+ NULL,
+ error);
+ }
+
+ if (priv->image_module == NULL)
+ return 0;
+
+ if (priv->image_module->module == NULL)
+ if (!_gdk_pixbuf_load_module (priv->image_module, error))
+ return 0;
+
+ if (priv->image_module->module == NULL)
+ return 0;
+
+ if ((priv->image_module->begin_load == NULL) ||
+ (priv->image_module->stop_load == NULL) ||
+ (priv->image_module->load_increment == NULL))
+ {
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION,
+ _("Incremental loading of image type '%s' is not supported"),
+ priv->image_module->module_name);
+
+ return 0;
+ }
+
+ priv->context = priv->image_module->begin_load (gdk_pixbuf_loader_size_func,
+ gdk_pixbuf_loader_prepare,
+ gdk_pixbuf_loader_update,
+ loader,
error);
- }
- else
- {
- g_return_val_if_fail (priv->header_buf_offset > 0, 0);
- priv->image_module = gdk_pixbuf_get_module (priv->header_buf,
- priv->header_buf_offset,
- NULL,
- error);
- }
-
- if (priv->image_module == NULL)
- return 0;
-
- if (priv->image_module->module == NULL)
- if (!gdk_pixbuf_load_module (priv->image_module, error))
- return 0;
-
- if (priv->image_module->module == NULL)
- return 0;
-
- if ((priv->image_module->begin_load == NULL) ||
- (priv->image_module->stop_load == NULL) ||
- (priv->image_module->load_increment == NULL))
- {
- g_set_error (error,
- GDK_PIXBUF_ERROR,
- GDK_PIXBUF_ERROR_UNSUPPORTED_OPERATION,
- _("Incremental loading of image type '%s' is not supported"),
- image_type);
-
- return 0;
- }
-
- priv->context = priv->image_module->begin_load (gdk_pixbuf_loader_prepare,
- gdk_pixbuf_loader_update,
- gdk_pixbuf_loader_frame_done,
- gdk_pixbuf_loader_animation_done,
- loader,
- error);
-
- if (priv->context == NULL)
- {
- /* Defense against broken loaders; DO NOT take this as a GError
- * example
- */
- if (error && *error == NULL)
- {
- g_warning ("Bug! loader '%s' didn't set an error on failure",
- priv->image_module->module_name);
- g_set_error (error,
- GDK_PIXBUF_ERROR,
- GDK_PIXBUF_ERROR_FAILED,
- _("Internal error: Image loader module '%s'"
- " failed to begin loading an image, but didn't"
- " give a reason for the failure"),
- priv->image_module->module_name);
-
- }
+
+ if (priv->context == NULL)
+ {
+ /* Defense against broken loaders; DO NOT take this as a GError
+ * example
+ */
+ if (error && *error == NULL)
+ {
+ g_warning ("Bug! loader '%s' didn't set an error on failure",
+ priv->image_module->module_name);
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Internal error: Image loader module '%s'"
+ " failed to begin loading an image, but didn't"
+ " give a reason for the failure"),
+ priv->image_module->module_name);
+
+ }
- return 0;
- }
+ return 0;
+ }
- if (priv->header_buf_offset
- && priv->image_module->load_increment (priv->context, priv->header_buf, priv->header_buf_offset, error))
- return priv->header_buf_offset;
+ if (priv->header_buf_offset
+ && priv->image_module->load_increment (priv->context, priv->header_buf, priv->header_buf_offset, error))
+ return priv->header_buf_offset;
- return 0;
+ return 0;
}
static int
gsize count,
GError **error)
{
- gint n_bytes;
- GdkPixbufLoaderPrivate *priv = loader->priv;
+ gint n_bytes;
+ GdkPixbufLoaderPrivate *priv = loader->priv;
- n_bytes = MIN(LOADER_HEADER_SIZE - priv->header_buf_offset, count);
- memcpy (priv->header_buf + priv->header_buf_offset, buf, n_bytes);
+ n_bytes = MIN(LOADER_HEADER_SIZE - priv->header_buf_offset, count);
+ memcpy (priv->header_buf + priv->header_buf_offset, buf, n_bytes);
- priv->header_buf_offset += n_bytes;
+ priv->header_buf_offset += n_bytes;
- if (priv->header_buf_offset >= LOADER_HEADER_SIZE)
- {
- if (gdk_pixbuf_loader_load_module (loader, NULL, error) == 0)
- return 0;
- }
+ if (priv->header_buf_offset >= LOADER_HEADER_SIZE)
+ {
+ if (gdk_pixbuf_loader_load_module (loader, NULL, error) == 0)
+ return 0;
+ }
- return n_bytes;
+ return n_bytes;
}
/**
* @error: return location for errors
*
* This will cause a pixbuf loader to parse the next @count bytes of
- * an image. It will return TRUE if the data was loaded successfully,
- * and FALSE if an error occurred. In the latter case, the loader
- * will be closed, and will not accept further writes. If FALSE is
+ * an image. It will return %TRUE if the data was loaded successfully,
+ * and %FALSE if an error occurred. In the latter case, the loader
+ * will be closed, and will not accept further writes. If %FALSE is
* returned, @error will be set to an error from the #GDK_PIXBUF_ERROR
* or #G_FILE_ERROR domains.
*
- * Return value: #TRUE if the write was successful, or #FALSE if the loader
+ * Return value: %TRUE if the write was successful, or %FALSE if the loader
* cannot parse the buffer.
**/
gboolean
gsize count,
GError **error)
{
- GdkPixbufLoaderPrivate *priv;
-
- g_return_val_if_fail (loader != NULL, FALSE);
- g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), FALSE);
+ GdkPixbufLoaderPrivate *priv;
- g_return_val_if_fail (buf != NULL, FALSE);
- g_return_val_if_fail (count >= 0, FALSE);
+ g_return_val_if_fail (loader != NULL, FALSE);
+ g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), FALSE);
- priv = loader->priv;
+ g_return_val_if_fail (buf != NULL, FALSE);
+ g_return_val_if_fail (count >= 0, FALSE);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
- /* we expect it's not to be closed */
- g_return_val_if_fail (priv->closed == FALSE, FALSE);
+ priv = loader->priv;
+
+ /* we expect it's not to be closed */
+ g_return_val_if_fail (priv->closed == FALSE, FALSE);
- if (priv->image_module == NULL)
- {
- gint eaten;
+ if (priv->image_module == NULL)
+ {
+ gint eaten;
- eaten = gdk_pixbuf_loader_eat_header_write(loader, buf, count, error);
- if (eaten <= 0)
- return FALSE;
+ eaten = gdk_pixbuf_loader_eat_header_write (loader, buf, count, error);
+ if (eaten <= 0)
+ return FALSE;
- count -= eaten;
- buf += eaten;
- }
-
- if (count > 0 && priv->image_module->load_increment)
- {
- gboolean retval;
- retval = priv->image_module->load_increment (priv->context, buf, count,
- error);
- if (!retval && error && *error == NULL)
- {
- /* Fix up busted image loader */
- g_warning ("Bug! loader '%s' didn't set an error on failure",
- priv->image_module->module_name);
- g_set_error (error,
- GDK_PIXBUF_ERROR,
- GDK_PIXBUF_ERROR_FAILED,
- _("Internal error: Image loader module '%s'"
- " failed to begin loading an image, but didn't"
- " give a reason for the failure"),
- priv->image_module->module_name);
- }
-
- return retval;
- }
+ count -= eaten;
+ buf += eaten;
+ }
+
+ if (count > 0 && priv->image_module->load_increment)
+ {
+ gboolean retval;
+ retval = priv->image_module->load_increment (priv->context, buf, count,
+ error);
+ if (!retval && error && *error == NULL)
+ {
+ /* Fix up busted image loader */
+ g_warning ("Bug! loader '%s' didn't set an error on failure",
+ priv->image_module->module_name);
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Internal error: Image loader module '%s'"
+ " failed to begin loading an image, but didn't"
+ " give a reason for the failure"),
+ priv->image_module->module_name);
+ }
+
+ return retval;
+ }
- return TRUE;
+ return TRUE;
}
/**
GdkPixbufLoader *
gdk_pixbuf_loader_new (void)
{
- return g_object_new (GDK_TYPE_PIXBUF_LOADER, NULL);
+ return g_object_new (GDK_TYPE_PIXBUF_LOADER, NULL);
}
/**
* gdk_pixbuf_loader_new_with_type:
+ * @image_type: name of the image format to be loaded with the image
+ * @error: return location for an allocated #GError, or %NULL to ignore errors
*
- * Creates a new pixbuf loader object.
+ * Creates a new pixbuf loader object that always attempts to parse
+ * image data as if it were an image of type @image_type, instead of
+ * identifying the type automatically. Useful if you want an error if
+ * the image isn't the expected type, for loading image formats
+ * that can't be reliably identified by looking at the data, or if
+ * the user manually forces a specific type.
*
* Return value: A newly-created pixbuf loader.
**/
gdk_pixbuf_loader_new_with_type (const char *image_type,
GError **error)
{
- GdkPixbufLoader *retval;
- GError *tmp;
-
- retval = g_object_new (GDK_TYPE_PIXBUF_LOADER, NULL);
+ GdkPixbufLoader *retval;
+ GError *tmp;
+ g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+ retval = g_object_new (GDK_TYPE_PIXBUF_LOADER, NULL);
+
+ tmp = NULL;
+ gdk_pixbuf_loader_load_module (retval, image_type, &tmp);
+ if (tmp != NULL)
+ {
+ g_propagate_error (error, tmp);
+ g_object_unref (retval);
+ return NULL;
+ }
+
+ return retval;
+}
- tmp = NULL;
- gdk_pixbuf_loader_load_module(retval, image_type, &tmp);
- if (tmp != NULL)
- {
- g_propagate_error (error, tmp);
- g_object_unref (G_OBJECT (retval));
- return NULL;
- }
+/**
+ * gdk_pixbuf_loader_new_with_mime_type:
+ * @mime_type: the mime type to be loaded
+ * @error: return location for an allocated #GError, or %NULL to ignore errors
+ *
+ * Creates a new pixbuf loader object that always attempts to parse
+ * image data as if it were an image of mime type @mime_type, instead of
+ * identifying the type automatically. Useful if you want an error if
+ * the image isn't the expected mime type, for loading image formats
+ * that can't be reliably identified by looking at the data, or if
+ * the user manually forces a specific mime type.
+ *
+ * Return value: A newly-created pixbuf loader.
+ * Since: 2.4
+ **/
+GdkPixbufLoader *
+gdk_pixbuf_loader_new_with_mime_type (const char *mime_type,
+ GError **error)
+{
+ const char * image_type = NULL;
+ char ** mimes;
+
+ GdkPixbufLoader *retval;
+ GError *tmp;
+
+ GSList * formats;
+ GdkPixbufFormat *info;
+ int i, j, length;
+
+ formats = gdk_pixbuf_get_formats ();
+ length = g_slist_length (formats);
+
+ for (i = 0; i < length && image_type == NULL; i++) {
+ info = (GdkPixbufFormat *)g_slist_nth_data (formats, i);
+ mimes = info->mime_types;
+
+ for (j = 0; mimes[j] != NULL; j++)
+ if (g_ascii_strcasecmp (mimes[i], mime_type)) {
+ image_type = info->name;
+ break;
+ }
+ }
+
+ g_slist_free (formats);
- return retval;
+ retval = g_object_new (GDK_TYPE_PIXBUF_LOADER, NULL);
+
+ tmp = NULL;
+ gdk_pixbuf_loader_load_module(retval, image_type, &tmp);
+ if (tmp != NULL)
+ {
+ g_propagate_error (error, tmp);
+ g_object_unref (retval);
+ return NULL;
+ }
+
+ return retval;
}
/**
* gdk_pixbuf_loader_get_pixbuf:
* @loader: A pixbuf loader.
*
- * Queries the GdkPixbuf that a pixbuf loader is currently creating.
- * In general it only makes sense to call this function afer the
+ * Queries the #GdkPixbuf that a pixbuf loader is currently creating.
+ * In general it only makes sense to call this function after the
* "area_prepared" signal has been emitted by the loader; this means
* that enough data has been read to know the size of the image that
* will be allocated. If the loader has not received enough data via
- * gdk_pixbuf_loader_write(), then this function returns NULL. The
+ * gdk_pixbuf_loader_write(), then this function returns %NULL. The
* returned pixbuf will be the same in all future calls to the loader,
- * so simply calling gdk_pixbuf_ref() should be sufficient to continue
+ * so simply calling g_object_ref() should be sufficient to continue
* using it. Additionally, if the loader is an animation, it will
- * return the first frame of the animation.
+ * return the "static image" of the animation
+ * (see gdk_pixbuf_animation_get_static_image()).
*
- * Return value: The GdkPixbuf that the loader is creating, or NULL if not
+ * Return value: The #GdkPixbuf that the loader is creating, or %NULL if not
* enough data has been read to determine how to create the image buffer.
**/
GdkPixbuf *
gdk_pixbuf_loader_get_pixbuf (GdkPixbufLoader *loader)
{
- GdkPixbufLoaderPrivate *priv;
+ GdkPixbufLoaderPrivate *priv;
- g_return_val_if_fail (loader != NULL, NULL);
- g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
+ g_return_val_if_fail (loader != NULL, NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
- priv = loader->priv;
+ priv = loader->priv;
- if (priv->animation)
- {
- GList *list;
-
- list = gdk_pixbuf_animation_get_frames (priv->animation);
- if (list != NULL)
- {
- GdkPixbufFrame *frame = list->data;
-
- return gdk_pixbuf_frame_get_pixbuf (frame);
- }
- }
-
- return priv->pixbuf;
+ if (priv->animation)
+ return gdk_pixbuf_animation_get_static_image (priv->animation);
+ else
+ return NULL;
}
/**
* gdk_pixbuf_loader_get_animation:
* @loader: A pixbuf loader
*
- * Queries the GdkPixbufAnimation that a pixbuf loader is currently creating.
- * In general it only makes sense to call this function afer the "area_prepared"
- * signal has been emitted by the loader. If the image is not an animation,
- * then it will return NULL.
+ * Queries the #GdkPixbufAnimation that a pixbuf loader is currently creating.
+ * In general it only makes sense to call this function after the "area_prepared"
+ * signal has been emitted by the loader. If the loader doesn't have enough
+ * bytes yet (hasn't emitted the "area_prepared" signal) this function will
+ * return %NULL.
*
- * Return value: The GdkPixbufAnimation that the loader is loading, or NULL if
+ * Return value: The #GdkPixbufAnimation that the loader is loading, or %NULL if
not enough data has been read to determine the information.
**/
GdkPixbufAnimation *
gdk_pixbuf_loader_get_animation (GdkPixbufLoader *loader)
{
- GdkPixbufLoaderPrivate *priv;
+ GdkPixbufLoaderPrivate *priv;
- g_return_val_if_fail (loader != NULL, NULL);
- g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
+ g_return_val_if_fail (loader != NULL, NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
- priv = loader->priv;
+ priv = loader->priv;
- return priv->animation;
+ return priv->animation;
}
/**
* gdk_pixbuf_loader_write() will occur, so that it can free its
* internal loading structures. Also, tries to parse any data that
* hasn't yet been parsed; if the remaining data is partial or
- * corrupt, an error will be returned. If FALSE is returned, @error
+ * corrupt, an error will be returned. If %FALSE is returned, @error
* will be set to an error from the #GDK_PIXBUF_ERROR or #G_FILE_ERROR
* domains. If you're just cancelling a load rather than expecting it
* to be finished, passing %NULL for @error to ignore it is
gdk_pixbuf_loader_close (GdkPixbufLoader *loader,
GError **error)
{
- GdkPixbufLoaderPrivate *priv;
- gboolean retval = TRUE;
-
- g_return_val_if_fail (loader != NULL, TRUE);
- g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), TRUE);
-
- priv = loader->priv;
-
- /* we expect it's not closed */
- g_return_val_if_fail (priv->closed == FALSE, TRUE);
-
- /* We have less the 128 bytes in the image. Flush it, and keep going. */
- if (priv->image_module == NULL)
- gdk_pixbuf_loader_load_module (loader, NULL, NULL);
-
- if (priv->image_module && priv->image_module->stop_load)
- retval = priv->image_module->stop_load (priv->context, error);
+ GdkPixbufLoaderPrivate *priv;
+ gboolean retval = TRUE;
+
+ g_return_val_if_fail (loader != NULL, TRUE);
+ g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), TRUE);
+ g_return_val_if_fail (error == NULL || *error == NULL, TRUE);
+
+ priv = loader->priv;
+
+ /* we expect it's not closed */
+ g_return_val_if_fail (priv->closed == FALSE, TRUE);
+
+ /* We have less the 128 bytes in the image. Flush it, and keep going. */
+ if (priv->image_module == NULL)
+ {
+ GError *tmp = NULL;
+ gdk_pixbuf_loader_load_module (loader, NULL, &tmp);
+ if (tmp != NULL)
+ {
+ g_propagate_error (error, tmp);
+ retval = FALSE;
+ }
+ }
+
+ if (priv->image_module && priv->image_module->stop_load && priv->context)
+ {
+ if (!priv->image_module->stop_load (priv->context, error))
+ retval = FALSE;
+ }
+
+ priv->closed = TRUE;
+
+ if (priv->needs_scale)
+ {
+ GdkPixbuf *tmp, *pixbuf;
+
+ tmp = gdk_pixbuf_animation_get_static_image (priv->animation);
+ g_object_ref (tmp);
+ pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, tmp->has_alpha, 8, priv->width, priv->height);
+ g_object_unref (priv->animation);
+ priv->animation = gdk_pixbuf_non_anim_new (pixbuf);
+ g_object_unref (pixbuf);
+ g_signal_emit (loader, pixbuf_loader_signals[AREA_PREPARED], 0);
+ gdk_pixbuf_scale (tmp, pixbuf, 0, 0, priv->width, priv->height, 0, 0,
+ (double) priv->width / tmp->width,
+ (double) priv->height / tmp->height,
+ GDK_INTERP_BILINEAR);
+ g_object_unref (tmp);
+
+ g_signal_emit (loader, pixbuf_loader_signals[AREA_UPDATED], 0,
+ 0, 0, priv->width, priv->height);
+ }
+
+
+ g_signal_emit (loader, pixbuf_loader_signals[CLOSED], 0);
+
+ return retval;
+}
+
+/**
+ * gdk_pixbuf_loader_get_format:
+ * @loader: A pixbuf loader.
+ *
+ * Obtains the available information about the format of the
+ * currently loading image file.
+ *
+ * Returns: A #GdkPixbufFormat or %NULL. The return value is owned
+ * by GdkPixbuf and should not be freed.
+ *
+ * Since: 2.2
+ */
+GdkPixbufFormat *
+gdk_pixbuf_loader_get_format (GdkPixbufLoader *loader)
+{
+ GdkPixbufLoaderPrivate *priv;
- priv->closed = TRUE;
+ g_return_val_if_fail (loader != NULL, NULL);
+ g_return_val_if_fail (GDK_IS_PIXBUF_LOADER (loader), NULL);
- g_signal_emit (G_OBJECT (loader), pixbuf_loader_signals[CLOSED], 0);
+ priv = loader->priv;
- return retval;
+ if (priv->image_module)
+ return _gdk_pixbuf_get_format (priv->image_module);
+ else
+ return NULL;
}
+
+
+
+
projects / ~andy / gtk / blobdiff