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Root/branches/iFabio/i386/boot2/bmdecompress.c

Source at commit 214 created 13 years 5 months ago.
By ifabio, update to chameleon trunk 630, and now the pakage folder is the same as blackosx branch, also add Icon "building" into buildpkg script, and add mint theme info into the English localizable.strings.
1/*␊
2 * Copyright (c) 1995-2002 Apple Computer, Inc. All rights reserved.␊
3 *␊
4 * @APPLE_LICENSE_HEADER_START@␊
5 * ␊
6 * The contents of this file constitute Original Code as defined in and␊
7 * are subject to the Apple Public Source License Version 1.1 (the␊
8 * "License"). You may not use this file except in compliance with the␊
9 * License. Please obtain a copy of the License at␊
10 * http://www.apple.com/publicsource and read it before using this file.␊
11 * ␊
12 * This Original Code and all software distributed under the License are␊
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the␊
17 * License for the specific language governing rights and limitations␊
18 * under the License.␊
19 * ␊
20 * @APPLE_LICENSE_HEADER_END@␊
21 */␊
22#include "boot.h"␊
23␊
24typedef uint8_t UInt8;␊
25typedef uint16_t UInt16;␊
26typedef int8_t SInt8;␊
27typedef int16_t SInt16;␊
28␊
29static void ␊
30PreviewDecompress16(uint32_t * compressBuffer, ␊
31 uint32_t width, uint32_t height, uint32_t row, ␊
32 uint16_t * output)␊
33{␊
34 int i, j;␊
35 uint32_t * input;␊
36 ␊
37 uint16_t * sc0 = malloc((width+2) * sizeof(uint16_t));␊
38 uint16_t * sc1 = malloc((width+2) * sizeof(uint16_t));␊
39 uint16_t * sc2 = malloc((width+2) * sizeof(uint16_t));␊
40 uint16_t * sc3 = malloc((width+2) * sizeof(uint16_t));␊
41 uint32_t sr0, sr1, sr2, sr3;␊
42␊
43 bzero(sc0, (width+2) * sizeof(uint16_t));␊
44 bzero(sc1, (width+2) * sizeof(uint16_t));␊
45 bzero(sc2, (width+2) * sizeof(uint16_t));␊
46 bzero(sc3, (width+2) * sizeof(uint16_t));␊
47␊
48 uint32_t tmp1, tmp2, out;␊
49 for (j = 0; j < (height + 2); j++)␊
50 {␊
51 input = compressBuffer;␊
52 if (j < height)␊
53 input += j;␊
54 else␊
55 input += height - 1;␊
56 input = (uint32_t *)(input[3] + ((uint8_t *)compressBuffer));␊
57␊
58 uint32_t data = 0, repeat = 0, fetch = 0, count = 0;␊
59 sr0 = sr1 = sr2 = sr3 = 0;␊
60␊
61 for (i = 0; i < (width + 2); i++)␊
62 {␊
63 if (i < width)␊
64 {␊
65 if (!count)␊
66 {␊
67 count = *input++;␊
68 repeat = (count & 0xff000000);␊
69 count ^= repeat;␊
70 fetch = true;␊
71 }␊
72 else␊
73 fetch = (0 == repeat);␊
74 ␊
75 count--;␊
76 ␊
77 if (fetch)␊
78 {␊
79␉␉␉␉␉data = *((uint16_t *)input);␊
80 (*((uint16_t *)input))++;␊
81 ␊
82 // grayscale␊
83 // srgb 13933, 46871, 4732␊
84 // ntsc 19595, 38470, 7471␊
85 data = 13933 * (0x1f & (data >> 10))␊
86 + 46871 * (0x1f & (data >> 5))␊
87 + 4732 * (0x1f & data);␊
88 data >>= 13;␊
89 ␊
90 // 70% white, 30 % black␊
91 data *= 19661;␊
92 data += (103 << 16);␊
93 data >>= 16;␊
94 }␊
95 }␊
96␊
97 // gauss blur␊
98 tmp2 = sr0 + data;␊
99 sr0 = data;␊
100 tmp1 = sr1 + tmp2;␊
101 sr1 = tmp2;␊
102 tmp2 = sr2 + tmp1;␊
103 sr2 = tmp1;␊
104 tmp1 = sr3 + tmp2;␊
105 sr3 = tmp2;␊
106 ␊
107 tmp2 = sc0[i] + tmp1;␊
108 sc0[i] = tmp1;␊
109 tmp1 = sc1[i] + tmp2;␊
110 sc1[i] = tmp2;␊
111 tmp2 = sc2[i] + tmp1;␊
112 sc2[i] = tmp1;␊
113 out = (128 + sc3[i] + tmp2) >> 11;␊
114 sc3[i] = tmp2;␊
115␊
116 out &= 0x1f;␊
117 if ((i > 1) && (j > 1))␊
118 output[i-2] = out | (out << 5) | (out << 10);␊
119 }␊
120␊
121 if (j > 1)␊
122 output += row;␊
123 }␊
124 free(sc3);␊
125 free(sc2);␊
126 free(sc1);␊
127 free(sc0);␊
128}␊
129␊
130static void ␊
131PreviewDecompress32(uint32_t * compressBuffer, ␊
132 uint32_t width, uint32_t height, uint32_t row, ␊
133 uint32_t * output)␊
134{␊
135 int i, j;␊
136 uint32_t * input;␊
137 ␊
138 uint16_t * sc0 = malloc((width+2) * sizeof(uint16_t));␊
139 uint16_t * sc1 = malloc((width+2) * sizeof(uint16_t));␊
140 uint16_t * sc2 = malloc((width+2) * sizeof(uint16_t));␊
141 uint16_t * sc3 = malloc((width+2) * sizeof(uint16_t));␊
142 uint32_t sr0, sr1, sr2, sr3;␊
143␊
144 bzero(sc0, (width+2) * sizeof(uint16_t));␊
145 bzero(sc1, (width+2) * sizeof(uint16_t));␊
146 bzero(sc2, (width+2) * sizeof(uint16_t));␊
147 bzero(sc3, (width+2) * sizeof(uint16_t));␊
148␊
149 uint32_t tmp1, tmp2, out;␊
150 for (j = 0; j < (height + 2); j++)␊
151 {␊
152 input = compressBuffer;␊
153 if (j < height)␊
154 input += j;␊
155 else␊
156 input += height - 1;␊
157 input = (uint32_t *)(input[3] + ((uint8_t *)compressBuffer));␊
158␊
159 uint32_t data = 0, repeat = 0, fetch = 0, count = 0;␊
160 sr0 = sr1 = sr2 = sr3 = 0;␊
161␊
162 for (i = 0; i < (width + 2); i++)␊
163 {␊
164 if (i < width)␊
165 {␊
166 if (!count)␊
167 {␊
168 count = *input++;␊
169 repeat = (count & 0xff000000);␊
170 count ^= repeat;␊
171 fetch = true;␊
172 }␊
173 else␊
174 fetch = (0 == repeat);␊
175 ␊
176 count--;␊
177 ␊
178 if (fetch)␊
179 {␊
180 data = *input++;␊
181 ␊
182 // grayscale␊
183 // srgb 13933, 46871, 4732␊
184 // ntsc 19595, 38470, 7471␊
185 data = 13933 * (0xff & (data >> 24))␊
186 + 46871 * (0xff & (data >> 16))␊
187 + 4732 * (0xff & data);␊
188 data >>= 16;␊
189 ␊
190 // 70% white, 30 % black␊
191 data *= 19661;␊
192 data += (103 << 16);␊
193 data >>= 16;␊
194 }␊
195 }␊
196␊
197 // gauss blur␊
198 tmp2 = sr0 + data;␊
199 sr0 = data;␊
200 tmp1 = sr1 + tmp2;␊
201 sr1 = tmp2;␊
202 tmp2 = sr2 + tmp1;␊
203 sr2 = tmp1;␊
204 tmp1 = sr3 + tmp2;␊
205 sr3 = tmp2;␊
206 ␊
207 tmp2 = sc0[i] + tmp1;␊
208 sc0[i] = tmp1;␊
209 tmp1 = sc1[i] + tmp2;␊
210 sc1[i] = tmp2;␊
211 tmp2 = sc2[i] + tmp1;␊
212 sc2[i] = tmp1;␊
213 out = (128 + sc3[i] + tmp2) >> 8;␊
214 sc3[i] = tmp2;␊
215␊
216 out &= 0xff;␊
217 if ((i > 1) && (j > 1))␊
218 output[i-2] = out | (out << 8) | (out << 16);␊
219 }␊
220␊
221 if (j > 1)␊
222 output += row;␊
223 }␊
224␊
225 free(sc3);␊
226 free(sc2);␊
227 free(sc1);␊
228 free(sc0);␊
229}␊
230␊
231void *␊
232DecompressData(void *srcbase, int *dw, int *dh, int *bitsPerPixel)␊
233{␊
234 uint32_t * src = (uint32_t *) srcbase;␊
235␉void * ret;␊
236␊
237 *bitsPerPixel = 8 * ((int) src[0]);␊
238␉*dw = (int) src[1];␊
239␉*dh = (int) src[2];␊
240␉␊
241␉ret = malloc ((*dw * *dh * *bitsPerPixel)/ 8);␊
242␊
243 switch(*bitsPerPixel)␊
244 {␊
245 case 32:␊
246 PreviewDecompress32((uint32_t *)srcbase, *dw, *dh, *dw, ret);␊
247 return ret;␊
248 case 16:␊
249 PreviewDecompress16((uint32_t *)srcbase, *dw, *dh, *dw, ret);␊
250 return ret;␊
251 default:␊
252 return 0;␊
253 }␊
254}␊
255

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