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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/common/image.cpp | |
3 | // Purpose: wxImage | |
4 | // Author: Robert Roebling | |
5 | // RCS-ID: $Id$ | |
6 | // Copyright: (c) Robert Roebling | |
7 | // Licence: wxWindows licence | |
8 | ///////////////////////////////////////////////////////////////////////////// | |
9 | ||
10 | // For compilers that support precompilation, includes "wx.h". | |
11 | #include "wx/wxprec.h" | |
12 | ||
13 | #ifdef __BORLANDC__ | |
14 | #pragma hdrstop | |
15 | #endif | |
16 | ||
17 | #if wxUSE_IMAGE | |
18 | ||
19 | #include "wx/image.h" | |
20 | ||
21 | #ifndef WX_PRECOMP | |
22 | #include "wx/log.h" | |
23 | #include "wx/hash.h" | |
24 | #include "wx/utils.h" | |
25 | #include "wx/math.h" | |
26 | #include "wx/module.h" | |
27 | #include "wx/palette.h" | |
28 | #include "wx/intl.h" | |
29 | #endif | |
30 | ||
31 | #include "wx/filefn.h" | |
32 | #include "wx/wfstream.h" | |
33 | #include "wx/xpmdecod.h" | |
34 | ||
35 | // For memcpy | |
36 | #include <string.h> | |
37 | ||
38 | // make the code compile with either wxFile*Stream or wxFFile*Stream: | |
39 | #define HAS_FILE_STREAMS (wxUSE_STREAMS && (wxUSE_FILE || wxUSE_FFILE)) | |
40 | ||
41 | #if HAS_FILE_STREAMS | |
42 | #if wxUSE_FFILE | |
43 | typedef wxFFileInputStream wxImageFileInputStream; | |
44 | typedef wxFFileOutputStream wxImageFileOutputStream; | |
45 | #elif wxUSE_FILE | |
46 | typedef wxFileInputStream wxImageFileInputStream; | |
47 | typedef wxFileOutputStream wxImageFileOutputStream; | |
48 | #endif // wxUSE_FILE/wxUSE_FFILE | |
49 | #endif // HAS_FILE_STREAMS | |
50 | ||
51 | #if wxUSE_VARIANT | |
52 | IMPLEMENT_VARIANT_OBJECT_EXPORTED_SHALLOWCMP(wxImage,WXDLLEXPORT) | |
53 | #endif | |
54 | ||
55 | //----------------------------------------------------------------------------- | |
56 | // wxImage | |
57 | //----------------------------------------------------------------------------- | |
58 | ||
59 | class wxImageRefData: public wxObjectRefData | |
60 | { | |
61 | public: | |
62 | wxImageRefData(); | |
63 | virtual ~wxImageRefData(); | |
64 | ||
65 | int m_width; | |
66 | int m_height; | |
67 | unsigned char *m_data; | |
68 | ||
69 | bool m_hasMask; | |
70 | unsigned char m_maskRed,m_maskGreen,m_maskBlue; | |
71 | ||
72 | // alpha channel data, may be NULL for the formats without alpha support | |
73 | unsigned char *m_alpha; | |
74 | ||
75 | bool m_ok; | |
76 | ||
77 | // if true, m_data is pointer to static data and shouldn't be freed | |
78 | bool m_static; | |
79 | ||
80 | // same as m_static but for m_alpha | |
81 | bool m_staticAlpha; | |
82 | ||
83 | #if wxUSE_PALETTE | |
84 | wxPalette m_palette; | |
85 | #endif // wxUSE_PALETTE | |
86 | ||
87 | wxArrayString m_optionNames; | |
88 | wxArrayString m_optionValues; | |
89 | ||
90 | DECLARE_NO_COPY_CLASS(wxImageRefData) | |
91 | }; | |
92 | ||
93 | wxImageRefData::wxImageRefData() | |
94 | { | |
95 | m_width = 0; | |
96 | m_height = 0; | |
97 | m_data = | |
98 | m_alpha = (unsigned char *) NULL; | |
99 | ||
100 | m_maskRed = 0; | |
101 | m_maskGreen = 0; | |
102 | m_maskBlue = 0; | |
103 | m_hasMask = false; | |
104 | ||
105 | m_ok = false; | |
106 | m_static = | |
107 | m_staticAlpha = false; | |
108 | } | |
109 | ||
110 | wxImageRefData::~wxImageRefData() | |
111 | { | |
112 | if ( !m_static ) | |
113 | free( m_data ); | |
114 | if ( !m_staticAlpha ) | |
115 | free( m_alpha ); | |
116 | } | |
117 | ||
118 | wxList wxImage::sm_handlers; | |
119 | ||
120 | wxImage wxNullImage; | |
121 | ||
122 | //----------------------------------------------------------------------------- | |
123 | ||
124 | #define M_IMGDATA wx_static_cast(wxImageRefData*, m_refData) | |
125 | ||
126 | IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) | |
127 | ||
128 | wxImage::wxImage( int width, int height, bool clear ) | |
129 | { | |
130 | Create( width, height, clear ); | |
131 | } | |
132 | ||
133 | wxImage::wxImage( int width, int height, unsigned char* data, bool static_data ) | |
134 | { | |
135 | Create( width, height, data, static_data ); | |
136 | } | |
137 | ||
138 | wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data ) | |
139 | { | |
140 | Create( width, height, data, alpha, static_data ); | |
141 | } | |
142 | ||
143 | wxImage::wxImage( const wxString& name, long type, int index ) | |
144 | { | |
145 | LoadFile( name, type, index ); | |
146 | } | |
147 | ||
148 | wxImage::wxImage( const wxString& name, const wxString& mimetype, int index ) | |
149 | { | |
150 | LoadFile( name, mimetype, index ); | |
151 | } | |
152 | ||
153 | #if wxUSE_STREAMS | |
154 | wxImage::wxImage( wxInputStream& stream, long type, int index ) | |
155 | { | |
156 | LoadFile( stream, type, index ); | |
157 | } | |
158 | ||
159 | wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index ) | |
160 | { | |
161 | LoadFile( stream, mimetype, index ); | |
162 | } | |
163 | #endif // wxUSE_STREAMS | |
164 | ||
165 | wxImage::wxImage(const char* const* xpmData) | |
166 | { | |
167 | Create(xpmData); | |
168 | } | |
169 | ||
170 | bool wxImage::Create(const char* const* xpmData) | |
171 | { | |
172 | #if wxUSE_XPM | |
173 | UnRef(); | |
174 | ||
175 | wxXPMDecoder decoder; | |
176 | (*this) = decoder.ReadData(xpmData); | |
177 | return Ok(); | |
178 | #else | |
179 | return false; | |
180 | #endif | |
181 | } | |
182 | ||
183 | bool wxImage::Create( int width, int height, bool clear ) | |
184 | { | |
185 | UnRef(); | |
186 | ||
187 | m_refData = new wxImageRefData(); | |
188 | ||
189 | M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 ); | |
190 | if (!M_IMGDATA->m_data) | |
191 | { | |
192 | UnRef(); | |
193 | return false; | |
194 | } | |
195 | ||
196 | if (clear) | |
197 | memset(M_IMGDATA->m_data, 0, width*height*3); | |
198 | ||
199 | M_IMGDATA->m_width = width; | |
200 | M_IMGDATA->m_height = height; | |
201 | M_IMGDATA->m_ok = true; | |
202 | ||
203 | return true; | |
204 | } | |
205 | ||
206 | bool wxImage::Create( int width, int height, unsigned char* data, bool static_data ) | |
207 | { | |
208 | UnRef(); | |
209 | ||
210 | wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") ); | |
211 | ||
212 | m_refData = new wxImageRefData(); | |
213 | ||
214 | M_IMGDATA->m_data = data; | |
215 | M_IMGDATA->m_width = width; | |
216 | M_IMGDATA->m_height = height; | |
217 | M_IMGDATA->m_ok = true; | |
218 | M_IMGDATA->m_static = static_data; | |
219 | ||
220 | return true; | |
221 | } | |
222 | ||
223 | bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data ) | |
224 | { | |
225 | UnRef(); | |
226 | ||
227 | wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") ); | |
228 | ||
229 | m_refData = new wxImageRefData(); | |
230 | ||
231 | M_IMGDATA->m_data = data; | |
232 | M_IMGDATA->m_alpha = alpha; | |
233 | M_IMGDATA->m_width = width; | |
234 | M_IMGDATA->m_height = height; | |
235 | M_IMGDATA->m_ok = true; | |
236 | M_IMGDATA->m_static = static_data; | |
237 | ||
238 | return true; | |
239 | } | |
240 | ||
241 | void wxImage::Destroy() | |
242 | { | |
243 | UnRef(); | |
244 | } | |
245 | ||
246 | wxObjectRefData* wxImage::CreateRefData() const | |
247 | { | |
248 | return new wxImageRefData; | |
249 | } | |
250 | ||
251 | wxObjectRefData* wxImage::CloneRefData(const wxObjectRefData* that) const | |
252 | { | |
253 | const wxImageRefData* refData = wx_static_cast(const wxImageRefData*, that); | |
254 | wxCHECK_MSG(refData->m_ok, NULL, wxT("invalid image") ); | |
255 | ||
256 | wxImageRefData* refData_new = new wxImageRefData; | |
257 | refData_new->m_width = refData->m_width; | |
258 | refData_new->m_height = refData->m_height; | |
259 | refData_new->m_maskRed = refData->m_maskRed; | |
260 | refData_new->m_maskGreen = refData->m_maskGreen; | |
261 | refData_new->m_maskBlue = refData->m_maskBlue; | |
262 | refData_new->m_hasMask = refData->m_hasMask; | |
263 | refData_new->m_ok = true; | |
264 | unsigned size = unsigned(refData->m_width) * unsigned(refData->m_height); | |
265 | if (refData->m_alpha != NULL) | |
266 | { | |
267 | refData_new->m_alpha = (unsigned char*)malloc(size); | |
268 | memcpy(refData_new->m_alpha, refData->m_alpha, size); | |
269 | } | |
270 | size *= 3; | |
271 | refData_new->m_data = (unsigned char*)malloc(size); | |
272 | memcpy(refData_new->m_data, refData->m_data, size); | |
273 | #if wxUSE_PALETTE | |
274 | refData_new->m_palette = refData->m_palette; | |
275 | #endif | |
276 | refData_new->m_optionNames = refData->m_optionNames; | |
277 | refData_new->m_optionValues = refData->m_optionValues; | |
278 | return refData_new; | |
279 | } | |
280 | ||
281 | wxImage wxImage::Copy() const | |
282 | { | |
283 | wxImage image; | |
284 | ||
285 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
286 | ||
287 | image.m_refData = CloneRefData(m_refData); | |
288 | ||
289 | return image; | |
290 | } | |
291 | ||
292 | wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const | |
293 | { | |
294 | if( xFactor == 1 && yFactor == 1 ) | |
295 | return *this; | |
296 | ||
297 | wxImage image; | |
298 | ||
299 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
300 | ||
301 | // can't scale to/from 0 size | |
302 | wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image, | |
303 | wxT("invalid new image size") ); | |
304 | ||
305 | long old_height = M_IMGDATA->m_height, | |
306 | old_width = M_IMGDATA->m_width; | |
307 | ||
308 | wxCHECK_MSG( (old_height > 0) && (old_width > 0), image, | |
309 | wxT("invalid old image size") ); | |
310 | ||
311 | long width = old_width / xFactor ; | |
312 | long height = old_height / yFactor ; | |
313 | ||
314 | image.Create( width, height, false ); | |
315 | ||
316 | char unsigned *data = image.GetData(); | |
317 | ||
318 | wxCHECK_MSG( data, image, wxT("unable to create image") ); | |
319 | ||
320 | bool hasMask = false ; | |
321 | unsigned char maskRed = 0; | |
322 | unsigned char maskGreen = 0; | |
323 | unsigned char maskBlue =0 ; | |
324 | ||
325 | unsigned char *source_data = M_IMGDATA->m_data; | |
326 | unsigned char *target_data = data; | |
327 | unsigned char *source_alpha = 0 ; | |
328 | unsigned char *target_alpha = 0 ; | |
329 | if (M_IMGDATA->m_hasMask) | |
330 | { | |
331 | hasMask = true ; | |
332 | maskRed = M_IMGDATA->m_maskRed; | |
333 | maskGreen = M_IMGDATA->m_maskGreen; | |
334 | maskBlue =M_IMGDATA->m_maskBlue ; | |
335 | ||
336 | image.SetMaskColour( M_IMGDATA->m_maskRed, | |
337 | M_IMGDATA->m_maskGreen, | |
338 | M_IMGDATA->m_maskBlue ); | |
339 | } | |
340 | else | |
341 | { | |
342 | source_alpha = M_IMGDATA->m_alpha ; | |
343 | if ( source_alpha ) | |
344 | { | |
345 | image.SetAlpha() ; | |
346 | target_alpha = image.GetAlpha() ; | |
347 | } | |
348 | } | |
349 | ||
350 | for (long y = 0; y < height; y++) | |
351 | { | |
352 | for (long x = 0; x < width; x++) | |
353 | { | |
354 | unsigned long avgRed = 0 ; | |
355 | unsigned long avgGreen = 0; | |
356 | unsigned long avgBlue = 0; | |
357 | unsigned long avgAlpha = 0 ; | |
358 | unsigned long counter = 0 ; | |
359 | // determine average | |
360 | for ( int y1 = 0 ; y1 < yFactor ; ++y1 ) | |
361 | { | |
362 | long y_offset = (y * yFactor + y1) * old_width; | |
363 | for ( int x1 = 0 ; x1 < xFactor ; ++x1 ) | |
364 | { | |
365 | unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ; | |
366 | unsigned char red = pixel[0] ; | |
367 | unsigned char green = pixel[1] ; | |
368 | unsigned char blue = pixel[2] ; | |
369 | unsigned char alpha = 255 ; | |
370 | if ( source_alpha ) | |
371 | alpha = *(source_alpha + y_offset + x * xFactor + x1) ; | |
372 | if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue ) | |
373 | { | |
374 | if ( alpha > 0 ) | |
375 | { | |
376 | avgRed += red ; | |
377 | avgGreen += green ; | |
378 | avgBlue += blue ; | |
379 | } | |
380 | avgAlpha += alpha ; | |
381 | counter++ ; | |
382 | } | |
383 | } | |
384 | } | |
385 | if ( counter == 0 ) | |
386 | { | |
387 | *(target_data++) = M_IMGDATA->m_maskRed ; | |
388 | *(target_data++) = M_IMGDATA->m_maskGreen ; | |
389 | *(target_data++) = M_IMGDATA->m_maskBlue ; | |
390 | } | |
391 | else | |
392 | { | |
393 | if ( source_alpha ) | |
394 | *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ; | |
395 | *(target_data++) = (unsigned char)(avgRed / counter); | |
396 | *(target_data++) = (unsigned char)(avgGreen / counter); | |
397 | *(target_data++) = (unsigned char)(avgBlue / counter); | |
398 | } | |
399 | } | |
400 | } | |
401 | ||
402 | // In case this is a cursor, make sure the hotspot is scaled accordingly: | |
403 | if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) | |
404 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, | |
405 | (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X))/xFactor); | |
406 | if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) | |
407 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, | |
408 | (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y))/yFactor); | |
409 | ||
410 | return image; | |
411 | } | |
412 | ||
413 | wxImage wxImage::Scale( int width, int height, int quality ) const | |
414 | { | |
415 | wxImage image; | |
416 | ||
417 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
418 | ||
419 | // can't scale to/from 0 size | |
420 | wxCHECK_MSG( (width > 0) && (height > 0), image, | |
421 | wxT("invalid new image size") ); | |
422 | ||
423 | long old_height = M_IMGDATA->m_height, | |
424 | old_width = M_IMGDATA->m_width; | |
425 | wxCHECK_MSG( (old_height > 0) && (old_width > 0), image, | |
426 | wxT("invalid old image size") ); | |
427 | ||
428 | // If the image's new width and height are the same as the original, no | |
429 | // need to waste time or CPU cycles | |
430 | if ( old_width == width && old_height == height ) | |
431 | return *this; | |
432 | ||
433 | // Scale the image (...or more appropriately, resample the image) using | |
434 | // either the high-quality or normal method as specified | |
435 | if ( quality == wxIMAGE_QUALITY_HIGH ) | |
436 | { | |
437 | // We need to check whether we are downsampling or upsampling the image | |
438 | if ( width < old_width && height < old_height ) | |
439 | { | |
440 | // Downsample the image using the box averaging method for best results | |
441 | image = ResampleBox(width, height); | |
442 | } | |
443 | else | |
444 | { | |
445 | // For upsampling or other random/wierd image dimensions we'll use | |
446 | // a bicubic b-spline scaling method | |
447 | image = ResampleBicubic(width, height); | |
448 | } | |
449 | } | |
450 | else // Default scaling method == simple pixel replication | |
451 | { | |
452 | if ( old_width % width == 0 && old_width >= width && | |
453 | old_height % height == 0 && old_height >= height ) | |
454 | { | |
455 | return ShrinkBy( old_width / width , old_height / height ) ; | |
456 | } | |
457 | image.Create( width, height, false ); | |
458 | ||
459 | unsigned char *data = image.GetData(); | |
460 | ||
461 | wxCHECK_MSG( data, image, wxT("unable to create image") ); | |
462 | ||
463 | unsigned char *source_data = M_IMGDATA->m_data; | |
464 | unsigned char *target_data = data; | |
465 | unsigned char *source_alpha = 0 ; | |
466 | unsigned char *target_alpha = 0 ; | |
467 | ||
468 | if ( !M_IMGDATA->m_hasMask ) | |
469 | { | |
470 | source_alpha = M_IMGDATA->m_alpha ; | |
471 | if ( source_alpha ) | |
472 | { | |
473 | image.SetAlpha() ; | |
474 | target_alpha = image.GetAlpha() ; | |
475 | } | |
476 | } | |
477 | ||
478 | long x_delta = (old_width<<16) / width; | |
479 | long y_delta = (old_height<<16) / height; | |
480 | ||
481 | unsigned char* dest_pixel = target_data; | |
482 | ||
483 | long y = 0; | |
484 | for ( long j = 0; j < height; j++ ) | |
485 | { | |
486 | unsigned char* src_line = &source_data[(y>>16)*old_width*3]; | |
487 | unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ; | |
488 | ||
489 | long x = 0; | |
490 | for ( long i = 0; i < width; i++ ) | |
491 | { | |
492 | unsigned char* src_pixel = &src_line[(x>>16)*3]; | |
493 | unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ; | |
494 | dest_pixel[0] = src_pixel[0]; | |
495 | dest_pixel[1] = src_pixel[1]; | |
496 | dest_pixel[2] = src_pixel[2]; | |
497 | dest_pixel += 3; | |
498 | if ( source_alpha ) | |
499 | *(target_alpha++) = *src_alpha_pixel ; | |
500 | x += x_delta; | |
501 | } | |
502 | ||
503 | y += y_delta; | |
504 | } | |
505 | } | |
506 | ||
507 | // If the original image has a mask, apply the mask to the new image | |
508 | if (M_IMGDATA->m_hasMask) | |
509 | { | |
510 | image.SetMaskColour( M_IMGDATA->m_maskRed, | |
511 | M_IMGDATA->m_maskGreen, | |
512 | M_IMGDATA->m_maskBlue ); | |
513 | } | |
514 | ||
515 | // In case this is a cursor, make sure the hotspot is scaled accordingly: | |
516 | if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) | |
517 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, | |
518 | (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)*width)/old_width); | |
519 | if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) | |
520 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, | |
521 | (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y)*height)/old_height); | |
522 | ||
523 | return image; | |
524 | } | |
525 | ||
526 | wxImage wxImage::ResampleBox(int width, int height) const | |
527 | { | |
528 | // This function implements a simple pre-blur/box averaging method for | |
529 | // downsampling that gives reasonably smooth results To scale the image | |
530 | // down we will need to gather a grid of pixels of the size of the scale | |
531 | // factor in each direction and then do an averaging of the pixels. | |
532 | ||
533 | wxImage ret_image(width, height, false); | |
534 | ||
535 | const double scale_factor_x = double(M_IMGDATA->m_width) / width; | |
536 | const double scale_factor_y = double(M_IMGDATA->m_height) / height; | |
537 | ||
538 | const int scale_factor_x_2 = (int)(scale_factor_x / 2); | |
539 | const int scale_factor_y_2 = (int)(scale_factor_y / 2); | |
540 | ||
541 | // If we want good-looking results we need to pre-blur the image a bit first | |
542 | wxImage src_image(*this); | |
543 | src_image = src_image.BlurHorizontal(scale_factor_x_2); | |
544 | src_image = src_image.BlurVertical(scale_factor_y_2); | |
545 | ||
546 | unsigned char* src_data = src_image.GetData(); | |
547 | unsigned char* src_alpha = src_image.GetAlpha(); | |
548 | unsigned char* dst_data = ret_image.GetData(); | |
549 | unsigned char* dst_alpha = NULL; | |
550 | ||
551 | if ( src_alpha ) | |
552 | { | |
553 | ret_image.SetAlpha(); | |
554 | dst_alpha = ret_image.GetAlpha(); | |
555 | } | |
556 | ||
557 | int averaged_pixels, src_pixel_index; | |
558 | double sum_r, sum_g, sum_b, sum_a; | |
559 | ||
560 | for ( int y = 0; y < height; y++ ) // Destination image - Y direction | |
561 | { | |
562 | // Source pixel in the Y direction | |
563 | int src_y = (int)(y * scale_factor_y); | |
564 | ||
565 | for ( int x = 0; x < width; x++ ) // Destination image - X direction | |
566 | { | |
567 | // Source pixel in the X direction | |
568 | int src_x = (int)(x * scale_factor_x); | |
569 | ||
570 | // Box of pixels to average | |
571 | averaged_pixels = 0; | |
572 | sum_r = sum_g = sum_b = sum_a = 0.0; | |
573 | ||
574 | for ( int j = int(src_y - scale_factor_y/2.0 + 1); | |
575 | j <= int(src_y + scale_factor_y_2); | |
576 | j++ ) | |
577 | { | |
578 | // We don't care to average pixels that don't exist (edges) | |
579 | if ( j < 0 || j > M_IMGDATA->m_height ) | |
580 | continue; | |
581 | ||
582 | for ( int i = int(src_x - scale_factor_x/2.0 + 1); | |
583 | i <= src_x + scale_factor_x_2; | |
584 | i++ ) | |
585 | { | |
586 | // Don't average edge pixels | |
587 | if ( i < 0 || i > M_IMGDATA->m_width ) | |
588 | continue; | |
589 | ||
590 | // Calculate the actual index in our source pixels | |
591 | src_pixel_index = src_y * M_IMGDATA->m_width + src_x; | |
592 | ||
593 | sum_r += src_data[src_pixel_index * 3 + 0]; | |
594 | sum_g += src_data[src_pixel_index * 3 + 1]; | |
595 | sum_b += src_data[src_pixel_index * 3 + 2]; | |
596 | if ( src_alpha ) | |
597 | sum_a += src_alpha[src_pixel_index]; | |
598 | ||
599 | averaged_pixels++; | |
600 | } | |
601 | } | |
602 | ||
603 | // Calculate the average from the sum and number of averaged pixels | |
604 | dst_data[0] = (unsigned char)(sum_r / averaged_pixels); | |
605 | dst_data[1] = (unsigned char)(sum_g / averaged_pixels); | |
606 | dst_data[2] = (unsigned char)(sum_b / averaged_pixels); | |
607 | dst_data += 3; | |
608 | if ( src_alpha ) | |
609 | *dst_alpha++ = (unsigned char)(sum_a / averaged_pixels); | |
610 | } | |
611 | } | |
612 | ||
613 | return ret_image; | |
614 | } | |
615 | ||
616 | // The following two local functions are for the B-spline weighting of the | |
617 | // bicubic sampling algorithm | |
618 | static inline double spline_cube(double value) | |
619 | { | |
620 | return value <= 0.0 ? 0.0 : value * value * value; | |
621 | } | |
622 | ||
623 | static inline double spline_weight(double value) | |
624 | { | |
625 | return (spline_cube(value + 2) - | |
626 | 4 * spline_cube(value + 1) + | |
627 | 6 * spline_cube(value) - | |
628 | 4 * spline_cube(value - 1)) / 6; | |
629 | } | |
630 | ||
631 | // This is the bicubic resampling algorithm | |
632 | wxImage wxImage::ResampleBicubic(int width, int height) const | |
633 | { | |
634 | // This function implements a Bicubic B-Spline algorithm for resampling. | |
635 | // This method is certainly a little slower than wxImage's default pixel | |
636 | // replication method, however for most reasonably sized images not being | |
637 | // upsampled too much on a fairly average CPU this difference is hardly | |
638 | // noticeable and the results are far more pleasing to look at. | |
639 | // | |
640 | // This particular bicubic algorithm does pixel weighting according to a | |
641 | // B-Spline that basically implements a Gaussian bell-like weighting | |
642 | // kernel. Because of this method the results may appear a bit blurry when | |
643 | // upsampling by large factors. This is basically because a slight | |
644 | // gaussian blur is being performed to get the smooth look of the upsampled | |
645 | // image. | |
646 | ||
647 | // Edge pixels: 3-4 possible solutions | |
648 | // - (Wrap/tile) Wrap the image, take the color value from the opposite | |
649 | // side of the image. | |
650 | // - (Mirror) Duplicate edge pixels, so that pixel at coordinate (2, n), | |
651 | // where n is nonpositive, will have the value of (2, 1). | |
652 | // - (Ignore) Simply ignore the edge pixels and apply the kernel only to | |
653 | // pixels which do have all neighbours. | |
654 | // - (Clamp) Choose the nearest pixel along the border. This takes the | |
655 | // border pixels and extends them out to infinity. | |
656 | // | |
657 | // NOTE: below the y_offset and x_offset variables are being set for edge | |
658 | // pixels using the "Mirror" method mentioned above | |
659 | ||
660 | wxImage ret_image; | |
661 | ||
662 | ret_image.Create(width, height, false); | |
663 | ||
664 | unsigned char* src_data = M_IMGDATA->m_data; | |
665 | unsigned char* src_alpha = M_IMGDATA->m_alpha; | |
666 | unsigned char* dst_data = ret_image.GetData(); | |
667 | unsigned char* dst_alpha = NULL; | |
668 | ||
669 | if ( src_alpha ) | |
670 | { | |
671 | ret_image.SetAlpha(); | |
672 | dst_alpha = ret_image.GetAlpha(); | |
673 | } | |
674 | ||
675 | for ( int dsty = 0; dsty < height; dsty++ ) | |
676 | { | |
677 | // We need to calculate the source pixel to interpolate from - Y-axis | |
678 | double srcpixy = double(dsty * M_IMGDATA->m_height) / height; | |
679 | double dy = srcpixy - (int)srcpixy; | |
680 | ||
681 | for ( int dstx = 0; dstx < width; dstx++ ) | |
682 | { | |
683 | // X-axis of pixel to interpolate from | |
684 | double srcpixx = double(dstx * M_IMGDATA->m_width) / width; | |
685 | double dx = srcpixx - (int)srcpixx; | |
686 | ||
687 | // Sums for each color channel | |
688 | double sum_r = 0, sum_g = 0, sum_b = 0, sum_a = 0; | |
689 | ||
690 | // Here we actually determine the RGBA values for the destination pixel | |
691 | for ( int k = -1; k <= 2; k++ ) | |
692 | { | |
693 | // Y offset | |
694 | int y_offset = srcpixy + k < 0.0 | |
695 | ? 0 | |
696 | : srcpixy + k >= M_IMGDATA->m_height | |
697 | ? M_IMGDATA->m_height - 1 | |
698 | : (int)(srcpixy + k); | |
699 | ||
700 | // Loop across the X axis | |
701 | for ( int i = -1; i <= 2; i++ ) | |
702 | { | |
703 | // X offset | |
704 | int x_offset = srcpixx + i < 0.0 | |
705 | ? 0 | |
706 | : srcpixx + i >= M_IMGDATA->m_width | |
707 | ? M_IMGDATA->m_width - 1 | |
708 | : (int)(srcpixx + i); | |
709 | ||
710 | // Calculate the exact position where the source data | |
711 | // should be pulled from based on the x_offset and y_offset | |
712 | int src_pixel_index = y_offset*M_IMGDATA->m_width + x_offset; | |
713 | ||
714 | // Calculate the weight for the specified pixel according | |
715 | // to the bicubic b-spline kernel we're using for | |
716 | // interpolation | |
717 | double | |
718 | pixel_weight = spline_weight(i - dx)*spline_weight(k - dy); | |
719 | ||
720 | // Create a sum of all velues for each color channel | |
721 | // adjusted for the pixel's calculated weight | |
722 | sum_r += src_data[src_pixel_index * 3 + 0] * pixel_weight; | |
723 | sum_g += src_data[src_pixel_index * 3 + 1] * pixel_weight; | |
724 | sum_b += src_data[src_pixel_index * 3 + 2] * pixel_weight; | |
725 | if ( src_alpha ) | |
726 | sum_a += src_alpha[src_pixel_index] * pixel_weight; | |
727 | } | |
728 | } | |
729 | ||
730 | // Put the data into the destination image. The summed values are | |
731 | // of double data type and are rounded here for accuracy | |
732 | dst_data[0] = (unsigned char)(sum_r + 0.5); | |
733 | dst_data[1] = (unsigned char)(sum_g + 0.5); | |
734 | dst_data[2] = (unsigned char)(sum_b + 0.5); | |
735 | dst_data += 3; | |
736 | ||
737 | if ( src_alpha ) | |
738 | *dst_alpha++ = (unsigned char)sum_a; | |
739 | } | |
740 | } | |
741 | ||
742 | return ret_image; | |
743 | } | |
744 | ||
745 | // Blur in the horizontal direction | |
746 | wxImage wxImage::BlurHorizontal(int blurRadius) | |
747 | { | |
748 | wxImage ret_image; | |
749 | ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); | |
750 | ||
751 | unsigned char* src_data = M_IMGDATA->m_data; | |
752 | unsigned char* dst_data = ret_image.GetData(); | |
753 | unsigned char* src_alpha = M_IMGDATA->m_alpha; | |
754 | unsigned char* dst_alpha = NULL; | |
755 | ||
756 | // Check for a mask or alpha | |
757 | if ( src_alpha ) | |
758 | { | |
759 | ret_image.SetAlpha(); | |
760 | dst_alpha = ret_image.GetAlpha(); | |
761 | } | |
762 | else if ( M_IMGDATA->m_hasMask ) | |
763 | { | |
764 | ret_image.SetMaskColour(M_IMGDATA->m_maskRed, | |
765 | M_IMGDATA->m_maskGreen, | |
766 | M_IMGDATA->m_maskBlue); | |
767 | } | |
768 | ||
769 | // number of pixels we average over | |
770 | const int blurArea = blurRadius*2 + 1; | |
771 | ||
772 | // Horizontal blurring algorithm - average all pixels in the specified blur | |
773 | // radius in the X or horizontal direction | |
774 | for ( int y = 0; y < M_IMGDATA->m_height; y++ ) | |
775 | { | |
776 | // Variables used in the blurring algorithm | |
777 | long sum_r = 0, | |
778 | sum_g = 0, | |
779 | sum_b = 0, | |
780 | sum_a = 0; | |
781 | ||
782 | long pixel_idx; | |
783 | const unsigned char *src; | |
784 | unsigned char *dst; | |
785 | ||
786 | // Calculate the average of all pixels in the blur radius for the first | |
787 | // pixel of the row | |
788 | for ( int kernel_x = -blurRadius; kernel_x <= blurRadius; kernel_x++ ) | |
789 | { | |
790 | // To deal with the pixels at the start of a row so it's not | |
791 | // grabbing GOK values from memory at negative indices of the | |
792 | // image's data or grabbing from the previous row | |
793 | if ( kernel_x < 0 ) | |
794 | pixel_idx = y * M_IMGDATA->m_width; | |
795 | else | |
796 | pixel_idx = kernel_x + y * M_IMGDATA->m_width; | |
797 | ||
798 | src = src_data + pixel_idx*3; | |
799 | sum_r += src[0]; | |
800 | sum_g += src[1]; | |
801 | sum_b += src[2]; | |
802 | if ( src_alpha ) | |
803 | sum_a += src_alpha[pixel_idx]; | |
804 | } | |
805 | ||
806 | dst = dst_data + y * M_IMGDATA->m_width*3; | |
807 | dst[0] = (unsigned char)(sum_r / blurArea); | |
808 | dst[1] = (unsigned char)(sum_g / blurArea); | |
809 | dst[2] = (unsigned char)(sum_b / blurArea); | |
810 | if ( src_alpha ) | |
811 | dst_alpha[y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); | |
812 | ||
813 | // Now average the values of the rest of the pixels by just moving the | |
814 | // blur radius box along the row | |
815 | for ( int x = 1; x < M_IMGDATA->m_width; x++ ) | |
816 | { | |
817 | // Take care of edge pixels on the left edge by essentially | |
818 | // duplicating the edge pixel | |
819 | if ( x - blurRadius - 1 < 0 ) | |
820 | pixel_idx = y * M_IMGDATA->m_width; | |
821 | else | |
822 | pixel_idx = (x - blurRadius - 1) + y * M_IMGDATA->m_width; | |
823 | ||
824 | // Subtract the value of the pixel at the left side of the blur | |
825 | // radius box | |
826 | src = src_data + pixel_idx*3; | |
827 | sum_r -= src[0]; | |
828 | sum_g -= src[1]; | |
829 | sum_b -= src[2]; | |
830 | if ( src_alpha ) | |
831 | sum_a -= src_alpha[pixel_idx]; | |
832 | ||
833 | // Take care of edge pixels on the right edge | |
834 | if ( x + blurRadius > M_IMGDATA->m_width - 1 ) | |
835 | pixel_idx = M_IMGDATA->m_width - 1 + y * M_IMGDATA->m_width; | |
836 | else | |
837 | pixel_idx = x + blurRadius + y * M_IMGDATA->m_width; | |
838 | ||
839 | // Add the value of the pixel being added to the end of our box | |
840 | src = src_data + pixel_idx*3; | |
841 | sum_r += src[0]; | |
842 | sum_g += src[1]; | |
843 | sum_b += src[2]; | |
844 | if ( src_alpha ) | |
845 | sum_a += src_alpha[pixel_idx]; | |
846 | ||
847 | // Save off the averaged data | |
848 | dst = dst_data + x*3 + y*M_IMGDATA->m_width*3; | |
849 | dst[0] = (unsigned char)(sum_r / blurArea); | |
850 | dst[1] = (unsigned char)(sum_g / blurArea); | |
851 | dst[2] = (unsigned char)(sum_b / blurArea); | |
852 | if ( src_alpha ) | |
853 | dst_alpha[x + y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); | |
854 | } | |
855 | } | |
856 | ||
857 | return ret_image; | |
858 | } | |
859 | ||
860 | // Blur in the vertical direction | |
861 | wxImage wxImage::BlurVertical(int blurRadius) | |
862 | { | |
863 | wxImage ret_image; | |
864 | ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); | |
865 | ||
866 | unsigned char* src_data = M_IMGDATA->m_data; | |
867 | unsigned char* dst_data = ret_image.GetData(); | |
868 | unsigned char* src_alpha = M_IMGDATA->m_alpha; | |
869 | unsigned char* dst_alpha = NULL; | |
870 | ||
871 | // Check for a mask or alpha | |
872 | if ( src_alpha ) | |
873 | { | |
874 | ret_image.SetAlpha(); | |
875 | dst_alpha = ret_image.GetAlpha(); | |
876 | } | |
877 | else if ( M_IMGDATA->m_hasMask ) | |
878 | { | |
879 | ret_image.SetMaskColour(M_IMGDATA->m_maskRed, | |
880 | M_IMGDATA->m_maskGreen, | |
881 | M_IMGDATA->m_maskBlue); | |
882 | } | |
883 | ||
884 | // number of pixels we average over | |
885 | const int blurArea = blurRadius*2 + 1; | |
886 | ||
887 | // Vertical blurring algorithm - same as horizontal but switched the | |
888 | // opposite direction | |
889 | for ( int x = 0; x < M_IMGDATA->m_width; x++ ) | |
890 | { | |
891 | // Variables used in the blurring algorithm | |
892 | long sum_r = 0, | |
893 | sum_g = 0, | |
894 | sum_b = 0, | |
895 | sum_a = 0; | |
896 | ||
897 | long pixel_idx; | |
898 | const unsigned char *src; | |
899 | unsigned char *dst; | |
900 | ||
901 | // Calculate the average of all pixels in our blur radius box for the | |
902 | // first pixel of the column | |
903 | for ( int kernel_y = -blurRadius; kernel_y <= blurRadius; kernel_y++ ) | |
904 | { | |
905 | // To deal with the pixels at the start of a column so it's not | |
906 | // grabbing GOK values from memory at negative indices of the | |
907 | // image's data or grabbing from the previous column | |
908 | if ( kernel_y < 0 ) | |
909 | pixel_idx = x; | |
910 | else | |
911 | pixel_idx = x + kernel_y * M_IMGDATA->m_width; | |
912 | ||
913 | src = src_data + pixel_idx*3; | |
914 | sum_r += src[0]; | |
915 | sum_g += src[1]; | |
916 | sum_b += src[2]; | |
917 | if ( src_alpha ) | |
918 | sum_a += src_alpha[pixel_idx]; | |
919 | } | |
920 | ||
921 | dst = dst_data + x*3; | |
922 | dst[0] = (unsigned char)(sum_r / blurArea); | |
923 | dst[1] = (unsigned char)(sum_g / blurArea); | |
924 | dst[2] = (unsigned char)(sum_b / blurArea); | |
925 | if ( src_alpha ) | |
926 | dst_alpha[x] = (unsigned char)(sum_a / blurArea); | |
927 | ||
928 | // Now average the values of the rest of the pixels by just moving the | |
929 | // box along the column from top to bottom | |
930 | for ( int y = 1; y < M_IMGDATA->m_height; y++ ) | |
931 | { | |
932 | // Take care of pixels that would be beyond the top edge by | |
933 | // duplicating the top edge pixel for the column | |
934 | if ( y - blurRadius - 1 < 0 ) | |
935 | pixel_idx = x; | |
936 | else | |
937 | pixel_idx = x + (y - blurRadius - 1) * M_IMGDATA->m_width; | |
938 | ||
939 | // Subtract the value of the pixel at the top of our blur radius box | |
940 | src = src_data + pixel_idx*3; | |
941 | sum_r -= src[0]; | |
942 | sum_g -= src[1]; | |
943 | sum_b -= src[2]; | |
944 | if ( src_alpha ) | |
945 | sum_a -= src_alpha[pixel_idx]; | |
946 | ||
947 | // Take care of the pixels that would be beyond the bottom edge of | |
948 | // the image similar to the top edge | |
949 | if ( y + blurRadius > M_IMGDATA->m_height - 1 ) | |
950 | pixel_idx = x + (M_IMGDATA->m_height - 1) * M_IMGDATA->m_width; | |
951 | else | |
952 | pixel_idx = x + (blurRadius + y) * M_IMGDATA->m_width; | |
953 | ||
954 | // Add the value of the pixel being added to the end of our box | |
955 | src = src_data + pixel_idx*3; | |
956 | sum_r += src[0]; | |
957 | sum_g += src[1]; | |
958 | sum_b += src[2]; | |
959 | if ( src_alpha ) | |
960 | sum_a += src_alpha[pixel_idx]; | |
961 | ||
962 | // Save off the averaged data | |
963 | dst = dst_data + (x + y * M_IMGDATA->m_width) * 3; | |
964 | dst[0] = (unsigned char)(sum_r / blurArea); | |
965 | dst[1] = (unsigned char)(sum_g / blurArea); | |
966 | dst[2] = (unsigned char)(sum_b / blurArea); | |
967 | if ( src_alpha ) | |
968 | dst_alpha[x + y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); | |
969 | } | |
970 | } | |
971 | ||
972 | return ret_image; | |
973 | } | |
974 | ||
975 | // The new blur function | |
976 | wxImage wxImage::Blur(int blurRadius) | |
977 | { | |
978 | wxImage ret_image; | |
979 | ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); | |
980 | ||
981 | // Blur the image in each direction | |
982 | ret_image = BlurHorizontal(blurRadius); | |
983 | ret_image = ret_image.BlurVertical(blurRadius); | |
984 | ||
985 | return ret_image; | |
986 | } | |
987 | ||
988 | wxImage wxImage::Rotate90( bool clockwise ) const | |
989 | { | |
990 | wxImage image; | |
991 | ||
992 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
993 | ||
994 | image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false ); | |
995 | ||
996 | unsigned char *data = image.GetData(); | |
997 | ||
998 | wxCHECK_MSG( data, image, wxT("unable to create image") ); | |
999 | ||
1000 | unsigned char *source_data = M_IMGDATA->m_data; | |
1001 | unsigned char *target_data; | |
1002 | unsigned char *alpha_data = 0 ; | |
1003 | unsigned char *source_alpha = 0 ; | |
1004 | unsigned char *target_alpha = 0 ; | |
1005 | ||
1006 | if (M_IMGDATA->m_hasMask) | |
1007 | { | |
1008 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); | |
1009 | } | |
1010 | else | |
1011 | { | |
1012 | source_alpha = M_IMGDATA->m_alpha ; | |
1013 | if ( source_alpha ) | |
1014 | { | |
1015 | image.SetAlpha() ; | |
1016 | alpha_data = image.GetAlpha() ; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | long height = M_IMGDATA->m_height; | |
1021 | long width = M_IMGDATA->m_width; | |
1022 | ||
1023 | for (long j = 0; j < height; j++) | |
1024 | { | |
1025 | for (long i = 0; i < width; i++) | |
1026 | { | |
1027 | if (clockwise) | |
1028 | { | |
1029 | target_data = data + (((i+1)*height) - j - 1)*3; | |
1030 | if(source_alpha) | |
1031 | target_alpha = alpha_data + (((i+1)*height) - j - 1); | |
1032 | } | |
1033 | else | |
1034 | { | |
1035 | target_data = data + ((height*(width-1)) + j - (i*height))*3; | |
1036 | if(source_alpha) | |
1037 | target_alpha = alpha_data + ((height*(width-1)) + j - (i*height)); | |
1038 | } | |
1039 | memcpy( target_data, source_data, 3 ); | |
1040 | source_data += 3; | |
1041 | ||
1042 | if(source_alpha) | |
1043 | { | |
1044 | memcpy( target_alpha, source_alpha, 1 ); | |
1045 | source_alpha += 1; | |
1046 | } | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | return image; | |
1051 | } | |
1052 | ||
1053 | wxImage wxImage::Mirror( bool horizontally ) const | |
1054 | { | |
1055 | wxImage image; | |
1056 | ||
1057 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
1058 | ||
1059 | image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); | |
1060 | ||
1061 | unsigned char *data = image.GetData(); | |
1062 | unsigned char *alpha = NULL; | |
1063 | ||
1064 | wxCHECK_MSG( data, image, wxT("unable to create image") ); | |
1065 | ||
1066 | if (M_IMGDATA->m_alpha != NULL) { | |
1067 | image.SetAlpha(); | |
1068 | alpha = image.GetAlpha(); | |
1069 | wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") ); | |
1070 | } | |
1071 | ||
1072 | if (M_IMGDATA->m_hasMask) | |
1073 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); | |
1074 | ||
1075 | long height = M_IMGDATA->m_height; | |
1076 | long width = M_IMGDATA->m_width; | |
1077 | ||
1078 | unsigned char *source_data = M_IMGDATA->m_data; | |
1079 | unsigned char *target_data; | |
1080 | ||
1081 | if (horizontally) | |
1082 | { | |
1083 | for (long j = 0; j < height; j++) | |
1084 | { | |
1085 | data += width*3; | |
1086 | target_data = data-3; | |
1087 | for (long i = 0; i < width; i++) | |
1088 | { | |
1089 | memcpy( target_data, source_data, 3 ); | |
1090 | source_data += 3; | |
1091 | target_data -= 3; | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | if (alpha != NULL) | |
1096 | { | |
1097 | // src_alpha starts at the first pixel and increases by 1 after each step | |
1098 | // (a step here is the copy of the alpha value of one pixel) | |
1099 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; | |
1100 | // dest_alpha starts just beyond the first line, decreases before each step, | |
1101 | // and after each line is finished, increases by 2 widths (skipping the line | |
1102 | // just copied and the line that will be copied next) | |
1103 | unsigned char *dest_alpha = alpha + width; | |
1104 | ||
1105 | for (long jj = 0; jj < height; ++jj) | |
1106 | { | |
1107 | for (long i = 0; i < width; ++i) { | |
1108 | *(--dest_alpha) = *(src_alpha++); // copy one pixel | |
1109 | } | |
1110 | dest_alpha += 2 * width; // advance beyond the end of the next line | |
1111 | } | |
1112 | } | |
1113 | } | |
1114 | else | |
1115 | { | |
1116 | for (long i = 0; i < height; i++) | |
1117 | { | |
1118 | target_data = data + 3*width*(height-1-i); | |
1119 | memcpy( target_data, source_data, (size_t)3*width ); | |
1120 | source_data += 3*width; | |
1121 | } | |
1122 | ||
1123 | if (alpha != NULL) | |
1124 | { | |
1125 | // src_alpha starts at the first pixel and increases by 1 width after each step | |
1126 | // (a step here is the copy of the alpha channel of an entire line) | |
1127 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; | |
1128 | // dest_alpha starts just beyond the last line (beyond the whole image) | |
1129 | // and decreases by 1 width before each step | |
1130 | unsigned char *dest_alpha = alpha + width * height; | |
1131 | ||
1132 | for (long jj = 0; jj < height; ++jj) | |
1133 | { | |
1134 | dest_alpha -= width; | |
1135 | memcpy( dest_alpha, src_alpha, (size_t)width ); | |
1136 | src_alpha += width; | |
1137 | } | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | return image; | |
1142 | } | |
1143 | ||
1144 | wxImage wxImage::GetSubImage( const wxRect &rect ) const | |
1145 | { | |
1146 | wxImage image; | |
1147 | ||
1148 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
1149 | ||
1150 | wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && | |
1151 | (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()), | |
1152 | image, wxT("invalid subimage size") ); | |
1153 | ||
1154 | const int subwidth = rect.GetWidth(); | |
1155 | const int subheight = rect.GetHeight(); | |
1156 | ||
1157 | image.Create( subwidth, subheight, false ); | |
1158 | ||
1159 | const unsigned char *src_data = GetData(); | |
1160 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; | |
1161 | unsigned char *subdata = image.GetData(); | |
1162 | unsigned char *subalpha = NULL; | |
1163 | ||
1164 | wxCHECK_MSG( subdata, image, wxT("unable to create image") ); | |
1165 | ||
1166 | if (src_alpha != NULL) { | |
1167 | image.SetAlpha(); | |
1168 | subalpha = image.GetAlpha(); | |
1169 | wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel")); | |
1170 | } | |
1171 | ||
1172 | if (M_IMGDATA->m_hasMask) | |
1173 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); | |
1174 | ||
1175 | const int width = GetWidth(); | |
1176 | const int pixsoff = rect.GetLeft() + width * rect.GetTop(); | |
1177 | ||
1178 | src_data += 3 * pixsoff; | |
1179 | src_alpha += pixsoff; // won't be used if was NULL, so this is ok | |
1180 | ||
1181 | for (long j = 0; j < subheight; ++j) | |
1182 | { | |
1183 | memcpy( subdata, src_data, 3 * subwidth ); | |
1184 | subdata += 3 * subwidth; | |
1185 | src_data += 3 * width; | |
1186 | if (subalpha != NULL) { | |
1187 | memcpy( subalpha, src_alpha, subwidth ); | |
1188 | subalpha += subwidth; | |
1189 | src_alpha += width; | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | return image; | |
1194 | } | |
1195 | ||
1196 | wxImage wxImage::Size( const wxSize& size, const wxPoint& pos, | |
1197 | int r_, int g_, int b_ ) const | |
1198 | { | |
1199 | wxImage image; | |
1200 | ||
1201 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
1202 | wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") ); | |
1203 | ||
1204 | int width = GetWidth(), height = GetHeight(); | |
1205 | image.Create(size.GetWidth(), size.GetHeight(), false); | |
1206 | ||
1207 | unsigned char r = (unsigned char)r_; | |
1208 | unsigned char g = (unsigned char)g_; | |
1209 | unsigned char b = (unsigned char)b_; | |
1210 | if ((r_ == -1) && (g_ == -1) && (b_ == -1)) | |
1211 | { | |
1212 | GetOrFindMaskColour( &r, &g, &b ); | |
1213 | image.SetMaskColour(r, g, b); | |
1214 | } | |
1215 | ||
1216 | image.SetRGB(wxRect(), r, g, b); | |
1217 | ||
1218 | wxRect subRect(pos.x, pos.y, width, height); | |
1219 | wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight()); | |
1220 | if (pos.x < 0) | |
1221 | finalRect.width -= pos.x; | |
1222 | if (pos.y < 0) | |
1223 | finalRect.height -= pos.y; | |
1224 | ||
1225 | subRect.Intersect(finalRect); | |
1226 | ||
1227 | if (!subRect.IsEmpty()) | |
1228 | { | |
1229 | if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height)) | |
1230 | image.Paste(*this, pos.x, pos.y); | |
1231 | else | |
1232 | image.Paste(GetSubImage(subRect), pos.x, pos.y); | |
1233 | } | |
1234 | ||
1235 | return image; | |
1236 | } | |
1237 | ||
1238 | void wxImage::Paste( const wxImage &image, int x, int y ) | |
1239 | { | |
1240 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1241 | wxCHECK_RET( image.Ok(), wxT("invalid image") ); | |
1242 | ||
1243 | AllocExclusive(); | |
1244 | ||
1245 | int xx = 0; | |
1246 | int yy = 0; | |
1247 | int width = image.GetWidth(); | |
1248 | int height = image.GetHeight(); | |
1249 | ||
1250 | if (x < 0) | |
1251 | { | |
1252 | xx = -x; | |
1253 | width += x; | |
1254 | } | |
1255 | if (y < 0) | |
1256 | { | |
1257 | yy = -y; | |
1258 | height += y; | |
1259 | } | |
1260 | ||
1261 | if ((x+xx)+width > M_IMGDATA->m_width) | |
1262 | width = M_IMGDATA->m_width - (x+xx); | |
1263 | if ((y+yy)+height > M_IMGDATA->m_height) | |
1264 | height = M_IMGDATA->m_height - (y+yy); | |
1265 | ||
1266 | if (width < 1) return; | |
1267 | if (height < 1) return; | |
1268 | ||
1269 | if ((!HasMask() && !image.HasMask()) || | |
1270 | (HasMask() && !image.HasMask()) || | |
1271 | ((HasMask() && image.HasMask() && | |
1272 | (GetMaskRed()==image.GetMaskRed()) && | |
1273 | (GetMaskGreen()==image.GetMaskGreen()) && | |
1274 | (GetMaskBlue()==image.GetMaskBlue())))) | |
1275 | { | |
1276 | width *= 3; | |
1277 | unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); | |
1278 | int source_step = image.GetWidth()*3; | |
1279 | ||
1280 | unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; | |
1281 | int target_step = M_IMGDATA->m_width*3; | |
1282 | for (int j = 0; j < height; j++) | |
1283 | { | |
1284 | memcpy( target_data, source_data, width ); | |
1285 | source_data += source_step; | |
1286 | target_data += target_step; | |
1287 | } | |
1288 | return; | |
1289 | } | |
1290 | ||
1291 | if (!HasMask() && image.HasMask()) | |
1292 | { | |
1293 | unsigned char r = image.GetMaskRed(); | |
1294 | unsigned char g = image.GetMaskGreen(); | |
1295 | unsigned char b = image.GetMaskBlue(); | |
1296 | ||
1297 | width *= 3; | |
1298 | unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); | |
1299 | int source_step = image.GetWidth()*3; | |
1300 | ||
1301 | unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; | |
1302 | int target_step = M_IMGDATA->m_width*3; | |
1303 | ||
1304 | for (int j = 0; j < height; j++) | |
1305 | { | |
1306 | for (int i = 0; i < width; i+=3) | |
1307 | { | |
1308 | if ((source_data[i] != r) || | |
1309 | (source_data[i+1] != g) || | |
1310 | (source_data[i+2] != b)) | |
1311 | { | |
1312 | memcpy( target_data+i, source_data+i, 3 ); | |
1313 | } | |
1314 | } | |
1315 | source_data += source_step; | |
1316 | target_data += target_step; | |
1317 | } | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1, | |
1322 | unsigned char r2, unsigned char g2, unsigned char b2 ) | |
1323 | { | |
1324 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1325 | ||
1326 | AllocExclusive(); | |
1327 | ||
1328 | unsigned char *data = GetData(); | |
1329 | ||
1330 | const int w = GetWidth(); | |
1331 | const int h = GetHeight(); | |
1332 | ||
1333 | for (int j = 0; j < h; j++) | |
1334 | for (int i = 0; i < w; i++) | |
1335 | { | |
1336 | if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1)) | |
1337 | { | |
1338 | data[0] = r2; | |
1339 | data[1] = g2; | |
1340 | data[2] = b2; | |
1341 | } | |
1342 | data += 3; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const | |
1347 | { | |
1348 | wxImage image; | |
1349 | ||
1350 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
1351 | ||
1352 | image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); | |
1353 | ||
1354 | unsigned char *dest = image.GetData(); | |
1355 | ||
1356 | wxCHECK_MSG( dest, image, wxT("unable to create image") ); | |
1357 | ||
1358 | unsigned char *src = M_IMGDATA->m_data; | |
1359 | bool hasMask = M_IMGDATA->m_hasMask; | |
1360 | unsigned char maskRed = M_IMGDATA->m_maskRed; | |
1361 | unsigned char maskGreen = M_IMGDATA->m_maskGreen; | |
1362 | unsigned char maskBlue = M_IMGDATA->m_maskBlue; | |
1363 | ||
1364 | if ( hasMask ) | |
1365 | image.SetMaskColour(maskRed, maskGreen, maskBlue); | |
1366 | ||
1367 | const long size = M_IMGDATA->m_width * M_IMGDATA->m_height; | |
1368 | for ( long i = 0; i < size; i++, src += 3, dest += 3 ) | |
1369 | { | |
1370 | // don't modify the mask | |
1371 | if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue ) | |
1372 | { | |
1373 | memcpy(dest, src, 3); | |
1374 | } | |
1375 | else | |
1376 | { | |
1377 | // calculate the luma | |
1378 | double luma = (src[0] * lr + src[1] * lg + src[2] * lb) + 0.5; | |
1379 | dest[0] = dest[1] = dest[2] = wx_static_cast(unsigned char, luma); | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | // copy the alpha channel, if any | |
1384 | if (HasAlpha()) | |
1385 | { | |
1386 | const size_t alphaSize = GetWidth() * GetHeight(); | |
1387 | unsigned char *alpha = (unsigned char*)malloc(alphaSize); | |
1388 | memcpy(alpha, GetAlpha(), alphaSize); | |
1389 | image.InitAlpha(); | |
1390 | image.SetAlpha(alpha); | |
1391 | } | |
1392 | ||
1393 | return image; | |
1394 | } | |
1395 | ||
1396 | wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const | |
1397 | { | |
1398 | wxImage image; | |
1399 | ||
1400 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); | |
1401 | ||
1402 | image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); | |
1403 | ||
1404 | unsigned char *data = image.GetData(); | |
1405 | ||
1406 | wxCHECK_MSG( data, image, wxT("unable to create image") ); | |
1407 | ||
1408 | if (M_IMGDATA->m_hasMask) | |
1409 | { | |
1410 | if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g && | |
1411 | M_IMGDATA->m_maskBlue == b) | |
1412 | image.SetMaskColour( 255, 255, 255 ); | |
1413 | else | |
1414 | image.SetMaskColour( 0, 0, 0 ); | |
1415 | } | |
1416 | ||
1417 | long size = M_IMGDATA->m_height * M_IMGDATA->m_width; | |
1418 | ||
1419 | unsigned char *srcd = M_IMGDATA->m_data; | |
1420 | unsigned char *tard = image.GetData(); | |
1421 | ||
1422 | for ( long i = 0; i < size; i++, srcd += 3, tard += 3 ) | |
1423 | { | |
1424 | if (srcd[0] == r && srcd[1] == g && srcd[2] == b) | |
1425 | tard[0] = tard[1] = tard[2] = 255; | |
1426 | else | |
1427 | tard[0] = tard[1] = tard[2] = 0; | |
1428 | } | |
1429 | ||
1430 | return image; | |
1431 | } | |
1432 | ||
1433 | int wxImage::GetWidth() const | |
1434 | { | |
1435 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); | |
1436 | ||
1437 | return M_IMGDATA->m_width; | |
1438 | } | |
1439 | ||
1440 | int wxImage::GetHeight() const | |
1441 | { | |
1442 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); | |
1443 | ||
1444 | return M_IMGDATA->m_height; | |
1445 | } | |
1446 | ||
1447 | long wxImage::XYToIndex(int x, int y) const | |
1448 | { | |
1449 | if ( Ok() && | |
1450 | x >= 0 && y >= 0 && | |
1451 | x < M_IMGDATA->m_width && y < M_IMGDATA->m_height ) | |
1452 | { | |
1453 | return y*M_IMGDATA->m_width + x; | |
1454 | } | |
1455 | ||
1456 | return -1; | |
1457 | } | |
1458 | ||
1459 | void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) | |
1460 | { | |
1461 | long pos = XYToIndex(x, y); | |
1462 | wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); | |
1463 | ||
1464 | AllocExclusive(); | |
1465 | ||
1466 | pos *= 3; | |
1467 | ||
1468 | M_IMGDATA->m_data[ pos ] = r; | |
1469 | M_IMGDATA->m_data[ pos+1 ] = g; | |
1470 | M_IMGDATA->m_data[ pos+2 ] = b; | |
1471 | } | |
1472 | ||
1473 | void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b ) | |
1474 | { | |
1475 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1476 | ||
1477 | AllocExclusive(); | |
1478 | ||
1479 | wxRect rect(rect_); | |
1480 | wxRect imageRect(0, 0, GetWidth(), GetHeight()); | |
1481 | if ( rect == wxRect() ) | |
1482 | { | |
1483 | rect = imageRect; | |
1484 | } | |
1485 | else | |
1486 | { | |
1487 | wxCHECK_RET( imageRect.Contains(rect.GetTopLeft()) && | |
1488 | imageRect.Contains(rect.GetBottomRight()), | |
1489 | wxT("invalid bounding rectangle") ); | |
1490 | } | |
1491 | ||
1492 | int x1 = rect.GetLeft(), | |
1493 | y1 = rect.GetTop(), | |
1494 | x2 = rect.GetRight() + 1, | |
1495 | y2 = rect.GetBottom() + 1; | |
1496 | ||
1497 | unsigned char *data wxDUMMY_INITIALIZE(NULL); | |
1498 | int x, y, width = GetWidth(); | |
1499 | for (y = y1; y < y2; y++) | |
1500 | { | |
1501 | data = M_IMGDATA->m_data + (y*width + x1)*3; | |
1502 | for (x = x1; x < x2; x++) | |
1503 | { | |
1504 | *data++ = r; | |
1505 | *data++ = g; | |
1506 | *data++ = b; | |
1507 | } | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | unsigned char wxImage::GetRed( int x, int y ) const | |
1512 | { | |
1513 | long pos = XYToIndex(x, y); | |
1514 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); | |
1515 | ||
1516 | pos *= 3; | |
1517 | ||
1518 | return M_IMGDATA->m_data[pos]; | |
1519 | } | |
1520 | ||
1521 | unsigned char wxImage::GetGreen( int x, int y ) const | |
1522 | { | |
1523 | long pos = XYToIndex(x, y); | |
1524 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); | |
1525 | ||
1526 | pos *= 3; | |
1527 | ||
1528 | return M_IMGDATA->m_data[pos+1]; | |
1529 | } | |
1530 | ||
1531 | unsigned char wxImage::GetBlue( int x, int y ) const | |
1532 | { | |
1533 | long pos = XYToIndex(x, y); | |
1534 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); | |
1535 | ||
1536 | pos *= 3; | |
1537 | ||
1538 | return M_IMGDATA->m_data[pos+2]; | |
1539 | } | |
1540 | ||
1541 | bool wxImage::IsOk() const | |
1542 | { | |
1543 | // image of 0 width or height can't be considered ok - at least because it | |
1544 | // causes crashes in ConvertToBitmap() if we don't catch it in time | |
1545 | wxImageRefData *data = M_IMGDATA; | |
1546 | return data && data->m_ok && data->m_width && data->m_height; | |
1547 | } | |
1548 | ||
1549 | unsigned char *wxImage::GetData() const | |
1550 | { | |
1551 | wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); | |
1552 | ||
1553 | return M_IMGDATA->m_data; | |
1554 | } | |
1555 | ||
1556 | void wxImage::SetData( unsigned char *data, bool static_data ) | |
1557 | { | |
1558 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1559 | ||
1560 | wxImageRefData *newRefData = new wxImageRefData(); | |
1561 | ||
1562 | newRefData->m_width = M_IMGDATA->m_width; | |
1563 | newRefData->m_height = M_IMGDATA->m_height; | |
1564 | newRefData->m_data = data; | |
1565 | newRefData->m_ok = true; | |
1566 | newRefData->m_maskRed = M_IMGDATA->m_maskRed; | |
1567 | newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; | |
1568 | newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; | |
1569 | newRefData->m_hasMask = M_IMGDATA->m_hasMask; | |
1570 | newRefData->m_static = static_data; | |
1571 | ||
1572 | UnRef(); | |
1573 | ||
1574 | m_refData = newRefData; | |
1575 | } | |
1576 | ||
1577 | void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data ) | |
1578 | { | |
1579 | wxImageRefData *newRefData = new wxImageRefData(); | |
1580 | ||
1581 | if (m_refData) | |
1582 | { | |
1583 | newRefData->m_width = new_width; | |
1584 | newRefData->m_height = new_height; | |
1585 | newRefData->m_data = data; | |
1586 | newRefData->m_ok = true; | |
1587 | newRefData->m_maskRed = M_IMGDATA->m_maskRed; | |
1588 | newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; | |
1589 | newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; | |
1590 | newRefData->m_hasMask = M_IMGDATA->m_hasMask; | |
1591 | } | |
1592 | else | |
1593 | { | |
1594 | newRefData->m_width = new_width; | |
1595 | newRefData->m_height = new_height; | |
1596 | newRefData->m_data = data; | |
1597 | newRefData->m_ok = true; | |
1598 | } | |
1599 | newRefData->m_static = static_data; | |
1600 | ||
1601 | UnRef(); | |
1602 | ||
1603 | m_refData = newRefData; | |
1604 | } | |
1605 | ||
1606 | // ---------------------------------------------------------------------------- | |
1607 | // alpha channel support | |
1608 | // ---------------------------------------------------------------------------- | |
1609 | ||
1610 | void wxImage::SetAlpha(int x, int y, unsigned char alpha) | |
1611 | { | |
1612 | wxCHECK_RET( HasAlpha(), wxT("no alpha channel") ); | |
1613 | ||
1614 | long pos = XYToIndex(x, y); | |
1615 | wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); | |
1616 | ||
1617 | AllocExclusive(); | |
1618 | ||
1619 | M_IMGDATA->m_alpha[pos] = alpha; | |
1620 | } | |
1621 | ||
1622 | unsigned char wxImage::GetAlpha(int x, int y) const | |
1623 | { | |
1624 | wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") ); | |
1625 | ||
1626 | long pos = XYToIndex(x, y); | |
1627 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); | |
1628 | ||
1629 | return M_IMGDATA->m_alpha[pos]; | |
1630 | } | |
1631 | ||
1632 | bool | |
1633 | wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b) | |
1634 | { | |
1635 | SetAlpha(NULL); | |
1636 | ||
1637 | const int w = M_IMGDATA->m_width; | |
1638 | const int h = M_IMGDATA->m_height; | |
1639 | ||
1640 | unsigned char *alpha = GetAlpha(); | |
1641 | unsigned char *data = GetData(); | |
1642 | ||
1643 | for ( int y = 0; y < h; y++ ) | |
1644 | { | |
1645 | for ( int x = 0; x < w; x++ ) | |
1646 | { | |
1647 | *alpha++ = *data; | |
1648 | *data++ = r; | |
1649 | *data++ = g; | |
1650 | *data++ = b; | |
1651 | } | |
1652 | } | |
1653 | ||
1654 | return true; | |
1655 | } | |
1656 | ||
1657 | void wxImage::SetAlpha( unsigned char *alpha, bool static_data ) | |
1658 | { | |
1659 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1660 | ||
1661 | AllocExclusive(); | |
1662 | ||
1663 | if ( !alpha ) | |
1664 | { | |
1665 | alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height); | |
1666 | } | |
1667 | ||
1668 | if( !M_IMGDATA->m_staticAlpha ) | |
1669 | free(M_IMGDATA->m_alpha); | |
1670 | ||
1671 | M_IMGDATA->m_alpha = alpha; | |
1672 | M_IMGDATA->m_staticAlpha = static_data; | |
1673 | } | |
1674 | ||
1675 | unsigned char *wxImage::GetAlpha() const | |
1676 | { | |
1677 | wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); | |
1678 | ||
1679 | return M_IMGDATA->m_alpha; | |
1680 | } | |
1681 | ||
1682 | void wxImage::InitAlpha() | |
1683 | { | |
1684 | wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") ); | |
1685 | ||
1686 | // initialize memory for alpha channel | |
1687 | SetAlpha(); | |
1688 | ||
1689 | unsigned char *alpha = M_IMGDATA->m_alpha; | |
1690 | const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height; | |
1691 | ||
1692 | if ( HasMask() ) | |
1693 | { | |
1694 | // use the mask to initialize the alpha channel. | |
1695 | const unsigned char * const alphaEnd = alpha + lenAlpha; | |
1696 | ||
1697 | const unsigned char mr = M_IMGDATA->m_maskRed; | |
1698 | const unsigned char mg = M_IMGDATA->m_maskGreen; | |
1699 | const unsigned char mb = M_IMGDATA->m_maskBlue; | |
1700 | for ( unsigned char *src = M_IMGDATA->m_data; | |
1701 | alpha < alphaEnd; | |
1702 | src += 3, alpha++ ) | |
1703 | { | |
1704 | *alpha = (src[0] == mr && src[1] == mg && src[2] == mb) | |
1705 | ? wxIMAGE_ALPHA_TRANSPARENT | |
1706 | : wxIMAGE_ALPHA_OPAQUE; | |
1707 | } | |
1708 | ||
1709 | M_IMGDATA->m_hasMask = false; | |
1710 | } | |
1711 | else // no mask | |
1712 | { | |
1713 | // make the image fully opaque | |
1714 | memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha); | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | // ---------------------------------------------------------------------------- | |
1719 | // mask support | |
1720 | // ---------------------------------------------------------------------------- | |
1721 | ||
1722 | void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) | |
1723 | { | |
1724 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1725 | ||
1726 | AllocExclusive(); | |
1727 | ||
1728 | M_IMGDATA->m_maskRed = r; | |
1729 | M_IMGDATA->m_maskGreen = g; | |
1730 | M_IMGDATA->m_maskBlue = b; | |
1731 | M_IMGDATA->m_hasMask = true; | |
1732 | } | |
1733 | ||
1734 | bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const | |
1735 | { | |
1736 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); | |
1737 | ||
1738 | if (M_IMGDATA->m_hasMask) | |
1739 | { | |
1740 | if (r) *r = M_IMGDATA->m_maskRed; | |
1741 | if (g) *g = M_IMGDATA->m_maskGreen; | |
1742 | if (b) *b = M_IMGDATA->m_maskBlue; | |
1743 | return true; | |
1744 | } | |
1745 | else | |
1746 | { | |
1747 | FindFirstUnusedColour(r, g, b); | |
1748 | return false; | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | unsigned char wxImage::GetMaskRed() const | |
1753 | { | |
1754 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); | |
1755 | ||
1756 | return M_IMGDATA->m_maskRed; | |
1757 | } | |
1758 | ||
1759 | unsigned char wxImage::GetMaskGreen() const | |
1760 | { | |
1761 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); | |
1762 | ||
1763 | return M_IMGDATA->m_maskGreen; | |
1764 | } | |
1765 | ||
1766 | unsigned char wxImage::GetMaskBlue() const | |
1767 | { | |
1768 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); | |
1769 | ||
1770 | return M_IMGDATA->m_maskBlue; | |
1771 | } | |
1772 | ||
1773 | void wxImage::SetMask( bool mask ) | |
1774 | { | |
1775 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1776 | ||
1777 | AllocExclusive(); | |
1778 | ||
1779 | M_IMGDATA->m_hasMask = mask; | |
1780 | } | |
1781 | ||
1782 | bool wxImage::HasMask() const | |
1783 | { | |
1784 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); | |
1785 | ||
1786 | return M_IMGDATA->m_hasMask; | |
1787 | } | |
1788 | ||
1789 | bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const | |
1790 | { | |
1791 | long pos = XYToIndex(x, y); | |
1792 | wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") ); | |
1793 | ||
1794 | // check mask | |
1795 | if ( M_IMGDATA->m_hasMask ) | |
1796 | { | |
1797 | const unsigned char *p = M_IMGDATA->m_data + 3*pos; | |
1798 | if ( p[0] == M_IMGDATA->m_maskRed && | |
1799 | p[1] == M_IMGDATA->m_maskGreen && | |
1800 | p[2] == M_IMGDATA->m_maskBlue ) | |
1801 | { | |
1802 | return true; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | // then check alpha | |
1807 | if ( M_IMGDATA->m_alpha ) | |
1808 | { | |
1809 | if ( M_IMGDATA->m_alpha[pos] < threshold ) | |
1810 | { | |
1811 | // transparent enough | |
1812 | return true; | |
1813 | } | |
1814 | } | |
1815 | ||
1816 | // not transparent | |
1817 | return false; | |
1818 | } | |
1819 | ||
1820 | bool wxImage::SetMaskFromImage(const wxImage& mask, | |
1821 | unsigned char mr, unsigned char mg, unsigned char mb) | |
1822 | { | |
1823 | // check that the images are the same size | |
1824 | if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) ) | |
1825 | { | |
1826 | wxLogError( _("Image and mask have different sizes.") ); | |
1827 | return false; | |
1828 | } | |
1829 | ||
1830 | // find unused colour | |
1831 | unsigned char r,g,b ; | |
1832 | if (!FindFirstUnusedColour(&r, &g, &b)) | |
1833 | { | |
1834 | wxLogError( _("No unused colour in image being masked.") ); | |
1835 | return false ; | |
1836 | } | |
1837 | ||
1838 | AllocExclusive(); | |
1839 | ||
1840 | unsigned char *imgdata = GetData(); | |
1841 | unsigned char *maskdata = mask.GetData(); | |
1842 | ||
1843 | const int w = GetWidth(); | |
1844 | const int h = GetHeight(); | |
1845 | ||
1846 | for (int j = 0; j < h; j++) | |
1847 | { | |
1848 | for (int i = 0; i < w; i++) | |
1849 | { | |
1850 | if ((maskdata[0] == mr) && (maskdata[1] == mg) && (maskdata[2] == mb)) | |
1851 | { | |
1852 | imgdata[0] = r; | |
1853 | imgdata[1] = g; | |
1854 | imgdata[2] = b; | |
1855 | } | |
1856 | imgdata += 3; | |
1857 | maskdata += 3; | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | SetMaskColour(r, g, b); | |
1862 | SetMask(true); | |
1863 | ||
1864 | return true; | |
1865 | } | |
1866 | ||
1867 | bool wxImage::ConvertAlphaToMask(unsigned char threshold) | |
1868 | { | |
1869 | if (!HasAlpha()) | |
1870 | return true; | |
1871 | ||
1872 | unsigned char mr, mg, mb; | |
1873 | if (!FindFirstUnusedColour(&mr, &mg, &mb)) | |
1874 | { | |
1875 | wxLogError( _("No unused colour in image being masked.") ); | |
1876 | return false; | |
1877 | } | |
1878 | ||
1879 | AllocExclusive(); | |
1880 | ||
1881 | SetMask(true); | |
1882 | SetMaskColour(mr, mg, mb); | |
1883 | ||
1884 | unsigned char *imgdata = GetData(); | |
1885 | unsigned char *alphadata = GetAlpha(); | |
1886 | ||
1887 | int w = GetWidth(); | |
1888 | int h = GetHeight(); | |
1889 | ||
1890 | for (int y = 0; y < h; y++) | |
1891 | { | |
1892 | for (int x = 0; x < w; x++, imgdata += 3, alphadata++) | |
1893 | { | |
1894 | if (*alphadata < threshold) | |
1895 | { | |
1896 | imgdata[0] = mr; | |
1897 | imgdata[1] = mg; | |
1898 | imgdata[2] = mb; | |
1899 | } | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | if( !M_IMGDATA->m_staticAlpha ) | |
1904 | free(M_IMGDATA->m_alpha); | |
1905 | ||
1906 | M_IMGDATA->m_alpha = NULL; | |
1907 | M_IMGDATA->m_staticAlpha = false; | |
1908 | ||
1909 | return true; | |
1910 | } | |
1911 | ||
1912 | // ---------------------------------------------------------------------------- | |
1913 | // Palette functions | |
1914 | // ---------------------------------------------------------------------------- | |
1915 | ||
1916 | #if wxUSE_PALETTE | |
1917 | ||
1918 | bool wxImage::HasPalette() const | |
1919 | { | |
1920 | if (!Ok()) | |
1921 | return false; | |
1922 | ||
1923 | return M_IMGDATA->m_palette.Ok(); | |
1924 | } | |
1925 | ||
1926 | const wxPalette& wxImage::GetPalette() const | |
1927 | { | |
1928 | wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") ); | |
1929 | ||
1930 | return M_IMGDATA->m_palette; | |
1931 | } | |
1932 | ||
1933 | void wxImage::SetPalette(const wxPalette& palette) | |
1934 | { | |
1935 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1936 | ||
1937 | AllocExclusive(); | |
1938 | ||
1939 | M_IMGDATA->m_palette = palette; | |
1940 | } | |
1941 | ||
1942 | #endif // wxUSE_PALETTE | |
1943 | ||
1944 | // ---------------------------------------------------------------------------- | |
1945 | // Option functions (arbitrary name/value mapping) | |
1946 | // ---------------------------------------------------------------------------- | |
1947 | ||
1948 | void wxImage::SetOption(const wxString& name, const wxString& value) | |
1949 | { | |
1950 | wxCHECK_RET( Ok(), wxT("invalid image") ); | |
1951 | ||
1952 | AllocExclusive(); | |
1953 | ||
1954 | int idx = M_IMGDATA->m_optionNames.Index(name, false); | |
1955 | if (idx == wxNOT_FOUND) | |
1956 | { | |
1957 | M_IMGDATA->m_optionNames.Add(name); | |
1958 | M_IMGDATA->m_optionValues.Add(value); | |
1959 | } | |
1960 | else | |
1961 | { | |
1962 | M_IMGDATA->m_optionNames[idx] = name; | |
1963 | M_IMGDATA->m_optionValues[idx] = value; | |
1964 | } | |
1965 | } | |
1966 | ||
1967 | void wxImage::SetOption(const wxString& name, int value) | |
1968 | { | |
1969 | wxString valStr; | |
1970 | valStr.Printf(wxT("%d"), value); | |
1971 | SetOption(name, valStr); | |
1972 | } | |
1973 | ||
1974 | wxString wxImage::GetOption(const wxString& name) const | |
1975 | { | |
1976 | wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") ); | |
1977 | ||
1978 | int idx = M_IMGDATA->m_optionNames.Index(name, false); | |
1979 | if (idx == wxNOT_FOUND) | |
1980 | return wxEmptyString; | |
1981 | else | |
1982 | return M_IMGDATA->m_optionValues[idx]; | |
1983 | } | |
1984 | ||
1985 | int wxImage::GetOptionInt(const wxString& name) const | |
1986 | { | |
1987 | return wxAtoi(GetOption(name)); | |
1988 | } | |
1989 | ||
1990 | bool wxImage::HasOption(const wxString& name) const | |
1991 | { | |
1992 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); | |
1993 | ||
1994 | return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND); | |
1995 | } | |
1996 | ||
1997 | // ---------------------------------------------------------------------------- | |
1998 | // image I/O | |
1999 | // ---------------------------------------------------------------------------- | |
2000 | ||
2001 | bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), | |
2002 | long WXUNUSED_UNLESS_STREAMS(type), | |
2003 | int WXUNUSED_UNLESS_STREAMS(index) ) | |
2004 | { | |
2005 | #if HAS_FILE_STREAMS | |
2006 | if (wxFileExists(filename)) | |
2007 | { | |
2008 | wxImageFileInputStream stream(filename); | |
2009 | wxBufferedInputStream bstream( stream ); | |
2010 | return LoadFile(bstream, type, index); | |
2011 | } | |
2012 | else | |
2013 | { | |
2014 | wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); | |
2015 | ||
2016 | return false; | |
2017 | } | |
2018 | #else // !HAS_FILE_STREAMS | |
2019 | return false; | |
2020 | #endif // HAS_FILE_STREAMS | |
2021 | } | |
2022 | ||
2023 | bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), | |
2024 | const wxString& WXUNUSED_UNLESS_STREAMS(mimetype), | |
2025 | int WXUNUSED_UNLESS_STREAMS(index) ) | |
2026 | { | |
2027 | #if HAS_FILE_STREAMS | |
2028 | if (wxFileExists(filename)) | |
2029 | { | |
2030 | wxImageFileInputStream stream(filename); | |
2031 | wxBufferedInputStream bstream( stream ); | |
2032 | return LoadFile(bstream, mimetype, index); | |
2033 | } | |
2034 | else | |
2035 | { | |
2036 | wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); | |
2037 | ||
2038 | return false; | |
2039 | } | |
2040 | #else // !HAS_FILE_STREAMS | |
2041 | return false; | |
2042 | #endif // HAS_FILE_STREAMS | |
2043 | } | |
2044 | ||
2045 | ||
2046 | ||
2047 | bool wxImage::SaveFile( const wxString& filename ) const | |
2048 | { | |
2049 | wxString ext = filename.AfterLast('.').Lower(); | |
2050 | ||
2051 | wxImageHandler * pHandler = FindHandler(ext, -1); | |
2052 | if (pHandler) | |
2053 | { | |
2054 | SaveFile(filename, pHandler->GetType()); | |
2055 | return true; | |
2056 | } | |
2057 | ||
2058 | wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str()); | |
2059 | ||
2060 | return false; | |
2061 | } | |
2062 | ||
2063 | bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), | |
2064 | int WXUNUSED_UNLESS_STREAMS(type) ) const | |
2065 | { | |
2066 | #if HAS_FILE_STREAMS | |
2067 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); | |
2068 | ||
2069 | ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); | |
2070 | ||
2071 | wxImageFileOutputStream stream(filename); | |
2072 | ||
2073 | if ( stream.IsOk() ) | |
2074 | { | |
2075 | wxBufferedOutputStream bstream( stream ); | |
2076 | return SaveFile(bstream, type); | |
2077 | } | |
2078 | #endif // HAS_FILE_STREAMS | |
2079 | ||
2080 | return false; | |
2081 | } | |
2082 | ||
2083 | bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), | |
2084 | const wxString& WXUNUSED_UNLESS_STREAMS(mimetype) ) const | |
2085 | { | |
2086 | #if HAS_FILE_STREAMS | |
2087 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); | |
2088 | ||
2089 | ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); | |
2090 | ||
2091 | wxImageFileOutputStream stream(filename); | |
2092 | ||
2093 | if ( stream.IsOk() ) | |
2094 | { | |
2095 | wxBufferedOutputStream bstream( stream ); | |
2096 | return SaveFile(bstream, mimetype); | |
2097 | } | |
2098 | #endif // HAS_FILE_STREAMS | |
2099 | ||
2100 | return false; | |
2101 | } | |
2102 | ||
2103 | bool wxImage::CanRead( const wxString& WXUNUSED_UNLESS_STREAMS(name) ) | |
2104 | { | |
2105 | #if HAS_FILE_STREAMS | |
2106 | wxImageFileInputStream stream(name); | |
2107 | return CanRead(stream); | |
2108 | #else | |
2109 | return false; | |
2110 | #endif | |
2111 | } | |
2112 | ||
2113 | int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name), | |
2114 | long WXUNUSED_UNLESS_STREAMS(type) ) | |
2115 | { | |
2116 | #if HAS_FILE_STREAMS | |
2117 | wxImageFileInputStream stream(name); | |
2118 | if (stream.Ok()) | |
2119 | return GetImageCount(stream, type); | |
2120 | #endif | |
2121 | ||
2122 | return 0; | |
2123 | } | |
2124 | ||
2125 | #if wxUSE_STREAMS | |
2126 | ||
2127 | bool wxImage::CanRead( wxInputStream &stream ) | |
2128 | { | |
2129 | const wxList& list = GetHandlers(); | |
2130 | ||
2131 | for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) | |
2132 | { | |
2133 | wxImageHandler *handler=(wxImageHandler*)node->GetData(); | |
2134 | if (handler->CanRead( stream )) | |
2135 | return true; | |
2136 | } | |
2137 | ||
2138 | return false; | |
2139 | } | |
2140 | ||
2141 | int wxImage::GetImageCount( wxInputStream &stream, long type ) | |
2142 | { | |
2143 | wxImageHandler *handler; | |
2144 | ||
2145 | if ( type == wxBITMAP_TYPE_ANY ) | |
2146 | { | |
2147 | wxList &list=GetHandlers(); | |
2148 | ||
2149 | for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext()) | |
2150 | { | |
2151 | handler=(wxImageHandler*)node->GetData(); | |
2152 | if ( handler->CanRead(stream) ) | |
2153 | return handler->GetImageCount(stream); | |
2154 | ||
2155 | } | |
2156 | ||
2157 | wxLogWarning(_("No handler found for image type.")); | |
2158 | return 0; | |
2159 | } | |
2160 | ||
2161 | handler = FindHandler(type); | |
2162 | ||
2163 | if ( !handler ) | |
2164 | { | |
2165 | wxLogWarning(_("No image handler for type %ld defined."), type); | |
2166 | return false; | |
2167 | } | |
2168 | ||
2169 | if ( handler->CanRead(stream) ) | |
2170 | { | |
2171 | return handler->GetImageCount(stream); | |
2172 | } | |
2173 | else | |
2174 | { | |
2175 | wxLogError(_("Image file is not of type %ld."), type); | |
2176 | return 0; | |
2177 | } | |
2178 | } | |
2179 | ||
2180 | bool wxImage::LoadFile( wxInputStream& stream, long type, int index ) | |
2181 | { | |
2182 | UnRef(); | |
2183 | ||
2184 | m_refData = new wxImageRefData; | |
2185 | ||
2186 | wxImageHandler *handler; | |
2187 | ||
2188 | if ( type == wxBITMAP_TYPE_ANY ) | |
2189 | { | |
2190 | wxList &list=GetHandlers(); | |
2191 | ||
2192 | for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) | |
2193 | { | |
2194 | handler=(wxImageHandler*)node->GetData(); | |
2195 | if ( handler->CanRead(stream) ) | |
2196 | return handler->LoadFile(this, stream, true/*verbose*/, index); | |
2197 | ||
2198 | } | |
2199 | ||
2200 | wxLogWarning( _("No handler found for image type.") ); | |
2201 | return false; | |
2202 | } | |
2203 | ||
2204 | handler = FindHandler(type); | |
2205 | ||
2206 | if (handler == 0) | |
2207 | { | |
2208 | wxLogWarning( _("No image handler for type %ld defined."), type ); | |
2209 | ||
2210 | return false; | |
2211 | } | |
2212 | ||
2213 | if (stream.IsSeekable() && !handler->CanRead(stream)) | |
2214 | { | |
2215 | wxLogError(_("Image file is not of type %ld."), type); | |
2216 | return false; | |
2217 | } | |
2218 | else | |
2219 | return handler->LoadFile(this, stream, true/*verbose*/, index); | |
2220 | } | |
2221 | ||
2222 | bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index ) | |
2223 | { | |
2224 | UnRef(); | |
2225 | ||
2226 | m_refData = new wxImageRefData; | |
2227 | ||
2228 | wxImageHandler *handler = FindHandlerMime(mimetype); | |
2229 | ||
2230 | if (handler == 0) | |
2231 | { | |
2232 | wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); | |
2233 | ||
2234 | return false; | |
2235 | } | |
2236 | ||
2237 | if (stream.IsSeekable() && !handler->CanRead(stream)) | |
2238 | { | |
2239 | wxLogError(_("Image file is not of type %s."), mimetype); | |
2240 | return false; | |
2241 | } | |
2242 | else | |
2243 | return handler->LoadFile( this, stream, true/*verbose*/, index ); | |
2244 | } | |
2245 | ||
2246 | bool wxImage::SaveFile( wxOutputStream& stream, int type ) const | |
2247 | { | |
2248 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); | |
2249 | ||
2250 | wxImageHandler *handler = FindHandler(type); | |
2251 | if ( !handler ) | |
2252 | { | |
2253 | wxLogWarning( _("No image handler for type %d defined."), type ); | |
2254 | ||
2255 | return false; | |
2256 | } | |
2257 | ||
2258 | return handler->SaveFile( (wxImage*)this, stream ); | |
2259 | } | |
2260 | ||
2261 | bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const | |
2262 | { | |
2263 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); | |
2264 | ||
2265 | wxImageHandler *handler = FindHandlerMime(mimetype); | |
2266 | if ( !handler ) | |
2267 | { | |
2268 | wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); | |
2269 | ||
2270 | return false; | |
2271 | } | |
2272 | ||
2273 | return handler->SaveFile( (wxImage*)this, stream ); | |
2274 | } | |
2275 | #endif // wxUSE_STREAMS | |
2276 | ||
2277 | // ---------------------------------------------------------------------------- | |
2278 | // image I/O handlers | |
2279 | // ---------------------------------------------------------------------------- | |
2280 | ||
2281 | void wxImage::AddHandler( wxImageHandler *handler ) | |
2282 | { | |
2283 | // Check for an existing handler of the type being added. | |
2284 | if (FindHandler( handler->GetType() ) == 0) | |
2285 | { | |
2286 | sm_handlers.Append( handler ); | |
2287 | } | |
2288 | else | |
2289 | { | |
2290 | // This is not documented behaviour, merely the simplest 'fix' | |
2291 | // for preventing duplicate additions. If someone ever has | |
2292 | // a good reason to add and remove duplicate handlers (and they | |
2293 | // may) we should probably refcount the duplicates. | |
2294 | // also an issue in InsertHandler below. | |
2295 | ||
2296 | wxLogDebug( _T("Adding duplicate image handler for '%s'"), | |
2297 | handler->GetName().c_str() ); | |
2298 | delete handler; | |
2299 | } | |
2300 | } | |
2301 | ||
2302 | void wxImage::InsertHandler( wxImageHandler *handler ) | |
2303 | { | |
2304 | // Check for an existing handler of the type being added. | |
2305 | if (FindHandler( handler->GetType() ) == 0) | |
2306 | { | |
2307 | sm_handlers.Insert( handler ); | |
2308 | } | |
2309 | else | |
2310 | { | |
2311 | // see AddHandler for additional comments. | |
2312 | wxLogDebug( _T("Inserting duplicate image handler for '%s'"), | |
2313 | handler->GetName().c_str() ); | |
2314 | delete handler; | |
2315 | } | |
2316 | } | |
2317 | ||
2318 | bool wxImage::RemoveHandler( const wxString& name ) | |
2319 | { | |
2320 | wxImageHandler *handler = FindHandler(name); | |
2321 | if (handler) | |
2322 | { | |
2323 | sm_handlers.DeleteObject(handler); | |
2324 | delete handler; | |
2325 | return true; | |
2326 | } | |
2327 | else | |
2328 | return false; | |
2329 | } | |
2330 | ||
2331 | wxImageHandler *wxImage::FindHandler( const wxString& name ) | |
2332 | { | |
2333 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); | |
2334 | while (node) | |
2335 | { | |
2336 | wxImageHandler *handler = (wxImageHandler*)node->GetData(); | |
2337 | if (handler->GetName().Cmp(name) == 0) return handler; | |
2338 | ||
2339 | node = node->GetNext(); | |
2340 | } | |
2341 | return 0; | |
2342 | } | |
2343 | ||
2344 | wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType ) | |
2345 | { | |
2346 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); | |
2347 | while (node) | |
2348 | { | |
2349 | wxImageHandler *handler = (wxImageHandler*)node->GetData(); | |
2350 | if ( (handler->GetExtension().Cmp(extension) == 0) && | |
2351 | (bitmapType == -1 || handler->GetType() == bitmapType) ) | |
2352 | return handler; | |
2353 | node = node->GetNext(); | |
2354 | } | |
2355 | return 0; | |
2356 | } | |
2357 | ||
2358 | wxImageHandler *wxImage::FindHandler( long bitmapType ) | |
2359 | { | |
2360 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); | |
2361 | while (node) | |
2362 | { | |
2363 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); | |
2364 | if (handler->GetType() == bitmapType) return handler; | |
2365 | node = node->GetNext(); | |
2366 | } | |
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) | |
2371 | { | |
2372 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); | |
2373 | while (node) | |
2374 | { | |
2375 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); | |
2376 | if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler; | |
2377 | node = node->GetNext(); | |
2378 | } | |
2379 | return 0; | |
2380 | } | |
2381 | ||
2382 | void wxImage::InitStandardHandlers() | |
2383 | { | |
2384 | #if wxUSE_STREAMS | |
2385 | AddHandler(new wxBMPHandler); | |
2386 | #endif // wxUSE_STREAMS | |
2387 | } | |
2388 | ||
2389 | void wxImage::CleanUpHandlers() | |
2390 | { | |
2391 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); | |
2392 | while (node) | |
2393 | { | |
2394 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); | |
2395 | wxList::compatibility_iterator next = node->GetNext(); | |
2396 | delete handler; | |
2397 | node = next; | |
2398 | } | |
2399 | ||
2400 | sm_handlers.Clear(); | |
2401 | } | |
2402 | ||
2403 | wxString wxImage::GetImageExtWildcard() | |
2404 | { | |
2405 | wxString fmts; | |
2406 | ||
2407 | wxList& Handlers = wxImage::GetHandlers(); | |
2408 | wxList::compatibility_iterator Node = Handlers.GetFirst(); | |
2409 | while ( Node ) | |
2410 | { | |
2411 | wxImageHandler* Handler = (wxImageHandler*)Node->GetData(); | |
2412 | fmts += wxT("*.") + Handler->GetExtension(); | |
2413 | Node = Node->GetNext(); | |
2414 | if ( Node ) fmts += wxT(";"); | |
2415 | } | |
2416 | ||
2417 | return wxT("(") + fmts + wxT(")|") + fmts; | |
2418 | } | |
2419 | ||
2420 | wxImage::HSVValue wxImage::RGBtoHSV(const RGBValue& rgb) | |
2421 | { | |
2422 | const double red = rgb.red / 255.0, | |
2423 | green = rgb.green / 255.0, | |
2424 | blue = rgb.blue / 255.0; | |
2425 | ||
2426 | // find the min and max intensity (and remember which one was it for the | |
2427 | // latter) | |
2428 | double minimumRGB = red; | |
2429 | if ( green < minimumRGB ) | |
2430 | minimumRGB = green; | |
2431 | if ( blue < minimumRGB ) | |
2432 | minimumRGB = blue; | |
2433 | ||
2434 | enum { RED, GREEN, BLUE } chMax = RED; | |
2435 | double maximumRGB = red; | |
2436 | if ( green > maximumRGB ) | |
2437 | { | |
2438 | chMax = GREEN; | |
2439 | maximumRGB = green; | |
2440 | } | |
2441 | if ( blue > maximumRGB ) | |
2442 | { | |
2443 | chMax = BLUE; | |
2444 | maximumRGB = blue; | |
2445 | } | |
2446 | ||
2447 | const double value = maximumRGB; | |
2448 | ||
2449 | double hue = 0.0, saturation; | |
2450 | const double deltaRGB = maximumRGB - minimumRGB; | |
2451 | if ( wxIsNullDouble(deltaRGB) ) | |
2452 | { | |
2453 | // Gray has no color | |
2454 | hue = 0.0; | |
2455 | saturation = 0.0; | |
2456 | } | |
2457 | else | |
2458 | { | |
2459 | switch ( chMax ) | |
2460 | { | |
2461 | case RED: | |
2462 | hue = (green - blue) / deltaRGB; | |
2463 | break; | |
2464 | ||
2465 | case GREEN: | |
2466 | hue = 2.0 + (blue - red) / deltaRGB; | |
2467 | break; | |
2468 | ||
2469 | case BLUE: | |
2470 | hue = 4.0 + (red - green) / deltaRGB; | |
2471 | break; | |
2472 | ||
2473 | default: | |
2474 | wxFAIL_MSG(wxT("hue not specified")); | |
2475 | break; | |
2476 | } | |
2477 | ||
2478 | hue /= 6.0; | |
2479 | ||
2480 | if ( hue < 0.0 ) | |
2481 | hue += 1.0; | |
2482 | ||
2483 | saturation = deltaRGB / maximumRGB; | |
2484 | } | |
2485 | ||
2486 | return HSVValue(hue, saturation, value); | |
2487 | } | |
2488 | ||
2489 | wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv) | |
2490 | { | |
2491 | double red, green, blue; | |
2492 | ||
2493 | if ( wxIsNullDouble(hsv.saturation) ) | |
2494 | { | |
2495 | // Grey | |
2496 | red = hsv.value; | |
2497 | green = hsv.value; | |
2498 | blue = hsv.value; | |
2499 | } | |
2500 | else // not grey | |
2501 | { | |
2502 | double hue = hsv.hue * 6.0; // sector 0 to 5 | |
2503 | int i = (int)floor(hue); | |
2504 | double f = hue - i; // fractional part of h | |
2505 | double p = hsv.value * (1.0 - hsv.saturation); | |
2506 | ||
2507 | switch (i) | |
2508 | { | |
2509 | case 0: | |
2510 | red = hsv.value; | |
2511 | green = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); | |
2512 | blue = p; | |
2513 | break; | |
2514 | ||
2515 | case 1: | |
2516 | red = hsv.value * (1.0 - hsv.saturation * f); | |
2517 | green = hsv.value; | |
2518 | blue = p; | |
2519 | break; | |
2520 | ||
2521 | case 2: | |
2522 | red = p; | |
2523 | green = hsv.value; | |
2524 | blue = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); | |
2525 | break; | |
2526 | ||
2527 | case 3: | |
2528 | red = p; | |
2529 | green = hsv.value * (1.0 - hsv.saturation * f); | |
2530 | blue = hsv.value; | |
2531 | break; | |
2532 | ||
2533 | case 4: | |
2534 | red = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); | |
2535 | green = p; | |
2536 | blue = hsv.value; | |
2537 | break; | |
2538 | ||
2539 | default: // case 5: | |
2540 | red = hsv.value; | |
2541 | green = p; | |
2542 | blue = hsv.value * (1.0 - hsv.saturation * f); | |
2543 | break; | |
2544 | } | |
2545 | } | |
2546 | ||
2547 | return RGBValue((unsigned char)(red * 255.0), | |
2548 | (unsigned char)(green * 255.0), | |
2549 | (unsigned char)(blue * 255.0)); | |
2550 | } | |
2551 | ||
2552 | /* | |
2553 | * Rotates the hue of each pixel of the image. angle is a double in the range | |
2554 | * -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees | |
2555 | */ | |
2556 | void wxImage::RotateHue(double angle) | |
2557 | { | |
2558 | AllocExclusive(); | |
2559 | ||
2560 | unsigned char *srcBytePtr; | |
2561 | unsigned char *dstBytePtr; | |
2562 | unsigned long count; | |
2563 | wxImage::HSVValue hsv; | |
2564 | wxImage::RGBValue rgb; | |
2565 | ||
2566 | wxASSERT (angle >= -1.0 && angle <= 1.0); | |
2567 | count = M_IMGDATA->m_width * M_IMGDATA->m_height; | |
2568 | if ( count > 0 && !wxIsNullDouble(angle) ) | |
2569 | { | |
2570 | srcBytePtr = M_IMGDATA->m_data; | |
2571 | dstBytePtr = srcBytePtr; | |
2572 | do | |
2573 | { | |
2574 | rgb.red = *srcBytePtr++; | |
2575 | rgb.green = *srcBytePtr++; | |
2576 | rgb.blue = *srcBytePtr++; | |
2577 | hsv = RGBtoHSV(rgb); | |
2578 | ||
2579 | hsv.hue = hsv.hue + angle; | |
2580 | if (hsv.hue > 1.0) | |
2581 | hsv.hue = hsv.hue - 1.0; | |
2582 | else if (hsv.hue < 0.0) | |
2583 | hsv.hue = hsv.hue + 1.0; | |
2584 | ||
2585 | rgb = HSVtoRGB(hsv); | |
2586 | *dstBytePtr++ = rgb.red; | |
2587 | *dstBytePtr++ = rgb.green; | |
2588 | *dstBytePtr++ = rgb.blue; | |
2589 | } while (--count != 0); | |
2590 | } | |
2591 | } | |
2592 | ||
2593 | //----------------------------------------------------------------------------- | |
2594 | // wxImageHandler | |
2595 | //----------------------------------------------------------------------------- | |
2596 | ||
2597 | IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject) | |
2598 | ||
2599 | #if wxUSE_STREAMS | |
2600 | bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) ) | |
2601 | { | |
2602 | return false; | |
2603 | } | |
2604 | ||
2605 | bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) ) | |
2606 | { | |
2607 | return false; | |
2608 | } | |
2609 | ||
2610 | int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) ) | |
2611 | { | |
2612 | return 1; | |
2613 | } | |
2614 | ||
2615 | bool wxImageHandler::CanRead( const wxString& name ) | |
2616 | { | |
2617 | if (wxFileExists(name)) | |
2618 | { | |
2619 | wxImageFileInputStream stream(name); | |
2620 | return CanRead(stream); | |
2621 | } | |
2622 | ||
2623 | wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() ); | |
2624 | ||
2625 | return false; | |
2626 | } | |
2627 | ||
2628 | bool wxImageHandler::CallDoCanRead(wxInputStream& stream) | |
2629 | { | |
2630 | wxFileOffset posOld = stream.TellI(); | |
2631 | if ( posOld == wxInvalidOffset ) | |
2632 | { | |
2633 | // can't test unseekable stream | |
2634 | return false; | |
2635 | } | |
2636 | ||
2637 | bool ok = DoCanRead(stream); | |
2638 | ||
2639 | // restore the old position to be able to test other formats and so on | |
2640 | if ( stream.SeekI(posOld) == wxInvalidOffset ) | |
2641 | { | |
2642 | wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!")); | |
2643 | ||
2644 | // reading would fail anyhow as we're not at the right position | |
2645 | return false; | |
2646 | } | |
2647 | ||
2648 | return ok; | |
2649 | } | |
2650 | ||
2651 | #endif // wxUSE_STREAMS | |
2652 | ||
2653 | /* static */ | |
2654 | wxImageResolution | |
2655 | wxImageHandler::GetResolutionFromOptions(const wxImage& image, int *x, int *y) | |
2656 | { | |
2657 | wxCHECK_MSG( x && y, wxIMAGE_RESOLUTION_NONE, _T("NULL pointer") ); | |
2658 | ||
2659 | if ( image.HasOption(wxIMAGE_OPTION_RESOLUTIONX) && | |
2660 | image.HasOption(wxIMAGE_OPTION_RESOLUTIONY) ) | |
2661 | { | |
2662 | *x = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX); | |
2663 | *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY); | |
2664 | } | |
2665 | else if ( image.HasOption(wxIMAGE_OPTION_RESOLUTION) ) | |
2666 | { | |
2667 | *x = | |
2668 | *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTION); | |
2669 | } | |
2670 | else // no resolution options specified | |
2671 | { | |
2672 | *x = | |
2673 | *y = 0; | |
2674 | ||
2675 | return wxIMAGE_RESOLUTION_NONE; | |
2676 | } | |
2677 | ||
2678 | // get the resolution unit too | |
2679 | int resUnit = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT); | |
2680 | if ( !resUnit ) | |
2681 | { | |
2682 | // this is the default | |
2683 | resUnit = wxIMAGE_RESOLUTION_INCHES; | |
2684 | } | |
2685 | ||
2686 | return (wxImageResolution)resUnit; | |
2687 | } | |
2688 | ||
2689 | // ---------------------------------------------------------------------------- | |
2690 | // image histogram stuff | |
2691 | // ---------------------------------------------------------------------------- | |
2692 | ||
2693 | bool | |
2694 | wxImageHistogram::FindFirstUnusedColour(unsigned char *r, | |
2695 | unsigned char *g, | |
2696 | unsigned char *b, | |
2697 | unsigned char r2, | |
2698 | unsigned char b2, | |
2699 | unsigned char g2) const | |
2700 | { | |
2701 | unsigned long key = MakeKey(r2, g2, b2); | |
2702 | ||
2703 | while ( find(key) != end() ) | |
2704 | { | |
2705 | // color already used | |
2706 | r2++; | |
2707 | if ( r2 >= 255 ) | |
2708 | { | |
2709 | r2 = 0; | |
2710 | g2++; | |
2711 | if ( g2 >= 255 ) | |
2712 | { | |
2713 | g2 = 0; | |
2714 | b2++; | |
2715 | if ( b2 >= 255 ) | |
2716 | { | |
2717 | wxLogError(_("No unused colour in image.") ); | |
2718 | return false; | |
2719 | } | |
2720 | } | |
2721 | } | |
2722 | ||
2723 | key = MakeKey(r2, g2, b2); | |
2724 | } | |
2725 | ||
2726 | if ( r ) | |
2727 | *r = r2; | |
2728 | if ( g ) | |
2729 | *g = g2; | |
2730 | if ( b ) | |
2731 | *b = b2; | |
2732 | ||
2733 | return true; | |
2734 | } | |
2735 | ||
2736 | bool | |
2737 | wxImage::FindFirstUnusedColour(unsigned char *r, | |
2738 | unsigned char *g, | |
2739 | unsigned char *b, | |
2740 | unsigned char r2, | |
2741 | unsigned char b2, | |
2742 | unsigned char g2) const | |
2743 | { | |
2744 | wxImageHistogram histogram; | |
2745 | ||
2746 | ComputeHistogram(histogram); | |
2747 | ||
2748 | return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2); | |
2749 | } | |
2750 | ||
2751 | ||
2752 | ||
2753 | // GRG, Dic/99 | |
2754 | // Counts and returns the number of different colours. Optionally stops | |
2755 | // when it exceeds 'stopafter' different colours. This is useful, for | |
2756 | // example, to see if the image can be saved as 8-bit (256 colour or | |
2757 | // less, in this case it would be invoked as CountColours(256)). Default | |
2758 | // value for stopafter is -1 (don't care). | |
2759 | // | |
2760 | unsigned long wxImage::CountColours( unsigned long stopafter ) const | |
2761 | { | |
2762 | wxHashTable h; | |
2763 | wxObject dummy; | |
2764 | unsigned char r, g, b; | |
2765 | unsigned char *p; | |
2766 | unsigned long size, nentries, key; | |
2767 | ||
2768 | p = GetData(); | |
2769 | size = GetWidth() * GetHeight(); | |
2770 | nentries = 0; | |
2771 | ||
2772 | for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++) | |
2773 | { | |
2774 | r = *(p++); | |
2775 | g = *(p++); | |
2776 | b = *(p++); | |
2777 | key = wxImageHistogram::MakeKey(r, g, b); | |
2778 | ||
2779 | if (h.Get(key) == NULL) | |
2780 | { | |
2781 | h.Put(key, &dummy); | |
2782 | nentries++; | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | return nentries; | |
2787 | } | |
2788 | ||
2789 | ||
2790 | unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const | |
2791 | { | |
2792 | unsigned char *p = GetData(); | |
2793 | unsigned long nentries = 0; | |
2794 | ||
2795 | h.clear(); | |
2796 | ||
2797 | const unsigned long size = GetWidth() * GetHeight(); | |
2798 | ||
2799 | unsigned char r, g, b; | |
2800 | for ( unsigned long n = 0; n < size; n++ ) | |
2801 | { | |
2802 | r = *p++; | |
2803 | g = *p++; | |
2804 | b = *p++; | |
2805 | ||
2806 | wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)]; | |
2807 | ||
2808 | if ( entry.value++ == 0 ) | |
2809 | entry.index = nentries++; | |
2810 | } | |
2811 | ||
2812 | return nentries; | |
2813 | } | |
2814 | ||
2815 | /* | |
2816 | * Rotation code by Carlos Moreno | |
2817 | */ | |
2818 | ||
2819 | static const double wxROTATE_EPSILON = 1e-10; | |
2820 | ||
2821 | // Auxiliary function to rotate a point (x,y) with respect to point p0 | |
2822 | // make it inline and use a straight return to facilitate optimization | |
2823 | // also, the function receives the sine and cosine of the angle to avoid | |
2824 | // repeating the time-consuming calls to these functions -- sin/cos can | |
2825 | // be computed and stored in the calling function. | |
2826 | ||
2827 | static inline wxRealPoint | |
2828 | wxRotatePoint(const wxRealPoint& p, double cos_angle, double sin_angle, | |
2829 | const wxRealPoint& p0) | |
2830 | { | |
2831 | return wxRealPoint(p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle, | |
2832 | p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle); | |
2833 | } | |
2834 | ||
2835 | static inline wxRealPoint | |
2836 | wxRotatePoint(double x, double y, double cos_angle, double sin_angle, | |
2837 | const wxRealPoint & p0) | |
2838 | { | |
2839 | return wxRotatePoint (wxRealPoint(x,y), cos_angle, sin_angle, p0); | |
2840 | } | |
2841 | ||
2842 | wxImage wxImage::Rotate(double angle, | |
2843 | const wxPoint& centre_of_rotation, | |
2844 | bool interpolating, | |
2845 | wxPoint *offset_after_rotation) const | |
2846 | { | |
2847 | // screen coordinates are a mirror image of "real" coordinates | |
2848 | angle = -angle; | |
2849 | ||
2850 | const bool has_alpha = HasAlpha(); | |
2851 | ||
2852 | const int w = GetWidth(); | |
2853 | const int h = GetHeight(); | |
2854 | ||
2855 | int i; | |
2856 | ||
2857 | // Create pointer-based array to accelerate access to wxImage's data | |
2858 | unsigned char ** data = new unsigned char * [h]; | |
2859 | data[0] = GetData(); | |
2860 | for (i = 1; i < h; i++) | |
2861 | data[i] = data[i - 1] + (3 * w); | |
2862 | ||
2863 | // Same for alpha channel | |
2864 | unsigned char ** alpha = NULL; | |
2865 | if (has_alpha) | |
2866 | { | |
2867 | alpha = new unsigned char * [h]; | |
2868 | alpha[0] = GetAlpha(); | |
2869 | for (i = 1; i < h; i++) | |
2870 | alpha[i] = alpha[i - 1] + w; | |
2871 | } | |
2872 | ||
2873 | // precompute coefficients for rotation formula | |
2874 | const double cos_angle = cos(angle); | |
2875 | const double sin_angle = sin(angle); | |
2876 | ||
2877 | // Create new Image to store the result | |
2878 | // First, find rectangle that covers the rotated image; to do that, | |
2879 | // rotate the four corners | |
2880 | ||
2881 | const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y); | |
2882 | ||
2883 | wxRealPoint p1 = wxRotatePoint (0, 0, cos_angle, sin_angle, p0); | |
2884 | wxRealPoint p2 = wxRotatePoint (0, h, cos_angle, sin_angle, p0); | |
2885 | wxRealPoint p3 = wxRotatePoint (w, 0, cos_angle, sin_angle, p0); | |
2886 | wxRealPoint p4 = wxRotatePoint (w, h, cos_angle, sin_angle, p0); | |
2887 | ||
2888 | int x1a = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x))); | |
2889 | int y1a = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y))); | |
2890 | int x2a = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x))); | |
2891 | int y2a = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y))); | |
2892 | ||
2893 | // Create rotated image | |
2894 | wxImage rotated (x2a - x1a + 1, y2a - y1a + 1, false); | |
2895 | // With alpha channel | |
2896 | if (has_alpha) | |
2897 | rotated.SetAlpha(); | |
2898 | ||
2899 | if (offset_after_rotation != NULL) | |
2900 | { | |
2901 | *offset_after_rotation = wxPoint (x1a, y1a); | |
2902 | } | |
2903 | ||
2904 | // the rotated (destination) image is always accessed sequentially via this | |
2905 | // pointer, there is no need for pointer-based arrays here | |
2906 | unsigned char *dst = rotated.GetData(); | |
2907 | ||
2908 | unsigned char *alpha_dst = has_alpha ? rotated.GetAlpha() : NULL; | |
2909 | ||
2910 | // if the original image has a mask, use its RGB values as the blank pixel, | |
2911 | // else, fall back to default (black). | |
2912 | unsigned char blank_r = 0; | |
2913 | unsigned char blank_g = 0; | |
2914 | unsigned char blank_b = 0; | |
2915 | ||
2916 | if (HasMask()) | |
2917 | { | |
2918 | blank_r = GetMaskRed(); | |
2919 | blank_g = GetMaskGreen(); | |
2920 | blank_b = GetMaskBlue(); | |
2921 | rotated.SetMaskColour( blank_r, blank_g, blank_b ); | |
2922 | } | |
2923 | ||
2924 | // Now, for each point of the rotated image, find where it came from, by | |
2925 | // performing an inverse rotation (a rotation of -angle) and getting the | |
2926 | // pixel at those coordinates | |
2927 | ||
2928 | const int rH = rotated.GetHeight(); | |
2929 | const int rW = rotated.GetWidth(); | |
2930 | ||
2931 | // do the (interpolating) test outside of the loops, so that it is done | |
2932 | // only once, instead of repeating it for each pixel. | |
2933 | if (interpolating) | |
2934 | { | |
2935 | for (int y = 0; y < rH; y++) | |
2936 | { | |
2937 | for (int x = 0; x < rW; x++) | |
2938 | { | |
2939 | wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0); | |
2940 | ||
2941 | if (-0.25 < src.x && src.x < w - 0.75 && | |
2942 | -0.25 < src.y && src.y < h - 0.75) | |
2943 | { | |
2944 | // interpolate using the 4 enclosing grid-points. Those | |
2945 | // points can be obtained using floor and ceiling of the | |
2946 | // exact coordinates of the point | |
2947 | int x1, y1, x2, y2; | |
2948 | ||
2949 | if (0 < src.x && src.x < w - 1) | |
2950 | { | |
2951 | x1 = wxRound(floor(src.x)); | |
2952 | x2 = wxRound(ceil(src.x)); | |
2953 | } | |
2954 | else // else means that x is near one of the borders (0 or width-1) | |
2955 | { | |
2956 | x1 = x2 = wxRound (src.x); | |
2957 | } | |
2958 | ||
2959 | if (0 < src.y && src.y < h - 1) | |
2960 | { | |
2961 | y1 = wxRound(floor(src.y)); | |
2962 | y2 = wxRound(ceil(src.y)); | |
2963 | } | |
2964 | else | |
2965 | { | |
2966 | y1 = y2 = wxRound (src.y); | |
2967 | } | |
2968 | ||
2969 | // get four points and the distances (square of the distance, | |
2970 | // for efficiency reasons) for the interpolation formula | |
2971 | ||
2972 | // GRG: Do not calculate the points until they are | |
2973 | // really needed -- this way we can calculate | |
2974 | // just one, instead of four, if d1, d2, d3 | |
2975 | // or d4 are < wxROTATE_EPSILON | |
2976 | ||
2977 | const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1); | |
2978 | const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1); | |
2979 | const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2); | |
2980 | const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2); | |
2981 | ||
2982 | // Now interpolate as a weighted average of the four surrounding | |
2983 | // points, where the weights are the distances to each of those points | |
2984 | ||
2985 | // If the point is exactly at one point of the grid of the source | |
2986 | // image, then don't interpolate -- just assign the pixel | |
2987 | ||
2988 | // d1,d2,d3,d4 are positive -- no need for abs() | |
2989 | if (d1 < wxROTATE_EPSILON) | |
2990 | { | |
2991 | unsigned char *p = data[y1] + (3 * x1); | |
2992 | *(dst++) = *(p++); | |
2993 | *(dst++) = *(p++); | |
2994 | *(dst++) = *p; | |
2995 | ||
2996 | if (has_alpha) | |
2997 | *(alpha_dst++) = *(alpha[y1] + x1); | |
2998 | } | |
2999 | else if (d2 < wxROTATE_EPSILON) | |
3000 | { | |
3001 | unsigned char *p = data[y1] + (3 * x2); | |
3002 | *(dst++) = *(p++); | |
3003 | *(dst++) = *(p++); | |
3004 | *(dst++) = *p; | |
3005 | ||
3006 | if (has_alpha) | |
3007 | *(alpha_dst++) = *(alpha[y1] + x2); | |
3008 | } | |
3009 | else if (d3 < wxROTATE_EPSILON) | |
3010 | { | |
3011 | unsigned char *p = data[y2] + (3 * x2); | |
3012 | *(dst++) = *(p++); | |
3013 | *(dst++) = *(p++); | |
3014 | *(dst++) = *p; | |
3015 | ||
3016 | if (has_alpha) | |
3017 | *(alpha_dst++) = *(alpha[y2] + x2); | |
3018 | } | |
3019 | else if (d4 < wxROTATE_EPSILON) | |
3020 | { | |
3021 | unsigned char *p = data[y2] + (3 * x1); | |
3022 | *(dst++) = *(p++); | |
3023 | *(dst++) = *(p++); | |
3024 | *(dst++) = *p; | |
3025 | ||
3026 | if (has_alpha) | |
3027 | *(alpha_dst++) = *(alpha[y2] + x1); | |
3028 | } | |
3029 | else | |
3030 | { | |
3031 | // weights for the weighted average are proportional to the inverse of the distance | |
3032 | unsigned char *v1 = data[y1] + (3 * x1); | |
3033 | unsigned char *v2 = data[y1] + (3 * x2); | |
3034 | unsigned char *v3 = data[y2] + (3 * x2); | |
3035 | unsigned char *v4 = data[y2] + (3 * x1); | |
3036 | ||
3037 | const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4; | |
3038 | ||
3039 | // GRG: Unrolled. | |
3040 | ||
3041 | *(dst++) = (unsigned char) | |
3042 | ( (w1 * *(v1++) + w2 * *(v2++) + | |
3043 | w3 * *(v3++) + w4 * *(v4++)) / | |
3044 | (w1 + w2 + w3 + w4) ); | |
3045 | *(dst++) = (unsigned char) | |
3046 | ( (w1 * *(v1++) + w2 * *(v2++) + | |
3047 | w3 * *(v3++) + w4 * *(v4++)) / | |
3048 | (w1 + w2 + w3 + w4) ); | |
3049 | *(dst++) = (unsigned char) | |
3050 | ( (w1 * *v1 + w2 * *v2 + | |
3051 | w3 * *v3 + w4 * *v4) / | |
3052 | (w1 + w2 + w3 + w4) ); | |
3053 | ||
3054 | if (has_alpha) | |
3055 | { | |
3056 | v1 = alpha[y1] + (x1); | |
3057 | v2 = alpha[y1] + (x2); | |
3058 | v3 = alpha[y2] + (x2); | |
3059 | v4 = alpha[y2] + (x1); | |
3060 | ||
3061 | *(alpha_dst++) = (unsigned char) | |
3062 | ( (w1 * *v1 + w2 * *v2 + | |
3063 | w3 * *v3 + w4 * *v4) / | |
3064 | (w1 + w2 + w3 + w4) ); | |
3065 | } | |
3066 | } | |
3067 | } | |
3068 | else | |
3069 | { | |
3070 | *(dst++) = blank_r; | |
3071 | *(dst++) = blank_g; | |
3072 | *(dst++) = blank_b; | |
3073 | ||
3074 | if (has_alpha) | |
3075 | *(alpha_dst++) = 0; | |
3076 | } | |
3077 | } | |
3078 | } | |
3079 | } | |
3080 | else // not interpolating | |
3081 | { | |
3082 | for (int y = 0; y < rH; y++) | |
3083 | { | |
3084 | for (int x = 0; x < rW; x++) | |
3085 | { | |
3086 | wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0); | |
3087 | ||
3088 | const int xs = wxRound (src.x); // wxRound rounds to the | |
3089 | const int ys = wxRound (src.y); // closest integer | |
3090 | ||
3091 | if (0 <= xs && xs < w && 0 <= ys && ys < h) | |
3092 | { | |
3093 | unsigned char *p = data[ys] + (3 * xs); | |
3094 | *(dst++) = *(p++); | |
3095 | *(dst++) = *(p++); | |
3096 | *(dst++) = *p; | |
3097 | ||
3098 | if (has_alpha) | |
3099 | *(alpha_dst++) = *(alpha[ys] + (xs)); | |
3100 | } | |
3101 | else | |
3102 | { | |
3103 | *(dst++) = blank_r; | |
3104 | *(dst++) = blank_g; | |
3105 | *(dst++) = blank_b; | |
3106 | ||
3107 | if (has_alpha) | |
3108 | *(alpha_dst++) = 255; | |
3109 | } | |
3110 | } | |
3111 | } | |
3112 | } | |
3113 | ||
3114 | delete [] data; | |
3115 | delete [] alpha; | |
3116 | ||
3117 | return rotated; | |
3118 | } | |
3119 | ||
3120 | ||
3121 | ||
3122 | ||
3123 | ||
3124 | // A module to allow wxImage initialization/cleanup | |
3125 | // without calling these functions from app.cpp or from | |
3126 | // the user's application. | |
3127 | ||
3128 | class wxImageModule: public wxModule | |
3129 | { | |
3130 | DECLARE_DYNAMIC_CLASS(wxImageModule) | |
3131 | public: | |
3132 | wxImageModule() {} | |
3133 | bool OnInit() { wxImage::InitStandardHandlers(); return true; } | |
3134 | void OnExit() { wxImage::CleanUpHandlers(); } | |
3135 | }; | |
3136 | ||
3137 | IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule) | |
3138 | ||
3139 | ||
3140 | #endif // wxUSE_IMAGE |