src/gallium/auxiliary/util/u_format.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 VMware, Inc.
   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
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  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
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  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  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  * @file
  30  * Pixel format accessor functions.
  31  *
  32  * @author Jose Fonseca <jfonseca@vmware.com>
  33  */
  34
  35 #include "u_format.h"
  36
  37
  38 void
  39 util_format_read_4f(enum pipe_format format,
  40                     float *dst, unsigned dst_stride,
  41                     const void *src, unsigned src_stride,
  42                     unsigned x, unsigned y, unsigned w, unsigned h)
  43 {
  44    const struct util_format_description *format_desc;
  45    const uint8_t *src_row;
  46    float *dst_row;
  47    unsigned row_blocks;
  48    unsigned i;
  49
  50    format_desc = util_format_description(format);
  51
  52    assert(x % format_desc->block.width == 0);
  53    assert(y % format_desc->block.height == 0);
  54
  55    src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);
  56    dst_row = dst;
  57    row_blocks = (w + format_desc->block.width - 1) / format_desc->block.width;
  58
  59    for (i = 0; i < h; i += format_desc->block.height) {
  60       format_desc->unpack_float(dst_row, src_row, row_blocks);
  61       src_row += src_stride;
  62       dst_row += dst_stride/sizeof(*dst_row);
  63    }
  64 }
  65
  66
  67 void
  68 util_format_write_4f(enum pipe_format format,
  69                      const float *src, unsigned src_stride,
  70                      void *dst, unsigned dst_stride,
  71                      unsigned x, unsigned y, unsigned w, unsigned h)
  72 {
  73    const struct util_format_description *format_desc;
  74    uint8_t *dst_row;
  75    const float *src_row;
  76    unsigned row_blocks;
  77    unsigned i;
  78
  79    format_desc = util_format_description(format);
  80
  81    assert(x % format_desc->block.width == 0);
  82    assert(y % format_desc->block.height == 0);
  83
  84    dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);
  85    src_row = src;
  86    row_blocks = (w + format_desc->block.width - 1) / format_desc->block.width;
  87
  88    for (i = 0; i < h; i += format_desc->block.height) {
  89       format_desc->pack_float(dst_row, src_row, row_blocks);
  90       dst_row += dst_stride;
  91       src_row += src_stride/sizeof(*src_row);
  92    }
  93 }
  94
  95
  96 void
  97 util_format_read_4ub(enum pipe_format format, uint8_t *dst, unsigned dst_stride, const void *src, unsigned src_stride, unsigned x, unsigned y, unsigned w, unsigned h)
  98 {
  99    const struct util_format_description *format_desc;
 100    const uint8_t *src_row;
 101    uint8_t *dst_row;
 102    unsigned row_blocks;
 103    unsigned i;
 104
 105    format_desc = util_format_description(format);
 106
 107    assert(x % format_desc->block.width == 0);
 108    assert(y % format_desc->block.height == 0);
 109
 110    src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);
 111    dst_row = dst;
 112    row_blocks = (w + format_desc->block.width - 1) / format_desc->block.width;
 113
 114    for (i = 0; i < h; i += format_desc->block.height) {
 115       format_desc->unpack_8unorm(dst_row, src_row, row_blocks);
 116       src_row += src_stride;
 117       dst_row += dst_stride/sizeof(*dst_row);
 118    }
 119 }
 120
 121
 122 void
 123 util_format_write_4ub(enum pipe_format format, const uint8_t *src, unsigned src_stride, void *dst, unsigned dst_stride, unsigned x, unsigned y, unsigned w, unsigned h)
 124 {
 125    const struct util_format_description *format_desc;
 126    uint8_t *dst_row;
 127    const uint8_t *src_row;
 128    unsigned row_blocks;
 129    unsigned i;
 130
 131    format_desc = util_format_description(format);
 132
 133    assert(x % format_desc->block.width == 0);
 134    assert(y % format_desc->block.height == 0);
 135
 136    dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);
 137    src_row = src;
 138    row_blocks = (w + format_desc->block.width - 1) / format_desc->block.width;
 139
 140    for (i = 0; i < h; i += format_desc->block.height) {
 141       format_desc->pack_8unorm(dst_row, src_row, row_blocks);
 142       dst_row += dst_stride;
 143       src_row += src_stride/sizeof(*src_row);
 144    }
 145 }
 146