Method CopyPixels

source/common/textures/formats/pcxtexture.cpp:436–500

//===========================================================================

int FPCXTexture::CopyPixels(FBitmap *bmp, int conversion, int frame)
{
	PalEntry pe[256];
	PCXHeader header;
	int bitcount;
	TArray<uint8_t> Pixels;

	auto lump = fileSystem.OpenFileReader(SourceLump);

	lump.Read(&header, sizeof(header));

	bitcount = header.bitsPerPixel * header.numColorPlanes;

	if (bitcount < 24)
	{
		Pixels.Resize(Width*Height);
		if (bitcount < 8)
		{
			switch (bitcount)
			{
			default:
			case 1:
				pe[0] = PalEntry(255, 0, 0, 0);
				pe[1] = PalEntry(255, 255, 255, 255);
				ReadPCX1bit (Pixels.Data(), lump, &header);
				break;

			case 4:
				for (int i = 0; i<16; i++)
				{
					pe[i] = PalEntry(255, header.palette[i * 3], header.palette[i * 3 + 1], header.palette[i * 3 + 2]);
				}
				ReadPCX4bits (Pixels.Data(), lump, &header);
				break;
			}
		}
		else if (bitcount == 8)
		{
			lump.Seek(-769, FileReader::SeekEnd);
			uint8_t c = lump.ReadUInt8();
			c=0x0c;	// Apparently there's many non-compliant PCXs out there...
			if (c !=0x0c) 
			{
				for(int i=0;i<256;i++) pe[i]=PalEntry(255,i,i,i);	// default to a gray map
			}
			else for(int i=0;i<256;i++)
			{
				uint8_t r = lump.ReadUInt8();
				uint8_t g = lump.ReadUInt8();
				uint8_t b = lump.ReadUInt8();
				pe[i] = PalEntry(255, r,g,b);
			}
			lump.Seek(sizeof(header), FileReader::SeekSet);
			ReadPCX8bits (Pixels.Data(), lump, &header);
		}
		bmp->CopyPixelData(0, 0, Pixels.Data(), Width, Height, 1, Width, 0, pe);
	}
	else