lp_tile_image.c revision 5e321280c14fa376c44c3eeef67b27160419fc56 
1/**************************************************************************
2 *
3 * Copyright 2010 VMware, Inc.  All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 **************************************************************************/
26
27
28#include "lp_tile_soa.h"
29#include "lp_tile_image.h"
30
31
32#define BYTES_PER_TILE (TILE_SIZE * TILE_SIZE * 4)
33
34
35/**
36 * Convert a tiled image into a linear image.
37 * \param src_stride  source row stride in bytes (bytes per row of tiles)
38 * \param dst_stride  dest row stride in bytes
39 */
40void
41lp_tiled_to_linear(const uint8_t *src,
42                   uint8_t *dst,
43                   unsigned width, unsigned height,
44                   enum pipe_format format,
45                   unsigned src_stride,
46                   unsigned dst_stride)
47{
48   const unsigned tiles_per_row = src_stride / BYTES_PER_TILE;
49   unsigned i, j;
50
51   for (j = 0; j < height; j += TILE_SIZE) {
52      for (i = 0; i < width; i += TILE_SIZE) {
53         unsigned tile_offset =
54            ((j / TILE_SIZE) * tiles_per_row + i / TILE_SIZE);
55         unsigned byte_offset = tile_offset * BYTES_PER_TILE;
56         const uint8_t *src_tile = src + byte_offset;
57
58         lp_tile_write_4ub(format,
59                           src_tile,
60                           dst,
61                           dst_stride,
62                           i, j, TILE_SIZE, TILE_SIZE);
63      }
64   }
65}
66
67
68/**
69 * Convert a linear image into a tiled image.
70 * \param src_stride  source row stride in bytes
71 * \param dst_stride  dest row stride in bytes (bytes per row of tiles)
72 */
73void
74lp_linear_to_tiled(const uint8_t *src,
75                   uint8_t *dst,
76                   unsigned width, unsigned height,
77                   enum pipe_format format,
78                   unsigned src_stride,
79                   unsigned dst_stride)
80{
81   const unsigned tiles_per_row = dst_stride / BYTES_PER_TILE;
82   unsigned i, j;
83
84   for (j = 0; j < height; j += TILE_SIZE) {
85      for (i = 0; i < width; i += TILE_SIZE) {
86         unsigned tile_offset =
87            ((j / TILE_SIZE) * tiles_per_row + i / TILE_SIZE);
88         unsigned byte_offset = tile_offset * BYTES_PER_TILE;
89         uint8_t *dst_tile = dst + byte_offset;
90
91         lp_tile_read_4ub(format,
92                          dst_tile,
93                          src,
94                          src_stride,
95                          i, j, TILE_SIZE, TILE_SIZE);
96      }
97   }
98}
99
100
101/**
102 * For testing only.
103 */
104void
105test_tiled_linear_conversion(uint8_t *data,
106                             enum pipe_format format,
107                             unsigned width, unsigned height,
108                             unsigned stride)
109{
110   /* size in tiles */
111   unsigned wt = (width + TILE_SIZE - 1) / TILE_SIZE;
112   unsigned ht = (height + TILE_SIZE - 1) / TILE_SIZE;
113
114   uint8_t *tiled = malloc(wt * ht * TILE_SIZE * TILE_SIZE * 4);
115
116   unsigned tiled_stride = wt * TILE_SIZE * TILE_SIZE * 4;
117
118   lp_linear_to_tiled(data, tiled, width, height, format,
119                      stride, tiled_stride);
120
121   lp_tiled_to_linear(tiled, data, width, height, format,
122                      tiled_stride, stride);
123
124   free(tiled);
125}
126
127