Exemplos de ReadStreamHandle::read_whole_block em C++ (Cpp)

Exemplo n.º 1

Arquivo: mptr_bmp.cpp Projeto: BakaMANIA/synfig

bool
bmp_mptr::get_frame(synfig::Surface &surface, const synfig::RendDesc &/*renddesc*/, Time /*time*/, synfig::ProgressCallback *cb)
{
	FileSystem::ReadStreamHandle stream = identifier.get_read_stream();
	if(!stream)
	{
		if(cb)cb->error("bmp_mptr::GetFrame(): "+strprintf(_("Unable to open %s"),identifier.filename.c_str()));
		else synfig::error("bmp_mptr::GetFrame(): "+strprintf(_("Unable to open %s"),identifier.filename.c_str()));
		return false;
	}

	synfig::BITMAP::FILEHEADER fileheader;
	synfig::BITMAP::INFOHEADER infoheader;

	if (!stream->read_variable(fileheader.bfType)
	 || fileheader.bfType[0] != 'B'
	 || fileheader.bfType[1] != 'M')
	{
		if(cb)cb->error("bmp_mptr::GetFrame(): "+strprintf(_("%s is not in BMP format"),identifier.filename.c_str()));
		else synfig::error("bmp_mptr::GetFrame(): "+strprintf(_("%s is not in BMP format"),identifier.filename.c_str()));
		return false;
	}

	if(!stream->read_whole_block(&fileheader.bfSize, sizeof(synfig::BITMAP::FILEHEADER)-2))
	{
		String str("bmp_mptr::get_frame(): "+strprintf(_("Failure while reading BITMAP::FILEHEADER from %s"),identifier.filename.c_str()));
		if(cb)cb->error(str);
		else synfig::error(str);
		return false;
	}

	if(!stream->read_whole_block(&infoheader, sizeof(synfig::BITMAP::INFOHEADER)))
	{
		String str("bmp_mptr::get_frame(): "+strprintf(_("Failure while reading BITMAP::INFOHEADER from %s"),identifier.filename.c_str()));
		if(cb)cb->error(str);
		else synfig::error(str);
		return false;
	}

	int offset=little_endian(fileheader.bfOffsetBits);

	if(offset!=sizeof(synfig::BITMAP::FILEHEADER)+sizeof(synfig::BITMAP::INFOHEADER))
	{
		String str("bmp_mptr::get_frame(): "+strprintf(_("Bad BITMAP::FILEHEADER in %s. (bfOffsetBits=%d, should be %d)"),identifier.filename.c_str(),offset,sizeof(synfig::BITMAP::FILEHEADER)+sizeof(synfig::BITMAP::INFOHEADER)));
		if(cb)cb->error(str);
		else synfig::error(str);
		return false;
	}

	if(little_endian(infoheader.biSize)!=sizeof(synfig::BITMAP::INFOHEADER))
	{
		String str("bmp_mptr::get_frame(): "+strprintf(_("Bad BITMAP::INFOHEADER in %s. (biSize=%d, should be %d)"),identifier.filename.c_str(),little_endian(infoheader.biSize),sizeof(synfig::BITMAP::INFOHEADER)));
		if(cb)cb->error(str);
		else synfig::error(str);
		return false;
	}

	int w,h,bit_count;

	w=little_endian(infoheader.biWidth);
	h=little_endian(infoheader.biHeight);
	bit_count=little_endian_short(infoheader.biBitCount);

	synfig::warning("w:%d\n",w);
	synfig::warning("h:%d\n",h);
	synfig::warning("bit_count:%d\n",bit_count);

	if(little_endian(infoheader.biCompression))
	{
		if(cb)cb->error("bmp_mptr::GetFrame(): "+string(_("Reading compressed bitmaps is not supported")));
		else synfig::error("bmp_mptr::GetFrame(): "+string(_("Reading compressed bitmaps is not supported")));
		return false;
	}

	if(bit_count!=24 && bit_count!=32)
	{
		if(cb)cb->error("bmp_mptr::GetFrame(): "+strprintf(_("Unsupported bit depth (bit_count=%d, should be 24 or 32)"),bit_count));
		else synfig::error("bmp_mptr::GetFrame(): "+strprintf(_("Unsupported bit depth (bit_count=%d, should be 24 or 32)"),bit_count));
		return false;
	}

	int x;
	int y;
	surface.set_wh(w,h);
	for(y=0;y<surface.get_h();y++)
		for(x=0;x<surface.get_w();x++)
		{
//			float b=(float)(unsigned char)stream->getc()*(1.0/255.0);
//			float g=(float)(unsigned char)stream->getc()*(1.0/255.0);
//			float r=(float)(unsigned char)stream->getc()*(1.0/255.0);
			float b=gamma().b_U8_to_F32((unsigned char)stream->get());
			float g=gamma().g_U8_to_F32((unsigned char)stream->get());
			float r=gamma().r_U8_to_F32((unsigned char)stream->get());

			surface[h-y-1][x]=Color(
				r,
				g,
				b,
				1.0
			);
			if(bit_count==32)
				stream->get();
		}


	return true;
}