Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers...
[reactos.git] / dll / win32 / windowscodecs / tiffformat.c
diff --git a/dll/win32/windowscodecs/tiffformat.c b/dll/win32/windowscodecs/tiffformat.c
new file mode 100644 (file)
index 0000000..740de49
--- /dev/null
@@ -0,0 +1,2357 @@
+/*
+ * Copyright 2010 Vincent Povirk for CodeWeavers
+ * Copyright 2016 Dmitry Timoshkov
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include "wincodecs_private.h"
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_TIFFIO_H
+#include <tiffio.h>
+#endif
+
+#ifdef SONAME_LIBTIFF
+
+/* Workaround for broken libtiff 4.x headers on some 64-bit hosts which
+ * define TIFF_UINT64_T/toff_t as 32-bit for 32-bit builds, while they
+ * are supposed to be always 64-bit.
+ * TIFF_UINT64_T doesn't exist in libtiff 3.x, it was introduced in 4.x.
+ */
+#ifdef TIFF_UINT64_T
+# undef toff_t
+# define toff_t UINT64
+#endif
+
+static CRITICAL_SECTION init_tiff_cs;
+static CRITICAL_SECTION_DEBUG init_tiff_cs_debug =
+{
+    0, 0, &init_tiff_cs,
+    { &init_tiff_cs_debug.ProcessLocksList,
+      &init_tiff_cs_debug.ProcessLocksList },
+    0, 0, { (DWORD_PTR)(__FILE__ ": init_tiff_cs") }
+};
+static CRITICAL_SECTION init_tiff_cs = { &init_tiff_cs_debug, -1, 0, 0, 0, 0 };
+
+static const WCHAR wszTiffCompressionMethod[] = {'T','i','f','f','C','o','m','p','r','e','s','s','i','o','n','M','e','t','h','o','d',0};
+static const WCHAR wszCompressionQuality[] = {'C','o','m','p','r','e','s','s','i','o','n','Q','u','a','l','i','t','y',0};
+
+static void *libtiff_handle;
+#define MAKE_FUNCPTR(f) static typeof(f) * p##f
+MAKE_FUNCPTR(TIFFClientOpen);
+MAKE_FUNCPTR(TIFFClose);
+MAKE_FUNCPTR(TIFFCurrentDirOffset);
+MAKE_FUNCPTR(TIFFGetField);
+MAKE_FUNCPTR(TIFFIsByteSwapped);
+MAKE_FUNCPTR(TIFFNumberOfDirectories);
+MAKE_FUNCPTR(TIFFReadDirectory);
+MAKE_FUNCPTR(TIFFReadEncodedStrip);
+MAKE_FUNCPTR(TIFFReadEncodedTile);
+MAKE_FUNCPTR(TIFFSetDirectory);
+MAKE_FUNCPTR(TIFFSetField);
+MAKE_FUNCPTR(TIFFWriteDirectory);
+MAKE_FUNCPTR(TIFFWriteScanline);
+#undef MAKE_FUNCPTR
+
+static void *load_libtiff(void)
+{
+    void *result;
+
+    EnterCriticalSection(&init_tiff_cs);
+
+    if (!libtiff_handle &&
+        (libtiff_handle = wine_dlopen(SONAME_LIBTIFF, RTLD_NOW, NULL, 0)) != NULL)
+    {
+        void * (*pTIFFSetWarningHandler)(void *);
+        void * (*pTIFFSetWarningHandlerExt)(void *);
+
+#define LOAD_FUNCPTR(f) \
+    if((p##f = wine_dlsym(libtiff_handle, #f, NULL, 0)) == NULL) { \
+        ERR("failed to load symbol %s\n", #f); \
+        libtiff_handle = NULL; \
+        LeaveCriticalSection(&init_tiff_cs); \
+        return NULL; \
+    }
+        LOAD_FUNCPTR(TIFFClientOpen);
+        LOAD_FUNCPTR(TIFFClose);
+        LOAD_FUNCPTR(TIFFCurrentDirOffset);
+        LOAD_FUNCPTR(TIFFGetField);
+        LOAD_FUNCPTR(TIFFIsByteSwapped);
+        LOAD_FUNCPTR(TIFFNumberOfDirectories);
+        LOAD_FUNCPTR(TIFFReadDirectory);
+        LOAD_FUNCPTR(TIFFReadEncodedStrip);
+        LOAD_FUNCPTR(TIFFReadEncodedTile);
+        LOAD_FUNCPTR(TIFFSetDirectory);
+        LOAD_FUNCPTR(TIFFSetField);
+        LOAD_FUNCPTR(TIFFWriteDirectory);
+        LOAD_FUNCPTR(TIFFWriteScanline);
+#undef LOAD_FUNCPTR
+
+        if ((pTIFFSetWarningHandler = wine_dlsym(libtiff_handle, "TIFFSetWarningHandler", NULL, 0)))
+            pTIFFSetWarningHandler(NULL);
+        if ((pTIFFSetWarningHandlerExt = wine_dlsym(libtiff_handle, "TIFFSetWarningHandlerExt", NULL, 0)))
+            pTIFFSetWarningHandlerExt(NULL);
+    }
+
+    result = libtiff_handle;
+
+    LeaveCriticalSection(&init_tiff_cs);
+    return result;
+}
+
+static tsize_t tiff_stream_read(thandle_t client_data, tdata_t data, tsize_t size)
+{
+    IStream *stream = (IStream*)client_data;
+    ULONG bytes_read;
+    HRESULT hr;
+
+    hr = IStream_Read(stream, data, size, &bytes_read);
+    if (FAILED(hr)) bytes_read = 0;
+    return bytes_read;
+}
+
+static tsize_t tiff_stream_write(thandle_t client_data, tdata_t data, tsize_t size)
+{
+    IStream *stream = (IStream*)client_data;
+    ULONG bytes_written;
+    HRESULT hr;
+
+    hr = IStream_Write(stream, data, size, &bytes_written);
+    if (FAILED(hr)) bytes_written = 0;
+    return bytes_written;
+}
+
+static toff_t tiff_stream_seek(thandle_t client_data, toff_t offset, int whence)
+{
+    IStream *stream = (IStream*)client_data;
+    LARGE_INTEGER move;
+    DWORD origin;
+    ULARGE_INTEGER new_position;
+    HRESULT hr;
+
+    move.QuadPart = offset;
+    switch (whence)
+    {
+        case SEEK_SET:
+            origin = STREAM_SEEK_SET;
+            break;
+        case SEEK_CUR:
+            origin = STREAM_SEEK_CUR;
+            break;
+        case SEEK_END:
+            origin = STREAM_SEEK_END;
+            break;
+        default:
+            ERR("unknown whence value %i\n", whence);
+            return -1;
+    }
+
+    hr = IStream_Seek(stream, move, origin, &new_position);
+    if (SUCCEEDED(hr)) return new_position.QuadPart;
+    else return -1;
+}
+
+static int tiff_stream_close(thandle_t client_data)
+{
+    /* Caller is responsible for releasing the stream object. */
+    return 0;
+}
+
+static toff_t tiff_stream_size(thandle_t client_data)
+{
+    IStream *stream = (IStream*)client_data;
+    STATSTG statstg;
+    HRESULT hr;
+
+    hr = IStream_Stat(stream, &statstg, STATFLAG_NONAME);
+
+    if (SUCCEEDED(hr)) return statstg.cbSize.QuadPart;
+    else return -1;
+}
+
+static int tiff_stream_map(thandle_t client_data, tdata_t *addr, toff_t *size)
+{
+    /* Cannot mmap streams */
+    return 0;
+}
+
+static void tiff_stream_unmap(thandle_t client_data, tdata_t addr, toff_t size)
+{
+    /* No need to ever do this, since we can't map things. */
+}
+
+static TIFF* tiff_open_stream(IStream *stream, const char *mode)
+{
+    LARGE_INTEGER zero;
+
+    zero.QuadPart = 0;
+    IStream_Seek(stream, zero, STREAM_SEEK_SET, NULL);
+
+    return pTIFFClientOpen("<IStream object>", mode, stream, tiff_stream_read,
+        tiff_stream_write, (void *)tiff_stream_seek, tiff_stream_close,
+        (void *)tiff_stream_size, (void *)tiff_stream_map, (void *)tiff_stream_unmap);
+}
+
+typedef struct {
+    IWICBitmapDecoder IWICBitmapDecoder_iface;
+    LONG ref;
+    IStream *stream;
+    CRITICAL_SECTION lock; /* Must be held when tiff is used or initialized is set */
+    TIFF *tiff;
+    BOOL initialized;
+} TiffDecoder;
+
+typedef struct {
+    const WICPixelFormatGUID *format;
+    int bps;
+    int samples;
+    int bpp, source_bpp;
+    int planar;
+    int indexed;
+    int reverse_bgr;
+    int invert_grayscale;
+    UINT width, height;
+    UINT tile_width, tile_height;
+    UINT tile_stride;
+    UINT tile_size;
+    int tiled;
+    UINT tiles_across;
+    UINT resolution_unit;
+    float xres, yres;
+} tiff_decode_info;
+
+typedef struct {
+    IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
+    IWICMetadataBlockReader IWICMetadataBlockReader_iface;
+    LONG ref;
+    TiffDecoder *parent;
+    UINT index;
+    tiff_decode_info decode_info;
+    INT cached_tile_x, cached_tile_y;
+    BYTE *cached_tile;
+} TiffFrameDecode;
+
+static const IWICBitmapFrameDecodeVtbl TiffFrameDecode_Vtbl;
+static const IWICMetadataBlockReaderVtbl TiffFrameDecode_BlockVtbl;
+
+static inline TiffDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
+{
+    return CONTAINING_RECORD(iface, TiffDecoder, IWICBitmapDecoder_iface);
+}
+
+static inline TiffFrameDecode *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
+{
+    return CONTAINING_RECORD(iface, TiffFrameDecode, IWICBitmapFrameDecode_iface);
+}
+
+static inline TiffFrameDecode *impl_from_IWICMetadataBlockReader(IWICMetadataBlockReader *iface)
+{
+    return CONTAINING_RECORD(iface, TiffFrameDecode, IWICMetadataBlockReader_iface);
+}
+
+static HRESULT tiff_get_decode_info(TIFF *tiff, tiff_decode_info *decode_info)
+{
+    uint16 photometric, bps, samples, planar;
+    uint16 extra_sample_count, extra_sample, *extra_samples;
+    int ret;
+
+    decode_info->indexed = 0;
+    decode_info->reverse_bgr = 0;
+    decode_info->invert_grayscale = 0;
+    decode_info->tiled = 0;
+
+    ret = pTIFFGetField(tiff, TIFFTAG_PHOTOMETRIC, &photometric);
+    if (!ret)
+    {
+        WARN("missing PhotometricInterpretation tag\n");
+        return E_FAIL;
+    }
+
+    ret = pTIFFGetField(tiff, TIFFTAG_BITSPERSAMPLE, &bps);
+    if (!ret) bps = 1;
+    decode_info->bps = bps;
+
+    ret = pTIFFGetField(tiff, TIFFTAG_SAMPLESPERPIXEL, &samples);
+    if (!ret) samples = 1;
+    decode_info->samples = samples;
+
+    if (samples == 1)
+        planar = 1;
+    else
+    {
+        ret = pTIFFGetField(tiff, TIFFTAG_PLANARCONFIG, &planar);
+        if (!ret) planar = 1;
+        if (planar != 1)
+        {
+            FIXME("unhandled planar configuration %u\n", planar);
+            return E_FAIL;
+        }
+    }
+    decode_info->planar = planar;
+
+    TRACE("planar %u, photometric %u, samples %u, bps %u\n", planar, photometric, samples, bps);
+
+    switch(photometric)
+    {
+    case 0: /* WhiteIsZero */
+        decode_info->invert_grayscale = 1;
+        /* fall through */
+    case 1: /* BlackIsZero */
+        if (samples == 2)
+        {
+            ret = pTIFFGetField(tiff, TIFFTAG_EXTRASAMPLES, &extra_sample_count, &extra_samples);
+            if (!ret)
+            {
+                extra_sample_count = 1;
+                extra_sample = 0;
+                extra_samples = &extra_sample;
+            }
+        }
+        else if (samples != 1)
+        {
+            FIXME("unhandled %dbpp sample count %u\n", bps, samples);
+            return E_FAIL;
+        }
+
+        decode_info->bpp = bps * samples;
+        decode_info->source_bpp = decode_info->bpp;
+        switch (bps)
+        {
+        case 1:
+            if (samples != 1)
+            {
+                FIXME("unhandled 1bpp sample count %u\n", samples);
+                return E_FAIL;
+            }
+            decode_info->format = &GUID_WICPixelFormatBlackWhite;
+            break;
+        case 4:
+            if (samples != 1)
+            {
+                FIXME("unhandled 4bpp grayscale sample count %u\n", samples);
+                return E_FAIL;
+            }
+            decode_info->format = &GUID_WICPixelFormat4bppGray;
+            break;
+        case 8:
+            if (samples == 1)
+                decode_info->format = &GUID_WICPixelFormat8bppGray;
+            else
+            {
+                decode_info->bpp = 32;
+
+                switch(extra_samples[0])
+                {
+                case 1: /* Associated (pre-multiplied) alpha data */
+                    decode_info->format = &GUID_WICPixelFormat32bppPBGRA;
+                    break;
+                case 0: /* Unspecified data */
+                case 2: /* Unassociated alpha data */
+                    decode_info->format = &GUID_WICPixelFormat32bppBGRA;
+                    break;
+                default:
+                    FIXME("unhandled extra sample type %u\n", extra_samples[0]);
+                    return E_FAIL;
+                }
+            }
+            break;
+        case 16:
+            if (samples != 1)
+            {
+                FIXME("unhandled 16bpp grayscale sample count %u\n", samples);
+                return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
+            }
+            decode_info->format = &GUID_WICPixelFormat16bppGray;
+            break;
+        case 32:
+            if (samples != 1)
+            {
+                FIXME("unhandled 32bpp grayscale sample count %u\n", samples);
+                return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
+            }
+            decode_info->format = &GUID_WICPixelFormat32bppGrayFloat;
+            break;
+        default:
+            WARN("unhandled greyscale bit count %u\n", bps);
+            return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
+        }
+        break;
+    case 2: /* RGB */
+        if (samples == 4)
+        {
+            ret = pTIFFGetField(tiff, TIFFTAG_EXTRASAMPLES, &extra_sample_count, &extra_samples);
+            if (!ret)
+            {
+                extra_sample_count = 1;
+                extra_sample = 0;
+                extra_samples = &extra_sample;
+            }
+        }
+        else if (samples != 3)
+        {
+            FIXME("unhandled RGB sample count %u\n", samples);
+            return E_FAIL;
+        }
+
+        decode_info->bpp = max(bps, 8) * samples;
+        decode_info->source_bpp = bps * samples;
+        switch(bps)
+        {
+        case 1:
+        case 4:
+        case 8:
+            decode_info->reverse_bgr = 1;
+            if (samples == 3)
+                decode_info->format = &GUID_WICPixelFormat24bppBGR;
+            else
+                switch(extra_samples[0])
+                {
+                case 1: /* Associated (pre-multiplied) alpha data */
+                    decode_info->format = &GUID_WICPixelFormat32bppPBGRA;
+                    break;
+                case 0: /* Unspecified data */
+                case 2: /* Unassociated alpha data */
+                    decode_info->format = &GUID_WICPixelFormat32bppBGRA;
+                    break;
+                default:
+                    FIXME("unhandled extra sample type %i\n", extra_samples[0]);
+                    return E_FAIL;
+                }
+            break;
+        case 16:
+            if (samples == 3)
+                decode_info->format = &GUID_WICPixelFormat48bppRGB;
+            else
+                switch(extra_samples[0])
+                {
+                case 1: /* Associated (pre-multiplied) alpha data */
+                    decode_info->format = &GUID_WICPixelFormat64bppPRGBA;
+                    break;
+                case 0: /* Unspecified data */
+                case 2: /* Unassociated alpha data */
+                    decode_info->format = &GUID_WICPixelFormat64bppRGBA;
+                    break;
+                default:
+                    FIXME("unhandled extra sample type %i\n", extra_samples[0]);
+                    return E_FAIL;
+                }
+            break;
+        case 32:
+            if (samples != 4)
+            {
+                FIXME("unhandled 32bpp RGB sample count %u\n", samples);
+                return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
+            }
+            decode_info->format = &GUID_WICPixelFormat128bppRGBAFloat;
+            break;
+        default:
+            WARN("unhandled RGB bit count %u\n", bps);
+            return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
+        }
+        break;
+    case 3: /* RGB Palette */
+        if (samples != 1)
+        {
+            FIXME("unhandled indexed sample count %u\n", samples);
+            return E_FAIL;
+        }
+
+        decode_info->indexed = 1;
+        decode_info->bpp = bps;
+        switch (bps)
+        {
+        case 1:
+            decode_info->format = &GUID_WICPixelFormat1bppIndexed;
+            break;
+        case 2:
+            decode_info->format = &GUID_WICPixelFormat2bppIndexed;
+            break;
+        case 4:
+            decode_info->format = &GUID_WICPixelFormat4bppIndexed;
+            break;
+        case 8:
+            decode_info->format = &GUID_WICPixelFormat8bppIndexed;
+            break;
+        default:
+            FIXME("unhandled indexed bit count %u\n", bps);
+            return E_FAIL;
+        }
+        break;
+
+    case 5: /* Separated */
+        if (samples != 4)
+        {
+            FIXME("unhandled Separated sample count %u\n", samples);
+            return E_FAIL;
+        }
+
+        decode_info->bpp = bps * samples;
+        switch(bps)
+        {
+        case 8:
+            decode_info->format = &GUID_WICPixelFormat32bppCMYK;
+            break;
+        case 16:
+            decode_info->format = &GUID_WICPixelFormat64bppCMYK;
+            break;
+
+        default:
+            WARN("unhandled Separated bit count %u\n", bps);
+            return WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT;
+        }
+        break;
+
+    case 4: /* Transparency mask */
+    case 6: /* YCbCr */
+    case 8: /* CIELab */
+    default:
+        FIXME("unhandled PhotometricInterpretation %u\n", photometric);
+        return E_FAIL;
+    }
+
+    ret = pTIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &decode_info->width);
+    if (!ret)
+    {
+        WARN("missing image width\n");
+        return E_FAIL;
+    }
+
+    ret = pTIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &decode_info->height);
+    if (!ret)
+    {
+        WARN("missing image length\n");
+        return E_FAIL;
+    }
+
+    if ((ret = pTIFFGetField(tiff, TIFFTAG_TILEWIDTH, &decode_info->tile_width)))
+    {
+        decode_info->tiled = 1;
+
+        ret = pTIFFGetField(tiff, TIFFTAG_TILELENGTH, &decode_info->tile_height);
+        if (!ret)
+        {
+            WARN("missing tile height\n");
+            return E_FAIL;
+        }
+
+        decode_info->tile_stride = ((decode_info->bpp * decode_info->tile_width + 7)/8);
+        decode_info->tile_size = decode_info->tile_height * decode_info->tile_stride;
+        decode_info->tiles_across = (decode_info->width + decode_info->tile_width - 1) / decode_info->tile_width;
+    }
+    else if ((ret = pTIFFGetField(tiff, TIFFTAG_ROWSPERSTRIP, &decode_info->tile_height)))
+    {
+        if (decode_info->tile_height > decode_info->height)
+            decode_info->tile_height = decode_info->height;
+        decode_info->tile_width = decode_info->width;
+        decode_info->tile_stride = ((decode_info->bpp * decode_info->tile_width + 7)/8);
+        decode_info->tile_size = decode_info->tile_height * decode_info->tile_stride;
+    }
+    else
+    {
+        /* Some broken TIFF files have a single strip and lack the RowsPerStrip tag */
+        decode_info->tile_height = decode_info->height;
+        decode_info->tile_width = decode_info->width;
+        decode_info->tile_stride = ((decode_info->bpp * decode_info->tile_width + 7)/8);
+        decode_info->tile_size = decode_info->tile_height * decode_info->tile_stride;
+    }
+
+    decode_info->resolution_unit = 0;
+    pTIFFGetField(tiff, TIFFTAG_RESOLUTIONUNIT, &decode_info->resolution_unit);
+    if (decode_info->resolution_unit != 0)
+    {
+        ret = pTIFFGetField(tiff, TIFFTAG_XRESOLUTION, &decode_info->xres);
+        if (!ret)
+        {
+            WARN("missing X resolution\n");
+            decode_info->resolution_unit = 0;
+        }
+
+        ret = pTIFFGetField(tiff, TIFFTAG_YRESOLUTION, &decode_info->yres);
+        if (!ret)
+        {
+            WARN("missing Y resolution\n");
+            decode_info->resolution_unit = 0;
+        }
+    }
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
+    void **ppv)
+{
+    TiffDecoder *This = impl_from_IWICBitmapDecoder(iface);
+    TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
+
+    if (!ppv) return E_INVALIDARG;
+
+    if (IsEqualIID(&IID_IUnknown, iid) ||
+        IsEqualIID(&IID_IWICBitmapDecoder, iid))
+    {
+        *ppv = &This->IWICBitmapDecoder_iface;
+    }
+    else
+    {
+        *ppv = NULL;
+        return E_NOINTERFACE;
+    }
+
+    IUnknown_AddRef((IUnknown*)*ppv);
+    return S_OK;
+}
+
+static ULONG WINAPI TiffDecoder_AddRef(IWICBitmapDecoder *iface)
+{
+    TiffDecoder *This = impl_from_IWICBitmapDecoder(iface);
+    ULONG ref = InterlockedIncrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    return ref;
+}
+
+static ULONG WINAPI TiffDecoder_Release(IWICBitmapDecoder *iface)
+{
+    TiffDecoder *This = impl_from_IWICBitmapDecoder(iface);
+    ULONG ref = InterlockedDecrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    if (ref == 0)
+    {
+        if (This->tiff) pTIFFClose(This->tiff);
+        if (This->stream) IStream_Release(This->stream);
+        This->lock.DebugInfo->Spare[0] = 0;
+        DeleteCriticalSection(&This->lock);
+        HeapFree(GetProcessHeap(), 0, This);
+    }
+
+    return ref;
+}
+
+static HRESULT WINAPI TiffDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *stream,
+    DWORD *capability)
+{
+    HRESULT hr;
+
+    TRACE("(%p,%p,%p)\n", iface, stream, capability);
+
+    if (!stream || !capability) return E_INVALIDARG;
+
+    hr = IWICBitmapDecoder_Initialize(iface, stream, WICDecodeMetadataCacheOnDemand);
+    if (hr != S_OK) return hr;
+
+    *capability = WICBitmapDecoderCapabilityCanDecodeAllImages |
+                  WICBitmapDecoderCapabilityCanDecodeSomeImages |
+                  WICBitmapDecoderCapabilityCanEnumerateMetadata;
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
+    WICDecodeOptions cacheOptions)
+{
+    TiffDecoder *This = impl_from_IWICBitmapDecoder(iface);
+    TIFF *tiff;
+    tiff_decode_info decode_info;
+    HRESULT hr=S_OK;
+
+    TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
+
+    EnterCriticalSection(&This->lock);
+
+    if (This->initialized)
+    {
+        hr = WINCODEC_ERR_WRONGSTATE;
+        goto exit;
+    }
+
+    tiff = tiff_open_stream(pIStream, "r");
+    if (!tiff)
+    {
+        hr = E_FAIL;
+        goto exit;
+    }
+
+    /* make sure that TIFF format is supported */
+    hr = tiff_get_decode_info(tiff, &decode_info);
+    if (hr != S_OK)
+    {
+        pTIFFClose(tiff);
+        goto exit;
+    }
+
+    This->tiff = tiff;
+    This->stream = pIStream;
+    IStream_AddRef(pIStream);
+    This->initialized = TRUE;
+
+exit:
+    LeaveCriticalSection(&This->lock);
+    return hr;
+}
+
+static HRESULT WINAPI TiffDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
+    GUID *pguidContainerFormat)
+{
+    if (!pguidContainerFormat) return E_INVALIDARG;
+
+    memcpy(pguidContainerFormat, &GUID_ContainerFormatTiff, sizeof(GUID));
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
+    IWICBitmapDecoderInfo **ppIDecoderInfo)
+{
+    HRESULT hr;
+    IWICComponentInfo *compinfo;
+
+    TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
+
+    hr = CreateComponentInfo(&CLSID_WICTiffDecoder, &compinfo);
+    if (FAILED(hr)) return hr;
+
+    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
+        (void**)ppIDecoderInfo);
+
+    IWICComponentInfo_Release(compinfo);
+
+    return hr;
+}
+
+static HRESULT WINAPI TiffDecoder_CopyPalette(IWICBitmapDecoder *iface,
+    IWICPalette *palette)
+{
+    TRACE("(%p,%p)\n", iface, palette);
+    return WINCODEC_ERR_PALETTEUNAVAILABLE;
+}
+
+static HRESULT WINAPI TiffDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
+    IWICMetadataQueryReader **ppIMetadataQueryReader)
+{
+    TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
+
+    if (!ppIMetadataQueryReader) return E_INVALIDARG;
+
+    *ppIMetadataQueryReader = NULL;
+    return WINCODEC_ERR_UNSUPPORTEDOPERATION;
+}
+
+static HRESULT WINAPI TiffDecoder_GetPreview(IWICBitmapDecoder *iface,
+    IWICBitmapSource **ppIBitmapSource)
+{
+    TRACE("(%p,%p)\n", iface, ppIBitmapSource);
+
+    if (!ppIBitmapSource) return E_INVALIDARG;
+
+    *ppIBitmapSource = NULL;
+    return WINCODEC_ERR_UNSUPPORTEDOPERATION;
+}
+
+static HRESULT WINAPI TiffDecoder_GetColorContexts(IWICBitmapDecoder *iface,
+    UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
+{
+    FIXME("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
+    return WINCODEC_ERR_UNSUPPORTEDOPERATION;
+}
+
+static HRESULT WINAPI TiffDecoder_GetThumbnail(IWICBitmapDecoder *iface,
+    IWICBitmapSource **ppIThumbnail)
+{
+    TRACE("(%p,%p)\n", iface, ppIThumbnail);
+
+    if (!ppIThumbnail) return E_INVALIDARG;
+
+    *ppIThumbnail = NULL;
+    return WINCODEC_ERR_CODECNOTHUMBNAIL;
+}
+
+static HRESULT WINAPI TiffDecoder_GetFrameCount(IWICBitmapDecoder *iface,
+    UINT *pCount)
+{
+    TiffDecoder *This = impl_from_IWICBitmapDecoder(iface);
+
+    if (!pCount) return E_INVALIDARG;
+
+    EnterCriticalSection(&This->lock);
+    *pCount = This->tiff ? pTIFFNumberOfDirectories(This->tiff) : 0;
+    LeaveCriticalSection(&This->lock);
+
+    TRACE("(%p) <-- %i\n", iface, *pCount);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffDecoder_GetFrame(IWICBitmapDecoder *iface,
+    UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
+{
+    TiffDecoder *This = impl_from_IWICBitmapDecoder(iface);
+    TiffFrameDecode *result;
+    int res;
+    tiff_decode_info decode_info;
+    HRESULT hr;
+
+    TRACE("(%p,%u,%p)\n", iface, index, ppIBitmapFrame);
+
+    if (!This->tiff)
+        return WINCODEC_ERR_FRAMEMISSING;
+
+    EnterCriticalSection(&This->lock);
+    res = pTIFFSetDirectory(This->tiff, index);
+    if (!res) hr = E_INVALIDARG;
+    else hr = tiff_get_decode_info(This->tiff, &decode_info);
+    LeaveCriticalSection(&This->lock);
+
+    if (SUCCEEDED(hr))
+    {
+        result = HeapAlloc(GetProcessHeap(), 0, sizeof(TiffFrameDecode));
+
+        if (result)
+        {
+            result->IWICBitmapFrameDecode_iface.lpVtbl = &TiffFrameDecode_Vtbl;
+            result->IWICMetadataBlockReader_iface.lpVtbl = &TiffFrameDecode_BlockVtbl;
+            result->ref = 1;
+            result->parent = This;
+            result->index = index;
+            result->decode_info = decode_info;
+            result->cached_tile_x = -1;
+            result->cached_tile = HeapAlloc(GetProcessHeap(), 0, decode_info.tile_size);
+
+            if (result->cached_tile)
+                *ppIBitmapFrame = &result->IWICBitmapFrameDecode_iface;
+            else
+            {
+                hr = E_OUTOFMEMORY;
+                HeapFree(GetProcessHeap(), 0, result);
+            }
+        }
+        else hr = E_OUTOFMEMORY;
+    }
+
+    if (FAILED(hr)) *ppIBitmapFrame = NULL;
+
+    return hr;
+}
+
+static const IWICBitmapDecoderVtbl TiffDecoder_Vtbl = {
+    TiffDecoder_QueryInterface,
+    TiffDecoder_AddRef,
+    TiffDecoder_Release,
+    TiffDecoder_QueryCapability,
+    TiffDecoder_Initialize,
+    TiffDecoder_GetContainerFormat,
+    TiffDecoder_GetDecoderInfo,
+    TiffDecoder_CopyPalette,
+    TiffDecoder_GetMetadataQueryReader,
+    TiffDecoder_GetPreview,
+    TiffDecoder_GetColorContexts,
+    TiffDecoder_GetThumbnail,
+    TiffDecoder_GetFrameCount,
+    TiffDecoder_GetFrame
+};
+
+static HRESULT WINAPI TiffFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
+    void **ppv)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+    TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
+
+    if (!ppv) return E_INVALIDARG;
+
+    if (IsEqualIID(&IID_IUnknown, iid) ||
+        IsEqualIID(&IID_IWICBitmapSource, iid) ||
+        IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
+    {
+        *ppv = &This->IWICBitmapFrameDecode_iface;
+    }
+    else if (IsEqualIID(&IID_IWICMetadataBlockReader, iid))
+    {
+        *ppv = &This->IWICMetadataBlockReader_iface;
+    }
+    else
+    {
+        *ppv = NULL;
+        return E_NOINTERFACE;
+    }
+
+    IUnknown_AddRef((IUnknown*)*ppv);
+    return S_OK;
+}
+
+static ULONG WINAPI TiffFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+    ULONG ref = InterlockedIncrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    return ref;
+}
+
+static ULONG WINAPI TiffFrameDecode_Release(IWICBitmapFrameDecode *iface)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+    ULONG ref = InterlockedDecrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    if (ref == 0)
+    {
+        HeapFree(GetProcessHeap(), 0, This->cached_tile);
+        HeapFree(GetProcessHeap(), 0, This);
+    }
+
+    return ref;
+}
+
+static HRESULT WINAPI TiffFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
+    UINT *puiWidth, UINT *puiHeight)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+
+    *puiWidth = This->decode_info.width;
+    *puiHeight = This->decode_info.height;
+
+    TRACE("(%p) <-- %ux%u\n", iface, *puiWidth, *puiHeight);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameDecode_GetPixelFormat(IWICBitmapFrameDecode *iface,
+    WICPixelFormatGUID *pPixelFormat)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+
+    memcpy(pPixelFormat, This->decode_info.format, sizeof(GUID));
+
+    TRACE("(%p) <-- %s\n", This, debugstr_guid(This->decode_info.format));
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameDecode_GetResolution(IWICBitmapFrameDecode *iface,
+    double *pDpiX, double *pDpiY)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+
+    switch (This->decode_info.resolution_unit)
+    {
+    default:
+        FIXME("unknown resolution unit %i\n", This->decode_info.resolution_unit);
+        /* fall through */
+    case 0: /* Not set */
+        *pDpiX = *pDpiY = 96.0;
+        break;
+    case 1: /* Relative measurements */
+        *pDpiX = 96.0;
+        *pDpiY = 96.0 * This->decode_info.yres / This->decode_info.xres;
+        break;
+    case 2: /* Inch */
+        *pDpiX = This->decode_info.xres;
+        *pDpiY = This->decode_info.yres;
+        break;
+    case 3: /* Centimeter */
+        *pDpiX = This->decode_info.xres / 2.54;
+        *pDpiY = This->decode_info.yres / 2.54;
+        break;
+    }
+
+    TRACE("(%p) <-- %f,%f unit=%i\n", iface, *pDpiX, *pDpiY, This->decode_info.resolution_unit);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
+    IWICPalette *pIPalette)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+    uint16 *red, *green, *blue;
+    WICColor colors[256];
+    int color_count, ret, i;
+
+    TRACE("(%p,%p)\n", iface, pIPalette);
+
+    color_count = 1<<This->decode_info.bps;
+
+    EnterCriticalSection(&This->parent->lock);
+    ret = pTIFFGetField(This->parent->tiff, TIFFTAG_COLORMAP, &red, &green, &blue);
+    LeaveCriticalSection(&This->parent->lock);
+
+    if (!ret)
+    {
+        WARN("Couldn't read color map\n");
+        return WINCODEC_ERR_PALETTEUNAVAILABLE;
+    }
+
+    for (i=0; i<color_count; i++)
+    {
+        colors[i] = 0xff000000 |
+            ((red[i]<<8) & 0xff0000) |
+            (green[i] & 0xff00) |
+            ((blue[i]>>8) & 0xff);
+    }
+
+    return IWICPalette_InitializeCustom(pIPalette, colors, color_count);
+}
+
+static HRESULT TiffFrameDecode_ReadTile(TiffFrameDecode *This, UINT tile_x, UINT tile_y)
+{
+    tsize_t ret;
+    int swap_bytes;
+
+    swap_bytes = pTIFFIsByteSwapped(This->parent->tiff);
+
+    ret = pTIFFSetDirectory(This->parent->tiff, This->index);
+    if (ret == -1)
+        return E_FAIL;
+
+    if (This->decode_info.tiled)
+        ret = pTIFFReadEncodedTile(This->parent->tiff, tile_x + tile_y * This->decode_info.tiles_across, This->cached_tile, This->decode_info.tile_size);
+    else
+        ret = pTIFFReadEncodedStrip(This->parent->tiff, tile_y, This->cached_tile, This->decode_info.tile_size);
+
+    if (ret == -1)
+        return E_FAIL;
+
+    /* 3bpp RGB */
+    if (This->decode_info.source_bpp == 3 && This->decode_info.samples == 3 && This->decode_info.bpp == 24)
+    {
+        BYTE *srcdata, *src, *dst;
+        DWORD x, y, count, width_bytes = (This->decode_info.tile_width * 3 + 7) / 8;
+
+        count = width_bytes * This->decode_info.tile_height;
+
+        srcdata = HeapAlloc(GetProcessHeap(), 0, count);
+        if (!srcdata) return E_OUTOFMEMORY;
+        memcpy(srcdata, This->cached_tile, count);
+
+        for (y = 0; y < This->decode_info.tile_height; y++)
+        {
+            src = srcdata + y * width_bytes;
+            dst = This->cached_tile + y * This->decode_info.tile_width * 3;
+
+            for (x = 0; x < This->decode_info.tile_width; x += 8)
+            {
+                dst[2] = (src[0] & 0x80) ? 0xff : 0; /* R */
+                dst[1] = (src[0] & 0x40) ? 0xff : 0; /* G */
+                dst[0] = (src[0] & 0x20) ? 0xff : 0; /* B */
+                if (x + 1 < This->decode_info.tile_width)
+                {
+                    dst[5] = (src[0] & 0x10) ? 0xff : 0; /* R */
+                    dst[4] = (src[0] & 0x08) ? 0xff : 0; /* G */
+                    dst[3] = (src[0] & 0x04) ? 0xff : 0; /* B */
+                }
+                if (x + 2 < This->decode_info.tile_width)
+                {
+                    dst[8] = (src[0] & 0x02) ? 0xff : 0; /* R */
+                    dst[7] = (src[0] & 0x01) ? 0xff : 0; /* G */
+                    dst[6]  = (src[1] & 0x80) ? 0xff : 0; /* B */
+                }
+                if (x + 3 < This->decode_info.tile_width)
+                {
+                    dst[11] = (src[1] & 0x40) ? 0xff : 0; /* R */
+                    dst[10] = (src[1] & 0x20) ? 0xff : 0; /* G */
+                    dst[9]  = (src[1] & 0x10) ? 0xff : 0; /* B */
+                }
+                if (x + 4 < This->decode_info.tile_width)
+                {
+                    dst[14] = (src[1] & 0x08) ? 0xff : 0; /* R */
+                    dst[13] = (src[1] & 0x04) ? 0xff : 0; /* G */
+                    dst[12] = (src[1] & 0x02) ? 0xff : 0; /* B */
+                }
+                if (x + 5 < This->decode_info.tile_width)
+                {
+                    dst[17] = (src[1] & 0x01) ? 0xff : 0; /* R */
+                    dst[16] = (src[2] & 0x80) ? 0xff : 0; /* G */
+                    dst[15] = (src[2] & 0x40) ? 0xff : 0; /* B */
+                }
+                if (x + 6 < This->decode_info.tile_width)
+                {
+                    dst[20] = (src[2] & 0x20) ? 0xff : 0; /* R */
+                    dst[19] = (src[2] & 0x10) ? 0xff : 0; /* G */
+                    dst[18] = (src[2] & 0x08) ? 0xff : 0; /* B */
+                }
+                if (x + 7 < This->decode_info.tile_width)
+                {
+                    dst[23] = (src[2] & 0x04) ? 0xff : 0; /* R */
+                    dst[22] = (src[2] & 0x02) ? 0xff : 0; /* G */
+                    dst[21] = (src[2] & 0x01) ? 0xff : 0; /* B */
+                }
+                src += 3;
+                dst += 24;
+            }
+        }
+
+        HeapFree(GetProcessHeap(), 0, srcdata);
+    }
+    /* 12bpp RGB */
+    else if (This->decode_info.source_bpp == 12 && This->decode_info.samples == 3 && This->decode_info.bpp == 24)
+    {
+        BYTE *srcdata, *src, *dst;
+        DWORD x, y, count, width_bytes = (This->decode_info.tile_width * 12 + 7) / 8;
+
+        count = width_bytes * This->decode_info.tile_height;
+
+        srcdata = HeapAlloc(GetProcessHeap(), 0, count);
+        if (!srcdata) return E_OUTOFMEMORY;
+        memcpy(srcdata, This->cached_tile, count);
+
+        for (y = 0; y < This->decode_info.tile_height; y++)
+        {
+            src = srcdata + y * width_bytes;
+            dst = This->cached_tile + y * This->decode_info.tile_width * 3;
+
+            for (x = 0; x < This->decode_info.tile_width; x += 2)
+            {
+                dst[0] = ((src[1] & 0xf0) >> 4) * 17; /* B */
+                dst[1] = (src[0] & 0x0f) * 17; /* G */
+                dst[2] = ((src[0] & 0xf0) >> 4) * 17; /* R */
+                if (x + 1 < This->decode_info.tile_width)
+                {
+                    dst[5] = (src[1] & 0x0f) * 17; /* B */
+                    dst[4] = ((src[2] & 0xf0) >> 4) * 17; /* G */
+                    dst[3] = (src[2] & 0x0f) * 17; /* R */
+                }
+                src += 3;
+                dst += 6;
+            }
+        }
+
+        HeapFree(GetProcessHeap(), 0, srcdata);
+    }
+    /* 4bpp RGBA */
+    else if (This->decode_info.source_bpp == 4 && This->decode_info.samples == 4 && This->decode_info.bpp == 32)
+    {
+        BYTE *src, *dst;
+        DWORD count;
+
+        /* 1 source byte expands to 2 BGRA samples */
+        count = (This->decode_info.tile_width * This->decode_info.tile_height + 1) / 2;
+
+        src = This->cached_tile + count - 1;
+        dst = This->cached_tile + This->decode_info.tile_size;
+
+        while (count--)
+        {
+            BYTE b = *src--;
+
+            dst -= 8;
+            dst[2] = (b & 0x80) ? 0xff : 0; /* R */
+            dst[1] = (b & 0x40) ? 0xff : 0; /* G */
+            dst[0] = (b & 0x20) ? 0xff : 0; /* B */
+            dst[3] = (b & 0x10) ? 0xff : 0; /* A */
+            dst[6] = (b & 0x08) ? 0xff : 0; /* R */
+            dst[5] = (b & 0x04) ? 0xff : 0; /* G */
+            dst[4] = (b & 0x02) ? 0xff : 0; /* B */
+            dst[7] = (b & 0x01) ? 0xff : 0; /* A */
+        }
+    }
+    /* 16bpp RGBA */
+    else if (This->decode_info.source_bpp == 16 && This->decode_info.samples == 4 && This->decode_info.bpp == 32)
+    {
+        BYTE *src, *dst;
+        DWORD count = This->decode_info.tile_width * This->decode_info.tile_height;
+
+        src = This->cached_tile + count * 2;
+        dst = This->cached_tile + This->decode_info.tile_size;
+
+        while (count--)
+        {
+            BYTE b[2];
+
+            src -= 2;
+            dst -= 4;
+
+            b[0] = src[0];
+            b[1] = src[1];
+
+            dst[0] = ((b[1] & 0xf0) >> 4) * 17; /* B */
+            dst[1] = (b[0] & 0x0f) * 17; /* G */
+            dst[2] = ((b[0] & 0xf0) >> 4) * 17; /* R */
+            dst[3] = (b[1] & 0x0f) * 17; /* A */
+        }
+    }
+    /* 8bpp grayscale with extra alpha */
+    else if (This->decode_info.source_bpp == 16 && This->decode_info.samples == 2 && This->decode_info.bpp == 32)
+    {
+        BYTE *src;
+        DWORD *dst, count = This->decode_info.tile_width * This->decode_info.tile_height;
+
+        src = This->cached_tile + This->decode_info.tile_width * This->decode_info.tile_height * 2 - 2;
+        dst = (DWORD *)(This->cached_tile + This->decode_info.tile_size - 4);
+
+        while (count--)
+        {
+            *dst-- = src[0] | (src[0] << 8) | (src[0] << 16) | (src[1] << 24);
+            src -= 2;
+        }
+    }
+
+    if (This->decode_info.reverse_bgr)
+    {
+        if (This->decode_info.bps == 8)
+        {
+            UINT sample_count = This->decode_info.samples;
+
+            reverse_bgr8(sample_count, This->cached_tile, This->decode_info.tile_width,
+                This->decode_info.tile_height, This->decode_info.tile_width * sample_count);
+        }
+    }
+
+    if (swap_bytes && This->decode_info.bps > 8)
+    {
+        UINT row, i, samples_per_row;
+        BYTE *sample, temp;
+
+        samples_per_row = This->decode_info.tile_width * This->decode_info.samples;
+
+        switch(This->decode_info.bps)
+        {
+        case 16:
+            for (row=0; row<This->decode_info.tile_height; row++)
+            {
+                sample = This->cached_tile + row * This->decode_info.tile_stride;
+                for (i=0; i<samples_per_row; i++)
+                {
+                    temp = sample[1];
+                    sample[1] = sample[0];
+                    sample[0] = temp;
+                    sample += 2;
+                }
+            }
+            break;
+        default:
+            ERR("unhandled bps for byte swap %u\n", This->decode_info.bps);
+            return E_FAIL;
+        }
+    }
+
+    if (This->decode_info.invert_grayscale)
+    {
+        BYTE *byte, *end;
+
+        if (This->decode_info.samples != 1)
+        {
+            ERR("cannot invert grayscale image with %u samples\n", This->decode_info.samples);
+            return E_FAIL;
+        }
+
+        end = This->cached_tile+This->decode_info.tile_size;
+
+        for (byte = This->cached_tile; byte != end; byte++)
+            *byte = ~(*byte);
+    }
+
+    This->cached_tile_x = tile_x;
+    This->cached_tile_y = tile_y;
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
+    const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+    UINT min_tile_x, max_tile_x, min_tile_y, max_tile_y;
+    UINT tile_x, tile_y;
+    WICRect rc;
+    HRESULT hr=S_OK;
+    BYTE *dst_tilepos;
+    UINT bytesperrow;
+    WICRect rect;
+
+    TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
+
+    if (!prc)
+    {
+        rect.X = 0;
+        rect.Y = 0;
+        rect.Width = This->decode_info.width;
+        rect.Height = This->decode_info.height;
+        prc = &rect;
+    }
+    else
+    {
+        if (prc->X < 0 || prc->Y < 0 || prc->X+prc->Width > This->decode_info.width ||
+            prc->Y+prc->Height > This->decode_info.height)
+            return E_INVALIDARG;
+    }
+
+    bytesperrow = ((This->decode_info.bpp * prc->Width)+7)/8;
+
+    if (cbStride < bytesperrow)
+        return E_INVALIDARG;
+
+    if ((cbStride * (prc->Height-1)) + ((prc->Width * This->decode_info.bpp) + 7)/8 > cbBufferSize)
+        return E_INVALIDARG;
+
+    min_tile_x = prc->X / This->decode_info.tile_width;
+    min_tile_y = prc->Y / This->decode_info.tile_height;
+    max_tile_x = (prc->X+prc->Width-1) / This->decode_info.tile_width;
+    max_tile_y = (prc->Y+prc->Height-1) / This->decode_info.tile_height;
+
+    EnterCriticalSection(&This->parent->lock);
+
+    for (tile_x=min_tile_x; tile_x <= max_tile_x; tile_x++)
+    {
+        for (tile_y=min_tile_y; tile_y <= max_tile_y; tile_y++)
+        {
+            if (tile_x != This->cached_tile_x || tile_y != This->cached_tile_y)
+            {
+                hr = TiffFrameDecode_ReadTile(This, tile_x, tile_y);
+            }
+
+            if (SUCCEEDED(hr))
+            {
+                if (prc->X < tile_x * This->decode_info.tile_width)
+                    rc.X = 0;
+                else
+                    rc.X = prc->X - tile_x * This->decode_info.tile_width;
+
+                if (prc->Y < tile_y * This->decode_info.tile_height)
+                    rc.Y = 0;
+                else
+                    rc.Y = prc->Y - tile_y * This->decode_info.tile_height;
+
+                if (prc->X+prc->Width > (tile_x+1) * This->decode_info.tile_width)
+                    rc.Width = This->decode_info.tile_width - rc.X;
+                else if (prc->X < tile_x * This->decode_info.tile_width)
+                    rc.Width = prc->Width + prc->X - tile_x * This->decode_info.tile_width;
+                else
+                    rc.Width = prc->Width;
+
+                if (prc->Y+prc->Height > (tile_y+1) * This->decode_info.tile_height)
+                    rc.Height = This->decode_info.tile_height - rc.Y;
+                else if (prc->Y < tile_y * This->decode_info.tile_height)
+                    rc.Height = prc->Height + prc->Y - tile_y * This->decode_info.tile_height;
+                else
+                    rc.Height = prc->Height;
+
+                dst_tilepos = pbBuffer + (cbStride * ((rc.Y + tile_y * This->decode_info.tile_height) - prc->Y)) +
+                    ((This->decode_info.bpp * ((rc.X + tile_x * This->decode_info.tile_width) - prc->X) + 7) / 8);
+
+                hr = copy_pixels(This->decode_info.bpp, This->cached_tile,
+                    This->decode_info.tile_width, This->decode_info.tile_height, This->decode_info.tile_stride,
+                    &rc, cbStride, cbBufferSize, dst_tilepos);
+            }
+
+            if (FAILED(hr))
+            {
+                LeaveCriticalSection(&This->parent->lock);
+                TRACE("<-- 0x%x\n", hr);
+                return hr;
+            }
+        }
+    }
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameDecode_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
+    IWICMetadataQueryReader **ppIMetadataQueryReader)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+
+    TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
+
+    if (!ppIMetadataQueryReader)
+        return E_INVALIDARG;
+
+    return MetadataQueryReader_CreateInstance(&This->IWICMetadataBlockReader_iface, NULL, ppIMetadataQueryReader);
+}
+
+static HRESULT WINAPI TiffFrameDecode_GetColorContexts(IWICBitmapFrameDecode *iface,
+    UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
+{
+    TiffFrameDecode *This = impl_from_IWICBitmapFrameDecode(iface);
+    const BYTE *profile;
+    UINT len;
+    HRESULT hr;
+
+    TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
+
+    EnterCriticalSection(&This->parent->lock);
+
+    if (pTIFFGetField(This->parent->tiff, TIFFTAG_ICCPROFILE, &len, &profile))
+    {
+        if (cCount && ppIColorContexts)
+        {
+            hr = IWICColorContext_InitializeFromMemory(*ppIColorContexts, profile, len);
+            if (FAILED(hr))
+            {
+                LeaveCriticalSection(&This->parent->lock);
+                return hr;
+            }
+        }
+        *pcActualCount = 1;
+    }
+    else
+        *pcActualCount = 0;
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameDecode_GetThumbnail(IWICBitmapFrameDecode *iface,
+    IWICBitmapSource **ppIThumbnail)
+{
+    TRACE("(%p,%p)\n", iface, ppIThumbnail);
+
+    if (!ppIThumbnail) return E_INVALIDARG;
+
+    *ppIThumbnail = NULL;
+    return WINCODEC_ERR_CODECNOTHUMBNAIL;
+}
+
+static const IWICBitmapFrameDecodeVtbl TiffFrameDecode_Vtbl = {
+    TiffFrameDecode_QueryInterface,
+    TiffFrameDecode_AddRef,
+    TiffFrameDecode_Release,
+    TiffFrameDecode_GetSize,
+    TiffFrameDecode_GetPixelFormat,
+    TiffFrameDecode_GetResolution,
+    TiffFrameDecode_CopyPalette,
+    TiffFrameDecode_CopyPixels,
+    TiffFrameDecode_GetMetadataQueryReader,
+    TiffFrameDecode_GetColorContexts,
+    TiffFrameDecode_GetThumbnail
+};
+
+static HRESULT WINAPI TiffFrameDecode_Block_QueryInterface(IWICMetadataBlockReader *iface,
+    REFIID iid, void **ppv)
+{
+    TiffFrameDecode *This = impl_from_IWICMetadataBlockReader(iface);
+    return IWICBitmapFrameDecode_QueryInterface(&This->IWICBitmapFrameDecode_iface, iid, ppv);
+}
+
+static ULONG WINAPI TiffFrameDecode_Block_AddRef(IWICMetadataBlockReader *iface)
+{
+    TiffFrameDecode *This = impl_from_IWICMetadataBlockReader(iface);
+    return IWICBitmapFrameDecode_AddRef(&This->IWICBitmapFrameDecode_iface);
+}
+
+static ULONG WINAPI TiffFrameDecode_Block_Release(IWICMetadataBlockReader *iface)
+{
+    TiffFrameDecode *This = impl_from_IWICMetadataBlockReader(iface);
+    return IWICBitmapFrameDecode_Release(&This->IWICBitmapFrameDecode_iface);
+}
+
+static HRESULT WINAPI TiffFrameDecode_Block_GetContainerFormat(IWICMetadataBlockReader *iface,
+    GUID *guid)
+{
+    TRACE("(%p,%p)\n", iface, guid);
+
+    if (!guid) return E_INVALIDARG;
+
+    *guid = GUID_ContainerFormatTiff;
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameDecode_Block_GetCount(IWICMetadataBlockReader *iface,
+    UINT *count)
+{
+    TRACE("%p,%p\n", iface, count);
+
+    if (!count) return E_INVALIDARG;
+
+    *count = 1;
+    return S_OK;
+}
+
+static HRESULT create_metadata_reader(TiffFrameDecode *This, IWICMetadataReader **reader)
+{
+    HRESULT hr;
+    LARGE_INTEGER dir_offset;
+    IWICMetadataReader *metadata_reader;
+    IWICPersistStream *persist;
+
+    /* FIXME: Use IWICComponentFactory_CreateMetadataReader once it's implemented */
+
+    hr = IfdMetadataReader_CreateInstance(&IID_IWICMetadataReader, (void **)&metadata_reader);
+    if (FAILED(hr)) return hr;
+
+    hr = IWICMetadataReader_QueryInterface(metadata_reader, &IID_IWICPersistStream, (void **)&persist);
+    if (FAILED(hr))
+    {
+        IWICMetadataReader_Release(metadata_reader);
+        return hr;
+    }
+
+    EnterCriticalSection(&This->parent->lock);
+
+    dir_offset.QuadPart = pTIFFCurrentDirOffset(This->parent->tiff);
+    hr = IStream_Seek(This->parent->stream, dir_offset, STREAM_SEEK_SET, NULL);
+    if (SUCCEEDED(hr))
+    {
+        BOOL byte_swapped = pTIFFIsByteSwapped(This->parent->tiff);
+#ifdef WORDS_BIGENDIAN
+        DWORD persist_options = byte_swapped ? WICPersistOptionLittleEndian : WICPersistOptionBigEndian;
+#else
+        DWORD persist_options = byte_swapped ? WICPersistOptionBigEndian : WICPersistOptionLittleEndian;
+#endif
+        persist_options |= WICPersistOptionNoCacheStream;
+        hr = IWICPersistStream_LoadEx(persist, This->parent->stream, NULL, persist_options);
+        if (FAILED(hr))
+            ERR("IWICPersistStream_LoadEx error %#x\n", hr);
+    }
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    IWICPersistStream_Release(persist);
+
+    if (FAILED(hr))
+    {
+        IWICMetadataReader_Release(metadata_reader);
+        return hr;
+    }
+
+    *reader = metadata_reader;
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameDecode_Block_GetReaderByIndex(IWICMetadataBlockReader *iface,
+    UINT index, IWICMetadataReader **reader)
+{
+    TiffFrameDecode *This = impl_from_IWICMetadataBlockReader(iface);
+
+    TRACE("(%p,%u,%p)\n", iface, index, reader);
+
+    if (!reader || index != 0) return E_INVALIDARG;
+
+    return create_metadata_reader(This, reader);
+}
+
+static HRESULT WINAPI TiffFrameDecode_Block_GetEnumerator(IWICMetadataBlockReader *iface,
+    IEnumUnknown **enum_metadata)
+{
+    FIXME("(%p,%p): stub\n", iface, enum_metadata);
+    return E_NOTIMPL;
+}
+
+static const IWICMetadataBlockReaderVtbl TiffFrameDecode_BlockVtbl =
+{
+    TiffFrameDecode_Block_QueryInterface,
+    TiffFrameDecode_Block_AddRef,
+    TiffFrameDecode_Block_Release,
+    TiffFrameDecode_Block_GetContainerFormat,
+    TiffFrameDecode_Block_GetCount,
+    TiffFrameDecode_Block_GetReaderByIndex,
+    TiffFrameDecode_Block_GetEnumerator
+};
+
+HRESULT TiffDecoder_CreateInstance(REFIID iid, void** ppv)
+{
+    HRESULT ret;
+    TiffDecoder *This;
+
+    TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
+
+    *ppv = NULL;
+
+    if (!load_libtiff())
+    {
+        ERR("Failed reading TIFF because unable to load %s\n",SONAME_LIBTIFF);
+        return E_FAIL;
+    }
+
+    This = HeapAlloc(GetProcessHeap(), 0, sizeof(TiffDecoder));
+    if (!This) return E_OUTOFMEMORY;
+
+    This->IWICBitmapDecoder_iface.lpVtbl = &TiffDecoder_Vtbl;
+    This->ref = 1;
+    This->stream = NULL;
+    InitializeCriticalSection(&This->lock);
+    This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": TiffDecoder.lock");
+    This->tiff = NULL;
+    This->initialized = FALSE;
+
+    ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
+    IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
+
+    return ret;
+}
+
+struct tiff_encode_format {
+    const WICPixelFormatGUID *guid;
+    int photometric;
+    int bps;
+    int samples;
+    int bpp;
+    int extra_sample;
+    int extra_sample_type;
+    int reverse_bgr;
+};
+
+static const struct tiff_encode_format formats[] = {
+    {&GUID_WICPixelFormat24bppBGR, 2, 8, 3, 24, 0, 0, 1},
+    {&GUID_WICPixelFormat24bppRGB, 2, 8, 3, 24, 0, 0, 0},
+    {&GUID_WICPixelFormatBlackWhite, 1, 1, 1, 1, 0, 0, 0},
+    {&GUID_WICPixelFormat4bppGray, 1, 4, 1, 4, 0, 0, 0},
+    {&GUID_WICPixelFormat8bppGray, 1, 8, 1, 8, 0, 0, 0},
+    {&GUID_WICPixelFormat32bppBGRA, 2, 8, 4, 32, 1, 2, 1},
+    {&GUID_WICPixelFormat32bppPBGRA, 2, 8, 4, 32, 1, 1, 1},
+    {&GUID_WICPixelFormat48bppRGB, 2, 16, 3, 48, 0, 0, 0},
+    {&GUID_WICPixelFormat64bppRGBA, 2, 16, 4, 64, 1, 2, 0},
+    {&GUID_WICPixelFormat64bppPRGBA, 2, 16, 4, 64, 1, 1, 0},
+    {&GUID_WICPixelFormat1bppIndexed, 3, 1, 1, 1, 0, 0, 0},
+    {&GUID_WICPixelFormat2bppIndexed, 3, 2, 1, 2, 0, 0, 0},
+    {&GUID_WICPixelFormat4bppIndexed, 3, 4, 1, 4, 0, 0, 0},
+    {&GUID_WICPixelFormat8bppIndexed, 3, 8, 1, 8, 0, 0, 0},
+    {0}
+};
+
+typedef struct TiffEncoder {
+    IWICBitmapEncoder IWICBitmapEncoder_iface;
+    LONG ref;
+    IStream *stream;
+    CRITICAL_SECTION lock; /* Must be held when tiff is used or fields below are set */
+    TIFF *tiff;
+    BOOL initialized;
+    BOOL committed;
+    ULONG num_frames;
+    ULONG num_frames_committed;
+} TiffEncoder;
+
+static inline TiffEncoder *impl_from_IWICBitmapEncoder(IWICBitmapEncoder *iface)
+{
+    return CONTAINING_RECORD(iface, TiffEncoder, IWICBitmapEncoder_iface);
+}
+
+typedef struct TiffFrameEncode {
+    IWICBitmapFrameEncode IWICBitmapFrameEncode_iface;
+    LONG ref;
+    TiffEncoder *parent;
+    /* fields below are protected by parent->lock */
+    BOOL initialized;
+    BOOL info_written;
+    BOOL committed;
+    const struct tiff_encode_format *format;
+    UINT width, height;
+    double xres, yres;
+    UINT lines_written;
+    WICColor palette[256];
+    UINT colors;
+} TiffFrameEncode;
+
+static inline TiffFrameEncode *impl_from_IWICBitmapFrameEncode(IWICBitmapFrameEncode *iface)
+{
+    return CONTAINING_RECORD(iface, TiffFrameEncode, IWICBitmapFrameEncode_iface);
+}
+
+static HRESULT WINAPI TiffFrameEncode_QueryInterface(IWICBitmapFrameEncode *iface, REFIID iid,
+    void **ppv)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
+
+    if (!ppv) return E_INVALIDARG;
+
+    if (IsEqualIID(&IID_IUnknown, iid) ||
+        IsEqualIID(&IID_IWICBitmapFrameEncode, iid))
+    {
+        *ppv = &This->IWICBitmapFrameEncode_iface;
+    }
+    else
+    {
+        *ppv = NULL;
+        return E_NOINTERFACE;
+    }
+
+    IUnknown_AddRef((IUnknown*)*ppv);
+    return S_OK;
+}
+
+static ULONG WINAPI TiffFrameEncode_AddRef(IWICBitmapFrameEncode *iface)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    ULONG ref = InterlockedIncrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    return ref;
+}
+
+static ULONG WINAPI TiffFrameEncode_Release(IWICBitmapFrameEncode *iface)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    ULONG ref = InterlockedDecrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    if (ref == 0)
+    {
+        IWICBitmapEncoder_Release(&This->parent->IWICBitmapEncoder_iface);
+        HeapFree(GetProcessHeap(), 0, This);
+    }
+
+    return ref;
+}
+
+static HRESULT WINAPI TiffFrameEncode_Initialize(IWICBitmapFrameEncode *iface,
+    IPropertyBag2 *pIEncoderOptions)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    TRACE("(%p,%p)\n", iface, pIEncoderOptions);
+
+    EnterCriticalSection(&This->parent->lock);
+
+    if (This->initialized)
+    {
+        LeaveCriticalSection(&This->parent->lock);
+        return WINCODEC_ERR_WRONGSTATE;
+    }
+
+    This->initialized = TRUE;
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameEncode_SetSize(IWICBitmapFrameEncode *iface,
+    UINT uiWidth, UINT uiHeight)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    TRACE("(%p,%u,%u)\n", iface, uiWidth, uiHeight);
+
+    EnterCriticalSection(&This->parent->lock);
+
+    if (!This->initialized || This->info_written)
+    {
+        LeaveCriticalSection(&This->parent->lock);
+        return WINCODEC_ERR_WRONGSTATE;
+    }
+
+    This->width = uiWidth;
+    This->height = uiHeight;
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameEncode_SetResolution(IWICBitmapFrameEncode *iface,
+    double dpiX, double dpiY)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    TRACE("(%p,%0.2f,%0.2f)\n", iface, dpiX, dpiY);
+
+    EnterCriticalSection(&This->parent->lock);
+
+    if (!This->initialized || This->info_written)
+    {
+        LeaveCriticalSection(&This->parent->lock);
+        return WINCODEC_ERR_WRONGSTATE;
+    }
+
+    This->xres = dpiX;
+    This->yres = dpiY;
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameEncode_SetPixelFormat(IWICBitmapFrameEncode *iface,
+    WICPixelFormatGUID *pPixelFormat)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    int i;
+
+    TRACE("(%p,%s)\n", iface, debugstr_guid(pPixelFormat));
+
+    EnterCriticalSection(&This->parent->lock);
+
+    if (!This->initialized || This->info_written)
+    {
+        LeaveCriticalSection(&This->parent->lock);
+        return WINCODEC_ERR_WRONGSTATE;
+    }
+
+    for (i=0; formats[i].guid; i++)
+    {
+        if (memcmp(formats[i].guid, pPixelFormat, sizeof(GUID)) == 0)
+            break;
+    }
+
+    if (!formats[i].guid) i = 0;
+
+    This->format = &formats[i];
+    memcpy(pPixelFormat, This->format->guid, sizeof(GUID));
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameEncode_SetColorContexts(IWICBitmapFrameEncode *iface,
+    UINT cCount, IWICColorContext **ppIColorContext)
+{
+    FIXME("(%p,%u,%p): stub\n", iface, cCount, ppIColorContext);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI TiffFrameEncode_SetPalette(IWICBitmapFrameEncode *iface,
+    IWICPalette *palette)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    HRESULT hr;
+
+    TRACE("(%p,%p)\n", iface, palette);
+
+    if (!palette) return E_INVALIDARG;
+
+    EnterCriticalSection(&This->parent->lock);
+
+    if (This->initialized)
+        hr = IWICPalette_GetColors(palette, 256, This->palette, &This->colors);
+    else
+        hr = WINCODEC_ERR_NOTINITIALIZED;
+
+    LeaveCriticalSection(&This->parent->lock);
+    return hr;
+}
+
+static HRESULT WINAPI TiffFrameEncode_SetThumbnail(IWICBitmapFrameEncode *iface,
+    IWICBitmapSource *pIThumbnail)
+{
+    FIXME("(%p,%p): stub\n", iface, pIThumbnail);
+    return WINCODEC_ERR_UNSUPPORTEDOPERATION;
+}
+
+static HRESULT WINAPI TiffFrameEncode_WritePixels(IWICBitmapFrameEncode *iface,
+    UINT lineCount, UINT cbStride, UINT cbBufferSize, BYTE *pbPixels)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    BYTE *row_data, *swapped_data = NULL;
+    UINT i, j, line_size;
+
+    TRACE("(%p,%u,%u,%u,%p)\n", iface, lineCount, cbStride, cbBufferSize, pbPixels);
+
+    EnterCriticalSection(&This->parent->lock);
+
+    if (!This->initialized || !This->width || !This->height || !This->format)
+    {
+        LeaveCriticalSection(&This->parent->lock);
+        return WINCODEC_ERR_WRONGSTATE;
+    }
+
+    if (lineCount == 0 || lineCount + This->lines_written > This->height)
+    {
+        LeaveCriticalSection(&This->parent->lock);
+        return E_INVALIDARG;
+    }
+
+    line_size = ((This->width * This->format->bpp)+7)/8;
+
+    if (This->format->reverse_bgr)
+    {
+        swapped_data = HeapAlloc(GetProcessHeap(), 0, line_size);
+        if (!swapped_data)
+        {
+            LeaveCriticalSection(&This->parent->lock);
+            return E_OUTOFMEMORY;
+        }
+    }
+
+    if (!This->info_written)
+    {
+        pTIFFSetField(This->parent->tiff, TIFFTAG_PHOTOMETRIC, (uint16)This->format->photometric);
+        pTIFFSetField(This->parent->tiff, TIFFTAG_PLANARCONFIG, (uint16)1);
+        pTIFFSetField(This->parent->tiff, TIFFTAG_BITSPERSAMPLE, (uint16)This->format->bps);
+        pTIFFSetField(This->parent->tiff, TIFFTAG_SAMPLESPERPIXEL, (uint16)This->format->samples);
+
+        if (This->format->extra_sample)
+        {
+            uint16 extra_samples;
+            extra_samples = This->format->extra_sample_type;
+
+            pTIFFSetField(This->parent->tiff, TIFFTAG_EXTRASAMPLES, (uint16)1, &extra_samples);
+        }
+
+        pTIFFSetField(This->parent->tiff, TIFFTAG_IMAGEWIDTH, (uint32)This->width);
+        pTIFFSetField(This->parent->tiff, TIFFTAG_IMAGELENGTH, (uint32)This->height);
+
+        if (This->xres != 0.0 && This->yres != 0.0)
+        {
+            pTIFFSetField(This->parent->tiff, TIFFTAG_RESOLUTIONUNIT, (uint16)2); /* Inch */
+            pTIFFSetField(This->parent->tiff, TIFFTAG_XRESOLUTION, (float)This->xres);
+            pTIFFSetField(This->parent->tiff, TIFFTAG_YRESOLUTION, (float)This->yres);
+        }
+
+        if (This->format->bpp <= 8 && This->colors && !IsEqualGUID(This->format->guid, &GUID_WICPixelFormatBlackWhite))
+        {
+            uint16 red[256], green[256], blue[256];
+            UINT i;
+
+            for (i = 0; i < This->colors; i++)
+            {
+                red[i] = (This->palette[i] >> 8) & 0xff00;
+                green[i] = This->palette[i] & 0xff00;
+                blue[i] = (This->palette[i] << 8) & 0xff00;
+            }
+
+            pTIFFSetField(This->parent->tiff, TIFFTAG_COLORMAP, red, green, blue);
+        }
+
+        This->info_written = TRUE;
+    }
+
+    for (i=0; i<lineCount; i++)
+    {
+        row_data = pbPixels + i * cbStride;
+
+        if (This->format->reverse_bgr && This->format->bps == 8)
+        {
+            memcpy(swapped_data, row_data, line_size);
+            for (j=0; j<line_size; j += This->format->samples)
+            {
+                BYTE temp;
+                temp = swapped_data[j];
+                swapped_data[j] = swapped_data[j+2];
+                swapped_data[j+2] = temp;
+            }
+            row_data = swapped_data;
+        }
+
+        pTIFFWriteScanline(This->parent->tiff, (tdata_t)row_data, i+This->lines_written, 0);
+    }
+
+    This->lines_written += lineCount;
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    HeapFree(GetProcessHeap(), 0, swapped_data);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameEncode_WriteSource(IWICBitmapFrameEncode *iface,
+    IWICBitmapSource *pIBitmapSource, WICRect *prc)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+    HRESULT hr;
+
+    TRACE("(%p,%p,%p)\n", iface, pIBitmapSource, prc);
+
+    if (!This->initialized)
+        return WINCODEC_ERR_WRONGSTATE;
+
+    hr = configure_write_source(iface, pIBitmapSource, prc,
+        This->format ? This->format->guid : NULL, This->width, This->height,
+        This->xres, This->yres);
+
+    if (SUCCEEDED(hr))
+    {
+        hr = write_source(iface, pIBitmapSource, prc,
+            This->format->guid, This->format->bpp, This->width, This->height);
+    }
+
+    return hr;
+}
+
+static HRESULT WINAPI TiffFrameEncode_Commit(IWICBitmapFrameEncode *iface)
+{
+    TiffFrameEncode *This = impl_from_IWICBitmapFrameEncode(iface);
+
+    TRACE("(%p)\n", iface);
+
+    EnterCriticalSection(&This->parent->lock);
+
+    if (!This->info_written || This->lines_written != This->height || This->committed)
+    {
+        LeaveCriticalSection(&This->parent->lock);
+        return WINCODEC_ERR_WRONGSTATE;
+    }
+
+    /* libtiff will commit the data when creating a new frame or closing the file */
+
+    This->committed = TRUE;
+    This->parent->num_frames_committed++;
+
+    LeaveCriticalSection(&This->parent->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffFrameEncode_GetMetadataQueryWriter(IWICBitmapFrameEncode *iface,
+    IWICMetadataQueryWriter **ppIMetadataQueryWriter)
+{
+    FIXME("(%p, %p): stub\n", iface, ppIMetadataQueryWriter);
+    return E_NOTIMPL;
+}
+
+static const IWICBitmapFrameEncodeVtbl TiffFrameEncode_Vtbl = {
+    TiffFrameEncode_QueryInterface,
+    TiffFrameEncode_AddRef,
+    TiffFrameEncode_Release,
+    TiffFrameEncode_Initialize,
+    TiffFrameEncode_SetSize,
+    TiffFrameEncode_SetResolution,
+    TiffFrameEncode_SetPixelFormat,
+    TiffFrameEncode_SetColorContexts,
+    TiffFrameEncode_SetPalette,
+    TiffFrameEncode_SetThumbnail,
+    TiffFrameEncode_WritePixels,
+    TiffFrameEncode_WriteSource,
+    TiffFrameEncode_Commit,
+    TiffFrameEncode_GetMetadataQueryWriter
+};
+
+static HRESULT WINAPI TiffEncoder_QueryInterface(IWICBitmapEncoder *iface, REFIID iid,
+    void **ppv)
+{
+    TiffEncoder *This = impl_from_IWICBitmapEncoder(iface);
+    TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
+
+    if (!ppv) return E_INVALIDARG;
+
+    if (IsEqualIID(&IID_IUnknown, iid) ||
+        IsEqualIID(&IID_IWICBitmapEncoder, iid))
+    {
+        *ppv = &This->IWICBitmapEncoder_iface;
+    }
+    else
+    {
+        *ppv = NULL;
+        return E_NOINTERFACE;
+    }
+
+    IUnknown_AddRef((IUnknown*)*ppv);
+    return S_OK;
+}
+
+static ULONG WINAPI TiffEncoder_AddRef(IWICBitmapEncoder *iface)
+{
+    TiffEncoder *This = impl_from_IWICBitmapEncoder(iface);
+    ULONG ref = InterlockedIncrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    return ref;
+}
+
+static ULONG WINAPI TiffEncoder_Release(IWICBitmapEncoder *iface)
+{
+    TiffEncoder *This = impl_from_IWICBitmapEncoder(iface);
+    ULONG ref = InterlockedDecrement(&This->ref);
+
+    TRACE("(%p) refcount=%u\n", iface, ref);
+
+    if (ref == 0)
+    {
+        if (This->tiff) pTIFFClose(This->tiff);
+        if (This->stream) IStream_Release(This->stream);
+        This->lock.DebugInfo->Spare[0] = 0;
+        DeleteCriticalSection(&This->lock);
+        HeapFree(GetProcessHeap(), 0, This);
+    }
+
+    return ref;
+}
+
+static HRESULT WINAPI TiffEncoder_Initialize(IWICBitmapEncoder *iface,
+    IStream *pIStream, WICBitmapEncoderCacheOption cacheOption)
+{
+    TiffEncoder *This = impl_from_IWICBitmapEncoder(iface);
+    TIFF *tiff;
+    HRESULT hr=S_OK;
+
+    TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOption);
+
+    EnterCriticalSection(&This->lock);
+
+    if (This->initialized || This->committed)
+    {
+        hr = WINCODEC_ERR_WRONGSTATE;
+        goto exit;
+    }
+
+    tiff = tiff_open_stream(pIStream, "w");
+
+    if (!tiff)
+    {
+        hr = E_FAIL;
+        goto exit;
+    }
+
+    This->tiff = tiff;
+    This->stream = pIStream;
+    IStream_AddRef(pIStream);
+    This->initialized = TRUE;
+
+exit:
+    LeaveCriticalSection(&This->lock);
+    return hr;
+}
+
+static HRESULT WINAPI TiffEncoder_GetContainerFormat(IWICBitmapEncoder *iface,
+    GUID *pguidContainerFormat)
+{
+    memcpy(pguidContainerFormat, &GUID_ContainerFormatTiff, sizeof(GUID));
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffEncoder_GetEncoderInfo(IWICBitmapEncoder *iface, IWICBitmapEncoderInfo **info)
+{
+    IWICComponentInfo *comp_info;
+    HRESULT hr;
+
+    TRACE("%p,%p\n", iface, info);
+
+    if (!info) return E_INVALIDARG;
+
+    hr = CreateComponentInfo(&CLSID_WICTiffEncoder, &comp_info);
+    if (hr == S_OK)
+    {
+        hr = IWICComponentInfo_QueryInterface(comp_info, &IID_IWICBitmapEncoderInfo, (void **)info);
+        IWICComponentInfo_Release(comp_info);
+    }
+    return hr;
+}
+
+static HRESULT WINAPI TiffEncoder_SetColorContexts(IWICBitmapEncoder *iface,
+    UINT cCount, IWICColorContext **ppIColorContext)
+{
+    FIXME("(%p,%u,%p): stub\n", iface, cCount, ppIColorContext);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI TiffEncoder_SetPalette(IWICBitmapEncoder *iface, IWICPalette *palette)
+{
+    TiffEncoder *This = impl_from_IWICBitmapEncoder(iface);
+    HRESULT hr;
+
+    TRACE("(%p,%p)\n", iface, palette);
+
+    EnterCriticalSection(&This->lock);
+
+    hr = This->stream ? WINCODEC_ERR_UNSUPPORTEDOPERATION : WINCODEC_ERR_NOTINITIALIZED;
+
+    LeaveCriticalSection(&This->lock);
+
+    return hr;
+}
+
+static HRESULT WINAPI TiffEncoder_SetThumbnail(IWICBitmapEncoder *iface, IWICBitmapSource *pIThumbnail)
+{
+    TRACE("(%p,%p)\n", iface, pIThumbnail);
+    return WINCODEC_ERR_UNSUPPORTEDOPERATION;
+}
+
+static HRESULT WINAPI TiffEncoder_SetPreview(IWICBitmapEncoder *iface, IWICBitmapSource *pIPreview)
+{
+    TRACE("(%p,%p)\n", iface, pIPreview);
+    return WINCODEC_ERR_UNSUPPORTEDOPERATION;
+}
+
+static HRESULT WINAPI TiffEncoder_CreateNewFrame(IWICBitmapEncoder *iface,
+    IWICBitmapFrameEncode **ppIFrameEncode, IPropertyBag2 **ppIEncoderOptions)
+{
+    TiffEncoder *This = impl_from_IWICBitmapEncoder(iface);
+    TiffFrameEncode *result;
+
+    HRESULT hr=S_OK;
+
+    TRACE("(%p,%p,%p)\n", iface, ppIFrameEncode, ppIEncoderOptions);
+
+    EnterCriticalSection(&This->lock);
+
+    if (!This->initialized || This->committed)
+    {
+        hr = WINCODEC_ERR_WRONGSTATE;
+    }
+    else if (This->num_frames != This->num_frames_committed)
+    {
+        FIXME("New frame created before previous frame was committed\n");
+        hr = E_FAIL;
+    }
+
+    if (SUCCEEDED(hr) && ppIEncoderOptions)
+    {
+        PROPBAG2 opts[2]= {{0}};
+        opts[0].pstrName = (LPOLESTR)wszTiffCompressionMethod;
+        opts[0].vt = VT_UI1;
+        opts[0].dwType = PROPBAG2_TYPE_DATA;
+
+        opts[1].pstrName = (LPOLESTR)wszCompressionQuality;
+        opts[1].vt = VT_R4;
+        opts[1].dwType = PROPBAG2_TYPE_DATA;
+
+        hr = CreatePropertyBag2(opts, 2, ppIEncoderOptions);
+
+        if (SUCCEEDED(hr))
+        {
+            VARIANT v;
+            VariantInit(&v);
+            V_VT(&v) = VT_UI1;
+            V_UI1(&v) = WICTiffCompressionDontCare;
+            hr = IPropertyBag2_Write(*ppIEncoderOptions, 1, opts, &v);
+            VariantClear(&v);
+            if (FAILED(hr))
+            {
+                IPropertyBag2_Release(*ppIEncoderOptions);
+                *ppIEncoderOptions = NULL;
+            }
+        }
+    }
+
+    if (SUCCEEDED(hr))
+    {
+        result = HeapAlloc(GetProcessHeap(), 0, sizeof(*result));
+
+        if (result)
+        {
+            result->IWICBitmapFrameEncode_iface.lpVtbl = &TiffFrameEncode_Vtbl;
+            result->ref = 1;
+            result->parent = This;
+            result->initialized = FALSE;
+            result->info_written = FALSE;
+            result->committed = FALSE;
+            result->format = NULL;
+            result->width = 0;
+            result->height = 0;
+            result->xres = 0.0;
+            result->yres = 0.0;
+            result->lines_written = 0;
+            result->colors = 0;
+
+            IWICBitmapEncoder_AddRef(iface);
+            *ppIFrameEncode = &result->IWICBitmapFrameEncode_iface;
+
+            if (This->num_frames != 0)
+                pTIFFWriteDirectory(This->tiff);
+
+            This->num_frames++;
+        }
+        else
+            hr = E_OUTOFMEMORY;
+
+        if (FAILED(hr) && ppIEncoderOptions)
+        {
+            IPropertyBag2_Release(*ppIEncoderOptions);
+            *ppIEncoderOptions = NULL;
+        }
+    }
+
+    LeaveCriticalSection(&This->lock);
+
+    return hr;
+}
+
+static HRESULT WINAPI TiffEncoder_Commit(IWICBitmapEncoder *iface)
+{
+    TiffEncoder *This = impl_from_IWICBitmapEncoder(iface);
+
+    TRACE("(%p)\n", iface);
+
+    EnterCriticalSection(&This->lock);
+
+    if (!This->initialized || This->committed)
+    {
+        LeaveCriticalSection(&This->lock);
+        return WINCODEC_ERR_WRONGSTATE;
+    }
+
+    pTIFFClose(This->tiff);
+    IStream_Release(This->stream);
+    This->stream = NULL;
+    This->tiff = NULL;
+
+    This->committed = TRUE;
+
+    LeaveCriticalSection(&This->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI TiffEncoder_GetMetadataQueryWriter(IWICBitmapEncoder *iface,
+    IWICMetadataQueryWriter **ppIMetadataQueryWriter)
+{
+    FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryWriter);
+    return E_NOTIMPL;
+}
+
+static const IWICBitmapEncoderVtbl TiffEncoder_Vtbl = {
+    TiffEncoder_QueryInterface,
+    TiffEncoder_AddRef,
+    TiffEncoder_Release,
+    TiffEncoder_Initialize,
+    TiffEncoder_GetContainerFormat,
+    TiffEncoder_GetEncoderInfo,
+    TiffEncoder_SetColorContexts,
+    TiffEncoder_SetPalette,
+    TiffEncoder_SetThumbnail,
+    TiffEncoder_SetPreview,
+    TiffEncoder_CreateNewFrame,
+    TiffEncoder_Commit,
+    TiffEncoder_GetMetadataQueryWriter
+};
+
+HRESULT TiffEncoder_CreateInstance(REFIID iid, void** ppv)
+{
+    TiffEncoder *This;
+    HRESULT ret;
+
+    TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
+
+    *ppv = NULL;
+
+    if (!load_libtiff())
+    {
+        ERR("Failed writing TIFF because unable to load %s\n",SONAME_LIBTIFF);
+        return E_FAIL;
+    }
+
+    This = HeapAlloc(GetProcessHeap(), 0, sizeof(TiffEncoder));
+    if (!This) return E_OUTOFMEMORY;
+
+    This->IWICBitmapEncoder_iface.lpVtbl = &TiffEncoder_Vtbl;
+    This->ref = 1;
+    This->stream = NULL;
+    InitializeCriticalSection(&This->lock);
+    This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": TiffEncoder.lock");
+    This->tiff = NULL;
+    This->initialized = FALSE;
+    This->num_frames = 0;
+    This->num_frames_committed = 0;
+    This->committed = FALSE;
+
+    ret = IWICBitmapEncoder_QueryInterface(&This->IWICBitmapEncoder_iface, iid, ppv);
+    IWICBitmapEncoder_Release(&This->IWICBitmapEncoder_iface);
+
+    return ret;
+}
+
+#else /* !SONAME_LIBTIFF */
+
+HRESULT TiffDecoder_CreateInstance(REFIID iid, void** ppv)
+{
+    ERR("Trying to load TIFF picture, but Wine was compiled without TIFF support.\n");
+    return E_FAIL;
+}
+
+HRESULT TiffEncoder_CreateInstance(REFIID iid, void** ppv)
+{
+    ERR("Trying to save TIFF picture, but Wine was compiled without TIFF support.\n");
+    return E_FAIL;
+}
+
+#endif