| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: pnghand.cpp |
| 3 | // Purpose: Implements a PNG reader class + handler |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 04/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart and Markus Holzem |
| 9 | // Licence: wxWindows license |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifdef __GNUG__ |
| 13 | # pragma implementation "pngread.h" |
| 14 | # pragma implementation "pnghand.h" |
| 15 | #endif |
| 16 | |
| 17 | // For compilers that support precompilation, includes "wx.h". |
| 18 | #include "wx/wxprec.h" |
| 19 | |
| 20 | #ifdef __BORLANDC__ |
| 21 | # pragma hdrstop |
| 22 | #endif |
| 23 | |
| 24 | #include <stdlib.h> |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | #if wxUSE_IOSTREAMH |
| 29 | # include <fstream.h> |
| 30 | #else |
| 31 | # include <fstream> |
| 32 | #endif |
| 33 | |
| 34 | #ifndef __DARWIN__ |
| 35 | # include <windows.h> |
| 36 | #endif |
| 37 | #include "wx/msgdlg.h" |
| 38 | #include "wx/palette.h" |
| 39 | #include "wx/bitmap.h" |
| 40 | #include "wx/mac/pnghand.h" |
| 41 | #include "wx/mac/pngread.h" |
| 42 | #include "wx/mac/private.h" |
| 43 | |
| 44 | extern "C" { |
| 45 | #include "png.h" |
| 46 | } |
| 47 | |
| 48 | extern "C" void png_read_init PNGARG((png_structp png_ptr)); |
| 49 | extern "C" void png_write_init PNGARG((png_structp png_ptr)); |
| 50 | |
| 51 | extern CTabHandle wxMacCreateColorTable( int numColors ) ; |
| 52 | extern void wxMacDestroyColorTable( CTabHandle colors ) ; |
| 53 | extern void wxMacSetColorTableEntry( CTabHandle newColors , int index , int red , int green , int blue ) ; |
| 54 | extern GWorldPtr wxMacCreateGWorld( int width , int height , int depth ) ; |
| 55 | extern void wxMacDestroyGWorld( GWorldPtr gw ) ; |
| 56 | |
| 57 | void |
| 58 | ima_png_error(png_struct *png_ptr, char *message) |
| 59 | { |
| 60 | wxMessageBox(message, "PNG error"); |
| 61 | longjmp(png_ptr->jmpbuf, 1); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | // static wxGifReaderIter* iter; |
| 66 | wxPalette *wxCopyPalette(const wxPalette *cmap); |
| 67 | |
| 68 | wxPNGReader::wxPNGReader(void) |
| 69 | { |
| 70 | filetype = 0; |
| 71 | RawImage = NULL; // Image data |
| 72 | |
| 73 | Width = 0; Height = 0; // Dimensions |
| 74 | Depth = 0; // (bits x pixel) |
| 75 | ColorType = 0; // Bit 1 = Palette used |
| 76 | // Bit 2 = Color used |
| 77 | // Bit 3 = Alpha used |
| 78 | |
| 79 | EfeWidth = 0; // Efective Width |
| 80 | |
| 81 | lpbi = NULL; |
| 82 | bgindex = -1; |
| 83 | m_palette = 0; |
| 84 | imageOK = FALSE; |
| 85 | } |
| 86 | |
| 87 | wxPNGReader::wxPNGReader ( char* ImageFileName ) |
| 88 | { |
| 89 | imageOK = FALSE; |
| 90 | filetype = 0; |
| 91 | RawImage = NULL; // Image data |
| 92 | |
| 93 | Width = 0; Height = 0; // Dimensions |
| 94 | Depth = 0; // (bits x pixel) |
| 95 | ColorType = 0; // Bit 1 = m_palette used |
| 96 | // Bit 2 = Color used |
| 97 | // Bit 3 = Alpha used |
| 98 | |
| 99 | EfeWidth = 0; // Efective Width |
| 100 | |
| 101 | lpbi = NULL; |
| 102 | bgindex = -1; |
| 103 | m_palette = 0; |
| 104 | |
| 105 | imageOK = ReadFile (ImageFileName); |
| 106 | } |
| 107 | |
| 108 | void |
| 109 | wxPNGReader::Create(int width, int height, int depth, int colortype) |
| 110 | { |
| 111 | Width = width; Height = height; Depth = depth; |
| 112 | ColorType = (colortype>=0) ? colortype: ((Depth>8) ? COLORTYPE_COLOR: 0); |
| 113 | delete m_palette; |
| 114 | delete[] RawImage ; |
| 115 | RawImage = 0; |
| 116 | m_palette = 0; |
| 117 | |
| 118 | if (lpbi) |
| 119 | { |
| 120 | wxMacDestroyGWorld( (GWorldPtr) lpbi ) ; |
| 121 | } |
| 122 | lpbi = wxMacCreateGWorld( Width , Height , Depth); |
| 123 | if (lpbi) |
| 124 | { |
| 125 | EfeWidth = (long)(((long)Width*Depth + 31) / 32) * 4; |
| 126 | int bitwidth = width ; |
| 127 | if ( EfeWidth > bitwidth ) |
| 128 | bitwidth = EfeWidth ; |
| 129 | |
| 130 | RawImage = (byte*) new char[ ( bitwidth * Height * ((Depth+7)>>3) ) ]; |
| 131 | imageOK = TRUE; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | wxPNGReader::~wxPNGReader ( ) |
| 136 | { |
| 137 | delete[] RawImage ; |
| 138 | if (lpbi) { |
| 139 | wxMacDestroyGWorld( (GWorldPtr) lpbi ) ; |
| 140 | } |
| 141 | delete m_palette; |
| 142 | } |
| 143 | |
| 144 | |
| 145 | int wxPNGReader::GetIndex(int x, int y) |
| 146 | { |
| 147 | if (!Inside(x, y) || (Depth>8)) return -1; |
| 148 | |
| 149 | ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3); |
| 150 | int index = (int)(*ImagePointer); |
| 151 | return index; |
| 152 | } |
| 153 | |
| 154 | bool wxPNGReader::GetRGB(int x, int y, byte* r, byte* g, byte* b) |
| 155 | { |
| 156 | if (!Inside(x, y)) return FALSE; |
| 157 | |
| 158 | if (m_palette) { |
| 159 | return m_palette->GetRGB(GetIndex(x, y), r, g, b); |
| 160 | /* PALETTEENTRY entry; |
| 161 | ::GetPaletteEntries((HPALETTE) m_palette->GetHPALETTE(), GetIndex(x, y), 1, &entry); |
| 162 | *r = entry.peRed; |
| 163 | *g = entry.peGreen; |
| 164 | *b = entry.peBlue; */ |
| 165 | } else { |
| 166 | ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3); |
| 167 | *b = ImagePointer[0]; |
| 168 | *g = ImagePointer[1]; |
| 169 | *r = ImagePointer[2]; |
| 170 | } |
| 171 | return TRUE; |
| 172 | } |
| 173 | |
| 174 | |
| 175 | bool wxPNGReader::SetIndex(int x, int y, int index) |
| 176 | { |
| 177 | if (!Inside(x, y) || (Depth>8)) return FALSE; |
| 178 | |
| 179 | ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3); |
| 180 | *ImagePointer = index; |
| 181 | |
| 182 | return TRUE; |
| 183 | } |
| 184 | |
| 185 | bool wxPNGReader::SetRGB(int x, int y, byte r, byte g, byte b) |
| 186 | { |
| 187 | if (!Inside(x, y)) return FALSE; |
| 188 | |
| 189 | if (ColorType & COLORTYPE_PALETTE) |
| 190 | { |
| 191 | if (!m_palette) return FALSE; |
| 192 | SetIndex(x, y, m_palette->GetPixel(r, g, b)); |
| 193 | |
| 194 | } else { |
| 195 | ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3); |
| 196 | ImagePointer[0] = b; |
| 197 | ImagePointer[1] = g; |
| 198 | ImagePointer[2] = r; |
| 199 | } |
| 200 | |
| 201 | return TRUE; |
| 202 | } |
| 203 | |
| 204 | bool wxPNGReader::SetPalette(wxPalette* colourmap) |
| 205 | { |
| 206 | delete m_palette ; |
| 207 | if (!colourmap) |
| 208 | return FALSE; |
| 209 | ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR); |
| 210 | m_palette = new wxPalette( *colourmap ); |
| 211 | return true ; |
| 212 | // return (DibSetUsage(lpbi, (HPALETTE) m_palette->GetHPALETTE(), WXIMA_COLORS ) != 0); |
| 213 | } |
| 214 | |
| 215 | bool |
| 216 | wxPNGReader::SetPalette(int n, byte *r, byte *g, byte *b) |
| 217 | { |
| 218 | delete m_palette ; |
| 219 | m_palette = new wxPalette(); |
| 220 | if (!m_palette) |
| 221 | return FALSE; |
| 222 | |
| 223 | if (!g) g = r; |
| 224 | if (!b) b = g; |
| 225 | m_palette->Create(n, r, g, b); |
| 226 | ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR); |
| 227 | return true ; |
| 228 | // return (DibSetUsage(lpbi, (HPALETTE) m_palette->GetHPALETTE(), WXIMA_COLORS ) != 0); |
| 229 | } |
| 230 | |
| 231 | bool |
| 232 | wxPNGReader::SetPalette(int n, rgb_color_struct *rgb_struct) |
| 233 | { |
| 234 | delete m_palette ; |
| 235 | m_palette = new wxPalette(); |
| 236 | if (!m_palette) |
| 237 | return FALSE; |
| 238 | |
| 239 | byte r[256], g[256], b[256]; |
| 240 | |
| 241 | for(int i=0; i<n; i++) |
| 242 | { |
| 243 | r[i] = rgb_struct[i].red; |
| 244 | g[i] = rgb_struct[i].green; |
| 245 | b[i] = rgb_struct[i].blue; |
| 246 | } |
| 247 | // Added by JACS copying from Andrew Davison's additions |
| 248 | // to GIF-reading code |
| 249 | // Make transparency colour black... |
| 250 | if (bgindex != -1) |
| 251 | r[bgindex] = g[bgindex] = b[bgindex] = 0; |
| 252 | |
| 253 | m_palette->Create(n, r, g, b); |
| 254 | ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR); |
| 255 | return true ; |
| 256 | // return (DibSetUsage(lpbi, (HPALETTE) m_palette->GetHPALETTE(), WXIMA_COLORS ) != 0); |
| 257 | } |
| 258 | |
| 259 | void wxPNGReader::NullData() |
| 260 | { |
| 261 | if (lpbi) { |
| 262 | wxMacDestroyGWorld( (GWorldPtr) lpbi ) ; |
| 263 | } |
| 264 | delete m_palette; |
| 265 | lpbi = NULL; |
| 266 | m_palette = NULL; |
| 267 | } |
| 268 | |
| 269 | wxBitmap* wxPNGReader::GetBitmap(void) |
| 270 | { |
| 271 | wxBitmap *bitmap = new wxBitmap; |
| 272 | if ( InstantiateBitmap(bitmap) ) |
| 273 | return bitmap; |
| 274 | else |
| 275 | { |
| 276 | delete bitmap; |
| 277 | return NULL; |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | bool wxPNGReader::InstantiateBitmap(wxBitmap *bitmap) |
| 282 | { |
| 283 | if ( lpbi ) |
| 284 | { |
| 285 | bitmap->SetHBITMAP((WXHBITMAP) lpbi); |
| 286 | bitmap->SetWidth(GetWidth()); |
| 287 | bitmap->SetHeight(GetHeight()); |
| 288 | bitmap->SetDepth(GetDepth()); |
| 289 | if ( GetDepth() > 1 && m_palette ) |
| 290 | bitmap->SetPalette(*m_palette); |
| 291 | bitmap->SetOk(TRUE); |
| 292 | |
| 293 | |
| 294 | // Make a mask if appropriate |
| 295 | /* |
| 296 | if ( bgindex > -1 ) |
| 297 | { |
| 298 | wxMask *mask = CreateMask(); |
| 299 | bitmap->SetMask(mask); |
| 300 | } |
| 301 | */ |
| 302 | lpbi = NULL ; // bitmap has taken over ownership |
| 303 | return TRUE; |
| 304 | } |
| 305 | else |
| 306 | { |
| 307 | return FALSE; |
| 308 | } |
| 309 | /* |
| 310 | HDC dc = ::CreateCompatibleDC(NULL); |
| 311 | |
| 312 | if (dc) |
| 313 | { |
| 314 | // tmpBitmap is a dummy, to satisfy ::CreateCompatibleDC (it |
| 315 | // is a memory dc that must have a bitmap selected into it) |
| 316 | HDC dc2 = GetDC(NULL); |
| 317 | HBITMAP tmpBitmap = ::CreateCompatibleBitmap(dc2, GetWidth(), GetHeight()); |
| 318 | ReleaseDC(NULL, dc2); |
| 319 | HBITMAP oldBitmap = (HBITMAP) ::SelectObject(dc, tmpBitmap); |
| 320 | |
| 321 | if ( m_palette ) |
| 322 | { |
| 323 | HPALETTE oldPal = ::SelectPalette(dc, (HPALETTE) m_palette->GetHPALETTE(), FALSE); |
| 324 | ::RealizePalette(dc); |
| 325 | } |
| 326 | |
| 327 | HBITMAP hBitmap = ::CreateDIBitmap(dc, lpbi, |
| 328 | CBM_INIT, RawImage, (LPBITMAPINFO) lpbi, DIB_PAL_COLORS); |
| 329 | |
| 330 | ::SelectPalette(dc, NULL, TRUE); |
| 331 | ::SelectObject(dc, oldBitmap); |
| 332 | ::DeleteObject(tmpBitmap); |
| 333 | ::DeleteDC(dc); |
| 334 | |
| 335 | if ( hBitmap ) |
| 336 | { |
| 337 | bitmap->SetHBITMAP((WXHBITMAP) hBitmap); |
| 338 | bitmap->SetWidth(GetWidth()); |
| 339 | bitmap->SetHeight(GetHeight()); |
| 340 | bitmap->SetDepth(GetDepth()); |
| 341 | if ( GetDepth() > 1 && m_palette ) |
| 342 | bitmap->SetPalette(*m_palette); |
| 343 | bitmap->SetOk(TRUE); |
| 344 | |
| 345 | |
| 346 | // Make a mask if appropriate |
| 347 | if ( bgindex > -1 ) |
| 348 | { |
| 349 | wxMask *mask = CreateMask(); |
| 350 | bitmap->SetMask(mask); |
| 351 | } |
| 352 | return TRUE; |
| 353 | } |
| 354 | else |
| 355 | { |
| 356 | return FALSE; |
| 357 | } |
| 358 | } |
| 359 | else |
| 360 | { |
| 361 | return FALSE; |
| 362 | } |
| 363 | */ |
| 364 | return false ; |
| 365 | } |
| 366 | |
| 367 | wxPalette *wxCopyPalette(const wxPalette *cmap) |
| 368 | { |
| 369 | wxPalette *newCmap = new wxPalette( *cmap ) ; |
| 370 | return newCmap; |
| 371 | } |
| 372 | |
| 373 | wxMask *wxPNGReader::CreateMask(void) |
| 374 | { |
| 375 | /* |
| 376 | HBITMAP hBitmap = ::CreateBitmap(GetWidth(), GetHeight(), 1, 1, NULL); |
| 377 | |
| 378 | HDC dc = ::CreateCompatibleDC(NULL); |
| 379 | HBITMAP oldBitmap = (HBITMAP) ::SelectObject(dc, hBitmap); |
| 380 | |
| 381 | int bgIndex = GetBGIndex(); |
| 382 | |
| 383 | int x,y; |
| 384 | |
| 385 | for (x=0; x<GetWidth(); x++) |
| 386 | { |
| 387 | for (y=0; y<GetHeight(); y++) |
| 388 | { |
| 389 | int index = GetIndex(x, y); |
| 390 | if ( index == bgIndex ) |
| 391 | ::SetPixel(dc, x, GetHeight() - y - 1, RGB(0, 0, 0)); |
| 392 | else |
| 393 | ::SetPixel(dc, x, GetHeight() - y - 1, RGB(255, 255, 255)); |
| 394 | |
| 395 | } |
| 396 | } |
| 397 | ::SelectObject(dc, oldBitmap); |
| 398 | wxMask *mask = new wxMask; |
| 399 | mask->SetMaskBitmap((WXHBITMAP) hBitmap); |
| 400 | return mask; |
| 401 | */ |
| 402 | return NULL ; |
| 403 | } |
| 404 | |
| 405 | bool wxPNGReader::ReadFile(char * ImageFileName) |
| 406 | { |
| 407 | int number_passes; |
| 408 | |
| 409 | if (ImageFileName) |
| 410 | strcpy(filename, ImageFileName); |
| 411 | |
| 412 | FILE *fp; |
| 413 | png_struct *png_ptr; |
| 414 | png_info *info_ptr; |
| 415 | wxPNGReaderIter iter(this); |
| 416 | |
| 417 | /* open the file */ |
| 418 | fp = fopen( ImageFileName , "rb" ); |
| 419 | |
| 420 | if (!fp) |
| 421 | return FALSE; |
| 422 | |
| 423 | /* allocate the necessary structures */ |
| 424 | png_ptr = new (png_struct); |
| 425 | if (!png_ptr) |
| 426 | { |
| 427 | fclose(fp); |
| 428 | return FALSE; |
| 429 | } |
| 430 | |
| 431 | info_ptr = new (png_info); |
| 432 | if (!info_ptr) |
| 433 | { |
| 434 | fclose(fp); |
| 435 | delete(png_ptr); |
| 436 | return FALSE; |
| 437 | } |
| 438 | /* set error handling */ |
| 439 | if (setjmp(png_ptr->jmpbuf)) |
| 440 | { |
| 441 | png_read_destroy(png_ptr, info_ptr, (png_info *)0); |
| 442 | fclose(fp); |
| 443 | delete(png_ptr); |
| 444 | delete(info_ptr); |
| 445 | |
| 446 | /* If we get here, we had a problem reading the file */ |
| 447 | return FALSE; |
| 448 | } |
| 449 | //png_set_error(ima_png_error, NULL); |
| 450 | |
| 451 | /* initialize the structures, info first for error handling */ |
| 452 | png_info_init(info_ptr); |
| 453 | png_read_init(png_ptr); |
| 454 | |
| 455 | /* set up the input control */ |
| 456 | png_init_io(png_ptr, fp); |
| 457 | |
| 458 | /* read the file information */ |
| 459 | png_read_info(png_ptr, info_ptr); |
| 460 | |
| 461 | /* allocate the memory to hold the image using the fields |
| 462 | of png_info. */ |
| 463 | png_color_16 my_background={ 0, 31, 127, 255, 0 }; |
| 464 | |
| 465 | if (info_ptr->valid & PNG_INFO_bKGD) |
| 466 | { |
| 467 | png_set_background(png_ptr, &(info_ptr->background), |
| 468 | PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); |
| 469 | if ( info_ptr->num_palette > 0 ) |
| 470 | bgindex = info_ptr->background.index; |
| 471 | } |
| 472 | else { |
| 473 | png_set_background(png_ptr, &my_background, |
| 474 | PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); |
| 475 | |
| 476 | // Added by JACS: guesswork! |
| 477 | if ( info_ptr->num_trans != 0 ) |
| 478 | bgindex = info_ptr->num_trans - 1 ; |
| 479 | } |
| 480 | |
| 481 | /* tell libpng to strip 16 bit depth files down to 8 bits */ |
| 482 | if (info_ptr->bit_depth == 16) |
| 483 | png_set_strip_16(png_ptr); |
| 484 | |
| 485 | int pixel_depth=(info_ptr->pixel_depth<24) ? info_ptr->pixel_depth: 24; |
| 486 | Create(info_ptr->width, info_ptr->height, pixel_depth, |
| 487 | info_ptr->color_type); |
| 488 | |
| 489 | if (info_ptr->num_palette>0) |
| 490 | { |
| 491 | SetPalette((int)info_ptr->num_palette, (rgb_color_struct*)info_ptr->palette); |
| 492 | } |
| 493 | |
| 494 | int row_stride = info_ptr->width * ((pixel_depth+7)>>3); |
| 495 | // printf("P = %d D = %d RS= %d ", info_ptr->num_palette, info_ptr->pixel_depth,row_stride); |
| 496 | // printf("CT = %d TRS = %d BD= %d ", info_ptr->color_type, info_ptr->valid & PNG_INFO_tRNS,info_ptr->bit_depth); |
| 497 | |
| 498 | byte *row_pointers = new byte[row_stride]; |
| 499 | |
| 500 | /* turn on interlace handling */ |
| 501 | if (info_ptr->interlace_type) |
| 502 | number_passes = png_set_interlace_handling(png_ptr); |
| 503 | else |
| 504 | number_passes = 1; |
| 505 | // printf("NP = %d ", number_passes); |
| 506 | |
| 507 | for (int pass=0; pass< number_passes; pass++) |
| 508 | { |
| 509 | iter.upset(); |
| 510 | int y=0; |
| 511 | CGrafPtr origPort ; |
| 512 | GDHandle origDevice ; |
| 513 | |
| 514 | GetGWorld( &origPort , &origDevice ) ; |
| 515 | // ignore shapedc |
| 516 | SetGWorld( (GWorldPtr) lpbi , NULL ) ; |
| 517 | do |
| 518 | { |
| 519 | // (unsigned char *)iter.GetRow(); |
| 520 | if (info_ptr->interlace_type) |
| 521 | { |
| 522 | if (pass>0) |
| 523 | iter.GetRow(row_pointers, row_stride); |
| 524 | png_read_row(png_ptr, row_pointers, NULL); |
| 525 | } |
| 526 | else |
| 527 | png_read_row(png_ptr, row_pointers, NULL); |
| 528 | |
| 529 | if ( info_ptr->palette ) |
| 530 | { |
| 531 | if ( pixel_depth == 8 ) |
| 532 | { |
| 533 | for ( int i = 0 ; i < info_ptr->width ; ++i ) |
| 534 | { |
| 535 | png_color_struct* color ; |
| 536 | RGBColor col ; |
| 537 | |
| 538 | int index = row_pointers[i] ; |
| 539 | color = &info_ptr->palette[index] ; |
| 540 | col.red = (((int)color->red) << 8) | ((int)color->red) ; |
| 541 | col.green = (((int)color->green) << 8) | ((int)color->green) ; |
| 542 | col.blue = (((int)color->blue) << 8) | ((int)color->blue) ; |
| 543 | SetCPixel( i, y, &col); |
| 544 | } |
| 545 | /* |
| 546 | png_color_struct* color ; |
| 547 | RGBColor col ; |
| 548 | unsigned char* p = &row_pointers[0] ; |
| 549 | PenNormal() ; |
| 550 | MoveTo( 0 , y ) ; |
| 551 | int index = *p ; |
| 552 | color = &info_ptr->palette[index] ; |
| 553 | col.red = (color->red << 8) | color->red ; |
| 554 | col.green = (color->green << 8) | color->green ; |
| 555 | col.blue = (color->blue << 8) | color->blue ; |
| 556 | RGBForeColor( &col ) ; |
| 557 | col.red = col.green = col.blue = 0xFFFF ; |
| 558 | RGBBackColor( &col ) ; |
| 559 | for ( int i = 0 ; i < info_ptr->width ; ++i , ++p) |
| 560 | { |
| 561 | if ( *p != index ) |
| 562 | { |
| 563 | LineTo( i , y ) ; |
| 564 | index = *p ; |
| 565 | color = &info_ptr->palette[index] ; |
| 566 | col.red = (((int)color->red) << 8) | ((int)color->red) ; |
| 567 | col.green = (((int)color->green) << 8) | ((int)color->green) ; |
| 568 | col.blue = (((int)color->blue) << 8) | ((int)color->blue) ; |
| 569 | RGBForeColor( &col ) ; |
| 570 | } |
| 571 | } |
| 572 | LineTo( info_ptr->width , y ) ; |
| 573 | */ |
| 574 | } |
| 575 | else |
| 576 | { |
| 577 | for ( int i = 0 ; i < info_ptr->width ; ++i ) |
| 578 | { |
| 579 | png_color_struct* color ; |
| 580 | RGBColor col ; |
| 581 | |
| 582 | int byte = ( i * pixel_depth ) / 8 ; |
| 583 | int offset = ( 8 - pixel_depth ) - ( i * pixel_depth ) % 8 ; |
| 584 | |
| 585 | int index = ( row_pointers[byte] >> offset ) & ( 0xFF >> ( 8 - pixel_depth ) ); |
| 586 | color = &info_ptr->palette[index] ; |
| 587 | col.red = (((int)color->red) << 8) | ((int)color->red) ; |
| 588 | col.green = (((int)color->green) << 8) | ((int)color->green) ; |
| 589 | col.blue = (((int)color->blue) << 8) | ((int)color->blue) ; |
| 590 | SetCPixel( i, y, &col); |
| 591 | } |
| 592 | } |
| 593 | } |
| 594 | else |
| 595 | { |
| 596 | for ( int i = 0 ; i < info_ptr->width ; ++i ) |
| 597 | { |
| 598 | png_color_struct* color ; |
| 599 | RGBColor col ; |
| 600 | color =(png_color_struct*) (&row_pointers[i*3]) ; |
| 601 | col.red = (((int)color->red) << 8) | ((int)color->red) ; |
| 602 | col.green = (((int)color->green) << 8) | ((int)color->green) ; |
| 603 | col.blue = (((int)color->blue) << 8) | ((int)color->blue) ; |
| 604 | SetCPixel( i, y, &col); |
| 605 | } |
| 606 | } |
| 607 | if (number_passes) |
| 608 | iter.SetRow(row_pointers, row_stride); |
| 609 | y++; |
| 610 | } |
| 611 | while(iter.PrevRow()); |
| 612 | SetGWorld( origPort , origDevice ) ; |
| 613 | |
| 614 | // printf("Y=%d ",y); |
| 615 | } |
| 616 | delete[] row_pointers; |
| 617 | |
| 618 | /* read the rest of the file, getting any additional chunks |
| 619 | in info_ptr */ |
| 620 | png_read_end(png_ptr, info_ptr); |
| 621 | |
| 622 | /* clean up after the read, and free any memory allocated */ |
| 623 | png_read_destroy(png_ptr, info_ptr, (png_info *)0); |
| 624 | |
| 625 | /* free the structures */ |
| 626 | delete(png_ptr); |
| 627 | delete(info_ptr); |
| 628 | |
| 629 | /* close the file */ |
| 630 | fclose(fp); |
| 631 | |
| 632 | /* that's it */ |
| 633 | return TRUE; |
| 634 | } |
| 635 | |
| 636 | |
| 637 | /* write a png file */ |
| 638 | |
| 639 | bool wxPNGReader::SaveFile(char * ImageFileName) |
| 640 | { |
| 641 | if (ImageFileName) |
| 642 | strcpy(filename, ImageFileName); |
| 643 | |
| 644 | wxPNGReaderIter iter(this); |
| 645 | FILE *fp; |
| 646 | png_struct *png_ptr; |
| 647 | png_info *info_ptr; |
| 648 | |
| 649 | /* open the file */ |
| 650 | fp = fopen(filename, "wb"); |
| 651 | if (!fp) |
| 652 | return FALSE; |
| 653 | |
| 654 | /* allocate the necessary structures */ |
| 655 | png_ptr = new (png_struct); |
| 656 | if (!png_ptr) |
| 657 | { |
| 658 | fclose(fp); |
| 659 | return FALSE; |
| 660 | } |
| 661 | |
| 662 | info_ptr = new (png_info); |
| 663 | if (!info_ptr) |
| 664 | { |
| 665 | fclose(fp); |
| 666 | delete(png_ptr); |
| 667 | return FALSE; |
| 668 | } |
| 669 | |
| 670 | /* set error handling */ |
| 671 | if (setjmp(png_ptr->jmpbuf)) |
| 672 | { |
| 673 | png_write_destroy(png_ptr); |
| 674 | fclose(fp); |
| 675 | delete(png_ptr); |
| 676 | delete(info_ptr); |
| 677 | |
| 678 | /* If we get here, we had a problem reading the file */ |
| 679 | return FALSE; |
| 680 | } |
| 681 | //png_set_error(ima_png_error, NULL); |
| 682 | |
| 683 | // printf("writig pg %s ", filename); |
| 684 | /* initialize the structures */ |
| 685 | png_info_init(info_ptr); |
| 686 | png_write_init(png_ptr); |
| 687 | |
| 688 | int row_stride = GetWidth() * ((GetDepth()+7)>>3); |
| 689 | /* set up the output control */ |
| 690 | png_init_io(png_ptr, fp); |
| 691 | |
| 692 | /* set the file information here */ |
| 693 | info_ptr->width = GetWidth(); |
| 694 | info_ptr->height = GetHeight(); |
| 695 | info_ptr->pixel_depth = GetDepth(); |
| 696 | info_ptr->channels = (GetDepth()>8) ? 3: 1; |
| 697 | info_ptr->bit_depth = GetDepth()/info_ptr->channels; |
| 698 | info_ptr->color_type = GetColorType(); |
| 699 | info_ptr->compression_type = info_ptr->filter_type = info_ptr->interlace_type=0; |
| 700 | info_ptr->valid = 0; |
| 701 | info_ptr->rowbytes = row_stride; |
| 702 | |
| 703 | |
| 704 | // printf("P = %d D = %d RS= %d GD= %d CH= %d ", info_ptr->pixel_depth, info_ptr->bit_depth, row_stride, GetDepth(), info_ptr->channels); |
| 705 | /* set the palette if there is one */ |
| 706 | if ((GetColorType() & COLORTYPE_PALETTE) && GetPalette()) |
| 707 | { |
| 708 | // printf("writing paleta[%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette()); |
| 709 | info_ptr->valid |= PNG_INFO_PLTE; |
| 710 | info_ptr->palette = new png_color[256]; |
| 711 | info_ptr->num_palette = 256; |
| 712 | for (int i=0; i<256; i++) |
| 713 | GetPalette()->GetRGB(i, &info_ptr->palette[i].red, &info_ptr->palette[i].green, &info_ptr->palette[i].blue); |
| 714 | } |
| 715 | // printf("Paleta [%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette()); |
| 716 | |
| 717 | |
| 718 | /* optional significant bit chunk */ |
| 719 | // info_ptr->valid |= PNG_INFO_sBIT; |
| 720 | // info_ptr->sig_bit = true_bit_depth; |
| 721 | |
| 722 | /* optional gamma chunk */ |
| 723 | // info_ptr->valid |= PNG_INFO_gAMA; |
| 724 | // info_ptr->gamma = gamma; |
| 725 | |
| 726 | /* other optional chunks */ |
| 727 | |
| 728 | /* write the file information */ |
| 729 | png_write_info(png_ptr, info_ptr); |
| 730 | |
| 731 | /* set up the transformations you want. Note that these are |
| 732 | all optional. Only call them if you want them */ |
| 733 | |
| 734 | /* shift the pixels up to a legal bit depth and fill in |
| 735 | as appropriate to correctly scale the image */ |
| 736 | // png_set_shift(png_ptr, &(info_ptr->sig_bit)); |
| 737 | |
| 738 | /* pack pixels into bytes */ |
| 739 | // png_set_packing(png_ptr); |
| 740 | |
| 741 | /* flip bgr pixels to rgb */ |
| 742 | // png_set_bgr(png_ptr); |
| 743 | |
| 744 | /* swap bytes of 16 bit files to most significant bit first */ |
| 745 | // png_set_swap(png_ptr); |
| 746 | |
| 747 | /* get rid of filler bytes, pack rgb into 3 bytes */ |
| 748 | // png_set_rgbx(png_ptr); |
| 749 | |
| 750 | /* If you are only writing one row at a time, this works */ |
| 751 | |
| 752 | byte *row_pointers = new byte[row_stride]; |
| 753 | iter.upset(); |
| 754 | do { |
| 755 | // (unsigned char *)iter.GetRow(); |
| 756 | iter.GetRow(row_pointers, row_stride); |
| 757 | png_write_row(png_ptr, row_pointers); |
| 758 | } while(iter.PrevRow()); |
| 759 | |
| 760 | delete[] row_pointers; |
| 761 | |
| 762 | /* write the rest of the file */ |
| 763 | png_write_end(png_ptr, info_ptr); |
| 764 | |
| 765 | /* clean up after the write, and free any memory allocated */ |
| 766 | png_write_destroy(png_ptr); |
| 767 | |
| 768 | /* if you malloced the palette, free it here */ |
| 769 | if (info_ptr->palette) |
| 770 | delete[] (info_ptr->palette); |
| 771 | |
| 772 | /* free the structures */ |
| 773 | delete(png_ptr); |
| 774 | delete(info_ptr); |
| 775 | |
| 776 | /* close the file */ |
| 777 | fclose(fp); |
| 778 | |
| 779 | /* that's it */ |
| 780 | return TRUE; |
| 781 | } |
| 782 | |
| 783 | static int Power(int x, int y) |
| 784 | { |
| 785 | int z = 1; |
| 786 | int i; |
| 787 | for ( i = 0; i < y; i++) |
| 788 | { |
| 789 | z *= x; |
| 790 | } |
| 791 | return z; |
| 792 | } |
| 793 | |
| 794 | static char hexArray[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', |
| 795 | 'C', 'D', 'E', 'F' }; |
| 796 | |
| 797 | static void DecToHex(int dec, char *buf) |
| 798 | { |
| 799 | int firstDigit = (int)(dec/16.0); |
| 800 | int secondDigit = (int)(dec - (firstDigit*16.0)); |
| 801 | buf[0] = hexArray[firstDigit]; |
| 802 | buf[1] = hexArray[secondDigit]; |
| 803 | buf[2] = 0; |
| 804 | } |
| 805 | |
| 806 | |
| 807 | bool wxPNGReader::SaveXPM(char *filename, char *name) |
| 808 | { |
| 809 | char nameStr[256]; |
| 810 | if ( name ) |
| 811 | strcpy(nameStr, name); |
| 812 | else |
| 813 | { |
| 814 | strcpy(nameStr, filename); |
| 815 | wxStripExtension(nameStr); |
| 816 | } |
| 817 | |
| 818 | if ( GetDepth() > 4 ) |
| 819 | { |
| 820 | // Only a depth of 4 and below allowed |
| 821 | return FALSE; |
| 822 | } |
| 823 | |
| 824 | if ( !GetPalette() ) |
| 825 | return FALSE; |
| 826 | |
| 827 | wxSTD ofstream str(filename); |
| 828 | if ( str.bad() ) |
| 829 | return FALSE; |
| 830 | |
| 831 | int noColours = Power(2, GetDepth()); |
| 832 | |
| 833 | // Output header |
| 834 | str << "/* XPM */\n"; |
| 835 | str << "static char * " << nameStr << "_xpm[] = {\n"; |
| 836 | str << "\"" << GetWidth() << " " << GetHeight() << " " << noColours << " 1\",\n"; |
| 837 | |
| 838 | // Output colourmap |
| 839 | int base = 97 ; // start from 'a' |
| 840 | |
| 841 | unsigned char red, green, blue; |
| 842 | char hexBuf[4]; |
| 843 | int i; |
| 844 | for ( i = 0; i < noColours; i ++) |
| 845 | { |
| 846 | str << "\"" << (char)(base + i) << " c #"; |
| 847 | GetPalette()->GetRGB(i, &red, &green, &blue); |
| 848 | DecToHex(red, hexBuf); |
| 849 | str << hexBuf; |
| 850 | DecToHex(green, hexBuf); |
| 851 | str << hexBuf; |
| 852 | DecToHex(blue, hexBuf); |
| 853 | str << hexBuf; |
| 854 | str << "\",\n"; |
| 855 | } |
| 856 | |
| 857 | // Output the data |
| 858 | int x, y; |
| 859 | for ( y = 0; y < GetHeight(); y++) |
| 860 | { |
| 861 | str << "\""; |
| 862 | for ( x = 0; x < GetWidth(); x++) |
| 863 | { |
| 864 | int index = GetIndex(x, y); |
| 865 | str << (char)(base + index) ; |
| 866 | } |
| 867 | str << "\",\n"; |
| 868 | } |
| 869 | |
| 870 | str << "};\n"; |
| 871 | str.flush(); |
| 872 | |
| 873 | return TRUE; |
| 874 | } |
| 875 | |
| 876 | |
| 877 | IMPLEMENT_DYNAMIC_CLASS(wxPNGFileHandler, wxBitmapHandler) |
| 878 | |
| 879 | bool wxPNGFileHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags, |
| 880 | int desiredWidth, int desiredHeight) |
| 881 | { |
| 882 | wxPNGReader reader; |
| 883 | if (reader.ReadFile((char*) (const char*) name)) |
| 884 | { |
| 885 | return reader.InstantiateBitmap(bitmap); |
| 886 | } |
| 887 | else |
| 888 | return FALSE; |
| 889 | } |
| 890 | |
| 891 | bool wxPNGFileHandler::SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *pal) |
| 892 | { |
| 893 | return FALSE; |
| 894 | } |
| 895 | |
| 896 | |