src/gallium/auxiliary/util/u_rect.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  * Rectangle-related helper functions.
  30  */
  31
  32
  33 #include "util/u_format.h"
  34 #include "util/u_rect.h"
  35
  36
  37 /**
  38  * Copy 2D rect from one place to another.
  39  * Position and sizes are in pixels.
  40  * src_stride may be negative to do vertical flip of pixels from source.
  41  */
  42 void
  43 util_copy_rect(ubyte * dst,
  44                enum pipe_format format,
  45                unsigned dst_stride,
  46                unsigned dst_x,
  47                unsigned dst_y,
  48                unsigned width,
  49                unsigned height,
  50                const ubyte * src,
  51                int src_stride,
  52                unsigned src_x,
  53                unsigned src_y)
  54 {
  55    unsigned i;
  56    int src_stride_pos = src_stride < 0 ? -src_stride : src_stride;
  57    int blocksize = util_format_get_blocksize(format);
  58    int blockwidth = util_format_get_blockwidth(format);
  59    int blockheight = util_format_get_blockheight(format);
  60
  61    assert(blocksize > 0);
  62    assert(blockwidth > 0);
  63    assert(blockheight > 0);
  64
  65    dst_x /= blockwidth;
  66    dst_y /= blockheight;
  67    width = (width + blockwidth - 1)/blockwidth;
  68    height = (height + blockheight - 1)/blockheight;
  69    src_x /= blockwidth;
  70    src_y /= blockheight;
  71
  72    dst += dst_x * blocksize;
  73    src += src_x * blocksize;
  74    dst += dst_y * dst_stride;
  75    src += src_y * src_stride_pos;
  76    width *= blocksize;
  77
  78    if (width == dst_stride && width == src_stride)
  79       memcpy(dst, src, height * width);
  80    else {
  81       for (i = 0; i < height; i++) {
  82          memcpy(dst, src, width);
  83          dst += dst_stride;
  84          src += src_stride;
  85       }
  86    }
  87 }
  88
  89 void
  90 util_fill_rect(ubyte * dst,
  91                enum pipe_format format,
  92                unsigned dst_stride,
  93                unsigned dst_x,
  94                unsigned dst_y,
  95                unsigned width,
  96                unsigned height,
  97                uint32_t value)
  98 {
  99    unsigned i, j;
 100    unsigned width_size;
 101    int blocksize = util_format_get_blocksize(format);
 102    int blockwidth = util_format_get_blockwidth(format);
 103    int blockheight = util_format_get_blockheight(format);
 104
 105    assert(blocksize > 0);
 106    assert(blockwidth > 0);
 107    assert(blockheight > 0);
 108
 109    dst_x /= blockwidth;
 110    dst_y /= blockheight;
 111    width = (width + blockwidth - 1)/blockwidth;
 112    height = (height + blockheight - 1)/blockheight;
 113
 114    dst += dst_x * blocksize;
 115    dst += dst_y * dst_stride;
 116    width_size = width * blocksize;
 117
 118    switch (blocksize) {
 119    case 1:
 120       if(dst_stride == width_size)
 121          memset(dst, (ubyte) value, height * width_size);
 122       else {
 123          for (i = 0; i < height; i++) {
 124             memset(dst, (ubyte) value, width_size);
 125             dst += dst_stride;
 126          }
 127       }
 128       break;
 129    case 2:
 130       for (i = 0; i < height; i++) {
 131          uint16_t *row = (uint16_t *)dst;
 132          for (j = 0; j < width; j++)
 133             *row++ = (uint16_t) value;
 134          dst += dst_stride;
 135       }
 136       break;
 137    case 4:
 138       for (i = 0; i < height; i++) {
 139          uint32_t *row = (uint32_t *)dst;
 140          for (j = 0; j < width; j++)
 141             *row++ = value;
 142          dst += dst_stride;
 143       }
 144       break;
 145    default:
 146          assert(0);
 147          break;
 148    }
 149 }