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Modifications to get scrolling working again. It's a bit smoother, but

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we can do better.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1026 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
2002-02-19 01:42:28 +00:00
parent 68823a9f8a
commit 3125782a15
1 changed files with 23 additions and 8 deletions
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src/java/com/threerings/media/animation/AnimatedPanel.java
+23 -8
View File
@@ -1,5 +1,5 @@
//
// $Id: AnimatedPanel.java,v 1.9 2002/02/19 01:23:56 mdb Exp $
// $Id: AnimatedPanel.java,v 1.10 2002/02/19 01:42:28 mdb Exp $
package com.threerings.media.animation;
@@ -208,6 +208,7 @@ public class AnimatedPanel extends Canvas implements AnimatedView
createBackBuffer(gc);
}
int width = getWidth(), height = getHeight();
Graphics g = null;
try {
g = _backimg.getGraphics();
@@ -216,14 +217,8 @@ public class AnimatedPanel extends Canvas implements AnimatedView
// business rather than just the dirty parts
if (valres != VolatileImage.IMAGE_OK) {
invalidRects.clear();
invalidRects.add(new Rectangle(
0, 0, getWidth(), getHeight()));
invalidRects.add(new Rectangle(0, 0, width, height));
Log.info("Lost back buffer, redrawing.");
} else if (_stime != 0) {
// if it was OK, we may need to do some scrolling
Dimension size = getSize();
g.copyArea(0, 0, size.width, size.height, -dx, -dy);
}
// now do our actual rendering
@@ -237,6 +232,26 @@ public class AnimatedPanel extends Canvas implements AnimatedView
try {
g = getGraphics();
// do any scrolling that we need to do
if (_stime != 0) {
// if it was OK, we may need to do some scrolling
g.copyArea(0, 0, width, height, -dx, -dy);
// and add invalid rectangles for the exposed areas
if (dx > 0) {
invalidRects.add(
new Rectangle(width - dx, 0, dx, height));
} else if (dx < 0) {
invalidRects.add(new Rectangle(0, 0, dx, height));
}
if (dy > 0) {
invalidRects.add(
new Rectangle(0, height - dy, width, dy));
} else if (dy < 0) {
invalidRects.add(new Rectangle(0, 0, width, dy));
}
}
// iterate through the invalid rectangles, copying those
// areas from the back buffer to the display
int isize = invalidRects.size();