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1 /*
2  * Copyright (c) 2012-2015 Etnaviv Project
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sub license,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the
12  * next paragraph) shall be included in all copies or substantial portions
13  * of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  *    Wladimir J. van der Laan <laanwj@gmail.com>
25  */
26 
27 #include "etnaviv_tiling.h"
28 
29 #include <stdint.h>
30 #include <stdio.h>
31 
32 #define TEX_TILE_WIDTH (4)
33 #define TEX_TILE_HEIGHT (4)
34 #define TEX_TILE_WORDS (TEX_TILE_WIDTH * TEX_TILE_HEIGHT)
35 
36 #define DO_TILE(type)                                                   \
37    src_stride /= sizeof(type);                                          \
38    dst_stride = (dst_stride * TEX_TILE_HEIGHT) / sizeof(type);          \
39    for (unsigned srcy = 0; srcy < height; ++srcy) {                     \
40       unsigned dsty = basey + srcy;                                     \
41       unsigned ty = (dsty / TEX_TILE_HEIGHT) * dst_stride +             \
42                     (dsty % TEX_TILE_HEIGHT) * TEX_TILE_WIDTH;          \
43       for (unsigned srcx = 0; srcx < width; ++srcx) {                   \
44          unsigned dstx = basex + srcx;                                  \
45          ((type *)dest)[ty + (dstx / TEX_TILE_WIDTH) * TEX_TILE_WORDS + \
46                         (dstx % TEX_TILE_WIDTH)] =                      \
47             ((type *)src)[srcy * src_stride + srcx];                    \
48       }                                                                 \
49    }
50 
51 #define DO_UNTILE(type)                                                   \
52    src_stride = (src_stride * TEX_TILE_HEIGHT) / sizeof(type);            \
53    dst_stride /= sizeof(type);                                            \
54    for (unsigned dsty = 0; dsty < height; ++dsty) {                       \
55       unsigned srcy = basey + dsty;                                       \
56       unsigned sy = (srcy / TEX_TILE_HEIGHT) * src_stride +               \
57                     (srcy % TEX_TILE_HEIGHT) * TEX_TILE_WIDTH;            \
58       for (unsigned dstx = 0; dstx < width; ++dstx) {                     \
59          unsigned srcx = basex + dstx;                                    \
60          ((type *)dest)[dsty * dst_stride + dstx] =                       \
61             ((type *)src)[sy + (srcx / TEX_TILE_WIDTH) * TEX_TILE_WORDS + \
62                           (srcx % TEX_TILE_WIDTH)];                       \
63       }                                                                   \
64    }
65 
66 void
etna_texture_tile(void * dest,void * src,unsigned basex,unsigned basey,unsigned dst_stride,unsigned width,unsigned height,unsigned src_stride,unsigned elmtsize)67 etna_texture_tile(void *dest, void *src, unsigned basex, unsigned basey,
68                   unsigned dst_stride, unsigned width, unsigned height,
69                   unsigned src_stride, unsigned elmtsize)
70 {
71    if (elmtsize == 4) {
72       DO_TILE(uint32_t)
73    } else if (elmtsize == 2) {
74       DO_TILE(uint16_t)
75    } else if (elmtsize == 1) {
76       DO_TILE(uint8_t)
77    } else {
78       printf("etna_texture_tile: unhandled element size %i\n", elmtsize);
79    }
80 }
81 
82 void
etna_texture_untile(void * dest,void * src,unsigned basex,unsigned basey,unsigned src_stride,unsigned width,unsigned height,unsigned dst_stride,unsigned elmtsize)83 etna_texture_untile(void *dest, void *src, unsigned basex, unsigned basey,
84                     unsigned src_stride, unsigned width, unsigned height,
85                     unsigned dst_stride, unsigned elmtsize)
86 {
87    if (elmtsize == 4) {
88       DO_UNTILE(uint32_t);
89    } else if (elmtsize == 2) {
90       DO_UNTILE(uint16_t);
91    } else if (elmtsize == 1) {
92       DO_UNTILE(uint8_t);
93    } else {
94       printf("etna_texture_tile: unhandled element size %i\n", elmtsize);
95    }
96 }
97