-// Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
+// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
package org.xwt;
/**
*/
public abstract class PixelBuffer {
- // FIXME: try to remove
- /** returns the height of the PixelBuffer */
- public abstract int getHeight();
-
- // FIXME: try to remove
- /** returns the width of the PixelBuffer */
- public abstract int getWidth();
-
-
-
- /** Draw the region of source within s onto the region d on this PixelBuffer, scaling as needed */
- public abstract void drawPicture(Picture source, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2);
+ /** draw the picture at (dx1, dy1), cropping to (cx1, cy1, cx2, cy2) */
+ protected abstract void drawPicture(Picture source, int dx1, int dy1, int cx1, int cy1, int cx2, int cy2);
/** fill a trapezoid whose top and bottom edges are horizontal */
public abstract void fillTrapezoid(int x1, int x2, int y1, int x3, int x4, int y2, int color);
- // FIXME: we want floats (inter-pixel spacing) for antialiasing, but this hoses the fastpath line drawing... argh!
+ /**
+ * Same as drawPicture, but only uses the alpha channel of the Picture, and is allowed to destructively modify the RGB
+ * channels of the Picture in the process. This method may assume that the RGB channels of the image are all zero IFF it
+ * restores this invariant before returning.
+ */
+ public abstract void drawGlyph(Font.Glyph source, int dx1, int dy1, int cx1, int cy1, int cx2, int cy2, int rgb);
+
+ // FEATURE: we want floats (inter-pixel spacing) for antialiasing, but this hoses the fastpath line drawing... argh!
/** draws a line of width <tt>w</tt>; note that the coordinates here are <i>post-transform</i> */
public void drawLine(int x1, int y1, int x2, int y2, int w, int color, boolean capped) {
if (y1 > y2) { int t = x1; x1 = x2; x2 = t; t = y1; y1 = y2; y2 = t; }
if (x1 == x2) {
- fillTrapezoid(x1 - w / 2, x2 + w / 2, y1 - (capped ? w / 2 : 0), x1 - w / 2, x2 + w / 2, y2 + (capped ? w / 2 : 0), color);
+ fillTrapezoid(x1 - w / 2, x2 + w / 2, y1 - (capped ? w / 2 : 0),
+ x1 - w / 2, x2 + w / 2, y2 + (capped ? w / 2 : 0), color);
return;
}