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 | ␊ |
23 | //Azi:include␊ |
24 | #include "libsa.h"␊ |
25 | //#include "boot.h"␊ |
26 | ␊ |
27 | typedef uint8_t UInt8;␊ |
28 | typedef uint16_t UInt16;␊ |
29 | typedef int8_t SInt8;␊ |
30 | typedef int16_t SInt16;␊ |
31 | ␊ |
32 | static void ␊ |
33 | PreviewDecompress16(uint32_t * compressBuffer, ␊ |
34 | uint32_t width, uint32_t height, uint32_t row, ␊ |
35 | uint16_t * output)␊ |
36 | {␊ |
37 | int i, j;␊ |
38 | uint32_t * input;␊ |
39 | ␊ |
40 | uint16_t * sc0 = malloc((width+2) * sizeof(uint16_t));␊ |
41 | uint16_t * sc1 = malloc((width+2) * sizeof(uint16_t));␊ |
42 | uint16_t * sc2 = malloc((width+2) * sizeof(uint16_t));␊ |
43 | uint16_t * sc3 = malloc((width+2) * sizeof(uint16_t));␊ |
44 | uint32_t sr0, sr1, sr2, sr3;␊ |
45 | ␊ |
46 | bzero(sc0, (width+2) * sizeof(uint16_t));␊ |
47 | bzero(sc1, (width+2) * sizeof(uint16_t));␊ |
48 | bzero(sc2, (width+2) * sizeof(uint16_t));␊ |
49 | bzero(sc3, (width+2) * sizeof(uint16_t));␊ |
50 | ␊ |
51 | uint32_t tmp1, tmp2, out;␊ |
52 | for (j = 0; j < (height + 2); j++)␊ |
53 | {␊ |
54 | input = compressBuffer;␊ |
55 | if (j < height)␊ |
56 | input += j;␊ |
57 | else␊ |
58 | input += height - 1;␊ |
59 | input = (uint32_t *)(input[3] + ((uint8_t *)compressBuffer));␊ |
60 | ␊ |
61 | uint32_t data = 0, repeat = 0, fetch = 0, count = 0;␊ |
62 | sr0 = sr1 = sr2 = sr3 = 0;␊ |
63 | ␊ |
64 | for (i = 0; i < (width + 2); i++)␊ |
65 | {␊ |
66 | if (i < width)␊ |
67 | {␊ |
68 | if (!count)␊ |
69 | {␊ |
70 | count = *input++;␊ |
71 | repeat = (count & 0xff000000);␊ |
72 | count ^= repeat;␊ |
73 | fetch = true;␊ |
74 | }␊ |
75 | else␊ |
76 | fetch = (0 == repeat);␊ |
77 | ␊ |
78 | count--;␊ |
79 | ␊ |
80 | if (fetch)␊ |
81 | {␊ |
82 | ␉␉␉␉␉data = *((uint16_t *)input);␊ |
83 | (*((uint16_t *)input))++;␊ |
84 | ␊ |
85 | // grayscale␊ |
86 | // srgb 13933, 46871, 4732␊ |
87 | // ntsc 19595, 38470, 7471␊ |
88 | data = 13933 * (0x1f & (data >> 10))␊ |
89 | + 46871 * (0x1f & (data >> 5))␊ |
90 | + 4732 * (0x1f & data);␊ |
91 | data >>= 13;␊ |
92 | ␊ |
93 | // 70% white, 30 % black␊ |
94 | data *= 19661;␊ |
95 | data += (103 << 16);␊ |
96 | data >>= 16;␊ |
97 | }␊ |
98 | }␊ |
99 | ␊ |
100 | // gauss blur␊ |
101 | tmp2 = sr0 + data;␊ |
102 | sr0 = data;␊ |
103 | tmp1 = sr1 + tmp2;␊ |
104 | sr1 = tmp2;␊ |
105 | tmp2 = sr2 + tmp1;␊ |
106 | sr2 = tmp1;␊ |
107 | tmp1 = sr3 + tmp2;␊ |
108 | sr3 = tmp2;␊ |
109 | ␊ |
110 | tmp2 = sc0[i] + tmp1;␊ |
111 | sc0[i] = tmp1;␊ |
112 | tmp1 = sc1[i] + tmp2;␊ |
113 | sc1[i] = tmp2;␊ |
114 | tmp2 = sc2[i] + tmp1;␊ |
115 | sc2[i] = tmp1;␊ |
116 | out = (128 + sc3[i] + tmp2) >> 11;␊ |
117 | sc3[i] = tmp2;␊ |
118 | ␊ |
119 | out &= 0x1f;␊ |
120 | if ((i > 1) && (j > 1))␊ |
121 | output[i-2] = out | (out << 5) | (out << 10);␊ |
122 | }␊ |
123 | ␊ |
124 | if (j > 1)␊ |
125 | output += row;␊ |
126 | }␊ |
127 | free(sc3);␊ |
128 | free(sc2);␊ |
129 | free(sc1);␊ |
130 | free(sc0);␊ |
131 | }␊ |
132 | ␊ |
133 | static void ␊ |
134 | PreviewDecompress32(uint32_t * compressBuffer, ␊ |
135 | uint32_t width, uint32_t height, uint32_t row, ␊ |
136 | uint32_t * output)␊ |
137 | {␊ |
138 | int i, j;␊ |
139 | uint32_t * input;␊ |
140 | ␊ |
141 | uint16_t * sc0 = malloc((width+2) * sizeof(uint16_t));␊ |
142 | uint16_t * sc1 = malloc((width+2) * sizeof(uint16_t));␊ |
143 | uint16_t * sc2 = malloc((width+2) * sizeof(uint16_t));␊ |
144 | uint16_t * sc3 = malloc((width+2) * sizeof(uint16_t));␊ |
145 | uint32_t sr0, sr1, sr2, sr3;␊ |
146 | ␊ |
147 | bzero(sc0, (width+2) * sizeof(uint16_t));␊ |
148 | bzero(sc1, (width+2) * sizeof(uint16_t));␊ |
149 | bzero(sc2, (width+2) * sizeof(uint16_t));␊ |
150 | bzero(sc3, (width+2) * sizeof(uint16_t));␊ |
151 | ␊ |
152 | uint32_t tmp1, tmp2, out;␊ |
153 | for (j = 0; j < (height + 2); j++)␊ |
154 | {␊ |
155 | input = compressBuffer;␊ |
156 | if (j < height)␊ |
157 | input += j;␊ |
158 | else␊ |
159 | input += height - 1;␊ |
160 | input = (uint32_t *)(input[3] + ((uint8_t *)compressBuffer));␊ |
161 | ␊ |
162 | uint32_t data = 0, repeat = 0, fetch = 0, count = 0;␊ |
163 | sr0 = sr1 = sr2 = sr3 = 0;␊ |
164 | ␊ |
165 | for (i = 0; i < (width + 2); i++)␊ |
166 | {␊ |
167 | if (i < width)␊ |
168 | {␊ |
169 | if (!count)␊ |
170 | {␊ |
171 | count = *input++;␊ |
172 | repeat = (count & 0xff000000);␊ |
173 | count ^= repeat;␊ |
174 | fetch = true;␊ |
175 | }␊ |
176 | else␊ |
177 | fetch = (0 == repeat);␊ |
178 | ␊ |
179 | count--;␊ |
180 | ␊ |
181 | if (fetch)␊ |
182 | {␊ |
183 | data = *input++;␊ |
184 | ␊ |
185 | // grayscale␊ |
186 | // srgb 13933, 46871, 4732␊ |
187 | // ntsc 19595, 38470, 7471␊ |
188 | data = 13933 * (0xff & (data >> 24))␊ |
189 | + 46871 * (0xff & (data >> 16))␊ |
190 | + 4732 * (0xff & data);␊ |
191 | data >>= 16;␊ |
192 | ␊ |
193 | // 70% white, 30 % black␊ |
194 | data *= 19661;␊ |
195 | data += (103 << 16);␊ |
196 | data >>= 16;␊ |
197 | }␊ |
198 | }␊ |
199 | ␊ |
200 | // gauss blur␊ |
201 | tmp2 = sr0 + data;␊ |
202 | sr0 = data;␊ |
203 | tmp1 = sr1 + tmp2;␊ |
204 | sr1 = tmp2;␊ |
205 | tmp2 = sr2 + tmp1;␊ |
206 | sr2 = tmp1;␊ |
207 | tmp1 = sr3 + tmp2;␊ |
208 | sr3 = tmp2;␊ |
209 | ␊ |
210 | tmp2 = sc0[i] + tmp1;␊ |
211 | sc0[i] = tmp1;␊ |
212 | tmp1 = sc1[i] + tmp2;␊ |
213 | sc1[i] = tmp2;␊ |
214 | tmp2 = sc2[i] + tmp1;␊ |
215 | sc2[i] = tmp1;␊ |
216 | out = (128 + sc3[i] + tmp2) >> 8;␊ |
217 | sc3[i] = tmp2;␊ |
218 | ␊ |
219 | out &= 0xff;␊ |
220 | if ((i > 1) && (j > 1))␊ |
221 | output[i-2] = out | (out << 8) | (out << 16);␊ |
222 | }␊ |
223 | ␊ |
224 | if (j > 1)␊ |
225 | output += row;␊ |
226 | }␊ |
227 | ␊ |
228 | free(sc3);␊ |
229 | free(sc2);␊ |
230 | free(sc1);␊ |
231 | free(sc0);␊ |
232 | }␊ |
233 | ␊ |
234 | void *␊ |
235 | DecompressData(void *srcbase, int *dw, int *dh, int *bitsPerPixel)␊ |
236 | {␊ |
237 | uint32_t * src = (uint32_t *) srcbase;␊ |
238 | ␉void * ret;␊ |
239 | ␊ |
240 | *bitsPerPixel = 8 * ((int) src[0]);␊ |
241 | ␉*dw = (int) src[1];␊ |
242 | ␉*dh = (int) src[2];␊ |
243 | ␉␊ |
244 | ␉ret = malloc ((*dw * *dh * *bitsPerPixel)/ 8);␊ |
245 | ␊ |
246 | switch(*bitsPerPixel)␊ |
247 | {␊ |
248 | case 32:␊ |
249 | PreviewDecompress32((uint32_t *)srcbase, *dw, *dh, *dw, ret);␊ |
250 | return ret;␊ |
251 | case 16:␊ |
252 | PreviewDecompress16((uint32_t *)srcbase, *dw, *dh, *dw, ret);␊ |
253 | return ret;␊ |
254 | default:␊ |
255 | return 0;␊ |
256 | }␊ |
257 | }␊ |
258 | |