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 WINAPI JpegDecoder_Frame_CopyPixels(IWICBitmapFrameDecode *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
JpegDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
UINT bpp;
UINT stride;
UINT data_size;
UINT max_row_needed;
jmp_buf jmpbuf;
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->cinfo.output_width;
rect.Height = This->cinfo.output_height;
prc = ▭
}
else
{
if (prc->X < 0 || prc->Y < 0 || prc->X+prc->Width > This->cinfo.output_width ||
prc->Y+prc->Height > This->cinfo.output_height)
return E_INVALIDARG;
}
if (This->cinfo.out_color_space == JCS_GRAYSCALE) bpp = 8;
else if (This->cinfo.out_color_space == JCS_CMYK) bpp = 32;
else bpp = 24;
stride = bpp * This->cinfo.output_width;
data_size = stride * This->cinfo.output_height;
max_row_needed = prc->Y + prc->Height;
if (max_row_needed > This->cinfo.output_height) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
if (!This->image_data)
{
This->image_data = HeapAlloc(GetProcessHeap(), 0, data_size);
if (!This->image_data)
{
LeaveCriticalSection(&This->lock);
return E_OUTOFMEMORY;
}
}
This->cinfo.client_data = &jmpbuf;
if (setjmp(jmpbuf))
{
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
while (max_row_needed > This->cinfo.output_scanline)
{
UINT first_scanline = This->cinfo.output_scanline;
UINT max_rows;
JSAMPROW out_rows[4];
UINT i;
JDIMENSION ret;
max_rows = min(This->cinfo.output_height-first_scanline, 4);
for (i=0; i<max_rows; i++)
out_rows[i] = This->image_data + stride * (first_scanline+i);
ret = pjpeg_read_scanlines(&This->cinfo, out_rows, max_rows);
if (ret == 0)
{
ERR("read_scanlines failed\n");
LeaveCriticalSection(&This->lock);
return E_FAIL;
}
if (bpp == 24)
{
/* libjpeg gives us RGB data and we want BGR, so byteswap the data */
reverse_bgr8(3, This->image_data + stride * first_scanline,
This->cinfo.output_width, This->cinfo.output_scanline - first_scanline,
stride);
}
if (This->cinfo.out_color_space == JCS_CMYK && This->cinfo.saw_Adobe_marker)
/* Adobe JPEG's have inverted CMYK data. */
for (i=0; i<data_size; i++)
This->image_data[i] ^= 0xff;
}
LeaveCriticalSection(&This->lock);
return copy_pixels(bpp, This->image_data,
This->cinfo.output_width, This->cinfo.output_height, stride,
prc, cbStride, cbBufferSize, pbBuffer);
}
