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1999-10-28 Federico Mena Quintero <federico@redhat.com> * src/gdk-pixbuf-render.c (gdk_pixbuf_render_to_drawable): New function to render a portion of a pixbuf to a drawable. Ignores alpha information and takes in a GC. (gdk_pixbuf_render_to_drawable_alpha): New function to render a portion of a pixbuf to a drawable. It automatically creates a GC and a clipping mask for alpha pixbufs.
130 lines
3.7 KiB
C
130 lines
3.7 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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*
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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 <libart_lgpl/art_misc.h>
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#include <libart_lgpl/art_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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#pragma }
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#endif
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/* GdkPixbuf structure */
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typedef struct _GdkPixbuf GdkPixbuf;
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struct _GdkPixbuf {
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/* Reference count */
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int ref_count;
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/* Libart pixbuf */
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ArtPixBuf *art_pixbuf;
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};
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/* Convenience functions */
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ArtPixFormat gdk_pixbuf_get_format (GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_n_channels (GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_has_alpha (GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_bits_per_sample (GdkPixbuf *pixbuf);
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guchar *gdk_pixbuf_get_pixels (GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_width (GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_height (GdkPixbuf *pixbuf);
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int gdk_pixbuf_get_rowstride (GdkPixbuf *pixbuf);
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/* Reference counting */
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void gdk_pixbuf_ref (GdkPixbuf *pixbuf);
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void gdk_pixbuf_unref (GdkPixbuf *pixbuf);
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/* Constructors */
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/* Wrap a libart pixbuf */
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GdkPixbuf *gdk_pixbuf_new_from_art_pixbuf (ArtPixBuf *art_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 (ArtPixFormat format, gboolean has_alpha, int bits_per_sample,
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int width, int height);
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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 (guchar *data, ArtPixFormat format, gboolean has_alpha,
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int width, int height, int rowstride,
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ArtDestroyNotify dfunc, gpointer dfunc_data);
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GdkPixbuf *gdk_pixbuf_new_from_xpm_data (const gchar **data);
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/* Rendering to a drawable */
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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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/* Transformations */
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#if 0
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GdkPixbuf *gdk_pixbuf_scale (const GdkPixbuf *pixbuf, gint w, gint h);
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GdkPixbuf *gdk_pixbuf_rotate (GdkPixbuf *pixbuf, gdouble angle);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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