git.oblomov.eu Git - wine/blob - 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;
 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 *pIStream,
 186     DWORD *pdwCapability)
 187 {
 188     FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
 189     return E_NOTIMPL;
 190 }
 191
 192 static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
 193     WICDecodeOptions cacheOptions)
 194 {
 195     TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
 196     HRESULT hr=S_OK;
 197     DWORD bytesread;
 198     LARGE_INTEGER seek;
 199     tga_footer footer;
 200     int attribute_bitcount;
 201     int mapped_depth=0;
 202
 203     TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOptions);
 204
 205     EnterCriticalSection(&This->lock);
 206
 207     if (This->initialized)
 208     {
 209         hr = WINCODEC_ERR_WRONGSTATE;
 210         goto end;
 211     }
 212
 213     seek.QuadPart = 0;
 214     hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
 215     if (FAILED(hr)) goto end;
 216
 217     hr = IStream_Read(pIStream, &This->header, sizeof(tga_header), &bytesread);
 218     if (SUCCEEDED(hr) && bytesread != sizeof(tga_header))
 219     {
 220         TRACE("got only %u bytes\n", bytesread);
 221         hr = E_FAIL;
 222     }
 223     if (FAILED(hr)) goto end;
 224
 225     TRACE("imagetype=%u, colormap type=%u, depth=%u, image descriptor=0x%x\n",
 226         This->header.image_type, This->header.colormap_type,
 227         This->header.depth, This->header.image_descriptor);
 228
 229     /* Sanity checking. Since TGA has no clear identifying markers, we need
 230      * to be careful to not load a non-TGA image. */
 231     switch (This->header.image_type)
 232     {
 233     case IMAGETYPE_COLORMAPPED:
 234     case IMAGETYPE_COLORMAPPED|IMAGETYPE_RLE:
 235         if (This->header.colormap_type != 1)
 236             hr = E_FAIL;
 237         mapped_depth = This->header.colormap_entrysize;
 238         break;
 239     case IMAGETYPE_TRUECOLOR:
 240     case IMAGETYPE_TRUECOLOR|IMAGETYPE_RLE:
 241         if (This->header.colormap_type != 0 && This->header.colormap_type != 1)
 242             hr = E_FAIL;
 243         mapped_depth = This->header.depth;
 244         break;
 245     case IMAGETYPE_GRAYSCALE:
 246     case IMAGETYPE_GRAYSCALE|IMAGETYPE_RLE:
 247         if (This->header.colormap_type != 0)
 248             hr = E_FAIL;
 249         mapped_depth = 0;
 250         break;
 251     default:
 252         hr = E_FAIL;
 253     }
 254
 255     if (This->header.depth != 8 && This->header.depth != 16 &&
 256         This->header.depth != 24 && This->header.depth != 32)
 257         hr = E_FAIL;
 258
 259     if ((This->header.image_descriptor & 0xc0) != 0)
 260         hr = E_FAIL;
 261
 262     attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
 263
 264     if (attribute_bitcount &&
 265         !((mapped_depth == 32 && attribute_bitcount == 8) ||
 266           (mapped_depth == 16 && attribute_bitcount == 1)))
 267         hr = E_FAIL;
 268
 269     if (FAILED(hr))
 270     {
 271         WARN("bad tga header\n");
 272         goto end;
 273     }
 274
 275     /* Locate data in the file based on the header. */
 276     This->id_offset = sizeof(tga_header);
 277     This->colormap_offset = This->id_offset + This->header.id_length;
 278     if (This->header.colormap_type == 1)
 279         This->colormap_length = ((This->header.colormap_entrysize+7)/8) * This->header.colormap_length;
 280     else
 281         This->colormap_length = 0;
 282     This->image_offset = This->colormap_offset + This->colormap_length;
 283
 284     /* Read footer if there is one */
 285     seek.QuadPart = -sizeof(tga_footer);
 286     hr = IStream_Seek(pIStream, seek, STREAM_SEEK_END, NULL);
 287     if (FAILED(hr)) goto end;
 288
 289     hr = IStream_Read(pIStream, &footer, sizeof(tga_footer), &bytesread);
 290     if (SUCCEEDED(hr) && bytesread != sizeof(tga_footer))
 291     {
 292         TRACE("got only %u footer bytes\n", bytesread);
 293         hr = E_FAIL;
 294     }
 295     if (FAILED(hr)) goto end;
 296
 297     if (memcmp(footer.magic, tga_footer_magic, sizeof(tga_footer_magic)) == 0)
 298     {
 299         This->extension_area_offset = footer.extension_area_offset;
 300         This->developer_directory_offset = footer.developer_directory_offset;
 301     }
 302     else
 303     {
 304         This->extension_area_offset = 0;
 305         This->developer_directory_offset = 0;
 306     }
 307
 308     if (This->extension_area_offset)
 309     {
 310         seek.QuadPart = This->extension_area_offset;
 311         hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
 312         if (FAILED(hr)) goto end;
 313
 314         hr = IStream_Read(pIStream, &This->extension_area, sizeof(tga_extension_area), &bytesread);
 315         if (SUCCEEDED(hr) && bytesread != sizeof(tga_extension_area))
 316         {
 317             TRACE("got only %u extension area bytes\n", bytesread);
 318             hr = E_FAIL;
 319         }
 320         if (SUCCEEDED(hr) && This->extension_area.size < 495)
 321         {
 322             TRACE("extension area is only %u bytes long\n", This->extension_area.size);
 323             hr = E_FAIL;
 324         }
 325         if (FAILED(hr)) goto end;
 326     }
 327
 328     IStream_AddRef(pIStream);
 329     This->stream = pIStream;
 330     This->initialized = TRUE;
 331
 332 end:
 333     LeaveCriticalSection(&This->lock);
 334     return hr;
 335 }
 336
 337 static HRESULT WINAPI TgaDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 338     GUID *pguidContainerFormat)
 339 {
 340     memcpy(pguidContainerFormat, &GUID_WineContainerFormatTga, sizeof(GUID));
 341     return S_OK;
 342 }
 343
 344 static HRESULT WINAPI TgaDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
 345     IWICBitmapDecoderInfo **ppIDecoderInfo)
 346 {
 347     FIXME("(%p,%p): stub\n", iface, ppIDecoderInfo);
 348     return E_NOTIMPL;
 349 }
 350
 351 static HRESULT WINAPI TgaDecoder_CopyPalette(IWICBitmapDecoder *iface,
 352     IWICPalette *pIPalette)
 353 {
 354     FIXME("(%p,%p): stub\n", iface, pIPalette);
 355     return E_NOTIMPL;
 356 }
 357
 358 static HRESULT WINAPI TgaDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
 359     IWICMetadataQueryReader **ppIMetadataQueryReader)
 360 {
 361     FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
 362     return E_NOTIMPL;
 363 }
 364
 365 static HRESULT WINAPI TgaDecoder_GetPreview(IWICBitmapDecoder *iface,
 366     IWICBitmapSource **ppIBitmapSource)
 367 {
 368     FIXME("(%p,%p): stub\n", iface, ppIBitmapSource);
 369     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 370 }
 371
 372 static HRESULT WINAPI TgaDecoder_GetColorContexts(IWICBitmapDecoder *iface,
 373     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 374 {
 375     FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
 376     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 377 }
 378
 379 static HRESULT WINAPI TgaDecoder_GetThumbnail(IWICBitmapDecoder *iface,
 380     IWICBitmapSource **ppIThumbnail)
 381 {
 382     FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
 383     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 384 }
 385
 386 static HRESULT WINAPI TgaDecoder_GetFrameCount(IWICBitmapDecoder *iface,
 387     UINT *pCount)
 388 {
 389     *pCount = 1;
 390     return S_OK;
 391 }
 392
 393 static HRESULT WINAPI TgaDecoder_GetFrame(IWICBitmapDecoder *iface,
 394     UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
 395 {
 396     TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
 397     TRACE("(%p,%p)\n", iface, ppIBitmapFrame);
 398
 399     if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
 400
 401     if (index != 0) return E_INVALIDARG;
 402
 403     IWICBitmapDecoder_AddRef(iface);
 404     *ppIBitmapFrame = &This->IWICBitmapFrameDecode_iface;
 405
 406     return S_OK;
 407 }
 408
 409 static const IWICBitmapDecoderVtbl TgaDecoder_Vtbl = {
 410     TgaDecoder_QueryInterface,
 411     TgaDecoder_AddRef,
 412     TgaDecoder_Release,
 413     TgaDecoder_QueryCapability,
 414     TgaDecoder_Initialize,
 415     TgaDecoder_GetContainerFormat,
 416     TgaDecoder_GetDecoderInfo,
 417     TgaDecoder_CopyPalette,
 418     TgaDecoder_GetMetadataQueryReader,
 419     TgaDecoder_GetPreview,
 420     TgaDecoder_GetColorContexts,
 421     TgaDecoder_GetThumbnail,
 422     TgaDecoder_GetFrameCount,
 423     TgaDecoder_GetFrame
 424 };
 425
 426 static HRESULT WINAPI TgaDecoder_Frame_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
 427     void **ppv)
 428 {
 429     TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
 430
 431     if (!ppv) return E_INVALIDARG;
 432
 433     if (IsEqualIID(&IID_IUnknown, iid) ||
 434         IsEqualIID(&IID_IWICBitmapSource, iid) ||
 435         IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
 436     {
 437         *ppv = iface;
 438     }
 439     else
 440     {
 441         *ppv = NULL;
 442         return E_NOINTERFACE;
 443     }
 444
 445     IUnknown_AddRef((IUnknown*)*ppv);
 446     return S_OK;
 447 }
 448
 449 static ULONG WINAPI TgaDecoder_Frame_AddRef(IWICBitmapFrameDecode *iface)
 450 {
 451     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 452     return IUnknown_AddRef((IUnknown*)This);
 453 }
 454
 455 static ULONG WINAPI TgaDecoder_Frame_Release(IWICBitmapFrameDecode *iface)
 456 {
 457     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 458     return IUnknown_Release((IUnknown*)This);
 459 }
 460
 461 static HRESULT WINAPI TgaDecoder_Frame_GetSize(IWICBitmapFrameDecode *iface,
 462     UINT *puiWidth, UINT *puiHeight)
 463 {
 464     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 465
 466     *puiWidth = This->header.width;
 467     *puiHeight = This->header.height;
 468
 469     TRACE("(%p)->(%u,%u)\n", iface, *puiWidth, *puiHeight);
 470
 471     return S_OK;
 472 }
 473
 474 static HRESULT WINAPI TgaDecoder_Frame_GetPixelFormat(IWICBitmapFrameDecode *iface,
 475     WICPixelFormatGUID *pPixelFormat)
 476 {
 477     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 478     int attribute_bitcount;
 479     byte attribute_type;
 480
 481     TRACE("(%p,%p)\n", iface, pPixelFormat);
 482
 483     attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
 484
 485     if (attribute_bitcount && This->extension_area_offset)
 486         attribute_type = This->extension_area.attributes_type;
 487     else if (attribute_bitcount)
 488         attribute_type = ATTRIBUTE_ALPHA;
 489     else
 490         attribute_type = ATTRIBUTE_NO_ALPHA;
 491
 492     switch (This->header.image_type & ~IMAGETYPE_RLE)
 493     {
 494     case IMAGETYPE_COLORMAPPED:
 495         switch (This->header.depth)
 496         {
 497         case 8:
 498             memcpy(pPixelFormat, &GUID_WICPixelFormat8bppIndexed, sizeof(GUID));
 499             break;
 500         default:
 501             FIXME("Unhandled indexed color depth %u\n", This->header.depth);
 502             return E_NOTIMPL;
 503         }
 504         break;
 505     case IMAGETYPE_TRUECOLOR:
 506         switch (This->header.depth)
 507         {
 508         case 16:
 509             switch (attribute_type)
 510             {
 511             case ATTRIBUTE_NO_ALPHA:
 512             case ATTRIBUTE_UNDEFINED:
 513             case ATTRIBUTE_UNDEFINED_PRESERVE:
 514                 memcpy(pPixelFormat, &GUID_WICPixelFormat16bppBGR555, sizeof(GUID));
 515                 break;
 516             case ATTRIBUTE_ALPHA:
 517             case ATTRIBUTE_PALPHA:
 518                 memcpy(pPixelFormat, &GUID_WICPixelFormat16bppBGRA5551, sizeof(GUID));
 519                 break;
 520             default:
 521                 FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
 522                 return E_NOTIMPL;
 523             }
 524             break;
 525         case 24:
 526             memcpy(pPixelFormat, &GUID_WICPixelFormat24bppBGR, sizeof(GUID));
 527             break;
 528         case 32:
 529             switch (attribute_type)
 530             {
 531             case ATTRIBUTE_NO_ALPHA:
 532             case ATTRIBUTE_UNDEFINED:
 533             case ATTRIBUTE_UNDEFINED_PRESERVE:
 534                 memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGR, sizeof(GUID));
 535                 break;
 536             case ATTRIBUTE_ALPHA:
 537                 memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGRA, sizeof(GUID));
 538                 break;
 539             case ATTRIBUTE_PALPHA:
 540                 memcpy(pPixelFormat, &GUID_WICPixelFormat32bppPBGRA, sizeof(GUID));
 541                 break;
 542             default:
 543                 FIXME("Unhandled 32-bit attribute type %u\n", attribute_type);
 544                 return E_NOTIMPL;
 545             }
 546             break;
 547         default:
 548             FIXME("Unhandled truecolor depth %u\n", This->header.depth);
 549             return E_NOTIMPL;
 550         }
 551         break;
 552     case IMAGETYPE_GRAYSCALE:
 553         switch (This->header.depth)
 554         {
 555         case 8:
 556             memcpy(pPixelFormat, &GUID_WICPixelFormat8bppGray, sizeof(GUID));
 557             break;
 558         case 16:
 559             memcpy(pPixelFormat, &GUID_WICPixelFormat16bppGray, sizeof(GUID));
 560             break;
 561         default:
 562             FIXME("Unhandled grayscale depth %u\n", This->header.depth);
 563             return E_NOTIMPL;
 564         }
 565         break;
 566     default:
 567         ERR("Unknown image type %u\n", This->header.image_type);
 568         return E_FAIL;
 569     }
 570
 571     return S_OK;
 572 }
 573
 574 static HRESULT WINAPI TgaDecoder_Frame_GetResolution(IWICBitmapFrameDecode *iface,
 575     double *pDpiX, double *pDpiY)
 576 {
 577     FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
 578     return E_NOTIMPL;
 579 }
 580
 581 static HRESULT WINAPI TgaDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
 582     IWICPalette *pIPalette)
 583 {
 584     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 585     HRESULT hr=S_OK;
 586     WICColor colors[256], *color;
 587     BYTE *colormap_data;
 588     WORD *wcolormap_data;
 589     DWORD *dwcolormap_data;
 590     LARGE_INTEGER seek;
 591     ULONG bytesread;
 592     int depth, attribute_bitcount, attribute_type;
 593     int i;
 594
 595     TRACE("(%p,%p)\n", iface, pIPalette);
 596
 597     if (!This->colormap_length)
 598     {
 599         WARN("no colormap present in this file\n");
 600         return WINCODEC_ERR_PALETTEUNAVAILABLE;
 601     }
 602
 603     if (This->header.colormap_firstentry + This->header.colormap_length > 256)
 604     {
 605         FIXME("cannot read colormap with %i entries starting at %i\n",
 606             This->header.colormap_firstentry + This->header.colormap_length,
 607             This->header.colormap_firstentry);
 608         return E_FAIL;
 609     }
 610
 611     colormap_data = HeapAlloc(GetProcessHeap(), 0, This->colormap_length);
 612     if (!colormap_data) return E_OUTOFMEMORY;
 613
 614     wcolormap_data = (WORD*)colormap_data;
 615     dwcolormap_data = (DWORD*)colormap_data;
 616
 617     EnterCriticalSection(&This->lock);
 618
 619     seek.QuadPart = This->colormap_offset;
 620     hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, NULL);
 621
 622     if (SUCCEEDED(hr))
 623     {
 624         hr = IStream_Read(This->stream, colormap_data, This->colormap_length, &bytesread);
 625         if (SUCCEEDED(hr) && bytesread != This->colormap_length)
 626         {
 627             WARN("expected %i bytes in colormap, got %i\n", This->colormap_length, bytesread);
 628             hr = E_FAIL;
 629         }
 630     }
 631
 632     LeaveCriticalSection(&This->lock);
 633
 634     if (SUCCEEDED(hr))
 635     {
 636         attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
 637
 638         if (attribute_bitcount && This->extension_area_offset)
 639             attribute_type = This->extension_area.attributes_type;
 640         else if (attribute_bitcount)
 641             attribute_type = ATTRIBUTE_ALPHA;
 642         else
 643             attribute_type = ATTRIBUTE_NO_ALPHA;
 644
 645         depth = This->header.colormap_entrysize;
 646         if (depth == 15)
 647         {
 648             depth = 16;
 649             attribute_type = ATTRIBUTE_NO_ALPHA;
 650         }
 651
 652         memset(colors, 0, sizeof(colors));
 653
 654         color = &colors[This->header.colormap_firstentry];
 655
 656         /* Colormap entries can be in any truecolor format, and we have to convert them. */
 657         switch (depth)
 658         {
 659         case 16:
 660             switch (attribute_type)
 661             {
 662             case ATTRIBUTE_NO_ALPHA:
 663             case ATTRIBUTE_UNDEFINED:
 664             case ATTRIBUTE_UNDEFINED_PRESERVE:
 665                 for (i=0; i<This->header.colormap_length; i++)
 666                 {
 667                     WORD srcval = wcolormap_data[i];
 668                     *color++=0xff000000 | /* constant 255 alpha */
 669                              ((srcval << 9) & 0xf80000) | /* r */
 670                              ((srcval << 4) & 0x070000) | /* r - 3 bits */
 671                              ((srcval << 6) & 0x00f800) | /* g */
 672                              ((srcval << 1) & 0x000700) | /* g - 3 bits */
 673                              ((srcval << 3) & 0x0000f8) | /* b */
 674                              ((srcval >> 2) & 0x000007);  /* b - 3 bits */
 675                 }
 676                 break;
 677             case ATTRIBUTE_ALPHA:
 678             case ATTRIBUTE_PALPHA:
 679                 for (i=0; i<This->header.colormap_length; i++)
 680                 {
 681                     WORD srcval = wcolormap_data[i];
 682                     *color++=((srcval & 0x8000) ? 0xff000000 : 0) | /* alpha */
 683                              ((srcval << 9) & 0xf80000) | /* r */
 684                              ((srcval << 4) & 0x070000) | /* r - 3 bits */
 685                              ((srcval << 6) & 0x00f800) | /* g */
 686                              ((srcval << 1) & 0x000700) | /* g - 3 bits */
 687                              ((srcval << 3) & 0x0000f8) | /* b */
 688                              ((srcval >> 2) & 0x000007);  /* b - 3 bits */
 689                 }
 690                 break;
 691             default:
 692                 FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
 693                 hr = E_NOTIMPL;
 694             }
 695             break;
 696         case 24:
 697             for (i=0; i<This->header.colormap_length; i++)
 698             {
 699                 *color++=0xff000000 | /* alpha */
 700                          colormap_data[i*3+2] | /* red */
 701                          colormap_data[i*3+1] | /* green */
 702                          colormap_data[i*3]; /* blue */
 703             }
 704             break;
 705         case 32:
 706             switch (attribute_type)
 707             {
 708             case ATTRIBUTE_NO_ALPHA:
 709             case ATTRIBUTE_UNDEFINED:
 710             case ATTRIBUTE_UNDEFINED_PRESERVE:
 711                 for (i=0; i<This->header.colormap_length; i++)
 712                     *color++=dwcolormap_data[i]|0xff000000;
 713                 break;
 714             case ATTRIBUTE_ALPHA:
 715                 for (i=0; i<This->header.colormap_length; i++)
 716                     *color++=dwcolormap_data[i];
 717                 break;
 718             case ATTRIBUTE_PALPHA:
 719                 /* FIXME: Unpremultiply alpha */
 720             default:
 721                 FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
 722                 hr = E_NOTIMPL;
 723             }
 724             break;
 725         default:
 726             FIXME("Unhandled truecolor depth %u\n", This->header.depth);
 727             hr = E_NOTIMPL;
 728         }
 729     }
 730
 731     HeapFree(GetProcessHeap(), 0, colormap_data);
 732
 733     if (SUCCEEDED(hr))
 734         hr = IWICPalette_InitializeCustom(pIPalette, colors, 256);
 735
 736     return hr;
 737 }
 738
 739 static HRESULT TgaDecoder_ReadRLE(TgaDecoder *This, BYTE *imagebits, int datasize)
 740 {
 741     int i=0, j, bytesperpixel;
 742     ULONG bytesread;
 743     HRESULT hr=S_OK;
 744
 745     bytesperpixel = This->header.depth / 8;
 746
 747     while (i<datasize)
 748     {
 749         BYTE rc;
 750         int count, size;
 751         BYTE pixeldata[4];
 752
 753         hr = IStream_Read(This->stream, &rc, 1, &bytesread);
 754         if (bytesread != 1) hr = E_FAIL;
 755         if (FAILED(hr)) break;
 756
 757         count = (rc&0x7f)+1;
 758         size = count * bytesperpixel;
 759
 760         if (size + i > datasize)
 761         {
 762             WARN("RLE packet too large\n");
 763             hr = E_FAIL;
 764             break;
 765         }
 766
 767         if (rc&0x80)
 768         {
 769             /* Run-length packet */
 770             hr = IStream_Read(This->stream, pixeldata, bytesperpixel, &bytesread);
 771             if (bytesread != bytesperpixel) hr = E_FAIL;
 772             if (FAILED(hr)) break;
 773
 774             if (bytesperpixel == 1)
 775                 memset(&imagebits[i], pixeldata[0], count);
 776             else
 777             {
 778                 for (j=0; j<count; j++)
 779                     memcpy(&imagebits[i+j*bytesperpixel], pixeldata, bytesperpixel);
 780             }
 781         }
 782         else
 783         {
 784             /* Raw packet */
 785             hr = IStream_Read(This->stream, &imagebits[i], size, &bytesread);
 786             if (bytesread != size) hr = E_FAIL;
 787             if (FAILED(hr)) break;
 788         }
 789
 790         i += size;
 791     }
 792
 793     return hr;
 794 }
 795
 796 static HRESULT TgaDecoder_ReadImage(TgaDecoder *This)
 797 {
 798     HRESULT hr=S_OK;
 799     int datasize;
 800     LARGE_INTEGER seek;
 801     ULONG bytesread;
 802
 803     if (This->imagebits)
 804         return S_OK;
 805
 806     EnterCriticalSection(&This->lock);
 807
 808     if (!This->imagebits)
 809     {
 810         if (This->header.image_descriptor & IMAGE_RIGHTTOLEFT)
 811         {
 812             FIXME("Right to left image reading not implemented\n");
 813             hr = E_NOTIMPL;
 814         }
 815
 816         if (SUCCEEDED(hr))
 817         {
 818             datasize = This->header.width * This->header.height * (This->header.depth / 8);
 819             This->imagebits = HeapAlloc(GetProcessHeap(), 0, datasize);
 820             if (!This->imagebits) hr = E_OUTOFMEMORY;
 821         }
 822
 823         if (SUCCEEDED(hr))
 824         {
 825             seek.QuadPart = This->image_offset;
 826             hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, NULL);
 827         }
 828
 829         if (SUCCEEDED(hr))
 830         {
 831             if (This->header.image_type & IMAGETYPE_RLE)
 832             {
 833                 hr = TgaDecoder_ReadRLE(This, This->imagebits, datasize);
 834             }
 835             else
 836             {
 837                 hr = IStream_Read(This->stream, This->imagebits, datasize, &bytesread);
 838                 if (SUCCEEDED(hr) && bytesread != datasize)
 839                     hr = E_FAIL;
 840             }
 841         }
 842
 843         if (SUCCEEDED(hr))
 844         {
 845             if (This->header.image_descriptor & IMAGE_TOPTOBOTTOM)
 846             {
 847                 This->origin = This->imagebits;
 848                 This->stride = This->header.width * (This->header.depth / 8);
 849             }
 850             else
 851             {
 852                 This->stride = -This->header.width * (This->header.depth / 8);
 853                 This->origin = This->imagebits + This->header.width * (This->header.height - 1) * (This->header.depth / 8);
 854             }
 855         }
 856         else
 857         {
 858             HeapFree(GetProcessHeap(), 0, This->imagebits);
 859             This->imagebits = NULL;
 860         }
 861     }
 862
 863     LeaveCriticalSection(&This->lock);
 864
 865     return hr;
 866 }
 867
 868 static HRESULT WINAPI TgaDecoder_Frame_CopyPixels(IWICBitmapFrameDecode *iface,
 869     const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
 870 {
 871     TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
 872     HRESULT hr;
 873
 874     TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
 875
 876     hr = TgaDecoder_ReadImage(This);
 877
 878     if (SUCCEEDED(hr))
 879     {
 880         hr = copy_pixels(This->header.depth, This->origin,
 881             This->header.width, This->header.height, This->stride,
 882             prc, cbStride, cbBufferSize, pbBuffer);
 883     }
 884
 885     return hr;
 886 }
 887
 888 static HRESULT WINAPI TgaDecoder_Frame_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
 889     IWICMetadataQueryReader **ppIMetadataQueryReader)
 890 {
 891     FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
 892     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 893 }
 894
 895 static HRESULT WINAPI TgaDecoder_Frame_GetColorContexts(IWICBitmapFrameDecode *iface,
 896     UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
 897 {
 898     FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
 899     return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 900 }
 901
 902 static HRESULT WINAPI TgaDecoder_Frame_GetThumbnail(IWICBitmapFrameDecode *iface,
 903     IWICBitmapSource **ppIThumbnail)
 904 {
 905     FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
 906     return WINCODEC_ERR_CODECNOTHUMBNAIL;
 907 }
 908
 909 static const IWICBitmapFrameDecodeVtbl TgaDecoder_Frame_Vtbl = {
 910     TgaDecoder_Frame_QueryInterface,
 911     TgaDecoder_Frame_AddRef,
 912     TgaDecoder_Frame_Release,
 913     TgaDecoder_Frame_GetSize,
 914     TgaDecoder_Frame_GetPixelFormat,
 915     TgaDecoder_Frame_GetResolution,
 916     TgaDecoder_Frame_CopyPalette,
 917     TgaDecoder_Frame_CopyPixels,
 918     TgaDecoder_Frame_GetMetadataQueryReader,
 919     TgaDecoder_Frame_GetColorContexts,
 920     TgaDecoder_Frame_GetThumbnail
 921 };
 922
 923 HRESULT TgaDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
 924 {
 925     TgaDecoder *This;
 926     HRESULT ret;
 927
 928     TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
 929
 930     *ppv = NULL;
 931
 932     if (pUnkOuter) return CLASS_E_NOAGGREGATION;
 933
 934     This = HeapAlloc(GetProcessHeap(), 0, sizeof(TgaDecoder));
 935     if (!This) return E_OUTOFMEMORY;
 936
 937     This->IWICBitmapDecoder_iface.lpVtbl = &TgaDecoder_Vtbl;
 938     This->IWICBitmapFrameDecode_iface.lpVtbl = &TgaDecoder_Frame_Vtbl;
 939     This->ref = 1;
 940     This->initialized = FALSE;
 941     This->stream = NULL;
 942     This->imagebits = NULL;
 943     InitializeCriticalSection(&This->lock);
 944     This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": TgaDecoder.lock");
 945
 946     ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
 947     IUnknown_Release((IUnknown*)This);
 948
 949     return ret;
 950 }