Pileus Git - ~andy/gtk/blob - gdk-pixbuf/pixops/pixops.h

   1 /*
   2  * Copyright (C) 2000 Red Hat, Inc
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19 #ifndef PIXOPS_H
  20 #define PIXOPS_H
  21
  22 #include <glib.h>
  23
  24 /* Interpolation modes; must match GdkInterpType */
  25 typedef enum {
  26         PIXOPS_INTERP_NEAREST,
  27         PIXOPS_INTERP_TILES,
  28         PIXOPS_INTERP_BILINEAR,
  29         PIXOPS_INTERP_HYPER
  30 } PixopsInterpType;
  31
  32 /* Scale src_buf from src_width / src_height by factors scale_x, scale_y
  33  * and composite the portion corresponding to
  34  * render_x, render_y, render_width, render_height in the new
  35  * coordinate system into dest_buf starting at 0, 0
  36  */
  37 void _pixops_composite (guchar          *dest_buf,
  38                         int              dest_width,
  39                         int              dest_height,
  40                         int              dest_rowstride,
  41                         int              dest_channels,
  42                         int              dest_has_alpha,
  43                         const guchar    *src_buf,
  44                         int              src_width,
  45                         int              src_height,
  46                         int              src_rowstride,
  47                         int              src_channels,
  48                         int              src_has_alpha,
  49                         int              dest_x,
  50                         int              dest_y,
  51                         int              dest_region_width,
  52                         int              dest_region_height,
  53                         double           offset_x,
  54                         double           offset_y,
  55                         double           scale_x,
  56                         double           scale_y,
  57                         PixopsInterpType interp_type,
  58                         int              overall_alpha);
  59
  60 /* Scale src_buf from src_width / src_height by factors scale_x, scale_y
  61  * and composite the portion corresponding to
  62  * render_x, render_y, render_width, render_height in the new
  63  * coordinate system against a checkboard with checks of size check_size
  64  * of the colors color1 and color2 into dest_buf starting at 0, 0
  65  */
  66 void _pixops_composite_color (guchar          *dest_buf,
  67                               int              dest_width,
  68                               int              dest_height,
  69                               int              dest_rowstride,
  70                               int              dest_channels,
  71                               int              dest_has_alpha,
  72                               const guchar    *src_buf,
  73                               int              src_width,
  74                               int              src_height,
  75                               int              src_rowstride,
  76                               int              src_channels,
  77                               int              src_has_alpha,
  78                               int              dest_x,
  79                               int              dest_y,
  80                               int              dest_region_width,
  81                               int              dest_region_height,
  82                               double           offset_x,
  83                               double           offset_y,
  84                               double           scale_x,
  85                               double           scale_y,
  86                               PixopsInterpType interp_type,
  87                               int              overall_alpha,
  88                               int              check_x,
  89                               int              check_y,
  90                               int              check_size,
  91                               guint32          color1,
  92                               guint32          color2);
  93
  94 /* Scale src_buf from src_width / src_height by factors scale_x, scale_y
  95  * and composite the portion corresponding to
  96  * render_x, render_y, render_width, render_height in the new
  97  * coordinate system into dest_buf starting at 0, 0
  98  */
  99 void _pixops_scale    (guchar          *dest_buf,
 100                        int              dest_width,
 101                        int              dest_height,
 102                        int              dest_rowstride,
 103                        int              dest_channels,
 104                        int              dest_has_alpha,
 105                        const guchar    *src_buf,
 106                        int              src_width,
 107                        int              src_height,
 108                        int              src_rowstride,
 109                        int              src_channels,
 110                        int              src_has_alpha,
 111                        int              dest_x,
 112                        int              dest_y,
 113                        int              dest_region_width,
 114                        int              dest_region_height,
 115                        double           offset_x,
 116                        double           offset_y,
 117                        double           scale_x,
 118                        double           scale_y,
 119                        PixopsInterpType interp_type);
 120 #endif