| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: samples/image/image.cpp |
| 3 | // Purpose: sample showing operations with wxImage |
| 4 | // Author: Robert Roebling |
| 5 | // Modified by: Francesco Montorsi |
| 6 | // Created: 1998 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 1998-2005 Robert Roebling |
| 9 | // (c) 2005-2009 Vadim Zeitlin |
| 10 | // License: wxWindows licence |
| 11 | /////////////////////////////////////////////////////////////////////////////// |
| 12 | |
| 13 | // For compilers that support precompilation, includes "wx/wx.h". |
| 14 | #include "wx/wxprec.h" |
| 15 | |
| 16 | #ifdef __BORLANDC__ |
| 17 | #pragma hdrstop |
| 18 | #endif |
| 19 | |
| 20 | #ifndef WX_PRECOMP |
| 21 | #include "wx/wx.h" |
| 22 | #endif |
| 23 | |
| 24 | #include "wx/image.h" |
| 25 | #include "wx/file.h" |
| 26 | #include "wx/filename.h" |
| 27 | #include "wx/mstream.h" |
| 28 | #include "wx/wfstream.h" |
| 29 | #include "wx/quantize.h" |
| 30 | #include "wx/stopwatch.h" |
| 31 | |
| 32 | #if wxUSE_CLIPBOARD |
| 33 | #include "wx/dataobj.h" |
| 34 | #include "wx/clipbrd.h" |
| 35 | #endif // wxUSE_CLIPBOARD |
| 36 | |
| 37 | #if defined(__WXMSW__) |
| 38 | #ifdef wxHAVE_RAW_BITMAP |
| 39 | #include "wx/rawbmp.h" |
| 40 | #endif |
| 41 | #endif |
| 42 | |
| 43 | #if defined(__WXMAC__) || defined(__WXGTK__) |
| 44 | #define wxHAVE_RAW_BITMAP |
| 45 | #include "wx/rawbmp.h" |
| 46 | #endif |
| 47 | |
| 48 | #include "canvas.h" |
| 49 | |
| 50 | #ifndef __WXMSW__ |
| 51 | #include "../sample.xpm" |
| 52 | #endif |
| 53 | |
| 54 | // ============================================================================ |
| 55 | // declarations |
| 56 | // ============================================================================ |
| 57 | |
| 58 | //----------------------------------------------------------------------------- |
| 59 | // MyApp |
| 60 | //----------------------------------------------------------------------------- |
| 61 | |
| 62 | class MyApp: public wxApp |
| 63 | { |
| 64 | public: |
| 65 | virtual bool OnInit(); |
| 66 | }; |
| 67 | |
| 68 | // ---------------------------------------------------------------------------- |
| 69 | // MyFrame |
| 70 | // ---------------------------------------------------------------------------- |
| 71 | |
| 72 | class MyFrame: public wxFrame |
| 73 | { |
| 74 | public: |
| 75 | MyFrame(); |
| 76 | |
| 77 | void OnAbout( wxCommandEvent &event ); |
| 78 | void OnNewFrame( wxCommandEvent &event ); |
| 79 | void OnImageInfo( wxCommandEvent &event ); |
| 80 | void OnThumbnail( wxCommandEvent &event ); |
| 81 | |
| 82 | #ifdef wxHAVE_RAW_BITMAP |
| 83 | void OnTestRawBitmap( wxCommandEvent &event ); |
| 84 | #endif // wxHAVE_RAW_BITMAP |
| 85 | void OnQuit( wxCommandEvent &event ); |
| 86 | |
| 87 | #if wxUSE_CLIPBOARD |
| 88 | void OnCopy(wxCommandEvent& event); |
| 89 | void OnPaste(wxCommandEvent& event); |
| 90 | #endif // wxUSE_CLIPBOARD |
| 91 | |
| 92 | MyCanvas *m_canvas; |
| 93 | |
| 94 | private: |
| 95 | // ask user for the file name and try to load an image from it |
| 96 | // |
| 97 | // return the file path on success, empty string if we failed to load the |
| 98 | // image or were cancelled by user |
| 99 | static wxString LoadUserImage(wxImage& image); |
| 100 | |
| 101 | |
| 102 | DECLARE_DYNAMIC_CLASS(MyFrame) |
| 103 | DECLARE_EVENT_TABLE() |
| 104 | }; |
| 105 | |
| 106 | // ---------------------------------------------------------------------------- |
| 107 | // Frame used for showing a standalone image |
| 108 | // ---------------------------------------------------------------------------- |
| 109 | |
| 110 | enum |
| 111 | { |
| 112 | ID_ROTATE_LEFT = wxID_HIGHEST+1, |
| 113 | ID_ROTATE_RIGHT, |
| 114 | ID_RESIZE, |
| 115 | ID_PAINT_BG |
| 116 | }; |
| 117 | |
| 118 | class MyImageFrame : public wxFrame |
| 119 | { |
| 120 | public: |
| 121 | MyImageFrame(wxFrame *parent, const wxString& desc, const wxImage& image) |
| 122 | { |
| 123 | Create(parent, desc, wxBitmap(image), image.GetImageCount(desc)); |
| 124 | } |
| 125 | |
| 126 | MyImageFrame(wxFrame *parent, const wxString& desc, const wxBitmap& bitmap) |
| 127 | { |
| 128 | Create(parent, desc, bitmap); |
| 129 | } |
| 130 | |
| 131 | private: |
| 132 | bool Create(wxFrame *parent, |
| 133 | const wxString& desc, |
| 134 | const wxBitmap& bitmap, |
| 135 | int numImages = 1) |
| 136 | { |
| 137 | if ( !wxFrame::Create(parent, wxID_ANY, |
| 138 | wxString::Format(wxT("Image from %s"), desc), |
| 139 | wxDefaultPosition, wxDefaultSize, |
| 140 | wxDEFAULT_FRAME_STYLE | wxFULL_REPAINT_ON_RESIZE) ) |
| 141 | return false; |
| 142 | |
| 143 | m_bitmap = bitmap; |
| 144 | m_zoom = 1.; |
| 145 | |
| 146 | wxMenu *menu = new wxMenu; |
| 147 | menu->Append(wxID_SAVE); |
| 148 | menu->AppendSeparator(); |
| 149 | menu->AppendCheckItem(ID_PAINT_BG, wxT("&Paint background"), |
| 150 | "Uncheck this for transparent images"); |
| 151 | menu->AppendSeparator(); |
| 152 | menu->Append(ID_RESIZE, wxT("&Fit to window\tCtrl-F")); |
| 153 | menu->Append(wxID_ZOOM_IN, "Zoom &in\tCtrl-+"); |
| 154 | menu->Append(wxID_ZOOM_OUT, "Zoom &out\tCtrl--"); |
| 155 | menu->Append(wxID_ZOOM_100, "Reset zoom to &100%\tCtrl-1"); |
| 156 | menu->AppendSeparator(); |
| 157 | menu->Append(ID_ROTATE_LEFT, wxT("Rotate &left\tCtrl-L")); |
| 158 | menu->Append(ID_ROTATE_RIGHT, wxT("Rotate &right\tCtrl-R")); |
| 159 | |
| 160 | wxMenuBar *mbar = new wxMenuBar; |
| 161 | mbar->Append(menu, wxT("&Image")); |
| 162 | SetMenuBar(mbar); |
| 163 | |
| 164 | mbar->Check(ID_PAINT_BG, true); |
| 165 | |
| 166 | CreateStatusBar(2); |
| 167 | if ( numImages != 1 ) |
| 168 | SetStatusText(wxString::Format("%d images", numImages), 1); |
| 169 | |
| 170 | SetClientSize(bitmap.GetWidth(), bitmap.GetHeight()); |
| 171 | |
| 172 | UpdateStatusBar(); |
| 173 | |
| 174 | Show(); |
| 175 | |
| 176 | return true; |
| 177 | } |
| 178 | |
| 179 | void OnEraseBackground(wxEraseEvent& WXUNUSED(event)) |
| 180 | { |
| 181 | // do nothing here to be able to see how transparent images are shown |
| 182 | } |
| 183 | |
| 184 | void OnPaint(wxPaintEvent& WXUNUSED(event)) |
| 185 | { |
| 186 | wxPaintDC dc(this); |
| 187 | |
| 188 | if ( GetMenuBar()->IsChecked(ID_PAINT_BG) ) |
| 189 | ClearBackground(); |
| 190 | |
| 191 | dc.SetUserScale(m_zoom, m_zoom); |
| 192 | |
| 193 | const wxSize size = GetClientSize(); |
| 194 | dc.DrawBitmap |
| 195 | ( |
| 196 | m_bitmap, |
| 197 | dc.DeviceToLogicalX((size.x - m_zoom*m_bitmap.GetWidth())/2), |
| 198 | dc.DeviceToLogicalY((size.y - m_zoom*m_bitmap.GetHeight())/2), |
| 199 | true /* use mask */ |
| 200 | ); |
| 201 | } |
| 202 | |
| 203 | void OnSave(wxCommandEvent& WXUNUSED(event)) |
| 204 | { |
| 205 | #if wxUSE_FILEDLG |
| 206 | wxImage image = m_bitmap.ConvertToImage(); |
| 207 | |
| 208 | wxString savefilename = wxFileSelector( wxT("Save Image"), |
| 209 | wxEmptyString, |
| 210 | wxEmptyString, |
| 211 | (const wxChar *)NULL, |
| 212 | wxT("BMP files (*.bmp)|*.bmp|") |
| 213 | #if wxUSE_LIBPNG |
| 214 | wxT("PNG files (*.png)|*.png|") |
| 215 | #endif |
| 216 | #if wxUSE_LIBJPEG |
| 217 | wxT("JPEG files (*.jpg)|*.jpg|") |
| 218 | #endif |
| 219 | #if wxUSE_GIF |
| 220 | wxT("GIF files (*.gif)|*.gif|") |
| 221 | #endif |
| 222 | #if wxUSE_LIBTIFF |
| 223 | wxT("TIFF files (*.tif)|*.tif|") |
| 224 | #endif |
| 225 | #if wxUSE_PCX |
| 226 | wxT("PCX files (*.pcx)|*.pcx|") |
| 227 | #endif |
| 228 | wxT("ICO files (*.ico)|*.ico|") |
| 229 | wxT("CUR files (*.cur)|*.cur"), |
| 230 | wxFD_SAVE, |
| 231 | this); |
| 232 | |
| 233 | if ( savefilename.empty() ) |
| 234 | return; |
| 235 | |
| 236 | wxString extension; |
| 237 | wxFileName::SplitPath(savefilename, NULL, NULL, &extension); |
| 238 | |
| 239 | bool saved = false; |
| 240 | if ( extension == wxT("bmp") ) |
| 241 | { |
| 242 | static const int bppvalues[] = |
| 243 | { |
| 244 | wxBMP_1BPP, |
| 245 | wxBMP_1BPP_BW, |
| 246 | wxBMP_4BPP, |
| 247 | wxBMP_8BPP, |
| 248 | wxBMP_8BPP_GREY, |
| 249 | wxBMP_8BPP_RED, |
| 250 | wxBMP_8BPP_PALETTE, |
| 251 | wxBMP_24BPP |
| 252 | }; |
| 253 | |
| 254 | const wxString bppchoices[] = |
| 255 | { |
| 256 | wxT("1 bpp color"), |
| 257 | wxT("1 bpp B&W"), |
| 258 | wxT("4 bpp color"), |
| 259 | wxT("8 bpp color"), |
| 260 | wxT("8 bpp greyscale"), |
| 261 | wxT("8 bpp red"), |
| 262 | wxT("8 bpp own palette"), |
| 263 | wxT("24 bpp") |
| 264 | }; |
| 265 | |
| 266 | int bppselection = wxGetSingleChoiceIndex(wxT("Set BMP BPP"), |
| 267 | wxT("Image sample: save file"), |
| 268 | WXSIZEOF(bppchoices), |
| 269 | bppchoices, |
| 270 | this); |
| 271 | if ( bppselection != -1 ) |
| 272 | { |
| 273 | int format = bppvalues[bppselection]; |
| 274 | image.SetOption(wxIMAGE_OPTION_BMP_FORMAT, format); |
| 275 | |
| 276 | if ( format == wxBMP_8BPP_PALETTE ) |
| 277 | { |
| 278 | unsigned char *cmap = new unsigned char [256]; |
| 279 | for ( int i = 0; i < 256; i++ ) |
| 280 | cmap[i] = (unsigned char)i; |
| 281 | image.SetPalette(wxPalette(256, cmap, cmap, cmap)); |
| 282 | |
| 283 | delete[] cmap; |
| 284 | } |
| 285 | } |
| 286 | } |
| 287 | #if wxUSE_LIBPNG |
| 288 | else if ( extension == wxT("png") ) |
| 289 | { |
| 290 | static const int pngvalues[] = |
| 291 | { |
| 292 | wxPNG_TYPE_COLOUR, |
| 293 | wxPNG_TYPE_COLOUR, |
| 294 | wxPNG_TYPE_GREY, |
| 295 | wxPNG_TYPE_GREY, |
| 296 | wxPNG_TYPE_GREY_RED, |
| 297 | wxPNG_TYPE_GREY_RED, |
| 298 | }; |
| 299 | |
| 300 | const wxString pngchoices[] = |
| 301 | { |
| 302 | wxT("Colour 8bpp"), |
| 303 | wxT("Colour 16bpp"), |
| 304 | wxT("Grey 8bpp"), |
| 305 | wxT("Grey 16bpp"), |
| 306 | wxT("Grey red 8bpp"), |
| 307 | wxT("Grey red 16bpp"), |
| 308 | }; |
| 309 | |
| 310 | int sel = wxGetSingleChoiceIndex(wxT("Set PNG format"), |
| 311 | wxT("Image sample: save file"), |
| 312 | WXSIZEOF(pngchoices), |
| 313 | pngchoices, |
| 314 | this); |
| 315 | if ( sel != -1 ) |
| 316 | { |
| 317 | image.SetOption(wxIMAGE_OPTION_PNG_FORMAT, pngvalues[sel]); |
| 318 | image.SetOption(wxIMAGE_OPTION_PNG_BITDEPTH, sel % 2 ? 16 : 8); |
| 319 | |
| 320 | // these values are taken from OptiPNG with -o3 switch |
| 321 | const wxString compressionChoices[] = |
| 322 | { |
| 323 | wxT("compression = 9, memory = 8, strategy = 0, filter = 0"), |
| 324 | wxT("compression = 9, memory = 9, strategy = 0, filter = 0"), |
| 325 | wxT("compression = 9, memory = 8, strategy = 1, filter = 0"), |
| 326 | wxT("compression = 9, memory = 9, strategy = 1, filter = 0"), |
| 327 | wxT("compression = 1, memory = 8, strategy = 2, filter = 0"), |
| 328 | wxT("compression = 1, memory = 9, strategy = 2, filter = 0"), |
| 329 | wxT("compression = 9, memory = 8, strategy = 0, filter = 5"), |
| 330 | wxT("compression = 9, memory = 9, strategy = 0, filter = 5"), |
| 331 | wxT("compression = 9, memory = 8, strategy = 1, filter = 5"), |
| 332 | wxT("compression = 9, memory = 9, strategy = 1, filter = 5"), |
| 333 | wxT("compression = 1, memory = 8, strategy = 2, filter = 5"), |
| 334 | wxT("compression = 1, memory = 9, strategy = 2, filter = 5"), |
| 335 | }; |
| 336 | |
| 337 | int sel = wxGetSingleChoiceIndex(wxT("Select compression option (Cancel to use default)\n"), |
| 338 | wxT("PNG Compression Options"), |
| 339 | WXSIZEOF(compressionChoices), |
| 340 | compressionChoices, |
| 341 | this); |
| 342 | if (sel != -1) |
| 343 | { |
| 344 | const int zc[] = {9, 9, 9, 9, 1, 1, 9, 9, 9, 9, 1, 1}; |
| 345 | const int zm[] = {8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9}; |
| 346 | const int zs[] = {0, 0, 1, 1, 2, 2, 0, 0, 1, 1, 2, 2}; |
| 347 | const int f[] = {0x08, 0x08, 0x08, 0x08, 0x08, 0x08, |
| 348 | 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8}; |
| 349 | |
| 350 | image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL , zc[sel]); |
| 351 | image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL , zm[sel]); |
| 352 | image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY , zs[sel]); |
| 353 | image.SetOption(wxIMAGE_OPTION_PNG_FILTER , f[sel]); |
| 354 | image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE, 1048576); // 1 MB |
| 355 | } |
| 356 | } |
| 357 | } |
| 358 | #endif // wxUSE_LIBPNG |
| 359 | else if ( extension == wxT("cur") ) |
| 360 | { |
| 361 | image.Rescale(32,32); |
| 362 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0); |
| 363 | image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0); |
| 364 | // This shows how you can save an image with explicitly |
| 365 | // specified image format: |
| 366 | saved = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR); |
| 367 | } |
| 368 | |
| 369 | if ( !saved ) |
| 370 | { |
| 371 | // This one guesses image format from filename extension |
| 372 | // (it may fail if the extension is not recognized): |
| 373 | image.SaveFile(savefilename); |
| 374 | } |
| 375 | #endif // wxUSE_FILEDLG |
| 376 | } |
| 377 | |
| 378 | void OnResize(wxCommandEvent& WXUNUSED(event)) |
| 379 | { |
| 380 | wxImage img(m_bitmap.ConvertToImage()); |
| 381 | |
| 382 | const wxSize size = GetClientSize(); |
| 383 | img.Rescale(size.x, size.y, wxIMAGE_QUALITY_HIGH); |
| 384 | m_bitmap = wxBitmap(img); |
| 385 | |
| 386 | UpdateStatusBar(); |
| 387 | } |
| 388 | |
| 389 | void OnZoom(wxCommandEvent& event) |
| 390 | { |
| 391 | if ( event.GetId() == wxID_ZOOM_IN ) |
| 392 | m_zoom *= 1.2; |
| 393 | else if ( event.GetId() == wxID_ZOOM_OUT ) |
| 394 | m_zoom /= 1.2; |
| 395 | else // wxID_ZOOM_100 |
| 396 | m_zoom = 1.; |
| 397 | |
| 398 | UpdateStatusBar(); |
| 399 | } |
| 400 | |
| 401 | void OnRotate(wxCommandEvent& event) |
| 402 | { |
| 403 | double angle = 5; |
| 404 | if ( event.GetId() == ID_ROTATE_LEFT ) |
| 405 | angle = -angle; |
| 406 | |
| 407 | wxImage img(m_bitmap.ConvertToImage()); |
| 408 | img = img.Rotate(angle, wxPoint(img.GetWidth() / 2, img.GetHeight() / 2)); |
| 409 | if ( !img.Ok() ) |
| 410 | { |
| 411 | wxLogWarning(wxT("Rotation failed")); |
| 412 | return; |
| 413 | } |
| 414 | |
| 415 | m_bitmap = wxBitmap(img); |
| 416 | |
| 417 | UpdateStatusBar(); |
| 418 | } |
| 419 | |
| 420 | void UpdateStatusBar() |
| 421 | { |
| 422 | wxLogStatus(this, wxT("Image size: (%d, %d), zoom %.2f"), |
| 423 | m_bitmap.GetWidth(), |
| 424 | m_bitmap.GetHeight(), |
| 425 | m_zoom); |
| 426 | Refresh(); |
| 427 | } |
| 428 | |
| 429 | wxBitmap m_bitmap; |
| 430 | double m_zoom; |
| 431 | |
| 432 | DECLARE_EVENT_TABLE() |
| 433 | }; |
| 434 | |
| 435 | #ifdef wxHAVE_RAW_BITMAP |
| 436 | |
| 437 | #include "wx/rawbmp.h" |
| 438 | |
| 439 | class MyRawBitmapFrame : public wxFrame |
| 440 | { |
| 441 | public: |
| 442 | enum |
| 443 | { |
| 444 | BORDER = 15, |
| 445 | SIZE = 150, |
| 446 | REAL_SIZE = SIZE - 2*BORDER |
| 447 | }; |
| 448 | |
| 449 | MyRawBitmapFrame(wxFrame *parent) |
| 450 | : wxFrame(parent, wxID_ANY, wxT("Raw bitmaps (how exciting)")), |
| 451 | m_bitmap(SIZE, SIZE, 24), |
| 452 | m_alphaBitmap(SIZE, SIZE, 32) |
| 453 | { |
| 454 | SetClientSize(SIZE, SIZE*2+25); |
| 455 | |
| 456 | InitAlphaBitmap(); |
| 457 | InitBitmap(); |
| 458 | |
| 459 | } |
| 460 | |
| 461 | void InitAlphaBitmap() |
| 462 | { |
| 463 | // First, clear the whole bitmap by making it alpha |
| 464 | { |
| 465 | wxAlphaPixelData data( m_alphaBitmap, wxPoint(0,0), wxSize(SIZE, SIZE) ); |
| 466 | if ( !data ) |
| 467 | { |
| 468 | wxLogError(wxT("Failed to gain raw access to bitmap data")); |
| 469 | return; |
| 470 | } |
| 471 | wxAlphaPixelData::Iterator p(data); |
| 472 | for ( int y = 0; y < SIZE; ++y ) |
| 473 | { |
| 474 | wxAlphaPixelData::Iterator rowStart = p; |
| 475 | for ( int x = 0; x < SIZE; ++x ) |
| 476 | { |
| 477 | p.Alpha() = 0; |
| 478 | ++p; // same as p.OffsetX(1) |
| 479 | } |
| 480 | p = rowStart; |
| 481 | p.OffsetY(data, 1); |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | // Then, draw colourful alpha-blended stripes |
| 486 | wxAlphaPixelData data(m_alphaBitmap, wxPoint(BORDER, BORDER), |
| 487 | wxSize(REAL_SIZE, REAL_SIZE)); |
| 488 | if ( !data ) |
| 489 | { |
| 490 | wxLogError(wxT("Failed to gain raw access to bitmap data")); |
| 491 | return; |
| 492 | } |
| 493 | |
| 494 | wxAlphaPixelData::Iterator p(data); |
| 495 | |
| 496 | for ( int y = 0; y < REAL_SIZE; ++y ) |
| 497 | { |
| 498 | wxAlphaPixelData::Iterator rowStart = p; |
| 499 | |
| 500 | int r = y < REAL_SIZE/3 ? 255 : 0, |
| 501 | g = (REAL_SIZE/3 <= y) && (y < 2*(REAL_SIZE/3)) ? 255 : 0, |
| 502 | b = 2*(REAL_SIZE/3) <= y ? 255 : 0; |
| 503 | |
| 504 | for ( int x = 0; x < REAL_SIZE; ++x ) |
| 505 | { |
| 506 | // note that RGB must be premultiplied by alpha |
| 507 | unsigned a = (wxAlphaPixelData::Iterator::ChannelType)((x*255.)/REAL_SIZE); |
| 508 | p.Red() = r * a / 256; |
| 509 | p.Green() = g * a / 256; |
| 510 | p.Blue() = b * a / 256; |
| 511 | p.Alpha() = a; |
| 512 | |
| 513 | ++p; // same as p.OffsetX(1) |
| 514 | } |
| 515 | |
| 516 | p = rowStart; |
| 517 | p.OffsetY(data, 1); |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | void InitBitmap() |
| 522 | { |
| 523 | // draw some colourful stripes without alpha |
| 524 | wxNativePixelData data(m_bitmap); |
| 525 | if ( !data ) |
| 526 | { |
| 527 | wxLogError(wxT("Failed to gain raw access to bitmap data")); |
| 528 | return; |
| 529 | } |
| 530 | |
| 531 | wxNativePixelData::Iterator p(data); |
| 532 | for ( int y = 0; y < SIZE; ++y ) |
| 533 | { |
| 534 | wxNativePixelData::Iterator rowStart = p; |
| 535 | |
| 536 | int r = y < SIZE/3 ? 255 : 0, |
| 537 | g = (SIZE/3 <= y) && (y < 2*(SIZE/3)) ? 255 : 0, |
| 538 | b = 2*(SIZE/3) <= y ? 255 : 0; |
| 539 | |
| 540 | for ( int x = 0; x < SIZE; ++x ) |
| 541 | { |
| 542 | p.Red() = r; |
| 543 | p.Green() = g; |
| 544 | p.Blue() = b; |
| 545 | ++p; // same as p.OffsetX(1) |
| 546 | } |
| 547 | |
| 548 | p = rowStart; |
| 549 | p.OffsetY(data, 1); |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | void OnPaint(wxPaintEvent& WXUNUSED(event)) |
| 554 | { |
| 555 | wxPaintDC dc( this ); |
| 556 | dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, BORDER); |
| 557 | dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, SIZE/2 - BORDER); |
| 558 | dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, SIZE - 2*BORDER); |
| 559 | dc.DrawBitmap( m_alphaBitmap, 0, 0, true /* use mask */ ); |
| 560 | |
| 561 | dc.DrawText(wxT("Raw bitmap access without alpha"), 0, SIZE+5); |
| 562 | dc.DrawBitmap( m_bitmap, 0, SIZE+5+dc.GetCharHeight()); |
| 563 | } |
| 564 | |
| 565 | private: |
| 566 | wxBitmap m_bitmap; |
| 567 | wxBitmap m_alphaBitmap; |
| 568 | |
| 569 | DECLARE_EVENT_TABLE() |
| 570 | }; |
| 571 | |
| 572 | #endif // wxHAVE_RAW_BITMAP |
| 573 | |
| 574 | |
| 575 | // ============================================================================ |
| 576 | // implementations |
| 577 | // ============================================================================ |
| 578 | |
| 579 | //----------------------------------------------------------------------------- |
| 580 | // MyImageFrame |
| 581 | //----------------------------------------------------------------------------- |
| 582 | |
| 583 | BEGIN_EVENT_TABLE(MyImageFrame, wxFrame) |
| 584 | EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground) |
| 585 | EVT_PAINT(MyImageFrame::OnPaint) |
| 586 | |
| 587 | EVT_MENU(wxID_SAVE, MyImageFrame::OnSave) |
| 588 | EVT_MENU_RANGE(ID_ROTATE_LEFT, ID_ROTATE_RIGHT, MyImageFrame::OnRotate) |
| 589 | EVT_MENU(ID_RESIZE, MyImageFrame::OnResize) |
| 590 | |
| 591 | EVT_MENU(wxID_ZOOM_IN, MyImageFrame::OnZoom) |
| 592 | EVT_MENU(wxID_ZOOM_OUT, MyImageFrame::OnZoom) |
| 593 | EVT_MENU(wxID_ZOOM_100, MyImageFrame::OnZoom) |
| 594 | END_EVENT_TABLE() |
| 595 | |
| 596 | //----------------------------------------------------------------------------- |
| 597 | // MyRawBitmapFrame |
| 598 | //----------------------------------------------------------------------------- |
| 599 | |
| 600 | #ifdef wxHAVE_RAW_BITMAP |
| 601 | |
| 602 | BEGIN_EVENT_TABLE(MyRawBitmapFrame, wxFrame) |
| 603 | EVT_PAINT(MyRawBitmapFrame::OnPaint) |
| 604 | END_EVENT_TABLE() |
| 605 | |
| 606 | #endif // wxHAVE_RAW_BITMAP |
| 607 | |
| 608 | //----------------------------------------------------------------------------- |
| 609 | // MyFrame |
| 610 | //----------------------------------------------------------------------------- |
| 611 | |
| 612 | enum |
| 613 | { |
| 614 | ID_QUIT = wxID_EXIT, |
| 615 | ID_ABOUT = wxID_ABOUT, |
| 616 | ID_NEW = 100, |
| 617 | ID_INFO, |
| 618 | ID_SHOWRAW, |
| 619 | ID_SHOWTHUMBNAIL |
| 620 | }; |
| 621 | |
| 622 | IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame ) |
| 623 | BEGIN_EVENT_TABLE(MyFrame, wxFrame) |
| 624 | EVT_MENU (ID_ABOUT, MyFrame::OnAbout) |
| 625 | EVT_MENU (ID_QUIT, MyFrame::OnQuit) |
| 626 | EVT_MENU (ID_NEW, MyFrame::OnNewFrame) |
| 627 | EVT_MENU (ID_INFO, MyFrame::OnImageInfo) |
| 628 | EVT_MENU (ID_SHOWTHUMBNAIL, MyFrame::OnThumbnail) |
| 629 | #ifdef wxHAVE_RAW_BITMAP |
| 630 | EVT_MENU (ID_SHOWRAW, MyFrame::OnTestRawBitmap) |
| 631 | #endif |
| 632 | #if wxUSE_CLIPBOARD |
| 633 | EVT_MENU(wxID_COPY, MyFrame::OnCopy) |
| 634 | EVT_MENU(wxID_PASTE, MyFrame::OnPaste) |
| 635 | #endif // wxUSE_CLIPBOARD |
| 636 | END_EVENT_TABLE() |
| 637 | |
| 638 | MyFrame::MyFrame() |
| 639 | : wxFrame( (wxFrame *)NULL, wxID_ANY, wxT("wxImage sample"), |
| 640 | wxPoint(20, 20), wxSize(950, 700) ) |
| 641 | { |
| 642 | SetIcon(wxICON(sample)); |
| 643 | |
| 644 | wxMenuBar *menu_bar = new wxMenuBar(); |
| 645 | |
| 646 | wxMenu *menuImage = new wxMenu; |
| 647 | menuImage->Append( ID_NEW, wxT("&Show any image...\tCtrl-O")); |
| 648 | menuImage->Append( ID_INFO, wxT("Show image &information...\tCtrl-I")); |
| 649 | #ifdef wxHAVE_RAW_BITMAP |
| 650 | menuImage->AppendSeparator(); |
| 651 | menuImage->Append( ID_SHOWRAW, wxT("Test &raw bitmap...\tCtrl-R")); |
| 652 | #endif |
| 653 | menuImage->AppendSeparator(); |
| 654 | menuImage->Append( ID_SHOWTHUMBNAIL, wxT("Test &thumbnail...\tCtrl-T"), |
| 655 | "Test scaling the image during load (try with JPEG)"); |
| 656 | menuImage->AppendSeparator(); |
| 657 | menuImage->Append( ID_ABOUT, wxT("&About...")); |
| 658 | menuImage->AppendSeparator(); |
| 659 | menuImage->Append( ID_QUIT, wxT("E&xit\tCtrl-Q")); |
| 660 | menu_bar->Append(menuImage, wxT("&Image")); |
| 661 | |
| 662 | #if wxUSE_CLIPBOARD |
| 663 | wxMenu *menuClipboard = new wxMenu; |
| 664 | menuClipboard->Append(wxID_COPY, wxT("&Copy test image\tCtrl-C")); |
| 665 | menuClipboard->Append(wxID_PASTE, wxT("&Paste image\tCtrl-V")); |
| 666 | menu_bar->Append(menuClipboard, wxT("&Clipboard")); |
| 667 | #endif // wxUSE_CLIPBOARD |
| 668 | |
| 669 | SetMenuBar( menu_bar ); |
| 670 | |
| 671 | #if wxUSE_STATUSBAR |
| 672 | CreateStatusBar(2); |
| 673 | int widths[] = { -1, 100 }; |
| 674 | SetStatusWidths( 2, widths ); |
| 675 | #endif // wxUSE_STATUSBAR |
| 676 | |
| 677 | m_canvas = new MyCanvas( this, wxID_ANY, wxPoint(0,0), wxSize(10,10) ); |
| 678 | |
| 679 | // 500 width * 2750 height |
| 680 | m_canvas->SetScrollbars( 10, 10, 50, 275 ); |
| 681 | } |
| 682 | |
| 683 | void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) ) |
| 684 | { |
| 685 | Close( true ); |
| 686 | } |
| 687 | |
| 688 | void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) ) |
| 689 | { |
| 690 | (void)wxMessageBox( "wxImage demo\n" |
| 691 | "(c) Robert Roebling 1998-2005" |
| 692 | "(c) Vadim Zeitlin 2005-2009", |
| 693 | "About wxImage Demo", |
| 694 | wxICON_INFORMATION | wxOK ); |
| 695 | } |
| 696 | |
| 697 | wxString MyFrame::LoadUserImage(wxImage& image) |
| 698 | { |
| 699 | wxString filename; |
| 700 | |
| 701 | #if wxUSE_FILEDLG |
| 702 | filename = wxLoadFileSelector(wxT("image"), wxEmptyString); |
| 703 | if ( !filename.empty() ) |
| 704 | { |
| 705 | if ( !image.LoadFile(filename) ) |
| 706 | { |
| 707 | wxLogError(wxT("Couldn't load image from '%s'."), filename.c_str()); |
| 708 | |
| 709 | return wxEmptyString; |
| 710 | } |
| 711 | } |
| 712 | #endif // wxUSE_FILEDLG |
| 713 | |
| 714 | return filename; |
| 715 | } |
| 716 | |
| 717 | void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) ) |
| 718 | { |
| 719 | wxImage image; |
| 720 | wxString filename = LoadUserImage(image); |
| 721 | if ( !filename.empty() ) |
| 722 | new MyImageFrame(this, filename, image); |
| 723 | } |
| 724 | |
| 725 | void MyFrame::OnImageInfo( wxCommandEvent &WXUNUSED(event) ) |
| 726 | { |
| 727 | wxImage image; |
| 728 | if ( !LoadUserImage(image).empty() ) |
| 729 | { |
| 730 | // TODO: show more information about the file |
| 731 | wxString info = wxString::Format("Image size: %dx%d", |
| 732 | image.GetWidth(), |
| 733 | image.GetHeight()); |
| 734 | |
| 735 | int xres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX), |
| 736 | yres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY); |
| 737 | if ( xres || yres ) |
| 738 | { |
| 739 | info += wxString::Format("\nResolution: %dx%d", xres, yres); |
| 740 | switch ( image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT) ) |
| 741 | { |
| 742 | default: |
| 743 | wxFAIL_MSG( "unknown image resolution units" ); |
| 744 | // fall through |
| 745 | |
| 746 | case wxIMAGE_RESOLUTION_NONE: |
| 747 | info += " in default units"; |
| 748 | break; |
| 749 | |
| 750 | case wxIMAGE_RESOLUTION_INCHES: |
| 751 | info += " in"; |
| 752 | break; |
| 753 | |
| 754 | case wxIMAGE_RESOLUTION_CM: |
| 755 | info += " cm"; |
| 756 | break; |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | wxLogMessage("%s", info); |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | #ifdef wxHAVE_RAW_BITMAP |
| 765 | |
| 766 | void MyFrame::OnTestRawBitmap( wxCommandEvent &WXUNUSED(event) ) |
| 767 | { |
| 768 | (new MyRawBitmapFrame(this))->Show(); |
| 769 | } |
| 770 | |
| 771 | #endif // wxHAVE_RAW_BITMAP |
| 772 | |
| 773 | #if wxUSE_CLIPBOARD |
| 774 | |
| 775 | void MyFrame::OnCopy(wxCommandEvent& WXUNUSED(event)) |
| 776 | { |
| 777 | wxBitmapDataObject *dobjBmp = new wxBitmapDataObject; |
| 778 | dobjBmp->SetBitmap(m_canvas->my_horse_png); |
| 779 | |
| 780 | wxTheClipboard->Open(); |
| 781 | |
| 782 | if ( !wxTheClipboard->SetData(dobjBmp) ) |
| 783 | { |
| 784 | wxLogError(wxT("Failed to copy bitmap to clipboard")); |
| 785 | } |
| 786 | |
| 787 | wxTheClipboard->Close(); |
| 788 | } |
| 789 | |
| 790 | void MyFrame::OnPaste(wxCommandEvent& WXUNUSED(event)) |
| 791 | { |
| 792 | wxBitmapDataObject dobjBmp; |
| 793 | |
| 794 | wxTheClipboard->Open(); |
| 795 | if ( !wxTheClipboard->GetData(dobjBmp) ) |
| 796 | { |
| 797 | wxLogMessage(wxT("No bitmap data in the clipboard")); |
| 798 | } |
| 799 | else |
| 800 | { |
| 801 | new MyImageFrame(this, wxT("Clipboard"), dobjBmp.GetBitmap()); |
| 802 | } |
| 803 | wxTheClipboard->Close(); |
| 804 | } |
| 805 | |
| 806 | #endif // wxUSE_CLIPBOARD |
| 807 | |
| 808 | void MyFrame::OnThumbnail( wxCommandEvent &WXUNUSED(event) ) |
| 809 | { |
| 810 | #if wxUSE_FILEDLG |
| 811 | wxString filename = wxLoadFileSelector(wxT("image"), wxEmptyString, wxEmptyString, this); |
| 812 | if ( filename.empty() ) |
| 813 | return; |
| 814 | |
| 815 | static const int THUMBNAIL_WIDTH = 320; |
| 816 | static const int THUMBNAIL_HEIGHT = 240; |
| 817 | |
| 818 | wxImage image; |
| 819 | image.SetOption(wxIMAGE_OPTION_MAX_WIDTH, THUMBNAIL_WIDTH); |
| 820 | image.SetOption(wxIMAGE_OPTION_MAX_HEIGHT, THUMBNAIL_HEIGHT); |
| 821 | |
| 822 | wxStopWatch sw; |
| 823 | if ( !image.LoadFile(filename) ) |
| 824 | { |
| 825 | wxLogError(wxT("Couldn't load image from '%s'."), filename.c_str()); |
| 826 | return; |
| 827 | } |
| 828 | |
| 829 | const long loadTime = sw.Time(); |
| 830 | |
| 831 | MyImageFrame * const frame = new MyImageFrame(this, filename, image); |
| 832 | wxLogStatus(frame, "Loaded \"%s\" in %ldms", filename, loadTime); |
| 833 | #else |
| 834 | wxLogError( wxT("Couldn't create file selector dialog") ); |
| 835 | return; |
| 836 | #endif // wxUSE_FILEDLG |
| 837 | } |
| 838 | |
| 839 | //----------------------------------------------------------------------------- |
| 840 | // MyApp |
| 841 | //----------------------------------------------------------------------------- |
| 842 | |
| 843 | IMPLEMENT_APP(MyApp) |
| 844 | |
| 845 | bool MyApp::OnInit() |
| 846 | { |
| 847 | if ( !wxApp::OnInit() ) |
| 848 | return false; |
| 849 | |
| 850 | wxInitAllImageHandlers(); |
| 851 | |
| 852 | wxFrame *frame = new MyFrame(); |
| 853 | frame->Show( true ); |
| 854 | |
| 855 | return true; |
| 856 | } |