new feature: generate short grass texture

src/main/java/mods/betterfoliage/client/resource/ShortGrassTextureResource.java

@@ -0,0 +1,65 @@
+package mods.betterfoliage.client.resource;
+
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+
+import javax.imageio.ImageIO;
+
+import mods.betterfoliage.BetterFoliage;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.resources.IResource;
+import net.minecraft.client.resources.IResourceManager;
+import net.minecraft.client.resources.data.IMetadataSection;
+import net.minecraft.util.ResourceLocation;
+
+public class ShortGrassTextureResource implements IResource {
+
+	/** Raw PNG data*/
+	public byte[] data = null;
+	
+	/** Resource to return if generation fails */
+	public IResource fallbackResource;
+	
+	public ShortGrassTextureResource(ResourceLocation resource, IResource fallbackResource) {
+		this.fallbackResource = fallbackResource;
+		
+		IResourceManager resourceManager = Minecraft.getMinecraft().getResourceManager();
+		try {
+			// load full texture
+			ResourceLocation origResource = new ResourceLocation(resource.getResourceDomain(), "textures/blocks/" + resource.getResourcePath());
+			BufferedImage origImage = ImageIO.read(resourceManager.getResource(origResource).getInputStream());
+
+			// draw bottom half of texture
+			BufferedImage result = new BufferedImage(origImage.getWidth(), origImage.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);
+			Graphics2D graphics = result.createGraphics();
+			graphics.drawImage(origImage, 0, origImage.getHeight() / 2, null);
+
+			// create PNG image
+			ByteArrayOutputStream baos = new ByteArrayOutputStream();
+			ImageIO.write(result, "PNG", baos);
+			data = baos.toByteArray();
+		} catch (Exception e) {
+			// stop log spam with GLSL installed
+			BetterFoliage.log.info(String.format("Could not load texture: %s, exception: %s", resource.toString(), e.getClass().getSimpleName()));
+		}
+	}
+
+	@Override
+	public InputStream getInputStream() {
+		return data != null ? new ByteArrayInputStream(data) : fallbackResource.getInputStream();
+	}
+
+	@Override
+	public boolean hasMetadata() {
+		return false;
+	}
+
+	@Override
+	public IMetadataSection getMetadata(String var1) {
+		return null;
+	}
+
+}