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reactos/dll/win32/windowscodecs/bmpdecode.c

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/*
* Copyright 2009 Vincent Povirk for CodeWeavers
*
* 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 "config.h"
#include <assert.h>
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "wingdi.h"
#include "objbase.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
typedef struct {
DWORD bc2Size;
DWORD bc2Width;
DWORD bc2Height;
WORD bc2Planes;
WORD bc2BitCount;
DWORD bc2Compression;
DWORD bc2SizeImage;
DWORD bc2XRes;
DWORD bc2YRes;
DWORD bc2ClrUsed;
DWORD bc2ClrImportant;
/* same as BITMAPINFOHEADER until this point */
WORD bc2ResUnit;
WORD bc2Reserved;
WORD bc2Orientation;
WORD bc2Halftoning;
DWORD bc2HalftoneSize1;
DWORD bc2HalftoneSize2;
DWORD bc2ColorSpace;
DWORD bc2AppData;
} BITMAPCOREHEADER2;
typedef HRESULT (*ReadDataFunc)(BmpDecoder* This);
struct BmpDecoder {
IWICBitmapDecoder IWICBitmapDecoder_iface;
IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
LONG ref;
BOOL initialized;
IStream *stream;
ULONG palette_offset;
ULONG image_offset;
BITMAPV5HEADER bih;
const WICPixelFormatGUID *pixelformat;
int bitsperpixel;
ReadDataFunc read_data_func;
INT stride;
BYTE *imagedata;
BYTE *imagedatastart;
CRITICAL_SECTION lock; /* must be held when initialized/imagedata is set or stream is accessed */
int packed; /* If TRUE, don't look for a file header and assume a packed DIB. */
int icoframe; /* If TRUE, this is a frame of a .ico file. */
};
static inline BmpDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
{
return CONTAINING_RECORD(iface, BmpDecoder, IWICBitmapDecoder_iface);
}
static inline BmpDecoder *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, BmpDecoder, IWICBitmapFrameDecode_iface);
}
static HRESULT WINAPI BmpFrameDecode_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
void **ppv)
{
BmpDecoder *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
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI BmpFrameDecode_AddRef(IWICBitmapFrameDecode *iface)
{
BmpDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
return IWICBitmapDecoder_AddRef(&This->IWICBitmapDecoder_iface);
}
static ULONG WINAPI BmpFrameDecode_Release(IWICBitmapFrameDecode *iface)
{
BmpDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
return IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
}
static HRESULT WINAPI BmpFrameDecode_GetSize(IWICBitmapFrameDecode *iface,
UINT *puiWidth, UINT *puiHeight)
{
BmpDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p,%p)\n", iface, puiWidth, puiHeight);
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
*puiWidth = bch->bcWidth;
*puiHeight = bch->bcHeight;
}
else
{
*puiWidth = This->bih.bV5Width;
*puiHeight = abs(This->bih.bV5Height);
}
return S_OK;
}
static HRESULT WINAPI BmpFrameDecode_GetPixelFormat(IWICBitmapFrameDecode *iface,
WICPixelFormatGUID *pPixelFormat)
{
BmpDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p)\n", iface, pPixelFormat);
memcpy(pPixelFormat, This->pixelformat, sizeof(GUID));
return S_OK;
}
static HRESULT BmpHeader_GetResolution(BITMAPV5HEADER *bih, double *pDpiX, double *pDpiY)
{
LONG resx = 0, resy = 0;
switch (bih->bV5Size)
{
default:
case sizeof(BITMAPCOREHEADER):
break;
case sizeof(BITMAPCOREHEADER2):
case sizeof(BITMAPINFOHEADER):
case sizeof(BITMAPV4HEADER):
case sizeof(BITMAPV5HEADER):
resx = bih->bV5XPelsPerMeter;
resy = bih->bV5YPelsPerMeter;
break;
}
if (!resx || !resy)
{
*pDpiX = 96.0;
*pDpiY = 96.0;
}
else
{
*pDpiX = resx * 0.0254;
*pDpiY = resy * 0.0254;
}
return S_OK;
}
static HRESULT WINAPI BmpFrameDecode_GetResolution(IWICBitmapFrameDecode *iface,
double *pDpiX, double *pDpiY)
{
BmpDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
TRACE("(%p,%p,%p)\n", iface, pDpiX, pDpiY);
return BmpHeader_GetResolution(&This->bih, pDpiX, pDpiY);
}
static HRESULT WINAPI BmpFrameDecode_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
HRESULT hr;
BmpDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
int count;
WICColor *wiccolors=NULL;
RGBTRIPLE *bgrcolors=NULL;
TRACE("(%p,%p)\n", iface, pIPalette);
EnterCriticalSection(&This->lock);
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
if (bch->bcBitCount <= 8)
{
/* 2**n colors in BGR format after the header */
ULONG tablesize, bytesread;
LARGE_INTEGER offset;
int i;
count = 1 << bch->bcBitCount;
wiccolors = HeapAlloc(GetProcessHeap(), 0, sizeof(WICColor) * count);
tablesize = sizeof(RGBTRIPLE) * count;
bgrcolors = HeapAlloc(GetProcessHeap(), 0, tablesize);
if (!wiccolors || !bgrcolors)
{
hr = E_OUTOFMEMORY;
goto end;
}
offset.QuadPart = This->palette_offset;
hr = IStream_Seek(This->stream, offset, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto end;
hr = IStream_Read(This->stream, bgrcolors, tablesize, &bytesread);
if (FAILED(hr)) goto end;
if (bytesread != tablesize) {
hr = E_FAIL;
goto end;
}
for (i=0; i<count; i++)
{
wiccolors[i] = 0xff000000|
(bgrcolors[i].rgbtRed<<16)|
(bgrcolors[i].rgbtGreen<<8)|
bgrcolors[i].rgbtBlue;
}
}
else
{
hr = WINCODEC_ERR_PALETTEUNAVAILABLE;
goto end;
}
}
else
{
if (This->bih.bV5BitCount <= 8)
{
ULONG tablesize, bytesread;
LARGE_INTEGER offset;
int i;
if (This->bih.bV5ClrUsed == 0)
count = 1 << This->bih.bV5BitCount;
else
count = min(This->bih.bV5ClrUsed, 1 << This->bih.bV5BitCount);
tablesize = sizeof(WICColor) * count;
wiccolors = HeapAlloc(GetProcessHeap(), 0, tablesize);
if (!wiccolors)
{
hr = E_OUTOFMEMORY;
goto end;
}
offset.QuadPart = This->palette_offset;
hr = IStream_Seek(This->stream, offset, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto end;
hr = IStream_Read(This->stream, wiccolors, tablesize, &bytesread);
if (FAILED(hr)) goto end;
if (bytesread != tablesize) {
hr = E_FAIL;
goto end;
}
/* convert from BGR to BGRA by setting alpha to 100% */
for (i=0; i<count; i++)
wiccolors[i] |= 0xff000000;
}
else
{
hr = WINCODEC_ERR_PALETTEUNAVAILABLE;
goto end;
}
}
end:
LeaveCriticalSection(&This->lock);
if (SUCCEEDED(hr))
hr = IWICPalette_InitializeCustom(pIPalette, wiccolors, count);
HeapFree(GetProcessHeap(), 0, wiccolors);
HeapFree(GetProcessHeap(), 0, bgrcolors);
return hr;
}
static HRESULT WINAPI BmpFrameDecode_CopyPixels(IWICBitmapFrameDecode *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
BmpDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
HRESULT hr=S_OK;
UINT width, height;
TRACE("(%p,%s,%u,%u,%p)\n", iface, debug_wic_rect(prc), cbStride, cbBufferSize, pbBuffer);
EnterCriticalSection(&This->lock);
if (!This->imagedata)
{
hr = This->read_data_func(This);
}
LeaveCriticalSection(&This->lock);
if (FAILED(hr)) return hr;
hr = BmpFrameDecode_GetSize(iface, &width, &height);
if (FAILED(hr)) return hr;
return copy_pixels(This->bitsperpixel, This->imagedatastart,
width, height, This->stride,
prc, cbStride, cbBufferSize, pbBuffer);
}
static HRESULT WINAPI BmpFrameDecode_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI BmpFrameDecode_GetColorContexts(IWICBitmapFrameDecode *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI BmpFrameDecode_GetThumbnail(IWICBitmapFrameDecode *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static HRESULT BmpFrameDecode_ReadUncompressed(BmpDecoder* This)
{
UINT bytesperrow;
UINT width, height;
UINT datasize;
int bottomup;
HRESULT hr;
LARGE_INTEGER offbits;
ULONG bytesread;
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
width = bch->bcWidth;
height = bch->bcHeight;
bottomup = 1;
}
else
{
width = This->bih.bV5Width;
height = abs(This->bih.bV5Height);
bottomup = (This->bih.bV5Height > 0);
}
/* row sizes in BMP files must be divisible by 4 bytes */
bytesperrow = (((width * This->bitsperpixel)+31)/32)*4;
datasize = bytesperrow * height;
This->imagedata = HeapAlloc(GetProcessHeap(), 0, datasize);
if (!This->imagedata) return E_OUTOFMEMORY;
offbits.QuadPart = This->image_offset;
hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto fail;
hr = IStream_Read(This->stream, This->imagedata, datasize, &bytesread);
if (FAILED(hr) || bytesread != datasize) goto fail;
if (bottomup)
{
This->imagedatastart = This->imagedata + (height-1) * bytesperrow;
This->stride = -bytesperrow;
}
else
{
This->imagedatastart = This->imagedata;
This->stride = bytesperrow;
}
return S_OK;
fail:
HeapFree(GetProcessHeap(), 0, This->imagedata);
This->imagedata = NULL;
if (SUCCEEDED(hr)) hr = E_FAIL;
return hr;
}
static HRESULT BmpFrameDecode_ReadRGB8(BmpDecoder* This)
{
HRESULT hr;
UINT width, height;
hr = IWICBitmapFrameDecode_GetSize(&This->IWICBitmapFrameDecode_iface, &width, &height);
if (SUCCEEDED(hr))
{
hr = BmpFrameDecode_ReadUncompressed(This);
}
if (SUCCEEDED(hr))
{
reverse_bgr8(This->bitsperpixel/8, This->imagedatastart,
width, height, This->stride);
}
return hr;
}
static HRESULT ReadByte(IStream *stream, BYTE *buffer, ULONG buffer_size,
ULONG *cursor, ULONG *bytesread, BYTE *result)
{
HRESULT hr=S_OK;
if (*bytesread == 0 || *cursor == *bytesread)
{
hr = IStream_Read(stream, buffer, buffer_size, bytesread);
*cursor = 0;
}
if (SUCCEEDED(hr))
{
if (*cursor < *bytesread)
*result = buffer[(*cursor)++];
else
hr = E_FAIL;
}
return hr;
}
static HRESULT BmpFrameDecode_ReadRLE8(BmpDecoder* This)
{
UINT bytesperrow;
UINT width, height;
BYTE rledata[4096];
UINT datasize, palettesize;
DWORD palette[256];
UINT x, y;
DWORD *bgrdata;
HRESULT hr;
LARGE_INTEGER offbits;
ULONG cursor=0, bytesread=0;
width = This->bih.bV5Width;
height = abs(This->bih.bV5Height);
bytesperrow = width * 4;
datasize = bytesperrow * height;
if (This->bih.bV5ClrUsed && This->bih.bV5ClrUsed < 256)
palettesize = 4 * This->bih.bV5ClrUsed;
else
palettesize = 4 * 256;
This->imagedata = HeapAlloc(GetProcessHeap(), 0, datasize);
if (!This->imagedata)
{
hr = E_OUTOFMEMORY;
goto fail;
}
/* read palette */
offbits.QuadPart = This->palette_offset;
hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto fail;
hr = IStream_Read(This->stream, palette, palettesize, &bytesread);
if (FAILED(hr) || bytesread != palettesize) goto fail;
/* read RLE data */
offbits.QuadPart = This->image_offset;
hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto fail;
/* decode RLE */
bgrdata = (DWORD*)This->imagedata;
x = 0;
y = 0;
cursor = 0;
bytesread = 0;
while (y < height)
{
BYTE length;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &length);
if (FAILED(hr))
goto fail;
else if (length == 0)
{
/* escape code */
BYTE escape;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &escape);
if (FAILED(hr))
goto fail;
switch(escape)
{
case 0: /* end of line */
x = 0;
y++;
break;
case 1: /* end of bitmap */
goto end;
case 2: /* delta */
{
BYTE dx, dy;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &dx);
if (SUCCEEDED(hr))
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &dy);
if (FAILED(hr))
goto fail;
x += dx;
y += dy;
break;
}
default: /* absolute mode */
length = escape;
while (length-- && x < width)
{
BYTE index;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &index);
if (FAILED(hr))
goto fail;
bgrdata[y*width + x++] = palette[index];
}
if (escape & 1)
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &length); /* skip pad byte */
if (FAILED(hr))
goto fail;
}
}
else
{
BYTE index;
DWORD color;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &index);
if (FAILED(hr))
goto fail;
color = palette[index];
while (length-- && x < width)
bgrdata[y*width + x++] = color;
}
}
end:
This->imagedatastart = This->imagedata + (height-1) * bytesperrow;
This->stride = -bytesperrow;
return S_OK;
fail:
HeapFree(GetProcessHeap(), 0, This->imagedata);
This->imagedata = NULL;
if (SUCCEEDED(hr)) hr = E_FAIL;
return hr;
}
static HRESULT BmpFrameDecode_ReadRLE4(BmpDecoder* This)
{
UINT bytesperrow;
UINT width, height;
BYTE rledata[4096];
UINT datasize, palettesize;
DWORD palette[16];
UINT x, y;
DWORD *bgrdata;
HRESULT hr;
LARGE_INTEGER offbits;
ULONG cursor=0, bytesread=0;
width = This->bih.bV5Width;
height = abs(This->bih.bV5Height);
bytesperrow = width * 4;
datasize = bytesperrow * height;
if (This->bih.bV5ClrUsed && This->bih.bV5ClrUsed < 16)
palettesize = 4 * This->bih.bV5ClrUsed;
else
palettesize = 4 * 16;
This->imagedata = HeapAlloc(GetProcessHeap(), 0, datasize);
if (!This->imagedata)
{
hr = E_OUTOFMEMORY;
goto fail;
}
/* read palette */
offbits.QuadPart = This->palette_offset;
hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto fail;
hr = IStream_Read(This->stream, palette, palettesize, &bytesread);
if (FAILED(hr) || bytesread != palettesize) goto fail;
/* read RLE data */
offbits.QuadPart = This->image_offset;
hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto fail;
/* decode RLE */
bgrdata = (DWORD*)This->imagedata;
x = 0;
y = 0;
cursor = 0;
bytesread = 0;
while (y < height)
{
BYTE length;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &length);
if (FAILED(hr))
goto fail;
else if (length == 0)
{
/* escape code */
BYTE escape;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &escape);
if (FAILED(hr))
goto fail;
switch(escape)
{
case 0: /* end of line */
x = 0;
y++;
break;
case 1: /* end of bitmap */
goto end;
case 2: /* delta */
{
BYTE dx, dy;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &dx);
if (SUCCEEDED(hr))
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &dy);
if (FAILED(hr))
goto fail;
x += dx;
y += dy;
break;
}
default: /* absolute mode */
{
BYTE realsize=0;
length = escape;
while (length-- && x < width)
{
BYTE colors;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &colors);
realsize++;
if (FAILED(hr))
goto fail;
bgrdata[y*width + x++] = palette[colors>>4];
if (length-- && x < width)
bgrdata[y*width + x++] = palette[colors&0xf];
else
break;
}
if (realsize & 1)
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &length); /* skip pad byte */
if (FAILED(hr))
goto fail;
}
}
}
else
{
BYTE colors;
DWORD color1;
DWORD color2;
hr = ReadByte(This->stream, rledata, 4096, &cursor, &bytesread, &colors);
if (FAILED(hr))
goto fail;
color1 = palette[colors>>4];
color2 = palette[colors&0xf];
while (length-- && x < width)
{
bgrdata[y*width + x++] = color1;
if (length-- && x < width)
bgrdata[y*width + x++] = color2;
else
break;
}
}
}
end:
This->imagedatastart = This->imagedata + (height-1) * bytesperrow;
This->stride = -bytesperrow;
return S_OK;
fail:
HeapFree(GetProcessHeap(), 0, This->imagedata);
This->imagedata = NULL;
if (SUCCEEDED(hr)) hr = E_FAIL;
return hr;
}
static HRESULT BmpFrameDecode_ReadUnsupported(BmpDecoder* This)
{
return E_FAIL;
}
struct bitfields_format {
WORD bitcount; /* 0 for end of list */
DWORD redmask;
DWORD greenmask;
DWORD bluemask;
DWORD alphamask;
const WICPixelFormatGUID *pixelformat;
ReadDataFunc read_data_func;
};
static const struct bitfields_format bitfields_formats[] = {
{16,0x7c00,0x3e0,0x1f,0,&GUID_WICPixelFormat16bppBGR555,BmpFrameDecode_ReadUncompressed},
{16,0xf800,0x7e0,0x1f,0,&GUID_WICPixelFormat16bppBGR565,BmpFrameDecode_ReadUncompressed},
{32,0xff0000,0xff00,0xff,0,&GUID_WICPixelFormat32bppBGR,BmpFrameDecode_ReadUncompressed},
{32,0xff0000,0xff00,0xff,0xff000000,&GUID_WICPixelFormat32bppBGRA,BmpFrameDecode_ReadUncompressed},
{32,0xff,0xff00,0xff0000,0,&GUID_WICPixelFormat32bppBGR,BmpFrameDecode_ReadRGB8},
{0}
};
static const IWICBitmapFrameDecodeVtbl BmpDecoder_FrameVtbl = {
BmpFrameDecode_QueryInterface,
BmpFrameDecode_AddRef,
BmpFrameDecode_Release,
BmpFrameDecode_GetSize,
BmpFrameDecode_GetPixelFormat,
BmpFrameDecode_GetResolution,
BmpFrameDecode_CopyPalette,
BmpFrameDecode_CopyPixels,
BmpFrameDecode_GetMetadataQueryReader,
BmpFrameDecode_GetColorContexts,
BmpFrameDecode_GetThumbnail
};
static HRESULT BmpDecoder_ReadHeaders(BmpDecoder* This, IStream *stream)
{
HRESULT hr;
ULONG bytestoread, bytesread;
LARGE_INTEGER seek;
if (This->initialized) return WINCODEC_ERR_WRONGSTATE;
seek.QuadPart = 0;
hr = IStream_Seek(stream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) return hr;
if (!This->packed)
{
BITMAPFILEHEADER bfh;
hr = IStream_Read(stream, &bfh, sizeof(BITMAPFILEHEADER), &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != sizeof(BITMAPFILEHEADER) ||
bfh.bfType != 0x4d42 /* "BM" */) return E_FAIL;
This->image_offset = bfh.bfOffBits;
}
hr = IStream_Read(stream, &This->bih.bV5Size, sizeof(DWORD), &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != sizeof(DWORD) ||
(This->bih.bV5Size != sizeof(BITMAPCOREHEADER) &&
This->bih.bV5Size != sizeof(BITMAPCOREHEADER2) &&
This->bih.bV5Size != sizeof(BITMAPINFOHEADER) &&
This->bih.bV5Size != sizeof(BITMAPV4HEADER) &&
This->bih.bV5Size != sizeof(BITMAPV5HEADER))) return E_FAIL;
bytestoread = This->bih.bV5Size-sizeof(DWORD);
hr = IStream_Read(stream, &This->bih.bV5Width, bytestoread, &bytesread);
if (FAILED(hr)) return hr;
if (bytestoread != bytesread) return E_FAIL;
if (This->packed)
This->palette_offset = This->bih.bV5Size;
else
This->palette_offset = sizeof(BITMAPFILEHEADER) + This->bih.bV5Size;
if (This->icoframe)
{
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
bch->bcHeight /= 2;
}
else
{
This->bih.bV5Height /= 2;
}
}
/* if this is a BITMAPINFOHEADER with BI_BITFIELDS compression, we need to
read the extra fields */
if (This->bih.bV5Size == sizeof(BITMAPINFOHEADER) &&
This->bih.bV5Compression == BI_BITFIELDS)
{
hr = IStream_Read(stream, &This->bih.bV5RedMask, 12, &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != 12) return E_FAIL;
This->bih.bV5AlphaMask = 0;
This->palette_offset += 12;
}
/* decide what kind of bitmap this is and how/if we can read it */
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER *bch = (BITMAPCOREHEADER*)&This->bih;
TRACE("BITMAPCOREHEADER with depth=%i\n", bch->bcBitCount);
This->bitsperpixel = bch->bcBitCount;
This->read_data_func = BmpFrameDecode_ReadUncompressed;
switch(bch->bcBitCount)
{
case 1:
This->pixelformat = &GUID_WICPixelFormat1bppIndexed;
break;
case 2:
This->pixelformat = &GUID_WICPixelFormat2bppIndexed;
break;
case 4:
This->pixelformat = &GUID_WICPixelFormat4bppIndexed;
break;
case 8:
This->pixelformat = &GUID_WICPixelFormat8bppIndexed;
break;
case 24:
This->pixelformat = &GUID_WICPixelFormat24bppBGR;
break;
default:
This->pixelformat = &GUID_WICPixelFormatUndefined;
WARN("unsupported bit depth %i for BITMAPCOREHEADER\n", bch->bcBitCount);
break;
}
}
else /* struct is compatible with BITMAPINFOHEADER */
{
TRACE("bitmap header=%i compression=%i depth=%i\n", This->bih.bV5Size, This->bih.bV5Compression, This->bih.bV5BitCount);
switch(This->bih.bV5Compression)
{
case BI_RGB:
This->bitsperpixel = This->bih.bV5BitCount;
This->read_data_func = BmpFrameDecode_ReadUncompressed;
switch(This->bih.bV5BitCount)
{
case 1:
This->pixelformat = &GUID_WICPixelFormat1bppIndexed;
break;
case 2:
This->pixelformat = &GUID_WICPixelFormat2bppIndexed;
break;
case 4:
This->pixelformat = &GUID_WICPixelFormat4bppIndexed;
break;
case 8:
This->pixelformat = &GUID_WICPixelFormat8bppIndexed;
break;
case 16:
This->pixelformat = &GUID_WICPixelFormat16bppBGR555;
break;
case 24:
This->pixelformat = &GUID_WICPixelFormat24bppBGR;
break;
case 32:
This->pixelformat = &GUID_WICPixelFormat32bppBGR;
break;
default:
This->pixelformat = &GUID_WICPixelFormatUndefined;
FIXME("unsupported bit depth %i for uncompressed RGB\n", This->bih.bV5BitCount);
}
break;
case BI_RLE8:
This->bitsperpixel = 32;
This->read_data_func = BmpFrameDecode_ReadRLE8;
This->pixelformat = &GUID_WICPixelFormat32bppBGR;
break;
case BI_RLE4:
This->bitsperpixel = 32;
This->read_data_func = BmpFrameDecode_ReadRLE4;
This->pixelformat = &GUID_WICPixelFormat32bppBGR;
break;
case BI_BITFIELDS:
{
const struct bitfields_format *format;
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER2))
{
/* BCH2 doesn't support bitfields; this is Huffman 1D compression */
This->bitsperpixel = 0;
This->read_data_func = BmpFrameDecode_ReadUnsupported;
This->pixelformat = &GUID_WICPixelFormatUndefined;
FIXME("Huffman 1D compression is unsupported\n");
break;
}
This->bitsperpixel = This->bih.bV5BitCount;
for (format = bitfields_formats; format->bitcount; format++)
{
if ((format->bitcount == This->bih.bV5BitCount) &&
(format->redmask == This->bih.bV5RedMask) &&
(format->greenmask == This->bih.bV5GreenMask) &&
(format->bluemask == This->bih.bV5BlueMask) &&
(format->alphamask == This->bih.bV5AlphaMask))
{
This->read_data_func = format->read_data_func;
This->pixelformat = format->pixelformat;
break;
}
}
if (!format->bitcount)
{
This->read_data_func = BmpFrameDecode_ReadUncompressed;
This->pixelformat = &GUID_WICPixelFormatUndefined;
FIXME("unsupported bitfields type depth=%i red=%x green=%x blue=%x alpha=%x\n",
This->bih.bV5BitCount, This->bih.bV5RedMask, This->bih.bV5GreenMask, This->bih.bV5BlueMask, This->bih.bV5AlphaMask);
}
break;
}
default:
This->bitsperpixel = 0;
This->read_data_func = BmpFrameDecode_ReadUnsupported;
This->pixelformat = &GUID_WICPixelFormatUndefined;
FIXME("unsupported bitmap type header=%i compression=%i depth=%i\n", This->bih.bV5Size, This->bih.bV5Compression, This->bih.bV5BitCount);
break;
}
}
if (This->packed)
{
/* In a packed DIB, the image follows the palette. */
ULONG palette_count, palette_size;
if (This->bih.bV5ClrUsed)
palette_count = This->bih.bV5ClrUsed;
else if (This->bih.bV5BitCount <= 8)
palette_count = 1 << This->bih.bV5BitCount;
else
palette_count = 0;
if (This->bih.bV5Size == sizeof(BITMAPCOREHEADER))
palette_size = sizeof(RGBTRIPLE) * palette_count;
else
palette_size = sizeof(RGBQUAD) * palette_count;
This->image_offset = This->palette_offset + palette_size;
}
This->initialized = TRUE;
return S_OK;
}
static HRESULT WINAPI BmpDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
BmpDecoder *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 BmpDecoder_AddRef(IWICBitmapDecoder *iface)
{
BmpDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI BmpDecoder_Release(IWICBitmapDecoder *iface)
{
BmpDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
if (This->stream) IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This->imagedata);
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI BmpDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *stream,
DWORD *capability)
{
HRESULT hr;
BmpDecoder *This = impl_from_IWICBitmapDecoder(iface);
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 = This->read_data_func == BmpFrameDecode_ReadUnsupported ? 0 : WICBitmapDecoderCapabilityCanDecodeAllImages;
return S_OK;
}
static HRESULT WINAPI BmpDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
HRESULT hr;
BmpDecoder *This = impl_from_IWICBitmapDecoder(iface);
EnterCriticalSection(&This->lock);
hr = BmpDecoder_ReadHeaders(This, pIStream);
if (SUCCEEDED(hr))
{
This->stream = pIStream;
IStream_AddRef(pIStream);
}
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI BmpDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
memcpy(pguidContainerFormat, &GUID_ContainerFormatBmp, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI BmpDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
IWICBitmapDecoderInfo **ppIDecoderInfo)
{
TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
return get_decoder_info(&CLSID_WICBmpDecoder, ppIDecoderInfo);
}
static HRESULT WINAPI BmpDecoder_CopyPalette(IWICBitmapDecoder *iface,
IWICPalette *pIPalette)
{
TRACE("(%p,%p)\n", iface, pIPalette);
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
static HRESULT WINAPI BmpDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
TRACE("(%p,%p)\n", iface, ppIMetadataQueryReader);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI BmpDecoder_GetPreview(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIBitmapSource)
{
TRACE("(%p,%p)\n", iface, ppIBitmapSource);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI BmpDecoder_GetColorContexts(IWICBitmapDecoder *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
TRACE("(%p,%u,%p,%p)\n", iface, cCount, ppIColorContexts, pcActualCount);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI BmpDecoder_GetThumbnail(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIThumbnail)
{
TRACE("(%p,%p)\n", iface, ppIThumbnail);
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static HRESULT WINAPI BmpDecoder_GetFrameCount(IWICBitmapDecoder *iface,
UINT *pCount)
{
if (!pCount) return E_INVALIDARG;
*pCount = 1;
return S_OK;
}
static HRESULT WINAPI BmpDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
BmpDecoder *This = impl_from_IWICBitmapDecoder(iface);
if (index != 0) return E_INVALIDARG;
if (!This->stream) return WINCODEC_ERR_FRAMEMISSING;
*ppIBitmapFrame = &This->IWICBitmapFrameDecode_iface;
IWICBitmapDecoder_AddRef(iface);
return S_OK;
}
static const IWICBitmapDecoderVtbl BmpDecoder_Vtbl = {
BmpDecoder_QueryInterface,
BmpDecoder_AddRef,
BmpDecoder_Release,
BmpDecoder_QueryCapability,
BmpDecoder_Initialize,
BmpDecoder_GetContainerFormat,
BmpDecoder_GetDecoderInfo,
BmpDecoder_CopyPalette,
BmpDecoder_GetMetadataQueryReader,
BmpDecoder_GetPreview,
BmpDecoder_GetColorContexts,
BmpDecoder_GetThumbnail,
BmpDecoder_GetFrameCount,
BmpDecoder_GetFrame
};
static HRESULT BmpDecoder_Create(int packed, int icoframe, BmpDecoder **ppDecoder)
{
BmpDecoder *This;
This = HeapAlloc(GetProcessHeap(), 0, sizeof(BmpDecoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapDecoder_iface.lpVtbl = &BmpDecoder_Vtbl;
This->IWICBitmapFrameDecode_iface.lpVtbl = &BmpDecoder_FrameVtbl;
This->ref = 1;
This->initialized = FALSE;
This->stream = NULL;
This->imagedata = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": BmpDecoder.lock");
This->packed = packed;
This->icoframe = icoframe;
*ppDecoder = This;
return S_OK;
}
static HRESULT BmpDecoder_Construct(int packed, int icoframe, REFIID iid, void** ppv)
{
BmpDecoder *This;
HRESULT ret;
TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
*ppv = NULL;
ret = BmpDecoder_Create(packed, icoframe, &This);
if (FAILED(ret)) return ret;
ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
return ret;
}
HRESULT BmpDecoder_CreateInstance(REFIID iid, void** ppv)
{
return BmpDecoder_Construct(FALSE, FALSE, iid, ppv);
}
HRESULT DibDecoder_CreateInstance(REFIID iid, void** ppv)
{
return BmpDecoder_Construct(TRUE, FALSE, iid, ppv);
}
HRESULT IcoDibDecoder_CreateInstance(BmpDecoder **ppDecoder)
{
return BmpDecoder_Create(TRUE, TRUE, ppDecoder);
}
void BmpDecoder_GetWICDecoder(BmpDecoder *This, IWICBitmapDecoder **ppDecoder)
{
*ppDecoder = &This->IWICBitmapDecoder_iface;
}
/* Return the offset where the mask of an icon might be, or 0 for failure. */
void BmpDecoder_FindIconMask(BmpDecoder *This, ULONG *mask_offset, int *topdown)
{
assert(This->stream != NULL);
if (This->read_data_func == BmpFrameDecode_ReadUncompressed)
{
/* RGB or BITFIELDS data */
ULONG width, height, bytesperrow, datasize;
IWICBitmapFrameDecode_GetSize(&This->IWICBitmapFrameDecode_iface, &width, &height);
bytesperrow = (((width * This->bitsperpixel)+31)/32)*4;
datasize = bytesperrow * height;
*mask_offset = This->image_offset + datasize;
}
else
*mask_offset = 0;
*topdown = This->stride > 0;
}
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