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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   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
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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 #include "u_format_s3tc.h"
  37 #include "u_half.h"
  38
  39
  40 void
  41 util_format_read_4f(enum pipe_format format,
  42                     float *dst, unsigned dst_stride,
  43                     const void *src, unsigned src_stride,
  44                     unsigned x, unsigned y, unsigned w, unsigned h)
  45 {
  46    const struct util_format_description *format_desc;
  47    const uint8_t *src_row;
  48    float *dst_row;
  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
  58    format_desc->unpack_float(dst_row, dst_stride, src_row, src_stride, w, h);
  59 }
  60
  61
  62 void
  63 util_format_write_4f(enum pipe_format format,
  64                      const float *src, unsigned src_stride,
  65                      void *dst, unsigned dst_stride,
  66                      unsigned x, unsigned y, unsigned w, unsigned h)
  67 {
  68    const struct util_format_description *format_desc;
  69    uint8_t *dst_row;
  70    const float *src_row;
  71
  72    format_desc = util_format_description(format);
  73
  74    assert(x % format_desc->block.width == 0);
  75    assert(y % format_desc->block.height == 0);
  76
  77    dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);
  78    src_row = src;
  79
  80    format_desc->pack_float(dst_row, dst_stride, src_row, src_stride, w, h);
  81 }
  82
  83
  84 void
  85 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)
  86 {
  87    const struct util_format_description *format_desc;
  88    const uint8_t *src_row;
  89    uint8_t *dst_row;
  90
  91    format_desc = util_format_description(format);
  92
  93    assert(x % format_desc->block.width == 0);
  94    assert(y % format_desc->block.height == 0);
  95
  96    src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);
  97    dst_row = dst;
  98
  99    format_desc->unpack_8unorm(dst_row, dst_stride, src_row, src_stride, w, h);
 100 }
 101
 102
 103 void
 104 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)
 105 {
 106    const struct util_format_description *format_desc;
 107    uint8_t *dst_row;
 108    const uint8_t *src_row;
 109
 110    format_desc = util_format_description(format);
 111
 112    assert(x % format_desc->block.width == 0);
 113    assert(y % format_desc->block.height == 0);
 114
 115    dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);
 116    src_row = src;
 117
 118    format_desc->pack_8unorm(dst_row, dst_stride, src_row, src_stride, w, h);
 119 }
 120
 121 boolean util_format_inited;
 122
 123 void
 124 util_format_do_init(void)
 125 {
 126    util_format_s3tc_init();
 127 }