dlls/gphoto2.ds/ds_image.c

   1 /*
   2  * Copyright 2000 Corel Corporation
   3  * Copyright 2006 Marcus Meissner
   4  * Copyright 2006 CodeWeavers, Aric Stewart
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23 #include "wine/library.h"
  24
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "winuser.h"
  32 #include "twain.h"
  33 #include "gphoto2_i.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(twain);
  37
  38 #ifdef HAVE_GPHOTO2
  39 static void *libjpeg_handle;
  40 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  41 MAKE_FUNCPTR(jpeg_std_error);
  42 MAKE_FUNCPTR(jpeg_CreateDecompress);
  43 MAKE_FUNCPTR(jpeg_read_header);
  44 MAKE_FUNCPTR(jpeg_start_decompress);
  45 MAKE_FUNCPTR(jpeg_read_scanlines);
  46 MAKE_FUNCPTR(jpeg_finish_decompress);
  47 MAKE_FUNCPTR(jpeg_destroy_decompress);
  48 #undef MAKE_FUNCPTR
  49
  50 static void *load_libjpeg(void)
  51 {
  52     if((libjpeg_handle = wine_dlopen(SONAME_LIBJPEG, RTLD_NOW, NULL, 0)) != NULL) {
  53
  54 #define LOAD_FUNCPTR(f) \
  55     if((p##f = wine_dlsym(libjpeg_handle, #f, NULL, 0)) == NULL) { \
  56         libjpeg_handle = NULL; \
  57         return NULL; \
  58     }
  59
  60         LOAD_FUNCPTR(jpeg_std_error);
  61         LOAD_FUNCPTR(jpeg_CreateDecompress);
  62         LOAD_FUNCPTR(jpeg_read_header);
  63         LOAD_FUNCPTR(jpeg_start_decompress);
  64         LOAD_FUNCPTR(jpeg_read_scanlines);
  65         LOAD_FUNCPTR(jpeg_finish_decompress);
  66         LOAD_FUNCPTR(jpeg_destroy_decompress);
  67 #undef LOAD_FUNCPTR
  68     }
  69     return libjpeg_handle;
  70 }
  71
  72
  73 /* for the jpeg decompressor source manager. */
  74 static void _jpeg_init_source(j_decompress_ptr cinfo) { }
  75
  76 static boolean _jpeg_fill_input_buffer(j_decompress_ptr cinfo) {
  77     ERR("(), should not get here.\n");
  78     return FALSE;
  79 }
  80
  81 static void _jpeg_skip_input_data(j_decompress_ptr cinfo,long num_bytes) {
  82     TRACE("Skipping %ld bytes...\n", num_bytes);
  83     cinfo->src->next_input_byte += num_bytes;
  84     cinfo->src->bytes_in_buffer -= num_bytes;
  85 }
  86
  87 static boolean _jpeg_resync_to_restart(j_decompress_ptr cinfo, int desired) {
  88     ERR("(desired=%d), should not get here.\n",desired);
  89     return FALSE;
  90 }
  91 static void _jpeg_term_source(j_decompress_ptr cinfo) { }
  92 #endif
  93
  94 /* DG_IMAGE/DAT_CIECOLOR/MSG_GET */
  95 TW_UINT16 GPHOTO2_CIEColorGet (pTW_IDENTITY pOrigin,
  96                              TW_MEMREF pData)
  97 {
  98     FIXME ("stub!\n");
  99
 100     return TWRC_FAILURE;
 101 }
 102
 103 /* DG_IMAGE/DAT_EXTIMAGEINFO/MSG_GET */
 104 TW_UINT16 GPHOTO2_ExtImageInfoGet (pTW_IDENTITY pOrigin,
 105                                  TW_MEMREF pData)
 106 {
 107     FIXME ("stub!\n");
 108
 109     return TWRC_FAILURE;
 110 }
 111
 112 /* DG_IMAGE/DAT_GRAYRESPONSE/MSG_RESET */
 113 TW_UINT16 GPHOTO2_GrayResponseReset (pTW_IDENTITY pOrigin,
 114                                    TW_MEMREF pData)
 115 {
 116     FIXME ("stub!\n");
 117
 118     return TWRC_FAILURE;
 119 }
 120
 121 /* DG_IMAGE/DAT_GRAYRESPONSE/MSG_SET */
 122 TW_UINT16 GPHOTO2_GrayResponseSet (pTW_IDENTITY pOrigin,
 123                                  TW_MEMREF pData)
 124 {
 125     FIXME ("stub!\n");
 126
 127     return TWRC_FAILURE;
 128 }
 129
 130 /* DG_IMAGE/DAT_IMAGEFILEXFER/MSG_GET */
 131 TW_UINT16 GPHOTO2_ImageFileXferGet (pTW_IDENTITY pOrigin,
 132                                   TW_MEMREF pData)
 133 {
 134     FIXME ("stub!\n");
 135
 136     return TWRC_FAILURE;
 137 }
 138
 139 #ifdef HAVE_GPHOTO2
 140 static TW_UINT16 _get_image_and_startup_jpeg() {
 141     const char *folder = NULL, *filename = NULL;
 142     struct gphoto2_file *file;
 143     const unsigned char *filedata;
 144     unsigned long filesize;
 145     int ret;
 146
 147     if (activeDS.file) /* Already loaded. */
 148         return TWRC_SUCCESS;
 149
 150     if(!libjpeg_handle) {
 151         if(!load_libjpeg()) {
 152             FIXME("Failed reading JPEG because unable to find %s\n", SONAME_LIBJPEG);
 153             filedata = NULL;
 154             return TWRC_FAILURE;
 155         }
 156     }
 157
 158     LIST_FOR_EACH_ENTRY( file, &activeDS.files, struct gphoto2_file, entry ) {
 159         if (strstr(file->filename,".JPG") || strstr(file->filename,".jpg")) {
 160             filename = file->filename;
 161             folder = file->folder;
 162             TRACE("downloading %s/%s\n", folder, filename);
 163             if (file->download) {
 164                 file->download = FALSE; /* mark as done */
 165                 break;
 166             }
 167         }
 168     }
 169     gp_file_new (&activeDS.file);
 170     ret = gp_camera_file_get(activeDS.camera, folder, filename, GP_FILE_TYPE_NORMAL,
 171                              activeDS.file, activeDS.context);
 172     if (ret < GP_OK) {
 173         FIXME("Failed to get file?\n");
 174         activeDS.twCC = TWCC_SEQERROR;
 175         return TWRC_FAILURE;
 176     }
 177     ret = gp_file_get_data_and_size (activeDS.file, (const char**)&filedata, &filesize);
 178     if (ret < GP_OK) {
 179         FIXME("Failed to get file data?\n");
 180         activeDS.twCC = TWCC_SEQERROR;
 181         return TWRC_FAILURE;
 182     }
 183
 184     /* This is basically so we can use in-memory data for jpeg decompression.
 185      * We need to have all the functions.
 186      */
 187     activeDS.xjsm.next_input_byte       = filedata;
 188     activeDS.xjsm.bytes_in_buffer       = filesize;
 189     activeDS.xjsm.init_source   = _jpeg_init_source;
 190     activeDS.xjsm.fill_input_buffer     = _jpeg_fill_input_buffer;
 191     activeDS.xjsm.skip_input_data       = _jpeg_skip_input_data;
 192     activeDS.xjsm.resync_to_restart     = _jpeg_resync_to_restart;
 193     activeDS.xjsm.term_source   = _jpeg_term_source;
 194
 195     activeDS.jd.err = pjpeg_std_error(&activeDS.jerr);
 196     /* jpeg_create_decompress is a macro that expands to jpeg_CreateDecompress - see jpeglib.h
 197      * jpeg_create_decompress(&jd); */
 198     pjpeg_CreateDecompress(&activeDS.jd, JPEG_LIB_VERSION, (size_t) sizeof(struct jpeg_decompress_struct));
 199     activeDS.jd.src = &activeDS.xjsm;
 200     ret=pjpeg_read_header(&activeDS.jd,TRUE);
 201     activeDS.jd.out_color_space = JCS_RGB;
 202     pjpeg_start_decompress(&activeDS.jd);
 203     if (ret != JPEG_HEADER_OK) {
 204         ERR("Jpeg image in stream has bad format, read header returned %d.\n",ret);
 205         gp_file_unref (activeDS.file);
 206         activeDS.file = NULL;
 207         return TWRC_FAILURE;
 208     }
 209     return TWRC_SUCCESS;
 210 }
 211 #endif
 212
 213 /* DG_IMAGE/DAT_IMAGEINFO/MSG_GET */
 214 TW_UINT16 GPHOTO2_ImageInfoGet (pTW_IDENTITY pOrigin,
 215                               TW_MEMREF pData)
 216 {
 217 #ifdef HAVE_GPHOTO2
 218     pTW_IMAGEINFO pImageInfo = (pTW_IMAGEINFO) pData;
 219
 220     TRACE("DG_IMAGE/DAT_IMAGEINFO/MSG_GET\n");
 221
 222     if (activeDS.currentState != 6 && activeDS.currentState != 7) {
 223         activeDS.twCC = TWCC_SEQERROR;
 224         return TWRC_FAILURE;
 225     }
 226     if (TWRC_SUCCESS != _get_image_and_startup_jpeg()) {
 227         FIXME("Failed to get an image\n");
 228         activeDS.twCC = TWCC_SEQERROR;
 229         return TWRC_FAILURE;
 230     }
 231     if (activeDS.currentState == 6)
 232     {
 233         /* return general image description information about the image about to be transferred */
 234         TRACE("Getting parameters\n");
 235     }
 236     TRACE("activeDS.jd.output_width = %d\n", activeDS.jd.output_width);
 237     TRACE("activeDS.jd.output_height = %d\n", activeDS.jd.output_height);
 238     pImageInfo->Compression     = TWCP_NONE;
 239     pImageInfo->SamplesPerPixel = 3;
 240     pImageInfo->BitsPerSample[0]= 8;
 241     pImageInfo->BitsPerSample[1]= 8;
 242     pImageInfo->BitsPerSample[2]= 8;
 243     pImageInfo->PixelType       = TWPT_RGB;
 244     pImageInfo->Planar          = FALSE; /* R-G-B is chunky! */
 245     pImageInfo->XResolution.Whole = -1;
 246     pImageInfo->XResolution.Frac = 0;
 247     pImageInfo->YResolution.Whole = -1;
 248     pImageInfo->YResolution.Frac = 0;
 249     pImageInfo->ImageWidth      = activeDS.jd.output_width;
 250     pImageInfo->ImageLength     = activeDS.jd.output_height;
 251     pImageInfo->BitsPerPixel    = 24;
 252     return TWRC_SUCCESS;
 253 #else
 254     return TWRC_FAILURE;
 255 #endif
 256 }
 257
 258 /* DG_IMAGE/DAT_IMAGELAYOUT/MSG_GET */
 259 TW_UINT16 GPHOTO2_ImageLayoutGet (pTW_IDENTITY pOrigin,
 260                                 TW_MEMREF pData)
 261 {
 262     FIXME ("stub!\n");
 263
 264     return TWRC_FAILURE;
 265 }
 266
 267 /* DG_IMAGE/DAT_IMAGELAYOUT/MSG_GETDEFAULT */
 268 TW_UINT16 GPHOTO2_ImageLayoutGetDefault (pTW_IDENTITY pOrigin,
 269                                        TW_MEMREF pData)
 270 {
 271     FIXME ("stub!\n");
 272
 273     return TWRC_FAILURE;
 274 }
 275
 276 /* DG_IMAGE/DAT_IMAGELAYOUT/MSG_RESET */
 277 TW_UINT16 GPHOTO2_ImageLayoutReset (pTW_IDENTITY pOrigin,
 278                                   TW_MEMREF pData)
 279 {
 280     FIXME ("stub!\n");
 281
 282     return TWRC_FAILURE;
 283 }
 284
 285 /* DG_IMAGE/DAT_IMAGELAYOUT/MSG_SET */
 286 TW_UINT16 GPHOTO2_ImageLayoutSet (pTW_IDENTITY pOrigin,
 287                                 TW_MEMREF pData)
 288 {
 289     FIXME ("stub!\n");
 290
 291     return TWRC_FAILURE;
 292 }
 293
 294 /* DG_IMAGE/DAT_IMAGEMEMXFER/MSG_GET */
 295 TW_UINT16 GPHOTO2_ImageMemXferGet (pTW_IDENTITY pOrigin,
 296                                  TW_MEMREF pData)
 297 {
 298 #ifdef HAVE_GPHOTO2
 299     TW_UINT16 twRC = TWRC_SUCCESS;
 300     pTW_IMAGEMEMXFER pImageMemXfer = (pTW_IMAGEMEMXFER) pData;
 301     LPBYTE buffer;
 302     int readrows;
 303     unsigned int curoff;
 304
 305     TRACE ("DG_IMAGE/DAT_IMAGEMEMXFER/MSG_GET\n");
 306     if (activeDS.currentState < 6 || activeDS.currentState > 7) {
 307         activeDS.twCC = TWCC_SEQERROR;
 308         return TWRC_FAILURE;
 309     }
 310     TRACE("pImageMemXfer.Compression is %d\n", pImageMemXfer->Compression);
 311     if (activeDS.currentState == 6) {
 312         if (TWRC_SUCCESS != _get_image_and_startup_jpeg()) {
 313             FIXME("Failed to get an image\n");
 314             activeDS.twCC = TWCC_SEQERROR;
 315             return TWRC_FAILURE;
 316         }
 317
 318     if (!activeDS.progressWnd)
 319         activeDS.progressWnd = TransferringDialogBox(NULL,0);
 320     TransferringDialogBox(activeDS.progressWnd,0);
 321
 322         activeDS.currentState = 7;
 323     } else {
 324         if (!activeDS.file) {
 325             activeDS.twCC = TWRC_SUCCESS;
 326             return TWRC_XFERDONE;
 327         }
 328     }
 329
 330     if (pImageMemXfer->Memory.Flags & TWMF_HANDLE) {
 331         FIXME("Memory Handle, may not be locked correctly\n");
 332         buffer = LocalLock(pImageMemXfer->Memory.TheMem);
 333     } else
 334         buffer = pImageMemXfer->Memory.TheMem;
 335
 336     memset(buffer,0,pImageMemXfer->Memory.Length);
 337     curoff = 0; readrows = 0;
 338     pImageMemXfer->YOffset      = activeDS.jd.output_scanline;
 339     pImageMemXfer->XOffset      = 0;    /* we do whole strips */
 340     while ((activeDS.jd.output_scanline<activeDS.jd.output_height) &&
 341            ((pImageMemXfer->Memory.Length - curoff) > activeDS.jd.output_width*activeDS.jd.output_components)
 342     ) {
 343         JSAMPROW row = buffer+curoff;
 344         int x = pjpeg_read_scanlines(&activeDS.jd,&row,1);
 345         if (x != 1) {
 346                 FIXME("failed to read current scanline?\n");
 347                 break;
 348         }
 349         readrows++;
 350         curoff += activeDS.jd.output_width*activeDS.jd.output_components;
 351     }
 352     pImageMemXfer->Compression  = TWCP_NONE;
 353     pImageMemXfer->BytesPerRow  = activeDS.jd.output_components * activeDS.jd.output_width;
 354     pImageMemXfer->Rows         = readrows;
 355     pImageMemXfer->Columns      = activeDS.jd.output_width; /* we do whole strips */
 356     pImageMemXfer->BytesWritten = curoff;
 357
 358     TransferringDialogBox(activeDS.progressWnd,0);
 359
 360     if (activeDS.jd.output_scanline == activeDS.jd.output_height) {
 361         pjpeg_finish_decompress(&activeDS.jd);
 362         pjpeg_destroy_decompress(&activeDS.jd);
 363         gp_file_unref (activeDS.file);
 364         activeDS.file = NULL;
 365         TRACE("xfer is done!\n");
 366
 367         /*TransferringDialogBox(activeDS.progressWnd, -1);*/
 368         twRC = TWRC_XFERDONE;
 369     }
 370     activeDS.twCC = TWRC_SUCCESS;
 371     if (pImageMemXfer->Memory.Flags & TWMF_HANDLE)
 372         LocalUnlock(pImageMemXfer->Memory.TheMem);
 373     return twRC;
 374 #else
 375     return TWRC_FAILURE;
 376 #endif
 377 }
 378
 379 /* DG_IMAGE/DAT_IMAGENATIVEXFER/MSG_GET */
 380 TW_UINT16 GPHOTO2_ImageNativeXferGet (pTW_IDENTITY pOrigin,
 381                                     TW_MEMREF pData)
 382 {
 383 #ifdef HAVE_GPHOTO2
 384     pTW_UINT32 pHandle = (pTW_UINT32) pData;
 385     HBITMAP hDIB;
 386     BITMAPINFO bmpInfo;
 387     LPBYTE bits, oldbits;
 388     JSAMPROW samprow, oldsamprow;
 389     HDC dc;
 390
 391     FIXME("DG_IMAGE/DAT_IMAGENATIVEXFER/MSG_GET: implemented, but expect program crash due to DIB.\n");
 392
 393 /*  NOTE NOTE NOTE NOTE NOTE NOTE NOTE
 394  *
 395  *  While this is a mandatory transfer mode and this function
 396  *  is correctly implemented and fully works, the calling program
 397  *  will likely crash after calling.
 398  *
 399  *  Reason is that there is a lot of example code that does:
 400  *  bmpinfo = (LPBITMAPINFOHEADER)GlobalLock(hBITMAP); ... pointer access to bmpinfo
 401  *
 402  *  Our current HBITMAP handles do not support getting GlobalLocked -> App Crash
 403  *
 404  *  This needs a GDI Handle rewrite, at least for DIB sections.
 405  *  - Marcus
 406  */
 407     if (activeDS.currentState != 6) {
 408         activeDS.twCC = TWCC_SEQERROR;
 409         return TWRC_FAILURE;
 410     }
 411     if (TWRC_SUCCESS != _get_image_and_startup_jpeg()) {
 412         FIXME("Failed to get an image\n");
 413         activeDS.twCC = TWCC_OPERATIONERROR;
 414         return TWRC_FAILURE;
 415     }
 416     TRACE("Acquiring image %dx%dx%d bits from gphoto.\n",
 417         activeDS.jd.output_width, activeDS.jd.output_height,
 418         activeDS.jd.output_components*8);
 419     ZeroMemory (&bmpInfo, sizeof (BITMAPINFO));
 420     bmpInfo.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
 421     bmpInfo.bmiHeader.biWidth = activeDS.jd.output_width;
 422     bmpInfo.bmiHeader.biHeight = -activeDS.jd.output_height;
 423     bmpInfo.bmiHeader.biPlanes = 1;
 424     bmpInfo.bmiHeader.biBitCount = activeDS.jd.output_components*8;
 425     bmpInfo.bmiHeader.biCompression = BI_RGB;
 426     bmpInfo.bmiHeader.biSizeImage = 0;
 427     bmpInfo.bmiHeader.biXPelsPerMeter = 0;
 428     bmpInfo.bmiHeader.biYPelsPerMeter = 0;
 429     bmpInfo.bmiHeader.biClrUsed = 0;
 430     bmpInfo.bmiHeader.biClrImportant = 0;
 431     hDIB = CreateDIBSection ((dc = GetDC(activeDS.hwndOwner)), &bmpInfo,
 432                              DIB_RGB_COLORS, (LPVOID)&bits, 0, 0);
 433     if (!hDIB) {
 434         FIXME("Failed creating DIB.\n");
 435         gp_file_unref (activeDS.file);
 436         activeDS.file = NULL;
 437         activeDS.twCC = TWCC_LOWMEMORY;
 438         return TWRC_FAILURE;
 439     }
 440     samprow = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,activeDS.jd.output_width*activeDS.jd.output_components);
 441     oldbits = bits;
 442     oldsamprow = samprow;
 443     while ( activeDS.jd.output_scanline<activeDS.jd.output_height ) {
 444         int i, x = pjpeg_read_scanlines(&activeDS.jd,&samprow,1);
 445         if (x != 1) {
 446                 FIXME("failed to read current scanline?\n");
 447                 break;
 448         }
 449         /* We have to convert from RGB to BGR, see MSDN/ BITMAPINFOHEADER */
 450         for(i=0;i<activeDS.jd.output_width;i++,samprow+=activeDS.jd.output_components) {
 451             *(bits++) = *(samprow+2);
 452             *(bits++) = *(samprow+1);
 453             *(bits++) = *(samprow);
 454         }
 455         bits = (LPBYTE)(((UINT_PTR)bits + 3) & ~3);
 456         samprow = oldsamprow;
 457     }
 458     bits = oldbits;
 459     HeapFree (GetProcessHeap(), 0, samprow);
 460     gp_file_unref (activeDS.file);
 461     activeDS.file = NULL;
 462     ReleaseDC (activeDS.hwndOwner, dc);
 463     *pHandle = (TW_UINT32)hDIB;
 464     activeDS.twCC = TWCC_SUCCESS;
 465     activeDS.currentState = 7;
 466     return TWRC_XFERDONE;
 467 #else
 468     return TWRC_FAILURE;
 469 #endif
 470 }
 471
 472 /* DG_IMAGE/DAT_JPEGCOMPRESSION/MSG_GET */
 473 TW_UINT16 GPHOTO2_JPEGCompressionGet (pTW_IDENTITY pOrigin,
 474                                     TW_MEMREF pData)
 475 {
 476     FIXME ("stub!\n");
 477
 478     return TWRC_FAILURE;
 479 }
 480
 481 /* DG_IMAGE/DAT_JPEGCOMPRESSION/MSG_GETDEFAULT */
 482 TW_UINT16 GPHOTO2_JPEGCompressionGetDefault (pTW_IDENTITY pOrigin,
 483
 484                                            TW_MEMREF pData)
 485 {
 486     FIXME ("stub!\n");
 487
 488     return TWRC_FAILURE;
 489 }
 490
 491 /* DG_IMAGE/DAT_JPEGCOMPRESSION/MSG_RESET */
 492 TW_UINT16 GPHOTO2_JPEGCompressionReset (pTW_IDENTITY pOrigin,
 493                                       TW_MEMREF pData)
 494 {
 495     FIXME ("stub!\n");
 496
 497     return TWRC_FAILURE;
 498 }
 499
 500 /* DG_IMAGE/DAT_JPEGCOMPRESSION/MSG_SET */
 501 TW_UINT16 GPHOTO2_JPEGCompressionSet (pTW_IDENTITY pOrigin,
 502                                     TW_MEMREF pData)
 503 {
 504     FIXME ("stub!\n");
 505
 506     return TWRC_FAILURE;
 507 }
 508
 509 /* DG_IMAGE/DAT_PALETTE8/MSG_GET */
 510 TW_UINT16 GPHOTO2_Palette8Get (pTW_IDENTITY pOrigin,
 511                              TW_MEMREF pData)
 512 {
 513     FIXME ("stub!\n");
 514
 515     return TWRC_FAILURE;
 516 }
 517
 518 /* DG_IMAGE/DAT_PALETTE8/MSG_GETDEFAULT */
 519 TW_UINT16 GPHOTO2_Palette8GetDefault (pTW_IDENTITY pOrigin,
 520                                     TW_MEMREF pData)
 521 {
 522     FIXME ("stub!\n");
 523
 524     return TWRC_FAILURE;
 525 }
 526
 527 /* DG_IMAGE/DAT_PALETTE8/MSG_RESET */
 528 TW_UINT16 GPHOTO2_Palette8Reset (pTW_IDENTITY pOrigin,
 529                                TW_MEMREF pData)
 530 {
 531     FIXME ("stub!\n");
 532
 533     return TWRC_FAILURE;
 534 }
 535
 536 /* DG_IMAGE/DAT_PALETTE8/MSG_SET */
 537 TW_UINT16 GPHOTO2_Palette8Set (pTW_IDENTITY pOrigin,
 538                              TW_MEMREF pData)
 539 {
 540     FIXME ("stub!\n");
 541
 542     return TWRC_FAILURE;
 543 }
 544
 545 /* DG_IMAGE/DAT_RGBRESPONSE/MSG_RESET */
 546 TW_UINT16 GPHOTO2_RGBResponseReset (pTW_IDENTITY pOrigin,
 547                                   TW_MEMREF pData)
 548 {
 549     FIXME ("stub!\n");
 550
 551     return TWRC_FAILURE;
 552 }
 553
 554 /* DG_IMAGE/DAT_RGBRESPONSE/MSG_SET */
 555 TW_UINT16 GPHOTO2_RGBResponseSet (pTW_IDENTITY pOrigin,
 556                                 TW_MEMREF pData)
 557 {
 558     FIXME ("stub!\n");
 559
 560     return TWRC_FAILURE;
 561 }
 562
 563 #ifdef HAVE_GPHOTO2
 564 TW_UINT16
 565 _get_gphoto2_file_as_DIB(
 566     const char *folder, const char *filename, CameraFileType type,
 567     HWND hwnd, HBITMAP *hDIB
 568 ) {
 569     const unsigned char *filedata;
 570     unsigned long       filesize;
 571     int                 ret;
 572     CameraFile          *file;
 573     struct jpeg_source_mgr              xjsm;
 574     struct jpeg_decompress_struct       jd;
 575     struct jpeg_error_mgr               jerr;
 576     HDC                 dc;
 577     BITMAPINFO          bmpInfo;
 578     LPBYTE              bits, oldbits;
 579     JSAMPROW            samprow, oldsamprow;
 580
 581     if(!libjpeg_handle) {
 582         if(!load_libjpeg()) {
 583             FIXME("Failed reading JPEG because unable to find %s\n", SONAME_LIBJPEG);
 584             filedata = NULL;
 585             return TWRC_FAILURE;
 586         }
 587     }
 588
 589     gp_file_new (&file);
 590     ret = gp_camera_file_get(activeDS.camera, folder, filename, type, file, activeDS.context);
 591     if (ret < GP_OK) {
 592         FIXME("Failed to get file?\n");
 593         gp_file_unref (file);
 594         return TWRC_FAILURE;
 595     }
 596     ret = gp_file_get_data_and_size (file, (const char**)&filedata, &filesize);
 597     if (ret < GP_OK) {
 598         FIXME("Failed to get file data?\n");
 599         return TWRC_FAILURE;
 600     }
 601
 602     /* FIXME: Actually we might get other types than JPEG ... But only handle JPEG for now */
 603     if (filedata[0] != 0xff) {
 604         ERR("File %s/%s might not be JPEG, cannot decode!\n", folder, filename);
 605     }
 606
 607     /* This is basically so we can use in-memory data for jpeg decompression.
 608      * We need to have all the functions.
 609      */
 610     xjsm.next_input_byte        = filedata;
 611     xjsm.bytes_in_buffer        = filesize;
 612     xjsm.init_source    = _jpeg_init_source;
 613     xjsm.fill_input_buffer      = _jpeg_fill_input_buffer;
 614     xjsm.skip_input_data        = _jpeg_skip_input_data;
 615     xjsm.resync_to_restart      = _jpeg_resync_to_restart;
 616     xjsm.term_source    = _jpeg_term_source;
 617
 618     jd.err = pjpeg_std_error(&jerr);
 619     /* jpeg_create_decompress is a macro that expands to jpeg_CreateDecompress - see jpeglib.h
 620      * jpeg_create_decompress(&jd); */
 621     pjpeg_CreateDecompress(&jd, JPEG_LIB_VERSION, (size_t) sizeof(struct jpeg_decompress_struct));
 622     jd.src = &xjsm;
 623     ret=pjpeg_read_header(&jd,TRUE);
 624     jd.out_color_space = JCS_RGB;
 625     pjpeg_start_decompress(&jd);
 626     if (ret != JPEG_HEADER_OK) {
 627         ERR("Jpeg image in stream has bad format, read header returned %d.\n",ret);
 628         gp_file_unref (file);
 629         return TWRC_FAILURE;
 630     }
 631
 632     ZeroMemory (&bmpInfo, sizeof (BITMAPINFO));
 633     bmpInfo.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
 634     bmpInfo.bmiHeader.biWidth = jd.output_width;
 635     bmpInfo.bmiHeader.biHeight = -jd.output_height;
 636     bmpInfo.bmiHeader.biPlanes = 1;
 637     bmpInfo.bmiHeader.biBitCount = jd.output_components*8;
 638     bmpInfo.bmiHeader.biCompression = BI_RGB;
 639     bmpInfo.bmiHeader.biSizeImage = 0;
 640     bmpInfo.bmiHeader.biXPelsPerMeter = 0;
 641     bmpInfo.bmiHeader.biYPelsPerMeter = 0;
 642     bmpInfo.bmiHeader.biClrUsed = 0;
 643     bmpInfo.bmiHeader.biClrImportant = 0;
 644     *hDIB = CreateDIBSection ((dc = GetDC(hwnd)), &bmpInfo, DIB_RGB_COLORS, (LPVOID)&bits, 0, 0);
 645     if (!*hDIB) {
 646         FIXME("Failed creating DIB.\n");
 647         gp_file_unref (file);
 648         return TWRC_FAILURE;
 649     }
 650     samprow = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,jd.output_width*jd.output_components);
 651     oldbits = bits;
 652     oldsamprow = samprow;
 653     while ( jd.output_scanline<jd.output_height ) {
 654         int i, x = pjpeg_read_scanlines(&jd,&samprow,1);
 655         if (x != 1) {
 656             FIXME("failed to read current scanline?\n");
 657             break;
 658         }
 659         /* We have to convert from RGB to BGR, see MSDN/ BITMAPINFOHEADER */
 660         for(i=0;i<jd.output_width;i++,samprow+=jd.output_components) {
 661             *(bits++) = *(samprow+2);
 662             *(bits++) = *(samprow+1);
 663             *(bits++) = *(samprow);
 664         }
 665         bits = (LPBYTE)(((UINT_PTR)bits + 3) & ~3);
 666         samprow = oldsamprow;
 667     }
 668     if (hwnd) ReleaseDC (hwnd, dc);
 669     HeapFree (GetProcessHeap(), 0, samprow);
 670     gp_file_unref (file);
 671     return TWRC_SUCCESS;
 672 }
 673 #endif