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
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
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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
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  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
  48    format_desc = util_format_description(format);
  49
  50    assert(x % format_desc->block.width == 0);
  51    assert(y % format_desc->block.height == 0);
  52
  53    src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);
  54    dst_row = dst;
  55
  56    format_desc->unpack_float(dst_row, dst_stride, src_row, src_stride, w, h);
  57 }
  58
  59
  60 void
  61 util_format_write_4f(enum pipe_format format,
  62                      const float *src, unsigned src_stride,
  63                      void *dst, unsigned dst_stride,
  64                      unsigned x, unsigned y, unsigned w, unsigned h)
  65 {
  66    const struct util_format_description *format_desc;
  67    uint8_t *dst_row;
  68    const float *src_row;
  69
  70    format_desc = util_format_description(format);
  71
  72    assert(x % format_desc->block.width == 0);
  73    assert(y % format_desc->block.height == 0);
  74
  75    dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);
  76    src_row = src;
  77
  78    format_desc->pack_float(dst_row, dst_stride, src_row, src_stride, w, h);
  79 }
  80
  81
  82 void
  83 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)
  84 {
  85    const struct util_format_description *format_desc;
  86    const uint8_t *src_row;
  87    uint8_t *dst_row;
  88
  89    format_desc = util_format_description(format);
  90
  91    assert(x % format_desc->block.width == 0);
  92    assert(y % format_desc->block.height == 0);
  93
  94    src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);
  95    dst_row = dst;
  96
  97    format_desc->unpack_8unorm(dst_row, dst_stride, src_row, src_stride, w, h);
  98 }
  99
 100
 101 void
 102 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)
 103 {
 104    const struct util_format_description *format_desc;
 105    uint8_t *dst_row;
 106    const uint8_t *src_row;
 107
 108    format_desc = util_format_description(format);
 109
 110    assert(x % format_desc->block.width == 0);
 111    assert(y % format_desc->block.height == 0);
 112
 113    dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);
 114    src_row = src;
 115
 116    format_desc->pack_8unorm(dst_row, dst_stride, src_row, src_stride, w, h);
 117 }
 118