| 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 | unsigned char* src_data = M_IMGDATA->m_data; |
| 542 | unsigned char* src_alpha = M_IMGDATA->m_alpha; |
| 543 | unsigned char* dst_data = ret_image.GetData(); |
| 544 | unsigned char* dst_alpha = NULL; |
| 545 | |
| 546 | if ( src_alpha ) |
| 547 | { |
| 548 | ret_image.SetAlpha(); |
| 549 | dst_alpha = ret_image.GetAlpha(); |
| 550 | } |
| 551 | |
| 552 | int averaged_pixels, src_pixel_index; |
| 553 | double sum_r, sum_g, sum_b, sum_a; |
| 554 | |
| 555 | for ( int y = 0; y < height; y++ ) // Destination image - Y direction |
| 556 | { |
| 557 | // Source pixel in the Y direction |
| 558 | int src_y = (int)(y * scale_factor_y); |
| 559 | |
| 560 | for ( int x = 0; x < width; x++ ) // Destination image - X direction |
| 561 | { |
| 562 | // Source pixel in the X direction |
| 563 | int src_x = (int)(x * scale_factor_x); |
| 564 | |
| 565 | // Box of pixels to average |
| 566 | averaged_pixels = 0; |
| 567 | sum_r = sum_g = sum_b = sum_a = 0.0; |
| 568 | |
| 569 | for ( int j = int(src_y - scale_factor_y/2.0 + 1); |
| 570 | j <= int(src_y + scale_factor_y_2); |
| 571 | j++ ) |
| 572 | { |
| 573 | // We don't care to average pixels that don't exist (edges) |
| 574 | if ( j < 0 || j > M_IMGDATA->m_height - 1 ) |
| 575 | continue; |
| 576 | |
| 577 | for ( int i = int(src_x - scale_factor_x/2.0 + 1); |
| 578 | i <= src_x + scale_factor_x_2; |
| 579 | i++ ) |
| 580 | { |
| 581 | // Don't average edge pixels |
| 582 | if ( i < 0 || i > M_IMGDATA->m_width - 1 ) |
| 583 | continue; |
| 584 | |
| 585 | // Calculate the actual index in our source pixels |
| 586 | src_pixel_index = j * M_IMGDATA->m_width + i; |
| 587 | |
| 588 | sum_r += src_data[src_pixel_index * 3 + 0]; |
| 589 | sum_g += src_data[src_pixel_index * 3 + 1]; |
| 590 | sum_b += src_data[src_pixel_index * 3 + 2]; |
| 591 | if ( src_alpha ) |
| 592 | sum_a += src_alpha[src_pixel_index]; |
| 593 | |
| 594 | averaged_pixels++; |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | // Calculate the average from the sum and number of averaged pixels |
| 599 | dst_data[0] = (unsigned char)(sum_r / averaged_pixels); |
| 600 | dst_data[1] = (unsigned char)(sum_g / averaged_pixels); |
| 601 | dst_data[2] = (unsigned char)(sum_b / averaged_pixels); |
| 602 | dst_data += 3; |
| 603 | if ( src_alpha ) |
| 604 | *dst_alpha++ = (unsigned char)(sum_a / averaged_pixels); |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | return ret_image; |
| 609 | } |
| 610 | |
| 611 | // The following two local functions are for the B-spline weighting of the |
| 612 | // bicubic sampling algorithm |
| 613 | static inline double spline_cube(double value) |
| 614 | { |
| 615 | return value <= 0.0 ? 0.0 : value * value * value; |
| 616 | } |
| 617 | |
| 618 | static inline double spline_weight(double value) |
| 619 | { |
| 620 | return (spline_cube(value + 2) - |
| 621 | 4 * spline_cube(value + 1) + |
| 622 | 6 * spline_cube(value) - |
| 623 | 4 * spline_cube(value - 1)) / 6; |
| 624 | } |
| 625 | |
| 626 | // This is the bicubic resampling algorithm |
| 627 | wxImage wxImage::ResampleBicubic(int width, int height) const |
| 628 | { |
| 629 | // This function implements a Bicubic B-Spline algorithm for resampling. |
| 630 | // This method is certainly a little slower than wxImage's default pixel |
| 631 | // replication method, however for most reasonably sized images not being |
| 632 | // upsampled too much on a fairly average CPU this difference is hardly |
| 633 | // noticeable and the results are far more pleasing to look at. |
| 634 | // |
| 635 | // This particular bicubic algorithm does pixel weighting according to a |
| 636 | // B-Spline that basically implements a Gaussian bell-like weighting |
| 637 | // kernel. Because of this method the results may appear a bit blurry when |
| 638 | // upsampling by large factors. This is basically because a slight |
| 639 | // gaussian blur is being performed to get the smooth look of the upsampled |
| 640 | // image. |
| 641 | |
| 642 | // Edge pixels: 3-4 possible solutions |
| 643 | // - (Wrap/tile) Wrap the image, take the color value from the opposite |
| 644 | // side of the image. |
| 645 | // - (Mirror) Duplicate edge pixels, so that pixel at coordinate (2, n), |
| 646 | // where n is nonpositive, will have the value of (2, 1). |
| 647 | // - (Ignore) Simply ignore the edge pixels and apply the kernel only to |
| 648 | // pixels which do have all neighbours. |
| 649 | // - (Clamp) Choose the nearest pixel along the border. This takes the |
| 650 | // border pixels and extends them out to infinity. |
| 651 | // |
| 652 | // NOTE: below the y_offset and x_offset variables are being set for edge |
| 653 | // pixels using the "Mirror" method mentioned above |
| 654 | |
| 655 | wxImage ret_image; |
| 656 | |
| 657 | ret_image.Create(width, height, false); |
| 658 | |
| 659 | unsigned char* src_data = M_IMGDATA->m_data; |
| 660 | unsigned char* src_alpha = M_IMGDATA->m_alpha; |
| 661 | unsigned char* dst_data = ret_image.GetData(); |
| 662 | unsigned char* dst_alpha = NULL; |
| 663 | |
| 664 | if ( src_alpha ) |
| 665 | { |
| 666 | ret_image.SetAlpha(); |
| 667 | dst_alpha = ret_image.GetAlpha(); |
| 668 | } |
| 669 | |
| 670 | for ( int dsty = 0; dsty < height; dsty++ ) |
| 671 | { |
| 672 | // We need to calculate the source pixel to interpolate from - Y-axis |
| 673 | double srcpixy = double(dsty * M_IMGDATA->m_height) / height; |
| 674 | double dy = srcpixy - (int)srcpixy; |
| 675 | |
| 676 | for ( int dstx = 0; dstx < width; dstx++ ) |
| 677 | { |
| 678 | // X-axis of pixel to interpolate from |
| 679 | double srcpixx = double(dstx * M_IMGDATA->m_width) / width; |
| 680 | double dx = srcpixx - (int)srcpixx; |
| 681 | |
| 682 | // Sums for each color channel |
| 683 | double sum_r = 0, sum_g = 0, sum_b = 0, sum_a = 0; |
| 684 | |
| 685 | // Here we actually determine the RGBA values for the destination pixel |
| 686 | for ( int k = -1; k <= 2; k++ ) |
| 687 | { |
| 688 | // Y offset |
| 689 | int y_offset = srcpixy + k < 0.0 |
| 690 | ? 0 |
| 691 | : srcpixy + k >= M_IMGDATA->m_height |
| 692 | ? M_IMGDATA->m_height - 1 |
| 693 | : (int)(srcpixy + k); |
| 694 | |
| 695 | // Loop across the X axis |
| 696 | for ( int i = -1; i <= 2; i++ ) |
| 697 | { |
| 698 | // X offset |
| 699 | int x_offset = srcpixx + i < 0.0 |
| 700 | ? 0 |
| 701 | : srcpixx + i >= M_IMGDATA->m_width |
| 702 | ? M_IMGDATA->m_width - 1 |
| 703 | : (int)(srcpixx + i); |
| 704 | |
| 705 | // Calculate the exact position where the source data |
| 706 | // should be pulled from based on the x_offset and y_offset |
| 707 | int src_pixel_index = y_offset*M_IMGDATA->m_width + x_offset; |
| 708 | |
| 709 | // Calculate the weight for the specified pixel according |
| 710 | // to the bicubic b-spline kernel we're using for |
| 711 | // interpolation |
| 712 | double |
| 713 | pixel_weight = spline_weight(i - dx)*spline_weight(k - dy); |
| 714 | |
| 715 | // Create a sum of all velues for each color channel |
| 716 | // adjusted for the pixel's calculated weight |
| 717 | sum_r += src_data[src_pixel_index * 3 + 0] * pixel_weight; |
| 718 | sum_g += src_data[src_pixel_index * 3 + 1] * pixel_weight; |
| 719 | sum_b += src_data[src_pixel_index * 3 + 2] * pixel_weight; |
| 720 | if ( src_alpha ) |
| 721 | sum_a += src_alpha[src_pixel_index] * pixel_weight; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | // Put the data into the destination image. The summed values are |
| 726 | // of double data type and are rounded here for accuracy |
| 727 | dst_data[0] = (unsigned char)(sum_r + 0.5); |
| 728 | dst_data[1] = (unsigned char)(sum_g + 0.5); |
| 729 | dst_data[2] = (unsigned char)(sum_b + 0.5); |
| 730 | dst_data += 3; |
| 731 | |
| 732 | if ( src_alpha ) |
| 733 | *dst_alpha++ = (unsigned char)sum_a; |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | return ret_image; |
| 738 | } |
| 739 | |
| 740 | // Blur in the horizontal direction |
| 741 | wxImage wxImage::BlurHorizontal(int blurRadius) const |
| 742 | { |
| 743 | wxImage ret_image; |
| 744 | ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); |
| 745 | |
| 746 | unsigned char* src_data = M_IMGDATA->m_data; |
| 747 | unsigned char* dst_data = ret_image.GetData(); |
| 748 | unsigned char* src_alpha = M_IMGDATA->m_alpha; |
| 749 | unsigned char* dst_alpha = NULL; |
| 750 | |
| 751 | // Check for a mask or alpha |
| 752 | if ( src_alpha ) |
| 753 | { |
| 754 | ret_image.SetAlpha(); |
| 755 | dst_alpha = ret_image.GetAlpha(); |
| 756 | } |
| 757 | else if ( M_IMGDATA->m_hasMask ) |
| 758 | { |
| 759 | ret_image.SetMaskColour(M_IMGDATA->m_maskRed, |
| 760 | M_IMGDATA->m_maskGreen, |
| 761 | M_IMGDATA->m_maskBlue); |
| 762 | } |
| 763 | |
| 764 | // number of pixels we average over |
| 765 | const int blurArea = blurRadius*2 + 1; |
| 766 | |
| 767 | // Horizontal blurring algorithm - average all pixels in the specified blur |
| 768 | // radius in the X or horizontal direction |
| 769 | for ( int y = 0; y < M_IMGDATA->m_height; y++ ) |
| 770 | { |
| 771 | // Variables used in the blurring algorithm |
| 772 | long sum_r = 0, |
| 773 | sum_g = 0, |
| 774 | sum_b = 0, |
| 775 | sum_a = 0; |
| 776 | |
| 777 | long pixel_idx; |
| 778 | const unsigned char *src; |
| 779 | unsigned char *dst; |
| 780 | |
| 781 | // Calculate the average of all pixels in the blur radius for the first |
| 782 | // pixel of the row |
| 783 | for ( int kernel_x = -blurRadius; kernel_x <= blurRadius; kernel_x++ ) |
| 784 | { |
| 785 | // To deal with the pixels at the start of a row so it's not |
| 786 | // grabbing GOK values from memory at negative indices of the |
| 787 | // image's data or grabbing from the previous row |
| 788 | if ( kernel_x < 0 ) |
| 789 | pixel_idx = y * M_IMGDATA->m_width; |
| 790 | else |
| 791 | pixel_idx = kernel_x + y * M_IMGDATA->m_width; |
| 792 | |
| 793 | src = src_data + pixel_idx*3; |
| 794 | sum_r += src[0]; |
| 795 | sum_g += src[1]; |
| 796 | sum_b += src[2]; |
| 797 | if ( src_alpha ) |
| 798 | sum_a += src_alpha[pixel_idx]; |
| 799 | } |
| 800 | |
| 801 | dst = dst_data + y * M_IMGDATA->m_width*3; |
| 802 | dst[0] = (unsigned char)(sum_r / blurArea); |
| 803 | dst[1] = (unsigned char)(sum_g / blurArea); |
| 804 | dst[2] = (unsigned char)(sum_b / blurArea); |
| 805 | if ( src_alpha ) |
| 806 | dst_alpha[y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); |
| 807 | |
| 808 | // Now average the values of the rest of the pixels by just moving the |
| 809 | // blur radius box along the row |
| 810 | for ( int x = 1; x < M_IMGDATA->m_width; x++ ) |
| 811 | { |
| 812 | // Take care of edge pixels on the left edge by essentially |
| 813 | // duplicating the edge pixel |
| 814 | if ( x - blurRadius - 1 < 0 ) |
| 815 | pixel_idx = y * M_IMGDATA->m_width; |
| 816 | else |
| 817 | pixel_idx = (x - blurRadius - 1) + y * M_IMGDATA->m_width; |
| 818 | |
| 819 | // Subtract the value of the pixel at the left side of the blur |
| 820 | // radius box |
| 821 | src = src_data + pixel_idx*3; |
| 822 | sum_r -= src[0]; |
| 823 | sum_g -= src[1]; |
| 824 | sum_b -= src[2]; |
| 825 | if ( src_alpha ) |
| 826 | sum_a -= src_alpha[pixel_idx]; |
| 827 | |
| 828 | // Take care of edge pixels on the right edge |
| 829 | if ( x + blurRadius > M_IMGDATA->m_width - 1 ) |
| 830 | pixel_idx = M_IMGDATA->m_width - 1 + y * M_IMGDATA->m_width; |
| 831 | else |
| 832 | pixel_idx = x + blurRadius + y * M_IMGDATA->m_width; |
| 833 | |
| 834 | // Add the value of the pixel being added to the end of our box |
| 835 | src = src_data + pixel_idx*3; |
| 836 | sum_r += src[0]; |
| 837 | sum_g += src[1]; |
| 838 | sum_b += src[2]; |
| 839 | if ( src_alpha ) |
| 840 | sum_a += src_alpha[pixel_idx]; |
| 841 | |
| 842 | // Save off the averaged data |
| 843 | dst = dst_data + x*3 + y*M_IMGDATA->m_width*3; |
| 844 | dst[0] = (unsigned char)(sum_r / blurArea); |
| 845 | dst[1] = (unsigned char)(sum_g / blurArea); |
| 846 | dst[2] = (unsigned char)(sum_b / blurArea); |
| 847 | if ( src_alpha ) |
| 848 | dst_alpha[x + y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | return ret_image; |
| 853 | } |
| 854 | |
| 855 | // Blur in the vertical direction |
| 856 | wxImage wxImage::BlurVertical(int blurRadius) const |
| 857 | { |
| 858 | wxImage ret_image; |
| 859 | ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); |
| 860 | |
| 861 | unsigned char* src_data = M_IMGDATA->m_data; |
| 862 | unsigned char* dst_data = ret_image.GetData(); |
| 863 | unsigned char* src_alpha = M_IMGDATA->m_alpha; |
| 864 | unsigned char* dst_alpha = NULL; |
| 865 | |
| 866 | // Check for a mask or alpha |
| 867 | if ( src_alpha ) |
| 868 | { |
| 869 | ret_image.SetAlpha(); |
| 870 | dst_alpha = ret_image.GetAlpha(); |
| 871 | } |
| 872 | else if ( M_IMGDATA->m_hasMask ) |
| 873 | { |
| 874 | ret_image.SetMaskColour(M_IMGDATA->m_maskRed, |
| 875 | M_IMGDATA->m_maskGreen, |
| 876 | M_IMGDATA->m_maskBlue); |
| 877 | } |
| 878 | |
| 879 | // number of pixels we average over |
| 880 | const int blurArea = blurRadius*2 + 1; |
| 881 | |
| 882 | // Vertical blurring algorithm - same as horizontal but switched the |
| 883 | // opposite direction |
| 884 | for ( int x = 0; x < M_IMGDATA->m_width; x++ ) |
| 885 | { |
| 886 | // Variables used in the blurring algorithm |
| 887 | long sum_r = 0, |
| 888 | sum_g = 0, |
| 889 | sum_b = 0, |
| 890 | sum_a = 0; |
| 891 | |
| 892 | long pixel_idx; |
| 893 | const unsigned char *src; |
| 894 | unsigned char *dst; |
| 895 | |
| 896 | // Calculate the average of all pixels in our blur radius box for the |
| 897 | // first pixel of the column |
| 898 | for ( int kernel_y = -blurRadius; kernel_y <= blurRadius; kernel_y++ ) |
| 899 | { |
| 900 | // To deal with the pixels at the start of a column so it's not |
| 901 | // grabbing GOK values from memory at negative indices of the |
| 902 | // image's data or grabbing from the previous column |
| 903 | if ( kernel_y < 0 ) |
| 904 | pixel_idx = x; |
| 905 | else |
| 906 | pixel_idx = x + kernel_y * M_IMGDATA->m_width; |
| 907 | |
| 908 | src = src_data + pixel_idx*3; |
| 909 | sum_r += src[0]; |
| 910 | sum_g += src[1]; |
| 911 | sum_b += src[2]; |
| 912 | if ( src_alpha ) |
| 913 | sum_a += src_alpha[pixel_idx]; |
| 914 | } |
| 915 | |
| 916 | dst = dst_data + x*3; |
| 917 | dst[0] = (unsigned char)(sum_r / blurArea); |
| 918 | dst[1] = (unsigned char)(sum_g / blurArea); |
| 919 | dst[2] = (unsigned char)(sum_b / blurArea); |
| 920 | if ( src_alpha ) |
| 921 | dst_alpha[x] = (unsigned char)(sum_a / blurArea); |
| 922 | |
| 923 | // Now average the values of the rest of the pixels by just moving the |
| 924 | // box along the column from top to bottom |
| 925 | for ( int y = 1; y < M_IMGDATA->m_height; y++ ) |
| 926 | { |
| 927 | // Take care of pixels that would be beyond the top edge by |
| 928 | // duplicating the top edge pixel for the column |
| 929 | if ( y - blurRadius - 1 < 0 ) |
| 930 | pixel_idx = x; |
| 931 | else |
| 932 | pixel_idx = x + (y - blurRadius - 1) * M_IMGDATA->m_width; |
| 933 | |
| 934 | // Subtract the value of the pixel at the top of our blur radius box |
| 935 | src = src_data + pixel_idx*3; |
| 936 | sum_r -= src[0]; |
| 937 | sum_g -= src[1]; |
| 938 | sum_b -= src[2]; |
| 939 | if ( src_alpha ) |
| 940 | sum_a -= src_alpha[pixel_idx]; |
| 941 | |
| 942 | // Take care of the pixels that would be beyond the bottom edge of |
| 943 | // the image similar to the top edge |
| 944 | if ( y + blurRadius > M_IMGDATA->m_height - 1 ) |
| 945 | pixel_idx = x + (M_IMGDATA->m_height - 1) * M_IMGDATA->m_width; |
| 946 | else |
| 947 | pixel_idx = x + (blurRadius + y) * M_IMGDATA->m_width; |
| 948 | |
| 949 | // Add the value of the pixel being added to the end of our box |
| 950 | src = src_data + pixel_idx*3; |
| 951 | sum_r += src[0]; |
| 952 | sum_g += src[1]; |
| 953 | sum_b += src[2]; |
| 954 | if ( src_alpha ) |
| 955 | sum_a += src_alpha[pixel_idx]; |
| 956 | |
| 957 | // Save off the averaged data |
| 958 | dst = dst_data + (x + y * M_IMGDATA->m_width) * 3; |
| 959 | dst[0] = (unsigned char)(sum_r / blurArea); |
| 960 | dst[1] = (unsigned char)(sum_g / blurArea); |
| 961 | dst[2] = (unsigned char)(sum_b / blurArea); |
| 962 | if ( src_alpha ) |
| 963 | dst_alpha[x + y * M_IMGDATA->m_width] = (unsigned char)(sum_a / blurArea); |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | return ret_image; |
| 968 | } |
| 969 | |
| 970 | // The new blur function |
| 971 | wxImage wxImage::Blur(int blurRadius) const |
| 972 | { |
| 973 | wxImage ret_image; |
| 974 | ret_image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); |
| 975 | |
| 976 | // Blur the image in each direction |
| 977 | ret_image = BlurHorizontal(blurRadius); |
| 978 | ret_image = ret_image.BlurVertical(blurRadius); |
| 979 | |
| 980 | return ret_image; |
| 981 | } |
| 982 | |
| 983 | wxImage wxImage::Rotate90( bool clockwise ) const |
| 984 | { |
| 985 | wxImage image; |
| 986 | |
| 987 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 988 | |
| 989 | image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false ); |
| 990 | |
| 991 | unsigned char *data = image.GetData(); |
| 992 | |
| 993 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 994 | |
| 995 | unsigned char *source_data = M_IMGDATA->m_data; |
| 996 | unsigned char *target_data; |
| 997 | unsigned char *alpha_data = 0 ; |
| 998 | unsigned char *source_alpha = 0 ; |
| 999 | unsigned char *target_alpha = 0 ; |
| 1000 | |
| 1001 | if (M_IMGDATA->m_hasMask) |
| 1002 | { |
| 1003 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); |
| 1004 | } |
| 1005 | else |
| 1006 | { |
| 1007 | source_alpha = M_IMGDATA->m_alpha ; |
| 1008 | if ( source_alpha ) |
| 1009 | { |
| 1010 | image.SetAlpha() ; |
| 1011 | alpha_data = image.GetAlpha() ; |
| 1012 | } |
| 1013 | } |
| 1014 | |
| 1015 | long height = M_IMGDATA->m_height; |
| 1016 | long width = M_IMGDATA->m_width; |
| 1017 | |
| 1018 | for (long j = 0; j < height; j++) |
| 1019 | { |
| 1020 | for (long i = 0; i < width; i++) |
| 1021 | { |
| 1022 | if (clockwise) |
| 1023 | { |
| 1024 | target_data = data + (((i+1)*height) - j - 1)*3; |
| 1025 | if(source_alpha) |
| 1026 | target_alpha = alpha_data + (((i+1)*height) - j - 1); |
| 1027 | } |
| 1028 | else |
| 1029 | { |
| 1030 | target_data = data + ((height*(width-1)) + j - (i*height))*3; |
| 1031 | if(source_alpha) |
| 1032 | target_alpha = alpha_data + ((height*(width-1)) + j - (i*height)); |
| 1033 | } |
| 1034 | memcpy( target_data, source_data, 3 ); |
| 1035 | source_data += 3; |
| 1036 | |
| 1037 | if(source_alpha) |
| 1038 | { |
| 1039 | memcpy( target_alpha, source_alpha, 1 ); |
| 1040 | source_alpha += 1; |
| 1041 | } |
| 1042 | } |
| 1043 | } |
| 1044 | |
| 1045 | return image; |
| 1046 | } |
| 1047 | |
| 1048 | wxImage wxImage::Mirror( bool horizontally ) const |
| 1049 | { |
| 1050 | wxImage image; |
| 1051 | |
| 1052 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 1053 | |
| 1054 | image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); |
| 1055 | |
| 1056 | unsigned char *data = image.GetData(); |
| 1057 | unsigned char *alpha = NULL; |
| 1058 | |
| 1059 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 1060 | |
| 1061 | if (M_IMGDATA->m_alpha != NULL) { |
| 1062 | image.SetAlpha(); |
| 1063 | alpha = image.GetAlpha(); |
| 1064 | wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") ); |
| 1065 | } |
| 1066 | |
| 1067 | if (M_IMGDATA->m_hasMask) |
| 1068 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); |
| 1069 | |
| 1070 | long height = M_IMGDATA->m_height; |
| 1071 | long width = M_IMGDATA->m_width; |
| 1072 | |
| 1073 | unsigned char *source_data = M_IMGDATA->m_data; |
| 1074 | unsigned char *target_data; |
| 1075 | |
| 1076 | if (horizontally) |
| 1077 | { |
| 1078 | for (long j = 0; j < height; j++) |
| 1079 | { |
| 1080 | data += width*3; |
| 1081 | target_data = data-3; |
| 1082 | for (long i = 0; i < width; i++) |
| 1083 | { |
| 1084 | memcpy( target_data, source_data, 3 ); |
| 1085 | source_data += 3; |
| 1086 | target_data -= 3; |
| 1087 | } |
| 1088 | } |
| 1089 | |
| 1090 | if (alpha != NULL) |
| 1091 | { |
| 1092 | // src_alpha starts at the first pixel and increases by 1 after each step |
| 1093 | // (a step here is the copy of the alpha value of one pixel) |
| 1094 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; |
| 1095 | // dest_alpha starts just beyond the first line, decreases before each step, |
| 1096 | // and after each line is finished, increases by 2 widths (skipping the line |
| 1097 | // just copied and the line that will be copied next) |
| 1098 | unsigned char *dest_alpha = alpha + width; |
| 1099 | |
| 1100 | for (long jj = 0; jj < height; ++jj) |
| 1101 | { |
| 1102 | for (long i = 0; i < width; ++i) { |
| 1103 | *(--dest_alpha) = *(src_alpha++); // copy one pixel |
| 1104 | } |
| 1105 | dest_alpha += 2 * width; // advance beyond the end of the next line |
| 1106 | } |
| 1107 | } |
| 1108 | } |
| 1109 | else |
| 1110 | { |
| 1111 | for (long i = 0; i < height; i++) |
| 1112 | { |
| 1113 | target_data = data + 3*width*(height-1-i); |
| 1114 | memcpy( target_data, source_data, (size_t)3*width ); |
| 1115 | source_data += 3*width; |
| 1116 | } |
| 1117 | |
| 1118 | if (alpha != NULL) |
| 1119 | { |
| 1120 | // src_alpha starts at the first pixel and increases by 1 width after each step |
| 1121 | // (a step here is the copy of the alpha channel of an entire line) |
| 1122 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; |
| 1123 | // dest_alpha starts just beyond the last line (beyond the whole image) |
| 1124 | // and decreases by 1 width before each step |
| 1125 | unsigned char *dest_alpha = alpha + width * height; |
| 1126 | |
| 1127 | for (long jj = 0; jj < height; ++jj) |
| 1128 | { |
| 1129 | dest_alpha -= width; |
| 1130 | memcpy( dest_alpha, src_alpha, (size_t)width ); |
| 1131 | src_alpha += width; |
| 1132 | } |
| 1133 | } |
| 1134 | } |
| 1135 | |
| 1136 | return image; |
| 1137 | } |
| 1138 | |
| 1139 | wxImage wxImage::GetSubImage( const wxRect &rect ) const |
| 1140 | { |
| 1141 | wxImage image; |
| 1142 | |
| 1143 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 1144 | |
| 1145 | wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && |
| 1146 | (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()), |
| 1147 | image, wxT("invalid subimage size") ); |
| 1148 | |
| 1149 | const int subwidth = rect.GetWidth(); |
| 1150 | const int subheight = rect.GetHeight(); |
| 1151 | |
| 1152 | image.Create( subwidth, subheight, false ); |
| 1153 | |
| 1154 | const unsigned char *src_data = GetData(); |
| 1155 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; |
| 1156 | unsigned char *subdata = image.GetData(); |
| 1157 | unsigned char *subalpha = NULL; |
| 1158 | |
| 1159 | wxCHECK_MSG( subdata, image, wxT("unable to create image") ); |
| 1160 | |
| 1161 | if (src_alpha != NULL) { |
| 1162 | image.SetAlpha(); |
| 1163 | subalpha = image.GetAlpha(); |
| 1164 | wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel")); |
| 1165 | } |
| 1166 | |
| 1167 | if (M_IMGDATA->m_hasMask) |
| 1168 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); |
| 1169 | |
| 1170 | const int width = GetWidth(); |
| 1171 | const int pixsoff = rect.GetLeft() + width * rect.GetTop(); |
| 1172 | |
| 1173 | src_data += 3 * pixsoff; |
| 1174 | src_alpha += pixsoff; // won't be used if was NULL, so this is ok |
| 1175 | |
| 1176 | for (long j = 0; j < subheight; ++j) |
| 1177 | { |
| 1178 | memcpy( subdata, src_data, 3 * subwidth ); |
| 1179 | subdata += 3 * subwidth; |
| 1180 | src_data += 3 * width; |
| 1181 | if (subalpha != NULL) { |
| 1182 | memcpy( subalpha, src_alpha, subwidth ); |
| 1183 | subalpha += subwidth; |
| 1184 | src_alpha += width; |
| 1185 | } |
| 1186 | } |
| 1187 | |
| 1188 | return image; |
| 1189 | } |
| 1190 | |
| 1191 | wxImage wxImage::Size( const wxSize& size, const wxPoint& pos, |
| 1192 | int r_, int g_, int b_ ) const |
| 1193 | { |
| 1194 | wxImage image; |
| 1195 | |
| 1196 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 1197 | wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") ); |
| 1198 | |
| 1199 | int width = GetWidth(), height = GetHeight(); |
| 1200 | image.Create(size.GetWidth(), size.GetHeight(), false); |
| 1201 | |
| 1202 | unsigned char r = (unsigned char)r_; |
| 1203 | unsigned char g = (unsigned char)g_; |
| 1204 | unsigned char b = (unsigned char)b_; |
| 1205 | if ((r_ == -1) && (g_ == -1) && (b_ == -1)) |
| 1206 | { |
| 1207 | GetOrFindMaskColour( &r, &g, &b ); |
| 1208 | image.SetMaskColour(r, g, b); |
| 1209 | } |
| 1210 | |
| 1211 | image.SetRGB(wxRect(), r, g, b); |
| 1212 | |
| 1213 | wxRect subRect(pos.x, pos.y, width, height); |
| 1214 | wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight()); |
| 1215 | if (pos.x < 0) |
| 1216 | finalRect.width -= pos.x; |
| 1217 | if (pos.y < 0) |
| 1218 | finalRect.height -= pos.y; |
| 1219 | |
| 1220 | subRect.Intersect(finalRect); |
| 1221 | |
| 1222 | if (!subRect.IsEmpty()) |
| 1223 | { |
| 1224 | if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height)) |
| 1225 | image.Paste(*this, pos.x, pos.y); |
| 1226 | else |
| 1227 | image.Paste(GetSubImage(subRect), pos.x, pos.y); |
| 1228 | } |
| 1229 | |
| 1230 | return image; |
| 1231 | } |
| 1232 | |
| 1233 | void wxImage::Paste( const wxImage &image, int x, int y ) |
| 1234 | { |
| 1235 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1236 | wxCHECK_RET( image.Ok(), wxT("invalid image") ); |
| 1237 | |
| 1238 | AllocExclusive(); |
| 1239 | |
| 1240 | int xx = 0; |
| 1241 | int yy = 0; |
| 1242 | int width = image.GetWidth(); |
| 1243 | int height = image.GetHeight(); |
| 1244 | |
| 1245 | if (x < 0) |
| 1246 | { |
| 1247 | xx = -x; |
| 1248 | width += x; |
| 1249 | } |
| 1250 | if (y < 0) |
| 1251 | { |
| 1252 | yy = -y; |
| 1253 | height += y; |
| 1254 | } |
| 1255 | |
| 1256 | if ((x+xx)+width > M_IMGDATA->m_width) |
| 1257 | width = M_IMGDATA->m_width - (x+xx); |
| 1258 | if ((y+yy)+height > M_IMGDATA->m_height) |
| 1259 | height = M_IMGDATA->m_height - (y+yy); |
| 1260 | |
| 1261 | if (width < 1) return; |
| 1262 | if (height < 1) return; |
| 1263 | |
| 1264 | if ((!HasMask() && !image.HasMask()) || |
| 1265 | (HasMask() && !image.HasMask()) || |
| 1266 | ((HasMask() && image.HasMask() && |
| 1267 | (GetMaskRed()==image.GetMaskRed()) && |
| 1268 | (GetMaskGreen()==image.GetMaskGreen()) && |
| 1269 | (GetMaskBlue()==image.GetMaskBlue())))) |
| 1270 | { |
| 1271 | width *= 3; |
| 1272 | unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); |
| 1273 | int source_step = image.GetWidth()*3; |
| 1274 | |
| 1275 | unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; |
| 1276 | int target_step = M_IMGDATA->m_width*3; |
| 1277 | for (int j = 0; j < height; j++) |
| 1278 | { |
| 1279 | memcpy( target_data, source_data, width ); |
| 1280 | source_data += source_step; |
| 1281 | target_data += target_step; |
| 1282 | } |
| 1283 | return; |
| 1284 | } |
| 1285 | |
| 1286 | // Copy over the alpha channel from the original image |
| 1287 | if ( image.HasAlpha() ) |
| 1288 | { |
| 1289 | if ( !HasAlpha() ) |
| 1290 | InitAlpha(); |
| 1291 | |
| 1292 | unsigned char* source_data = image.GetAlpha() + xx + yy*image.GetWidth(); |
| 1293 | int source_step = image.GetWidth(); |
| 1294 | |
| 1295 | unsigned char* target_data = GetAlpha() + (x+xx) + (y+yy)*M_IMGDATA->m_width; |
| 1296 | int target_step = M_IMGDATA->m_width; |
| 1297 | |
| 1298 | for (int j = 0; j < height; j++, |
| 1299 | source_data += source_step, |
| 1300 | target_data += target_step) |
| 1301 | { |
| 1302 | memcpy( target_data, source_data, width ); |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | if (!HasMask() && image.HasMask()) |
| 1307 | { |
| 1308 | unsigned char r = image.GetMaskRed(); |
| 1309 | unsigned char g = image.GetMaskGreen(); |
| 1310 | unsigned char b = image.GetMaskBlue(); |
| 1311 | |
| 1312 | width *= 3; |
| 1313 | unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); |
| 1314 | int source_step = image.GetWidth()*3; |
| 1315 | |
| 1316 | unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; |
| 1317 | int target_step = M_IMGDATA->m_width*3; |
| 1318 | |
| 1319 | for (int j = 0; j < height; j++) |
| 1320 | { |
| 1321 | for (int i = 0; i < width; i+=3) |
| 1322 | { |
| 1323 | if ((source_data[i] != r) || |
| 1324 | (source_data[i+1] != g) || |
| 1325 | (source_data[i+2] != b)) |
| 1326 | { |
| 1327 | memcpy( target_data+i, source_data+i, 3 ); |
| 1328 | } |
| 1329 | } |
| 1330 | source_data += source_step; |
| 1331 | target_data += target_step; |
| 1332 | } |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1, |
| 1337 | unsigned char r2, unsigned char g2, unsigned char b2 ) |
| 1338 | { |
| 1339 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1340 | |
| 1341 | AllocExclusive(); |
| 1342 | |
| 1343 | unsigned char *data = GetData(); |
| 1344 | |
| 1345 | const int w = GetWidth(); |
| 1346 | const int h = GetHeight(); |
| 1347 | |
| 1348 | for (int j = 0; j < h; j++) |
| 1349 | for (int i = 0; i < w; i++) |
| 1350 | { |
| 1351 | if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1)) |
| 1352 | { |
| 1353 | data[0] = r2; |
| 1354 | data[1] = g2; |
| 1355 | data[2] = b2; |
| 1356 | } |
| 1357 | data += 3; |
| 1358 | } |
| 1359 | } |
| 1360 | |
| 1361 | wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const |
| 1362 | { |
| 1363 | wxImage image; |
| 1364 | |
| 1365 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 1366 | |
| 1367 | image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); |
| 1368 | |
| 1369 | unsigned char *dest = image.GetData(); |
| 1370 | |
| 1371 | wxCHECK_MSG( dest, image, wxT("unable to create image") ); |
| 1372 | |
| 1373 | unsigned char *src = M_IMGDATA->m_data; |
| 1374 | bool hasMask = M_IMGDATA->m_hasMask; |
| 1375 | unsigned char maskRed = M_IMGDATA->m_maskRed; |
| 1376 | unsigned char maskGreen = M_IMGDATA->m_maskGreen; |
| 1377 | unsigned char maskBlue = M_IMGDATA->m_maskBlue; |
| 1378 | |
| 1379 | if ( hasMask ) |
| 1380 | image.SetMaskColour(maskRed, maskGreen, maskBlue); |
| 1381 | |
| 1382 | const long size = M_IMGDATA->m_width * M_IMGDATA->m_height; |
| 1383 | for ( long i = 0; i < size; i++, src += 3, dest += 3 ) |
| 1384 | { |
| 1385 | // don't modify the mask |
| 1386 | if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue ) |
| 1387 | { |
| 1388 | memcpy(dest, src, 3); |
| 1389 | } |
| 1390 | else |
| 1391 | { |
| 1392 | // calculate the luma |
| 1393 | double luma = (src[0] * lr + src[1] * lg + src[2] * lb) + 0.5; |
| 1394 | dest[0] = dest[1] = dest[2] = wx_static_cast(unsigned char, luma); |
| 1395 | } |
| 1396 | } |
| 1397 | |
| 1398 | // copy the alpha channel, if any |
| 1399 | if (HasAlpha()) |
| 1400 | { |
| 1401 | const size_t alphaSize = GetWidth() * GetHeight(); |
| 1402 | unsigned char *alpha = (unsigned char*)malloc(alphaSize); |
| 1403 | memcpy(alpha, GetAlpha(), alphaSize); |
| 1404 | image.InitAlpha(); |
| 1405 | image.SetAlpha(alpha); |
| 1406 | } |
| 1407 | |
| 1408 | return image; |
| 1409 | } |
| 1410 | |
| 1411 | wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const |
| 1412 | { |
| 1413 | wxImage image; |
| 1414 | |
| 1415 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 1416 | |
| 1417 | image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); |
| 1418 | |
| 1419 | unsigned char *data = image.GetData(); |
| 1420 | |
| 1421 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 1422 | |
| 1423 | if (M_IMGDATA->m_hasMask) |
| 1424 | { |
| 1425 | if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g && |
| 1426 | M_IMGDATA->m_maskBlue == b) |
| 1427 | image.SetMaskColour( 255, 255, 255 ); |
| 1428 | else |
| 1429 | image.SetMaskColour( 0, 0, 0 ); |
| 1430 | } |
| 1431 | |
| 1432 | long size = M_IMGDATA->m_height * M_IMGDATA->m_width; |
| 1433 | |
| 1434 | unsigned char *srcd = M_IMGDATA->m_data; |
| 1435 | unsigned char *tard = image.GetData(); |
| 1436 | |
| 1437 | for ( long i = 0; i < size; i++, srcd += 3, tard += 3 ) |
| 1438 | { |
| 1439 | if (srcd[0] == r && srcd[1] == g && srcd[2] == b) |
| 1440 | tard[0] = tard[1] = tard[2] = 255; |
| 1441 | else |
| 1442 | tard[0] = tard[1] = tard[2] = 0; |
| 1443 | } |
| 1444 | |
| 1445 | return image; |
| 1446 | } |
| 1447 | |
| 1448 | int wxImage::GetWidth() const |
| 1449 | { |
| 1450 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 1451 | |
| 1452 | return M_IMGDATA->m_width; |
| 1453 | } |
| 1454 | |
| 1455 | int wxImage::GetHeight() const |
| 1456 | { |
| 1457 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 1458 | |
| 1459 | return M_IMGDATA->m_height; |
| 1460 | } |
| 1461 | |
| 1462 | long wxImage::XYToIndex(int x, int y) const |
| 1463 | { |
| 1464 | if ( Ok() && |
| 1465 | x >= 0 && y >= 0 && |
| 1466 | x < M_IMGDATA->m_width && y < M_IMGDATA->m_height ) |
| 1467 | { |
| 1468 | return y*M_IMGDATA->m_width + x; |
| 1469 | } |
| 1470 | |
| 1471 | return -1; |
| 1472 | } |
| 1473 | |
| 1474 | void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) |
| 1475 | { |
| 1476 | long pos = XYToIndex(x, y); |
| 1477 | wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); |
| 1478 | |
| 1479 | AllocExclusive(); |
| 1480 | |
| 1481 | pos *= 3; |
| 1482 | |
| 1483 | M_IMGDATA->m_data[ pos ] = r; |
| 1484 | M_IMGDATA->m_data[ pos+1 ] = g; |
| 1485 | M_IMGDATA->m_data[ pos+2 ] = b; |
| 1486 | } |
| 1487 | |
| 1488 | void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b ) |
| 1489 | { |
| 1490 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1491 | |
| 1492 | AllocExclusive(); |
| 1493 | |
| 1494 | wxRect rect(rect_); |
| 1495 | wxRect imageRect(0, 0, GetWidth(), GetHeight()); |
| 1496 | if ( rect == wxRect() ) |
| 1497 | { |
| 1498 | rect = imageRect; |
| 1499 | } |
| 1500 | else |
| 1501 | { |
| 1502 | wxCHECK_RET( imageRect.Contains(rect.GetTopLeft()) && |
| 1503 | imageRect.Contains(rect.GetBottomRight()), |
| 1504 | wxT("invalid bounding rectangle") ); |
| 1505 | } |
| 1506 | |
| 1507 | int x1 = rect.GetLeft(), |
| 1508 | y1 = rect.GetTop(), |
| 1509 | x2 = rect.GetRight() + 1, |
| 1510 | y2 = rect.GetBottom() + 1; |
| 1511 | |
| 1512 | unsigned char *data wxDUMMY_INITIALIZE(NULL); |
| 1513 | int x, y, width = GetWidth(); |
| 1514 | for (y = y1; y < y2; y++) |
| 1515 | { |
| 1516 | data = M_IMGDATA->m_data + (y*width + x1)*3; |
| 1517 | for (x = x1; x < x2; x++) |
| 1518 | { |
| 1519 | *data++ = r; |
| 1520 | *data++ = g; |
| 1521 | *data++ = b; |
| 1522 | } |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | unsigned char wxImage::GetRed( int x, int y ) const |
| 1527 | { |
| 1528 | long pos = XYToIndex(x, y); |
| 1529 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); |
| 1530 | |
| 1531 | pos *= 3; |
| 1532 | |
| 1533 | return M_IMGDATA->m_data[pos]; |
| 1534 | } |
| 1535 | |
| 1536 | unsigned char wxImage::GetGreen( int x, int y ) const |
| 1537 | { |
| 1538 | long pos = XYToIndex(x, y); |
| 1539 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); |
| 1540 | |
| 1541 | pos *= 3; |
| 1542 | |
| 1543 | return M_IMGDATA->m_data[pos+1]; |
| 1544 | } |
| 1545 | |
| 1546 | unsigned char wxImage::GetBlue( int x, int y ) const |
| 1547 | { |
| 1548 | long pos = XYToIndex(x, y); |
| 1549 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); |
| 1550 | |
| 1551 | pos *= 3; |
| 1552 | |
| 1553 | return M_IMGDATA->m_data[pos+2]; |
| 1554 | } |
| 1555 | |
| 1556 | bool wxImage::IsOk() const |
| 1557 | { |
| 1558 | // image of 0 width or height can't be considered ok - at least because it |
| 1559 | // causes crashes in ConvertToBitmap() if we don't catch it in time |
| 1560 | wxImageRefData *data = M_IMGDATA; |
| 1561 | return data && data->m_ok && data->m_width && data->m_height; |
| 1562 | } |
| 1563 | |
| 1564 | unsigned char *wxImage::GetData() const |
| 1565 | { |
| 1566 | wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); |
| 1567 | |
| 1568 | return M_IMGDATA->m_data; |
| 1569 | } |
| 1570 | |
| 1571 | void wxImage::SetData( unsigned char *data, bool static_data ) |
| 1572 | { |
| 1573 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1574 | |
| 1575 | wxImageRefData *newRefData = new wxImageRefData(); |
| 1576 | |
| 1577 | newRefData->m_width = M_IMGDATA->m_width; |
| 1578 | newRefData->m_height = M_IMGDATA->m_height; |
| 1579 | newRefData->m_data = data; |
| 1580 | newRefData->m_ok = true; |
| 1581 | newRefData->m_maskRed = M_IMGDATA->m_maskRed; |
| 1582 | newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; |
| 1583 | newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; |
| 1584 | newRefData->m_hasMask = M_IMGDATA->m_hasMask; |
| 1585 | newRefData->m_static = static_data; |
| 1586 | |
| 1587 | UnRef(); |
| 1588 | |
| 1589 | m_refData = newRefData; |
| 1590 | } |
| 1591 | |
| 1592 | void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data ) |
| 1593 | { |
| 1594 | wxImageRefData *newRefData = new wxImageRefData(); |
| 1595 | |
| 1596 | if (m_refData) |
| 1597 | { |
| 1598 | newRefData->m_width = new_width; |
| 1599 | newRefData->m_height = new_height; |
| 1600 | newRefData->m_data = data; |
| 1601 | newRefData->m_ok = true; |
| 1602 | newRefData->m_maskRed = M_IMGDATA->m_maskRed; |
| 1603 | newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; |
| 1604 | newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; |
| 1605 | newRefData->m_hasMask = M_IMGDATA->m_hasMask; |
| 1606 | } |
| 1607 | else |
| 1608 | { |
| 1609 | newRefData->m_width = new_width; |
| 1610 | newRefData->m_height = new_height; |
| 1611 | newRefData->m_data = data; |
| 1612 | newRefData->m_ok = true; |
| 1613 | } |
| 1614 | newRefData->m_static = static_data; |
| 1615 | |
| 1616 | UnRef(); |
| 1617 | |
| 1618 | m_refData = newRefData; |
| 1619 | } |
| 1620 | |
| 1621 | // ---------------------------------------------------------------------------- |
| 1622 | // alpha channel support |
| 1623 | // ---------------------------------------------------------------------------- |
| 1624 | |
| 1625 | void wxImage::SetAlpha(int x, int y, unsigned char alpha) |
| 1626 | { |
| 1627 | wxCHECK_RET( HasAlpha(), wxT("no alpha channel") ); |
| 1628 | |
| 1629 | long pos = XYToIndex(x, y); |
| 1630 | wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); |
| 1631 | |
| 1632 | AllocExclusive(); |
| 1633 | |
| 1634 | M_IMGDATA->m_alpha[pos] = alpha; |
| 1635 | } |
| 1636 | |
| 1637 | unsigned char wxImage::GetAlpha(int x, int y) const |
| 1638 | { |
| 1639 | wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") ); |
| 1640 | |
| 1641 | long pos = XYToIndex(x, y); |
| 1642 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); |
| 1643 | |
| 1644 | return M_IMGDATA->m_alpha[pos]; |
| 1645 | } |
| 1646 | |
| 1647 | bool |
| 1648 | wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b) |
| 1649 | { |
| 1650 | SetAlpha(NULL); |
| 1651 | |
| 1652 | const int w = M_IMGDATA->m_width; |
| 1653 | const int h = M_IMGDATA->m_height; |
| 1654 | |
| 1655 | unsigned char *alpha = GetAlpha(); |
| 1656 | unsigned char *data = GetData(); |
| 1657 | |
| 1658 | for ( int y = 0; y < h; y++ ) |
| 1659 | { |
| 1660 | for ( int x = 0; x < w; x++ ) |
| 1661 | { |
| 1662 | *alpha++ = *data; |
| 1663 | *data++ = r; |
| 1664 | *data++ = g; |
| 1665 | *data++ = b; |
| 1666 | } |
| 1667 | } |
| 1668 | |
| 1669 | return true; |
| 1670 | } |
| 1671 | |
| 1672 | void wxImage::SetAlpha( unsigned char *alpha, bool static_data ) |
| 1673 | { |
| 1674 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1675 | |
| 1676 | AllocExclusive(); |
| 1677 | |
| 1678 | if ( !alpha ) |
| 1679 | { |
| 1680 | alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height); |
| 1681 | } |
| 1682 | |
| 1683 | if( !M_IMGDATA->m_staticAlpha ) |
| 1684 | free(M_IMGDATA->m_alpha); |
| 1685 | |
| 1686 | M_IMGDATA->m_alpha = alpha; |
| 1687 | M_IMGDATA->m_staticAlpha = static_data; |
| 1688 | } |
| 1689 | |
| 1690 | unsigned char *wxImage::GetAlpha() const |
| 1691 | { |
| 1692 | wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); |
| 1693 | |
| 1694 | return M_IMGDATA->m_alpha; |
| 1695 | } |
| 1696 | |
| 1697 | void wxImage::InitAlpha() |
| 1698 | { |
| 1699 | wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") ); |
| 1700 | |
| 1701 | // initialize memory for alpha channel |
| 1702 | SetAlpha(); |
| 1703 | |
| 1704 | unsigned char *alpha = M_IMGDATA->m_alpha; |
| 1705 | const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height; |
| 1706 | |
| 1707 | if ( HasMask() ) |
| 1708 | { |
| 1709 | // use the mask to initialize the alpha channel. |
| 1710 | const unsigned char * const alphaEnd = alpha + lenAlpha; |
| 1711 | |
| 1712 | const unsigned char mr = M_IMGDATA->m_maskRed; |
| 1713 | const unsigned char mg = M_IMGDATA->m_maskGreen; |
| 1714 | const unsigned char mb = M_IMGDATA->m_maskBlue; |
| 1715 | for ( unsigned char *src = M_IMGDATA->m_data; |
| 1716 | alpha < alphaEnd; |
| 1717 | src += 3, alpha++ ) |
| 1718 | { |
| 1719 | *alpha = (src[0] == mr && src[1] == mg && src[2] == mb) |
| 1720 | ? wxIMAGE_ALPHA_TRANSPARENT |
| 1721 | : wxIMAGE_ALPHA_OPAQUE; |
| 1722 | } |
| 1723 | |
| 1724 | M_IMGDATA->m_hasMask = false; |
| 1725 | } |
| 1726 | else // no mask |
| 1727 | { |
| 1728 | // make the image fully opaque |
| 1729 | memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha); |
| 1730 | } |
| 1731 | } |
| 1732 | |
| 1733 | // ---------------------------------------------------------------------------- |
| 1734 | // mask support |
| 1735 | // ---------------------------------------------------------------------------- |
| 1736 | |
| 1737 | void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) |
| 1738 | { |
| 1739 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1740 | |
| 1741 | AllocExclusive(); |
| 1742 | |
| 1743 | M_IMGDATA->m_maskRed = r; |
| 1744 | M_IMGDATA->m_maskGreen = g; |
| 1745 | M_IMGDATA->m_maskBlue = b; |
| 1746 | M_IMGDATA->m_hasMask = true; |
| 1747 | } |
| 1748 | |
| 1749 | bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const |
| 1750 | { |
| 1751 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1752 | |
| 1753 | if (M_IMGDATA->m_hasMask) |
| 1754 | { |
| 1755 | if (r) *r = M_IMGDATA->m_maskRed; |
| 1756 | if (g) *g = M_IMGDATA->m_maskGreen; |
| 1757 | if (b) *b = M_IMGDATA->m_maskBlue; |
| 1758 | return true; |
| 1759 | } |
| 1760 | else |
| 1761 | { |
| 1762 | FindFirstUnusedColour(r, g, b); |
| 1763 | return false; |
| 1764 | } |
| 1765 | } |
| 1766 | |
| 1767 | unsigned char wxImage::GetMaskRed() const |
| 1768 | { |
| 1769 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 1770 | |
| 1771 | return M_IMGDATA->m_maskRed; |
| 1772 | } |
| 1773 | |
| 1774 | unsigned char wxImage::GetMaskGreen() const |
| 1775 | { |
| 1776 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 1777 | |
| 1778 | return M_IMGDATA->m_maskGreen; |
| 1779 | } |
| 1780 | |
| 1781 | unsigned char wxImage::GetMaskBlue() const |
| 1782 | { |
| 1783 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 1784 | |
| 1785 | return M_IMGDATA->m_maskBlue; |
| 1786 | } |
| 1787 | |
| 1788 | void wxImage::SetMask( bool mask ) |
| 1789 | { |
| 1790 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1791 | |
| 1792 | AllocExclusive(); |
| 1793 | |
| 1794 | M_IMGDATA->m_hasMask = mask; |
| 1795 | } |
| 1796 | |
| 1797 | bool wxImage::HasMask() const |
| 1798 | { |
| 1799 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1800 | |
| 1801 | return M_IMGDATA->m_hasMask; |
| 1802 | } |
| 1803 | |
| 1804 | bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const |
| 1805 | { |
| 1806 | long pos = XYToIndex(x, y); |
| 1807 | wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") ); |
| 1808 | |
| 1809 | // check mask |
| 1810 | if ( M_IMGDATA->m_hasMask ) |
| 1811 | { |
| 1812 | const unsigned char *p = M_IMGDATA->m_data + 3*pos; |
| 1813 | if ( p[0] == M_IMGDATA->m_maskRed && |
| 1814 | p[1] == M_IMGDATA->m_maskGreen && |
| 1815 | p[2] == M_IMGDATA->m_maskBlue ) |
| 1816 | { |
| 1817 | return true; |
| 1818 | } |
| 1819 | } |
| 1820 | |
| 1821 | // then check alpha |
| 1822 | if ( M_IMGDATA->m_alpha ) |
| 1823 | { |
| 1824 | if ( M_IMGDATA->m_alpha[pos] < threshold ) |
| 1825 | { |
| 1826 | // transparent enough |
| 1827 | return true; |
| 1828 | } |
| 1829 | } |
| 1830 | |
| 1831 | // not transparent |
| 1832 | return false; |
| 1833 | } |
| 1834 | |
| 1835 | bool wxImage::SetMaskFromImage(const wxImage& mask, |
| 1836 | unsigned char mr, unsigned char mg, unsigned char mb) |
| 1837 | { |
| 1838 | // check that the images are the same size |
| 1839 | if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) ) |
| 1840 | { |
| 1841 | wxLogError( _("Image and mask have different sizes.") ); |
| 1842 | return false; |
| 1843 | } |
| 1844 | |
| 1845 | // find unused colour |
| 1846 | unsigned char r,g,b ; |
| 1847 | if (!FindFirstUnusedColour(&r, &g, &b)) |
| 1848 | { |
| 1849 | wxLogError( _("No unused colour in image being masked.") ); |
| 1850 | return false ; |
| 1851 | } |
| 1852 | |
| 1853 | AllocExclusive(); |
| 1854 | |
| 1855 | unsigned char *imgdata = GetData(); |
| 1856 | unsigned char *maskdata = mask.GetData(); |
| 1857 | |
| 1858 | const int w = GetWidth(); |
| 1859 | const int h = GetHeight(); |
| 1860 | |
| 1861 | for (int j = 0; j < h; j++) |
| 1862 | { |
| 1863 | for (int i = 0; i < w; i++) |
| 1864 | { |
| 1865 | if ((maskdata[0] == mr) && (maskdata[1] == mg) && (maskdata[2] == mb)) |
| 1866 | { |
| 1867 | imgdata[0] = r; |
| 1868 | imgdata[1] = g; |
| 1869 | imgdata[2] = b; |
| 1870 | } |
| 1871 | imgdata += 3; |
| 1872 | maskdata += 3; |
| 1873 | } |
| 1874 | } |
| 1875 | |
| 1876 | SetMaskColour(r, g, b); |
| 1877 | SetMask(true); |
| 1878 | |
| 1879 | return true; |
| 1880 | } |
| 1881 | |
| 1882 | bool wxImage::ConvertAlphaToMask(unsigned char threshold) |
| 1883 | { |
| 1884 | if (!HasAlpha()) |
| 1885 | return true; |
| 1886 | |
| 1887 | unsigned char mr, mg, mb; |
| 1888 | if (!FindFirstUnusedColour(&mr, &mg, &mb)) |
| 1889 | { |
| 1890 | wxLogError( _("No unused colour in image being masked.") ); |
| 1891 | return false; |
| 1892 | } |
| 1893 | |
| 1894 | AllocExclusive(); |
| 1895 | |
| 1896 | SetMask(true); |
| 1897 | SetMaskColour(mr, mg, mb); |
| 1898 | |
| 1899 | unsigned char *imgdata = GetData(); |
| 1900 | unsigned char *alphadata = GetAlpha(); |
| 1901 | |
| 1902 | int w = GetWidth(); |
| 1903 | int h = GetHeight(); |
| 1904 | |
| 1905 | for (int y = 0; y < h; y++) |
| 1906 | { |
| 1907 | for (int x = 0; x < w; x++, imgdata += 3, alphadata++) |
| 1908 | { |
| 1909 | if (*alphadata < threshold) |
| 1910 | { |
| 1911 | imgdata[0] = mr; |
| 1912 | imgdata[1] = mg; |
| 1913 | imgdata[2] = mb; |
| 1914 | } |
| 1915 | } |
| 1916 | } |
| 1917 | |
| 1918 | if( !M_IMGDATA->m_staticAlpha ) |
| 1919 | free(M_IMGDATA->m_alpha); |
| 1920 | |
| 1921 | M_IMGDATA->m_alpha = NULL; |
| 1922 | M_IMGDATA->m_staticAlpha = false; |
| 1923 | |
| 1924 | return true; |
| 1925 | } |
| 1926 | |
| 1927 | // ---------------------------------------------------------------------------- |
| 1928 | // Palette functions |
| 1929 | // ---------------------------------------------------------------------------- |
| 1930 | |
| 1931 | #if wxUSE_PALETTE |
| 1932 | |
| 1933 | bool wxImage::HasPalette() const |
| 1934 | { |
| 1935 | if (!Ok()) |
| 1936 | return false; |
| 1937 | |
| 1938 | return M_IMGDATA->m_palette.Ok(); |
| 1939 | } |
| 1940 | |
| 1941 | const wxPalette& wxImage::GetPalette() const |
| 1942 | { |
| 1943 | wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") ); |
| 1944 | |
| 1945 | return M_IMGDATA->m_palette; |
| 1946 | } |
| 1947 | |
| 1948 | void wxImage::SetPalette(const wxPalette& palette) |
| 1949 | { |
| 1950 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1951 | |
| 1952 | AllocExclusive(); |
| 1953 | |
| 1954 | M_IMGDATA->m_palette = palette; |
| 1955 | } |
| 1956 | |
| 1957 | #endif // wxUSE_PALETTE |
| 1958 | |
| 1959 | // ---------------------------------------------------------------------------- |
| 1960 | // Option functions (arbitrary name/value mapping) |
| 1961 | // ---------------------------------------------------------------------------- |
| 1962 | |
| 1963 | void wxImage::SetOption(const wxString& name, const wxString& value) |
| 1964 | { |
| 1965 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1966 | |
| 1967 | AllocExclusive(); |
| 1968 | |
| 1969 | int idx = M_IMGDATA->m_optionNames.Index(name, false); |
| 1970 | if (idx == wxNOT_FOUND) |
| 1971 | { |
| 1972 | M_IMGDATA->m_optionNames.Add(name); |
| 1973 | M_IMGDATA->m_optionValues.Add(value); |
| 1974 | } |
| 1975 | else |
| 1976 | { |
| 1977 | M_IMGDATA->m_optionNames[idx] = name; |
| 1978 | M_IMGDATA->m_optionValues[idx] = value; |
| 1979 | } |
| 1980 | } |
| 1981 | |
| 1982 | void wxImage::SetOption(const wxString& name, int value) |
| 1983 | { |
| 1984 | wxString valStr; |
| 1985 | valStr.Printf(wxT("%d"), value); |
| 1986 | SetOption(name, valStr); |
| 1987 | } |
| 1988 | |
| 1989 | wxString wxImage::GetOption(const wxString& name) const |
| 1990 | { |
| 1991 | wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") ); |
| 1992 | |
| 1993 | int idx = M_IMGDATA->m_optionNames.Index(name, false); |
| 1994 | if (idx == wxNOT_FOUND) |
| 1995 | return wxEmptyString; |
| 1996 | else |
| 1997 | return M_IMGDATA->m_optionValues[idx]; |
| 1998 | } |
| 1999 | |
| 2000 | int wxImage::GetOptionInt(const wxString& name) const |
| 2001 | { |
| 2002 | return wxAtoi(GetOption(name)); |
| 2003 | } |
| 2004 | |
| 2005 | bool wxImage::HasOption(const wxString& name) const |
| 2006 | { |
| 2007 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 2008 | |
| 2009 | return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND); |
| 2010 | } |
| 2011 | |
| 2012 | // ---------------------------------------------------------------------------- |
| 2013 | // image I/O |
| 2014 | // ---------------------------------------------------------------------------- |
| 2015 | |
| 2016 | bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), |
| 2017 | long WXUNUSED_UNLESS_STREAMS(type), |
| 2018 | int WXUNUSED_UNLESS_STREAMS(index) ) |
| 2019 | { |
| 2020 | #if HAS_FILE_STREAMS |
| 2021 | if (wxFileExists(filename)) |
| 2022 | { |
| 2023 | wxImageFileInputStream stream(filename); |
| 2024 | wxBufferedInputStream bstream( stream ); |
| 2025 | return LoadFile(bstream, type, index); |
| 2026 | } |
| 2027 | else |
| 2028 | { |
| 2029 | wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); |
| 2030 | |
| 2031 | return false; |
| 2032 | } |
| 2033 | #else // !HAS_FILE_STREAMS |
| 2034 | return false; |
| 2035 | #endif // HAS_FILE_STREAMS |
| 2036 | } |
| 2037 | |
| 2038 | bool wxImage::LoadFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), |
| 2039 | const wxString& WXUNUSED_UNLESS_STREAMS(mimetype), |
| 2040 | int WXUNUSED_UNLESS_STREAMS(index) ) |
| 2041 | { |
| 2042 | #if HAS_FILE_STREAMS |
| 2043 | if (wxFileExists(filename)) |
| 2044 | { |
| 2045 | wxImageFileInputStream stream(filename); |
| 2046 | wxBufferedInputStream bstream( stream ); |
| 2047 | return LoadFile(bstream, mimetype, index); |
| 2048 | } |
| 2049 | else |
| 2050 | { |
| 2051 | wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); |
| 2052 | |
| 2053 | return false; |
| 2054 | } |
| 2055 | #else // !HAS_FILE_STREAMS |
| 2056 | return false; |
| 2057 | #endif // HAS_FILE_STREAMS |
| 2058 | } |
| 2059 | |
| 2060 | |
| 2061 | |
| 2062 | bool wxImage::SaveFile( const wxString& filename ) const |
| 2063 | { |
| 2064 | wxString ext = filename.AfterLast('.').Lower(); |
| 2065 | |
| 2066 | wxImageHandler * pHandler = FindHandler(ext, -1); |
| 2067 | if (pHandler) |
| 2068 | { |
| 2069 | SaveFile(filename, pHandler->GetType()); |
| 2070 | return true; |
| 2071 | } |
| 2072 | |
| 2073 | wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str()); |
| 2074 | |
| 2075 | return false; |
| 2076 | } |
| 2077 | |
| 2078 | bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), |
| 2079 | int WXUNUSED_UNLESS_STREAMS(type) ) const |
| 2080 | { |
| 2081 | #if HAS_FILE_STREAMS |
| 2082 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 2083 | |
| 2084 | ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); |
| 2085 | |
| 2086 | wxImageFileOutputStream stream(filename); |
| 2087 | |
| 2088 | if ( stream.IsOk() ) |
| 2089 | { |
| 2090 | wxBufferedOutputStream bstream( stream ); |
| 2091 | return SaveFile(bstream, type); |
| 2092 | } |
| 2093 | #endif // HAS_FILE_STREAMS |
| 2094 | |
| 2095 | return false; |
| 2096 | } |
| 2097 | |
| 2098 | bool wxImage::SaveFile( const wxString& WXUNUSED_UNLESS_STREAMS(filename), |
| 2099 | const wxString& WXUNUSED_UNLESS_STREAMS(mimetype) ) const |
| 2100 | { |
| 2101 | #if HAS_FILE_STREAMS |
| 2102 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 2103 | |
| 2104 | ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); |
| 2105 | |
| 2106 | wxImageFileOutputStream stream(filename); |
| 2107 | |
| 2108 | if ( stream.IsOk() ) |
| 2109 | { |
| 2110 | wxBufferedOutputStream bstream( stream ); |
| 2111 | return SaveFile(bstream, mimetype); |
| 2112 | } |
| 2113 | #endif // HAS_FILE_STREAMS |
| 2114 | |
| 2115 | return false; |
| 2116 | } |
| 2117 | |
| 2118 | bool wxImage::CanRead( const wxString& WXUNUSED_UNLESS_STREAMS(name) ) |
| 2119 | { |
| 2120 | #if HAS_FILE_STREAMS |
| 2121 | wxImageFileInputStream stream(name); |
| 2122 | return CanRead(stream); |
| 2123 | #else |
| 2124 | return false; |
| 2125 | #endif |
| 2126 | } |
| 2127 | |
| 2128 | int wxImage::GetImageCount( const wxString& WXUNUSED_UNLESS_STREAMS(name), |
| 2129 | long WXUNUSED_UNLESS_STREAMS(type) ) |
| 2130 | { |
| 2131 | #if HAS_FILE_STREAMS |
| 2132 | wxImageFileInputStream stream(name); |
| 2133 | if (stream.Ok()) |
| 2134 | return GetImageCount(stream, type); |
| 2135 | #endif |
| 2136 | |
| 2137 | return 0; |
| 2138 | } |
| 2139 | |
| 2140 | #if wxUSE_STREAMS |
| 2141 | |
| 2142 | bool wxImage::CanRead( wxInputStream &stream ) |
| 2143 | { |
| 2144 | const wxList& list = GetHandlers(); |
| 2145 | |
| 2146 | for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) |
| 2147 | { |
| 2148 | wxImageHandler *handler=(wxImageHandler*)node->GetData(); |
| 2149 | if (handler->CanRead( stream )) |
| 2150 | return true; |
| 2151 | } |
| 2152 | |
| 2153 | return false; |
| 2154 | } |
| 2155 | |
| 2156 | int wxImage::GetImageCount( wxInputStream &stream, long type ) |
| 2157 | { |
| 2158 | wxImageHandler *handler; |
| 2159 | |
| 2160 | if ( type == wxBITMAP_TYPE_ANY ) |
| 2161 | { |
| 2162 | wxList &list=GetHandlers(); |
| 2163 | |
| 2164 | for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext()) |
| 2165 | { |
| 2166 | handler=(wxImageHandler*)node->GetData(); |
| 2167 | if ( handler->CanRead(stream) ) |
| 2168 | return handler->GetImageCount(stream); |
| 2169 | |
| 2170 | } |
| 2171 | |
| 2172 | wxLogWarning(_("No handler found for image type.")); |
| 2173 | return 0; |
| 2174 | } |
| 2175 | |
| 2176 | handler = FindHandler(type); |
| 2177 | |
| 2178 | if ( !handler ) |
| 2179 | { |
| 2180 | wxLogWarning(_("No image handler for type %ld defined."), type); |
| 2181 | return false; |
| 2182 | } |
| 2183 | |
| 2184 | if ( handler->CanRead(stream) ) |
| 2185 | { |
| 2186 | return handler->GetImageCount(stream); |
| 2187 | } |
| 2188 | else |
| 2189 | { |
| 2190 | wxLogError(_("Image file is not of type %ld."), type); |
| 2191 | return 0; |
| 2192 | } |
| 2193 | } |
| 2194 | |
| 2195 | bool wxImage::LoadFile( wxInputStream& stream, long type, int index ) |
| 2196 | { |
| 2197 | UnRef(); |
| 2198 | |
| 2199 | m_refData = new wxImageRefData; |
| 2200 | |
| 2201 | wxImageHandler *handler; |
| 2202 | |
| 2203 | if ( type == wxBITMAP_TYPE_ANY ) |
| 2204 | { |
| 2205 | wxList &list=GetHandlers(); |
| 2206 | |
| 2207 | for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) |
| 2208 | { |
| 2209 | handler=(wxImageHandler*)node->GetData(); |
| 2210 | if ( handler->CanRead(stream) ) |
| 2211 | return handler->LoadFile(this, stream, true/*verbose*/, index); |
| 2212 | |
| 2213 | } |
| 2214 | |
| 2215 | wxLogWarning( _("No handler found for image type.") ); |
| 2216 | return false; |
| 2217 | } |
| 2218 | |
| 2219 | handler = FindHandler(type); |
| 2220 | |
| 2221 | if (handler == 0) |
| 2222 | { |
| 2223 | wxLogWarning( _("No image handler for type %ld defined."), type ); |
| 2224 | |
| 2225 | return false; |
| 2226 | } |
| 2227 | |
| 2228 | if (stream.IsSeekable() && !handler->CanRead(stream)) |
| 2229 | { |
| 2230 | wxLogError(_("Image file is not of type %ld."), type); |
| 2231 | return false; |
| 2232 | } |
| 2233 | else |
| 2234 | return handler->LoadFile(this, stream, true/*verbose*/, index); |
| 2235 | } |
| 2236 | |
| 2237 | bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index ) |
| 2238 | { |
| 2239 | UnRef(); |
| 2240 | |
| 2241 | m_refData = new wxImageRefData; |
| 2242 | |
| 2243 | wxImageHandler *handler = FindHandlerMime(mimetype); |
| 2244 | |
| 2245 | if (handler == 0) |
| 2246 | { |
| 2247 | wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); |
| 2248 | |
| 2249 | return false; |
| 2250 | } |
| 2251 | |
| 2252 | if (stream.IsSeekable() && !handler->CanRead(stream)) |
| 2253 | { |
| 2254 | wxLogError(_("Image file is not of type %s."), mimetype); |
| 2255 | return false; |
| 2256 | } |
| 2257 | else |
| 2258 | return handler->LoadFile( this, stream, true/*verbose*/, index ); |
| 2259 | } |
| 2260 | |
| 2261 | bool wxImage::SaveFile( wxOutputStream& stream, int type ) const |
| 2262 | { |
| 2263 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 2264 | |
| 2265 | wxImageHandler *handler = FindHandler(type); |
| 2266 | if ( !handler ) |
| 2267 | { |
| 2268 | wxLogWarning( _("No image handler for type %d defined."), type ); |
| 2269 | |
| 2270 | return false; |
| 2271 | } |
| 2272 | |
| 2273 | return handler->SaveFile( (wxImage*)this, stream ); |
| 2274 | } |
| 2275 | |
| 2276 | bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const |
| 2277 | { |
| 2278 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 2279 | |
| 2280 | wxImageHandler *handler = FindHandlerMime(mimetype); |
| 2281 | if ( !handler ) |
| 2282 | { |
| 2283 | wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); |
| 2284 | |
| 2285 | return false; |
| 2286 | } |
| 2287 | |
| 2288 | return handler->SaveFile( (wxImage*)this, stream ); |
| 2289 | } |
| 2290 | #endif // wxUSE_STREAMS |
| 2291 | |
| 2292 | // ---------------------------------------------------------------------------- |
| 2293 | // image I/O handlers |
| 2294 | // ---------------------------------------------------------------------------- |
| 2295 | |
| 2296 | void wxImage::AddHandler( wxImageHandler *handler ) |
| 2297 | { |
| 2298 | // Check for an existing handler of the type being added. |
| 2299 | if (FindHandler( handler->GetType() ) == 0) |
| 2300 | { |
| 2301 | sm_handlers.Append( handler ); |
| 2302 | } |
| 2303 | else |
| 2304 | { |
| 2305 | // This is not documented behaviour, merely the simplest 'fix' |
| 2306 | // for preventing duplicate additions. If someone ever has |
| 2307 | // a good reason to add and remove duplicate handlers (and they |
| 2308 | // may) we should probably refcount the duplicates. |
| 2309 | // also an issue in InsertHandler below. |
| 2310 | |
| 2311 | wxLogDebug( _T("Adding duplicate image handler for '%s'"), |
| 2312 | handler->GetName().c_str() ); |
| 2313 | delete handler; |
| 2314 | } |
| 2315 | } |
| 2316 | |
| 2317 | void wxImage::InsertHandler( wxImageHandler *handler ) |
| 2318 | { |
| 2319 | // Check for an existing handler of the type being added. |
| 2320 | if (FindHandler( handler->GetType() ) == 0) |
| 2321 | { |
| 2322 | sm_handlers.Insert( handler ); |
| 2323 | } |
| 2324 | else |
| 2325 | { |
| 2326 | // see AddHandler for additional comments. |
| 2327 | wxLogDebug( _T("Inserting duplicate image handler for '%s'"), |
| 2328 | handler->GetName().c_str() ); |
| 2329 | delete handler; |
| 2330 | } |
| 2331 | } |
| 2332 | |
| 2333 | bool wxImage::RemoveHandler( const wxString& name ) |
| 2334 | { |
| 2335 | wxImageHandler *handler = FindHandler(name); |
| 2336 | if (handler) |
| 2337 | { |
| 2338 | sm_handlers.DeleteObject(handler); |
| 2339 | delete handler; |
| 2340 | return true; |
| 2341 | } |
| 2342 | else |
| 2343 | return false; |
| 2344 | } |
| 2345 | |
| 2346 | wxImageHandler *wxImage::FindHandler( const wxString& name ) |
| 2347 | { |
| 2348 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 2349 | while (node) |
| 2350 | { |
| 2351 | wxImageHandler *handler = (wxImageHandler*)node->GetData(); |
| 2352 | if (handler->GetName().Cmp(name) == 0) return handler; |
| 2353 | |
| 2354 | node = node->GetNext(); |
| 2355 | } |
| 2356 | return NULL; |
| 2357 | } |
| 2358 | |
| 2359 | wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType ) |
| 2360 | { |
| 2361 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 2362 | while (node) |
| 2363 | { |
| 2364 | wxImageHandler *handler = (wxImageHandler*)node->GetData(); |
| 2365 | if ( (handler->GetExtension().Cmp(extension) == 0) && |
| 2366 | (bitmapType == -1 || handler->GetType() == bitmapType) ) |
| 2367 | return handler; |
| 2368 | node = node->GetNext(); |
| 2369 | } |
| 2370 | return NULL; |
| 2371 | } |
| 2372 | |
| 2373 | wxImageHandler *wxImage::FindHandler( long bitmapType ) |
| 2374 | { |
| 2375 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 2376 | while (node) |
| 2377 | { |
| 2378 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); |
| 2379 | if (handler->GetType() == bitmapType) return handler; |
| 2380 | node = node->GetNext(); |
| 2381 | } |
| 2382 | return NULL; |
| 2383 | } |
| 2384 | |
| 2385 | wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) |
| 2386 | { |
| 2387 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 2388 | while (node) |
| 2389 | { |
| 2390 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); |
| 2391 | if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler; |
| 2392 | node = node->GetNext(); |
| 2393 | } |
| 2394 | return NULL; |
| 2395 | } |
| 2396 | |
| 2397 | void wxImage::InitStandardHandlers() |
| 2398 | { |
| 2399 | #if wxUSE_STREAMS |
| 2400 | AddHandler(new wxBMPHandler); |
| 2401 | #endif // wxUSE_STREAMS |
| 2402 | } |
| 2403 | |
| 2404 | void wxImage::CleanUpHandlers() |
| 2405 | { |
| 2406 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 2407 | while (node) |
| 2408 | { |
| 2409 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); |
| 2410 | wxList::compatibility_iterator next = node->GetNext(); |
| 2411 | delete handler; |
| 2412 | node = next; |
| 2413 | } |
| 2414 | |
| 2415 | sm_handlers.Clear(); |
| 2416 | } |
| 2417 | |
| 2418 | wxString wxImage::GetImageExtWildcard() |
| 2419 | { |
| 2420 | wxString fmts; |
| 2421 | |
| 2422 | wxList& Handlers = wxImage::GetHandlers(); |
| 2423 | wxList::compatibility_iterator Node = Handlers.GetFirst(); |
| 2424 | while ( Node ) |
| 2425 | { |
| 2426 | wxImageHandler* Handler = (wxImageHandler*)Node->GetData(); |
| 2427 | fmts += wxT("*.") + Handler->GetExtension(); |
| 2428 | Node = Node->GetNext(); |
| 2429 | if ( Node ) fmts += wxT(";"); |
| 2430 | } |
| 2431 | |
| 2432 | return wxT("(") + fmts + wxT(")|") + fmts; |
| 2433 | } |
| 2434 | |
| 2435 | wxImage::HSVValue wxImage::RGBtoHSV(const RGBValue& rgb) |
| 2436 | { |
| 2437 | const double red = rgb.red / 255.0, |
| 2438 | green = rgb.green / 255.0, |
| 2439 | blue = rgb.blue / 255.0; |
| 2440 | |
| 2441 | // find the min and max intensity (and remember which one was it for the |
| 2442 | // latter) |
| 2443 | double minimumRGB = red; |
| 2444 | if ( green < minimumRGB ) |
| 2445 | minimumRGB = green; |
| 2446 | if ( blue < minimumRGB ) |
| 2447 | minimumRGB = blue; |
| 2448 | |
| 2449 | enum { RED, GREEN, BLUE } chMax = RED; |
| 2450 | double maximumRGB = red; |
| 2451 | if ( green > maximumRGB ) |
| 2452 | { |
| 2453 | chMax = GREEN; |
| 2454 | maximumRGB = green; |
| 2455 | } |
| 2456 | if ( blue > maximumRGB ) |
| 2457 | { |
| 2458 | chMax = BLUE; |
| 2459 | maximumRGB = blue; |
| 2460 | } |
| 2461 | |
| 2462 | const double value = maximumRGB; |
| 2463 | |
| 2464 | double hue = 0.0, saturation; |
| 2465 | const double deltaRGB = maximumRGB - minimumRGB; |
| 2466 | if ( wxIsNullDouble(deltaRGB) ) |
| 2467 | { |
| 2468 | // Gray has no color |
| 2469 | hue = 0.0; |
| 2470 | saturation = 0.0; |
| 2471 | } |
| 2472 | else |
| 2473 | { |
| 2474 | switch ( chMax ) |
| 2475 | { |
| 2476 | case RED: |
| 2477 | hue = (green - blue) / deltaRGB; |
| 2478 | break; |
| 2479 | |
| 2480 | case GREEN: |
| 2481 | hue = 2.0 + (blue - red) / deltaRGB; |
| 2482 | break; |
| 2483 | |
| 2484 | case BLUE: |
| 2485 | hue = 4.0 + (red - green) / deltaRGB; |
| 2486 | break; |
| 2487 | |
| 2488 | default: |
| 2489 | wxFAIL_MSG(wxT("hue not specified")); |
| 2490 | break; |
| 2491 | } |
| 2492 | |
| 2493 | hue /= 6.0; |
| 2494 | |
| 2495 | if ( hue < 0.0 ) |
| 2496 | hue += 1.0; |
| 2497 | |
| 2498 | saturation = deltaRGB / maximumRGB; |
| 2499 | } |
| 2500 | |
| 2501 | return HSVValue(hue, saturation, value); |
| 2502 | } |
| 2503 | |
| 2504 | wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv) |
| 2505 | { |
| 2506 | double red, green, blue; |
| 2507 | |
| 2508 | if ( wxIsNullDouble(hsv.saturation) ) |
| 2509 | { |
| 2510 | // Grey |
| 2511 | red = hsv.value; |
| 2512 | green = hsv.value; |
| 2513 | blue = hsv.value; |
| 2514 | } |
| 2515 | else // not grey |
| 2516 | { |
| 2517 | double hue = hsv.hue * 6.0; // sector 0 to 5 |
| 2518 | int i = (int)floor(hue); |
| 2519 | double f = hue - i; // fractional part of h |
| 2520 | double p = hsv.value * (1.0 - hsv.saturation); |
| 2521 | |
| 2522 | switch (i) |
| 2523 | { |
| 2524 | case 0: |
| 2525 | red = hsv.value; |
| 2526 | green = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); |
| 2527 | blue = p; |
| 2528 | break; |
| 2529 | |
| 2530 | case 1: |
| 2531 | red = hsv.value * (1.0 - hsv.saturation * f); |
| 2532 | green = hsv.value; |
| 2533 | blue = p; |
| 2534 | break; |
| 2535 | |
| 2536 | case 2: |
| 2537 | red = p; |
| 2538 | green = hsv.value; |
| 2539 | blue = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); |
| 2540 | break; |
| 2541 | |
| 2542 | case 3: |
| 2543 | red = p; |
| 2544 | green = hsv.value * (1.0 - hsv.saturation * f); |
| 2545 | blue = hsv.value; |
| 2546 | break; |
| 2547 | |
| 2548 | case 4: |
| 2549 | red = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); |
| 2550 | green = p; |
| 2551 | blue = hsv.value; |
| 2552 | break; |
| 2553 | |
| 2554 | default: // case 5: |
| 2555 | red = hsv.value; |
| 2556 | green = p; |
| 2557 | blue = hsv.value * (1.0 - hsv.saturation * f); |
| 2558 | break; |
| 2559 | } |
| 2560 | } |
| 2561 | |
| 2562 | return RGBValue((unsigned char)(red * 255.0), |
| 2563 | (unsigned char)(green * 255.0), |
| 2564 | (unsigned char)(blue * 255.0)); |
| 2565 | } |
| 2566 | |
| 2567 | /* |
| 2568 | * Rotates the hue of each pixel of the image. angle is a double in the range |
| 2569 | * -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees |
| 2570 | */ |
| 2571 | void wxImage::RotateHue(double angle) |
| 2572 | { |
| 2573 | AllocExclusive(); |
| 2574 | |
| 2575 | unsigned char *srcBytePtr; |
| 2576 | unsigned char *dstBytePtr; |
| 2577 | unsigned long count; |
| 2578 | wxImage::HSVValue hsv; |
| 2579 | wxImage::RGBValue rgb; |
| 2580 | |
| 2581 | wxASSERT (angle >= -1.0 && angle <= 1.0); |
| 2582 | count = M_IMGDATA->m_width * M_IMGDATA->m_height; |
| 2583 | if ( count > 0 && !wxIsNullDouble(angle) ) |
| 2584 | { |
| 2585 | srcBytePtr = M_IMGDATA->m_data; |
| 2586 | dstBytePtr = srcBytePtr; |
| 2587 | do |
| 2588 | { |
| 2589 | rgb.red = *srcBytePtr++; |
| 2590 | rgb.green = *srcBytePtr++; |
| 2591 | rgb.blue = *srcBytePtr++; |
| 2592 | hsv = RGBtoHSV(rgb); |
| 2593 | |
| 2594 | hsv.hue = hsv.hue + angle; |
| 2595 | if (hsv.hue > 1.0) |
| 2596 | hsv.hue = hsv.hue - 1.0; |
| 2597 | else if (hsv.hue < 0.0) |
| 2598 | hsv.hue = hsv.hue + 1.0; |
| 2599 | |
| 2600 | rgb = HSVtoRGB(hsv); |
| 2601 | *dstBytePtr++ = rgb.red; |
| 2602 | *dstBytePtr++ = rgb.green; |
| 2603 | *dstBytePtr++ = rgb.blue; |
| 2604 | } while (--count != 0); |
| 2605 | } |
| 2606 | } |
| 2607 | |
| 2608 | //----------------------------------------------------------------------------- |
| 2609 | // wxImageHandler |
| 2610 | //----------------------------------------------------------------------------- |
| 2611 | |
| 2612 | IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject) |
| 2613 | |
| 2614 | #if wxUSE_STREAMS |
| 2615 | bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) ) |
| 2616 | { |
| 2617 | return false; |
| 2618 | } |
| 2619 | |
| 2620 | bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) ) |
| 2621 | { |
| 2622 | return false; |
| 2623 | } |
| 2624 | |
| 2625 | int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) ) |
| 2626 | { |
| 2627 | return 1; |
| 2628 | } |
| 2629 | |
| 2630 | bool wxImageHandler::CanRead( const wxString& name ) |
| 2631 | { |
| 2632 | if (wxFileExists(name)) |
| 2633 | { |
| 2634 | wxImageFileInputStream stream(name); |
| 2635 | return CanRead(stream); |
| 2636 | } |
| 2637 | |
| 2638 | wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() ); |
| 2639 | |
| 2640 | return false; |
| 2641 | } |
| 2642 | |
| 2643 | bool wxImageHandler::CallDoCanRead(wxInputStream& stream) |
| 2644 | { |
| 2645 | wxFileOffset posOld = stream.TellI(); |
| 2646 | if ( posOld == wxInvalidOffset ) |
| 2647 | { |
| 2648 | // can't test unseekable stream |
| 2649 | return false; |
| 2650 | } |
| 2651 | |
| 2652 | bool ok = DoCanRead(stream); |
| 2653 | |
| 2654 | // restore the old position to be able to test other formats and so on |
| 2655 | if ( stream.SeekI(posOld) == wxInvalidOffset ) |
| 2656 | { |
| 2657 | wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!")); |
| 2658 | |
| 2659 | // reading would fail anyhow as we're not at the right position |
| 2660 | return false; |
| 2661 | } |
| 2662 | |
| 2663 | return ok; |
| 2664 | } |
| 2665 | |
| 2666 | #endif // wxUSE_STREAMS |
| 2667 | |
| 2668 | /* static */ |
| 2669 | wxImageResolution |
| 2670 | wxImageHandler::GetResolutionFromOptions(const wxImage& image, int *x, int *y) |
| 2671 | { |
| 2672 | wxCHECK_MSG( x && y, wxIMAGE_RESOLUTION_NONE, _T("NULL pointer") ); |
| 2673 | |
| 2674 | if ( image.HasOption(wxIMAGE_OPTION_RESOLUTIONX) && |
| 2675 | image.HasOption(wxIMAGE_OPTION_RESOLUTIONY) ) |
| 2676 | { |
| 2677 | *x = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX); |
| 2678 | *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY); |
| 2679 | } |
| 2680 | else if ( image.HasOption(wxIMAGE_OPTION_RESOLUTION) ) |
| 2681 | { |
| 2682 | *x = |
| 2683 | *y = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTION); |
| 2684 | } |
| 2685 | else // no resolution options specified |
| 2686 | { |
| 2687 | *x = |
| 2688 | *y = 0; |
| 2689 | |
| 2690 | return wxIMAGE_RESOLUTION_NONE; |
| 2691 | } |
| 2692 | |
| 2693 | // get the resolution unit too |
| 2694 | int resUnit = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT); |
| 2695 | if ( !resUnit ) |
| 2696 | { |
| 2697 | // this is the default |
| 2698 | resUnit = wxIMAGE_RESOLUTION_INCHES; |
| 2699 | } |
| 2700 | |
| 2701 | return (wxImageResolution)resUnit; |
| 2702 | } |
| 2703 | |
| 2704 | // ---------------------------------------------------------------------------- |
| 2705 | // image histogram stuff |
| 2706 | // ---------------------------------------------------------------------------- |
| 2707 | |
| 2708 | bool |
| 2709 | wxImageHistogram::FindFirstUnusedColour(unsigned char *r, |
| 2710 | unsigned char *g, |
| 2711 | unsigned char *b, |
| 2712 | unsigned char r2, |
| 2713 | unsigned char b2, |
| 2714 | unsigned char g2) const |
| 2715 | { |
| 2716 | unsigned long key = MakeKey(r2, g2, b2); |
| 2717 | |
| 2718 | while ( find(key) != end() ) |
| 2719 | { |
| 2720 | // color already used |
| 2721 | r2++; |
| 2722 | if ( r2 >= 255 ) |
| 2723 | { |
| 2724 | r2 = 0; |
| 2725 | g2++; |
| 2726 | if ( g2 >= 255 ) |
| 2727 | { |
| 2728 | g2 = 0; |
| 2729 | b2++; |
| 2730 | if ( b2 >= 255 ) |
| 2731 | { |
| 2732 | wxLogError(_("No unused colour in image.") ); |
| 2733 | return false; |
| 2734 | } |
| 2735 | } |
| 2736 | } |
| 2737 | |
| 2738 | key = MakeKey(r2, g2, b2); |
| 2739 | } |
| 2740 | |
| 2741 | if ( r ) |
| 2742 | *r = r2; |
| 2743 | if ( g ) |
| 2744 | *g = g2; |
| 2745 | if ( b ) |
| 2746 | *b = b2; |
| 2747 | |
| 2748 | return true; |
| 2749 | } |
| 2750 | |
| 2751 | bool |
| 2752 | wxImage::FindFirstUnusedColour(unsigned char *r, |
| 2753 | unsigned char *g, |
| 2754 | unsigned char *b, |
| 2755 | unsigned char r2, |
| 2756 | unsigned char b2, |
| 2757 | unsigned char g2) const |
| 2758 | { |
| 2759 | wxImageHistogram histogram; |
| 2760 | |
| 2761 | ComputeHistogram(histogram); |
| 2762 | |
| 2763 | return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2); |
| 2764 | } |
| 2765 | |
| 2766 | |
| 2767 | |
| 2768 | // GRG, Dic/99 |
| 2769 | // Counts and returns the number of different colours. Optionally stops |
| 2770 | // when it exceeds 'stopafter' different colours. This is useful, for |
| 2771 | // example, to see if the image can be saved as 8-bit (256 colour or |
| 2772 | // less, in this case it would be invoked as CountColours(256)). Default |
| 2773 | // value for stopafter is -1 (don't care). |
| 2774 | // |
| 2775 | unsigned long wxImage::CountColours( unsigned long stopafter ) const |
| 2776 | { |
| 2777 | wxHashTable h; |
| 2778 | wxObject dummy; |
| 2779 | unsigned char r, g, b; |
| 2780 | unsigned char *p; |
| 2781 | unsigned long size, nentries, key; |
| 2782 | |
| 2783 | p = GetData(); |
| 2784 | size = GetWidth() * GetHeight(); |
| 2785 | nentries = 0; |
| 2786 | |
| 2787 | for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++) |
| 2788 | { |
| 2789 | r = *(p++); |
| 2790 | g = *(p++); |
| 2791 | b = *(p++); |
| 2792 | key = wxImageHistogram::MakeKey(r, g, b); |
| 2793 | |
| 2794 | if (h.Get(key) == NULL) |
| 2795 | { |
| 2796 | h.Put(key, &dummy); |
| 2797 | nentries++; |
| 2798 | } |
| 2799 | } |
| 2800 | |
| 2801 | return nentries; |
| 2802 | } |
| 2803 | |
| 2804 | |
| 2805 | unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const |
| 2806 | { |
| 2807 | unsigned char *p = GetData(); |
| 2808 | unsigned long nentries = 0; |
| 2809 | |
| 2810 | h.clear(); |
| 2811 | |
| 2812 | const unsigned long size = GetWidth() * GetHeight(); |
| 2813 | |
| 2814 | unsigned char r, g, b; |
| 2815 | for ( unsigned long n = 0; n < size; n++ ) |
| 2816 | { |
| 2817 | r = *p++; |
| 2818 | g = *p++; |
| 2819 | b = *p++; |
| 2820 | |
| 2821 | wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)]; |
| 2822 | |
| 2823 | if ( entry.value++ == 0 ) |
| 2824 | entry.index = nentries++; |
| 2825 | } |
| 2826 | |
| 2827 | return nentries; |
| 2828 | } |
| 2829 | |
| 2830 | /* |
| 2831 | * Rotation code by Carlos Moreno |
| 2832 | */ |
| 2833 | |
| 2834 | static const double wxROTATE_EPSILON = 1e-10; |
| 2835 | |
| 2836 | // Auxiliary function to rotate a point (x,y) with respect to point p0 |
| 2837 | // make it inline and use a straight return to facilitate optimization |
| 2838 | // also, the function receives the sine and cosine of the angle to avoid |
| 2839 | // repeating the time-consuming calls to these functions -- sin/cos can |
| 2840 | // be computed and stored in the calling function. |
| 2841 | |
| 2842 | static inline wxRealPoint |
| 2843 | wxRotatePoint(const wxRealPoint& p, double cos_angle, double sin_angle, |
| 2844 | const wxRealPoint& p0) |
| 2845 | { |
| 2846 | return wxRealPoint(p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle, |
| 2847 | p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle); |
| 2848 | } |
| 2849 | |
| 2850 | static inline wxRealPoint |
| 2851 | wxRotatePoint(double x, double y, double cos_angle, double sin_angle, |
| 2852 | const wxRealPoint & p0) |
| 2853 | { |
| 2854 | return wxRotatePoint (wxRealPoint(x,y), cos_angle, sin_angle, p0); |
| 2855 | } |
| 2856 | |
| 2857 | wxImage wxImage::Rotate(double angle, |
| 2858 | const wxPoint& centre_of_rotation, |
| 2859 | bool interpolating, |
| 2860 | wxPoint *offset_after_rotation) const |
| 2861 | { |
| 2862 | // screen coordinates are a mirror image of "real" coordinates |
| 2863 | angle = -angle; |
| 2864 | |
| 2865 | const bool has_alpha = HasAlpha(); |
| 2866 | |
| 2867 | const int w = GetWidth(); |
| 2868 | const int h = GetHeight(); |
| 2869 | |
| 2870 | int i; |
| 2871 | |
| 2872 | // Create pointer-based array to accelerate access to wxImage's data |
| 2873 | unsigned char ** data = new unsigned char * [h]; |
| 2874 | data[0] = GetData(); |
| 2875 | for (i = 1; i < h; i++) |
| 2876 | data[i] = data[i - 1] + (3 * w); |
| 2877 | |
| 2878 | // Same for alpha channel |
| 2879 | unsigned char ** alpha = NULL; |
| 2880 | if (has_alpha) |
| 2881 | { |
| 2882 | alpha = new unsigned char * [h]; |
| 2883 | alpha[0] = GetAlpha(); |
| 2884 | for (i = 1; i < h; i++) |
| 2885 | alpha[i] = alpha[i - 1] + w; |
| 2886 | } |
| 2887 | |
| 2888 | // precompute coefficients for rotation formula |
| 2889 | const double cos_angle = cos(angle); |
| 2890 | const double sin_angle = sin(angle); |
| 2891 | |
| 2892 | // Create new Image to store the result |
| 2893 | // First, find rectangle that covers the rotated image; to do that, |
| 2894 | // rotate the four corners |
| 2895 | |
| 2896 | const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y); |
| 2897 | |
| 2898 | wxRealPoint p1 = wxRotatePoint (0, 0, cos_angle, sin_angle, p0); |
| 2899 | wxRealPoint p2 = wxRotatePoint (0, h, cos_angle, sin_angle, p0); |
| 2900 | wxRealPoint p3 = wxRotatePoint (w, 0, cos_angle, sin_angle, p0); |
| 2901 | wxRealPoint p4 = wxRotatePoint (w, h, cos_angle, sin_angle, p0); |
| 2902 | |
| 2903 | int x1a = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x))); |
| 2904 | int y1a = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y))); |
| 2905 | int x2a = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x))); |
| 2906 | int y2a = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y))); |
| 2907 | |
| 2908 | // Create rotated image |
| 2909 | wxImage rotated (x2a - x1a + 1, y2a - y1a + 1, false); |
| 2910 | // With alpha channel |
| 2911 | if (has_alpha) |
| 2912 | rotated.SetAlpha(); |
| 2913 | |
| 2914 | if (offset_after_rotation != NULL) |
| 2915 | { |
| 2916 | *offset_after_rotation = wxPoint (x1a, y1a); |
| 2917 | } |
| 2918 | |
| 2919 | // the rotated (destination) image is always accessed sequentially via this |
| 2920 | // pointer, there is no need for pointer-based arrays here |
| 2921 | unsigned char *dst = rotated.GetData(); |
| 2922 | |
| 2923 | unsigned char *alpha_dst = has_alpha ? rotated.GetAlpha() : NULL; |
| 2924 | |
| 2925 | // if the original image has a mask, use its RGB values as the blank pixel, |
| 2926 | // else, fall back to default (black). |
| 2927 | unsigned char blank_r = 0; |
| 2928 | unsigned char blank_g = 0; |
| 2929 | unsigned char blank_b = 0; |
| 2930 | |
| 2931 | if (HasMask()) |
| 2932 | { |
| 2933 | blank_r = GetMaskRed(); |
| 2934 | blank_g = GetMaskGreen(); |
| 2935 | blank_b = GetMaskBlue(); |
| 2936 | rotated.SetMaskColour( blank_r, blank_g, blank_b ); |
| 2937 | } |
| 2938 | |
| 2939 | // Now, for each point of the rotated image, find where it came from, by |
| 2940 | // performing an inverse rotation (a rotation of -angle) and getting the |
| 2941 | // pixel at those coordinates |
| 2942 | |
| 2943 | const int rH = rotated.GetHeight(); |
| 2944 | const int rW = rotated.GetWidth(); |
| 2945 | |
| 2946 | // do the (interpolating) test outside of the loops, so that it is done |
| 2947 | // only once, instead of repeating it for each pixel. |
| 2948 | if (interpolating) |
| 2949 | { |
| 2950 | for (int y = 0; y < rH; y++) |
| 2951 | { |
| 2952 | for (int x = 0; x < rW; x++) |
| 2953 | { |
| 2954 | wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0); |
| 2955 | |
| 2956 | if (-0.25 < src.x && src.x < w - 0.75 && |
| 2957 | -0.25 < src.y && src.y < h - 0.75) |
| 2958 | { |
| 2959 | // interpolate using the 4 enclosing grid-points. Those |
| 2960 | // points can be obtained using floor and ceiling of the |
| 2961 | // exact coordinates of the point |
| 2962 | int x1, y1, x2, y2; |
| 2963 | |
| 2964 | if (0 < src.x && src.x < w - 1) |
| 2965 | { |
| 2966 | x1 = wxRound(floor(src.x)); |
| 2967 | x2 = wxRound(ceil(src.x)); |
| 2968 | } |
| 2969 | else // else means that x is near one of the borders (0 or width-1) |
| 2970 | { |
| 2971 | x1 = x2 = wxRound (src.x); |
| 2972 | } |
| 2973 | |
| 2974 | if (0 < src.y && src.y < h - 1) |
| 2975 | { |
| 2976 | y1 = wxRound(floor(src.y)); |
| 2977 | y2 = wxRound(ceil(src.y)); |
| 2978 | } |
| 2979 | else |
| 2980 | { |
| 2981 | y1 = y2 = wxRound (src.y); |
| 2982 | } |
| 2983 | |
| 2984 | // get four points and the distances (square of the distance, |
| 2985 | // for efficiency reasons) for the interpolation formula |
| 2986 | |
| 2987 | // GRG: Do not calculate the points until they are |
| 2988 | // really needed -- this way we can calculate |
| 2989 | // just one, instead of four, if d1, d2, d3 |
| 2990 | // or d4 are < wxROTATE_EPSILON |
| 2991 | |
| 2992 | const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1); |
| 2993 | const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1); |
| 2994 | const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2); |
| 2995 | const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2); |
| 2996 | |
| 2997 | // Now interpolate as a weighted average of the four surrounding |
| 2998 | // points, where the weights are the distances to each of those points |
| 2999 | |
| 3000 | // If the point is exactly at one point of the grid of the source |
| 3001 | // image, then don't interpolate -- just assign the pixel |
| 3002 | |
| 3003 | // d1,d2,d3,d4 are positive -- no need for abs() |
| 3004 | if (d1 < wxROTATE_EPSILON) |
| 3005 | { |
| 3006 | unsigned char *p = data[y1] + (3 * x1); |
| 3007 | *(dst++) = *(p++); |
| 3008 | *(dst++) = *(p++); |
| 3009 | *(dst++) = *p; |
| 3010 | |
| 3011 | if (has_alpha) |
| 3012 | *(alpha_dst++) = *(alpha[y1] + x1); |
| 3013 | } |
| 3014 | else if (d2 < wxROTATE_EPSILON) |
| 3015 | { |
| 3016 | unsigned char *p = data[y1] + (3 * x2); |
| 3017 | *(dst++) = *(p++); |
| 3018 | *(dst++) = *(p++); |
| 3019 | *(dst++) = *p; |
| 3020 | |
| 3021 | if (has_alpha) |
| 3022 | *(alpha_dst++) = *(alpha[y1] + x2); |
| 3023 | } |
| 3024 | else if (d3 < wxROTATE_EPSILON) |
| 3025 | { |
| 3026 | unsigned char *p = data[y2] + (3 * x2); |
| 3027 | *(dst++) = *(p++); |
| 3028 | *(dst++) = *(p++); |
| 3029 | *(dst++) = *p; |
| 3030 | |
| 3031 | if (has_alpha) |
| 3032 | *(alpha_dst++) = *(alpha[y2] + x2); |
| 3033 | } |
| 3034 | else if (d4 < wxROTATE_EPSILON) |
| 3035 | { |
| 3036 | unsigned char *p = data[y2] + (3 * x1); |
| 3037 | *(dst++) = *(p++); |
| 3038 | *(dst++) = *(p++); |
| 3039 | *(dst++) = *p; |
| 3040 | |
| 3041 | if (has_alpha) |
| 3042 | *(alpha_dst++) = *(alpha[y2] + x1); |
| 3043 | } |
| 3044 | else |
| 3045 | { |
| 3046 | // weights for the weighted average are proportional to the inverse of the distance |
| 3047 | unsigned char *v1 = data[y1] + (3 * x1); |
| 3048 | unsigned char *v2 = data[y1] + (3 * x2); |
| 3049 | unsigned char *v3 = data[y2] + (3 * x2); |
| 3050 | unsigned char *v4 = data[y2] + (3 * x1); |
| 3051 | |
| 3052 | const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4; |
| 3053 | |
| 3054 | // GRG: Unrolled. |
| 3055 | |
| 3056 | *(dst++) = (unsigned char) |
| 3057 | ( (w1 * *(v1++) + w2 * *(v2++) + |
| 3058 | w3 * *(v3++) + w4 * *(v4++)) / |
| 3059 | (w1 + w2 + w3 + w4) ); |
| 3060 | *(dst++) = (unsigned char) |
| 3061 | ( (w1 * *(v1++) + w2 * *(v2++) + |
| 3062 | w3 * *(v3++) + w4 * *(v4++)) / |
| 3063 | (w1 + w2 + w3 + w4) ); |
| 3064 | *(dst++) = (unsigned char) |
| 3065 | ( (w1 * *v1 + w2 * *v2 + |
| 3066 | w3 * *v3 + w4 * *v4) / |
| 3067 | (w1 + w2 + w3 + w4) ); |
| 3068 | |
| 3069 | if (has_alpha) |
| 3070 | { |
| 3071 | v1 = alpha[y1] + (x1); |
| 3072 | v2 = alpha[y1] + (x2); |
| 3073 | v3 = alpha[y2] + (x2); |
| 3074 | v4 = alpha[y2] + (x1); |
| 3075 | |
| 3076 | *(alpha_dst++) = (unsigned char) |
| 3077 | ( (w1 * *v1 + w2 * *v2 + |
| 3078 | w3 * *v3 + w4 * *v4) / |
| 3079 | (w1 + w2 + w3 + w4) ); |
| 3080 | } |
| 3081 | } |
| 3082 | } |
| 3083 | else |
| 3084 | { |
| 3085 | *(dst++) = blank_r; |
| 3086 | *(dst++) = blank_g; |
| 3087 | *(dst++) = blank_b; |
| 3088 | |
| 3089 | if (has_alpha) |
| 3090 | *(alpha_dst++) = 0; |
| 3091 | } |
| 3092 | } |
| 3093 | } |
| 3094 | } |
| 3095 | else // not interpolating |
| 3096 | { |
| 3097 | for (int y = 0; y < rH; y++) |
| 3098 | { |
| 3099 | for (int x = 0; x < rW; x++) |
| 3100 | { |
| 3101 | wxRealPoint src = wxRotatePoint (x + x1a, y + y1a, cos_angle, -sin_angle, p0); |
| 3102 | |
| 3103 | const int xs = wxRound (src.x); // wxRound rounds to the |
| 3104 | const int ys = wxRound (src.y); // closest integer |
| 3105 | |
| 3106 | if (0 <= xs && xs < w && 0 <= ys && ys < h) |
| 3107 | { |
| 3108 | unsigned char *p = data[ys] + (3 * xs); |
| 3109 | *(dst++) = *(p++); |
| 3110 | *(dst++) = *(p++); |
| 3111 | *(dst++) = *p; |
| 3112 | |
| 3113 | if (has_alpha) |
| 3114 | *(alpha_dst++) = *(alpha[ys] + (xs)); |
| 3115 | } |
| 3116 | else |
| 3117 | { |
| 3118 | *(dst++) = blank_r; |
| 3119 | *(dst++) = blank_g; |
| 3120 | *(dst++) = blank_b; |
| 3121 | |
| 3122 | if (has_alpha) |
| 3123 | *(alpha_dst++) = 255; |
| 3124 | } |
| 3125 | } |
| 3126 | } |
| 3127 | } |
| 3128 | |
| 3129 | delete [] data; |
| 3130 | delete [] alpha; |
| 3131 | |
| 3132 | return rotated; |
| 3133 | } |
| 3134 | |
| 3135 | |
| 3136 | |
| 3137 | |
| 3138 | |
| 3139 | // A module to allow wxImage initialization/cleanup |
| 3140 | // without calling these functions from app.cpp or from |
| 3141 | // the user's application. |
| 3142 | |
| 3143 | class wxImageModule: public wxModule |
| 3144 | { |
| 3145 | DECLARE_DYNAMIC_CLASS(wxImageModule) |
| 3146 | public: |
| 3147 | wxImageModule() {} |
| 3148 | bool OnInit() { wxImage::InitStandardHandlers(); return true; } |
| 3149 | void OnExit() { wxImage::CleanUpHandlers(); } |
| 3150 | }; |
| 3151 | |
| 3152 | IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule) |
| 3153 | |
| 3154 | |
| 3155 | #endif // wxUSE_IMAGE |