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 #include "util/u_pack_color.h"
  36
  37
  38 /**
  39  * Copy 2D rect from one place to another.
  40  * Position and sizes are in pixels.
  41  * src_stride may be negative to do vertical flip of pixels from source.
  42  */
  43 void
  44 util_copy_rect(ubyte * dst,
  45                enum pipe_format format,
  46                unsigned dst_stride,
  47                unsigned dst_x,
  48                unsigned dst_y,
  49                unsigned width,
  50                unsigned height,
  51                const ubyte * src,
  52                int src_stride,
  53                unsigned src_x,
  54                unsigned src_y)
  55 {
  56    unsigned i;
  57    int src_stride_pos = src_stride < 0 ? -src_stride : src_stride;
  58    int blocksize = util_format_get_blocksize(format);
  59    int blockwidth = util_format_get_blockwidth(format);
  60    int blockheight = util_format_get_blockheight(format);
  61
  62    assert(blocksize > 0);
  63    assert(blockwidth > 0);
  64    assert(blockheight > 0);
  65
  66    dst_x /= blockwidth;
  67    dst_y /= blockheight;
  68    width = (width + blockwidth - 1)/blockwidth;
  69    height = (height + blockheight - 1)/blockheight;
  70    src_x /= blockwidth;
  71    src_y /= blockheight;
  72
  73    dst += dst_x * blocksize;
  74    src += src_x * blocksize;
  75    dst += dst_y * dst_stride;
  76    src += src_y * src_stride_pos;
  77    width *= blocksize;
  78
  79    if (width == dst_stride && width == src_stride)
  80       memcpy(dst, src, height * width);
  81    else {
  82       for (i = 0; i < height; i++) {
  83          memcpy(dst, src, width);
  84          dst += dst_stride;
  85          src += src_stride;
  86       }
  87    }
  88 }
  89
  90 void
  91 util_fill_rect(ubyte * dst,
  92                enum pipe_format format,
  93                unsigned dst_stride,
  94                unsigned dst_x,
  95                unsigned dst_y,
  96                unsigned width,
  97                unsigned height,
  98                union util_color *uc)
  99 {
 100    unsigned i, j;
 101    unsigned width_size;
 102    int blocksize = util_format_get_blocksize(format);
 103    int blockwidth = util_format_get_blockwidth(format);
 104    int blockheight = util_format_get_blockheight(format);
 105
 106    assert(blocksize > 0);
 107    assert(blockwidth > 0);
 108    assert(blockheight > 0);
 109
 110    dst_x /= blockwidth;
 111    dst_y /= blockheight;
 112    width = (width + blockwidth - 1)/blockwidth;
 113    height = (height + blockheight - 1)/blockheight;
 114
 115    dst += dst_x * blocksize;
 116    dst += dst_y * dst_stride;
 117    width_size = width * blocksize;
 118
 119    switch (blocksize) {
 120    case 1:
 121       if(dst_stride == width_size)
 122          memset(dst, uc->ub, height * width_size);
 123       else {
 124          for (i = 0; i < height; i++) {
 125             memset(dst, uc->ub, width_size);
 126             dst += dst_stride;
 127          }
 128       }
 129       break;
 130    case 2:
 131       for (i = 0; i < height; i++) {
 132          uint16_t *row = (uint16_t *)dst;
 133          for (j = 0; j < width; j++)
 134             *row++ = uc->us;
 135          dst += dst_stride;
 136       }
 137       break;
 138    case 4:
 139       for (i = 0; i < height; i++) {
 140          uint32_t *row = (uint32_t *)dst;
 141          for (j = 0; j < width; j++)
 142             *row++ = uc->ui;
 143          dst += dst_stride;
 144       }
 145       break;
 146    case 8:
 147    case 12:
 148    case 16:
 149    case 24:
 150    case 32:
 151       for (i = 0; i < height; i++) {
 152          ubyte *row = dst;
 153          for (j = 0; j < width; j++) {
 154             memcpy(row, uc, blocksize);
 155             row += blocksize;
 156          }
 157          dst += dst_stride;
 158       }
 159       break;
 160    default:
 161       assert(0);
 162       break;
 163    }
 164 }