| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: pnghand.cpp |
| 3 | // Purpose: Implements a PNG reader class + handler |
| 4 | // Author: David Webster |
| 5 | // Modified by: |
| 6 | // Created: 10/10/99 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) David Webster |
| 9 | // Licence: wxWindows license |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // For compilers that support precompilation, includes "wx.h". |
| 13 | #include "wx/wxprec.h" |
| 14 | |
| 15 | #include <stdlib.h> |
| 16 | #include <stdio.h> |
| 17 | #include <string.h> |
| 18 | |
| 19 | #if wxUSE_IOSTREAMH |
| 20 | # include <fstream.h> |
| 21 | #else |
| 22 | # include <fstream> |
| 23 | #endif |
| 24 | |
| 25 | #define INCL_PM |
| 26 | #include <os2.h> |
| 27 | |
| 28 | #include "wx/palette.h" |
| 29 | #include "wx/bitmap.h" |
| 30 | #include "wx/utils.h" |
| 31 | |
| 32 | #include "wx/os2/pngread.h" |
| 33 | |
| 34 | extern "C" { |
| 35 | #include "png.h" |
| 36 | } |
| 37 | |
| 38 | extern "C" void png_read_init PNGARG((png_structp png_ptr)); |
| 39 | extern "C" void png_write_init PNGARG((png_structp png_ptr)); |
| 40 | |
| 41 | #ifndef GlobalAllocPtr |
| 42 | #define GlobalPtrHandle(lp) \ |
| 43 | ((HGLOBAL)GlobalHandle(lp)) |
| 44 | |
| 45 | #define GlobalLockPtr(lp) \ |
| 46 | ((BOOL)GlobalLock(GlobalPtrHandle(lp))) |
| 47 | #define GlobalUnlockPtr(lp) \ |
| 48 | GlobalUnlock(GlobalPtrHandle(lp)) |
| 49 | |
| 50 | #define GlobalAllocPtr(flags, cb) \ |
| 51 | (GlobalLock(GlobalAlloc((flags), (cb)))) |
| 52 | #define GlobalReAllocPtr(lp, cbNew, flags) \ |
| 53 | (GlobalUnlockPtr(lp), GlobalLock(GlobalReAlloc(GlobalPtrHandle(lp) , (cbNew), (flags)))) |
| 54 | #define GlobalFreePtr(lp) \ |
| 55 | (GlobalUnlockPtr(lp), (BOOL)GlobalFree(GlobalPtrHandle(lp))) |
| 56 | #endif |
| 57 | |
| 58 | |
| 59 | void ima_png_error(png_struct *png_ptr, char *message) |
| 60 | { |
| 61 | // wxMessageBox(message, "PNG error"); |
| 62 | |
| 63 | longjmp(png_ptr->jmpbuf, 1); |
| 64 | } |
| 65 | |
| 66 | |
| 67 | // static wxGifReaderIter* iter; |
| 68 | wxPalette *wxCopyPalette(const wxPalette *cmap); |
| 69 | |
| 70 | wxPNGReader::wxPNGReader() |
| 71 | { |
| 72 | filetype = 0; |
| 73 | RawImage = NULL; // Image data |
| 74 | |
| 75 | Width = 0; Height = 0; // Dimensions |
| 76 | Depth = 0; // (bits x pixel) |
| 77 | ColorType = 0; // Bit 1 = Palette used |
| 78 | // Bit 2 = Color used |
| 79 | // Bit 3 = Alpha used |
| 80 | |
| 81 | EfeWidth = 0; // Efective Width |
| 82 | |
| 83 | lpbi = NULL; |
| 84 | bgindex = -1; |
| 85 | Palette = 0; |
| 86 | imageOK = FALSE; |
| 87 | } |
| 88 | |
| 89 | wxPNGReader::wxPNGReader ( wxChar* ImageFileName ) |
| 90 | { |
| 91 | imageOK = FALSE; |
| 92 | filetype = 0; |
| 93 | RawImage = NULL; // Image data |
| 94 | |
| 95 | Width = 0; Height = 0; // Dimensions |
| 96 | Depth = 0; // (bits x pixel) |
| 97 | ColorType = 0; // Bit 1 = Palette used |
| 98 | // Bit 2 = Color used |
| 99 | // Bit 3 = Alpha used |
| 100 | |
| 101 | EfeWidth = 0; // Efective Width |
| 102 | |
| 103 | lpbi = NULL; |
| 104 | bgindex = -1; |
| 105 | Palette = 0; |
| 106 | |
| 107 | imageOK = ReadFile (ImageFileName); |
| 108 | } |
| 109 | |
| 110 | void |
| 111 | wxPNGReader::Create(int width, int height, int depth, int colortype) |
| 112 | { |
| 113 | Width = width; Height = height; Depth = depth; |
| 114 | ColorType = (colortype>=0) ? colortype: ((Depth>8) ? COLORTYPE_COLOR: 0); |
| 115 | |
| 116 | if (lpbi) { |
| 117 | // GlobalFreePtr(lpbi); |
| 118 | // delete Palette; |
| 119 | } |
| 120 | RawImage = 0; |
| 121 | Palette = 0; |
| 122 | lpbi = 0; // TODO: wxDibCreate(Depth, Width, Height); |
| 123 | if (lpbi) { |
| 124 | RawImage = 0; //TODO: (ImagePointerType)wxDibPtr(lpbi); |
| 125 | EfeWidth = (long)(((long)Width*Depth + 31) / 32) * 4; |
| 126 | imageOK = TRUE; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | wxPNGReader::~wxPNGReader ( ) |
| 131 | { |
| 132 | if (lpbi) { |
| 133 | // TODO: GlobalFreePtr(lpbi); |
| 134 | delete Palette; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | |
| 139 | int wxPNGReader::GetIndex(int x, int y) |
| 140 | { |
| 141 | if (!Inside(x, y) || (Depth>8)) return -1; |
| 142 | |
| 143 | ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3); |
| 144 | int index = (int)(*ImagePointer); |
| 145 | return index; |
| 146 | } |
| 147 | |
| 148 | bool wxPNGReader::GetRGB(int x, int y, byte* r, byte* g, byte* b) |
| 149 | { |
| 150 | if (!Inside(x, y)) return FALSE; |
| 151 | |
| 152 | if (Palette) { |
| 153 | return Palette->GetRGB(GetIndex(x, y), r, g, b); |
| 154 | /* PALETTEENTRY entry; |
| 155 | ::GetPaletteEntries((HPALETTE) Palette->GetHPALETTE(), GetIndex(x, y), 1, &entry); |
| 156 | *r = entry.peRed; |
| 157 | *g = entry.peGreen; |
| 158 | *b = entry.peBlue; */ |
| 159 | } else { |
| 160 | ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3); |
| 161 | *b = ImagePointer[0]; |
| 162 | *g = ImagePointer[1]; |
| 163 | *r = ImagePointer[2]; |
| 164 | } |
| 165 | return TRUE; |
| 166 | } |
| 167 | |
| 168 | |
| 169 | bool wxPNGReader::SetIndex(int x, int y, int index) |
| 170 | { |
| 171 | if (!Inside(x, y) || (Depth>8)) return FALSE; |
| 172 | |
| 173 | ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3); |
| 174 | *ImagePointer = index; |
| 175 | |
| 176 | return TRUE; |
| 177 | } |
| 178 | |
| 179 | bool wxPNGReader::SetRGB(int x, int y, byte r, byte g, byte b) |
| 180 | { |
| 181 | if (!Inside(x, y)) return FALSE; |
| 182 | |
| 183 | if (ColorType & COLORTYPE_PALETTE) |
| 184 | { |
| 185 | if (!Palette) return FALSE; |
| 186 | SetIndex(x, y, Palette->GetPixel(r, g, b)); |
| 187 | |
| 188 | } else { |
| 189 | ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3); |
| 190 | ImagePointer[0] = b; |
| 191 | ImagePointer[1] = g; |
| 192 | ImagePointer[2] = r; |
| 193 | } |
| 194 | |
| 195 | return TRUE; |
| 196 | } |
| 197 | |
| 198 | bool wxPNGReader::SetPalette(wxPalette* colourmap) |
| 199 | { |
| 200 | if (!colourmap) |
| 201 | return FALSE; |
| 202 | ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR); |
| 203 | Palette = colourmap; |
| 204 | // TODO: return (wxDibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0); |
| 205 | return FALSE; |
| 206 | } |
| 207 | |
| 208 | bool |
| 209 | wxPNGReader::SetPalette(int n, byte *r, byte *g, byte *b) |
| 210 | { |
| 211 | Palette = new wxPalette(); |
| 212 | if (!Palette) |
| 213 | return FALSE; |
| 214 | |
| 215 | if (!g) g = r; |
| 216 | if (!b) b = g; |
| 217 | Palette->Create(n, r, g, b); |
| 218 | ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR); |
| 219 | // TODO: return (wxDibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0); |
| 220 | return FALSE; |
| 221 | } |
| 222 | |
| 223 | bool |
| 224 | wxPNGReader::SetPalette(int n, rgb_color_struct *rgb_struct) |
| 225 | { |
| 226 | Palette = new wxPalette(); |
| 227 | if (!Palette) |
| 228 | return FALSE; |
| 229 | |
| 230 | byte r[256], g[256], b[256]; |
| 231 | |
| 232 | for(int i=0; i<n; i++) |
| 233 | { |
| 234 | r[i] = rgb_struct[i].red; |
| 235 | g[i] = rgb_struct[i].green; |
| 236 | b[i] = rgb_struct[i].blue; |
| 237 | } |
| 238 | // Added by JACS copying from Andrew Davison's additions |
| 239 | // to GIF-reading code |
| 240 | // Make transparency colour black... |
| 241 | if (bgindex != -1) |
| 242 | r[bgindex] = g[bgindex] = b[bgindex] = 0; |
| 243 | |
| 244 | Palette->Create(n, r, g, b); |
| 245 | ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR); |
| 246 | // TODO: return (wxDibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0); |
| 247 | return FALSE; |
| 248 | } |
| 249 | |
| 250 | void wxPNGReader::NullData() |
| 251 | { |
| 252 | lpbi = NULL; |
| 253 | Palette = NULL; |
| 254 | } |
| 255 | |
| 256 | wxBitmap* wxPNGReader::GetBitmap() |
| 257 | { |
| 258 | wxBitmap *bitmap = new wxBitmap; |
| 259 | if ( InstantiateBitmap(bitmap) ) |
| 260 | return bitmap; |
| 261 | else |
| 262 | { |
| 263 | delete bitmap; |
| 264 | return NULL; |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | bool wxPNGReader::InstantiateBitmap(wxBitmap *bitmap) |
| 269 | { |
| 270 | // TODO: |
| 271 | /* |
| 272 | HDC dc = ::CreateCompatibleDC(NULL); |
| 273 | |
| 274 | if (dc) |
| 275 | { |
| 276 | // tmpBitmap is a dummy, to satisfy ::CreateCompatibleDC (it |
| 277 | // is a memory dc that must have a bitmap selected into it) |
| 278 | HDC dc2 = GetDC(NULL); |
| 279 | HBITMAP tmpBitmap = ::CreateCompatibleBitmap(dc2, GetWidth(), GetHeight()); |
| 280 | ReleaseDC(NULL, dc2); |
| 281 | HBITMAP oldBitmap = (HBITMAP) ::SelectObject(dc, tmpBitmap); |
| 282 | |
| 283 | if ( Palette ) |
| 284 | { |
| 285 | ::SelectPalette(dc, (HPALETTE) Palette->GetHPALETTE(), FALSE); |
| 286 | ::RealizePalette(dc); |
| 287 | } |
| 288 | |
| 289 | HBITMAP hBitmap = ::CreateDIBitmap(dc, lpbi, |
| 290 | CBM_INIT, RawImage, (LPBITMAPINFO) lpbi, DIB_PAL_COLORS); |
| 291 | |
| 292 | ::SelectPalette(dc, NULL, TRUE); |
| 293 | ::SelectObject(dc, oldBitmap); |
| 294 | ::DeleteObject(tmpBitmap); |
| 295 | ::DeleteDC(dc); |
| 296 | |
| 297 | if ( hBitmap ) |
| 298 | { |
| 299 | bitmap->SetHBITMAP((WXHBITMAP) hBitmap); |
| 300 | bitmap->SetWidth(GetWidth()); |
| 301 | bitmap->SetHeight(GetHeight()); |
| 302 | bitmap->SetDepth(GetDepth()); |
| 303 | if ( GetDepth() > 1 && Palette ) |
| 304 | bitmap->SetPalette(*Palette); |
| 305 | bitmap->SetOk(TRUE); |
| 306 | |
| 307 | |
| 308 | // Make a mask if appropriate |
| 309 | if ( bgindex > -1 ) |
| 310 | { |
| 311 | wxMask *mask = CreateMask(); |
| 312 | bitmap->SetMask(mask); |
| 313 | } |
| 314 | return TRUE; |
| 315 | } |
| 316 | else |
| 317 | { |
| 318 | return FALSE; |
| 319 | } |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | return FALSE; |
| 324 | } |
| 325 | */ |
| 326 | return FALSE; |
| 327 | } |
| 328 | |
| 329 | wxPalette *wxCopyPalette(const wxPalette *cmap) |
| 330 | { |
| 331 | // To get number of entries... |
| 332 | WORD count = 0; |
| 333 | // TODO: ::GetObject((HPALETTE) cmap->GetHPALETTE(), sizeof(WORD), &count); |
| 334 | // TODO: |
| 335 | /* |
| 336 | LOGPALETTE* logPal = (LOGPALETTE*) |
| 337 | new BYTE[sizeof(LOGPALETTE) + count*sizeof(PALETTEENTRY)]; |
| 338 | logPal->palVersion = 0x300; |
| 339 | logPal->palNumEntries = count; |
| 340 | ::GetPaletteEntries((HPALETTE) cmap->GetHPALETTE(), 0, count, logPal->palPalEntry); |
| 341 | |
| 342 | HPALETTE hPalette = ::CreatePalette(logPal); |
| 343 | delete[] logPal; |
| 344 | */ |
| 345 | wxPalette *newCmap = new wxPalette; |
| 346 | // TODO: newCmap->SetHPALETTE((WXHPALETTE) hPalette); |
| 347 | return newCmap; |
| 348 | } |
| 349 | |
| 350 | wxMask *wxPNGReader::CreateMask() |
| 351 | { |
| 352 | // TODO: |
| 353 | /* |
| 354 | HBITMAP hBitmap = ::CreateBitmap(GetWidth(), GetHeight(), 1, 1, NULL); |
| 355 | |
| 356 | HDC dc = ::CreateCompatibleDC(NULL); |
| 357 | HBITMAP oldBitmap = (HBITMAP) ::SelectObject(dc, hBitmap); |
| 358 | |
| 359 | int bgIndex = GetBGIndex(); |
| 360 | |
| 361 | int x,y; |
| 362 | |
| 363 | for (x=0; x<GetWidth(); x++) |
| 364 | { |
| 365 | for (y=0; y<GetHeight(); y++) |
| 366 | { |
| 367 | int index = GetIndex(x, y); |
| 368 | if ( index == bgIndex ) |
| 369 | ::SetPixel(dc, x, GetHeight() - y - 1, RGB(0, 0, 0)); |
| 370 | else |
| 371 | ::SetPixel(dc, x, GetHeight() - y - 1, RGB(255, 255, 255)); |
| 372 | |
| 373 | } |
| 374 | } |
| 375 | ::SelectObject(dc, oldBitmap); |
| 376 | */ |
| 377 | wxMask *mask = new wxMask; |
| 378 | // TODO: mask->SetMaskBitmap((WXHBITMAP) hBitmap); |
| 379 | return mask; |
| 380 | } |
| 381 | |
| 382 | bool wxPNGReader::ReadFile(wxChar * ImageFileName) |
| 383 | { |
| 384 | if (ImageFileName) |
| 385 | wxStrcpy(filename, ImageFileName); |
| 386 | |
| 387 | /* open the file */ |
| 388 | FILE *fp = fopen(wxConvFile.cWX2MB(filename), "rb"); |
| 389 | if (!fp) |
| 390 | return FALSE; |
| 391 | |
| 392 | /* allocate the necessary structures */ |
| 393 | png_struct *png_ptr = new (png_struct); |
| 394 | if (!png_ptr) |
| 395 | { |
| 396 | fclose(fp); |
| 397 | return FALSE; |
| 398 | } |
| 399 | |
| 400 | png_info *info_ptr = new (png_info); |
| 401 | if (!info_ptr) |
| 402 | { |
| 403 | fclose(fp); |
| 404 | delete(png_ptr); |
| 405 | return FALSE; |
| 406 | } |
| 407 | |
| 408 | /* set error handling */ |
| 409 | if (setjmp(png_ptr->jmpbuf)) |
| 410 | { |
| 411 | png_read_destroy(png_ptr, info_ptr, (png_info *)0); |
| 412 | fclose(fp); |
| 413 | delete(png_ptr); |
| 414 | delete(info_ptr); |
| 415 | |
| 416 | /* If we get here, we had a problem reading the file */ |
| 417 | return FALSE; |
| 418 | } |
| 419 | //png_set_error(ima_png_error, NULL); |
| 420 | |
| 421 | /* initialize the structures, info first for error handling */ |
| 422 | png_info_init(info_ptr); |
| 423 | png_read_init(png_ptr); |
| 424 | |
| 425 | /* set up the input control */ |
| 426 | png_init_io(png_ptr, fp); |
| 427 | |
| 428 | /* read the file information */ |
| 429 | png_read_info(png_ptr, info_ptr); |
| 430 | |
| 431 | /* allocate the memory to hold the image using the fields |
| 432 | of png_info. */ |
| 433 | png_color_16 my_background={ 0, 31, 127, 255, 0 }; |
| 434 | |
| 435 | if (info_ptr->valid & PNG_INFO_bKGD) |
| 436 | { |
| 437 | png_set_background(png_ptr, &(info_ptr->background), |
| 438 | PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); |
| 439 | if ( info_ptr->num_palette > 0 ) |
| 440 | bgindex = info_ptr->background.index; |
| 441 | } |
| 442 | else { |
| 443 | png_set_background(png_ptr, &my_background, |
| 444 | PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); |
| 445 | |
| 446 | // Added by JACS: guesswork! |
| 447 | if ( info_ptr->num_trans != 0 ) |
| 448 | bgindex = info_ptr->num_trans - 1 ; |
| 449 | } |
| 450 | |
| 451 | /* tell libpng to strip 16 bit depth files down to 8 bits */ |
| 452 | if (info_ptr->bit_depth == 16) |
| 453 | png_set_strip_16(png_ptr); |
| 454 | |
| 455 | int pixel_depth=(info_ptr->pixel_depth<24) ? info_ptr->pixel_depth: 24; |
| 456 | Create(info_ptr->width, info_ptr->height, pixel_depth, |
| 457 | info_ptr->color_type); |
| 458 | |
| 459 | if (info_ptr->num_palette>0) |
| 460 | { |
| 461 | SetPalette((int)info_ptr->num_palette, (rgb_color_struct*)info_ptr->palette); |
| 462 | } |
| 463 | |
| 464 | int row_stride = info_ptr->width * ((pixel_depth+7)>>3); |
| 465 | // printf("P = %d D = %d RS= %d ", info_ptr->num_palette, info_ptr->pixel_depth,row_stride); |
| 466 | // printf("CT = %d TRS = %d BD= %d ", info_ptr->color_type, info_ptr->valid & PNG_INFO_tRNS,info_ptr->bit_depth); |
| 467 | |
| 468 | byte *row_pointers = new byte[row_stride]; |
| 469 | |
| 470 | /* turn on interlace handling */ |
| 471 | int number_passes; |
| 472 | if (info_ptr->interlace_type) |
| 473 | number_passes = png_set_interlace_handling(png_ptr); |
| 474 | else |
| 475 | number_passes = 1; |
| 476 | // printf("NP = %d ", number_passes); |
| 477 | |
| 478 | // don't use the object to prevent warnings from VC++ about "unportable |
| 479 | // interaction between setjmp and C++ object destruction" (this is a correct |
| 480 | // warning, of course!) |
| 481 | wxPNGReaderIter *iter = new wxPNGReaderIter(this); |
| 482 | for (int pass=0; pass< number_passes; pass++) |
| 483 | { |
| 484 | iter->upset(); |
| 485 | int y=0; |
| 486 | do { |
| 487 | //(unsigned char *)iter.GetRow(); |
| 488 | if (info_ptr->interlace_type) { |
| 489 | if (pass>0) |
| 490 | iter->GetRow(row_pointers, row_stride); |
| 491 | png_read_row(png_ptr, row_pointers, NULL); |
| 492 | } |
| 493 | else |
| 494 | png_read_row(png_ptr, row_pointers, NULL); |
| 495 | |
| 496 | iter->SetRow(row_pointers, row_stride); |
| 497 | y++; |
| 498 | } while(iter->PrevRow()); |
| 499 | // printf("Y=%d ",y); |
| 500 | } |
| 501 | |
| 502 | delete iter; |
| 503 | delete[] row_pointers; |
| 504 | |
| 505 | /* read the rest of the file, getting any additional chunks |
| 506 | in info_ptr */ |
| 507 | png_read_end(png_ptr, info_ptr); |
| 508 | |
| 509 | /* clean up after the read, and free any memory allocated */ |
| 510 | png_read_destroy(png_ptr, info_ptr, (png_info *)0); |
| 511 | |
| 512 | /* free the structures */ |
| 513 | delete(png_ptr); |
| 514 | delete(info_ptr); |
| 515 | |
| 516 | /* close the file */ |
| 517 | fclose(fp); |
| 518 | |
| 519 | /* that's it */ |
| 520 | return TRUE; |
| 521 | } |
| 522 | |
| 523 | |
| 524 | /* write a png file */ |
| 525 | |
| 526 | bool wxPNGReader::SaveFile(wxChar * ImageFileName) |
| 527 | { |
| 528 | if (ImageFileName) |
| 529 | wxStrcpy(filename, ImageFileName); |
| 530 | |
| 531 | wxPNGReaderIter iter(this); |
| 532 | FILE *fp; |
| 533 | png_struct *png_ptr; |
| 534 | png_info *info_ptr; |
| 535 | |
| 536 | /* open the file */ |
| 537 | fp = fopen(wxConvFile.cWX2MB(filename), "wb"); |
| 538 | if (!fp) |
| 539 | return FALSE; |
| 540 | |
| 541 | /* allocate the necessary structures */ |
| 542 | png_ptr = new (png_struct); |
| 543 | if (!png_ptr) |
| 544 | { |
| 545 | fclose(fp); |
| 546 | return FALSE; |
| 547 | } |
| 548 | |
| 549 | info_ptr = new (png_info); |
| 550 | if (!info_ptr) |
| 551 | { |
| 552 | fclose(fp); |
| 553 | delete(png_ptr); |
| 554 | return FALSE; |
| 555 | } |
| 556 | |
| 557 | /* set error handling */ |
| 558 | if (setjmp(png_ptr->jmpbuf)) |
| 559 | { |
| 560 | png_write_destroy(png_ptr); |
| 561 | fclose(fp); |
| 562 | delete(png_ptr); |
| 563 | delete(info_ptr); |
| 564 | |
| 565 | /* If we get here, we had a problem reading the file */ |
| 566 | return FALSE; |
| 567 | } |
| 568 | //png_set_error(ima_png_error, NULL); |
| 569 | |
| 570 | // printf("writig pg %s ", filename); |
| 571 | /* initialize the structures */ |
| 572 | png_info_init(info_ptr); |
| 573 | png_write_init(png_ptr); |
| 574 | |
| 575 | int row_stride = GetWidth() * ((GetDepth()+7)>>3); |
| 576 | /* set up the output control */ |
| 577 | png_init_io(png_ptr, fp); |
| 578 | |
| 579 | /* set the file information here */ |
| 580 | info_ptr->width = GetWidth(); |
| 581 | info_ptr->height = GetHeight(); |
| 582 | info_ptr->pixel_depth = GetDepth(); |
| 583 | info_ptr->channels = (GetDepth()>8) ? 3: 1; |
| 584 | info_ptr->bit_depth = GetDepth()/info_ptr->channels; |
| 585 | info_ptr->color_type = GetColorType(); |
| 586 | info_ptr->compression_type = info_ptr->filter_type = info_ptr->interlace_type=0; |
| 587 | info_ptr->valid = 0; |
| 588 | info_ptr->rowbytes = row_stride; |
| 589 | |
| 590 | |
| 591 | // 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); |
| 592 | /* set the palette if there is one */ |
| 593 | if ((GetColorType() & COLORTYPE_PALETTE) && GetPalette()) |
| 594 | { |
| 595 | // printf("writing paleta[%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette()); |
| 596 | info_ptr->valid |= PNG_INFO_PLTE; |
| 597 | info_ptr->palette = new png_color[256]; |
| 598 | info_ptr->num_palette = 256; |
| 599 | for (int i=0; i<256; i++) |
| 600 | GetPalette()->GetRGB(i, &info_ptr->palette[i].red, &info_ptr->palette[i].green, &info_ptr->palette[i].blue); |
| 601 | } |
| 602 | // printf("Paleta [%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette()); |
| 603 | |
| 604 | |
| 605 | /* optional significant bit chunk */ |
| 606 | // info_ptr->valid |= PNG_INFO_sBIT; |
| 607 | // info_ptr->sig_bit = true_bit_depth; |
| 608 | |
| 609 | /* optional gamma chunk */ |
| 610 | // info_ptr->valid |= PNG_INFO_gAMA; |
| 611 | // info_ptr->gamma = gamma; |
| 612 | |
| 613 | /* other optional chunks */ |
| 614 | |
| 615 | /* write the file information */ |
| 616 | png_write_info(png_ptr, info_ptr); |
| 617 | |
| 618 | /* set up the transformations you want. Note that these are |
| 619 | all optional. Only call them if you want them */ |
| 620 | |
| 621 | /* shift the pixels up to a legal bit depth and fill in |
| 622 | as appropriate to correctly scale the image */ |
| 623 | // png_set_shift(png_ptr, &(info_ptr->sig_bit)); |
| 624 | |
| 625 | /* pack pixels into bytes */ |
| 626 | // png_set_packing(png_ptr); |
| 627 | |
| 628 | /* flip bgr pixels to rgb */ |
| 629 | // png_set_bgr(png_ptr); |
| 630 | |
| 631 | /* swap bytes of 16 bit files to most significant bit first */ |
| 632 | // png_set_swap(png_ptr); |
| 633 | |
| 634 | /* get rid of filler bytes, pack rgb into 3 bytes */ |
| 635 | // png_set_rgbx(png_ptr); |
| 636 | |
| 637 | /* If you are only writing one row at a time, this works */ |
| 638 | |
| 639 | byte *row_pointers = new byte[row_stride]; |
| 640 | iter.upset(); |
| 641 | do { |
| 642 | // (unsigned char *)iter.GetRow(); |
| 643 | iter.GetRow(row_pointers, row_stride); |
| 644 | png_write_row(png_ptr, row_pointers); |
| 645 | } while(iter.PrevRow()); |
| 646 | |
| 647 | delete[] row_pointers; |
| 648 | |
| 649 | /* write the rest of the file */ |
| 650 | png_write_end(png_ptr, info_ptr); |
| 651 | |
| 652 | /* clean up after the write, and free any memory allocated */ |
| 653 | png_write_destroy(png_ptr); |
| 654 | |
| 655 | /* if you malloced the palette, free it here */ |
| 656 | if (info_ptr->palette) |
| 657 | delete[] (info_ptr->palette); |
| 658 | |
| 659 | /* free the structures */ |
| 660 | delete(png_ptr); |
| 661 | delete(info_ptr); |
| 662 | |
| 663 | /* close the file */ |
| 664 | fclose(fp); |
| 665 | |
| 666 | /* that's it */ |
| 667 | return TRUE; |
| 668 | } |
| 669 | |
| 670 | static int Power(int x, int y) |
| 671 | { |
| 672 | int z = 1; |
| 673 | int i; |
| 674 | for ( i = 0; i < y; i++) |
| 675 | { |
| 676 | z *= x; |
| 677 | } |
| 678 | return z; |
| 679 | } |
| 680 | |
| 681 | static char hexArray[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', |
| 682 | 'C', 'D', 'E', 'F' }; |
| 683 | |
| 684 | static void DecToHex(int dec, char *buf) |
| 685 | { |
| 686 | int firstDigit = (int)(dec/16.0); |
| 687 | int secondDigit = (int)(dec - (firstDigit*16.0)); |
| 688 | buf[0] = hexArray[firstDigit]; |
| 689 | buf[1] = hexArray[secondDigit]; |
| 690 | buf[2] = 0; |
| 691 | } |
| 692 | |
| 693 | |
| 694 | bool wxPNGReader::SaveXPM(wxChar *filename, wxChar *name) |
| 695 | { |
| 696 | wxChar nameStr[256]; |
| 697 | if ( name ) |
| 698 | wxStrcpy(nameStr, name); |
| 699 | else |
| 700 | { |
| 701 | wxStrcpy(nameStr, filename); |
| 702 | wxStripExtension(nameStr); |
| 703 | } |
| 704 | |
| 705 | if ( GetDepth() > 4 ) |
| 706 | { |
| 707 | // Only a depth of 4 and below allowed |
| 708 | return FALSE; |
| 709 | } |
| 710 | |
| 711 | if ( !GetPalette() ) |
| 712 | return FALSE; |
| 713 | |
| 714 | ofstream str(wxConvFile.cWX2MB(filename)); |
| 715 | if ( str.bad() ) |
| 716 | return FALSE; |
| 717 | |
| 718 | int noColours = Power(2, GetDepth()); |
| 719 | |
| 720 | // Output header |
| 721 | str << "/* XPM */\n"; |
| 722 | str << "static char * " << nameStr << "_xpm[] = {\n"; |
| 723 | str << "\"" << GetWidth() << " " << GetHeight() << " " << noColours << " 1\",\n"; |
| 724 | |
| 725 | // Output colourmap |
| 726 | int base = 97 ; // start from 'a' |
| 727 | |
| 728 | unsigned char red, green, blue; |
| 729 | char hexBuf[4]; |
| 730 | int i; |
| 731 | for ( i = 0; i < noColours; i ++) |
| 732 | { |
| 733 | str << "\"" << (char)(base + i) << " c #"; |
| 734 | GetPalette()->GetRGB(i, &red, &green, &blue); |
| 735 | DecToHex(red, hexBuf); |
| 736 | str << hexBuf; |
| 737 | DecToHex(green, hexBuf); |
| 738 | str << hexBuf; |
| 739 | DecToHex(blue, hexBuf); |
| 740 | str << hexBuf; |
| 741 | str << "\",\n"; |
| 742 | } |
| 743 | |
| 744 | // Output the data |
| 745 | int x, y; |
| 746 | for ( y = 0; y < GetHeight(); y++) |
| 747 | { |
| 748 | str << "\""; |
| 749 | for ( x = 0; x < GetWidth(); x++) |
| 750 | { |
| 751 | int index = GetIndex(x, y); |
| 752 | str << (char)(base + index) ; |
| 753 | } |
| 754 | str << "\",\n"; |
| 755 | } |
| 756 | |
| 757 | str << "};\n"; |
| 758 | str.flush(); |
| 759 | |
| 760 | return TRUE; |
| 761 | } |
| 762 | |
| 763 | #include <wx/os2/pnghand.h> |
| 764 | |
| 765 | IMPLEMENT_DYNAMIC_CLASS(wxPNGFileHandler, wxBitmapHandler) |
| 766 | |
| 767 | bool wxPNGFileHandler::LoadFile(wxBitmap *bitmap, const wxString& name, HPS hPs, long flags, |
| 768 | int desiredWidth, int desiredHeight) |
| 769 | { |
| 770 | wxPNGReader reader; |
| 771 | if (reader.ReadFile(WXSTRINGCAST name)) |
| 772 | { |
| 773 | return reader.InstantiateBitmap(bitmap); |
| 774 | } |
| 775 | else |
| 776 | return FALSE; |
| 777 | } |
| 778 | |
| 779 | bool wxPNGFileHandler::SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *pal) |
| 780 | { |
| 781 | return FALSE; |
| 782 | } |
| 783 | |
| 784 | |