Legacy ImageMagick Discussions Archive

Code: Select all

A simplier solution may be to just subtract the top-left corner of from all the coordinates of the lines, but then many lines may be outside the image area, and I am not certain just how valid that is, or how other programs will reach to things like negative coordinates, or other out pf range coordinates.

Code: Select all

	private static void findAndTranslatePaths(byte[] b, int n, int lgd, Dimension beforeCropDimension, Rectangle croppedRectangle) {
		int slutN = n + lgd;
		while (n < slutN) {
			if (b[n] == '8' && b[++n] == 'B' && b[++n] == 'I' && b[++n] == 'M') {
				int ID = (0xff & b[++n]) * 256 + (0xff & b[++n]);
				byte count = b[++n];
				++n;
				String path_name = new String(b,n,count);
				n += count;

				if (count % 2 == 1) n--; //XXX NEW

				int str = (((0xff & b[++n]) * 256 + (0xff & b[++n])) * 256 + (0xff & b[++n])) * 256 + (0xff & b[++n]);
				n++;
				if (ID>=2000 && ID<=2998) {
					translatePath(b,n,str, beforeCropDimension, croppedRectangle);
				}

				n = n + str; if (str%2==1) n++;
			} else {
				n++;
			}
		}
	}

Code: Select all

	private static void translatePath(byte[] b, int ofs, int str, Dimension beforeCropDimension, Rectangle croppedRectangle) {
		for (int i=0; i<str; i+=26) {
			int n = ofs+i;
			int selector = (0xff & b[++n]) + (0xff & b[++n]) * 256;


			switch (selector)
			{
				case 1:
				case 2:
				case 4:
				case 5:
					/*
						Sub-path knot
					 */
					for (int j = 0; j < 3; j++) {
						int y = ReadPropertyMSBLong(b, n); // read coordinate
						double dy = (double) y * beforeCropDimension.height / 4096 / 4096; // scale down
						double dy2 = dy - croppedRectangle.y; // translate origin
						double afterCropDimension_height = croppedRectangle.getHeight();
						int y2 = (int )(((dy2  * 4096 * 4096) + 0.5)/afterCropDimension_height); // scale up
						WritePropertyMSBLong(b,n,y2); // write back

						n+=4;

						int x = ReadPropertyMSBLong(b, n);
						double dx = (double) x * beforeCropDimension.width / 4096 / 4096; // scale down
						double dx2 = dx - croppedRectangle.x; // translate origin
						double afterCropDimension_width = croppedRectangle.getWidth();
						int x2 = (int )(((dx2  * 4096 * 4096) + 0.5)/afterCropDimension_width); // scale up
						WritePropertyMSBLong(b,n,x2); // write back

						n+=4;
					}
					break;
				case 0:
				case 3:
					break;
				default:
			}
		}
	}

Code: Select all

				if (count % 2 == 1) n--; //XXX NEW