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