new feature: generate short grass texture

src/main/java/mods/betterfoliage/client/BetterFoliageClient.java

@@ -15,6 +15,7 @@ import mods.betterfoliage.client.render.impl.RenderBlockBetterReed;
 import mods.betterfoliage.client.resource.BlockTextureGenerator;
 import mods.betterfoliage.client.resource.HalfTextureResource;
 import mods.betterfoliage.client.resource.LeafTextureGenerator;
+import mods.betterfoliage.client.resource.ShortGrassTextureResource;
 import net.minecraft.block.Block;
 import net.minecraft.client.renderer.texture.TextureAtlasSprite;
 import net.minecraft.client.resources.IResource;
@@ -68,6 +69,12 @@ public class BetterFoliageClient {
 				return new HalfTextureResource(unwrapResource(var1), false, getMissingResource());
 			}
 		});
+		MinecraftForge.EVENT_BUS.register(new BlockTextureGenerator("bf_shortgrass", new ResourceLocation("betterfoliage", "textures/blocks/missing_leaf.png")) {
+			@Override
+			public IResource getResource(ResourceLocation var1) throws IOException {
+				return new ShortGrassTextureResource(unwrapResource(var1), getMissingResource());
+			}
+		});
 
 		MinecraftForge.EVENT_BUS.register(new BetterFoliageClient());
 		

src/main/java/mods/betterfoliage/client/gui/ConfigGuiGrass.java

@@ -9,24 +9,32 @@ import cpw.mods.fml.client.FMLClientHandler;
 
 public class ConfigGuiGrass extends ConfigGuiScreenBase {
 
+	public enum Button {CLOSE, GRASS_USE_GENERATED}
+	
 	public ConfigGuiGrass(GuiScreen parent) {
 		super(parent);
 		int id = 10;
 		widgets.add(new OptionDoubleWidget(BetterFoliage.config.grassSize, -100, -70, 200, 50, id++, id++, "message.betterfoliage.size", "%.2f"));
-		widgets.add(new OptionDoubleWidget(BetterFoliage.config.grassHOffset, -100, -40, 200, 50, id++, id++, "message.betterfoliage.hOffset", "%.3f"));
-		widgets.add(new OptionDoubleWidget(BetterFoliage.config.grassHeightMin, -100, -10, 200, 50, id++, id++, "message.betterfoliage.minHeight", "%.2f"));
-		widgets.add(new OptionDoubleWidget(BetterFoliage.config.grassHeightMax, -100, 20, 200, 50, id++, id++, "message.betterfoliage.maxHeight", "%.2f"));
+		widgets.add(new OptionDoubleWidget(BetterFoliage.config.grassHOffset, -100, -10, 200, 50, id++, id++, "message.betterfoliage.hOffset", "%.3f"));
+		widgets.add(new OptionDoubleWidget(BetterFoliage.config.grassHeightMin, -100, 20, 200, 50, id++, id++, "message.betterfoliage.minHeight", "%.2f"));
+		widgets.add(new OptionDoubleWidget(BetterFoliage.config.grassHeightMax, -100, 50, 200, 50, id++, id++, "message.betterfoliage.maxHeight", "%.2f"));
 	}
 
 	@SuppressWarnings("unchecked")
 	@Override
 	public void addButtons(int x, int y) {
-		buttonList.add(new GuiButton(0, x - 50, y + 50, 100, 20, I18n.format("message.betterfoliage.back")));
+		buttonList.add(new GuiButton(Button.CLOSE.ordinal(), x - 50, y + 80, 100, 20, I18n.format("message.betterfoliage.back")));
+		buttonList.add(new GuiButton(Button.GRASS_USE_GENERATED.ordinal(), x - 100, y - 40, 200, 20, ""));
 	}
 
+	protected void updateButtons() {
+		setButtonOptionBoolean(Button.GRASS_USE_GENERATED.ordinal(), "message.betterfoliage.genShortgrass", BetterFoliage.config.grassUseGenerated);
+	}
+	
 	@Override
 	protected void onButtonPress(int id) {
-		if (id == 0) FMLClientHandler.instance().showGuiScreen(parent);
+		if (id == Button.CLOSE.ordinal()) FMLClientHandler.instance().showGuiScreen(parent);
+		if (id == Button.GRASS_USE_GENERATED.ordinal()) BetterFoliage.config.grassUseGenerated = !BetterFoliage.config.grassUseGenerated;
 		
 		if (BetterFoliage.config.grassHeightMin.value > BetterFoliage.config.grassHeightMax.value) BetterFoliage.config.grassHeightMin.value = BetterFoliage.config.grassHeightMax.value;
 	}

src/main/java/mods/betterfoliage/client/render/impl/RenderBlockBetterGrass.java

@@ -24,7 +24,7 @@ public class RenderBlockBetterGrass extends RenderBlockAOBase implements IRender
 
 	public IconSet grassIcons = new IconSet("bettergrassandleaves", "better_grass_long_%d");
 	public IconSet myceliumIcons = new IconSet("bettergrassandleaves", "better_mycel_%d");
-	
+	public IIcon grassGenIcon;
 	
 	public boolean isBlockAccepted(IBlockAccess blockAccess, int x, int y, int z, Block block, int original) {
 		if (!BetterFoliage.config.grassEnabled) return false;
@@ -45,7 +45,9 @@ public class RenderBlockBetterGrass extends RenderBlockAOBase implements IRender
 		int variation = getSemiRandomFromPos(x, y, z, 0);
 		int heightVariation = getSemiRandomFromPos(x, y, z, 1);
 		
-		IIcon renderIcon = (block == Blocks.mycelium) ? myceliumIcons.get(variation) : grassIcons.get(variation);
+		IIcon renderIcon = (block == Blocks.mycelium) ? 
+				myceliumIcons.get(variation) : 
+				(BetterFoliage.config.grassUseGenerated ? grassGenIcon : grassIcons.get(variation));
 		if (renderIcon == null) return true;
 		
 		double scale = BetterFoliage.config.grassSize.value * 0.5;
@@ -65,6 +67,7 @@ public class RenderBlockBetterGrass extends RenderBlockAOBase implements IRender
 		
 		grassIcons.registerIcons(event.map);
 		myceliumIcons.registerIcons(event.map);
+		grassGenIcon = event.map.registerIcon("bf_shortgrass:minecraft:tallgrass");
 		BetterFoliage.log.info(String.format("Found %d short grass textures", grassIcons.numLoaded));
 		BetterFoliage.log.info(String.format("Found %d mycelium textures", myceliumIcons.numLoaded));
 	}

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;
+	}
+
+}

src/main/java/mods/betterfoliage/common/config/BetterFoliageConfig.java

@@ -11,6 +11,9 @@ public class BetterFoliageConfig extends ConfigBase {
 	@CfgElement(category="grass", key="enabled")
 	public boolean grassEnabled = true;
 	
+	@CfgElement(category="grass", key="useGenerated")
+	public boolean grassUseGenerated = false;
+	
 	@CfgElement(category="cactus", key="enabled")
 	public boolean cactusEnabled = true;
 	

src/main/resources/assets/betterfoliage/lang/en_US.lang

@@ -21,6 +21,7 @@ message.betterfoliage.maxHeight=Max.Height
 message.betterfoliage.flowerChance=Flower Chance
 message.betterfoliage.reedChance=Reed Chance
 message.betterfoliage.leavesMode=Leaves Offset: %s
+message.betterfoliage.genShortgrass=Use generated: %s
 message.betterfoliage.leavesSkew=Skew
 message.betterfoliage.leavesTranslate=Translate
 message.betterfoliage.algaeChance=Algae Chance