Implement simple translation at JSGraphics2D.drawImage().

zakki · zakki · commit d6c3571c4fe6 · 2018-12-13T15:33:50.000+09:00
CanvasRenderingContext2D.putImageData() isn't affected by the canvas transformation matrix.
diff --git a/sources/net.sf.j2s.java.core/src/swingjs/JSGraphics2D.java b/sources/net.sf.j2s.java.core/src/swingjs/JSGraphics2D.java
@@ -533,6 +533,12 @@ private void drawDirect(int[] pixels, int x, int y, int width, int height, boole
 			nx = width;
 			ny = height;
 		}
+		double[] m = new double[6];
+		transform.getMatrix(m);
+		if (m[0] != 1 || m[1] != 0 || m[2] != 0 || m[3] != 1)
+			System.err.println("Unsupported transform");
+		x += m[4];
+		y += m[5];
 		for (int pt = 0, i = 0, n = Math.min(buf8.length / 4, pixels.length); i < n; i++) {
 			int argb = pixels[i];
 			buf8[pt++] = (argb >> 16) & 0xFF;
