research.m1stereo.tv/gitweb/ - melted/blob - src/modules/gtk2/pixops.h

   1 /* GdkPixbuf library - Scaling and compositing functions
   2  *
   3  * Original:
   4  * Copyright (C) 2000 Red Hat, Inc
   5  * Author: Owen Taylor <otaylor@redhat.com>
   6  *
   7  * Modification for MLT:
   8  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   9  * Author: Dan Dennedy <dan@dennedy.org>
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the
  23  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24  * Boston, MA 02111-1307, USA.
  25  */
  26
  27 #ifndef PIXOPS_H
  28 #define PIXOPS_H
  29
  30 #include <glib.h>
  31
  32 /* Interpolation modes; must match GdkInterpType */
  33 typedef enum {
  34         PIXOPS_INTERP_NEAREST,
  35         PIXOPS_INTERP_TILES,
  36         PIXOPS_INTERP_BILINEAR,
  37         PIXOPS_INTERP_HYPER
  38 } PixopsInterpType;
  39
  40 /* Scale src_buf from src_width / src_height by factors scale_x, scale_y
  41  * and composite the portion corresponding to
  42  * render_x, render_y, render_width, render_height in the new
  43  * coordinate system into dest_buf starting at 0, 0
  44  */
  45 void yuv422_scale     (guchar         *dest_buf,
  46                        int             render_x0,
  47                        int             render_y0,
  48                        int             render_x1,
  49                        int             render_y1,
  50                        int             dest_rowstride,
  51                        int             dest_channels,
  52                        int             dest_has_alpha,
  53                        const guchar   *src_buf,
  54                        int             src_width,
  55                        int             src_height,
  56                        int             src_rowstride,
  57                        int             src_channels,
  58                        int             src_has_alpha,
  59                        double          scale_x,
  60                        double          scale_y,
  61                        PixopsInterpType   interp_type);
  62
  63 #define yuv422_scale_simple( dest_buf, dest_width, dest_height, dest_rowstride, src_buf, src_width, src_height, src_rowstride, interp_type ) \
  64         yuv422_scale( (dest_buf), 0, 0, \
  65                 (dest_width), (dest_height), \
  66                 (dest_rowstride), 2, 0, \
  67                 (src_buf), (src_width), (src_height), \
  68                 (src_rowstride), 2, 0, \
  69                 (double) (dest_width) / (src_width), (double) (dest_height) / (src_height), \
  70                 (PixopsInterpType) interp_type );
  71
  72 #endif