| 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 | #ifndef WX_PRECOMP |
| 20 | #include "wx/log.h" |
| 21 | #include "wx/app.h" |
| 22 | #include "wx/hash.h" |
| 23 | #include "wx/utils.h" |
| 24 | #endif |
| 25 | |
| 26 | #include "wx/image.h" |
| 27 | #include "wx/bitmap.h" |
| 28 | #include "wx/debug.h" |
| 29 | #include "wx/filefn.h" |
| 30 | #include "wx/wfstream.h" |
| 31 | #include "wx/intl.h" |
| 32 | #include "wx/module.h" |
| 33 | #include "wx/math.h" |
| 34 | |
| 35 | #if wxUSE_XPM |
| 36 | #include "wx/xpmdecod.h" |
| 37 | #endif |
| 38 | |
| 39 | // For memcpy |
| 40 | #include <string.h> |
| 41 | |
| 42 | //----------------------------------------------------------------------------- |
| 43 | // wxImage |
| 44 | //----------------------------------------------------------------------------- |
| 45 | |
| 46 | class wxImageRefData: public wxObjectRefData |
| 47 | { |
| 48 | public: |
| 49 | wxImageRefData(); |
| 50 | virtual ~wxImageRefData(); |
| 51 | |
| 52 | int m_width; |
| 53 | int m_height; |
| 54 | unsigned char *m_data; |
| 55 | |
| 56 | bool m_hasMask; |
| 57 | unsigned char m_maskRed,m_maskGreen,m_maskBlue; |
| 58 | |
| 59 | // alpha channel data, may be NULL for the formats without alpha support |
| 60 | unsigned char *m_alpha; |
| 61 | |
| 62 | bool m_ok; |
| 63 | |
| 64 | // if true, m_data is pointer to static data and shouldn't be freed |
| 65 | bool m_static; |
| 66 | |
| 67 | // same as m_static but for m_alpha |
| 68 | bool m_staticAlpha; |
| 69 | |
| 70 | #if wxUSE_PALETTE |
| 71 | wxPalette m_palette; |
| 72 | #endif // wxUSE_PALETTE |
| 73 | |
| 74 | wxArrayString m_optionNames; |
| 75 | wxArrayString m_optionValues; |
| 76 | |
| 77 | DECLARE_NO_COPY_CLASS(wxImageRefData) |
| 78 | }; |
| 79 | |
| 80 | wxImageRefData::wxImageRefData() |
| 81 | { |
| 82 | m_width = 0; |
| 83 | m_height = 0; |
| 84 | m_data = |
| 85 | m_alpha = (unsigned char *) NULL; |
| 86 | |
| 87 | m_maskRed = 0; |
| 88 | m_maskGreen = 0; |
| 89 | m_maskBlue = 0; |
| 90 | m_hasMask = false; |
| 91 | |
| 92 | m_ok = false; |
| 93 | m_static = |
| 94 | m_staticAlpha = false; |
| 95 | } |
| 96 | |
| 97 | wxImageRefData::~wxImageRefData() |
| 98 | { |
| 99 | if ( !m_static ) |
| 100 | free( m_data ); |
| 101 | if ( !m_staticAlpha ) |
| 102 | free( m_alpha ); |
| 103 | } |
| 104 | |
| 105 | wxList wxImage::sm_handlers; |
| 106 | |
| 107 | wxImage wxNullImage; |
| 108 | |
| 109 | //----------------------------------------------------------------------------- |
| 110 | |
| 111 | #define M_IMGDATA ((wxImageRefData *)m_refData) |
| 112 | |
| 113 | IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject) |
| 114 | |
| 115 | wxImage::wxImage( int width, int height, bool clear ) |
| 116 | { |
| 117 | Create( width, height, clear ); |
| 118 | } |
| 119 | |
| 120 | wxImage::wxImage( int width, int height, unsigned char* data, bool static_data ) |
| 121 | { |
| 122 | Create( width, height, data, static_data ); |
| 123 | } |
| 124 | |
| 125 | wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data ) |
| 126 | { |
| 127 | Create( width, height, data, alpha, static_data ); |
| 128 | } |
| 129 | |
| 130 | wxImage::wxImage( const wxString& name, long type, int index ) |
| 131 | { |
| 132 | LoadFile( name, type, index ); |
| 133 | } |
| 134 | |
| 135 | wxImage::wxImage( const wxString& name, const wxString& mimetype, int index ) |
| 136 | { |
| 137 | LoadFile( name, mimetype, index ); |
| 138 | } |
| 139 | |
| 140 | #if wxUSE_STREAMS |
| 141 | wxImage::wxImage( wxInputStream& stream, long type, int index ) |
| 142 | { |
| 143 | LoadFile( stream, type, index ); |
| 144 | } |
| 145 | |
| 146 | wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index ) |
| 147 | { |
| 148 | LoadFile( stream, mimetype, index ); |
| 149 | } |
| 150 | #endif // wxUSE_STREAMS |
| 151 | |
| 152 | wxImage::wxImage( const char** xpmData ) |
| 153 | { |
| 154 | Create(xpmData); |
| 155 | } |
| 156 | |
| 157 | wxImage::wxImage( char** xpmData ) |
| 158 | { |
| 159 | Create((const char**) xpmData); |
| 160 | } |
| 161 | |
| 162 | bool wxImage::Create( const char** xpmData ) |
| 163 | { |
| 164 | #if wxUSE_XPM |
| 165 | UnRef(); |
| 166 | |
| 167 | wxXPMDecoder decoder; |
| 168 | (*this) = decoder.ReadData(xpmData); |
| 169 | return Ok(); |
| 170 | #else |
| 171 | return false; |
| 172 | #endif |
| 173 | } |
| 174 | |
| 175 | bool wxImage::Create( int width, int height, bool clear ) |
| 176 | { |
| 177 | UnRef(); |
| 178 | |
| 179 | m_refData = new wxImageRefData(); |
| 180 | |
| 181 | M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 ); |
| 182 | if (!M_IMGDATA->m_data) |
| 183 | { |
| 184 | UnRef(); |
| 185 | return false; |
| 186 | } |
| 187 | |
| 188 | if (clear) |
| 189 | memset(M_IMGDATA->m_data, 0, width*height*3); |
| 190 | |
| 191 | M_IMGDATA->m_width = width; |
| 192 | M_IMGDATA->m_height = height; |
| 193 | M_IMGDATA->m_ok = true; |
| 194 | |
| 195 | return true; |
| 196 | } |
| 197 | |
| 198 | bool wxImage::Create( int width, int height, unsigned char* data, bool static_data ) |
| 199 | { |
| 200 | UnRef(); |
| 201 | |
| 202 | wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") ); |
| 203 | |
| 204 | m_refData = new wxImageRefData(); |
| 205 | |
| 206 | M_IMGDATA->m_data = data; |
| 207 | M_IMGDATA->m_width = width; |
| 208 | M_IMGDATA->m_height = height; |
| 209 | M_IMGDATA->m_ok = true; |
| 210 | M_IMGDATA->m_static = static_data; |
| 211 | |
| 212 | return true; |
| 213 | } |
| 214 | |
| 215 | bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data ) |
| 216 | { |
| 217 | UnRef(); |
| 218 | |
| 219 | wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") ); |
| 220 | |
| 221 | m_refData = new wxImageRefData(); |
| 222 | |
| 223 | M_IMGDATA->m_data = data; |
| 224 | M_IMGDATA->m_alpha = alpha; |
| 225 | M_IMGDATA->m_width = width; |
| 226 | M_IMGDATA->m_height = height; |
| 227 | M_IMGDATA->m_ok = true; |
| 228 | M_IMGDATA->m_static = static_data; |
| 229 | |
| 230 | return true; |
| 231 | } |
| 232 | |
| 233 | void wxImage::Destroy() |
| 234 | { |
| 235 | UnRef(); |
| 236 | } |
| 237 | |
| 238 | wxImage wxImage::Copy() const |
| 239 | { |
| 240 | wxImage image; |
| 241 | |
| 242 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 243 | |
| 244 | image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); |
| 245 | |
| 246 | unsigned char *data = image.GetData(); |
| 247 | |
| 248 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 249 | |
| 250 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); |
| 251 | image.SetMask( M_IMGDATA->m_hasMask ); |
| 252 | |
| 253 | memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 ); |
| 254 | |
| 255 | wxImageRefData *imgData = (wxImageRefData *)image.m_refData; |
| 256 | |
| 257 | // also copy the alpha channel |
| 258 | if (HasAlpha()) |
| 259 | { |
| 260 | image.SetAlpha(); |
| 261 | unsigned char* alpha = image.GetAlpha(); |
| 262 | memcpy( alpha, GetAlpha(), M_IMGDATA->m_width*M_IMGDATA->m_height ); |
| 263 | } |
| 264 | |
| 265 | // also copy the image options |
| 266 | imgData->m_optionNames = M_IMGDATA->m_optionNames; |
| 267 | imgData->m_optionValues = M_IMGDATA->m_optionValues; |
| 268 | |
| 269 | return image; |
| 270 | } |
| 271 | |
| 272 | wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const |
| 273 | { |
| 274 | if( xFactor == 1 && yFactor == 1 ) |
| 275 | return Copy() ; |
| 276 | |
| 277 | wxImage image; |
| 278 | |
| 279 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 280 | |
| 281 | // can't scale to/from 0 size |
| 282 | wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image, |
| 283 | wxT("invalid new image size") ); |
| 284 | |
| 285 | long old_height = M_IMGDATA->m_height, |
| 286 | old_width = M_IMGDATA->m_width; |
| 287 | |
| 288 | wxCHECK_MSG( (old_height > 0) && (old_width > 0), image, |
| 289 | wxT("invalid old image size") ); |
| 290 | |
| 291 | long width = old_width / xFactor ; |
| 292 | long height = old_height / yFactor ; |
| 293 | |
| 294 | image.Create( width, height, false ); |
| 295 | |
| 296 | char unsigned *data = image.GetData(); |
| 297 | |
| 298 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 299 | |
| 300 | bool hasMask = false ; |
| 301 | unsigned char maskRed = 0; |
| 302 | unsigned char maskGreen = 0; |
| 303 | unsigned char maskBlue =0 ; |
| 304 | |
| 305 | unsigned char *source_data = M_IMGDATA->m_data; |
| 306 | unsigned char *target_data = data; |
| 307 | unsigned char *source_alpha = 0 ; |
| 308 | unsigned char *target_alpha = 0 ; |
| 309 | if (M_IMGDATA->m_hasMask) |
| 310 | { |
| 311 | hasMask = true ; |
| 312 | maskRed = M_IMGDATA->m_maskRed; |
| 313 | maskGreen = M_IMGDATA->m_maskGreen; |
| 314 | maskBlue =M_IMGDATA->m_maskBlue ; |
| 315 | |
| 316 | image.SetMaskColour( M_IMGDATA->m_maskRed, |
| 317 | M_IMGDATA->m_maskGreen, |
| 318 | M_IMGDATA->m_maskBlue ); |
| 319 | } |
| 320 | else |
| 321 | { |
| 322 | source_alpha = M_IMGDATA->m_alpha ; |
| 323 | if ( source_alpha ) |
| 324 | { |
| 325 | image.SetAlpha() ; |
| 326 | target_alpha = image.GetAlpha() ; |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | for (long y = 0; y < height; y++) |
| 331 | { |
| 332 | for (long x = 0; x < width; x++) |
| 333 | { |
| 334 | unsigned long avgRed = 0 ; |
| 335 | unsigned long avgGreen = 0; |
| 336 | unsigned long avgBlue = 0; |
| 337 | unsigned long avgAlpha = 0 ; |
| 338 | unsigned long counter = 0 ; |
| 339 | // determine average |
| 340 | for ( int y1 = 0 ; y1 < yFactor ; ++y1 ) |
| 341 | { |
| 342 | long y_offset = (y * yFactor + y1) * old_width; |
| 343 | for ( int x1 = 0 ; x1 < xFactor ; ++x1 ) |
| 344 | { |
| 345 | unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ; |
| 346 | unsigned char red = pixel[0] ; |
| 347 | unsigned char green = pixel[1] ; |
| 348 | unsigned char blue = pixel[2] ; |
| 349 | unsigned char alpha = 255 ; |
| 350 | if ( source_alpha ) |
| 351 | alpha = *(source_alpha + y_offset + x * xFactor + x1) ; |
| 352 | if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue ) |
| 353 | { |
| 354 | if ( alpha > 0 ) |
| 355 | { |
| 356 | avgRed += red ; |
| 357 | avgGreen += green ; |
| 358 | avgBlue += blue ; |
| 359 | } |
| 360 | avgAlpha += alpha ; |
| 361 | counter++ ; |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | if ( counter == 0 ) |
| 366 | { |
| 367 | *(target_data++) = M_IMGDATA->m_maskRed ; |
| 368 | *(target_data++) = M_IMGDATA->m_maskGreen ; |
| 369 | *(target_data++) = M_IMGDATA->m_maskBlue ; |
| 370 | } |
| 371 | else |
| 372 | { |
| 373 | if ( source_alpha ) |
| 374 | *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ; |
| 375 | *(target_data++) = (unsigned char)(avgRed / counter); |
| 376 | *(target_data++) = (unsigned char)(avgGreen / counter); |
| 377 | *(target_data++) = (unsigned char)(avgBlue / counter); |
| 378 | } |
| 379 | } |
| 380 | } |
| 381 | |
| 382 | // In case this is a cursor, make sure the hotspot is scaled accordingly: |
| 383 | if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) |
| 384 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, |
| 385 | (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X))/xFactor); |
| 386 | if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) |
| 387 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, |
| 388 | (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y))/yFactor); |
| 389 | |
| 390 | return image; |
| 391 | } |
| 392 | |
| 393 | wxImage wxImage::Scale( int width, int height ) const |
| 394 | { |
| 395 | wxImage image; |
| 396 | |
| 397 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 398 | |
| 399 | // can't scale to/from 0 size |
| 400 | wxCHECK_MSG( (width > 0) && (height > 0), image, |
| 401 | wxT("invalid new image size") ); |
| 402 | |
| 403 | long old_height = M_IMGDATA->m_height, |
| 404 | old_width = M_IMGDATA->m_width; |
| 405 | wxCHECK_MSG( (old_height > 0) && (old_width > 0), image, |
| 406 | wxT("invalid old image size") ); |
| 407 | |
| 408 | if ( old_width % width == 0 && old_width >= width && |
| 409 | old_height % height == 0 && old_height >= height ) |
| 410 | { |
| 411 | return ShrinkBy( old_width / width , old_height / height ) ; |
| 412 | } |
| 413 | image.Create( width, height, false ); |
| 414 | |
| 415 | unsigned char *data = image.GetData(); |
| 416 | |
| 417 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 418 | |
| 419 | unsigned char *source_data = M_IMGDATA->m_data; |
| 420 | unsigned char *target_data = data; |
| 421 | unsigned char *source_alpha = 0 ; |
| 422 | unsigned char *target_alpha = 0 ; |
| 423 | |
| 424 | if (M_IMGDATA->m_hasMask) |
| 425 | { |
| 426 | image.SetMaskColour( M_IMGDATA->m_maskRed, |
| 427 | M_IMGDATA->m_maskGreen, |
| 428 | M_IMGDATA->m_maskBlue ); |
| 429 | } |
| 430 | else |
| 431 | { |
| 432 | source_alpha = M_IMGDATA->m_alpha ; |
| 433 | if ( source_alpha ) |
| 434 | { |
| 435 | image.SetAlpha() ; |
| 436 | target_alpha = image.GetAlpha() ; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | long x_delta = (old_width<<16) / width; |
| 441 | long y_delta = (old_height<<16) / height; |
| 442 | |
| 443 | unsigned char* dest_pixel = target_data; |
| 444 | |
| 445 | long y = 0; |
| 446 | for ( long j = 0; j < height; j++ ) |
| 447 | { |
| 448 | unsigned char* src_line = &source_data[(y>>16)*old_width*3]; |
| 449 | unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ; |
| 450 | |
| 451 | long x = 0; |
| 452 | for ( long i = 0; i < width; i++ ) |
| 453 | { |
| 454 | unsigned char* src_pixel = &src_line[(x>>16)*3]; |
| 455 | unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ; |
| 456 | dest_pixel[0] = src_pixel[0]; |
| 457 | dest_pixel[1] = src_pixel[1]; |
| 458 | dest_pixel[2] = src_pixel[2]; |
| 459 | dest_pixel += 3; |
| 460 | if ( source_alpha ) |
| 461 | *(target_alpha++) = *src_alpha_pixel ; |
| 462 | x += x_delta; |
| 463 | } |
| 464 | |
| 465 | y += y_delta; |
| 466 | } |
| 467 | |
| 468 | // In case this is a cursor, make sure the hotspot is scaled accordingly: |
| 469 | if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ) |
| 470 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, |
| 471 | (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)*width)/old_width); |
| 472 | if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ) |
| 473 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, |
| 474 | (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y)*height)/old_height); |
| 475 | |
| 476 | return image; |
| 477 | } |
| 478 | |
| 479 | wxImage wxImage::Rotate90( bool clockwise ) const |
| 480 | { |
| 481 | wxImage image; |
| 482 | |
| 483 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 484 | |
| 485 | image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false ); |
| 486 | |
| 487 | unsigned char *data = image.GetData(); |
| 488 | |
| 489 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 490 | |
| 491 | unsigned char *source_data = M_IMGDATA->m_data; |
| 492 | unsigned char *target_data; |
| 493 | unsigned char *alpha_data = 0 ; |
| 494 | unsigned char *source_alpha = 0 ; |
| 495 | unsigned char *target_alpha = 0 ; |
| 496 | |
| 497 | if (M_IMGDATA->m_hasMask) |
| 498 | { |
| 499 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); |
| 500 | } |
| 501 | else |
| 502 | { |
| 503 | source_alpha = M_IMGDATA->m_alpha ; |
| 504 | if ( source_alpha ) |
| 505 | { |
| 506 | image.SetAlpha() ; |
| 507 | alpha_data = image.GetAlpha() ; |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | long height = M_IMGDATA->m_height; |
| 512 | long width = M_IMGDATA->m_width; |
| 513 | |
| 514 | for (long j = 0; j < height; j++) |
| 515 | { |
| 516 | for (long i = 0; i < width; i++) |
| 517 | { |
| 518 | if (clockwise) |
| 519 | { |
| 520 | target_data = data + (((i+1)*height) - j - 1)*3; |
| 521 | if(source_alpha) |
| 522 | target_alpha = alpha_data + (((i+1)*height) - j - 1); |
| 523 | } |
| 524 | else |
| 525 | { |
| 526 | target_data = data + ((height*(width-1)) + j - (i*height))*3; |
| 527 | if(source_alpha) |
| 528 | target_alpha = alpha_data + ((height*(width-1)) + j - (i*height)); |
| 529 | } |
| 530 | memcpy( target_data, source_data, 3 ); |
| 531 | source_data += 3; |
| 532 | |
| 533 | if(source_alpha) |
| 534 | { |
| 535 | memcpy( target_alpha, source_alpha, 1 ); |
| 536 | source_alpha += 1; |
| 537 | } |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | return image; |
| 542 | } |
| 543 | |
| 544 | wxImage wxImage::Mirror( bool horizontally ) const |
| 545 | { |
| 546 | wxImage image; |
| 547 | |
| 548 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 549 | |
| 550 | image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); |
| 551 | |
| 552 | unsigned char *data = image.GetData(); |
| 553 | unsigned char *alpha = NULL; |
| 554 | |
| 555 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 556 | |
| 557 | if (M_IMGDATA->m_alpha != NULL) { |
| 558 | image.SetAlpha(); |
| 559 | alpha = image.GetAlpha(); |
| 560 | wxCHECK_MSG( alpha, image, wxT("unable to create alpha channel") ); |
| 561 | } |
| 562 | |
| 563 | if (M_IMGDATA->m_hasMask) |
| 564 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); |
| 565 | |
| 566 | long height = M_IMGDATA->m_height; |
| 567 | long width = M_IMGDATA->m_width; |
| 568 | |
| 569 | unsigned char *source_data = M_IMGDATA->m_data; |
| 570 | unsigned char *target_data; |
| 571 | |
| 572 | if (horizontally) |
| 573 | { |
| 574 | for (long j = 0; j < height; j++) |
| 575 | { |
| 576 | data += width*3; |
| 577 | target_data = data-3; |
| 578 | for (long i = 0; i < width; i++) |
| 579 | { |
| 580 | memcpy( target_data, source_data, 3 ); |
| 581 | source_data += 3; |
| 582 | target_data -= 3; |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | if (alpha != NULL) |
| 587 | { |
| 588 | // src_alpha starts at the first pixel and increases by 1 after each step |
| 589 | // (a step here is the copy of the alpha value of one pixel) |
| 590 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; |
| 591 | // dest_alpha starts just beyond the first line, decreases before each step, |
| 592 | // and after each line is finished, increases by 2 widths (skipping the line |
| 593 | // just copied and the line that will be copied next) |
| 594 | unsigned char *dest_alpha = alpha + width; |
| 595 | |
| 596 | for (long jj = 0; jj < height; ++jj) |
| 597 | { |
| 598 | for (long i = 0; i < width; ++i) { |
| 599 | *(--dest_alpha) = *(src_alpha++); // copy one pixel |
| 600 | } |
| 601 | dest_alpha += 2 * width; // advance beyond the end of the next line |
| 602 | } |
| 603 | } |
| 604 | } |
| 605 | else |
| 606 | { |
| 607 | for (long i = 0; i < height; i++) |
| 608 | { |
| 609 | target_data = data + 3*width*(height-1-i); |
| 610 | memcpy( target_data, source_data, (size_t)3*width ); |
| 611 | source_data += 3*width; |
| 612 | } |
| 613 | |
| 614 | if (alpha != NULL) |
| 615 | { |
| 616 | // src_alpha starts at the first pixel and increases by 1 width after each step |
| 617 | // (a step here is the copy of the alpha channel of an entire line) |
| 618 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; |
| 619 | // dest_alpha starts just beyond the last line (beyond the whole image) |
| 620 | // and decreases by 1 width before each step |
| 621 | unsigned char *dest_alpha = alpha + width * height; |
| 622 | |
| 623 | for (long jj = 0; jj < height; ++jj) |
| 624 | { |
| 625 | dest_alpha -= width; |
| 626 | memcpy( dest_alpha, src_alpha, (size_t)width ); |
| 627 | src_alpha += width; |
| 628 | } |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | return image; |
| 633 | } |
| 634 | |
| 635 | wxImage wxImage::GetSubImage( const wxRect &rect ) const |
| 636 | { |
| 637 | wxImage image; |
| 638 | |
| 639 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 640 | |
| 641 | wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && |
| 642 | (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()), |
| 643 | image, wxT("invalid subimage size") ); |
| 644 | |
| 645 | const int subwidth = rect.GetWidth(); |
| 646 | const int subheight = rect.GetHeight(); |
| 647 | |
| 648 | image.Create( subwidth, subheight, false ); |
| 649 | |
| 650 | const unsigned char *src_data = GetData(); |
| 651 | const unsigned char *src_alpha = M_IMGDATA->m_alpha; |
| 652 | unsigned char *subdata = image.GetData(); |
| 653 | unsigned char *subalpha = NULL; |
| 654 | |
| 655 | wxCHECK_MSG( subdata, image, wxT("unable to create image") ); |
| 656 | |
| 657 | if (src_alpha != NULL) { |
| 658 | image.SetAlpha(); |
| 659 | subalpha = image.GetAlpha(); |
| 660 | wxCHECK_MSG( subalpha, image, wxT("unable to create alpha channel")); |
| 661 | } |
| 662 | |
| 663 | if (M_IMGDATA->m_hasMask) |
| 664 | image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue ); |
| 665 | |
| 666 | const int width = GetWidth(); |
| 667 | const int pixsoff = rect.GetLeft() + width * rect.GetTop(); |
| 668 | |
| 669 | src_data += 3 * pixsoff; |
| 670 | src_alpha += pixsoff; // won't be used if was NULL, so this is ok |
| 671 | |
| 672 | for (long j = 0; j < subheight; ++j) |
| 673 | { |
| 674 | memcpy( subdata, src_data, 3 * subwidth ); |
| 675 | subdata += 3 * subwidth; |
| 676 | src_data += 3 * width; |
| 677 | if (subalpha != NULL) { |
| 678 | memcpy( subalpha, src_alpha, subwidth ); |
| 679 | subalpha += subwidth; |
| 680 | src_alpha += width; |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | return image; |
| 685 | } |
| 686 | |
| 687 | wxImage wxImage::Size( const wxSize& size, const wxPoint& pos, |
| 688 | int r_, int g_, int b_ ) const |
| 689 | { |
| 690 | wxImage image; |
| 691 | |
| 692 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 693 | wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") ); |
| 694 | |
| 695 | int width = GetWidth(), height = GetHeight(); |
| 696 | image.Create(size.GetWidth(), size.GetHeight(), false); |
| 697 | |
| 698 | unsigned char r = (unsigned char)r_; |
| 699 | unsigned char g = (unsigned char)g_; |
| 700 | unsigned char b = (unsigned char)b_; |
| 701 | if ((r_ == -1) && (g_ == -1) && (b_ == -1)) |
| 702 | { |
| 703 | GetOrFindMaskColour( &r, &g, &b ); |
| 704 | image.SetMaskColour(r, g, b); |
| 705 | } |
| 706 | |
| 707 | image.SetRGB(wxRect(), r, g, b); |
| 708 | |
| 709 | wxRect subRect(pos.x, pos.y, width, height); |
| 710 | wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight()); |
| 711 | if (pos.x < 0) |
| 712 | finalRect.width -= pos.x; |
| 713 | if (pos.y < 0) |
| 714 | finalRect.height -= pos.y; |
| 715 | |
| 716 | subRect.Intersect(finalRect); |
| 717 | |
| 718 | if (!subRect.IsEmpty()) |
| 719 | { |
| 720 | if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height)) |
| 721 | image.Paste(*this, pos.x, pos.y); |
| 722 | else |
| 723 | image.Paste(GetSubImage(subRect), pos.x, pos.y); |
| 724 | } |
| 725 | |
| 726 | return image; |
| 727 | } |
| 728 | |
| 729 | void wxImage::Paste( const wxImage &image, int x, int y ) |
| 730 | { |
| 731 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 732 | wxCHECK_RET( image.Ok(), wxT("invalid image") ); |
| 733 | |
| 734 | int xx = 0; |
| 735 | int yy = 0; |
| 736 | int width = image.GetWidth(); |
| 737 | int height = image.GetHeight(); |
| 738 | |
| 739 | if (x < 0) |
| 740 | { |
| 741 | xx = -x; |
| 742 | width += x; |
| 743 | } |
| 744 | if (y < 0) |
| 745 | { |
| 746 | yy = -y; |
| 747 | height += y; |
| 748 | } |
| 749 | |
| 750 | if ((x+xx)+width > M_IMGDATA->m_width) |
| 751 | width = M_IMGDATA->m_width - (x+xx); |
| 752 | if ((y+yy)+height > M_IMGDATA->m_height) |
| 753 | height = M_IMGDATA->m_height - (y+yy); |
| 754 | |
| 755 | if (width < 1) return; |
| 756 | if (height < 1) return; |
| 757 | |
| 758 | if ((!HasMask() && !image.HasMask()) || |
| 759 | (HasMask() && !image.HasMask()) || |
| 760 | ((HasMask() && image.HasMask() && |
| 761 | (GetMaskRed()==image.GetMaskRed()) && |
| 762 | (GetMaskGreen()==image.GetMaskGreen()) && |
| 763 | (GetMaskBlue()==image.GetMaskBlue())))) |
| 764 | { |
| 765 | width *= 3; |
| 766 | unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); |
| 767 | int source_step = image.GetWidth()*3; |
| 768 | |
| 769 | unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; |
| 770 | int target_step = M_IMGDATA->m_width*3; |
| 771 | for (int j = 0; j < height; j++) |
| 772 | { |
| 773 | memcpy( target_data, source_data, width ); |
| 774 | source_data += source_step; |
| 775 | target_data += target_step; |
| 776 | } |
| 777 | return; |
| 778 | } |
| 779 | |
| 780 | if (!HasMask() && image.HasMask()) |
| 781 | { |
| 782 | unsigned char r = image.GetMaskRed(); |
| 783 | unsigned char g = image.GetMaskGreen(); |
| 784 | unsigned char b = image.GetMaskBlue(); |
| 785 | |
| 786 | width *= 3; |
| 787 | unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth(); |
| 788 | int source_step = image.GetWidth()*3; |
| 789 | |
| 790 | unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width; |
| 791 | int target_step = M_IMGDATA->m_width*3; |
| 792 | |
| 793 | for (int j = 0; j < height; j++) |
| 794 | { |
| 795 | for (int i = 0; i < width; i+=3) |
| 796 | { |
| 797 | if ((source_data[i] != r) && |
| 798 | (source_data[i+1] != g) && |
| 799 | (source_data[i+2] != b)) |
| 800 | { |
| 801 | memcpy( target_data+i, source_data+i, 3 ); |
| 802 | } |
| 803 | } |
| 804 | source_data += source_step; |
| 805 | target_data += target_step; |
| 806 | } |
| 807 | } |
| 808 | } |
| 809 | |
| 810 | void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1, |
| 811 | unsigned char r2, unsigned char g2, unsigned char b2 ) |
| 812 | { |
| 813 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 814 | |
| 815 | unsigned char *data = GetData(); |
| 816 | |
| 817 | const int w = GetWidth(); |
| 818 | const int h = GetHeight(); |
| 819 | |
| 820 | for (int j = 0; j < h; j++) |
| 821 | for (int i = 0; i < w; i++) |
| 822 | { |
| 823 | if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1)) |
| 824 | { |
| 825 | data[0] = r2; |
| 826 | data[1] = g2; |
| 827 | data[2] = b2; |
| 828 | } |
| 829 | data += 3; |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | wxImage wxImage::ConvertToGreyscale( double lr, double lg, double lb ) const |
| 834 | { |
| 835 | wxImage image; |
| 836 | |
| 837 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 838 | |
| 839 | image.Create(M_IMGDATA->m_width, M_IMGDATA->m_height, false); |
| 840 | |
| 841 | unsigned char *dest = image.GetData(); |
| 842 | |
| 843 | wxCHECK_MSG( dest, image, wxT("unable to create image") ); |
| 844 | |
| 845 | unsigned char *src = M_IMGDATA->m_data; |
| 846 | bool hasMask = M_IMGDATA->m_hasMask; |
| 847 | unsigned char maskRed = M_IMGDATA->m_maskRed; |
| 848 | unsigned char maskGreen = M_IMGDATA->m_maskGreen; |
| 849 | unsigned char maskBlue = M_IMGDATA->m_maskBlue; |
| 850 | |
| 851 | if ( hasMask ) |
| 852 | image.SetMaskColour(maskRed, maskGreen, maskBlue); |
| 853 | |
| 854 | const long size = M_IMGDATA->m_width * M_IMGDATA->m_height; |
| 855 | for ( long i = 0; i < size; i++, src += 3, dest += 3 ) |
| 856 | { |
| 857 | // don't modify the mask |
| 858 | if ( hasMask && src[0] == maskRed && src[1] == maskGreen && src[2] == maskBlue ) |
| 859 | { |
| 860 | memcpy(dest, src, 3); |
| 861 | } |
| 862 | else |
| 863 | { |
| 864 | // calculate the luma |
| 865 | double luma = (src[0] * lr + src[1] * lg + src[2] * lb) + 0.5; |
| 866 | dest[0] = dest[1] = dest[2] = wx_static_cast(unsigned char, luma); |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | return image; |
| 871 | } |
| 872 | |
| 873 | wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const |
| 874 | { |
| 875 | wxImage image; |
| 876 | |
| 877 | wxCHECK_MSG( Ok(), image, wxT("invalid image") ); |
| 878 | |
| 879 | image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false ); |
| 880 | |
| 881 | unsigned char *data = image.GetData(); |
| 882 | |
| 883 | wxCHECK_MSG( data, image, wxT("unable to create image") ); |
| 884 | |
| 885 | if (M_IMGDATA->m_hasMask) |
| 886 | { |
| 887 | if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g && |
| 888 | M_IMGDATA->m_maskBlue == b) |
| 889 | image.SetMaskColour( 255, 255, 255 ); |
| 890 | else |
| 891 | image.SetMaskColour( 0, 0, 0 ); |
| 892 | } |
| 893 | |
| 894 | long size = M_IMGDATA->m_height * M_IMGDATA->m_width; |
| 895 | |
| 896 | unsigned char *srcd = M_IMGDATA->m_data; |
| 897 | unsigned char *tard = image.GetData(); |
| 898 | |
| 899 | for ( long i = 0; i < size; i++, srcd += 3, tard += 3 ) |
| 900 | { |
| 901 | if (srcd[0] == r && srcd[1] == g && srcd[2] == b) |
| 902 | tard[0] = tard[1] = tard[2] = 255; |
| 903 | else |
| 904 | tard[0] = tard[1] = tard[2] = 0; |
| 905 | } |
| 906 | |
| 907 | return image; |
| 908 | } |
| 909 | |
| 910 | int wxImage::GetWidth() const |
| 911 | { |
| 912 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 913 | |
| 914 | return M_IMGDATA->m_width; |
| 915 | } |
| 916 | |
| 917 | int wxImage::GetHeight() const |
| 918 | { |
| 919 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 920 | |
| 921 | return M_IMGDATA->m_height; |
| 922 | } |
| 923 | |
| 924 | long wxImage::XYToIndex(int x, int y) const |
| 925 | { |
| 926 | if ( Ok() && |
| 927 | x >= 0 && y >= 0 && |
| 928 | x < M_IMGDATA->m_width && y < M_IMGDATA->m_height ) |
| 929 | { |
| 930 | return y*M_IMGDATA->m_width + x; |
| 931 | } |
| 932 | |
| 933 | return -1; |
| 934 | } |
| 935 | |
| 936 | void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b ) |
| 937 | { |
| 938 | long pos = XYToIndex(x, y); |
| 939 | wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); |
| 940 | |
| 941 | pos *= 3; |
| 942 | |
| 943 | M_IMGDATA->m_data[ pos ] = r; |
| 944 | M_IMGDATA->m_data[ pos+1 ] = g; |
| 945 | M_IMGDATA->m_data[ pos+2 ] = b; |
| 946 | } |
| 947 | |
| 948 | void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b ) |
| 949 | { |
| 950 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 951 | |
| 952 | wxRect rect(rect_); |
| 953 | wxRect imageRect(0, 0, GetWidth(), GetHeight()); |
| 954 | if ( rect == wxRect() ) |
| 955 | { |
| 956 | rect = imageRect; |
| 957 | } |
| 958 | else |
| 959 | { |
| 960 | wxCHECK_RET( imageRect.Inside(rect.GetTopLeft()) && |
| 961 | imageRect.Inside(rect.GetBottomRight()), |
| 962 | wxT("invalid bounding rectangle") ); |
| 963 | } |
| 964 | |
| 965 | int x1 = rect.GetLeft(), |
| 966 | y1 = rect.GetTop(), |
| 967 | x2 = rect.GetRight() + 1, |
| 968 | y2 = rect.GetBottom() + 1; |
| 969 | |
| 970 | unsigned char *data wxDUMMY_INITIALIZE(NULL); |
| 971 | int x, y, width = GetWidth(); |
| 972 | for (y = y1; y < y2; y++) |
| 973 | { |
| 974 | data = M_IMGDATA->m_data + (y*width + x1)*3; |
| 975 | for (x = x1; x < x2; x++) |
| 976 | { |
| 977 | *data++ = r; |
| 978 | *data++ = g; |
| 979 | *data++ = b; |
| 980 | } |
| 981 | } |
| 982 | } |
| 983 | |
| 984 | unsigned char wxImage::GetRed( int x, int y ) const |
| 985 | { |
| 986 | long pos = XYToIndex(x, y); |
| 987 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); |
| 988 | |
| 989 | pos *= 3; |
| 990 | |
| 991 | return M_IMGDATA->m_data[pos]; |
| 992 | } |
| 993 | |
| 994 | unsigned char wxImage::GetGreen( int x, int y ) const |
| 995 | { |
| 996 | long pos = XYToIndex(x, y); |
| 997 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); |
| 998 | |
| 999 | pos *= 3; |
| 1000 | |
| 1001 | return M_IMGDATA->m_data[pos+1]; |
| 1002 | } |
| 1003 | |
| 1004 | unsigned char wxImage::GetBlue( int x, int y ) const |
| 1005 | { |
| 1006 | long pos = XYToIndex(x, y); |
| 1007 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); |
| 1008 | |
| 1009 | pos *= 3; |
| 1010 | |
| 1011 | return M_IMGDATA->m_data[pos+2]; |
| 1012 | } |
| 1013 | |
| 1014 | bool wxImage::Ok() const |
| 1015 | { |
| 1016 | // image of 0 width or height can't be considered ok - at least because it |
| 1017 | // causes crashes in ConvertToBitmap() if we don't catch it in time |
| 1018 | wxImageRefData *data = M_IMGDATA; |
| 1019 | return data && data->m_ok && data->m_width && data->m_height; |
| 1020 | } |
| 1021 | |
| 1022 | unsigned char *wxImage::GetData() const |
| 1023 | { |
| 1024 | wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); |
| 1025 | |
| 1026 | return M_IMGDATA->m_data; |
| 1027 | } |
| 1028 | |
| 1029 | void wxImage::SetData( unsigned char *data, bool static_data ) |
| 1030 | { |
| 1031 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1032 | |
| 1033 | wxImageRefData *newRefData = new wxImageRefData(); |
| 1034 | |
| 1035 | newRefData->m_width = M_IMGDATA->m_width; |
| 1036 | newRefData->m_height = M_IMGDATA->m_height; |
| 1037 | newRefData->m_data = data; |
| 1038 | newRefData->m_ok = true; |
| 1039 | newRefData->m_maskRed = M_IMGDATA->m_maskRed; |
| 1040 | newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; |
| 1041 | newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; |
| 1042 | newRefData->m_hasMask = M_IMGDATA->m_hasMask; |
| 1043 | newRefData->m_static = static_data; |
| 1044 | |
| 1045 | UnRef(); |
| 1046 | |
| 1047 | m_refData = newRefData; |
| 1048 | } |
| 1049 | |
| 1050 | void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data ) |
| 1051 | { |
| 1052 | wxImageRefData *newRefData = new wxImageRefData(); |
| 1053 | |
| 1054 | if (m_refData) |
| 1055 | { |
| 1056 | newRefData->m_width = new_width; |
| 1057 | newRefData->m_height = new_height; |
| 1058 | newRefData->m_data = data; |
| 1059 | newRefData->m_ok = true; |
| 1060 | newRefData->m_maskRed = M_IMGDATA->m_maskRed; |
| 1061 | newRefData->m_maskGreen = M_IMGDATA->m_maskGreen; |
| 1062 | newRefData->m_maskBlue = M_IMGDATA->m_maskBlue; |
| 1063 | newRefData->m_hasMask = M_IMGDATA->m_hasMask; |
| 1064 | } |
| 1065 | else |
| 1066 | { |
| 1067 | newRefData->m_width = new_width; |
| 1068 | newRefData->m_height = new_height; |
| 1069 | newRefData->m_data = data; |
| 1070 | newRefData->m_ok = true; |
| 1071 | } |
| 1072 | newRefData->m_static = static_data; |
| 1073 | |
| 1074 | UnRef(); |
| 1075 | |
| 1076 | m_refData = newRefData; |
| 1077 | } |
| 1078 | |
| 1079 | // ---------------------------------------------------------------------------- |
| 1080 | // alpha channel support |
| 1081 | // ---------------------------------------------------------------------------- |
| 1082 | |
| 1083 | void wxImage::SetAlpha(int x, int y, unsigned char alpha) |
| 1084 | { |
| 1085 | wxCHECK_RET( HasAlpha(), wxT("no alpha channel") ); |
| 1086 | |
| 1087 | long pos = XYToIndex(x, y); |
| 1088 | wxCHECK_RET( pos != -1, wxT("invalid image coordinates") ); |
| 1089 | |
| 1090 | M_IMGDATA->m_alpha[pos] = alpha; |
| 1091 | } |
| 1092 | |
| 1093 | unsigned char wxImage::GetAlpha(int x, int y) const |
| 1094 | { |
| 1095 | wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") ); |
| 1096 | |
| 1097 | long pos = XYToIndex(x, y); |
| 1098 | wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") ); |
| 1099 | |
| 1100 | return M_IMGDATA->m_alpha[pos]; |
| 1101 | } |
| 1102 | |
| 1103 | bool |
| 1104 | wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b) |
| 1105 | { |
| 1106 | SetAlpha(NULL); |
| 1107 | |
| 1108 | const int w = M_IMGDATA->m_width; |
| 1109 | const int h = M_IMGDATA->m_height; |
| 1110 | |
| 1111 | unsigned char *alpha = GetAlpha(); |
| 1112 | unsigned char *data = GetData(); |
| 1113 | |
| 1114 | for ( int y = 0; y < h; y++ ) |
| 1115 | { |
| 1116 | for ( int x = 0; x < w; x++ ) |
| 1117 | { |
| 1118 | *alpha++ = *data; |
| 1119 | *data++ = r; |
| 1120 | *data++ = g; |
| 1121 | *data++ = b; |
| 1122 | } |
| 1123 | } |
| 1124 | |
| 1125 | return true; |
| 1126 | } |
| 1127 | |
| 1128 | void wxImage::SetAlpha( unsigned char *alpha, bool static_data ) |
| 1129 | { |
| 1130 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1131 | |
| 1132 | if ( !alpha ) |
| 1133 | { |
| 1134 | alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height); |
| 1135 | } |
| 1136 | |
| 1137 | free(M_IMGDATA->m_alpha); |
| 1138 | M_IMGDATA->m_alpha = alpha; |
| 1139 | M_IMGDATA->m_staticAlpha = static_data; |
| 1140 | } |
| 1141 | |
| 1142 | unsigned char *wxImage::GetAlpha() const |
| 1143 | { |
| 1144 | wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") ); |
| 1145 | |
| 1146 | return M_IMGDATA->m_alpha; |
| 1147 | } |
| 1148 | |
| 1149 | void wxImage::InitAlpha() |
| 1150 | { |
| 1151 | wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") ); |
| 1152 | |
| 1153 | // initialize memory for alpha channel |
| 1154 | SetAlpha(); |
| 1155 | |
| 1156 | unsigned char *alpha = M_IMGDATA->m_alpha; |
| 1157 | const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height; |
| 1158 | |
| 1159 | if ( HasMask() ) |
| 1160 | { |
| 1161 | // use the mask to initialize the alpha channel. |
| 1162 | const unsigned char * const alphaEnd = alpha + lenAlpha; |
| 1163 | |
| 1164 | const unsigned char mr = M_IMGDATA->m_maskRed; |
| 1165 | const unsigned char mg = M_IMGDATA->m_maskGreen; |
| 1166 | const unsigned char mb = M_IMGDATA->m_maskBlue; |
| 1167 | for ( unsigned char *src = M_IMGDATA->m_data; |
| 1168 | alpha < alphaEnd; |
| 1169 | src += 3, alpha++ ) |
| 1170 | { |
| 1171 | *alpha = (src[0] == mr && src[1] == mg && src[2] == mb) |
| 1172 | ? wxIMAGE_ALPHA_TRANSPARENT |
| 1173 | : wxIMAGE_ALPHA_OPAQUE; |
| 1174 | } |
| 1175 | |
| 1176 | M_IMGDATA->m_hasMask = false; |
| 1177 | } |
| 1178 | else // no mask |
| 1179 | { |
| 1180 | // make the image fully opaque |
| 1181 | memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha); |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | // ---------------------------------------------------------------------------- |
| 1186 | // mask support |
| 1187 | // ---------------------------------------------------------------------------- |
| 1188 | |
| 1189 | void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b ) |
| 1190 | { |
| 1191 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1192 | |
| 1193 | M_IMGDATA->m_maskRed = r; |
| 1194 | M_IMGDATA->m_maskGreen = g; |
| 1195 | M_IMGDATA->m_maskBlue = b; |
| 1196 | M_IMGDATA->m_hasMask = true; |
| 1197 | } |
| 1198 | |
| 1199 | bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const |
| 1200 | { |
| 1201 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1202 | |
| 1203 | if (M_IMGDATA->m_hasMask) |
| 1204 | { |
| 1205 | if (r) *r = M_IMGDATA->m_maskRed; |
| 1206 | if (g) *g = M_IMGDATA->m_maskGreen; |
| 1207 | if (b) *b = M_IMGDATA->m_maskBlue; |
| 1208 | return true; |
| 1209 | } |
| 1210 | else |
| 1211 | { |
| 1212 | FindFirstUnusedColour(r, g, b); |
| 1213 | return false; |
| 1214 | } |
| 1215 | } |
| 1216 | |
| 1217 | unsigned char wxImage::GetMaskRed() const |
| 1218 | { |
| 1219 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 1220 | |
| 1221 | return M_IMGDATA->m_maskRed; |
| 1222 | } |
| 1223 | |
| 1224 | unsigned char wxImage::GetMaskGreen() const |
| 1225 | { |
| 1226 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 1227 | |
| 1228 | return M_IMGDATA->m_maskGreen; |
| 1229 | } |
| 1230 | |
| 1231 | unsigned char wxImage::GetMaskBlue() const |
| 1232 | { |
| 1233 | wxCHECK_MSG( Ok(), 0, wxT("invalid image") ); |
| 1234 | |
| 1235 | return M_IMGDATA->m_maskBlue; |
| 1236 | } |
| 1237 | |
| 1238 | void wxImage::SetMask( bool mask ) |
| 1239 | { |
| 1240 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1241 | |
| 1242 | M_IMGDATA->m_hasMask = mask; |
| 1243 | } |
| 1244 | |
| 1245 | bool wxImage::HasMask() const |
| 1246 | { |
| 1247 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1248 | |
| 1249 | return M_IMGDATA->m_hasMask; |
| 1250 | } |
| 1251 | |
| 1252 | bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const |
| 1253 | { |
| 1254 | long pos = XYToIndex(x, y); |
| 1255 | wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") ); |
| 1256 | |
| 1257 | // check mask |
| 1258 | if ( M_IMGDATA->m_hasMask ) |
| 1259 | { |
| 1260 | const unsigned char *p = M_IMGDATA->m_data + 3*pos; |
| 1261 | if ( p[0] == M_IMGDATA->m_maskRed && |
| 1262 | p[1] == M_IMGDATA->m_maskGreen && |
| 1263 | p[2] == M_IMGDATA->m_maskBlue ) |
| 1264 | { |
| 1265 | return true; |
| 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | // then check alpha |
| 1270 | if ( M_IMGDATA->m_alpha ) |
| 1271 | { |
| 1272 | if ( M_IMGDATA->m_alpha[pos] < threshold ) |
| 1273 | { |
| 1274 | // transparent enough |
| 1275 | return true; |
| 1276 | } |
| 1277 | } |
| 1278 | |
| 1279 | // not transparent |
| 1280 | return false; |
| 1281 | } |
| 1282 | |
| 1283 | bool wxImage::SetMaskFromImage(const wxImage& mask, |
| 1284 | unsigned char mr, unsigned char mg, unsigned char mb) |
| 1285 | { |
| 1286 | // check that the images are the same size |
| 1287 | if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) ) |
| 1288 | { |
| 1289 | wxLogError( _("Image and mask have different sizes.") ); |
| 1290 | return false; |
| 1291 | } |
| 1292 | |
| 1293 | // find unused colour |
| 1294 | unsigned char r,g,b ; |
| 1295 | if (!FindFirstUnusedColour(&r, &g, &b)) |
| 1296 | { |
| 1297 | wxLogError( _("No unused colour in image being masked.") ); |
| 1298 | return false ; |
| 1299 | } |
| 1300 | |
| 1301 | unsigned char *imgdata = GetData(); |
| 1302 | unsigned char *maskdata = mask.GetData(); |
| 1303 | |
| 1304 | const int w = GetWidth(); |
| 1305 | const int h = GetHeight(); |
| 1306 | |
| 1307 | for (int j = 0; j < h; j++) |
| 1308 | { |
| 1309 | for (int i = 0; i < w; i++) |
| 1310 | { |
| 1311 | if ((maskdata[0] == mr) && (maskdata[1] == mg) && (maskdata[2] == mb)) |
| 1312 | { |
| 1313 | imgdata[0] = r; |
| 1314 | imgdata[1] = g; |
| 1315 | imgdata[2] = b; |
| 1316 | } |
| 1317 | imgdata += 3; |
| 1318 | maskdata += 3; |
| 1319 | } |
| 1320 | } |
| 1321 | |
| 1322 | SetMaskColour(r, g, b); |
| 1323 | SetMask(true); |
| 1324 | |
| 1325 | return true; |
| 1326 | } |
| 1327 | |
| 1328 | bool wxImage::ConvertAlphaToMask(unsigned char threshold) |
| 1329 | { |
| 1330 | if (!HasAlpha()) |
| 1331 | return true; |
| 1332 | |
| 1333 | unsigned char mr, mg, mb; |
| 1334 | if (!FindFirstUnusedColour(&mr, &mg, &mb)) |
| 1335 | { |
| 1336 | wxLogError( _("No unused colour in image being masked.") ); |
| 1337 | return false; |
| 1338 | } |
| 1339 | |
| 1340 | SetMask(true); |
| 1341 | SetMaskColour(mr, mg, mb); |
| 1342 | |
| 1343 | unsigned char *imgdata = GetData(); |
| 1344 | unsigned char *alphadata = GetAlpha(); |
| 1345 | |
| 1346 | int w = GetWidth(); |
| 1347 | int h = GetHeight(); |
| 1348 | |
| 1349 | for (int y = 0; y < h; y++) |
| 1350 | { |
| 1351 | for (int x = 0; x < w; x++, imgdata += 3, alphadata++) |
| 1352 | { |
| 1353 | if (*alphadata < threshold) |
| 1354 | { |
| 1355 | imgdata[0] = mr; |
| 1356 | imgdata[1] = mg; |
| 1357 | imgdata[2] = mb; |
| 1358 | } |
| 1359 | } |
| 1360 | } |
| 1361 | |
| 1362 | free(M_IMGDATA->m_alpha); |
| 1363 | M_IMGDATA->m_alpha = NULL; |
| 1364 | |
| 1365 | return true; |
| 1366 | } |
| 1367 | |
| 1368 | // ---------------------------------------------------------------------------- |
| 1369 | // Palette functions |
| 1370 | // ---------------------------------------------------------------------------- |
| 1371 | |
| 1372 | #if wxUSE_PALETTE |
| 1373 | |
| 1374 | bool wxImage::HasPalette() const |
| 1375 | { |
| 1376 | if (!Ok()) |
| 1377 | return false; |
| 1378 | |
| 1379 | return M_IMGDATA->m_palette.Ok(); |
| 1380 | } |
| 1381 | |
| 1382 | const wxPalette& wxImage::GetPalette() const |
| 1383 | { |
| 1384 | wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") ); |
| 1385 | |
| 1386 | return M_IMGDATA->m_palette; |
| 1387 | } |
| 1388 | |
| 1389 | void wxImage::SetPalette(const wxPalette& palette) |
| 1390 | { |
| 1391 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1392 | |
| 1393 | M_IMGDATA->m_palette = palette; |
| 1394 | } |
| 1395 | |
| 1396 | #endif // wxUSE_PALETTE |
| 1397 | |
| 1398 | // ---------------------------------------------------------------------------- |
| 1399 | // Option functions (arbitrary name/value mapping) |
| 1400 | // ---------------------------------------------------------------------------- |
| 1401 | |
| 1402 | void wxImage::SetOption(const wxString& name, const wxString& value) |
| 1403 | { |
| 1404 | wxCHECK_RET( Ok(), wxT("invalid image") ); |
| 1405 | |
| 1406 | int idx = M_IMGDATA->m_optionNames.Index(name, false); |
| 1407 | if (idx == wxNOT_FOUND) |
| 1408 | { |
| 1409 | M_IMGDATA->m_optionNames.Add(name); |
| 1410 | M_IMGDATA->m_optionValues.Add(value); |
| 1411 | } |
| 1412 | else |
| 1413 | { |
| 1414 | M_IMGDATA->m_optionNames[idx] = name; |
| 1415 | M_IMGDATA->m_optionValues[idx] = value; |
| 1416 | } |
| 1417 | } |
| 1418 | |
| 1419 | void wxImage::SetOption(const wxString& name, int value) |
| 1420 | { |
| 1421 | wxString valStr; |
| 1422 | valStr.Printf(wxT("%d"), value); |
| 1423 | SetOption(name, valStr); |
| 1424 | } |
| 1425 | |
| 1426 | wxString wxImage::GetOption(const wxString& name) const |
| 1427 | { |
| 1428 | wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") ); |
| 1429 | |
| 1430 | int idx = M_IMGDATA->m_optionNames.Index(name, false); |
| 1431 | if (idx == wxNOT_FOUND) |
| 1432 | return wxEmptyString; |
| 1433 | else |
| 1434 | return M_IMGDATA->m_optionValues[idx]; |
| 1435 | } |
| 1436 | |
| 1437 | int wxImage::GetOptionInt(const wxString& name) const |
| 1438 | { |
| 1439 | return wxAtoi(GetOption(name)); |
| 1440 | } |
| 1441 | |
| 1442 | bool wxImage::HasOption(const wxString& name) const |
| 1443 | { |
| 1444 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1445 | |
| 1446 | return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND); |
| 1447 | } |
| 1448 | |
| 1449 | // ---------------------------------------------------------------------------- |
| 1450 | // image I/O |
| 1451 | // ---------------------------------------------------------------------------- |
| 1452 | |
| 1453 | bool wxImage::LoadFile( const wxString& filename, long type, int index ) |
| 1454 | { |
| 1455 | #if wxUSE_STREAMS |
| 1456 | if (wxFileExists(filename)) |
| 1457 | { |
| 1458 | wxFileInputStream stream(filename); |
| 1459 | wxBufferedInputStream bstream( stream ); |
| 1460 | return LoadFile(bstream, type, index); |
| 1461 | } |
| 1462 | else |
| 1463 | { |
| 1464 | wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); |
| 1465 | |
| 1466 | return false; |
| 1467 | } |
| 1468 | #else // !wxUSE_STREAMS |
| 1469 | return false; |
| 1470 | #endif // wxUSE_STREAMS |
| 1471 | } |
| 1472 | |
| 1473 | bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int index ) |
| 1474 | { |
| 1475 | #if wxUSE_STREAMS |
| 1476 | if (wxFileExists(filename)) |
| 1477 | { |
| 1478 | wxFileInputStream stream(filename); |
| 1479 | wxBufferedInputStream bstream( stream ); |
| 1480 | return LoadFile(bstream, mimetype, index); |
| 1481 | } |
| 1482 | else |
| 1483 | { |
| 1484 | wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() ); |
| 1485 | |
| 1486 | return false; |
| 1487 | } |
| 1488 | #else // !wxUSE_STREAMS |
| 1489 | return false; |
| 1490 | #endif // wxUSE_STREAMS |
| 1491 | } |
| 1492 | |
| 1493 | |
| 1494 | |
| 1495 | bool wxImage::SaveFile( const wxString& filename ) const |
| 1496 | { |
| 1497 | wxString ext = filename.AfterLast('.').Lower(); |
| 1498 | |
| 1499 | wxImageHandler * pHandler = FindHandler(ext, -1); |
| 1500 | if (pHandler) |
| 1501 | { |
| 1502 | SaveFile(filename, pHandler->GetType()); |
| 1503 | return true; |
| 1504 | } |
| 1505 | |
| 1506 | wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str()); |
| 1507 | |
| 1508 | return false; |
| 1509 | } |
| 1510 | |
| 1511 | bool wxImage::SaveFile( const wxString& filename, int type ) const |
| 1512 | { |
| 1513 | #if wxUSE_STREAMS |
| 1514 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1515 | |
| 1516 | ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); |
| 1517 | |
| 1518 | wxFileOutputStream stream(filename); |
| 1519 | |
| 1520 | if ( stream.IsOk() ) |
| 1521 | { |
| 1522 | wxBufferedOutputStream bstream( stream ); |
| 1523 | return SaveFile(bstream, type); |
| 1524 | } |
| 1525 | #endif // wxUSE_STREAMS |
| 1526 | |
| 1527 | return false; |
| 1528 | } |
| 1529 | |
| 1530 | bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) const |
| 1531 | { |
| 1532 | #if wxUSE_STREAMS |
| 1533 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1534 | |
| 1535 | ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename); |
| 1536 | |
| 1537 | wxFileOutputStream stream(filename); |
| 1538 | |
| 1539 | if ( stream.IsOk() ) |
| 1540 | { |
| 1541 | wxBufferedOutputStream bstream( stream ); |
| 1542 | return SaveFile(bstream, mimetype); |
| 1543 | } |
| 1544 | #endif // wxUSE_STREAMS |
| 1545 | |
| 1546 | return false; |
| 1547 | } |
| 1548 | |
| 1549 | bool wxImage::CanRead( const wxString &name ) |
| 1550 | { |
| 1551 | #if wxUSE_STREAMS |
| 1552 | wxFileInputStream stream(name); |
| 1553 | return CanRead(stream); |
| 1554 | #else |
| 1555 | return false; |
| 1556 | #endif |
| 1557 | } |
| 1558 | |
| 1559 | int wxImage::GetImageCount( const wxString &name, long type ) |
| 1560 | { |
| 1561 | #if wxUSE_STREAMS |
| 1562 | wxFileInputStream stream(name); |
| 1563 | if (stream.Ok()) |
| 1564 | return GetImageCount(stream, type); |
| 1565 | #endif |
| 1566 | |
| 1567 | return 0; |
| 1568 | } |
| 1569 | |
| 1570 | #if wxUSE_STREAMS |
| 1571 | |
| 1572 | bool wxImage::CanRead( wxInputStream &stream ) |
| 1573 | { |
| 1574 | const wxList& list = GetHandlers(); |
| 1575 | |
| 1576 | for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) |
| 1577 | { |
| 1578 | wxImageHandler *handler=(wxImageHandler*)node->GetData(); |
| 1579 | if (handler->CanRead( stream )) |
| 1580 | return true; |
| 1581 | } |
| 1582 | |
| 1583 | return false; |
| 1584 | } |
| 1585 | |
| 1586 | int wxImage::GetImageCount( wxInputStream &stream, long type ) |
| 1587 | { |
| 1588 | wxImageHandler *handler; |
| 1589 | |
| 1590 | if ( type == wxBITMAP_TYPE_ANY ) |
| 1591 | { |
| 1592 | wxList &list=GetHandlers(); |
| 1593 | |
| 1594 | for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext()) |
| 1595 | { |
| 1596 | handler=(wxImageHandler*)node->GetData(); |
| 1597 | if ( handler->CanRead(stream) ) |
| 1598 | return handler->GetImageCount(stream); |
| 1599 | |
| 1600 | } |
| 1601 | |
| 1602 | wxLogWarning(_("No handler found for image type.")); |
| 1603 | return 0; |
| 1604 | } |
| 1605 | |
| 1606 | handler = FindHandler(type); |
| 1607 | |
| 1608 | if ( !handler ) |
| 1609 | { |
| 1610 | wxLogWarning(_("No image handler for type %d defined."), type); |
| 1611 | return false; |
| 1612 | } |
| 1613 | |
| 1614 | if ( handler->CanRead(stream) ) |
| 1615 | { |
| 1616 | return handler->GetImageCount(stream); |
| 1617 | } |
| 1618 | else |
| 1619 | { |
| 1620 | wxLogError(_("Image file is not of type %d."), type); |
| 1621 | return 0; |
| 1622 | } |
| 1623 | } |
| 1624 | |
| 1625 | bool wxImage::LoadFile( wxInputStream& stream, long type, int index ) |
| 1626 | { |
| 1627 | UnRef(); |
| 1628 | |
| 1629 | m_refData = new wxImageRefData; |
| 1630 | |
| 1631 | wxImageHandler *handler; |
| 1632 | |
| 1633 | if ( type == wxBITMAP_TYPE_ANY ) |
| 1634 | { |
| 1635 | wxList &list=GetHandlers(); |
| 1636 | |
| 1637 | for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) |
| 1638 | { |
| 1639 | handler=(wxImageHandler*)node->GetData(); |
| 1640 | if ( handler->CanRead(stream) ) |
| 1641 | return handler->LoadFile(this, stream, true/*verbose*/, index); |
| 1642 | |
| 1643 | } |
| 1644 | |
| 1645 | wxLogWarning( _("No handler found for image type.") ); |
| 1646 | return false; |
| 1647 | } |
| 1648 | |
| 1649 | handler = FindHandler(type); |
| 1650 | |
| 1651 | if (handler == 0) |
| 1652 | { |
| 1653 | wxLogWarning( _("No image handler for type %d defined."), type ); |
| 1654 | |
| 1655 | return false; |
| 1656 | } |
| 1657 | |
| 1658 | if (stream.IsSeekable() && !handler->CanRead(stream)) |
| 1659 | { |
| 1660 | wxLogError(_("Image file is not of type %d."), type); |
| 1661 | return false; |
| 1662 | } |
| 1663 | else |
| 1664 | return handler->LoadFile(this, stream, true/*verbose*/, index); |
| 1665 | } |
| 1666 | |
| 1667 | bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index ) |
| 1668 | { |
| 1669 | UnRef(); |
| 1670 | |
| 1671 | m_refData = new wxImageRefData; |
| 1672 | |
| 1673 | wxImageHandler *handler = FindHandlerMime(mimetype); |
| 1674 | |
| 1675 | if (handler == 0) |
| 1676 | { |
| 1677 | wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); |
| 1678 | |
| 1679 | return false; |
| 1680 | } |
| 1681 | |
| 1682 | if (stream.IsSeekable() && !handler->CanRead(stream)) |
| 1683 | { |
| 1684 | wxLogError(_("Image file is not of type %s."), (const wxChar*) mimetype); |
| 1685 | return false; |
| 1686 | } |
| 1687 | else |
| 1688 | return handler->LoadFile( this, stream, true/*verbose*/, index ); |
| 1689 | } |
| 1690 | |
| 1691 | bool wxImage::SaveFile( wxOutputStream& stream, int type ) const |
| 1692 | { |
| 1693 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1694 | |
| 1695 | wxImageHandler *handler = FindHandler(type); |
| 1696 | if ( !handler ) |
| 1697 | { |
| 1698 | wxLogWarning( _("No image handler for type %d defined."), type ); |
| 1699 | |
| 1700 | return false; |
| 1701 | } |
| 1702 | |
| 1703 | return handler->SaveFile( (wxImage*)this, stream ); |
| 1704 | } |
| 1705 | |
| 1706 | bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const |
| 1707 | { |
| 1708 | wxCHECK_MSG( Ok(), false, wxT("invalid image") ); |
| 1709 | |
| 1710 | wxImageHandler *handler = FindHandlerMime(mimetype); |
| 1711 | if ( !handler ) |
| 1712 | { |
| 1713 | wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() ); |
| 1714 | |
| 1715 | return false; |
| 1716 | } |
| 1717 | |
| 1718 | return handler->SaveFile( (wxImage*)this, stream ); |
| 1719 | } |
| 1720 | #endif // wxUSE_STREAMS |
| 1721 | |
| 1722 | // ---------------------------------------------------------------------------- |
| 1723 | // image I/O handlers |
| 1724 | // ---------------------------------------------------------------------------- |
| 1725 | |
| 1726 | void wxImage::AddHandler( wxImageHandler *handler ) |
| 1727 | { |
| 1728 | // Check for an existing handler of the type being added. |
| 1729 | if (FindHandler( handler->GetType() ) == 0) |
| 1730 | { |
| 1731 | sm_handlers.Append( handler ); |
| 1732 | } |
| 1733 | else |
| 1734 | { |
| 1735 | // This is not documented behaviour, merely the simplest 'fix' |
| 1736 | // for preventing duplicate additions. If someone ever has |
| 1737 | // a good reason to add and remove duplicate handlers (and they |
| 1738 | // may) we should probably refcount the duplicates. |
| 1739 | // also an issue in InsertHandler below. |
| 1740 | |
| 1741 | wxLogDebug( _T("Adding duplicate image handler for '%s'"), |
| 1742 | handler->GetName().c_str() ); |
| 1743 | delete handler; |
| 1744 | } |
| 1745 | } |
| 1746 | |
| 1747 | void wxImage::InsertHandler( wxImageHandler *handler ) |
| 1748 | { |
| 1749 | // Check for an existing handler of the type being added. |
| 1750 | if (FindHandler( handler->GetType() ) == 0) |
| 1751 | { |
| 1752 | sm_handlers.Insert( handler ); |
| 1753 | } |
| 1754 | else |
| 1755 | { |
| 1756 | // see AddHandler for additional comments. |
| 1757 | wxLogDebug( _T("Inserting duplicate image handler for '%s'"), |
| 1758 | handler->GetName().c_str() ); |
| 1759 | delete handler; |
| 1760 | } |
| 1761 | } |
| 1762 | |
| 1763 | bool wxImage::RemoveHandler( const wxString& name ) |
| 1764 | { |
| 1765 | wxImageHandler *handler = FindHandler(name); |
| 1766 | if (handler) |
| 1767 | { |
| 1768 | sm_handlers.DeleteObject(handler); |
| 1769 | delete handler; |
| 1770 | return true; |
| 1771 | } |
| 1772 | else |
| 1773 | return false; |
| 1774 | } |
| 1775 | |
| 1776 | wxImageHandler *wxImage::FindHandler( const wxString& name ) |
| 1777 | { |
| 1778 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 1779 | while (node) |
| 1780 | { |
| 1781 | wxImageHandler *handler = (wxImageHandler*)node->GetData(); |
| 1782 | if (handler->GetName().Cmp(name) == 0) return handler; |
| 1783 | |
| 1784 | node = node->GetNext(); |
| 1785 | } |
| 1786 | return 0; |
| 1787 | } |
| 1788 | |
| 1789 | wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType ) |
| 1790 | { |
| 1791 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 1792 | while (node) |
| 1793 | { |
| 1794 | wxImageHandler *handler = (wxImageHandler*)node->GetData(); |
| 1795 | if ( (handler->GetExtension().Cmp(extension) == 0) && |
| 1796 | (bitmapType == -1 || handler->GetType() == bitmapType) ) |
| 1797 | return handler; |
| 1798 | node = node->GetNext(); |
| 1799 | } |
| 1800 | return 0; |
| 1801 | } |
| 1802 | |
| 1803 | wxImageHandler *wxImage::FindHandler( long bitmapType ) |
| 1804 | { |
| 1805 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 1806 | while (node) |
| 1807 | { |
| 1808 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); |
| 1809 | if (handler->GetType() == bitmapType) return handler; |
| 1810 | node = node->GetNext(); |
| 1811 | } |
| 1812 | return 0; |
| 1813 | } |
| 1814 | |
| 1815 | wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype ) |
| 1816 | { |
| 1817 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 1818 | while (node) |
| 1819 | { |
| 1820 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); |
| 1821 | if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler; |
| 1822 | node = node->GetNext(); |
| 1823 | } |
| 1824 | return 0; |
| 1825 | } |
| 1826 | |
| 1827 | void wxImage::InitStandardHandlers() |
| 1828 | { |
| 1829 | #if wxUSE_STREAMS |
| 1830 | AddHandler(new wxBMPHandler); |
| 1831 | #endif // wxUSE_STREAMS |
| 1832 | } |
| 1833 | |
| 1834 | void wxImage::CleanUpHandlers() |
| 1835 | { |
| 1836 | wxList::compatibility_iterator node = sm_handlers.GetFirst(); |
| 1837 | while (node) |
| 1838 | { |
| 1839 | wxImageHandler *handler = (wxImageHandler *)node->GetData(); |
| 1840 | wxList::compatibility_iterator next = node->GetNext(); |
| 1841 | delete handler; |
| 1842 | node = next; |
| 1843 | } |
| 1844 | |
| 1845 | sm_handlers.Clear(); |
| 1846 | } |
| 1847 | |
| 1848 | wxString wxImage::GetImageExtWildcard() |
| 1849 | { |
| 1850 | wxString fmts; |
| 1851 | |
| 1852 | wxList& Handlers = wxImage::GetHandlers(); |
| 1853 | wxList::compatibility_iterator Node = Handlers.GetFirst(); |
| 1854 | while ( Node ) |
| 1855 | { |
| 1856 | wxImageHandler* Handler = (wxImageHandler*)Node->GetData(); |
| 1857 | fmts += wxT("*.") + Handler->GetExtension(); |
| 1858 | Node = Node->GetNext(); |
| 1859 | if ( Node ) fmts += wxT(";"); |
| 1860 | } |
| 1861 | |
| 1862 | return wxT("(") + fmts + wxT(")|") + fmts; |
| 1863 | } |
| 1864 | |
| 1865 | wxImage::HSVValue wxImage::RGBtoHSV(const RGBValue& rgb) |
| 1866 | { |
| 1867 | const double red = rgb.red / 255.0, |
| 1868 | green = rgb.green / 255.0, |
| 1869 | blue = rgb.blue / 255.0; |
| 1870 | |
| 1871 | // find the min and max intensity (and remember which one was it for the |
| 1872 | // latter) |
| 1873 | double minimumRGB = red; |
| 1874 | if ( green < minimumRGB ) |
| 1875 | minimumRGB = green; |
| 1876 | if ( blue < minimumRGB ) |
| 1877 | minimumRGB = blue; |
| 1878 | |
| 1879 | enum { RED, GREEN, BLUE } chMax = RED; |
| 1880 | double maximumRGB = red; |
| 1881 | if ( green > maximumRGB ) |
| 1882 | { |
| 1883 | chMax = GREEN; |
| 1884 | maximumRGB = green; |
| 1885 | } |
| 1886 | if ( blue > maximumRGB ) |
| 1887 | { |
| 1888 | chMax = BLUE; |
| 1889 | maximumRGB = blue; |
| 1890 | } |
| 1891 | |
| 1892 | const double value = maximumRGB; |
| 1893 | |
| 1894 | double hue = 0.0, saturation; |
| 1895 | const double deltaRGB = maximumRGB - minimumRGB; |
| 1896 | if ( wxIsNullDouble(deltaRGB) ) |
| 1897 | { |
| 1898 | // Gray has no color |
| 1899 | hue = 0.0; |
| 1900 | saturation = 0.0; |
| 1901 | } |
| 1902 | else |
| 1903 | { |
| 1904 | switch ( chMax ) |
| 1905 | { |
| 1906 | case RED: |
| 1907 | hue = (green - blue) / deltaRGB; |
| 1908 | break; |
| 1909 | |
| 1910 | case GREEN: |
| 1911 | hue = 2.0 + (blue - red) / deltaRGB; |
| 1912 | break; |
| 1913 | |
| 1914 | case BLUE: |
| 1915 | hue = 4.0 + (red - green) / deltaRGB; |
| 1916 | break; |
| 1917 | |
| 1918 | default: |
| 1919 | wxFAIL_MSG(wxT("hue not specified")); |
| 1920 | break; |
| 1921 | } |
| 1922 | |
| 1923 | hue /= 6.0; |
| 1924 | |
| 1925 | if ( hue < 0.0 ) |
| 1926 | hue += 1.0; |
| 1927 | |
| 1928 | saturation = deltaRGB / maximumRGB; |
| 1929 | } |
| 1930 | |
| 1931 | return HSVValue(hue, saturation, value); |
| 1932 | } |
| 1933 | |
| 1934 | wxImage::RGBValue wxImage::HSVtoRGB(const HSVValue& hsv) |
| 1935 | { |
| 1936 | double red, green, blue; |
| 1937 | |
| 1938 | if ( wxIsNullDouble(hsv.saturation) ) |
| 1939 | { |
| 1940 | // Grey |
| 1941 | red = hsv.value; |
| 1942 | green = hsv.value; |
| 1943 | blue = hsv.value; |
| 1944 | } |
| 1945 | else // not grey |
| 1946 | { |
| 1947 | double hue = hsv.hue * 6.0; // sector 0 to 5 |
| 1948 | int i = (int)floor(hue); |
| 1949 | double f = hue - i; // fractional part of h |
| 1950 | double p = hsv.value * (1.0 - hsv.saturation); |
| 1951 | |
| 1952 | switch (i) |
| 1953 | { |
| 1954 | case 0: |
| 1955 | red = hsv.value; |
| 1956 | green = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); |
| 1957 | blue = p; |
| 1958 | break; |
| 1959 | |
| 1960 | case 1: |
| 1961 | red = hsv.value * (1.0 - hsv.saturation * f); |
| 1962 | green = hsv.value; |
| 1963 | blue = p; |
| 1964 | break; |
| 1965 | |
| 1966 | case 2: |
| 1967 | red = p; |
| 1968 | green = hsv.value; |
| 1969 | blue = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); |
| 1970 | break; |
| 1971 | |
| 1972 | case 3: |
| 1973 | red = p; |
| 1974 | green = hsv.value * (1.0 - hsv.saturation * f); |
| 1975 | blue = hsv.value; |
| 1976 | break; |
| 1977 | |
| 1978 | case 4: |
| 1979 | red = hsv.value * (1.0 - hsv.saturation * (1.0 - f)); |
| 1980 | green = p; |
| 1981 | blue = hsv.value; |
| 1982 | break; |
| 1983 | |
| 1984 | default: // case 5: |
| 1985 | red = hsv.value; |
| 1986 | green = p; |
| 1987 | blue = hsv.value * (1.0 - hsv.saturation * f); |
| 1988 | break; |
| 1989 | } |
| 1990 | } |
| 1991 | |
| 1992 | return RGBValue((unsigned char)(red * 255.0), |
| 1993 | (unsigned char)(green * 255.0), |
| 1994 | (unsigned char)(blue * 255.0)); |
| 1995 | } |
| 1996 | |
| 1997 | /* |
| 1998 | * Rotates the hue of each pixel of the image. angle is a double in the range |
| 1999 | * -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees |
| 2000 | */ |
| 2001 | void wxImage::RotateHue(double angle) |
| 2002 | { |
| 2003 | unsigned char *srcBytePtr; |
| 2004 | unsigned char *dstBytePtr; |
| 2005 | unsigned long count; |
| 2006 | wxImage::HSVValue hsv; |
| 2007 | wxImage::RGBValue rgb; |
| 2008 | |
| 2009 | wxASSERT (angle >= -1.0 && angle <= 1.0); |
| 2010 | count = M_IMGDATA->m_width * M_IMGDATA->m_height; |
| 2011 | if ( count > 0 && !wxIsNullDouble(angle) ) |
| 2012 | { |
| 2013 | srcBytePtr = M_IMGDATA->m_data; |
| 2014 | dstBytePtr = srcBytePtr; |
| 2015 | do |
| 2016 | { |
| 2017 | rgb.red = *srcBytePtr++; |
| 2018 | rgb.green = *srcBytePtr++; |
| 2019 | rgb.blue = *srcBytePtr++; |
| 2020 | hsv = RGBtoHSV(rgb); |
| 2021 | |
| 2022 | hsv.hue = hsv.hue + angle; |
| 2023 | if (hsv.hue > 1.0) |
| 2024 | hsv.hue = hsv.hue - 1.0; |
| 2025 | else if (hsv.hue < 0.0) |
| 2026 | hsv.hue = hsv.hue + 1.0; |
| 2027 | |
| 2028 | rgb = HSVtoRGB(hsv); |
| 2029 | *dstBytePtr++ = rgb.red; |
| 2030 | *dstBytePtr++ = rgb.green; |
| 2031 | *dstBytePtr++ = rgb.blue; |
| 2032 | } while (--count != 0); |
| 2033 | } |
| 2034 | } |
| 2035 | |
| 2036 | //----------------------------------------------------------------------------- |
| 2037 | // wxImageHandler |
| 2038 | //----------------------------------------------------------------------------- |
| 2039 | |
| 2040 | IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject) |
| 2041 | |
| 2042 | #if wxUSE_STREAMS |
| 2043 | bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) ) |
| 2044 | { |
| 2045 | return false; |
| 2046 | } |
| 2047 | |
| 2048 | bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) ) |
| 2049 | { |
| 2050 | return false; |
| 2051 | } |
| 2052 | |
| 2053 | int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) ) |
| 2054 | { |
| 2055 | return 1; |
| 2056 | } |
| 2057 | |
| 2058 | bool wxImageHandler::CanRead( const wxString& name ) |
| 2059 | { |
| 2060 | if (wxFileExists(name)) |
| 2061 | { |
| 2062 | wxFileInputStream stream(name); |
| 2063 | return CanRead(stream); |
| 2064 | } |
| 2065 | |
| 2066 | wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() ); |
| 2067 | |
| 2068 | return false; |
| 2069 | } |
| 2070 | |
| 2071 | bool wxImageHandler::CallDoCanRead(wxInputStream& stream) |
| 2072 | { |
| 2073 | wxFileOffset posOld = stream.TellI(); |
| 2074 | if ( posOld == wxInvalidOffset ) |
| 2075 | { |
| 2076 | // can't test unseekable stream |
| 2077 | return false; |
| 2078 | } |
| 2079 | |
| 2080 | bool ok = DoCanRead(stream); |
| 2081 | |
| 2082 | // restore the old position to be able to test other formats and so on |
| 2083 | if ( stream.SeekI(posOld) == wxInvalidOffset ) |
| 2084 | { |
| 2085 | wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!")); |
| 2086 | |
| 2087 | // reading would fail anyhow as we're not at the right position |
| 2088 | return false; |
| 2089 | } |
| 2090 | |
| 2091 | return ok; |
| 2092 | } |
| 2093 | |
| 2094 | #endif // wxUSE_STREAMS |
| 2095 | |
| 2096 | // ---------------------------------------------------------------------------- |
| 2097 | // image histogram stuff |
| 2098 | // ---------------------------------------------------------------------------- |
| 2099 | |
| 2100 | bool |
| 2101 | wxImageHistogram::FindFirstUnusedColour(unsigned char *r, |
| 2102 | unsigned char *g, |
| 2103 | unsigned char *b, |
| 2104 | unsigned char r2, |
| 2105 | unsigned char b2, |
| 2106 | unsigned char g2) const |
| 2107 | { |
| 2108 | unsigned long key = MakeKey(r2, g2, b2); |
| 2109 | |
| 2110 | while ( find(key) != end() ) |
| 2111 | { |
| 2112 | // color already used |
| 2113 | r2++; |
| 2114 | if ( r2 >= 255 ) |
| 2115 | { |
| 2116 | r2 = 0; |
| 2117 | g2++; |
| 2118 | if ( g2 >= 255 ) |
| 2119 | { |
| 2120 | g2 = 0; |
| 2121 | b2++; |
| 2122 | if ( b2 >= 255 ) |
| 2123 | { |
| 2124 | wxLogError(_("No unused colour in image.") ); |
| 2125 | return false; |
| 2126 | } |
| 2127 | } |
| 2128 | } |
| 2129 | |
| 2130 | key = MakeKey(r2, g2, b2); |
| 2131 | } |
| 2132 | |
| 2133 | if ( r ) |
| 2134 | *r = r2; |
| 2135 | if ( g ) |
| 2136 | *g = g2; |
| 2137 | if ( b ) |
| 2138 | *b = b2; |
| 2139 | |
| 2140 | return true; |
| 2141 | } |
| 2142 | |
| 2143 | bool |
| 2144 | wxImage::FindFirstUnusedColour(unsigned char *r, |
| 2145 | unsigned char *g, |
| 2146 | unsigned char *b, |
| 2147 | unsigned char r2, |
| 2148 | unsigned char b2, |
| 2149 | unsigned char g2) const |
| 2150 | { |
| 2151 | wxImageHistogram histogram; |
| 2152 | |
| 2153 | ComputeHistogram(histogram); |
| 2154 | |
| 2155 | return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2); |
| 2156 | } |
| 2157 | |
| 2158 | |
| 2159 | |
| 2160 | // GRG, Dic/99 |
| 2161 | // Counts and returns the number of different colours. Optionally stops |
| 2162 | // when it exceeds 'stopafter' different colours. This is useful, for |
| 2163 | // example, to see if the image can be saved as 8-bit (256 colour or |
| 2164 | // less, in this case it would be invoked as CountColours(256)). Default |
| 2165 | // value for stopafter is -1 (don't care). |
| 2166 | // |
| 2167 | unsigned long wxImage::CountColours( unsigned long stopafter ) const |
| 2168 | { |
| 2169 | wxHashTable h; |
| 2170 | wxObject dummy; |
| 2171 | unsigned char r, g, b; |
| 2172 | unsigned char *p; |
| 2173 | unsigned long size, nentries, key; |
| 2174 | |
| 2175 | p = GetData(); |
| 2176 | size = GetWidth() * GetHeight(); |
| 2177 | nentries = 0; |
| 2178 | |
| 2179 | for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++) |
| 2180 | { |
| 2181 | r = *(p++); |
| 2182 | g = *(p++); |
| 2183 | b = *(p++); |
| 2184 | key = wxImageHistogram::MakeKey(r, g, b); |
| 2185 | |
| 2186 | if (h.Get(key) == NULL) |
| 2187 | { |
| 2188 | h.Put(key, &dummy); |
| 2189 | nentries++; |
| 2190 | } |
| 2191 | } |
| 2192 | |
| 2193 | return nentries; |
| 2194 | } |
| 2195 | |
| 2196 | |
| 2197 | unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const |
| 2198 | { |
| 2199 | unsigned char *p = GetData(); |
| 2200 | unsigned long nentries = 0; |
| 2201 | |
| 2202 | h.clear(); |
| 2203 | |
| 2204 | const unsigned long size = GetWidth() * GetHeight(); |
| 2205 | |
| 2206 | unsigned char r, g, b; |
| 2207 | for ( unsigned long n = 0; n < size; n++ ) |
| 2208 | { |
| 2209 | r = *p++; |
| 2210 | g = *p++; |
| 2211 | b = *p++; |
| 2212 | |
| 2213 | wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)]; |
| 2214 | |
| 2215 | if ( entry.value++ == 0 ) |
| 2216 | entry.index = nentries++; |
| 2217 | } |
| 2218 | |
| 2219 | return nentries; |
| 2220 | } |
| 2221 | |
| 2222 | /* |
| 2223 | * Rotation code by Carlos Moreno |
| 2224 | */ |
| 2225 | |
| 2226 | // GRG: I've removed wxRotationPoint - we already have wxRealPoint which |
| 2227 | // does exactly the same thing. And I also got rid of wxRotationPixel |
| 2228 | // bacause of potential problems in architectures where alignment |
| 2229 | // is an issue, so I had to rewrite parts of the code. |
| 2230 | |
| 2231 | static const double gs_Epsilon = 1e-10; |
| 2232 | |
| 2233 | static inline int wxCint (double x) |
| 2234 | { |
| 2235 | return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5); |
| 2236 | } |
| 2237 | |
| 2238 | |
| 2239 | // Auxiliary function to rotate a point (x,y) with respect to point p0 |
| 2240 | // make it inline and use a straight return to facilitate optimization |
| 2241 | // also, the function receives the sine and cosine of the angle to avoid |
| 2242 | // repeating the time-consuming calls to these functions -- sin/cos can |
| 2243 | // be computed and stored in the calling function. |
| 2244 | |
| 2245 | inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0) |
| 2246 | { |
| 2247 | return wxRealPoint (p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle, |
| 2248 | p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle); |
| 2249 | } |
| 2250 | |
| 2251 | inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0) |
| 2252 | { |
| 2253 | return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0); |
| 2254 | } |
| 2255 | |
| 2256 | wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const |
| 2257 | { |
| 2258 | int i; |
| 2259 | angle = -angle; // screen coordinates are a mirror image of "real" coordinates |
| 2260 | |
| 2261 | bool has_alpha = HasAlpha(); |
| 2262 | |
| 2263 | // Create pointer-based array to accelerate access to wxImage's data |
| 2264 | unsigned char ** data = new unsigned char * [GetHeight()]; |
| 2265 | data[0] = GetData(); |
| 2266 | for (i = 1; i < GetHeight(); i++) |
| 2267 | data[i] = data[i - 1] + (3 * GetWidth()); |
| 2268 | |
| 2269 | // Same for alpha channel |
| 2270 | unsigned char ** alpha = NULL; |
| 2271 | if (has_alpha) |
| 2272 | { |
| 2273 | alpha = new unsigned char * [GetHeight()]; |
| 2274 | alpha[0] = GetAlpha(); |
| 2275 | for (i = 1; i < GetHeight(); i++) |
| 2276 | alpha[i] = alpha[i - 1] + GetWidth(); |
| 2277 | } |
| 2278 | |
| 2279 | // precompute coefficients for rotation formula |
| 2280 | // (sine and cosine of the angle) |
| 2281 | const double cos_angle = cos(angle); |
| 2282 | const double sin_angle = sin(angle); |
| 2283 | |
| 2284 | // Create new Image to store the result |
| 2285 | // First, find rectangle that covers the rotated image; to do that, |
| 2286 | // rotate the four corners |
| 2287 | |
| 2288 | const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y); |
| 2289 | |
| 2290 | wxRealPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0); |
| 2291 | wxRealPoint p2 = rotated_point (0, GetHeight(), cos_angle, sin_angle, p0); |
| 2292 | wxRealPoint p3 = rotated_point (GetWidth(), 0, cos_angle, sin_angle, p0); |
| 2293 | wxRealPoint p4 = rotated_point (GetWidth(), GetHeight(), cos_angle, sin_angle, p0); |
| 2294 | |
| 2295 | int x1a = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x))); |
| 2296 | int y1a = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y))); |
| 2297 | int x2a = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x))); |
| 2298 | int y2a = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y))); |
| 2299 | |
| 2300 | // Create rotated image |
| 2301 | wxImage rotated (x2a - x1a + 1, y2a - y1a + 1, false); |
| 2302 | // With alpha channel |
| 2303 | if (has_alpha) |
| 2304 | rotated.SetAlpha(); |
| 2305 | |
| 2306 | if (offset_after_rotation != NULL) |
| 2307 | { |
| 2308 | *offset_after_rotation = wxPoint (x1a, y1a); |
| 2309 | } |
| 2310 | |
| 2311 | // GRG: The rotated (destination) image is always accessed |
| 2312 | // sequentially, so there is no need for a pointer-based |
| 2313 | // array here (and in fact it would be slower). |
| 2314 | // |
| 2315 | unsigned char * dst = rotated.GetData(); |
| 2316 | |
| 2317 | unsigned char * alpha_dst = NULL; |
| 2318 | if (has_alpha) |
| 2319 | alpha_dst = rotated.GetAlpha(); |
| 2320 | |
| 2321 | // GRG: if the original image has a mask, use its RGB values |
| 2322 | // as the blank pixel, else, fall back to default (black). |
| 2323 | // |
| 2324 | unsigned char blank_r = 0; |
| 2325 | unsigned char blank_g = 0; |
| 2326 | unsigned char blank_b = 0; |
| 2327 | |
| 2328 | if (HasMask()) |
| 2329 | { |
| 2330 | blank_r = GetMaskRed(); |
| 2331 | blank_g = GetMaskGreen(); |
| 2332 | blank_b = GetMaskBlue(); |
| 2333 | rotated.SetMaskColour( blank_r, blank_g, blank_b ); |
| 2334 | } |
| 2335 | |
| 2336 | // Now, for each point of the rotated image, find where it came from, by |
| 2337 | // performing an inverse rotation (a rotation of -angle) and getting the |
| 2338 | // pixel at those coordinates |
| 2339 | |
| 2340 | // GRG: I've taken the (interpolating) test out of the loops, so that |
| 2341 | // it is done only once, instead of repeating it for each pixel. |
| 2342 | |
| 2343 | int x; |
| 2344 | if (interpolating) |
| 2345 | { |
| 2346 | for (int y = 0; y < rotated.GetHeight(); y++) |
| 2347 | { |
| 2348 | for (x = 0; x < rotated.GetWidth(); x++) |
| 2349 | { |
| 2350 | wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0); |
| 2351 | |
| 2352 | if (-0.25 < src.x && src.x < GetWidth() - 0.75 && |
| 2353 | -0.25 < src.y && src.y < GetHeight() - 0.75) |
| 2354 | { |
| 2355 | // interpolate using the 4 enclosing grid-points. Those |
| 2356 | // points can be obtained using floor and ceiling of the |
| 2357 | // exact coordinates of the point |
| 2358 | int x1, y1, x2, y2; |
| 2359 | |
| 2360 | if (0 < src.x && src.x < GetWidth() - 1) |
| 2361 | { |
| 2362 | x1 = wxCint(floor(src.x)); |
| 2363 | x2 = wxCint(ceil(src.x)); |
| 2364 | } |
| 2365 | else // else means that x is near one of the borders (0 or width-1) |
| 2366 | { |
| 2367 | x1 = x2 = wxCint (src.x); |
| 2368 | } |
| 2369 | |
| 2370 | if (0 < src.y && src.y < GetHeight() - 1) |
| 2371 | { |
| 2372 | y1 = wxCint(floor(src.y)); |
| 2373 | y2 = wxCint(ceil(src.y)); |
| 2374 | } |
| 2375 | else |
| 2376 | { |
| 2377 | y1 = y2 = wxCint (src.y); |
| 2378 | } |
| 2379 | |
| 2380 | // get four points and the distances (square of the distance, |
| 2381 | // for efficiency reasons) for the interpolation formula |
| 2382 | |
| 2383 | // GRG: Do not calculate the points until they are |
| 2384 | // really needed -- this way we can calculate |
| 2385 | // just one, instead of four, if d1, d2, d3 |
| 2386 | // or d4 are < gs_Epsilon |
| 2387 | |
| 2388 | const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1); |
| 2389 | const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1); |
| 2390 | const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2); |
| 2391 | const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2); |
| 2392 | |
| 2393 | // Now interpolate as a weighted average of the four surrounding |
| 2394 | // points, where the weights are the distances to each of those points |
| 2395 | |
| 2396 | // If the point is exactly at one point of the grid of the source |
| 2397 | // image, then don't interpolate -- just assign the pixel |
| 2398 | |
| 2399 | if (d1 < gs_Epsilon) // d1,d2,d3,d4 are positive -- no need for abs() |
| 2400 | { |
| 2401 | unsigned char *p = data[y1] + (3 * x1); |
| 2402 | *(dst++) = *(p++); |
| 2403 | *(dst++) = *(p++); |
| 2404 | *(dst++) = *p; |
| 2405 | |
| 2406 | if (has_alpha) |
| 2407 | *(alpha_dst++) = *(alpha[y1] + x1); |
| 2408 | } |
| 2409 | else if (d2 < gs_Epsilon) |
| 2410 | { |
| 2411 | unsigned char *p = data[y1] + (3 * x2); |
| 2412 | *(dst++) = *(p++); |
| 2413 | *(dst++) = *(p++); |
| 2414 | *(dst++) = *p; |
| 2415 | |
| 2416 | if (has_alpha) |
| 2417 | *(alpha_dst++) = *(alpha[y1] + x2); |
| 2418 | } |
| 2419 | else if (d3 < gs_Epsilon) |
| 2420 | { |
| 2421 | unsigned char *p = data[y2] + (3 * x2); |
| 2422 | *(dst++) = *(p++); |
| 2423 | *(dst++) = *(p++); |
| 2424 | *(dst++) = *p; |
| 2425 | |
| 2426 | if (has_alpha) |
| 2427 | *(alpha_dst++) = *(alpha[y2] + x2); |
| 2428 | } |
| 2429 | else if (d4 < gs_Epsilon) |
| 2430 | { |
| 2431 | unsigned char *p = data[y2] + (3 * x1); |
| 2432 | *(dst++) = *(p++); |
| 2433 | *(dst++) = *(p++); |
| 2434 | *(dst++) = *p; |
| 2435 | |
| 2436 | if (has_alpha) |
| 2437 | *(alpha_dst++) = *(alpha[y2] + x1); |
| 2438 | } |
| 2439 | else |
| 2440 | { |
| 2441 | // weights for the weighted average are proportional to the inverse of the distance |
| 2442 | unsigned char *v1 = data[y1] + (3 * x1); |
| 2443 | unsigned char *v2 = data[y1] + (3 * x2); |
| 2444 | unsigned char *v3 = data[y2] + (3 * x2); |
| 2445 | unsigned char *v4 = data[y2] + (3 * x1); |
| 2446 | |
| 2447 | const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4; |
| 2448 | |
| 2449 | // GRG: Unrolled. |
| 2450 | |
| 2451 | *(dst++) = (unsigned char) |
| 2452 | ( (w1 * *(v1++) + w2 * *(v2++) + |
| 2453 | w3 * *(v3++) + w4 * *(v4++)) / |
| 2454 | (w1 + w2 + w3 + w4) ); |
| 2455 | *(dst++) = (unsigned char) |
| 2456 | ( (w1 * *(v1++) + w2 * *(v2++) + |
| 2457 | w3 * *(v3++) + w4 * *(v4++)) / |
| 2458 | (w1 + w2 + w3 + w4) ); |
| 2459 | *(dst++) = (unsigned char) |
| 2460 | ( (w1 * *v1 + w2 * *v2 + |
| 2461 | w3 * *v3 + w4 * *v4) / |
| 2462 | (w1 + w2 + w3 + w4) ); |
| 2463 | |
| 2464 | if (has_alpha) |
| 2465 | { |
| 2466 | v1 = alpha[y1] + (x1); |
| 2467 | v2 = alpha[y1] + (x2); |
| 2468 | v3 = alpha[y2] + (x2); |
| 2469 | v4 = alpha[y2] + (x1); |
| 2470 | |
| 2471 | *(alpha_dst++) = (unsigned char) |
| 2472 | ( (w1 * *v1 + w2 * *v2 + |
| 2473 | w3 * *v3 + w4 * *v4) / |
| 2474 | (w1 + w2 + w3 + w4) ); |
| 2475 | } |
| 2476 | } |
| 2477 | } |
| 2478 | else |
| 2479 | { |
| 2480 | *(dst++) = blank_r; |
| 2481 | *(dst++) = blank_g; |
| 2482 | *(dst++) = blank_b; |
| 2483 | |
| 2484 | if (has_alpha) |
| 2485 | *(alpha_dst++) = 0; |
| 2486 | } |
| 2487 | } |
| 2488 | } |
| 2489 | } |
| 2490 | else // not interpolating |
| 2491 | { |
| 2492 | for (int y = 0; y < rotated.GetHeight(); y++) |
| 2493 | { |
| 2494 | for (x = 0; x < rotated.GetWidth(); x++) |
| 2495 | { |
| 2496 | wxRealPoint src = rotated_point (x + x1a, y + y1a, cos_angle, -sin_angle, p0); |
| 2497 | |
| 2498 | const int xs = wxCint (src.x); // wxCint rounds to the |
| 2499 | const int ys = wxCint (src.y); // closest integer |
| 2500 | |
| 2501 | if (0 <= xs && xs < GetWidth() && |
| 2502 | 0 <= ys && ys < GetHeight()) |
| 2503 | { |
| 2504 | unsigned char *p = data[ys] + (3 * xs); |
| 2505 | *(dst++) = *(p++); |
| 2506 | *(dst++) = *(p++); |
| 2507 | *(dst++) = *p; |
| 2508 | |
| 2509 | if (has_alpha) |
| 2510 | *(alpha_dst++) = *(alpha[ys] + (xs)); |
| 2511 | } |
| 2512 | else |
| 2513 | { |
| 2514 | *(dst++) = blank_r; |
| 2515 | *(dst++) = blank_g; |
| 2516 | *(dst++) = blank_b; |
| 2517 | |
| 2518 | if (has_alpha) |
| 2519 | *(alpha_dst++) = 255; |
| 2520 | } |
| 2521 | } |
| 2522 | } |
| 2523 | } |
| 2524 | |
| 2525 | delete [] data; |
| 2526 | |
| 2527 | if (has_alpha) |
| 2528 | delete [] alpha; |
| 2529 | |
| 2530 | return rotated; |
| 2531 | } |
| 2532 | |
| 2533 | |
| 2534 | |
| 2535 | |
| 2536 | |
| 2537 | // A module to allow wxImage initialization/cleanup |
| 2538 | // without calling these functions from app.cpp or from |
| 2539 | // the user's application. |
| 2540 | |
| 2541 | class wxImageModule: public wxModule |
| 2542 | { |
| 2543 | DECLARE_DYNAMIC_CLASS(wxImageModule) |
| 2544 | public: |
| 2545 | wxImageModule() {} |
| 2546 | bool OnInit() { wxImage::InitStandardHandlers(); return true; }; |
| 2547 | void OnExit() { wxImage::CleanUpHandlers(); }; |
| 2548 | }; |
| 2549 | |
| 2550 | IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule) |
| 2551 | |
| 2552 | |
| 2553 | #endif // wxUSE_IMAGE |