ds_image.c 20 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
/*
 * Copyright 2000 Corel Corporation
 * Copyright 2006 Marcus Meissner
 * Copyright 2006 CodeWeavers, Aric Stewart
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * 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 22 23 24 25 26
 */

#include "config.h"
#include "wine/port.h"

#include <stdarg.h>
#include <stdio.h>

27
#include "gphoto2_i.h"
28 29
#include "wingdi.h"
#include "winuser.h"
30
#include "wine/library.h"
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(twain);

#ifdef HAVE_GPHOTO2
static void *libjpeg_handle;
#define MAKE_FUNCPTR(f) static typeof(f) * p##f
MAKE_FUNCPTR(jpeg_std_error);
MAKE_FUNCPTR(jpeg_CreateDecompress);
MAKE_FUNCPTR(jpeg_read_header);
MAKE_FUNCPTR(jpeg_start_decompress);
MAKE_FUNCPTR(jpeg_read_scanlines);
MAKE_FUNCPTR(jpeg_finish_decompress);
MAKE_FUNCPTR(jpeg_destroy_decompress);
#undef MAKE_FUNCPTR

static void *load_libjpeg(void)
{
    if((libjpeg_handle = wine_dlopen(SONAME_LIBJPEG, RTLD_NOW, NULL, 0)) != NULL) {

#define LOAD_FUNCPTR(f) \
    if((p##f = wine_dlsym(libjpeg_handle, #f, NULL, 0)) == NULL) { \
        libjpeg_handle = NULL; \
        return NULL; \
    }

        LOAD_FUNCPTR(jpeg_std_error);
        LOAD_FUNCPTR(jpeg_CreateDecompress);
        LOAD_FUNCPTR(jpeg_read_header);
        LOAD_FUNCPTR(jpeg_start_decompress);
        LOAD_FUNCPTR(jpeg_read_scanlines);
        LOAD_FUNCPTR(jpeg_finish_decompress);
        LOAD_FUNCPTR(jpeg_destroy_decompress);
#undef LOAD_FUNCPTR
    }
    return libjpeg_handle;
}


/* for the jpeg decompressor source manager. */
static void _jpeg_init_source(j_decompress_ptr cinfo) { }

static boolean _jpeg_fill_input_buffer(j_decompress_ptr cinfo) {
    ERR("(), should not get here.\n");
    return FALSE;
}

static void _jpeg_skip_input_data(j_decompress_ptr cinfo,long num_bytes) {
    TRACE("Skipping %ld bytes...\n", num_bytes);
    cinfo->src->next_input_byte += num_bytes;
    cinfo->src->bytes_in_buffer -= num_bytes;
}

static boolean _jpeg_resync_to_restart(j_decompress_ptr cinfo, int desired) {
    ERR("(desired=%d), should not get here.\n",desired);
    return FALSE;
}
static void _jpeg_term_source(j_decompress_ptr cinfo) { }
#endif

/* DG_IMAGE/DAT_CIECOLOR/MSG_GET */
TW_UINT16 GPHOTO2_CIEColorGet (pTW_IDENTITY pOrigin, 
                             TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_EXTIMAGEINFO/MSG_GET */
TW_UINT16 GPHOTO2_ExtImageInfoGet (pTW_IDENTITY pOrigin, 
                                 TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_GRAYRESPONSE/MSG_RESET */
TW_UINT16 GPHOTO2_GrayResponseReset (pTW_IDENTITY pOrigin, 
                                   TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_GRAYRESPONSE/MSG_SET */
TW_UINT16 GPHOTO2_GrayResponseSet (pTW_IDENTITY pOrigin, 
                                 TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_IMAGEFILEXFER/MSG_GET */
TW_UINT16 GPHOTO2_ImageFileXferGet (pTW_IDENTITY pOrigin, 
                                  TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

#ifdef HAVE_GPHOTO2
137
static TW_UINT16 _get_image_and_startup_jpeg(void) {
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315
    const char *folder = NULL, *filename = NULL;
    struct gphoto2_file *file;
    const unsigned char *filedata;
    unsigned long filesize;
    int ret;

    if (activeDS.file) /* Already loaded. */
	return TWRC_SUCCESS;

    if(!libjpeg_handle) {
	if(!load_libjpeg()) {
	    FIXME("Failed reading JPEG because unable to find %s\n", SONAME_LIBJPEG);
	    filedata = NULL;
	    return TWRC_FAILURE;
	}
    }

    LIST_FOR_EACH_ENTRY( file, &activeDS.files, struct gphoto2_file, entry ) {
	if (strstr(file->filename,".JPG") || strstr(file->filename,".jpg")) {
	    filename = file->filename;
	    folder = file->folder;
	    TRACE("downloading %s/%s\n", folder, filename);
	    if (file->download) {
		file->download = FALSE; /* mark as done */
		break;
	    }
	}
    }
    gp_file_new (&activeDS.file);
    ret = gp_camera_file_get(activeDS.camera, folder, filename, GP_FILE_TYPE_NORMAL,
			     activeDS.file, activeDS.context);
    if (ret < GP_OK) {
	FIXME("Failed to get file?\n");
	activeDS.twCC = TWCC_SEQERROR;
	return TWRC_FAILURE;
    }
    ret = gp_file_get_data_and_size (activeDS.file, (const char**)&filedata, &filesize);
    if (ret < GP_OK) {
	FIXME("Failed to get file data?\n");
	activeDS.twCC = TWCC_SEQERROR;
	return TWRC_FAILURE;
    }

    /* This is basically so we can use in-memory data for jpeg decompression.
     * We need to have all the functions.
     */
    activeDS.xjsm.next_input_byte	= filedata;
    activeDS.xjsm.bytes_in_buffer	= filesize;
    activeDS.xjsm.init_source	= _jpeg_init_source;
    activeDS.xjsm.fill_input_buffer	= _jpeg_fill_input_buffer;
    activeDS.xjsm.skip_input_data	= _jpeg_skip_input_data;
    activeDS.xjsm.resync_to_restart	= _jpeg_resync_to_restart;
    activeDS.xjsm.term_source	= _jpeg_term_source;

    activeDS.jd.err = pjpeg_std_error(&activeDS.jerr);
    /* jpeg_create_decompress is a macro that expands to jpeg_CreateDecompress - see jpeglib.h
     * jpeg_create_decompress(&jd); */
    pjpeg_CreateDecompress(&activeDS.jd, JPEG_LIB_VERSION, (size_t) sizeof(struct jpeg_decompress_struct));
    activeDS.jd.src = &activeDS.xjsm;
    ret=pjpeg_read_header(&activeDS.jd,TRUE);
    activeDS.jd.out_color_space = JCS_RGB;
    pjpeg_start_decompress(&activeDS.jd);
    if (ret != JPEG_HEADER_OK) {
	ERR("Jpeg image in stream has bad format, read header returned %d.\n",ret);
	gp_file_unref (activeDS.file);
	activeDS.file = NULL;
	return TWRC_FAILURE;
    }
    return TWRC_SUCCESS;
}
#endif

/* DG_IMAGE/DAT_IMAGEINFO/MSG_GET */
TW_UINT16 GPHOTO2_ImageInfoGet (pTW_IDENTITY pOrigin, 
                              TW_MEMREF pData)
{
#ifdef HAVE_GPHOTO2
    pTW_IMAGEINFO pImageInfo = (pTW_IMAGEINFO) pData;

    TRACE("DG_IMAGE/DAT_IMAGEINFO/MSG_GET\n");

    if (activeDS.currentState != 6 && activeDS.currentState != 7) {
        activeDS.twCC = TWCC_SEQERROR;
        return TWRC_FAILURE;
    }
    if (TWRC_SUCCESS != _get_image_and_startup_jpeg()) {
	FIXME("Failed to get an image\n");
        activeDS.twCC = TWCC_SEQERROR;
	return TWRC_FAILURE;
    }
    if (activeDS.currentState == 6)
    {
        /* return general image description information about the image about to be transferred */
        TRACE("Getting parameters\n");
    }
    TRACE("activeDS.jd.output_width = %d\n", activeDS.jd.output_width);
    TRACE("activeDS.jd.output_height = %d\n", activeDS.jd.output_height);
    pImageInfo->Compression	= TWCP_NONE;
    pImageInfo->SamplesPerPixel	= 3;
    pImageInfo->BitsPerSample[0]= 8;
    pImageInfo->BitsPerSample[1]= 8;
    pImageInfo->BitsPerSample[2]= 8;
    pImageInfo->PixelType 	= TWPT_RGB;
    pImageInfo->Planar		= FALSE; /* R-G-B is chunky! */
    pImageInfo->XResolution.Whole = -1;
    pImageInfo->XResolution.Frac = 0;
    pImageInfo->YResolution.Whole = -1;
    pImageInfo->YResolution.Frac = 0;
    pImageInfo->ImageWidth 	= activeDS.jd.output_width;
    pImageInfo->ImageLength 	= activeDS.jd.output_height;
    pImageInfo->BitsPerPixel	= 24;
    return TWRC_SUCCESS;
#else
    return TWRC_FAILURE;
#endif
}

/* DG_IMAGE/DAT_IMAGELAYOUT/MSG_GET */
TW_UINT16 GPHOTO2_ImageLayoutGet (pTW_IDENTITY pOrigin, 
                                TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_IMAGELAYOUT/MSG_GETDEFAULT */
TW_UINT16 GPHOTO2_ImageLayoutGetDefault (pTW_IDENTITY pOrigin, 
                                       TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_IMAGELAYOUT/MSG_RESET */
TW_UINT16 GPHOTO2_ImageLayoutReset (pTW_IDENTITY pOrigin, 
                                  TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_IMAGELAYOUT/MSG_SET */
TW_UINT16 GPHOTO2_ImageLayoutSet (pTW_IDENTITY pOrigin, 
                                TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_IMAGEMEMXFER/MSG_GET */
TW_UINT16 GPHOTO2_ImageMemXferGet (pTW_IDENTITY pOrigin, 
                                 TW_MEMREF pData)
{
#ifdef HAVE_GPHOTO2
    TW_UINT16 twRC = TWRC_SUCCESS;
    pTW_IMAGEMEMXFER pImageMemXfer = (pTW_IMAGEMEMXFER) pData;
    LPBYTE buffer;
    int readrows;
    unsigned int curoff;

    TRACE ("DG_IMAGE/DAT_IMAGEMEMXFER/MSG_GET\n");
    if (activeDS.currentState < 6 || activeDS.currentState > 7) {
        activeDS.twCC = TWCC_SEQERROR;
        return TWRC_FAILURE;
    }
    TRACE("pImageMemXfer.Compression is %d\n", pImageMemXfer->Compression);
    if (activeDS.currentState == 6) {
	if (TWRC_SUCCESS != _get_image_and_startup_jpeg()) {
	    FIXME("Failed to get an image\n");
	    activeDS.twCC = TWCC_SEQERROR;
	    return TWRC_FAILURE;
	}

    if (!activeDS.progressWnd)
316 317
        activeDS.progressWnd = TransferringDialogBox(NULL,0);
    TransferringDialogBox(activeDS.progressWnd,0);
318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354

        activeDS.currentState = 7;
    } else {
	if (!activeDS.file) {
    	    activeDS.twCC = TWRC_SUCCESS;
	    return TWRC_XFERDONE;
	}
    }

    if (pImageMemXfer->Memory.Flags & TWMF_HANDLE) {
	FIXME("Memory Handle, may not be locked correctly\n");
	buffer = LocalLock(pImageMemXfer->Memory.TheMem);
    } else
	buffer = pImageMemXfer->Memory.TheMem;
   
    memset(buffer,0,pImageMemXfer->Memory.Length);
    curoff = 0; readrows = 0;
    pImageMemXfer->YOffset	= activeDS.jd.output_scanline;
    pImageMemXfer->XOffset	= 0;	/* we do whole strips */
    while ((activeDS.jd.output_scanline<activeDS.jd.output_height) &&
	   ((pImageMemXfer->Memory.Length - curoff) > activeDS.jd.output_width*activeDS.jd.output_components)
    ) {
	JSAMPROW row = buffer+curoff;
	int x = pjpeg_read_scanlines(&activeDS.jd,&row,1);
	if (x != 1) {
		FIXME("failed to read current scanline?\n");
		break;
	}
	readrows++;
	curoff += activeDS.jd.output_width*activeDS.jd.output_components;
    }
    pImageMemXfer->Compression	= TWCP_NONE;
    pImageMemXfer->BytesPerRow	= activeDS.jd.output_components * activeDS.jd.output_width;
    pImageMemXfer->Rows		= readrows;
    pImageMemXfer->Columns	= activeDS.jd.output_width; /* we do whole strips */
    pImageMemXfer->BytesWritten = curoff;

355
    TransferringDialogBox(activeDS.progressWnd,0);
356 357 358 359 360 361 362 363

    if (activeDS.jd.output_scanline == activeDS.jd.output_height) {
        pjpeg_finish_decompress(&activeDS.jd);
        pjpeg_destroy_decompress(&activeDS.jd);
	gp_file_unref (activeDS.file);
	activeDS.file = NULL;
	TRACE("xfer is done!\n");

364
	/*TransferringDialogBox(activeDS.progressWnd, -1);*/
365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383
	twRC = TWRC_XFERDONE;
    }
    activeDS.twCC = TWRC_SUCCESS;
    if (pImageMemXfer->Memory.Flags & TWMF_HANDLE)
        LocalUnlock(pImageMemXfer->Memory.TheMem);
    return twRC;
#else
    return TWRC_FAILURE;
#endif
}

/* DG_IMAGE/DAT_IMAGENATIVEXFER/MSG_GET */
TW_UINT16 GPHOTO2_ImageNativeXferGet (pTW_IDENTITY pOrigin, 
                                    TW_MEMREF pData)
{
#ifdef HAVE_GPHOTO2
    pTW_UINT32 pHandle = (pTW_UINT32) pData;
    HBITMAP hDIB;
    BITMAPINFO bmpInfo;
384
    LPBYTE bits;
385 386 387 388 389 390 391 392 393 394 395 396
    JSAMPROW samprow, oldsamprow;
    HDC dc;

    FIXME("DG_IMAGE/DAT_IMAGENATIVEXFER/MSG_GET: implemented, but expect program crash due to DIB.\n");

/*  NOTE NOTE NOTE NOTE NOTE NOTE NOTE
 *
 *  While this is a mandatory transfer mode and this function
 *  is correctly implemented and fully works, the calling program
 *  will likely crash after calling.
 *
 *  Reason is that there is a lot of example code that does:
397
 *  bmpinfo = GlobalLock(hBITMAP); ... pointer access to bmpinfo
398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457
 *
 *  Our current HBITMAP handles do not support getting GlobalLocked -> App Crash
 *
 *  This needs a GDI Handle rewrite, at least for DIB sections.
 *  - Marcus
 */
    if (activeDS.currentState != 6) {
        activeDS.twCC = TWCC_SEQERROR;
        return TWRC_FAILURE;
    }
    if (TWRC_SUCCESS != _get_image_and_startup_jpeg()) {
	FIXME("Failed to get an image\n");
	activeDS.twCC = TWCC_OPERATIONERROR;
	return TWRC_FAILURE;
    }
    TRACE("Acquiring image %dx%dx%d bits from gphoto.\n",
	activeDS.jd.output_width, activeDS.jd.output_height,
	activeDS.jd.output_components*8);
    ZeroMemory (&bmpInfo, sizeof (BITMAPINFO));
    bmpInfo.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
    bmpInfo.bmiHeader.biWidth = activeDS.jd.output_width;
    bmpInfo.bmiHeader.biHeight = -activeDS.jd.output_height;
    bmpInfo.bmiHeader.biPlanes = 1;
    bmpInfo.bmiHeader.biBitCount = activeDS.jd.output_components*8;
    bmpInfo.bmiHeader.biCompression = BI_RGB;
    bmpInfo.bmiHeader.biSizeImage = 0;
    bmpInfo.bmiHeader.biXPelsPerMeter = 0;
    bmpInfo.bmiHeader.biYPelsPerMeter = 0;
    bmpInfo.bmiHeader.biClrUsed = 0;
    bmpInfo.bmiHeader.biClrImportant = 0;
    hDIB = CreateDIBSection ((dc = GetDC(activeDS.hwndOwner)), &bmpInfo,
			     DIB_RGB_COLORS, (LPVOID)&bits, 0, 0);
    if (!hDIB) {
	FIXME("Failed creating DIB.\n");
	gp_file_unref (activeDS.file);
	activeDS.file = NULL;
	activeDS.twCC = TWCC_LOWMEMORY;
	return TWRC_FAILURE;
    }
    samprow = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,activeDS.jd.output_width*activeDS.jd.output_components);
    oldsamprow = samprow;
    while ( activeDS.jd.output_scanline<activeDS.jd.output_height ) {
	int i, x = pjpeg_read_scanlines(&activeDS.jd,&samprow,1);
	if (x != 1) {
		FIXME("failed to read current scanline?\n");
		break;
	}
	/* We have to convert from RGB to BGR, see MSDN/ BITMAPINFOHEADER */
	for(i=0;i<activeDS.jd.output_width;i++,samprow+=activeDS.jd.output_components) {
	    *(bits++) = *(samprow+2);
	    *(bits++) = *(samprow+1);
	    *(bits++) = *(samprow);
	}
	bits = (LPBYTE)(((UINT_PTR)bits + 3) & ~3);
	samprow = oldsamprow;
    }
    HeapFree (GetProcessHeap(), 0, samprow);
    gp_file_unref (activeDS.file);
    activeDS.file = NULL;
    ReleaseDC (activeDS.hwndOwner, dc);
458
    *pHandle = (UINT_PTR)hDIB;
459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572
    activeDS.twCC = TWCC_SUCCESS;
    activeDS.currentState = 7;
    return TWRC_XFERDONE;
#else
    return TWRC_FAILURE;
#endif
}

/* DG_IMAGE/DAT_JPEGCOMPRESSION/MSG_GET */
TW_UINT16 GPHOTO2_JPEGCompressionGet (pTW_IDENTITY pOrigin, 
                                    TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_JPEGCOMPRESSION/MSG_GETDEFAULT */
TW_UINT16 GPHOTO2_JPEGCompressionGetDefault (pTW_IDENTITY pOrigin,
                                           
                                           TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_JPEGCOMPRESSION/MSG_RESET */
TW_UINT16 GPHOTO2_JPEGCompressionReset (pTW_IDENTITY pOrigin, 
                                      TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_JPEGCOMPRESSION/MSG_SET */
TW_UINT16 GPHOTO2_JPEGCompressionSet (pTW_IDENTITY pOrigin, 
                                    TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_PALETTE8/MSG_GET */
TW_UINT16 GPHOTO2_Palette8Get (pTW_IDENTITY pOrigin, 
                             TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_PALETTE8/MSG_GETDEFAULT */
TW_UINT16 GPHOTO2_Palette8GetDefault (pTW_IDENTITY pOrigin, 
                                    TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_PALETTE8/MSG_RESET */
TW_UINT16 GPHOTO2_Palette8Reset (pTW_IDENTITY pOrigin, 
                               TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_PALETTE8/MSG_SET */
TW_UINT16 GPHOTO2_Palette8Set (pTW_IDENTITY pOrigin, 
                             TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_RGBRESPONSE/MSG_RESET */
TW_UINT16 GPHOTO2_RGBResponseReset (pTW_IDENTITY pOrigin, 
                                  TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

/* DG_IMAGE/DAT_RGBRESPONSE/MSG_SET */
TW_UINT16 GPHOTO2_RGBResponseSet (pTW_IDENTITY pOrigin, 
                                TW_MEMREF pData)
{
    FIXME ("stub!\n");

    return TWRC_FAILURE;
}

#ifdef HAVE_GPHOTO2
TW_UINT16
_get_gphoto2_file_as_DIB(
    const char *folder, const char *filename, CameraFileType type,
    HWND hwnd, HBITMAP *hDIB
) {
    const unsigned char *filedata;
    unsigned long	filesize;
    int			ret;
    CameraFile		*file;
    struct jpeg_source_mgr		xjsm;
    struct jpeg_decompress_struct	jd;
    struct jpeg_error_mgr		jerr;
    HDC 		dc;
    BITMAPINFO 		bmpInfo;
573
    LPBYTE		bits;
574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667
    JSAMPROW		samprow, oldsamprow;

    if(!libjpeg_handle) {
	if(!load_libjpeg()) {
	    FIXME("Failed reading JPEG because unable to find %s\n", SONAME_LIBJPEG);
	    filedata = NULL;
	    return TWRC_FAILURE;
	}
    }

    gp_file_new (&file);
    ret = gp_camera_file_get(activeDS.camera, folder, filename, type, file, activeDS.context);
    if (ret < GP_OK) {
	FIXME("Failed to get file?\n");
	gp_file_unref (file);
	return TWRC_FAILURE;
    }
    ret = gp_file_get_data_and_size (file, (const char**)&filedata, &filesize);
    if (ret < GP_OK) {
	FIXME("Failed to get file data?\n");
	return TWRC_FAILURE;
    }

    /* FIXME: Actually we might get other types than JPEG ... But only handle JPEG for now */
    if (filedata[0] != 0xff) {
	ERR("File %s/%s might not be JPEG, cannot decode!\n", folder, filename);
    }

    /* This is basically so we can use in-memory data for jpeg decompression.
     * We need to have all the functions.
     */
    xjsm.next_input_byte	= filedata;
    xjsm.bytes_in_buffer	= filesize;
    xjsm.init_source	= _jpeg_init_source;
    xjsm.fill_input_buffer	= _jpeg_fill_input_buffer;
    xjsm.skip_input_data	= _jpeg_skip_input_data;
    xjsm.resync_to_restart	= _jpeg_resync_to_restart;
    xjsm.term_source	= _jpeg_term_source;

    jd.err = pjpeg_std_error(&jerr);
    /* jpeg_create_decompress is a macro that expands to jpeg_CreateDecompress - see jpeglib.h
     * jpeg_create_decompress(&jd); */
    pjpeg_CreateDecompress(&jd, JPEG_LIB_VERSION, (size_t) sizeof(struct jpeg_decompress_struct));
    jd.src = &xjsm;
    ret=pjpeg_read_header(&jd,TRUE);
    jd.out_color_space = JCS_RGB;
    pjpeg_start_decompress(&jd);
    if (ret != JPEG_HEADER_OK) {
	ERR("Jpeg image in stream has bad format, read header returned %d.\n",ret);
	gp_file_unref (file);
	return TWRC_FAILURE;
    }

    ZeroMemory (&bmpInfo, sizeof (BITMAPINFO));
    bmpInfo.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
    bmpInfo.bmiHeader.biWidth = jd.output_width;
    bmpInfo.bmiHeader.biHeight = -jd.output_height;
    bmpInfo.bmiHeader.biPlanes = 1;
    bmpInfo.bmiHeader.biBitCount = jd.output_components*8;
    bmpInfo.bmiHeader.biCompression = BI_RGB;
    bmpInfo.bmiHeader.biSizeImage = 0;
    bmpInfo.bmiHeader.biXPelsPerMeter = 0;
    bmpInfo.bmiHeader.biYPelsPerMeter = 0;
    bmpInfo.bmiHeader.biClrUsed = 0;
    bmpInfo.bmiHeader.biClrImportant = 0;
    *hDIB = CreateDIBSection ((dc = GetDC(hwnd)), &bmpInfo, DIB_RGB_COLORS, (LPVOID)&bits, 0, 0);
    if (!*hDIB) {
	FIXME("Failed creating DIB.\n");
	gp_file_unref (file);
	return TWRC_FAILURE;
    }
    samprow = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,jd.output_width*jd.output_components);
    oldsamprow = samprow;
    while ( jd.output_scanline<jd.output_height ) {
	int i, x = pjpeg_read_scanlines(&jd,&samprow,1);
	if (x != 1) {
	    FIXME("failed to read current scanline?\n");
	    break;
	}
	/* We have to convert from RGB to BGR, see MSDN/ BITMAPINFOHEADER */
	for(i=0;i<jd.output_width;i++,samprow+=jd.output_components) {
	    *(bits++) = *(samprow+2);
	    *(bits++) = *(samprow+1);
	    *(bits++) = *(samprow);
	}
	bits = (LPBYTE)(((UINT_PTR)bits + 3) & ~3);
	samprow = oldsamprow;
    }
    if (hwnd) ReleaseDC (hwnd, dc);
    HeapFree (GetProcessHeap(), 0, samprow);
    gp_file_unref (file);
    return TWRC_SUCCESS;
}
#endif