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Your eyes are bloodshot. Your mouth starts to foam. Your hands are shaking. You know your need your fix. NEED MORE ABSTRACTION! 2000-04-12 Federico Mena Quintero <federico@helixcode.com> This comes from an excellent idea by Tim Janik (timj@gtk.org) to hook to the last unref operation. * gdk-pixbuf/gdk-pixbuf.c (gdk_pixbuf_set_last_unref_handler): New function to set the last unref handler for a pixbuf. (gdk_pixbuf_finalize): New function to actually finalize a pixbuf. It calls the pixbuf's destroy notification function and frees the GdkPixbuf structure itself. (gdk_pixbuf_unref): Use the last unref function of the pixbuf if available. * gdk-pixbuf/gdk-pixbuf-private.h (struct _GdkPixbuf): New fields for the last unref handler and its user data. * gdk-pixbuf/gdk-pixbuf-data.c (gdk_pixbuf_new_from_data): Use g_new0() to allocate the pixbuf. * gdk-pixbuf/gdk-pixbuf-loader.c (gdk_pixbuf_loader_class_init): Fixed the call to gtk_signal_new() for the "frame_done" signal; it was not specifying the `frame' argument. * gdk-pixbuf/gdk-pixbuf-animation.c (gdk_pixbuf_animation_get_width): Fixed docstring. (gdk_pixbuf_animation_get_height): Likewise. (gdk_pixbuf_animation_get_num_frames): Likewise. (gdk_pixbuf_animation_get_frames): Likewise. * doc/gdk-pixbuf-sections.txt: Updated with the new functions and types. * doc/tmpl/gdk-pixbuf.sgml: Added the description for GdkColorspace. * doc/tmpl/scaling.sgml: Added the description for GdkInterpType. * doc/tmpl/refcounting.sgml: Updated with the information about the last unref handler. * doc/tmpl/*.sgml: Markup tweaks. * gdk-pixbuf/Makefile.am (libgnomecanvaspixbuf_la_LDFLAGS): Sigh, update the libtool version number for libgnomecanvaspixbuf as well. (libpixbufloader_*_la_LDFLAGS): The loaders need to be versioned as well, or the old ones won't work with the new stuff. Also, renamed the modules as follows. * gdk-pixbuf/gdk-pixbuf-io.c (gdk_pixbuf_load_module): Now the modules are called "libpixbufloader-<format>.so" instead of "libpixbuf-<format>.so". They needed renaming so that the new loaders won't overwrite the old ones; even with the versioning stuff, the new .so symlink to the .so.1.0.0 would overwrite the old real .so file.
267 lines
8.4 KiB
C
267 lines
8.4 KiB
C
/* GdkPixbuf library - Main header file
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*
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* Copyright (C) 1999 The Free Software Foundation
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*
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* Authors: Mark Crichton <crichton@gimp.org>
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* Miguel de Icaza <miguel@gnu.org>
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* Federico Mena-Quintero <federico@gimp.org>
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* Havoc Pennington <hp@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef GDK_PIXBUF_H
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#define GDK_PIXBUF_H
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#include <gdk/gdk.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <gdk-pixbuf/gdk-pixbuf-features.h>
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/* Color spaces; right now only RGB is supported */
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typedef enum {
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GDK_COLORSPACE_RGB
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} GdkColorspace;
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/* All of these are opaque structures */
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typedef struct _GdkPixbuf GdkPixbuf;
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typedef struct _GdkPixbufFrame GdkPixbufFrame;
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typedef struct _GdkPixbufAnimation GdkPixbufAnimation;
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/* Handler that must free the pixel array */
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typedef void (* GdkPixbufDestroyNotify) (guchar *pixels, gpointer data);
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/* Handler for the last unref operation */
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typedef void (* GdkPixbufLastUnref) (GdkPixbuf *pixbuf, gpointer data);
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/* Reference counting */
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GdkPixbuf *gdk_pixbuf_ref (GdkPixbuf *pixbuf);
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void gdk_pixbuf_unref (GdkPixbuf *pixbuf);
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void gdk_pixbuf_set_last_unref_handler (GdkPixbuf *pixbuf,
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GdkPixbufLastUnref last_unref_fn,
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gpointer last_unref_fn_data);
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void gdk_pixbuf_finalize (GdkPixbuf *pixbuf);
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/* GdkPixbuf accessors */
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GdkColorspace gdk_pixbuf_get_colorspace (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_n_channels (const GdkPixbuf *pixbuf);
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gboolean gdk_pixbuf_get_has_alpha (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_bits_per_sample (const GdkPixbuf *pixbuf);
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guchar *gdk_pixbuf_get_pixels (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_width (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_height (const GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_rowstride (const GdkPixbuf *pixbuf);
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/* Create a blank pixbuf with an optimal rowstride and a new buffer */
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GdkPixbuf *gdk_pixbuf_new (GdkColorspace colorspace, gboolean has_alpha, int bits_per_sample,
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int width, int height);
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/* Copy a pixbuf */
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GdkPixbuf *gdk_pixbuf_copy (const GdkPixbuf *pixbuf);
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/* Simple loading */
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GdkPixbuf *gdk_pixbuf_new_from_file (const char *filename);
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GdkPixbuf *gdk_pixbuf_new_from_data (const guchar *data,
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GdkColorspace colorspace,
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gboolean has_alpha,
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int bits_per_sample,
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int width, int height,
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int rowstride,
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GdkPixbufDestroyNotify destroy_fn,
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gpointer destroy_fn_data);
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GdkPixbuf *gdk_pixbuf_new_from_xpm_data (const char **data);
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/* Adding an alpha channel */
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GdkPixbuf *gdk_pixbuf_add_alpha (const GdkPixbuf *pixbuf, gboolean substitute_color,
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guchar r, guchar g, guchar b);
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/* Copy an area of a pixbuf onto another one */
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void gdk_pixbuf_copy_area (const GdkPixbuf *src_pixbuf,
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int src_x, int src_y,
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int width, int height,
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GdkPixbuf *dest_pixbuf,
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int dest_x, int dest_y);
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/* Rendering to a drawable */
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/* Alpha compositing mode */
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typedef enum {
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GDK_PIXBUF_ALPHA_BILEVEL,
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GDK_PIXBUF_ALPHA_FULL
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} GdkPixbufAlphaMode;
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void gdk_pixbuf_render_threshold_alpha (GdkPixbuf *pixbuf, GdkBitmap *bitmap,
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int src_x, int src_y,
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int dest_x, int dest_y,
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int width, int height,
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int alpha_threshold);
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void gdk_pixbuf_render_to_drawable (GdkPixbuf *pixbuf,
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GdkDrawable *drawable, GdkGC *gc,
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int src_x, int src_y,
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int dest_x, int dest_y,
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int width, int height,
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GdkRgbDither dither,
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int x_dither, int y_dither);
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void gdk_pixbuf_render_to_drawable_alpha (GdkPixbuf *pixbuf, GdkDrawable *drawable,
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int src_x, int src_y,
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int dest_x, int dest_y,
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int width, int height,
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GdkPixbufAlphaMode alpha_mode,
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int alpha_threshold,
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GdkRgbDither dither,
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int x_dither, int y_dither);
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void gdk_pixbuf_render_pixmap_and_mask (GdkPixbuf *pixbuf,
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GdkPixmap **pixmap_return, GdkBitmap **mask_return,
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int alpha_threshold);
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/* Fetching a region from a drawable */
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GdkPixbuf *gdk_pixbuf_get_from_drawable (GdkPixbuf *dest,
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GdkDrawable *src, GdkColormap *cmap,
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int src_x, int src_y,
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int dest_x, int dest_y,
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int width, int height);
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/* Scaling */
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/* Interpolation modes */
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typedef enum {
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GDK_INTERP_NEAREST,
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GDK_INTERP_TILES,
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GDK_INTERP_BILINEAR,
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GDK_INTERP_HYPER
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} GdkInterpType;
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void gdk_pixbuf_scale (const GdkPixbuf *src,
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GdkPixbuf *dest,
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int dest_x,
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int dest_y,
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int dest_width,
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int dest_height,
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double offset_x,
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double offset_y,
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double scale_x,
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double scale_y,
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GdkInterpType interp_type);
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void gdk_pixbuf_composite (const GdkPixbuf *src,
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GdkPixbuf *dest,
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int dest_x,
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int dest_y,
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int dest_width,
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int dest_height,
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double offset_x,
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double offset_y,
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double scale_x,
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double scale_y,
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GdkInterpType interp_type,
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int overall_alpha);
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void gdk_pixbuf_composite_color (const GdkPixbuf *src,
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GdkPixbuf *dest,
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int dest_x,
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int dest_y,
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int dest_width,
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int dest_height,
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double offset_x,
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double offset_y,
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double scale_x,
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double scale_y,
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GdkInterpType interp_type,
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int overall_alpha,
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int check_x,
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int check_y,
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int check_size,
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guint32 color1,
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guint32 color2);
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GdkPixbuf *gdk_pixbuf_scale_simple (const GdkPixbuf *src,
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int dest_width,
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int dest_height,
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GdkInterpType interp_type);
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GdkPixbuf *gdk_pixbuf_composite_color_simple (const GdkPixbuf *src,
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int dest_width,
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int dest_height,
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GdkInterpType interp_type,
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int overall_alpha,
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int check_size,
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guint32 color1,
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guint32 color2);
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/* Animation support */
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/* GIF-like animation overlay modes for frames */
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typedef enum {
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GDK_PIXBUF_FRAME_RETAIN,
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GDK_PIXBUF_FRAME_DISPOSE,
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GDK_PIXBUF_FRAME_REVERT
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} GdkPixbufFrameAction;
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GdkPixbufAnimation *gdk_pixbuf_animation_new_from_file (const char *filename);
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GdkPixbufAnimation *gdk_pixbuf_animation_ref (GdkPixbufAnimation *animation);
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void gdk_pixbuf_animation_unref (GdkPixbufAnimation *animation);
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int gdk_pixbuf_animation_get_width (GdkPixbufAnimation *animation);
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int gdk_pixbuf_animation_get_height (GdkPixbufAnimation *animation);
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GList *gdk_pixbuf_animation_get_frames (GdkPixbufAnimation *animation);
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int gdk_pixbuf_animation_get_num_frames (GdkPixbufAnimation *animation);
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/* Frame accessors */
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GdkPixbuf *gdk_pixbuf_frame_get_pixbuf (GdkPixbufFrame *frame);
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int gdk_pixbuf_frame_get_x_offset (GdkPixbufFrame *frame);
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int gdk_pixbuf_frame_get_y_offset (GdkPixbufFrame *frame);
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int gdk_pixbuf_frame_get_delay_time (GdkPixbufFrame *frame);
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GdkPixbufFrameAction gdk_pixbuf_frame_get_action (GdkPixbufFrame *frame);
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/* General (presently empty) initialization hooks, primarily for gnome-libs */
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void gdk_pixbuf_preinit (gpointer app, gpointer modinfo);
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void gdk_pixbuf_postinit (gpointer app, gpointer modinfo);
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#ifdef __cplusplus
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}
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#endif
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#endif
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