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