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remove zero delay frames from the final result before returning

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Gered 2014-04-03 18:37:40 -04:00
parent d99c864402
commit 45ed101fef
1 changed files with 13 additions and 7 deletions
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20
src/java/clj_image2ascii/java/AnimatedGif.java
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@ -12,6 +12,7 @@ import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Iterator;
import java.util.LinkedList;
/**
@ -97,13 +98,8 @@ public class AnimatedGif {
IIOMetadataNode root = (IIOMetadataNode)frameMetadata.getAsTree(frameMetadata.getNativeMetadataFormatName());
IIOMetadataNode gce = (IIOMetadataNode)root.getElementsByTagName("GraphicControlExtension").item(0);
// delay specified as 1/100 of a second (*10 to get in milliseconds).
// TODO: zero delay frames are meant as intermediate frames to "prepare" the canvas for the following
// frames (i guess as a way to clear/fill the background for a bunch of upcoming frames which
// don't fill the entire canvas?). we probably *do* need to add these (temporarily) to the frames
// array so that we guarantee proper disposal method handling, but the final array we return from
// this method probably should not include them
// More info: http://www.imagemagick.org/Usage/anim_basics/#zero
// delay specified as 1/100 of a second (*10 to get in milliseconds). we handle the special zero case
// after the loop is done, for now treat them as any other frame
int delay = Integer.valueOf(gce.getAttribute("delayTime"));
String disposal = gce.getAttribute("disposalMethod");
@ -164,6 +160,16 @@ public class AnimatedGif {
reader.dispose();
// remove zero-delay frames, which are just intermediate frames to "prep" the canvas for subsequent frames
// (i guess as a way to clear/fill the background for a bunch of upcoming frames which don't fill the entire
// canvas? anyway, we don't need them anymore as they aren't meant to be displayed)
// More info: http://www.imagemagick.org/Usage/anim_basics/#zero
Iterator<ImageFrame> itor = frames.iterator();
while (itor.hasNext()) {
if (itor.next().delay == 0)
itor.remove();
}
return frames;
}
}