BOOL ReadImage(CImage* pcImage, char* szFilename, EImageType eType)
{
if (eType == IT_Unknown)
{
eType = GuessImageType(szFilename);
}
//Oi! Check to make sure none of the below expect an initialised image.
switch (eType)
{
case IT_BMP:
case IT_EMF:
case IT_GIF:
case IT_ICO:
case IT_JPG:
case IT_WMF:
// uses OLE and IPicture to load these image formats.
return (LoadPictureIPicture(pcImage, szFilename));
case IT_TGA:
return (LoadTGA(pcImage, szFilename)); // uses NeHe TGA routines.
case IT_PNG:
return (LoadPNG(pcImage, szFilename));
case IT_RAD:
return (LoadRAD(pcImage, szFilename)); // uses a text-format RAW descriptor (RAD) file to load a raw file.
case IT_RAW:
return (LoadRAW(pcImage, szFilename)); // special case assuming an initialised image.
}
return FALSE;
}
Image* TGAImageDecoder::Decode(DataStream* ds) {
TGAHeader header;
if (!LoadHeader(&header, ds)) return 0;
ImageFormat fmt = IMAGE_FORMAT_UNKNOWN;
if (header.bitsperpixel==32)
fmt = IMAGE_FORMAT_RGBA;
else if(header.bitsperpixel==24)
fmt = IMAGE_FORMAT_RGB;
else if (header.bitsperpixel==8)
fmt = IMAGE_FORMAT_GRAY;
bool rle = (header.datatypecode & 8)!=0;
UInt32 width = header.width;
UInt32 height = header.height;
ImageImpl* img = new ImageImpl(width,height,fmt);
bool res = rle ? LoadRLE(ds,img) : LoadRAW(ds,img);
if (!res) {
delete img;
img = 0;
} else {
img->SwapChannelsRB();
if ( (header.imagedescriptor & 0x20 ) == 0) {
img->FlipV();
}
}
return img;
}
