first code commit

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

@@ -0,0 +1,114 @@
+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.IOException;
+import java.io.InputStream;
+import java.util.Map;
+
+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;
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+
+/** {@link IResource} containing an autogenerated round crossleaf texture
+ * @author octarine-noise
+ */
+@SideOnly(Side.CLIENT)
+public class LeafTextureResource implements IResource {
+
+	/** Raw PNG data*/
+	protected byte[] data = null;
+	
+	/** Name of the default alpha mask to use */
+	public static String defaultMask = "rough";
+	
+	public LeafTextureResource(ResourceLocation resLeaf, Map<String, String> maskMappings) {
+		IResourceManager resourceManager = Minecraft.getMinecraft().getResourceManager();
+		try {
+			// load normal leaf texture
+			ResourceLocation origResource = new ResourceLocation(resLeaf.getResourceDomain(), "textures/blocks/" + resLeaf.getResourcePath());
+			BufferedImage origImage = ImageIO.read(resourceManager.getResource(origResource).getInputStream());
+			if (origImage.getWidth() != origImage.getHeight()) return;
+			int size = origImage.getWidth();
+
+			// load alpha mask of appropriate size
+			String maskType = defaultMask;
+			for(Map.Entry<String, String> entry : maskMappings.entrySet()) if (resLeaf.getResourcePath().contains(entry.getKey())) {
+				maskType = entry.getValue();
+				break;
+			}
+			BufferedImage maskImage = loadLeafMaskImage(maskType, size * 2);
+			int scale = size * 2 / maskImage.getWidth();
+			
+			// tile leaf texture 2x2
+			BufferedImage overlayIcon = new BufferedImage(size * 2, size * 2, BufferedImage.TYPE_4BYTE_ABGR);
+			Graphics2D graphics = overlayIcon.createGraphics();
+			graphics.drawImage(origImage, 0, 0, null);
+			graphics.drawImage(origImage, 0, size, null);
+			graphics.drawImage(origImage, size, 0, null);
+			graphics.drawImage(origImage, size, size, null);
+			
+			// overlay mask alpha on texture
+			for (int x = 0; x < overlayIcon.getWidth(); x++) {
+				for (int y = 0; y < overlayIcon.getHeight(); y++) {
+					long origPixel = overlayIcon.getRGB(x, y) & 0xFFFFFFFFl;
+					long maskPixel = maskImage.getRGB(x / scale, y / scale) & 0xFF000000l | 0x00FFFFFF;
+					overlayIcon.setRGB(x, y, (int) (origPixel & maskPixel));
+				}
+			}
+
+			// create PNG image
+			ByteArrayOutputStream baos = new ByteArrayOutputStream();
+			ImageIO.write(overlayIcon, "PNG", baos);
+			data = baos.toByteArray();
+		} catch (Exception e) {
+			BetterFoliage.log.info(String.format("Could not create leaf texture: %s, exception: %s", resLeaf.toString(), e.getClass().getSimpleName()));
+		}
+	}
+	
+	/** Loads the alpha mask of the given type and size. If a mask of the exact size can not be found,
+	 *  will try to load progressively smaller masks down to 16x16
+	 * @param type mask type
+	 * @param size texture size
+	 * @return alpha mask
+	 */
+	protected BufferedImage loadLeafMaskImage(String type, int size) {
+		IResourceManager resourceManager = Minecraft.getMinecraft().getResourceManager();
+		IResource maskResource = null;
+		
+		while (maskResource == null && size >= 16) {
+			try {
+				maskResource = resourceManager.getResource(new ResourceLocation(String.format("betterfoliage:textures/blocks/leafmask_%d_%s.png", size, type)));
+			} catch (Exception e) {}
+			size /= 2;
+		}
+		
+		try {
+			return maskResource == null ? null : ImageIO.read(maskResource.getInputStream());
+		} catch (IOException e) {
+			return null;
+		}
+	}
+	
+	public InputStream getInputStream() {
+		return data != null ? new ByteArrayInputStream(data) : null;
+	}
+
+	public boolean hasMetadata() {
+		return false;
+	}
+
+	public IMetadataSection getMetadata(String var1) {
+		return null;
+	}
+
+}