dlls/gdiplus/image.c

   1 /*
   2  * Copyright (C) 2007 Google (Evan Stade)
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20
  21 #include "windef.h"
  22 #include "winbase.h"
  23 #include "winuser.h"
  24 #include "wingdi.h"
  25
  26 #define COBJMACROS
  27 #include "objbase.h"
  28 #include "olectl.h"
  29 #include "ole2.h"
  30
  31 #include "gdiplus.h"
  32 #include "gdiplus_private.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
  36
  37 #define PIXELFORMATBPP(x) ((x) ? ((x) >> 8) & 255 : 24)
  38
  39 static INT ipicture_pixel_height(IPicture *pic)
  40 {
  41     HDC hdcref;
  42     OLE_YSIZE_HIMETRIC y;
  43
  44     IPicture_get_Height(pic, &y);
  45
  46     hdcref = GetDC(0);
  47
  48     y = MulDiv(y, GetDeviceCaps(hdcref, LOGPIXELSY), INCH_HIMETRIC);
  49     ReleaseDC(0, hdcref);
  50
  51     return y;
  52 }
  53
  54 static INT ipicture_pixel_width(IPicture *pic)
  55 {
  56     HDC hdcref;
  57     OLE_XSIZE_HIMETRIC x;
  58
  59     IPicture_get_Width(pic, &x);
  60
  61     hdcref = GetDC(0);
  62
  63     x = MulDiv(x, GetDeviceCaps(hdcref, LOGPIXELSX), INCH_HIMETRIC);
  64
  65     ReleaseDC(0, hdcref);
  66
  67     return x;
  68 }
  69
  70 GpStatus WINGDIPAPI GdipBitmapGetPixel(GpBitmap* bitmap, INT x, INT y,
  71     ARGB *color)
  72 {
  73     static int calls;
  74     TRACE("%p %d %d %p\n", bitmap, x, y, color);
  75
  76     if(!bitmap || !color)
  77         return InvalidParameter;
  78
  79     if(!(calls++))
  80         FIXME("not implemented\n");
  81
  82     *color = 0xdeadbeef;
  83
  84     return NotImplemented;
  85 }
  86
  87 /* This function returns a pointer to an array of pixels that represents the
  88  * bitmap. The *entire* bitmap is locked according to the lock mode specified by
  89  * flags.  It is correct behavior that a user who calls this function with write
  90  * privileges can write to the whole bitmap (not just the area in rect).
  91  *
  92  * FIXME: only used portion of format is bits per pixel. */
  93 GpStatus WINGDIPAPI GdipBitmapLockBits(GpBitmap* bitmap, GDIPCONST GpRect* rect,
  94     UINT flags, PixelFormat format, BitmapData* lockeddata)
  95 {
  96     BOOL bm_is_selected;
  97     INT stride, bitspp = PIXELFORMATBPP(format);
  98     OLE_HANDLE hbm;
  99     HDC hdc;
 100     HBITMAP old = NULL;
 101     BITMAPINFO bmi;
 102     BYTE *buff = NULL;
 103     UINT abs_height;
 104
 105     TRACE("%p %p %d %d %p\n", bitmap, rect, flags, format, lockeddata);
 106
 107     if(!lockeddata || !bitmap || !rect)
 108         return InvalidParameter;
 109
 110     if(rect->X < 0 || rect->Y < 0 || (rect->X + rect->Width > bitmap->width) ||
 111        (rect->Y + rect->Height > bitmap->height) || !flags)
 112         return InvalidParameter;
 113
 114     if(flags & ImageLockModeUserInputBuf)
 115         return NotImplemented;
 116
 117     if(bitmap->lockmode)
 118         return WrongState;
 119
 120     IPicture_get_Handle(bitmap->image.picture, &hbm);
 121     IPicture_get_CurDC(bitmap->image.picture, &hdc);
 122     bm_is_selected = (hdc != 0);
 123
 124     bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 125     bmi.bmiHeader.biBitCount = 0;
 126
 127     if(!bm_is_selected){
 128         hdc = CreateCompatibleDC(0);
 129         old = SelectObject(hdc, (HBITMAP)hbm);
 130     }
 131
 132     /* fill out bmi */
 133     GetDIBits(hdc, (HBITMAP)hbm, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
 134
 135     abs_height = abs(bmi.bmiHeader.biHeight);
 136     stride = bmi.bmiHeader.biWidth * bitspp / 8;
 137     stride = (stride + 3) & ~3;
 138
 139     buff = GdipAlloc(stride * abs_height);
 140
 141     bmi.bmiHeader.biBitCount = bitspp;
 142
 143     if(buff)
 144         GetDIBits(hdc, (HBITMAP)hbm, 0, abs_height, buff, &bmi, DIB_RGB_COLORS);
 145
 146     if(!bm_is_selected){
 147         SelectObject(hdc, old);
 148         DeleteDC(hdc);
 149     }
 150
 151     if(!buff)
 152         return OutOfMemory;
 153
 154     lockeddata->Width = rect->Width;
 155     lockeddata->Height = rect->Height;
 156     lockeddata->PixelFormat = format;
 157     lockeddata->Reserved = flags;
 158
 159     if(bmi.bmiHeader.biHeight > 0){
 160         lockeddata->Stride = -stride;
 161         lockeddata->Scan0 = buff + (bitspp / 8) * rect->X +
 162                             stride * (abs_height - 1 - rect->Y);
 163     }
 164     else{
 165         lockeddata->Stride = stride;
 166         lockeddata->Scan0 = buff + (bitspp / 8) * rect->X + stride * rect->Y;
 167     }
 168
 169     bitmap->lockmode = flags;
 170     bitmap->numlocks++;
 171
 172     bitmap->bitmapbits = buff;
 173
 174     return Ok;
 175 }
 176
 177 GpStatus WINGDIPAPI GdipBitmapUnlockBits(GpBitmap* bitmap,
 178     BitmapData* lockeddata)
 179 {
 180     OLE_HANDLE hbm;
 181     HDC hdc;
 182     HBITMAP old = NULL;
 183     BOOL bm_is_selected;
 184     BITMAPINFO bmi;
 185
 186     if(!bitmap || !lockeddata)
 187         return InvalidParameter;
 188
 189     if(!bitmap->lockmode)
 190         return WrongState;
 191
 192     if(lockeddata->Reserved & ImageLockModeUserInputBuf)
 193         return NotImplemented;
 194
 195     if(lockeddata->Reserved & ImageLockModeRead){
 196         if(!(--bitmap->numlocks))
 197             bitmap->lockmode = 0;
 198
 199         GdipFree(bitmap->bitmapbits);
 200         bitmap->bitmapbits = NULL;
 201         return Ok;
 202     }
 203
 204     IPicture_get_Handle(bitmap->image.picture, &hbm);
 205     IPicture_get_CurDC(bitmap->image.picture, &hdc);
 206     bm_is_selected = (hdc != 0);
 207
 208     bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 209     bmi.bmiHeader.biBitCount = 0;
 210
 211     if(!bm_is_selected){
 212         hdc = CreateCompatibleDC(0);
 213         old = SelectObject(hdc, (HBITMAP)hbm);
 214     }
 215
 216     GetDIBits(hdc, (HBITMAP)hbm, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
 217     bmi.bmiHeader.biBitCount = PIXELFORMATBPP(lockeddata->PixelFormat);
 218     SetDIBits(hdc, (HBITMAP)hbm, 0, abs(bmi.bmiHeader.biHeight),
 219               bitmap->bitmapbits, &bmi, DIB_RGB_COLORS);
 220
 221     if(!bm_is_selected){
 222         SelectObject(hdc, old);
 223         DeleteDC(hdc);
 224     }
 225
 226     GdipFree(bitmap->bitmapbits);
 227     bitmap->bitmapbits = NULL;
 228     bitmap->lockmode = 0;
 229
 230     return Ok;
 231 }
 232
 233 GpStatus WINGDIPAPI GdipCreateBitmapFromFile(GDIPCONST WCHAR* filename,
 234     GpBitmap **bitmap)
 235 {
 236     GpStatus stat;
 237     IStream *stream;
 238
 239     if(!filename || !bitmap)
 240         return InvalidParameter;
 241
 242     stat = GdipCreateStreamOnFile(filename, GENERIC_READ, &stream);
 243
 244     if(stat != Ok)
 245         return stat;
 246
 247     stat = GdipCreateBitmapFromStream(stream, bitmap);
 248
 249     IStream_Release(stream);
 250
 251     return stat;
 252 }
 253
 254 /* FIXME: no icm */
 255 GpStatus WINGDIPAPI GdipCreateBitmapFromFileICM(GDIPCONST WCHAR* filename,
 256     GpBitmap **bitmap)
 257 {
 258     return GdipCreateBitmapFromFile(filename, bitmap);
 259 }
 260
 261 GpStatus WINGDIPAPI GdipCreateHBITMAPFromBitmap(GpBitmap* bitmap,
 262     HBITMAP* hbmReturn, ARGB background)
 263 {
 264     FIXME("stub\n");
 265
 266     hbmReturn = NULL;
 267
 268     return NotImplemented;
 269 }
 270
 271 GpStatus WINGDIPAPI GdipConvertToEmfPlus(const GpGraphics* ref,
 272     GpMetafile* metafile, BOOL* succ, EmfType emfType,
 273     const WCHAR* description, GpMetafile** out_metafile)
 274 {
 275     static int calls;
 276
 277     if(!ref || !metafile || !out_metafile)
 278         return InvalidParameter;
 279
 280     *succ = FALSE;
 281     *out_metafile = NULL;
 282
 283     if(!(calls++))
 284         FIXME("not implemented\n");
 285
 286     return NotImplemented;
 287 }
 288
 289 /* FIXME: this should create a bitmap in the given size with the attributes
 290  * (resolution etc.) of the graphics object */
 291 GpStatus WINGDIPAPI GdipCreateBitmapFromGraphics(INT width, INT height,
 292     GpGraphics* target, GpBitmap** bitmap)
 293 {
 294     static int calls;
 295     GpStatus ret;
 296
 297     if(!target || !bitmap)
 298         return InvalidParameter;
 299
 300     if(!(calls++))
 301         FIXME("hacked stub\n");
 302
 303     ret = GdipCreateBitmapFromScan0(width, height, 0, PixelFormat24bppRGB,
 304                                     NULL, bitmap);
 305
 306     return ret;
 307 }
 308
 309 GpStatus WINGDIPAPI GdipCreateBitmapFromScan0(INT width, INT height, INT stride,
 310     PixelFormat format, BYTE* scan0, GpBitmap** bitmap)
 311 {
 312     BITMAPFILEHEADER *bmfh;
 313     BITMAPINFOHEADER *bmih;
 314     BYTE *buff;
 315     INT datalen, size;
 316     IStream *stream;
 317
 318     TRACE("%d %d %d %d %p %p\n", width, height, stride, format, scan0, bitmap);
 319
 320     if(!bitmap || width <= 0 || height <= 0 || (scan0 && (stride % 4))){
 321         *bitmap = NULL;
 322         return InvalidParameter;
 323     }
 324
 325     if(scan0 && !stride)
 326         return InvalidParameter;
 327
 328     /* FIXME: windows allows negative stride (reads backwards from scan0) */
 329     if(stride < 0){
 330         FIXME("negative stride\n");
 331         return InvalidParameter;
 332     }
 333
 334     *bitmap = GdipAlloc(sizeof(GpBitmap));
 335     if(!*bitmap)    return OutOfMemory;
 336
 337     if(stride == 0){
 338         stride = width * (PIXELFORMATBPP(format) / 8);
 339         stride = (stride + 3) & ~3;
 340     }
 341
 342     datalen = abs(stride * height);
 343     size = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + datalen;
 344     buff = GdipAlloc(size);
 345     if(!buff){
 346         GdipFree(*bitmap);
 347         return OutOfMemory;
 348     }
 349
 350     bmfh = (BITMAPFILEHEADER*) buff;
 351     bmih = (BITMAPINFOHEADER*) (bmfh + 1);
 352
 353     bmfh->bfType    = (((WORD)'M') << 8) + (WORD)'B';
 354     bmfh->bfSize    = size;
 355     bmfh->bfOffBits = size - datalen;
 356
 357     bmih->biSize            = sizeof(BITMAPINFOHEADER);
 358     bmih->biWidth           = width;
 359     bmih->biHeight          = -height;
 360     /* FIXME: use the rest of the data from format */
 361     bmih->biBitCount        = PIXELFORMATBPP(format);
 362     bmih->biCompression     = BI_RGB;
 363     bmih->biSizeImage       = datalen;
 364
 365     if(scan0)
 366         memcpy(bmih + 1, scan0, datalen);
 367     else
 368         memset(bmih + 1, 0, datalen);
 369
 370     if(CreateStreamOnHGlobal(buff, TRUE, &stream) != S_OK){
 371         ERR("could not make stream\n");
 372         GdipFree(*bitmap);
 373         GdipFree(buff);
 374         return GenericError;
 375     }
 376
 377     if(OleLoadPicture(stream, 0, FALSE, &IID_IPicture,
 378         (LPVOID*) &((*bitmap)->image.picture)) != S_OK){
 379         TRACE("Could not load picture\n");
 380         IStream_Release(stream);
 381         GdipFree(*bitmap);
 382         GdipFree(buff);
 383         return GenericError;
 384     }
 385
 386     (*bitmap)->image.type = ImageTypeBitmap;
 387     (*bitmap)->width = width;
 388     (*bitmap)->height = height;
 389     (*bitmap)->format = format;
 390
 391     return Ok;
 392 }
 393
 394 GpStatus WINGDIPAPI GdipCreateBitmapFromStream(IStream* stream,
 395     GpBitmap **bitmap)
 396 {
 397     GpStatus stat;
 398
 399     stat = GdipLoadImageFromStream(stream, (GpImage**) bitmap);
 400
 401     if(stat != Ok)
 402         return stat;
 403
 404     if((*bitmap)->image.type != ImageTypeBitmap){
 405         IPicture_Release((*bitmap)->image.picture);
 406         GdipFree(bitmap);
 407         return GenericError; /* FIXME: what error to return? */
 408     }
 409
 410     return Ok;
 411 }
 412
 413 /* FIXME: no icm */
 414 GpStatus WINGDIPAPI GdipCreateBitmapFromStreamICM(IStream* stream,
 415     GpBitmap **bitmap)
 416 {
 417     return GdipCreateBitmapFromStream(stream, bitmap);
 418 }
 419
 420 GpStatus WINGDIPAPI GdipDisposeImage(GpImage *image)
 421 {
 422     HDC hdc;
 423
 424     if(!image)
 425         return InvalidParameter;
 426
 427     IPicture_get_CurDC(image->picture, &hdc);
 428     DeleteDC(hdc);
 429     IPicture_Release(image->picture);
 430     if (image->type == ImageTypeBitmap)
 431         GdipFree(((GpBitmap*)image)->bitmapbits);
 432     GdipFree(image);
 433
 434     return Ok;
 435 }
 436
 437 GpStatus WINGDIPAPI GdipFindFirstImageItem(GpImage *image, ImageItemData* item)
 438 {
 439     if(!image || !item)
 440         return InvalidParameter;
 441
 442     return NotImplemented;
 443 }
 444
 445 GpStatus WINGDIPAPI GdipGetImageBounds(GpImage *image, GpRectF *srcRect,
 446     GpUnit *srcUnit)
 447 {
 448     if(!image || !srcRect || !srcUnit)
 449         return InvalidParameter;
 450     if(image->type == ImageTypeMetafile){
 451         *srcRect = ((GpMetafile*)image)->bounds;
 452         *srcUnit = ((GpMetafile*)image)->unit;
 453     }
 454     else if(image->type == ImageTypeBitmap){
 455         srcRect->X = srcRect->Y = 0.0;
 456         srcRect->Width = (REAL) ((GpBitmap*)image)->width;
 457         srcRect->Height = (REAL) ((GpBitmap*)image)->height;
 458         *srcUnit = UnitPixel;
 459     }
 460     else{
 461         srcRect->X = srcRect->Y = 0.0;
 462         srcRect->Width = ipicture_pixel_width(image->picture);
 463         srcRect->Height = ipicture_pixel_height(image->picture);
 464         *srcUnit = UnitPixel;
 465     }
 466
 467     TRACE("returning (%f, %f) (%f, %f) unit type %d\n", srcRect->X, srcRect->Y,
 468           srcRect->Width, srcRect->Height, *srcUnit);
 469
 470     return Ok;
 471 }
 472
 473 GpStatus WINGDIPAPI GdipGetImageDimension(GpImage *image, REAL *width,
 474     REAL *height)
 475 {
 476     if(!image || !height || !width)
 477         return InvalidParameter;
 478
 479     if(image->type == ImageTypeMetafile){
 480         HDC hdc = GetDC(0);
 481
 482         *height = convert_unit(hdc, ((GpMetafile*)image)->unit) *
 483                         ((GpMetafile*)image)->bounds.Height;
 484
 485         *width = convert_unit(hdc, ((GpMetafile*)image)->unit) *
 486                         ((GpMetafile*)image)->bounds.Width;
 487
 488         ReleaseDC(0, hdc);
 489     }
 490
 491     else if(image->type == ImageTypeBitmap){
 492         *height = ((GpBitmap*)image)->height;
 493         *width = ((GpBitmap*)image)->width;
 494     }
 495     else{
 496         *height = ipicture_pixel_height(image->picture);
 497         *width = ipicture_pixel_width(image->picture);
 498     }
 499
 500     TRACE("returning (%f, %f)\n", *height, *width);
 501     return Ok;
 502 }
 503
 504 GpStatus WINGDIPAPI GdipGetImageGraphicsContext(GpImage *image,
 505     GpGraphics **graphics)
 506 {
 507     HDC hdc;
 508
 509     if(!image || !graphics)
 510         return InvalidParameter;
 511
 512     if(image->type != ImageTypeBitmap){
 513         FIXME("not implemented for image type %d\n", image->type);
 514         return NotImplemented;
 515     }
 516
 517     IPicture_get_CurDC(image->picture, &hdc);
 518
 519     if(!hdc){
 520         hdc = CreateCompatibleDC(0);
 521         IPicture_SelectPicture(image->picture, hdc, NULL, NULL);
 522     }
 523
 524     return GdipCreateFromHDC(hdc, graphics);
 525 }
 526
 527 GpStatus WINGDIPAPI GdipGetImageHeight(GpImage *image, UINT *height)
 528 {
 529     if(!image || !height)
 530         return InvalidParameter;
 531
 532     if(image->type == ImageTypeMetafile){
 533         HDC hdc = GetDC(0);
 534
 535         *height = roundr(convert_unit(hdc, ((GpMetafile*)image)->unit) *
 536                         ((GpMetafile*)image)->bounds.Height);
 537
 538         ReleaseDC(0, hdc);
 539     }
 540     else if(image->type == ImageTypeBitmap)
 541         *height = ((GpBitmap*)image)->height;
 542     else
 543         *height = ipicture_pixel_height(image->picture);
 544
 545     TRACE("returning %d\n", *height);
 546
 547     return Ok;
 548 }
 549
 550 GpStatus WINGDIPAPI GdipGetImageHorizontalResolution(GpImage *image, REAL *res)
 551 {
 552     static int calls;
 553
 554     if(!image || !res)
 555         return InvalidParameter;
 556
 557     if(!(calls++))
 558         FIXME("not implemented\n");
 559
 560     return NotImplemented;
 561 }
 562
 563 /* FIXME: test this function for non-bitmap types */
 564 GpStatus WINGDIPAPI GdipGetImagePixelFormat(GpImage *image, PixelFormat *format)
 565 {
 566     if(!image || !format)
 567         return InvalidParameter;
 568
 569     if(image->type != ImageTypeBitmap)
 570         *format = PixelFormat24bppRGB;
 571     else
 572         *format = ((GpBitmap*) image)->format;
 573
 574     return Ok;
 575 }
 576
 577 GpStatus WINGDIPAPI GdipGetImageRawFormat(GpImage *image, GUID *format)
 578 {
 579     static int calls;
 580
 581     if(!image || !format)
 582         return InvalidParameter;
 583
 584     if(!(calls++))
 585         FIXME("not implemented\n");
 586
 587     return NotImplemented;
 588 }
 589
 590 GpStatus WINGDIPAPI GdipGetImageType(GpImage *image, ImageType *type)
 591 {
 592     if(!image || !type)
 593         return InvalidParameter;
 594
 595     *type = image->type;
 596
 597     return Ok;
 598 }
 599
 600 GpStatus WINGDIPAPI GdipGetImageVerticalResolution(GpImage *image, REAL *res)
 601 {
 602     static int calls;
 603
 604     if(!image || !res)
 605         return InvalidParameter;
 606
 607     if(!(calls++))
 608         FIXME("not implemented\n");
 609
 610     return NotImplemented;
 611 }
 612
 613 GpStatus WINGDIPAPI GdipGetImageWidth(GpImage *image, UINT *width)
 614 {
 615     if(!image || !width)
 616         return InvalidParameter;
 617
 618     if(image->type == ImageTypeMetafile){
 619         HDC hdc = GetDC(0);
 620
 621         *width = roundr(convert_unit(hdc, ((GpMetafile*)image)->unit) *
 622                         ((GpMetafile*)image)->bounds.Width);
 623
 624         ReleaseDC(0, hdc);
 625     }
 626     else if(image->type == ImageTypeBitmap)
 627         *width = ((GpBitmap*)image)->width;
 628     else
 629         *width = ipicture_pixel_width(image->picture);
 630
 631     TRACE("returning %d\n", *width);
 632
 633     return Ok;
 634 }
 635
 636 GpStatus WINGDIPAPI GdipGetMetafileHeaderFromMetafile(GpMetafile * metafile,
 637     MetafileHeader * header)
 638 {
 639     static int calls;
 640
 641     if(!metafile || !header)
 642         return InvalidParameter;
 643
 644     if(!(calls++))
 645         FIXME("not implemented\n");
 646
 647     return Ok;
 648 }
 649
 650 GpStatus WINGDIPAPI GdipGetPropertyItemSize(GpImage *image, PROPID pid,
 651     UINT* size)
 652 {
 653     static int calls;
 654
 655     TRACE("%p %x %p\n", image, pid, size);
 656
 657     if(!size || !image)
 658         return InvalidParameter;
 659
 660     if(!(calls++))
 661         FIXME("not implemented\n");
 662
 663     return NotImplemented;
 664 }
 665
 666 GpStatus WINGDIPAPI GdipImageGetFrameCount(GpImage *image,
 667     GDIPCONST GUID* dimensionID, UINT* count)
 668 {
 669     static int calls;
 670
 671     if(!image || !dimensionID || !count)
 672         return InvalidParameter;
 673
 674     if(!(calls++))
 675         FIXME("not implemented\n");
 676
 677     return NotImplemented;
 678 }
 679
 680 GpStatus WINGDIPAPI GdipImageGetFrameDimensionsList(GpImage* image,
 681     GUID* dimensionIDs, UINT count)
 682 {
 683     static int calls;
 684
 685     if(!image || !dimensionIDs)
 686         return InvalidParameter;
 687
 688     if(!(calls++))
 689         FIXME("not implemented\n");
 690
 691     return Ok;
 692 }
 693
 694 GpStatus WINGDIPAPI GdipImageSelectActiveFrame(GpImage *image,
 695     GDIPCONST GUID* dimensionID, UINT frameidx)
 696 {
 697     static int calls;
 698
 699     if(!image || !dimensionID)
 700         return InvalidParameter;
 701
 702     if(!(calls++))
 703         FIXME("not implemented\n");
 704
 705     return Ok;
 706 }
 707
 708 GpStatus WINGDIPAPI GdipLoadImageFromFile(GDIPCONST WCHAR* filename,
 709                                           GpImage **image)
 710 {
 711     GpStatus stat;
 712     IStream *stream;
 713
 714     if (!filename || !image)
 715         return InvalidParameter;
 716
 717     stat = GdipCreateStreamOnFile(filename, GENERIC_READ, &stream);
 718
 719     if (stat != Ok)
 720         return stat;
 721
 722     stat = GdipLoadImageFromStream(stream, image);
 723
 724     IStream_Release(stream);
 725
 726     return stat;
 727 }
 728
 729 GpStatus WINGDIPAPI GdipLoadImageFromStream(IStream* stream, GpImage **image)
 730 {
 731     IPicture *pic;
 732     short type;
 733
 734     if(!stream || !image)
 735         return InvalidParameter;
 736
 737     if(OleLoadPicture(stream, 0, FALSE, &IID_IPicture,
 738         (LPVOID*) &pic) != S_OK){
 739         TRACE("Could not load picture\n");
 740         return GenericError;
 741     }
 742
 743     IPicture_get_Type(pic, &type);
 744
 745     if(type == PICTYPE_BITMAP){
 746         BITMAPINFO bmi;
 747         BITMAPCOREHEADER* bmch;
 748         OLE_HANDLE hbm;
 749         HDC hdc;
 750
 751         *image = GdipAlloc(sizeof(GpBitmap));
 752         if(!*image) return OutOfMemory;
 753         (*image)->type = ImageTypeBitmap;
 754
 755         (*((GpBitmap**) image))->width = ipicture_pixel_width(pic);
 756         (*((GpBitmap**) image))->height = ipicture_pixel_height(pic);
 757
 758         /* get the pixel format */
 759         IPicture_get_Handle(pic, &hbm);
 760         IPicture_get_CurDC(pic, &hdc);
 761
 762         ZeroMemory(&bmi, sizeof(bmi));
 763         bmch = (BITMAPCOREHEADER*) (&bmi.bmiHeader);
 764         bmch->bcSize = sizeof(BITMAPCOREHEADER);
 765
 766         if(!hdc){
 767             HBITMAP old;
 768             hdc = CreateCompatibleDC(0);
 769             old = SelectObject(hdc, (HBITMAP)hbm);
 770             GetDIBits(hdc, (HBITMAP)hbm, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
 771             SelectObject(hdc, old);
 772             DeleteDC(hdc);
 773         }
 774         else
 775             GetDIBits(hdc, (HBITMAP)hbm, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
 776
 777         (*((GpBitmap**) image))->format = (bmch->bcBitCount << 8) | PixelFormatGDI;
 778     }
 779     else if(type == PICTYPE_METAFILE || type == PICTYPE_ENHMETAFILE){
 780         /* FIXME: missing initialization code */
 781         *image = GdipAlloc(sizeof(GpMetafile));
 782         if(!*image) return OutOfMemory;
 783         (*image)->type = ImageTypeMetafile;
 784     }
 785     else{
 786         *image = GdipAlloc(sizeof(GpImage));
 787         if(!*image) return OutOfMemory;
 788         (*image)->type = ImageTypeUnknown;
 789     }
 790
 791     (*image)->picture = pic;
 792
 793     return Ok;
 794 }
 795
 796 /* FIXME: no ICM */
 797 GpStatus WINGDIPAPI GdipLoadImageFromStreamICM(IStream* stream, GpImage **image)
 798 {
 799     return GdipLoadImageFromStream(stream, image);
 800 }
 801
 802 GpStatus WINGDIPAPI GdipRemovePropertyItem(GpImage *image, PROPID propId)
 803 {
 804     static int calls;
 805
 806     if(!image)
 807         return InvalidParameter;
 808
 809     if(!(calls++))
 810         FIXME("not implemented\n");
 811
 812     return NotImplemented;
 813 }
 814
 815 GpStatus WINGDIPAPI GdipSaveImageToFile(GpImage *image, GDIPCONST WCHAR* filename,
 816                                         GDIPCONST CLSID *clsidEncoder,
 817                                         GDIPCONST EncoderParameters *encoderParams)
 818 {
 819     GpStatus stat;
 820     IStream *stream;
 821
 822     if (!image || !filename|| !clsidEncoder)
 823         return InvalidParameter;
 824
 825     if (!(image->picture))
 826         return InvalidParameter;
 827
 828     stat = GdipCreateStreamOnFile(filename, GENERIC_WRITE, &stream);
 829     if (stat != Ok)
 830         return GenericError;
 831
 832     stat = GdipSaveImageToStream(image, stream, clsidEncoder, encoderParams);
 833
 834     IStream_Release(stream);
 835     return stat;
 836 }
 837
 838 /*************************************************************************
 839  * Encoding functions -
 840  *   These functions encode an image in different image file formats.
 841  */
 842 #define BITMAP_FORMAT_BMP   0x4d42 /* "BM" */
 843 #define BITMAP_FORMAT_JPEG  0xd8ff
 844 #define BITMAP_FORMAT_GIF   0x4947
 845 #define BITMAP_FORMAT_PNG   0x5089
 846 #define BITMAP_FORMAT_APM   0xcdd7
 847
 848 static GpStatus encode_image_BMP(LPVOID bitmap_bits, LPBITMAPINFO bitmap_info,
 849                                  void **output, unsigned int *output_size)
 850 {
 851     int num_palette_entries;
 852     BITMAPFILEHEADER *bmp_file_hdr;
 853     BITMAPINFO *bmp_info_hdr;
 854
 855     if (bitmap_info->bmiHeader.biClrUsed) {
 856         num_palette_entries = bitmap_info->bmiHeader.biClrUsed;
 857         if (num_palette_entries > 256) num_palette_entries = 256;
 858     } else {
 859         if (bitmap_info->bmiHeader.biBitCount <= 8)
 860             num_palette_entries = 1 << bitmap_info->bmiHeader.biBitCount;
 861         else
 862             num_palette_entries = 0;
 863     }
 864
 865     *output_size =
 866         sizeof(BITMAPFILEHEADER) +
 867         sizeof(BITMAPINFOHEADER) +
 868         num_palette_entries * sizeof(RGBQUAD) +
 869         bitmap_info->bmiHeader.biSizeImage;
 870
 871     *output = GdipAlloc(*output_size);
 872
 873     bmp_file_hdr = (BITMAPFILEHEADER*) *output;
 874     bmp_file_hdr->bfType = BITMAP_FORMAT_BMP;
 875     bmp_file_hdr->bfSize = *output_size;
 876     bmp_file_hdr->bfOffBits =
 877         sizeof(BITMAPFILEHEADER) +
 878         sizeof(BITMAPINFOHEADER) +
 879         num_palette_entries * sizeof (RGBQUAD);
 880
 881     bmp_info_hdr = (BITMAPINFO*) ((unsigned char*)(*output) + sizeof(BITMAPFILEHEADER));
 882     memcpy(bmp_info_hdr, bitmap_info, sizeof(BITMAPINFOHEADER) + num_palette_entries * sizeof(RGBQUAD));
 883     memcpy((unsigned char *)(*output) +
 884            sizeof(BITMAPFILEHEADER) +
 885            sizeof(BITMAPINFOHEADER) +
 886            num_palette_entries * sizeof(RGBQUAD),
 887            bitmap_bits, bitmap_info->bmiHeader.biSizeImage);
 888
 889     return Ok;
 890 }
 891
 892 typedef GpStatus encode_image_func(LPVOID bitmap_bits, LPBITMAPINFO bitmap_info,
 893                                    void **output, unsigned int *output_size);
 894
 895 typedef enum {
 896     BMP,
 897     NUM_ENCODERS_SUPPORTED
 898 } ImageFormat;
 899
 900 static const ImageCodecInfo codecs[NUM_ENCODERS_SUPPORTED];
 901 static encode_image_func *const encode_image_funcs[NUM_ENCODERS_SUPPORTED] = {
 902     encode_image_BMP,
 903 };
 904
 905 GpStatus WINGDIPAPI GdipSaveImageToStream(GpImage *image, IStream* stream,
 906     GDIPCONST CLSID* clsid, GDIPCONST EncoderParameters* params)
 907 {
 908     GpStatus stat;
 909     HRESULT hr;
 910     short type;
 911     HBITMAP hbmp;
 912     HBITMAP old_hbmp;
 913     HDC hdc;
 914     int bm_is_selected;
 915     BITMAPINFO bmp_info;
 916     LPVOID bmp_bits;
 917     encode_image_func* encode_image;
 918     LPVOID output;
 919     unsigned int output_size;
 920     unsigned int dummy;
 921     int i;
 922
 923     old_hbmp = 0;
 924     output = NULL;
 925     output_size = 0;
 926
 927     if(!image || !stream)
 928         return InvalidParameter;
 929
 930     if (!image->picture)
 931         return GenericError;
 932
 933     hr = IPicture_get_Type(image->picture, &type);
 934     if (FAILED(hr) || type != PICTYPE_BITMAP)
 935         return GenericError;
 936
 937     /* select correct encoder */
 938     encode_image = NULL;
 939     for (i = 0; i < NUM_ENCODERS_SUPPORTED; i++) {
 940         if (IsEqualCLSID(clsid, &codecs[i].Clsid))
 941             encode_image = encode_image_funcs[i];
 942     }
 943     if (encode_image == NULL)
 944         return UnknownImageFormat;
 945
 946     /* extract underlying hbitmap representation from the IPicture */
 947     hr = IPicture_get_Handle(image->picture, (OLE_HANDLE*)&hbmp);
 948     if (FAILED(hr) || !hbmp)
 949         return GenericError;
 950     hr = IPicture_get_CurDC(image->picture, &hdc);
 951     if (FAILED(hr))
 952         return GenericError;
 953     bm_is_selected = (hdc != 0);
 954     if (!bm_is_selected) {
 955         hdc = CreateCompatibleDC(0);
 956         old_hbmp = SelectObject(hdc, hbmp);
 957     }
 958
 959     /* get bits from HBITMAP */
 960     bmp_info.bmiHeader.biSize = sizeof(bmp_info.bmiHeader);
 961     bmp_info.bmiHeader.biBitCount = 0;
 962     GetDIBits(hdc, hbmp, 0, 0, NULL, &bmp_info, DIB_RGB_COLORS);
 963
 964     bmp_bits = GdipAlloc(bmp_info.bmiHeader.biSizeImage);
 965
 966     if (bmp_bits)
 967         GetDIBits(hdc, hbmp, 0, abs(bmp_info.bmiHeader.biHeight), bmp_bits, &bmp_info, DIB_RGB_COLORS);
 968
 969     if (!bm_is_selected) {
 970         SelectObject(hdc, old_hbmp);
 971         DeleteDC(hdc);
 972     }
 973
 974     if (!bmp_bits)
 975         return OutOfMemory;
 976
 977     stat = encode_image(bmp_bits, &bmp_info, &output, &output_size);
 978     if (stat == Ok)
 979         IStream_Write(stream, output, output_size, &dummy);
 980
 981     GdipFree(output);
 982     GdipFree(bmp_bits);
 983
 984     return stat;
 985 }
 986
 987 GpStatus WINGDIPAPI GdipSetImagePalette(GpImage *image,
 988     GDIPCONST ColorPalette *palette)
 989 {
 990     static int calls;
 991
 992     if(!image || !palette)
 993         return InvalidParameter;
 994
 995     if(!(calls++))
 996         FIXME("not implemented\n");
 997
 998     return NotImplemented;
 999 }
1000
1001 /*************************************************************************
1002  * Encoders -
1003  *   Structures that represent which formats we support for encoding.
1004  */
1005
1006 /* ImageCodecInfo creation routines taken from libgdiplus */
1007 static const WCHAR bmp_codecname[] = {'B', 'u', 'i','l', 't', '-','i', 'n', ' ', 'B', 'M', 'P', 0}; /* Built-in BMP */
1008 static const WCHAR bmp_extension[] = {'*','.','B', 'M', 'P',';', '*','.', 'D','I', 'B',';', '*','.', 'R', 'L', 'E',0}; /* *.BMP;*.DIB;*.RLE */
1009 static const WCHAR bmp_mimetype[] = {'i', 'm', 'a','g', 'e', '/', 'b', 'm', 'p', 0}; /* image/bmp */
1010 static const WCHAR bmp_format[] = {'B', 'M', 'P', 0}; /* BMP */
1011 static const BYTE bmp_sig_pattern[] = { 0x42, 0x4D };
1012 static const BYTE bmp_sig_mask[] = { 0xFF, 0xFF };
1013
1014 static const ImageCodecInfo codecs[NUM_ENCODERS_SUPPORTED] =
1015     {
1016         { /* BMP */
1017             /* Clsid */              { 0x557cf400, 0x1a04, 0x11d3, { 0x9a, 0x73, 0x0, 0x0, 0xf8, 0x1e, 0xf3, 0x2e } },
1018             /* FormatID */           { 0xb96b3cabU, 0x0728U, 0x11d3U, {0x9d, 0x7b, 0x00, 0x00, 0xf8, 0x1e, 0xf3, 0x2e} },
1019             /* CodecName */          bmp_codecname,
1020             /* DllName */            NULL,
1021             /* FormatDescription */  bmp_format,
1022             /* FilenameExtension */  bmp_extension,
1023             /* MimeType */           bmp_mimetype,
1024             /* Flags */              ImageCodecFlagsEncoder | ImageCodecFlagsDecoder | ImageCodecFlagsSupportBitmap | ImageCodecFlagsBuiltin,
1025             /* Version */            1,
1026             /* SigCount */           1,
1027             /* SigSize */            2,
1028             /* SigPattern */         bmp_sig_pattern,
1029             /* SigMask */            bmp_sig_mask,
1030         },
1031     };
1032
1033 GpStatus WINGDIPAPI GdipGetImageEncodersSize(UINT *numEncoders, UINT *size)
1034 {
1035     if (!numEncoders || !size)
1036         return InvalidParameter;
1037
1038     *numEncoders = NUM_ENCODERS_SUPPORTED;
1039     *size = sizeof (codecs);
1040
1041     return Ok;
1042 }
1043
1044 GpStatus WINGDIPAPI GdipGetImageEncoders(UINT numEncoders, UINT size, ImageCodecInfo *encoders)
1045 {
1046     if (!encoders ||
1047         (numEncoders != NUM_ENCODERS_SUPPORTED) ||
1048         (size != sizeof (codecs)))
1049         return GenericError;
1050
1051     memcpy(encoders, codecs, sizeof (codecs));
1052
1053     return Ok;
1054 }
1055 GpStatus WINGDIPAPI GdipCreateBitmapFromHBITMAP(HBITMAP hbm, HPALETTE hpal, GpBitmap** bitmap)
1056 {
1057     BITMAP bm;
1058     GpStatus retval;
1059     PixelFormat format;
1060
1061     if(!hbm || !bitmap)
1062         return InvalidParameter;
1063
1064     /* TODO: Support for device-dependent bitmaps */
1065     if(hpal){
1066         FIXME("no support for device-dependent bitmaps\n");
1067         return NotImplemented;
1068     }
1069
1070     if (GetObjectA(hbm, sizeof(bm), &bm) != sizeof(bm))
1071             return InvalidParameter;
1072
1073     /* TODO: Figure out the correct format for 16, 32, 64 bpp */
1074     switch(bm.bmBitsPixel) {
1075         case 1:
1076             format = PixelFormat1bppIndexed;
1077             break;
1078         case 4:
1079             format = PixelFormat4bppIndexed;
1080             break;
1081         case 8:
1082             format = PixelFormat8bppIndexed;
1083             break;
1084         case 24:
1085             format = PixelFormat24bppRGB;
1086             break;
1087         case 48:
1088             format = PixelFormat48bppRGB;
1089             break;
1090         default:
1091             FIXME("don't know how to handle %d bpp\n", bm.bmBitsPixel);
1092             return InvalidParameter;
1093     }
1094
1095     retval = GdipCreateBitmapFromScan0(bm.bmWidth, bm.bmHeight, bm.bmWidthBytes,
1096         format, bm.bmBits, bitmap);
1097
1098     return retval;
1099 }
1100
1101 GpStatus WINGDIPAPI GdipSetEffectParameters(CGpEffect *effect,
1102     const VOID *params, const UINT size)
1103 {
1104     static int calls;
1105
1106     if(!(calls++))
1107         FIXME("not implemented\n");
1108
1109     return NotImplemented;
1110 }