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windowscodecs: Add support for decoding RLE4-encoded BMP files.

This commit is contained in:
Vincent Povirk 2009-07-06 15:51:44 -05:00 committed by Alexandre Julliard
parent 07a6b89f87
commit 48d58cef59
2 changed files with 293 additions and 0 deletions
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126
dlls/windowscodecs/bmpdecode.c
View File

@ -492,6 +492,127 @@ fail:
return hr;
}
static HRESULT BmpFrameDecode_ReadRLE4(BmpFrameDecode* This)
{
UINT bytesperrow;
UINT width, height;
BYTE *rledata, *cursor, *rledataend;
UINT rlesize, datasize, palettesize;
DWORD palette[16];
UINT x, y;
DWORD *bgrdata;
HRESULT hr;
LARGE_INTEGER offbits;
ULONG bytesread;
width = This->bih.bV5Width;
height = abs(This->bih.bV5Height);
bytesperrow = width * 4;
datasize = bytesperrow * height;
rlesize = This->bih.bV5SizeImage;
if (This->bih.bV5ClrUsed && This->bih.bV5ClrUsed < 16)
palettesize = 4 * This->bih.bV5ClrUsed;
else
palettesize = 4 * 16;
rledata = HeapAlloc(GetProcessHeap(), 0, rlesize);
This->imagedata = HeapAlloc(GetProcessHeap(), 0, datasize);
if (!This->imagedata || !rledata)
{
hr = E_OUTOFMEMORY;
goto fail;
}
/* read palette */
offbits.QuadPart = sizeof(BITMAPFILEHEADER) + This->bih.bV5Size;
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->bfh.bfOffBits;
hr = IStream_Seek(This->stream, offbits, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto fail;
hr = IStream_Read(This->stream, rledata, rlesize, &bytesread);
if (FAILED(hr) || bytesread != rlesize) goto fail;
/* decode RLE */
bgrdata = (DWORD*)This->imagedata;
x = 0;
y = 0;
rledataend = rledata + rlesize;
cursor = rledata;
while (cursor < rledataend && y < height)
{
BYTE length = *cursor++;
if (length == 0)
{
/* escape code */
BYTE escape = *cursor++;
switch(escape)
{
case 0: /* end of line */
x = 0;
y++;
break;
case 1: /* end of bitmap */
goto end;
case 2: /* delta */
if (cursor < rledataend)
{
x += *cursor++;
y += *cursor++;
}
break;
default: /* absolute mode */
length = escape;
while (cursor < rledataend && length-- && x < width)
{
BYTE colors = *cursor++;
bgrdata[y*width + x++] = palette[colors>>4];
if (length-- && x < width)
bgrdata[y*width + x++] = palette[colors&0xf];
else
break;
}
if ((cursor - rledata) & 1) cursor++; /* skip pad byte */
}
}
else
{
BYTE colors = *cursor++;
DWORD color1 = palette[colors>>4];
DWORD 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:
HeapFree(GetProcessHeap(), 0, rledata);
This->imagedatastart = This->imagedata + (height-1) * bytesperrow;
This->stride = -bytesperrow;
return S_OK;
fail:
HeapFree(GetProcessHeap(), 0, rledata);
HeapFree(GetProcessHeap(), 0, This->imagedata);
This->imagedata = NULL;
if (SUCCEEDED(hr)) hr = E_FAIL;
return hr;
}
static HRESULT BmpFrameDecode_ReadUnsupported(BmpFrameDecode* This)
{
return E_FAIL;
@ -626,6 +747,11 @@ static HRESULT BmpDecoder_ReadHeaders(BmpDecoder* This, IStream *stream)
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;
default:
This->bitsperpixel = 0;
This->read_data_func = BmpFrameDecode_ReadUnsupported;

167
dlls/windowscodecs/tests/bmpformat.c
View File

@ -721,6 +721,172 @@ static void test_decode_rle8(void)
IWICBitmapDecoder_Release(decoder);
}
static const char testbmp_rle4[] = {
/* BITMAPFILEHEADER */
66,77, /* "BM" */
142,0,0,0, /* file size */
0,0,0,0, /* reserved */
78,0,0,0, /* offset to bits */
/* BITMAPINFOHEADER */
40,0,0,0, /* header size */
8,0,0,0, /* width */
8,0,0,0, /* height */
1,0, /* planes */
4,0, /* bit count */
2,0,0,0, /* compression = BI_RLE4 */
64,0,0,0, /* image size */
19,11,0,0, /* X pixels per meter */
19,11,0,0, /* Y pixels per meter */
6,0,0,0, /* colors used */
6,0,0,0, /* colors important */
/* color table */
0,0,0,0,
255,0,0,0,
0,0,255,0,
255,0,255,0,
0,255,0,0,
255,255,255,0,
/* bits */
0,8,68,68,0,0,0,0,0,8,68,68,3,48,0,0,0,8,68,68,3,48,0,0,0,8,68,68,0,0,0,0,0,8,81,81,34,34,0,0,0,8,21,21,34,34,0,0,0,8,81,81,34,34,0,0,0,8,21,21,34,34,0,1
};
static void test_decode_rle4(void)
{
IWICBitmapDecoder *decoder, *decoder2;
IWICBitmapFrameDecode *framedecode;
HRESULT hr;
HGLOBAL hbmpdata;
char *bmpdata;
IStream *bmpstream;
DWORD capability=0;
GUID guidresult;
UINT count=0, width=0, height=0;
double dpiX, dpiY;
DWORD imagedata[64] = {1};
const DWORD expected_imagedata[64] = {
0x0000ff,0xffffff,0x0000ff,0xffffff,0xff0000,0xff0000,0xff0000,0xff0000,
0xffffff,0x0000ff,0xffffff,0x0000ff,0xff0000,0xff0000,0xff0000,0xff0000,
0x0000ff,0xffffff,0x0000ff,0xffffff,0xff0000,0xff0000,0xff0000,0xff0000,
0xffffff,0x0000ff,0xffffff,0x0000ff,0xff0000,0xff0000,0xff0000,0xff0000,
0x00ff00,0x00ff00,0x00ff00,0x00ff00,0x000000,0x000000,0x000000,0x000000,
0x00ff00,0x00ff00,0x00ff00,0x00ff00,0x000000,0xff00ff,0xff00ff,0x000000,
0x00ff00,0x00ff00,0x00ff00,0x00ff00,0x000000,0xff00ff,0xff00ff,0x000000,
0x00ff00,0x00ff00,0x00ff00,0x00ff00,0x000000,0x000000,0x000000,0x000000};
WICColor palettedata[6] = {1};
const WICColor expected_palettedata[6] = {
0xff000000,0xff0000ff,0xffff0000,0xffff00ff,0xff00ff00,0xffffffff};
WICRect rc;
hr = CoCreateInstance(&CLSID_WICBmpDecoder, NULL, CLSCTX_INPROC_SERVER,
&IID_IWICBitmapDecoder, (void**)&decoder);
ok(SUCCEEDED(hr), "CoCreateInstance failed, hr=%x\n", hr);
if (!SUCCEEDED(hr)) return;
hbmpdata = GlobalAlloc(GMEM_MOVEABLE, sizeof(testbmp_rle4));
ok(hbmpdata != 0, "GlobalAlloc failed\n");
if (hbmpdata)
{
bmpdata = GlobalLock(hbmpdata);
memcpy(bmpdata, testbmp_rle4, sizeof(testbmp_rle4));
GlobalUnlock(hbmpdata);
hr = CreateStreamOnHGlobal(hbmpdata, FALSE, &bmpstream);
ok(SUCCEEDED(hr), "CreateStreamOnHGlobal failed, hr=%x\n", hr);
if (SUCCEEDED(hr))
{
hr = IWICBitmapDecoder_Initialize(decoder, bmpstream, WICDecodeMetadataCacheOnLoad);
ok(hr == S_OK, "Initialize failed, hr=%x\n", hr);
hr = IWICBitmapDecoder_GetContainerFormat(decoder, &guidresult);
ok(SUCCEEDED(hr), "GetContainerFormat failed, hr=%x\n", hr);
ok(IsEqualGUID(&guidresult, &GUID_ContainerFormatBmp), "unexpected container format\n");
hr = IWICBitmapDecoder_GetFrameCount(decoder, &count);
ok(SUCCEEDED(hr), "GetFrameCount failed, hr=%x\n", hr);
ok(count == 1, "unexpected count %u\n", count);
hr = IWICBitmapDecoder_GetFrame(decoder, 0, &framedecode);
ok(SUCCEEDED(hr), "GetFrame failed, hr=%x\n", hr);
if (SUCCEEDED(hr))
{
IWICImagingFactory *factory;
IWICPalette *palette;
hr = IWICBitmapFrameDecode_GetSize(framedecode, &width, &height);
ok(SUCCEEDED(hr), "GetSize failed, hr=%x\n", hr);
ok(width == 8, "expected width=8, got %u\n", width);
ok(height == 8, "expected height=8, got %u\n", height);
hr = IWICBitmapFrameDecode_GetResolution(framedecode, &dpiX, &dpiY);
ok(SUCCEEDED(hr), "GetResolution failed, hr=%x\n", hr);
ok(fabs(dpiX - 72.0) < 0.01, "expected dpiX=96.0, got %f\n", dpiX);
ok(fabs(dpiY - 72.0) < 0.01, "expected dpiY=96.0, got %f\n", dpiY);
hr = IWICBitmapFrameDecode_GetPixelFormat(framedecode, &guidresult);
ok(SUCCEEDED(hr), "GetPixelFormat failed, hr=%x\n", hr);
ok(IsEqualGUID(&guidresult, &GUID_WICPixelFormat32bppBGR), "unexpected pixel format\n");
hr = CoCreateInstance(&CLSID_WICImagingFactory, NULL, CLSCTX_INPROC_SERVER,
&IID_IWICImagingFactory, (void**)&factory);
ok(SUCCEEDED(hr), "CoCreateInstance failed, hr=%x\n", hr);
if (SUCCEEDED(hr))
{
hr = IWICImagingFactory_CreatePalette(factory, &palette);
ok(SUCCEEDED(hr), "CreatePalette failed, hr=%x\n", hr);
if (SUCCEEDED(hr))
{
hr = IWICBitmapDecoder_CopyPalette(decoder, palette);
ok(hr == WINCODEC_ERR_PALETTEUNAVAILABLE, "expected WINCODEC_ERR_PALETTEUNAVAILABLE, got %x\n", hr);
hr = IWICBitmapFrameDecode_CopyPalette(framedecode, palette);
ok(SUCCEEDED(hr), "CopyPalette failed, hr=%x\n", hr);
hr = IWICPalette_GetColorCount(palette, &count);
ok(SUCCEEDED(hr), "GetColorCount failed, hr=%x\n", hr);
ok(count == 6, "expected count=6, got %u\n", count);
hr = IWICPalette_GetColors(palette, 6, palettedata, &count);
ok(SUCCEEDED(hr), "GetColorCount failed, hr=%x\n", hr);
ok(count == 6, "expected count=6, got %u\n", count);
ok(!memcmp(palettedata, expected_palettedata, sizeof(palettedata)), "unexpected palette data\n");
IWICPalette_Release(palette);
}
IWICImagingFactory_Release(factory);
}
rc.X = 0;
rc.Y = 0;
rc.Width = 8;
rc.Height = 8;
hr = IWICBitmapFrameDecode_CopyPixels(framedecode, &rc, 32, sizeof(imagedata), (BYTE*)imagedata);
ok(SUCCEEDED(hr), "CopyPixels failed, hr=%x\n", hr);
ok(!memcmp(imagedata, expected_imagedata, sizeof(imagedata)), "unexpected image data\n");
IWICBitmapFrameDecode_Release(framedecode);
}
hr = CoCreateInstance(&CLSID_WICBmpDecoder, NULL, CLSCTX_INPROC_SERVER,
&IID_IWICBitmapDecoder, (void**)&decoder2);
ok(SUCCEEDED(hr), "CoCreateInstance failed, hr=%x\n", hr);
if (SUCCEEDED(hr))
{
hr = IWICBitmapDecoder_QueryCapability(decoder2, bmpstream, &capability);
ok(hr == S_OK, "QueryCapability failed, hr=%x\n", hr);
ok(capability == (WICBitmapDecoderCapabilityCanDecodeAllImages),
"unexpected capabilities: %x\n", capability);
}
IStream_Release(bmpstream);
}
GlobalFree(hbmpdata);
}
IWICBitmapDecoder_Release(decoder);
}
START_TEST(bmpformat)
{
CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
@ -729,6 +895,7 @@ START_TEST(bmpformat)
test_decode_1bpp();
test_decode_4bpp();
test_decode_rle8();
test_decode_rle4();
CoUninitialize();
}