src/gallium/auxiliary/util/p_util.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * Miscellaneous utility functions.
  30  */
  31
  32
  33 #include "pipe/p_defines.h"
  34 #include "pipe/p_util.h"
  35
  36
  37 /**
  38  * Copy 2D rect from one place to another.
  39  * Position and sizes are in pixels.
  40  */
  41 void
  42 pipe_copy_rect(ubyte * dst,
  43                unsigned cpp,
  44                unsigned dst_pitch,
  45                unsigned dst_x,
  46                unsigned dst_y,
  47                unsigned width,
  48                unsigned height,
  49                const ubyte * src,
  50                int src_pitch,
  51                unsigned src_x,
  52                int src_y)
  53 {
  54    unsigned i;
  55
  56    dst_pitch *= cpp;
  57    src_pitch *= cpp;
  58    dst += dst_x * cpp;
  59    src += src_x * cpp;
  60    dst += dst_y * dst_pitch;
  61    src += src_y * src_pitch;
  62    width *= cpp;
  63
  64    if (width == dst_pitch && width == src_pitch)
  65       memcpy(dst, src, height * width);
  66    else {
  67       for (i = 0; i < height; i++) {
  68          memcpy(dst, src, width);
  69          dst += dst_pitch;
  70          src += src_pitch;
  71       }
  72    }
  73 }