dlls/windowscodecs/tgaformat.c

   1 /*
   2  * Copyright 2010 Vincent Povirk for CodeWeavers
   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 "config.h"
  20 #include "wine/port.h"
  21
  22 #include <stdarg.h>
  23
  24 #define COBJMACROS
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "objbase.h"
  29 #include "wincodec.h"
  30
  31 #include "wincodecs_private.h"
  32
  33 #include "wine/debug.h"
  34 #include "wine/library.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  37
  38 #include "pshpack1.h"
  39
  40 typedef struct {
  41     BYTE id_length;
  42     BYTE colormap_type;
  43     BYTE image_type;
  44     /* Colormap Specification */
  45     WORD colormap_firstentry;
  46     WORD colormap_length;
  47     BYTE colormap_entrysize;
  48     /* Image Specification */
  49     WORD xorigin;
  50     WORD yorigin;
  51     WORD width;
  52     WORD height;
  53     BYTE depth;
  54     BYTE image_descriptor;
  55 } tga_header;
  56
  57 #define IMAGETYPE_COLORMAPPED 1
  58 #define IMAGETYPE_TRUECOLOR 2
  59 #define IMAGETYPE_GRAYSCALE 3
  60 #define IMAGETYPE_RLE 8
  61
  62 #define IMAGE_ATTRIBUTE_BITCOUNT_MASK 0xf
  63 #define IMAGE_RIGHTTOLEFT 0x10
  64 #define IMAGE_TOPTOBOTTOM 0x20
  65
  66 typedef struct {
  67     DWORD extension_area_offset;
  68     DWORD developer_directory_offset;
  69     char magic[18];
  70 } tga_footer;
  71
  72 static const BYTE tga_footer_magic[18] = "TRUEVISION-XFILE.";
  73
  74 typedef struct {
  75     WORD size;
  76     char author_name[41];
  77     char author_comments[324];
  78     WORD timestamp[6];
  79     char job_name[41];
  80     WORD job_timestamp[6];
  81     char software_id[41];
  82     WORD software_version;
  83     char software_version_letter;
  84     DWORD key_color;
  85     WORD pixel_width;
  86     WORD pixel_height;
  87     WORD gamma_numerator;
  88     WORD gamma_denominator;
  89     DWORD color_correction_offset;
  90     DWORD thumbnail_offset;
  91     DWORD scanline_offset;
  92     BYTE attributes_type;
  93 } tga_extension_area;
  94
  95 #define ATTRIBUTE_NO_ALPHA 0
  96 #define ATTRIBUTE_UNDEFINED 1
  97 #define ATTRIBUTE_UNDEFINED_PRESERVE 2
  98 #define ATTRIBUTE_ALPHA 3
  99 #define ATTRIBUTE_PALPHA 4
 100
 101 #include "poppack.h"
 102
 103 typedef struct {
 104     IWICBitmapDecoder IWICBitmapDecoder_iface;
 105     IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
 106     LONG ref;
 107     BOOL initialized;
 108     IStream *stream;
 109     tga_header header;
 110     tga_extension_area extension_area;
 111     BYTE *imagebits;
 112     BYTE *origin;
 113     int stride;
 114     ULONG id_offset;
 115     ULONG colormap_length;
 116     ULONG colormap_offset;
 117     ULONG image_offset;
 118     ULONG extension_area_offset;
 119     ULONG developer_directory_offset;
 120     CRITICAL_SECTION lock;
 121 } TgaDecoder;
 122
 123 static inline TgaDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
 124 {
 125     return CONTAINING_RECORD(iface, TgaDecoder, IWICBitmapDecoder_iface);
 126 }
 127
 128 static inline TgaDecoder *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
 129 {
 130     return CONTAINING_RECORD(iface, TgaDecoder, IWICBitmapFrameDecode_iface);
 131 }
 132
 133 static HRESULT WINAPI TgaDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
 134     void **ppv)
 135 {
 136     TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
 137     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 138
 139     if (!ppv) return E_INVALIDARG;
 140
 141     if (IsEqualIID(&IID_IUnknown, iid) || IsEqualIID(&IID_IWICBitmapDecoder, iid))
 142     {
 143         *ppv = &This->IWICBitmapDecoder_iface;
 144     }
 145     else
 146     {
 147         *ppv = NULL;
 148         return E_NOINTERFACE;
 149     }
 150
 151     IUnknown_AddRef((IUnknown*)*ppv);
 152     return S_OK;
 153 }
 154
 155 static ULONG WINAPI TgaDecoder_AddRef(IWICBitmapDecoder *iface)
 156 {
 157     TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
 158     ULONG ref = InterlockedIncrement(&This->ref);
 159
 160     TRACE("(%p) refcount=%u\n", iface, ref);
 161
 162     return ref;
 163 }
 164
 165 static ULONG WINAPI TgaDecoder_Release(IWICBitmapDecoder *iface)
 166 {
 167     TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
 168     ULONG ref = InterlockedDecrement(&This->ref);
 169
 170     TRACE("(%p) refcount=%u\n", iface, ref);
 171
 172     if (ref == 0)
 173     {
 174         This->lock.DebugInfo->Spare[0] = 0;
 175         DeleteCriticalSection(&This->lock);
 176         if (This->stream)
 177             IStream_Release(This->stream);
 178         HeapFree(GetProcessHeap(), 0, This->imagebits);
 179         HeapFree(GetProcessHeap(), 0, This);
 180     }
 181
 182     return ref;
 183 }
 184
 185 static HRESULT WINAPI TgaDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *stream,
 186     DWORD *capability)
 187 {
 188     HRESULT hr;
 189
 190     TRACE("(%p,%p,%p)\n", iface, stream, capability);
 191
 192     if (!stream || !capability) return E_INVALIDARG;
 193
 194     hr = IWICBitmapDecoder_Initialize(iface, stream, WICDecodeMetadataCacheOnDemand);
 195     if (hr != S_OK) return hr;
 196
 197     *capability = WICBitmapDecoderCapabilityCanDecodeAllImages |
 198                   WICBitmapDecoderCapabilityCanDecodeSomeImages;
 199     return S_OK;
 200 }
 201
 202 static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
 203     WICDecodeOptions cacheOptions)
 204 {
 205     TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
 206     HRESULT hr=S_OK;
 207     DWORD bytesread;
 208     LARGE_INTEGER seek;
 209     tga_footer footer;
 210     int attribute_bitcount;
 211     int mapped_depth=0;
 212
 213     TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOptions);
 214
 215     EnterCriticalSection(&This->lock);
 216
 217     if (This->initialized)
 218     {
 219         hr = WINCODEC_ERR_WRONGSTATE;
 220         goto end;
 221     }
 222
 223     seek.QuadPart = 0;
 224     hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
 225     if (FAILED(hr)) goto end;
 226
 227     hr = IStream_Read(pIStream, &This->header, sizeof(tga_header), &bytesread);
 228     if (SUCCEEDED(hr) && bytesread != sizeof(tga_header))
 229     {
 230         TRACE("got only %u bytes\n", bytesread);
 231         hr = E_FAIL;
 232     }
 233     if (FAILED(hr)) goto end;
 234
 235     TRACE("imagetype=%u, colormap type=%u, depth=%u, image descriptor=0x%x\n",
 236         This->header.image_type, This->header.colormap_type,
 237         This->header.depth, This->header.image_descriptor);
 238
 239     /* Sanity checking. Since TGA has no clear identifying markers, we need
 240      * to be careful to not load a non-TGA image. */
 241     switch (This->header.image_type)
 242     {
 243     case IMAGETYPE_COLORMAPPED:
 244     case IMAGETYPE_COLORMAPPED|IMAGETYPE_RLE:
 245         if (This->header.colormap_type != 1)
 246             hr = E_FAIL;
 247         mapped_depth = This->header.colormap_entrysize;
 248         break;
 249     case IMAGETYPE_TRUECOLOR:
 250     case IMAGETYPE_TRUECOLOR|IMAGETYPE_RLE:
 251         if (This->header.colormap_type != 0 && This->header.colormap_type != 1)
 252             hr = E_FAIL;
 253         mapped_depth = This->header.depth;
 254         break;
 255     case IMAGETYPE_GRAYSCALE:
 256     case IMAGETYPE_GRAYSCALE|IMAGETYPE_RLE:
 257         if (This->header.colormap_type != 0)
 258             hr = E_FAIL;
 259         mapped_depth = 0;
 260         break;
 261     default:
 262         hr = E_FAIL;
 263     }
 264
 265     if (This->header.depth != 8 && This->header.depth != 16 &&
 266         This->header.depth != 24 && This->header.depth != 32)
 267         hr = E_FAIL;
 268
 269     if ((This->header.image_descriptor & 0xc0) != 0)
 270         hr = E_FAIL;
 271
 272     attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
 273
 274     if (attribute_bitcount &&
 275         !((mapped_depth == 32 && attribute_bitcount == 8) ||
 276           (mapped_depth == 16 && attribute_bitcount == 1)))
 277         hr = E_FAIL;
 278
 279     if (FAILED(hr))
 280     {
 281         WARN("bad tga header\n");
 282         goto end;
 283     }
 284
 285     /* Locate data in the file based on the header. */
 286     This->id_offset = sizeof(tga_header);
 287     This->colormap_offset = This->id_offset + This->header.id_length;
 288     if (This->header.colormap_type == 1)
 289         This->colormap_length = ((This->header.colormap_entrysize+7)/8) * This->header.colormap_length;
 290     else
 291         This->colormap_length = 0;
 292     This->image_offset = This->colormap_offset + This->colormap_length;
 293
 294     /* Read footer if there is one */
 295     seek.QuadPart = -(LONGLONG)sizeof(tga_footer);
 296     hr = IStream_Seek(pIStream, seek, STREAM_SEEK_END, NULL);
 297
 298     if (SUCCEEDED(hr)) {
 299         hr = IStream_Read(pIStream, &footer, sizeof(tga_footer), &bytesread);
 300         if (SUCCEEDED(hr) && bytesread != sizeof(tga_footer))
 301         {
 302             TRACE("got only %u footer bytes\n", bytesread);
 303             hr = E_FAIL;
 304         }
 305
 306         if (memcmp(footer.magic, tga_footer_magic, sizeof(tga_footer_magic)) == 0)
 307         {
 308             This->extension_area_offset = footer.extension_area_offset;
 309             This->developer_directory_offset = footer.developer_directory_offset;
 310         }
 311         else
 312         {
 313             This->extension_area_offset = 0;
 314             This->developer_directory_offset = 0;
 315         }
 316     }
 317     else
 318     {
 319         /* File is too small to have a footer. */
 320         This->extension_area_offset = 0;
 321         This->developer_directory_offset = 0;
 322         hr = S_OK;
 323     }
 324
 325     if (This->extension_area_offset)
 326     {
 327         seek.QuadPart = This->extension_area_offset;
 328         hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
 329         if (FAILED(hr)) goto end;
 330
 331         hr = IStream_Read(pIStream, &This->extension_area, sizeof(tga_extension_area), &bytesread);
 332         if (SUCCEEDED(hr) && bytesread != sizeof(tga_extension_area))
 333         {
 334             TRACE("got only %u extension area bytes\n", bytesread);
 335             hr = E_FAIL;
 336         }
 337         if (SUCCEEDED(hr) && This->extension_area.size < 495)
 338         {
 339             TRACE("extension area is only %u bytes long\n", This->extension_area.size);
 340             hr = E_FAIL;
 341         }
 342         if (FAILED(hr)) goto end;
 343     }
 344
 345     IStream_AddRef(pIStream);
 346     This->stream = pIStream;
 347     This->initialized = TRUE;
 348
 349 end:
 350     LeaveCriticalSection(&This->lock);
 351     return hr;
 352 }
 353
 354 static HRESULT WINAPI TgaDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 355     GUID *pguidContainerFormat)
 356 {
 357     memcpy(pguidContainerFormat, &GUID_WineContainerFormatTga, sizeof(GUID));
 358     return S_OK;
 359 }
 360
 361 static HRESULT WINAPI TgaDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
 362     IWICBitmapDecoderInfo **ppIDecoderInfo)
 363 {
 364     HRESULT hr;
 365     IWICComponentInfo *compinfo;
 366
 367     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 368
 369     hr = CreateComponentInfo(&CLSID_WineTgaDecoder, &compinfo);
 370     if (FAILED(hr)) return hr;
 371
 372     hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
 373         (void**)ppIDecoderInfo);
 374
 375     IWICComponentInfo_Release(compinfo);
 376
 377     return hr;
 378 }
 379
 380 static HRESULT WINAPI TgaDecoder_CopyPalette(IWICBitmapDecoder *iface,
 381     IWICPalette *pIPalette)
 382 {
 383     FIXME("(%p,%p): stub\n", iface, pIPalette);
 384     return E_NOTIMPL;
 385 }
 386
 387 static HRESULT WINAPI TgaDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
 388     IWICMetadataQueryReader **ppIMetadataQueryReader)
 389 {
 390     FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
 391     return E_NOTIMPL;
 392 }
 393
 394 static HRESULT WINAPI TgaDecoder_GetPreview(IWICBitmapDecoder *iface,
 395     IWICBitmapSource **ppIBitmapSource)
 396 {
 397     FIXME("(%p,%p): stub\n", iface, ppIBitmapSource);
 398     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 399 }
 400
 401 static HRESULT WINAPI TgaDecoder_GetColorContexts(IWICBitmapDecoder *iface,
 402     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 403 {
 404     FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
 405     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 406 }
 407
 408 static HRESULT WINAPI TgaDecoder_GetThumbnail(IWICBitmapDecoder *iface,
 409     IWICBitmapSource **ppIThumbnail)
 410 {
 411     FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
 412     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 413 }
 414
 415 static HRESULT WINAPI TgaDecoder_GetFrameCount(IWICBitmapDecoder *iface,
 416     UINT *pCount)
 417 {
 418     if (!pCount) return E_INVALIDARG;
 419
 420     *pCount = 1;
 421     return S_OK;
 422 }
 423
 424 static HRESULT WINAPI TgaDecoder_GetFrame(IWICBitmapDecoder *iface,
 425     UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
 426 {
 427     TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
 428     TRACE("(%p,%p)\n", iface, ppIBitmapFrame);
 429
 430     if (!This->initialized) return WINCODEC_ERR_FRAMEMISSING;
 431
 432     if (index != 0) return E_INVALIDARG;
 433
 434     IWICBitmapDecoder_AddRef(iface);
 435     *ppIBitmapFrame = &This->IWICBitmapFrameDecode_iface;
 436
 437     return S_OK;
 438 }
 439
 440 static const IWICBitmapDecoderVtbl TgaDecoder_Vtbl = {
 441     TgaDecoder_QueryInterface,
 442     TgaDecoder_AddRef,
 443     TgaDecoder_Release,
 444     TgaDecoder_QueryCapability,
 445     TgaDecoder_Initialize,
 446     TgaDecoder_GetContainerFormat,
 447     TgaDecoder_GetDecoderInfo,
 448     TgaDecoder_CopyPalette,
 449     TgaDecoder_GetMetadataQueryReader,
 450     TgaDecoder_GetPreview,
 451     TgaDecoder_GetColorContexts,
 452     TgaDecoder_GetThumbnail,
 453     TgaDecoder_GetFrameCount,
 454     TgaDecoder_GetFrame
 455 };
 456
 457 static HRESULT WINAPI TgaDecoder_Frame_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
 458     void **ppv)
 459 {
 460     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 461
 462     if (!ppv) return E_INVALIDARG;
 463
 464     if (IsEqualIID(&IID_IUnknown, iid) ||
 465         IsEqualIID(&IID_IWICBitmapSource, iid) ||
 466         IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
 467     {
 468         *ppv = iface;
 469     }
 470     else
 471     {
 472         *ppv = NULL;
 473         return E_NOINTERFACE;
 474     }
 475
 476     IUnknown_AddRef((IUnknown*)*ppv);
 477     return S_OK;
 478 }
 479
 480 static ULONG WINAPI TgaDecoder_Frame_AddRef(IWICBitmapFrameDecode *iface)
 481 {
 482     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 483     return IWICBitmapDecoder_AddRef(&This->IWICBitmapDecoder_iface);
 484 }
 485
 486 static ULONG WINAPI TgaDecoder_Frame_Release(IWICBitmapFrameDecode *iface)
 487 {
 488     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 489     return IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
 490 }
 491
 492 static HRESULT WINAPI TgaDecoder_Frame_GetSize(IWICBitmapFrameDecode *iface,
 493     UINT *puiWidth, UINT *puiHeight)
 494 {
 495     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 496
 497     *puiWidth = This->header.width;
 498     *puiHeight = This->header.height;
 499
 500     TRACE("(%p)->(%u,%u)\n", iface, *puiWidth, *puiHeight);
 501
 502     return S_OK;
 503 }
 504
 505 static HRESULT WINAPI TgaDecoder_Frame_GetPixelFormat(IWICBitmapFrameDecode *iface,
 506     WICPixelFormatGUID *pPixelFormat)
 507 {
 508     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 509     int attribute_bitcount;
 510     byte attribute_type;
 511
 512     TRACE("(%p,%p)\n", iface, pPixelFormat);
 513
 514     attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
 515
 516     if (attribute_bitcount && This->extension_area_offset)
 517         attribute_type = This->extension_area.attributes_type;
 518     else if (attribute_bitcount)
 519         attribute_type = ATTRIBUTE_ALPHA;
 520     else
 521         attribute_type = ATTRIBUTE_NO_ALPHA;
 522
 523     switch (This->header.image_type & ~IMAGETYPE_RLE)
 524     {
 525     case IMAGETYPE_COLORMAPPED:
 526         switch (This->header.depth)
 527         {
 528         case 8:
 529             memcpy(pPixelFormat, &GUID_WICPixelFormat8bppIndexed, sizeof(GUID));
 530             break;
 531         default:
 532             FIXME("Unhandled indexed color depth %u\n", This->header.depth);
 533             return E_NOTIMPL;
 534         }
 535         break;
 536     case IMAGETYPE_TRUECOLOR:
 537         switch (This->header.depth)
 538         {
 539         case 16:
 540             switch (attribute_type)
 541             {
 542             case ATTRIBUTE_NO_ALPHA:
 543             case ATTRIBUTE_UNDEFINED:
 544             case ATTRIBUTE_UNDEFINED_PRESERVE:
 545                 memcpy(pPixelFormat, &GUID_WICPixelFormat16bppBGR555, sizeof(GUID));
 546                 break;
 547             case ATTRIBUTE_ALPHA:
 548             case ATTRIBUTE_PALPHA:
 549                 memcpy(pPixelFormat, &GUID_WICPixelFormat16bppBGRA5551, sizeof(GUID));
 550                 break;
 551             default:
 552                 FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
 553                 return E_NOTIMPL;
 554             }
 555             break;
 556         case 24:
 557             memcpy(pPixelFormat, &GUID_WICPixelFormat24bppBGR, sizeof(GUID));
 558             break;
 559         case 32:
 560             switch (attribute_type)
 561             {
 562             case ATTRIBUTE_NO_ALPHA:
 563             case ATTRIBUTE_UNDEFINED:
 564             case ATTRIBUTE_UNDEFINED_PRESERVE:
 565                 memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGR, sizeof(GUID));
 566                 break;
 567             case ATTRIBUTE_ALPHA:
 568                 memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGRA, sizeof(GUID));
 569                 break;
 570             case ATTRIBUTE_PALPHA:
 571                 memcpy(pPixelFormat, &GUID_WICPixelFormat32bppPBGRA, sizeof(GUID));
 572                 break;
 573             default:
 574                 FIXME("Unhandled 32-bit attribute type %u\n", attribute_type);
 575                 return E_NOTIMPL;
 576             }
 577             break;
 578         default:
 579             FIXME("Unhandled truecolor depth %u\n", This->header.depth);
 580             return E_NOTIMPL;
 581         }
 582         break;
 583     case IMAGETYPE_GRAYSCALE:
 584         switch (This->header.depth)
 585         {
 586         case 8:
 587             memcpy(pPixelFormat, &GUID_WICPixelFormat8bppGray, sizeof(GUID));
 588             break;
 589         case 16:
 590             memcpy(pPixelFormat, &GUID_WICPixelFormat16bppGray, sizeof(GUID));
 591             break;
 592         default:
 593             FIXME("Unhandled grayscale depth %u\n", This->header.depth);
 594             return E_NOTIMPL;
 595         }
 596         break;
 597     default:
 598         ERR("Unknown image type %u\n", This->header.image_type);
 599         return E_FAIL;
 600     }
 601
 602     return S_OK;
 603 }
 604
 605 static HRESULT WINAPI TgaDecoder_Frame_GetResolution(IWICBitmapFrameDecode *iface,
 606     double *pDpiX, double *pDpiY)
 607 {
 608     FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
 609     return E_NOTIMPL;
 610 }
 611
 612 static HRESULT WINAPI TgaDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
 613     IWICPalette *pIPalette)
 614 {
 615     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 616     HRESULT hr=S_OK;
 617     WICColor colors[256], *color;
 618     BYTE *colormap_data;
 619     WORD *wcolormap_data;
 620     DWORD *dwcolormap_data;
 621     LARGE_INTEGER seek;
 622     ULONG bytesread;
 623     int depth, attribute_bitcount, attribute_type;
 624     int i;
 625
 626     TRACE("(%p,%p)\n", iface, pIPalette);
 627
 628     if (!This->colormap_length)
 629     {
 630         WARN("no colormap present in this file\n");
 631         return WINCODEC_ERR_PALETTEUNAVAILABLE;
 632     }
 633
 634     if (This->header.colormap_firstentry + This->header.colormap_length > 256)
 635     {
 636         FIXME("cannot read colormap with %i entries starting at %i\n",
 637             This->header.colormap_firstentry + This->header.colormap_length,
 638             This->header.colormap_firstentry);
 639         return E_FAIL;
 640     }
 641
 642     colormap_data = HeapAlloc(GetProcessHeap(), 0, This->colormap_length);
 643     if (!colormap_data) return E_OUTOFMEMORY;
 644
 645     wcolormap_data = (WORD*)colormap_data;
 646     dwcolormap_data = (DWORD*)colormap_data;
 647
 648     EnterCriticalSection(&This->lock);
 649
 650     seek.QuadPart = This->colormap_offset;
 651     hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, NULL);
 652
 653     if (SUCCEEDED(hr))
 654     {
 655         hr = IStream_Read(This->stream, colormap_data, This->colormap_length, &bytesread);
 656         if (SUCCEEDED(hr) && bytesread != This->colormap_length)
 657         {
 658             WARN("expected %i bytes in colormap, got %i\n", This->colormap_length, bytesread);
 659             hr = E_FAIL;
 660         }
 661     }
 662
 663     LeaveCriticalSection(&This->lock);
 664
 665     if (SUCCEEDED(hr))
 666     {
 667         attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
 668
 669         if (attribute_bitcount && This->extension_area_offset)
 670             attribute_type = This->extension_area.attributes_type;
 671         else if (attribute_bitcount)
 672             attribute_type = ATTRIBUTE_ALPHA;
 673         else
 674             attribute_type = ATTRIBUTE_NO_ALPHA;
 675
 676         depth = This->header.colormap_entrysize;
 677         if (depth == 15)
 678         {
 679             depth = 16;
 680             attribute_type = ATTRIBUTE_NO_ALPHA;
 681         }
 682
 683         memset(colors, 0, sizeof(colors));
 684
 685         color = &colors[This->header.colormap_firstentry];
 686
 687         /* Colormap entries can be in any truecolor format, and we have to convert them. */
 688         switch (depth)
 689         {
 690         case 16:
 691             switch (attribute_type)
 692             {
 693             case ATTRIBUTE_NO_ALPHA:
 694             case ATTRIBUTE_UNDEFINED:
 695             case ATTRIBUTE_UNDEFINED_PRESERVE:
 696                 for (i=0; i<This->header.colormap_length; i++)
 697                 {
 698                     WORD srcval = wcolormap_data[i];
 699                     *color++=0xff000000 | /* constant 255 alpha */
 700                              ((srcval << 9) & 0xf80000) | /* r */
 701                              ((srcval << 4) & 0x070000) | /* r - 3 bits */
 702                              ((srcval << 6) & 0x00f800) | /* g */
 703                              ((srcval << 1) & 0x000700) | /* g - 3 bits */
 704                              ((srcval << 3) & 0x0000f8) | /* b */
 705                              ((srcval >> 2) & 0x000007);  /* b - 3 bits */
 706                 }
 707                 break;
 708             case ATTRIBUTE_ALPHA:
 709             case ATTRIBUTE_PALPHA:
 710                 for (i=0; i<This->header.colormap_length; i++)
 711                 {
 712                     WORD srcval = wcolormap_data[i];
 713                     *color++=((srcval & 0x8000) ? 0xff000000 : 0) | /* alpha */
 714                              ((srcval << 9) & 0xf80000) | /* r */
 715                              ((srcval << 4) & 0x070000) | /* r - 3 bits */
 716                              ((srcval << 6) & 0x00f800) | /* g */
 717                              ((srcval << 1) & 0x000700) | /* g - 3 bits */
 718                              ((srcval << 3) & 0x0000f8) | /* b */
 719                              ((srcval >> 2) & 0x000007);  /* b - 3 bits */
 720                 }
 721                 break;
 722             default:
 723                 FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
 724                 hr = E_NOTIMPL;
 725             }
 726             break;
 727         case 24:
 728             for (i=0; i<This->header.colormap_length; i++)
 729             {
 730                 *color++=0xff000000 | /* alpha */
 731                          colormap_data[i*3+2] | /* red */
 732                          colormap_data[i*3+1] | /* green */
 733                          colormap_data[i*3]; /* blue */
 734             }
 735             break;
 736         case 32:
 737             switch (attribute_type)
 738             {
 739             case ATTRIBUTE_NO_ALPHA:
 740             case ATTRIBUTE_UNDEFINED:
 741             case ATTRIBUTE_UNDEFINED_PRESERVE:
 742                 for (i=0; i<This->header.colormap_length; i++)
 743                     *color++=dwcolormap_data[i]|0xff000000;
 744                 break;
 745             case ATTRIBUTE_ALPHA:
 746                 for (i=0; i<This->header.colormap_length; i++)
 747                     *color++=dwcolormap_data[i];
 748                 break;
 749             case ATTRIBUTE_PALPHA:
 750                 /* FIXME: Unpremultiply alpha */
 751             default:
 752                 FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
 753                 hr = E_NOTIMPL;
 754             }
 755             break;
 756         default:
 757             FIXME("Unhandled truecolor depth %u\n", This->header.depth);
 758             hr = E_NOTIMPL;
 759         }
 760     }
 761
 762     HeapFree(GetProcessHeap(), 0, colormap_data);
 763
 764     if (SUCCEEDED(hr))
 765         hr = IWICPalette_InitializeCustom(pIPalette, colors, 256);
 766
 767     return hr;
 768 }
 769
 770 static HRESULT TgaDecoder_ReadRLE(TgaDecoder *This, BYTE *imagebits, int datasize)
 771 {
 772     int i=0, j, bytesperpixel;
 773     ULONG bytesread;
 774     HRESULT hr=S_OK;
 775
 776     bytesperpixel = This->header.depth / 8;
 777
 778     while (i<datasize)
 779     {
 780         BYTE rc;
 781         int count, size;
 782         BYTE pixeldata[4];
 783
 784         hr = IStream_Read(This->stream, &rc, 1, &bytesread);
 785         if (bytesread != 1) hr = E_FAIL;
 786         if (FAILED(hr)) break;
 787
 788         count = (rc&0x7f)+1;
 789         size = count * bytesperpixel;
 790
 791         if (size + i > datasize)
 792         {
 793             WARN("RLE packet too large\n");
 794             hr = E_FAIL;
 795             break;
 796         }
 797
 798         if (rc&0x80)
 799         {
 800             /* Run-length packet */
 801             hr = IStream_Read(This->stream, pixeldata, bytesperpixel, &bytesread);
 802             if (bytesread != bytesperpixel) hr = E_FAIL;
 803             if (FAILED(hr)) break;
 804
 805             if (bytesperpixel == 1)
 806                 memset(&imagebits[i], pixeldata[0], count);
 807             else
 808             {
 809                 for (j=0; j<count; j++)
 810                     memcpy(&imagebits[i+j*bytesperpixel], pixeldata, bytesperpixel);
 811             }
 812         }
 813         else
 814         {
 815             /* Raw packet */
 816             hr = IStream_Read(This->stream, &imagebits[i], size, &bytesread);
 817             if (bytesread != size) hr = E_FAIL;
 818             if (FAILED(hr)) break;
 819         }
 820
 821         i += size;
 822     }
 823
 824     return hr;
 825 }
 826
 827 static HRESULT TgaDecoder_ReadImage(TgaDecoder *This)
 828 {
 829     HRESULT hr=S_OK;
 830     int datasize;
 831     LARGE_INTEGER seek;
 832     ULONG bytesread;
 833
 834     if (This->imagebits)
 835         return S_OK;
 836
 837     EnterCriticalSection(&This->lock);
 838
 839     if (!This->imagebits)
 840     {
 841         if (This->header.image_descriptor & IMAGE_RIGHTTOLEFT)
 842         {
 843             FIXME("Right to left image reading not implemented\n");
 844             hr = E_NOTIMPL;
 845         }
 846
 847         if (SUCCEEDED(hr))
 848         {
 849             datasize = This->header.width * This->header.height * (This->header.depth / 8);
 850             This->imagebits = HeapAlloc(GetProcessHeap(), 0, datasize);
 851             if (!This->imagebits) hr = E_OUTOFMEMORY;
 852         }
 853
 854         if (SUCCEEDED(hr))
 855         {
 856             seek.QuadPart = This->image_offset;
 857             hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, NULL);
 858         }
 859
 860         if (SUCCEEDED(hr))
 861         {
 862             if (This->header.image_type & IMAGETYPE_RLE)
 863             {
 864                 hr = TgaDecoder_ReadRLE(This, This->imagebits, datasize);
 865             }
 866             else
 867             {
 868                 hr = IStream_Read(This->stream, This->imagebits, datasize, &bytesread);
 869                 if (SUCCEEDED(hr) && bytesread != datasize)
 870                     hr = E_FAIL;
 871             }
 872         }
 873
 874         if (SUCCEEDED(hr))
 875         {
 876             if (This->header.image_descriptor & IMAGE_TOPTOBOTTOM)
 877             {
 878                 This->origin = This->imagebits;
 879                 This->stride = This->header.width * (This->header.depth / 8);
 880             }
 881             else
 882             {
 883                 This->stride = -This->header.width * (This->header.depth / 8);
 884                 This->origin = This->imagebits + This->header.width * (This->header.height - 1) * (This->header.depth / 8);
 885             }
 886         }
 887         else
 888         {
 889             HeapFree(GetProcessHeap(), 0, This->imagebits);
 890             This->imagebits = NULL;
 891         }
 892     }
 893
 894     LeaveCriticalSection(&This->lock);
 895
 896     return hr;
 897 }
 898
 899 static HRESULT WINAPI TgaDecoder_Frame_CopyPixels(IWICBitmapFrameDecode *iface,
 900     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 901 {
 902     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 903     HRESULT hr;
 904
 905     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 906
 907     hr = TgaDecoder_ReadImage(This);
 908
 909     if (SUCCEEDED(hr))
 910     {
 911         hr = copy_pixels(This->header.depth, This->origin,
 912             This->header.width, This->header.height, This->stride,
 913             prc, cbStride, cbBufferSize, pbBuffer);
 914     }
 915
 916     return hr;
 917 }
 918
 919 static HRESULT WINAPI TgaDecoder_Frame_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
 920     IWICMetadataQueryReader **ppIMetadataQueryReader)
 921 {
 922     FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
 923     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 924 }
 925
 926 static HRESULT WINAPI TgaDecoder_Frame_GetColorContexts(IWICBitmapFrameDecode *iface,
 927     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 928 {
 929     FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
 930     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 931 }
 932
 933 static HRESULT WINAPI TgaDecoder_Frame_GetThumbnail(IWICBitmapFrameDecode *iface,
 934     IWICBitmapSource **ppIThumbnail)
 935 {
 936     FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
 937     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 938 }
 939
 940 static const IWICBitmapFrameDecodeVtbl TgaDecoder_Frame_Vtbl = {
 941     TgaDecoder_Frame_QueryInterface,
 942     TgaDecoder_Frame_AddRef,
 943     TgaDecoder_Frame_Release,
 944     TgaDecoder_Frame_GetSize,
 945     TgaDecoder_Frame_GetPixelFormat,
 946     TgaDecoder_Frame_GetResolution,
 947     TgaDecoder_Frame_CopyPalette,
 948     TgaDecoder_Frame_CopyPixels,
 949     TgaDecoder_Frame_GetMetadataQueryReader,
 950     TgaDecoder_Frame_GetColorContexts,
 951     TgaDecoder_Frame_GetThumbnail
 952 };
 953
 954 HRESULT TgaDecoder_CreateInstance(REFIID iid, void** ppv)
 955 {
 956     TgaDecoder *This;
 957     HRESULT ret;
 958
 959     TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
 960
 961     *ppv = NULL;
 962
 963     This = HeapAlloc(GetProcessHeap(), 0, sizeof(TgaDecoder));
 964     if (!This) return E_OUTOFMEMORY;
 965
 966     This->IWICBitmapDecoder_iface.lpVtbl = &TgaDecoder_Vtbl;
 967     This->IWICBitmapFrameDecode_iface.lpVtbl = &TgaDecoder_Frame_Vtbl;
 968     This->ref = 1;
 969     This->initialized = FALSE;
 970     This->stream = NULL;
 971     This->imagebits = NULL;
 972     InitializeCriticalSection(&This->lock);
 973     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": TgaDecoder.lock");
 974
 975     ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
 976     IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
 977
 978     return ret;
 979 }