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client: add BufferedImage -> IndexedSprite converter to ImageUtil

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Lotto
2019-05-12 01:43:19 +02:00
parent 869fa9d93d
commit 1cd1bbb005
1 changed files with 74 additions and 0 deletions
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74
runelite-client/src/main/java/net/runelite/client/util/ImageUtil.java
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@@ -24,6 +24,7 @@
*/
package net.runelite.client.util;
import com.google.common.primitives.Ints;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
@@ -34,12 +35,15 @@ import java.awt.image.DirectColorModel;
import java.awt.image.PixelGrabber;
import java.awt.image.RescaleOp;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.imageio.ImageIO;
import javax.swing.GrayFilter;
import java.util.function.Predicate;
import lombok.extern.slf4j.Slf4j;
import net.runelite.api.Client;
import net.runelite.api.IndexedSprite;
import net.runelite.api.SpritePixels;
/**
@@ -448,4 +452,74 @@ public class ImageUtil
return client.createSpritePixels(pixels, image.getWidth(), image.getHeight());
}
/**
* Converts an image into an {@code IndexedSprite} instance.
*
* The passed in image can only have at max 255 different colors.
*
* @param image The image to be converted
* @param client Current client instance
* @return The image as an {@code IndexedSprite}
*/
public static IndexedSprite getImageIndexedSprite(BufferedImage image, Client client)
{
final byte[] pixels = new byte[image.getWidth() * image.getHeight()];
final List<Integer> palette = new ArrayList<>();
/*
When drawing the indexed sprite, palette idx 0 is seen as fully transparent,
so pad the palette out so that our colors start at idx 1.
*/
palette.add(0);
final int[] sourcePixels = image.getRGB(0, 0,
image.getWidth(), image.getHeight(),
null, 0, image.getWidth());
/*
Build a color palette and assign the pixels to positions in the palette.
*/
for (int j = 0; j < sourcePixels.length; j++)
{
final int argb = sourcePixels[j];
final int a = (argb >> 24) & 0xFF;
final int rgb = argb & 0xFF_FF_FF;
// Default to not drawing the pixel.
int paletteIdx = 0;
// If the pixel is fully opaque, draw it.
if (a == 0xFF)
{
paletteIdx = palette.indexOf(rgb);
if (paletteIdx == -1)
{
paletteIdx = palette.size();
palette.add(rgb);
}
}
pixels[j] = (byte) paletteIdx;
}
if (palette.size() > 256)
{
throw new RuntimeException("Passed in image had " + (palette.size() - 1)
+ " different colors, exceeding the max of 255.");
}
final IndexedSprite sprite = client.createIndexedSprite();
sprite.setPixels(pixels);
sprite.setPalette(Ints.toArray(palette));
sprite.setWidth(image.getWidth());
sprite.setHeight(image.getHeight());
sprite.setOriginalWidth(image.getWidth());
sprite.setOriginalHeight(image.getHeight());
sprite.setOffsetX(0);
sprite.setOffsetY(0);
return sprite;
}
}