/[projet1]/public/pc/shared_libraries/freeimage/v3.12.0/Source/FreeImage/Conversion8.cpp
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Contents of /public/pc/shared_libraries/freeimage/v3.12.0/Source/FreeImage/Conversion8.cpp

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Revision 126 - (show annotations)
Mon Jul 13 12:20:10 2009 UTC (10 years, 7 months ago) by dbug
File size: 9867 byte(s)
Added some shared libraries (UnitTest++, and FreeImage) to avoid having every single project brings its own libraries.
Ideally people should add them in a way we can upgrade versions without breaking things:
-> public/pc/shared_libraries/library_name/library_version/actuall_content
1 // ==========================================================
2 // Bitmap conversion routines
3 //
4 // Design and implementation by
5 // - Floris van den Berg (flvdberg@wxs.nl)
6 // - Hervé Drolon (drolon@infonie.fr)
7 // - Jani Kajala (janik@remedy.fi)
8 // - Karl-Heinz Bussian (khbussian@moss.de)
9 //
10 // This file is part of FreeImage 3
11 //
12 // COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
13 // OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
14 // THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
15 // OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
16 // CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
17 // THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
18 // SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
19 // PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
20 // THIS DISCLAIMER.
21 //
22 // Use at your own risk!
23 // ==========================================================
24
25 #include "FreeImage.h"
26 #include "Utilities.h"
27
28 // ----------------------------------------------------------
29 // internal conversions X to 8 bits
30 // ----------------------------------------------------------
31
32 void DLL_CALLCONV
33 FreeImage_ConvertLine1To8(BYTE *target, BYTE *source, int width_in_pixels) {
34 for (int cols = 0; cols < width_in_pixels; cols++)
35 target[cols] = (source[cols >> 3] & (0x80 >> (cols & 0x07))) != 0 ? 255 : 0;
36 }
37
38 void DLL_CALLCONV
39 FreeImage_ConvertLine4To8(BYTE *target, BYTE *source, int width_in_pixels) {
40 int count_new = 0;
41 int count_org = 0;
42 BOOL hinibble = TRUE;
43
44 while (count_new < width_in_pixels) {
45 if (hinibble) {
46 target[count_new] = (source[count_org] & 0xF0) >> 4;
47 } else {
48 target[count_new] = (source[count_org] & 0x0F);
49
50 count_org++;
51 }
52
53 hinibble = !hinibble;
54
55 count_new++;
56 }
57 }
58
59 void DLL_CALLCONV
60 FreeImage_ConvertLine16To8_555(BYTE *target, BYTE *source, int width_in_pixels) {
61 WORD *bits = (WORD *)source;
62
63 for (int cols = 0; cols < width_in_pixels; cols++) {
64 target[cols] = GREY((((bits[cols] & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F,
65 (((bits[cols] & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F,
66 (((bits[cols] & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F);
67 }
68 }
69
70 void DLL_CALLCONV
71 FreeImage_ConvertLine16To8_565(BYTE *target, BYTE *source, int width_in_pixels) {
72 WORD *bits = (WORD *)source;
73
74 for (int cols = 0; cols < width_in_pixels; cols++)
75 target[cols] = GREY((((bits[cols] & FI16_565_RED_MASK) >> FI16_565_RED_SHIFT) * 0xFF) / 0x1F,
76 (((bits[cols] & FI16_565_GREEN_MASK) >> FI16_565_GREEN_SHIFT) * 0xFF) / 0x3F,
77 (((bits[cols] & FI16_565_BLUE_MASK) >> FI16_565_BLUE_SHIFT) * 0xFF) / 0x1F);
78 }
79
80 void DLL_CALLCONV
81 FreeImage_ConvertLine24To8(BYTE *target, BYTE *source, int width_in_pixels) {
82 for (int cols = 0; cols < width_in_pixels; cols++) {
83 target[cols] = GREY(source[FI_RGBA_RED], source[FI_RGBA_GREEN], source[FI_RGBA_BLUE]);
84
85 source += 3;
86 }
87 }
88
89 void DLL_CALLCONV
90 FreeImage_ConvertLine32To8(BYTE *target, BYTE *source, int width_in_pixels) {
91 for (int cols = 0; cols < width_in_pixels; cols++) {
92 target[cols] = GREY(source[FI_RGBA_RED], source[FI_RGBA_GREEN], source[FI_RGBA_BLUE]);
93
94 source += 4;
95 }
96 }
97
98 // ----------------------------------------------------------
99 // smart convert X to 8 bits
100 // ----------------------------------------------------------
101
102 FIBITMAP * DLL_CALLCONV
103 FreeImage_ConvertTo8Bits(FIBITMAP *dib) {
104 if(!dib) return NULL;
105
106 const int bpp = FreeImage_GetBPP(dib);
107
108 const FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
109 if((image_type != FIT_BITMAP) && (image_type != FIT_UINT16)) {
110 return NULL;
111 }
112
113 if(bpp != 8) {
114 const int width = FreeImage_GetWidth(dib);
115 const int height = FreeImage_GetHeight(dib);
116 FIBITMAP *new_dib = FreeImage_Allocate(width, height, 8);
117
118 if(new_dib == NULL) {
119 return NULL;
120 }
121
122 // copy metadata from src to dst
123 FreeImage_CloneMetadata(new_dib, dib);
124
125 // Build a greyscale palette (*always* needed for image processing)
126
127 RGBQUAD *new_pal = FreeImage_GetPalette(new_dib);
128
129 for(int i = 0; i < 256; i++) {
130 new_pal[i].rgbRed = (BYTE)i;
131 new_pal[i].rgbGreen = (BYTE)i;
132 new_pal[i].rgbBlue = (BYTE)i;
133 }
134
135 if(image_type == FIT_BITMAP) {
136
137 switch(bpp) {
138 case 1:
139 {
140 if(FreeImage_GetColorType(dib) == FIC_PALETTE) {
141
142 // Copy the palette
143
144 RGBQUAD *old_pal = FreeImage_GetPalette(dib);
145 memcpy(&new_pal[0], &old_pal[0], sizeof(RGBQUAD));
146 memcpy(&new_pal[255], &old_pal[1], sizeof(RGBQUAD));
147
148 }
149 else if(FreeImage_GetColorType(dib) == FIC_MINISWHITE) {
150
151 // Reverse the grayscale palette
152
153 for(int i = 0; i < 256; i++) {
154 new_pal[i].rgbRed = new_pal[i].rgbGreen = new_pal[i].rgbBlue = (BYTE)(255 - i);
155 }
156 }
157
158
159 // Expand and copy the bitmap data
160
161 for (int rows = 0; rows < height; rows++) {
162 FreeImage_ConvertLine1To8(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
163 }
164 return new_dib;
165 }
166
167 case 4 :
168 {
169 if(FreeImage_GetColorType(dib) == FIC_PALETTE) {
170
171 // Copy the palette
172
173 RGBQUAD *old_pal = FreeImage_GetPalette(dib);
174
175 for (int i = 0; i < 16; i++) {
176 new_pal[i].rgbRed = old_pal[i].rgbRed;
177 new_pal[i].rgbGreen = old_pal[i].rgbGreen;
178 new_pal[i].rgbBlue = old_pal[i].rgbBlue;
179 }
180 }
181
182 // Expand and copy the bitmap data
183
184 for (int rows = 0; rows < height; rows++) {
185 FreeImage_ConvertLine4To8(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
186 }
187 return new_dib;
188 }
189
190 case 16 :
191 {
192 // Expand and copy the bitmap data
193
194 for (int rows = 0; rows < height; rows++) {
195 if ((FreeImage_GetRedMask(dib) == FI16_565_RED_MASK) && (FreeImage_GetGreenMask(dib) == FI16_565_GREEN_MASK) && (FreeImage_GetBlueMask(dib) == FI16_565_BLUE_MASK)) {
196 FreeImage_ConvertLine16To8_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
197 } else {
198 FreeImage_ConvertLine16To8_555(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
199 }
200 }
201
202 return new_dib;
203 }
204
205 case 24 :
206 {
207 // Expand and copy the bitmap data
208
209 for (int rows = 0; rows < height; rows++) {
210 FreeImage_ConvertLine24To8(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
211 }
212 return new_dib;
213 }
214
215 case 32 :
216 {
217 // Expand and copy the bitmap data
218
219 for (int rows = 0; rows < height; rows++) {
220 FreeImage_ConvertLine32To8(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
221 }
222 return new_dib;
223 }
224 }
225
226 } else if(image_type == FIT_UINT16) {
227
228 const unsigned src_pitch = FreeImage_GetPitch(dib);
229 const unsigned dst_pitch = FreeImage_GetPitch(new_dib);
230 const BYTE *src_bits = FreeImage_GetBits(dib);
231 BYTE *dst_bits = FreeImage_GetBits(new_dib);
232 for (int rows = 0; rows < height; rows++) {
233 const WORD *src_pixel = (WORD*)src_bits;
234 BYTE *dst_pixel = (BYTE*)dst_bits;
235 for(int cols = 0; cols < width; cols++) {
236 dst_pixel[cols] = (BYTE)(src_pixel[cols] >> 8);
237 }
238 src_bits += src_pitch;
239 dst_bits += dst_pitch;
240 }
241
242 return new_dib;
243
244 }
245
246 } // bpp != 8
247
248 return FreeImage_Clone(dib);
249 }
250
251 FIBITMAP * DLL_CALLCONV
252 FreeImage_ConvertToGreyscale(FIBITMAP *dib) {
253 if(!dib) return NULL;
254
255 const FREE_IMAGE_COLOR_TYPE color_type = FreeImage_GetColorType(dib);
256 const int bpp = FreeImage_GetBPP(dib);
257
258 if((color_type == FIC_PALETTE) || (color_type == FIC_MINISWHITE)) {
259 const int width = FreeImage_GetWidth(dib);
260 const int height = FreeImage_GetHeight(dib);
261 FIBITMAP *new_dib = FreeImage_Allocate(width, height, 8);
262
263 if(new_dib == NULL) {
264 return NULL;
265 }
266
267 // copy metadata from src to dst
268 FreeImage_CloneMetadata(new_dib, dib);
269
270 // Build a greyscale palette
271
272 RGBQUAD *new_pal = FreeImage_GetPalette(new_dib);
273
274 for(int i = 0; i < 256; i++) {
275 new_pal[i].rgbRed = (BYTE)i;
276 new_pal[i].rgbGreen = (BYTE)i;
277 new_pal[i].rgbBlue = (BYTE)i;
278 }
279
280 // allocate a 24-bit buffer
281
282 BYTE *buffer = (BYTE*)malloc( CalculatePitch(CalculateLine(width, 24)) );
283 if(NULL == buffer) {
284 FreeImage_Unload(new_dib);
285 return NULL;
286 }
287
288 // Convert the palette to 24-bit, then to 8-bit
289
290 switch(bpp) {
291 case 1:
292 {
293 for (int rows = 0; rows < height; rows++) {
294 FreeImage_ConvertLine1To24(buffer, FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
295 FreeImage_ConvertLine24To8(FreeImage_GetScanLine(new_dib, rows), buffer, width);
296 }
297 }
298 break;
299
300 case 4:
301 {
302 for (int rows = 0; rows < height; rows++) {
303 FreeImage_ConvertLine4To24(buffer, FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
304 FreeImage_ConvertLine24To8(FreeImage_GetScanLine(new_dib, rows), buffer, width);
305 }
306 }
307 break;
308
309 case 8:
310 {
311 for (int rows = 0; rows < height; rows++) {
312 FreeImage_ConvertLine8To24(buffer, FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
313 FreeImage_ConvertLine24To8(FreeImage_GetScanLine(new_dib, rows), buffer, width);
314 }
315 }
316 break;
317
318 }
319 free(buffer);
320
321 return new_dib;
322
323 }
324
325 // Convert the bitmap to 8-bit greyscale
326 return FreeImage_ConvertTo8Bits(dib);
327 }

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