1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul 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 "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26 /**
27 * \file texcompress_fxt1.c
28 * GL_3DFX_texture_compression_FXT1 support.
29 */
30
31
32 #include "errors.h"
33 #include "glheader.h"
34
35 #include "image.h"
36 #include "macros.h"
37 #include "mipmap.h"
38 #include "texcompress.h"
39 #include "texcompress_fxt1.h"
40 #include "texstore.h"
41 #include "mtypes.h"
42 #include "util/format/u_format_fxt1.h"
43
44 /**
45 * Compress the user's image to either FXT1_RGB or FXT1_RGBA.
46 */
47 GLboolean
_mesa_texstore_fxt1(TEXSTORE_PARAMS)48 _mesa_texstore_fxt1(TEXSTORE_PARAMS)
49 {
50 const uint8_t *pixels;
51 int32_t srcRowStride;
52 uint8_t *dst;
53 const uint8_t *tempImage = NULL;
54
55 assert(dstFormat == MESA_FORMAT_RGB_FXT1 || dstFormat == MESA_FORMAT_RGBA_FXT1);
56
57 if (srcFormat != GL_RGBA ||
58 srcType != GL_UNSIGNED_BYTE ||
59 ctx->_ImageTransferState ||
60 srcPacking->SwapBytes) {
61 /* convert image to RGBA/uint8_t */
62 uint8_t *tempImageSlices[1];
63 int rgbaRowStride = 4 * srcWidth * sizeof(uint8_t);
64 tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(uint8_t));
65 if (!tempImage)
66 return GL_FALSE; /* out of memory */
67 tempImageSlices[0] = (uint8_t *) tempImage;
68 _mesa_texstore(ctx, dims,
69 baseInternalFormat,
70 MESA_FORMAT_RGBA_UNORM8,
71 rgbaRowStride, tempImageSlices,
72 srcWidth, srcHeight, srcDepth,
73 srcFormat, srcType, srcAddr,
74 srcPacking);
75 pixels = tempImage;
76 srcRowStride = 4 * srcWidth;
77 srcFormat = GL_RGBA;
78 }
79 else {
80 pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
81 srcFormat, srcType, 0, 0);
82
83 srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat,
84 srcType) / sizeof(uint8_t);
85 }
86
87 dst = dstSlices[0];
88
89 if (dstFormat == MESA_FORMAT_RGB_FXT1)
90 util_format_fxt1_rgb_pack_rgba_8unorm(dst, dstRowStride, pixels, srcRowStride, srcWidth, srcHeight);
91 else
92 util_format_fxt1_rgba_pack_rgba_8unorm(dst, dstRowStride, pixels, srcRowStride, srcWidth, srcHeight);
93
94 free((void*) tempImage);
95
96 return GL_TRUE;
97 }
98
99 static void
fetch_rgb_fxt1(const uint8_t * map,int32_t rowStride,int32_t i,int32_t j,float * texel)100 fetch_rgb_fxt1(const uint8_t *map,
101 int32_t rowStride, int32_t i, int32_t j, float *texel)
102 {
103 map += rowStride * (i / 8);
104 map += 16 * (j / 4);
105 util_format_fxt1_rgb_fetch_rgba(texel, map, i & 7, j & 3);
106 }
107
108
109 static void
fetch_rgba_fxt1(const uint8_t * map,int32_t rowStride,int32_t i,int32_t j,float * texel)110 fetch_rgba_fxt1(const uint8_t *map,
111 int32_t rowStride, int32_t i, int32_t j, float *texel)
112 {
113 map += rowStride * (i / 8);
114 map += 16 * (j / 4);
115 util_format_fxt1_rgba_fetch_rgba(texel, map, i & 7, j & 3);
116 }
117
118
119 compressed_fetch_func
_mesa_get_fxt_fetch_func(mesa_format format)120 _mesa_get_fxt_fetch_func(mesa_format format)
121 {
122 switch (format) {
123 case MESA_FORMAT_RGB_FXT1:
124 return fetch_rgb_fxt1;
125 case MESA_FORMAT_RGBA_FXT1:
126 return fetch_rgba_fxt1;
127 default:
128 return NULL;
129 }
130 }
131