Example #1
0
		public static unsafe Bitmap ExtractThumb(IniFile map) {
			var prevSection = map.GetSection("Preview");
			var size = prevSection.ReadString("Size").Split(',');
			var previewSize = new Rectangle(int.Parse(size[0]), int.Parse(size[1]), int.Parse(size[2]), int.Parse(size[3]));
			var preview = new Bitmap(previewSize.Width, previewSize.Height, PixelFormat.Format24bppRgb);

			byte[] image = new byte[preview.Width * preview.Height * 3];
			var prevDataSection = map.GetSection("PreviewPack");
			var image_compressed = Convert.FromBase64String(prevDataSection.ConcatenatedValues());
			Format5.DecodeInto(image_compressed, image, 5);

			// invert rgb->bgr
			BitmapData bmd = preview.LockBits(new Rectangle(0, 0, preview.Width, preview.Height), ImageLockMode.WriteOnly, PixelFormat.Format24bppRgb);
			int idx = 0;
			for (int y = 0; y < bmd.Height; y++) {
				byte* row = (byte*)bmd.Scan0 + bmd.Stride * y;
				byte* p = row;
				for (int x = 0; x < bmd.Width; x++) {
					byte b = image[idx++];
					byte g = image[idx++];
					byte r = image[idx++];
					*p++ = r;
					*p++ = g;
					*p++ = b;
				}
			}

			preview.UnlockBits(bmd);
			return preview;
		}