Refactored texture loading system to allow runtime editing and atlases

- Removed TextureManager, use TextureLoader instead
  - Removed PngLoader, AWT image compat moved to TextureUtils
- Pixels renamed to TextureData
- Added TextureDataEditor for runtime editing of TextureData
- Added SimpleTextures to load random, one-off textures
- Added Atlases to load textures into runtime-compiled atlases
  - BlockRenders now contains a method to load a block texture properly
- Moved block textures into assets/textures/blocks/

src/main/java/ru/windcorp/progressia/client/ClientProxy.java

@@ -24,8 +24,10 @@ import ru.windcorp.progressia.client.graphics.backend.RenderTaskQueue;
 import ru.windcorp.progressia.client.graphics.flat.FlatRenderProgram;
 import ru.windcorp.progressia.client.graphics.flat.LayerTestUI;
 import ru.windcorp.progressia.client.graphics.gui.LayerTestGUI;
+import ru.windcorp.progressia.client.graphics.texture.Atlases;
 import ru.windcorp.progressia.client.graphics.world.LayerWorld;
 import ru.windcorp.progressia.client.graphics.world.WorldRenderProgram;
+import ru.windcorp.progressia.client.world.renders.BlockRenders;
 
 public class ClientProxy implements Proxy {
 
@@ -40,6 +42,9 @@ public class ClientProxy implements Proxy {
 			e.printStackTrace();
 		}
 		
+		BlockRenders.registerTest();
+		Atlases.loadAllAtlases();
+		
 		GUI.addBottomLayer(new LayerWorld());
 		GUI.addTopLayer(new LayerTestUI());
 		GUI.addTopLayer(new LayerTestGUI());

src/main/java/ru/windcorp/progressia/client/graphics/flat/LayerTestUI.java

@@ -27,11 +27,8 @@ import ru.windcorp.progressia.client.graphics.backend.GraphicsInterface;
 import ru.windcorp.progressia.client.graphics.input.KeyEvent;
 import ru.windcorp.progressia.client.graphics.input.bus.Input;
 import ru.windcorp.progressia.client.graphics.model.LambdaModel;
-import ru.windcorp.progressia.client.graphics.texture.SimpleTexture;
-import ru.windcorp.progressia.client.graphics.texture.Sprite;
+import ru.windcorp.progressia.client.graphics.texture.SimpleTextures;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.client.graphics.texture.TextureManager;
-import ru.windcorp.progressia.client.graphics.texture.TextureSettings;
 import ru.windcorp.progressia.client.graphics.world.LayerWorld;
 
 public class LayerTestUI extends AssembledFlatLayer {
@@ -67,8 +64,8 @@ public class LayerTestUI extends AssembledFlatLayer {
 		
 		target.pushTransform(new Mat4().identity().translate(x + 2*BORDER, y + 2*BORDER, 0));
 		
-		final Texture compassBg = qtex("compass_icon");
-		final Texture compassFg = qtex("compass_icon_arrow");
+		final Texture compassBg = SimpleTextures.get("compass_icon");
+		final Texture compassFg = SimpleTextures.get("compass_icon_arrow");
 		
 		target.drawTexture(texShadow, texShadow, texSize, texSize, Colors.BLACK, compassBg);
 		target.drawTexture(0, 0, texSize, texSize, compassBg);
@@ -143,17 +140,4 @@ public class LayerTestUI extends AssembledFlatLayer {
 		invalidate();
 	}
 
-	/*
-	 * TMP texture loader
-	 */
-	
-	private static final TextureSettings TEXTURE_SETTINGS =
-			new TextureSettings(false);
-	
-	private static Texture qtex(String name) {
-		return new SimpleTexture(new Sprite(
-				TextureManager.load(name, TEXTURE_SETTINGS)
-		));
-	}
-
 }

src/main/java/ru/windcorp/progressia/client/graphics/texture/Atlases.java

@@ -0,0 +1,211 @@
+package ru.windcorp.progressia.client.graphics.texture;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.google.common.collect.Multimap;
+import com.google.common.collect.MultimapBuilder;
+
+import glm.vec._2.Vec2;
+import ru.windcorp.progressia.client.graphics.backend.RenderTaskQueue;
+import ru.windcorp.progressia.common.resource.Resource;
+import ru.windcorp.progressia.common.util.BinUtil;
+import ru.windcorp.progressia.common.util.Named;
+
+public class Atlases {
+	
+	public static class AtlasGroup extends Named {
+		private final int atlasSize;
+		
+		public AtlasGroup(String name, int atlasSize) {
+			super(name);
+			this.atlasSize = atlasSize;
+			
+			if (!BinUtil.isPowerOf2(atlasSize)) {
+				throw new IllegalArgumentException(
+						"Atlas size " + atlasSize
+						+ " is not a power of 2"
+				);
+			}
+		}
+		
+		public int getAtlasSize() {
+			return atlasSize;
+		}
+		
+		@Override
+		public int hashCode() {
+			return super.hashCode();
+		}
+		
+		@Override
+		public boolean equals(Object obj) {
+			return super.equals(obj);
+		}
+	}
+	
+	public static class Atlas {
+		private final AtlasGroup group;
+		
+		private final TextureDataEditor editor;
+		private int nextX, nextY;
+		private int rowHeight;
+		
+		private final TexturePrimitive primitive;
+		
+		public Atlas(AtlasGroup group) {
+			this.group = group;
+			int size = group.getAtlasSize();
+			
+			this.editor = new TextureDataEditor(size, size, size, size, SETTINGS);
+			this.primitive = new TexturePrimitive(editor.createSnapshot());
+		}
+		
+		public Sprite addSprite(TextureDataEditor data) {
+			int width = data.getContentWidth();
+			int height = data.getContentHeight();
+			
+			selectPosition(width, height);
+			
+			editor.draw(data, nextX, nextY);
+			
+			Sprite result = new Sprite(
+					getPrimitive(),
+					toPrimitiveCoords(nextX, nextY),
+					toPrimitiveCoords(width, height)
+			);
+			
+			nextX += width;
+			
+			return result;
+		}
+
+		private void selectPosition(int width, int height) {
+			if (nextX + width > getSize()) {
+				// Wrapping
+				nextY += rowHeight; // Move to next row
+				rowHeight = height; // Next row is at least 'height' high
+				nextX = 0;          // Start the row over
+			} else {
+				// Not wrapping
+				
+				// Update rowHeight if necessary
+				if (rowHeight < height) {
+					rowHeight = height;
+				}
+			}
+		}
+
+		private Vec2 toPrimitiveCoords(int x, int y) {
+			return new Vec2(
+					toPrimitiveCoord(x),
+					toPrimitiveCoord(y)
+			);
+		}
+
+		private float toPrimitiveCoord(int c) {
+			return c / (float) getSize();
+		}
+
+		public boolean canAddSprite(TextureDataEditor data) {
+			int width = data.getContentWidth();
+			int height = data.getContentHeight();
+			
+			// Try to fit without wrapping
+			
+			if (nextY + height > getSize())
+				// Does not fit vertically
+				return false;
+			
+			if (nextX + width <= getSize())
+				// Can place at (nextX; nextY)
+				return true;
+			
+			// Try wrapping
+			
+			if (width > getSize())
+				// GTFO. We couldn't fit if if we tried
+				return false;
+			
+			if (nextY + rowHeight + height > getSize())
+				// Does not fit vertically when wrapped
+				return false;
+			
+			// Can place at (0; nextY + rowHeight)
+			return true;
+		}
+		
+		public void flush() {
+			editor.createSnapshot(primitive.getData());
+			editor.close();
+		}
+		
+		public AtlasGroup getGroup() {
+			return group;
+		}
+		
+		public TexturePrimitive getPrimitive() {
+			return primitive;
+		}
+		
+		public int getSize() {
+			return editor.getBufferWidth();
+		}
+	}
+	
+	private static final TextureSettings SETTINGS = new TextureSettings(false);
+	
+	private static final Map<Resource, Sprite> LOADED =
+			new HashMap<>();
+	private static final Multimap<AtlasGroup, Atlas> ATLASES =
+			MultimapBuilder.hashKeys().arrayListValues().build();
+	
+	public static Sprite getSprite(Resource resource, AtlasGroup group) {
+		return LOADED.computeIfAbsent(resource, k -> loadSprite(k, group));
+	}
+	
+	private static Sprite loadSprite(Resource resource, AtlasGroup group) {
+		try (
+				TextureDataEditor data =
+						TextureLoader.loadPixels(resource, SETTINGS)
+		) {
+			
+			Atlas atlas = getReadyAtlas(group, data);
+			return atlas.addSprite(data);
+			
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+	}
+	
+	private static Atlas getReadyAtlas(AtlasGroup group, TextureDataEditor data) {
+		List<Atlas> atlases = (List<Atlas>) ATLASES.get(group);
+		
+		if (
+				atlases.isEmpty() ||
+				!(atlases.get(atlases.size() - 1).canAddSprite(data))
+		) {
+			Atlas newAtlas = new Atlas(group);
+			
+			if (!newAtlas.canAddSprite(data)) {
+				throw new RuntimeException("Could not fit tex into atlas of size " + newAtlas.getSize());
+			}
+			
+			atlases.add(newAtlas);
+		}
+		
+		return atlases.get(atlases.size() - 1);
+	}
+
+	public static void loadAllAtlases() {
+		ATLASES.forEach((group, atlas) -> {
+			atlas.flush();
+			RenderTaskQueue.invokeLater(atlas.getPrimitive()::load);
+		});
+	}
+	
+	private Atlases() {}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/texture/PngLoader.java

@@ -1,126 +0,0 @@
-/*******************************************************************************
- * Progressia
- * Copyright (C) 2020  Wind Corporation
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *******************************************************************************/
-package ru.windcorp.progressia.client.graphics.texture;
-
-import java.awt.Graphics2D;
-import java.awt.color.ColorSpace;
-import java.awt.image.BufferedImage;
-import java.awt.image.ColorModel;
-import java.awt.image.ComponentColorModel;
-import java.awt.image.DataBuffer;
-import java.awt.image.DataBufferByte;
-import java.awt.image.Raster;
-import java.awt.image.WritableRaster;
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.ByteBuffer;
-import java.util.Hashtable;
-import javax.imageio.ImageIO;
-import org.lwjgl.BufferUtils;
-
-import ru.windcorp.progressia.common.util.BinUtil;
-
-class PngLoader {
-	
-	private static final ColorModel COLOR_MODEL = new ComponentColorModel(
-			ColorSpace.getInstance(ColorSpace.CS_sRGB), // Use RGB
-			new int[] {8, 8, 8, 8},                     // Use every bit
-			true,                                       // Has alpha
-			false,                                      // Not premultiplied
-			ComponentColorModel.TRANSLUCENT,            // Can have any alpha
-			DataBuffer.TYPE_BYTE                        // Alpha is one byte
-	);
-	
-	private static final Hashtable<?, ?> CANVAS_PROPERTIES = new Hashtable<>();
-	
-	private static final java.awt.Color CANVAS_BACKGROUND = new java.awt.Color(0, 0, 0, 0);
-	
-	public static Pixels loadPngImage(
-			InputStream pngStream,
-			TextureSettings settings
-	) throws IOException {
-
-		BufferedImage readResult = ImageIO.read(pngStream);
-		
-		int width = readResult.getWidth();
-		int height = readResult.getHeight();
-		
-		int bufferWidth = BinUtil.roundToGreaterPowerOf2(width);
-		int bufferHeight = BinUtil.roundToGreaterPowerOf2(height);
-		
-		WritableRaster raster = createRaster(bufferWidth, bufferHeight);
-
-		BufferedImage canvas = createCanvas(raster);
-		
-		Graphics2D g = canvas.createGraphics();
-		try {
-			g.setColor(CANVAS_BACKGROUND);
-			g.fillRect(0, 0, width, height);
-			g.drawImage(
-					readResult,
-					0, 0, width, height,
-					0, height, width, 0, // Flip the image
-					null
-			);
-		} finally {
-			g.dispose();
-		}
-		
-		return new Pixels(
-				extractBytes(raster),
-				bufferWidth, bufferHeight,
-				width, height,
-				settings
-		);
-	}
-	
-	private static WritableRaster createRaster(
-			int bufferWidth,
-			int bufferHeight
-	) {
-		return Raster.createInterleavedRaster(
-				DataBuffer.TYPE_BYTE, // Storage model
-				bufferWidth,          // Buffer width
-				bufferHeight,         // Buffer height
-				4,                    // RGBA
-				null                  // Location (here (0; 0))
-		);
-	}
-	
-	private static BufferedImage createCanvas(WritableRaster raster) {
-		return new BufferedImage(
-				COLOR_MODEL,      // Color model
-				raster,           // Backing raster
-				false,            // Raster is not premultipied
-				CANVAS_PROPERTIES // Properties
-		);
-	}
-	
-	private static ByteBuffer extractBytes(WritableRaster raster) {
-		byte[] data = (
-				(DataBufferByte) raster.getDataBuffer()
-		).getData();
-		
-		ByteBuffer buffer = BufferUtils.createByteBuffer(data.length);
-		buffer.put(data);
-		buffer.flip();
-		
-		return buffer;
-	}
-
-}

src/main/java/ru/windcorp/progressia/client/graphics/texture/SimpleTextures.java

@@ -0,0 +1,44 @@
+package ru.windcorp.progressia.client.graphics.texture;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import ru.windcorp.progressia.common.resource.Resource;
+import ru.windcorp.progressia.common.resource.ResourceManager;
+
+public class SimpleTextures {
+	
+	private static final TextureSettings SETTINGS = new TextureSettings(false);
+	
+	private static final Map<Resource, Texture> TEXTURES = new HashMap<>();
+	
+	public static Texture get(Resource resource) {
+		return TEXTURES.computeIfAbsent(resource, SimpleTextures::load);
+	}
+	
+	public static Texture get(String textureName) {
+		return get(ResourceManager.getTextureResource(textureName));
+	}
+	
+	private static Texture load(Resource resource) {
+		try (
+				TextureDataEditor data =
+						TextureLoader.loadPixels(resource, SETTINGS)
+		) {
+			return new SimpleTexture(
+					new Sprite(
+							new TexturePrimitive(
+									data.toStatic()
+							)
+					)
+			);
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+		
+	}
+
+	private SimpleTextures() {}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/texture/TextureData.java

@@ -22,7 +22,7 @@ import static org.lwjgl.opengl.GL12.*;
 
 import java.nio.ByteBuffer;
 
-class Pixels {
+class TextureData {
 	
 	private final ByteBuffer data;
 	
@@ -34,7 +34,7 @@ class Pixels {
 	private final int width;
 	private final int height;
 	
-	public Pixels(
+	public TextureData(
 			ByteBuffer data,
 			int bufferWidth, int bufferHeight,
 			int width, int height,

src/main/java/ru/windcorp/progressia/client/graphics/texture/TextureDataEditor.java

@@ -0,0 +1,185 @@
+package ru.windcorp.progressia.client.graphics.texture;
+
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+
+public class TextureDataEditor implements AutoCloseable {
+	
+	protected final BufferedImage image;
+	protected Graphics2D graphics;
+	
+	private final int contentWidth;
+	private final int contentHeight;
+	private final TextureSettings settings;
+	
+	protected TextureDataEditor(
+			BufferedImage image,
+			int contentWidth, int contentHeight,
+			TextureSettings settings
+	) {
+		this.image = image;
+		this.contentWidth = contentWidth;
+		this.contentHeight = contentHeight;
+		this.settings = settings;
+		
+		startEditing();
+	}
+	
+	public TextureDataEditor(
+			int bufferWidth, int bufferHeight,
+			int contentWidth, int contentHeight,
+			TextureSettings settings
+	) {
+		this(
+				TextureUtils.createCanvas(
+						TextureUtils.createRaster(bufferWidth, bufferHeight)
+				),
+				contentWidth, contentHeight,
+				settings
+		);
+	}
+	
+	public TextureDataEditor(TextureData buffer) {
+		this(
+			createImage(buffer),
+			buffer.getContentWidth(),
+			buffer.getContentHeight(),
+			buffer.getSettings()
+		);
+	}
+
+	private static BufferedImage createImage(TextureData buffer) {
+		return TextureUtils.createCanvas(
+				TextureUtils.createRaster(
+						buffer.getData(),
+						buffer.getBufferWidth(),
+						buffer.getBufferHeight()
+				)
+		);
+	}
+
+	public void startEditing() {
+		if (isEditable()) {
+			throw new IllegalStateException("This object is already editable");
+		}
+		
+		this.graphics = this.image.createGraphics();
+		
+		graphics.setColor(TextureUtils.CANVAS_BACKGROUND);
+		graphics.fillRect(0, 0, image.getWidth(), image.getHeight());
+		
+		graphics.clipRect(0, 0, contentWidth, contentHeight);
+	}
+	
+	public void finishEditing() {
+		checkEditability();
+		this.graphics.dispose();
+		this.graphics = null;
+	}
+	
+	@Override
+	public void close() {
+		if (isEditable()) {
+			finishEditing();
+		}
+	}
+	
+	public boolean isEditable() {
+		return this.graphics != null;
+	}
+	
+	protected void checkEditability() {
+		if (!isEditable()) {
+			throw new IllegalStateException("This object is not editable");
+		}
+	}
+	
+	public TextureData createSnapshot() {
+		return new TextureData(
+				TextureUtils.extractBytes(image.getRaster()),
+				image.getWidth(), image.getHeight(),
+				contentWidth, contentHeight,
+				settings
+		);
+	}
+	
+	public TextureData createSnapshot(TextureData output) {
+		TextureUtils.extractBytes(image.getRaster(), output.getData());
+		return output;
+	}
+	
+	public TextureData toStatic() {
+		close();
+		return createSnapshot();
+	}
+
+	public TextureData toStatic(TextureData data) {
+		close();
+		return createSnapshot(data);
+	}
+
+	public int getBufferWidth() {
+		return image.getWidth();
+	}
+	
+	public int getBufferHeight() {
+		return image.getHeight();
+	}
+	
+	public int getContentWidth() {
+		return contentWidth;
+	}
+	
+	public int getContentHeight() {
+		return contentHeight;
+	}
+	
+	public TextureSettings getSettings() {
+		return settings;
+	}
+	
+	public void draw(
+			BufferedImage source,
+			int srcX, int srcY,
+			int dstX, int dstY,
+			int width, int height
+	) {
+		checkEditability();
+		
+		graphics.drawImage(
+				source,
+				dstX, dstY,
+				dstX + width, dstY + height,
+				srcX, srcY,
+				srcX + width, srcY + height,
+				null
+		);
+	}
+	
+	public void draw(
+			BufferedImage source,
+			int dstX, int dstY
+	) {
+		draw(source, 0, 0, dstX, dstY, source.getWidth(), source.getHeight());
+	}
+	
+	public void draw(
+			TextureDataEditor source,
+			int srcX, int srcY,
+			int dstX, int dstY,
+			int width, int height
+	) {
+		draw(source.image, srcX, srcY, dstX, dstY, width, height);
+	}
+	
+	public void draw(
+			TextureDataEditor source,
+			int dstX, int dstY
+	) {
+		draw(
+				source, 0, 0, dstX, dstY,
+				source.getContentWidth(), source.getContentHeight()
+		);
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/texture/TextureLoader.java

@@ -0,0 +1,49 @@
+package ru.windcorp.progressia.client.graphics.texture;
+
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.imageio.ImageIO;
+
+import ru.windcorp.progressia.common.resource.Resource;
+import ru.windcorp.progressia.common.util.BinUtil;
+
+public class TextureLoader {
+	
+	public static TextureDataEditor loadPixels(
+			InputStream compressed, TextureSettings settings
+	) throws IOException {
+		BufferedImage readResult = ImageIO.read(compressed);
+		
+		int width = readResult.getWidth();
+		int height = readResult.getHeight();
+		
+		int bufferWidth = BinUtil.roundToGreaterPowerOf2(width);
+		int bufferHeight = BinUtil.roundToGreaterPowerOf2(height);
+		
+		TextureDataEditor result = new TextureDataEditor(
+				bufferWidth, bufferHeight, width, height, settings
+		);
+		
+		Graphics2D g = result.graphics;
+		g.drawImage(
+				readResult,
+				0, 0, width, height,
+				0, height, width, 0, // Flip the image
+				null
+		);
+		
+		return result;
+	}
+	
+	public static TextureDataEditor loadPixels(
+			Resource resource, TextureSettings settings
+	) throws IOException {
+		return loadPixels(resource.getInputStream(), settings);
+	}
+	
+	private TextureLoader() {}
+
+}

src/main/java/ru/windcorp/progressia/client/graphics/texture/TextureManager.java

@@ -1,218 +0,0 @@
-/*******************************************************************************
- * Progressia
- * Copyright (C) 2020  Wind Corporation
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *******************************************************************************/
-package ru.windcorp.progressia.client.graphics.texture;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.ByteBuffer;
-import java.util.HashMap;
-import java.util.Map;
-
-import ru.windcorp.progressia.client.graphics.backend.RenderTaskQueue;
-import ru.windcorp.progressia.common.resource.Resource;
-import ru.windcorp.progressia.common.resource.ResourceManager;
-import ru.windcorp.progressia.common.util.ByteBufferInputStream;
-
-public class TextureManager {
-	
-	private static final String TEXTURE_ASSETS_PREFIX = "assets/textures/";
-	
-	private static final Map<String, Pixels> LOADED_PIXELS =
-			new HashMap<>();
-	
-	private static final Map<String, TexturePrimitive> LOADED_PRIMITIVES =
-			new HashMap<>();
-	
-	private static Pixels getCachedPixels(String name) {
-		return LOADED_PIXELS.get(name);
-	}
-	
-	private static Pixels getCachedPixels(Resource resource) {
-		return getCachedPixels(resource.getName());
-	}
-	
-	private static Pixels cachePixels(Pixels pixels, String name) {
-		LOADED_PIXELS.put(name, pixels);
-		return pixels;
-	}
-	
-	private static Pixels cachePixels(Pixels pixels, Resource resource) {
-		return cachePixels(pixels, resource.getName());
-	}
-	
-	private static TexturePrimitive getCachedPrimitive(String name) {
-		return LOADED_PRIMITIVES.get(name);
-	}
-	
-	private static TexturePrimitive getCachedPrimitive(Resource resource) {
-		return getCachedPrimitive(resource.getName());
-	}
-	
-	private static TexturePrimitive cachePrimitive(
-			TexturePrimitive primitive,
-			String name
-	) {
-		LOADED_PRIMITIVES.put(name, primitive);
-		return primitive;
-	}
-	
-	private static TexturePrimitive cachePrimitive(
-			TexturePrimitive primitive,
-			Resource resource
-	) {
-		return cachePrimitive(primitive, resource.getName());
-	}
-	
-	private static Resource getResource(String textureName) {
-		return ResourceManager.getResource(
-				TEXTURE_ASSETS_PREFIX + textureName + ".png"
-		);
-	}
-	
-	public static Pixels createOpenGLBuffer(
-			InputStream stream,
-			TextureSettings settings
-	) {
-		try {
-			return PngLoader.loadPngImage(stream, settings);
-		} catch (IOException e) {
-			throw new RuntimeException("u stupid. refresh ur project");
-		}
-	}
-	
-	public static Pixels createOpenGLBuffer(
-			Resource resource,
-			TextureSettings settings
-	) {
-		Pixels cache = getCachedPixels(resource);
-		if (cache != null) return cache;
-		return cachePixels(
-				createOpenGLBuffer(resource.getInputStream(), settings),
-				resource
-		);
-	}
-	
-	public static Pixels createOpenGLBuffer(
-			String textureName,
-			TextureSettings settings
-	) {
-		Pixels cache = getCachedPixels(textureName);
-		if (cache != null) return cache;
-		return cachePixels(
-				createOpenGLBuffer(getResource(textureName), settings),
-				textureName
-		);
-	}
-	
-	public static Pixels createOpenGLBuffer(
-			ByteBuffer bytes,
-			TextureSettings settings
-	) {
-		bytes.mark();
-		try {
-			return createOpenGLBuffer(
-					new ByteBufferInputStream(bytes), settings
-			);
-		} finally {
-			bytes.reset();
-		}
-	}
-	
-	public static TexturePrimitive createTexturePrimitive(
-			InputStream stream,
-			TextureSettings settings
-	) {
-		Pixels pixels = createOpenGLBuffer(stream, settings);
-		TexturePrimitive result = new TexturePrimitive(pixels);
-		return result;
-	}
-	
-	public static TexturePrimitive createTexturePrimitive(
-			Resource resource,
-			TextureSettings settings
-	) {
-		TexturePrimitive primitive = getCachedPrimitive(resource);
-		if (primitive != null) return primitive;
-		return cachePrimitive(
-				createTexturePrimitive(resource.getInputStream(), settings),
-				resource
-		);
-	}
-	
-	public static TexturePrimitive createTexturePrimitive(
-			String textureName,
-			TextureSettings settings
-	) {
-		TexturePrimitive primitive = getCachedPrimitive(textureName);
-		if (primitive != null) return primitive;
-		return cachePrimitive(
-				createTexturePrimitive(getResource(textureName), settings),
-				textureName
-		);
-	}
-	
-	public static TexturePrimitive createTexturePrimitive(
-			ByteBuffer bytes,
-			TextureSettings settings
-	) {
-		bytes.mark();
-		try {
-			return createTexturePrimitive(
-					new ByteBufferInputStream(bytes), settings
-			);
-		} finally {
-			bytes.reset();
-		}
-	}
-	
-	public static TexturePrimitive load(
-			InputStream stream,
-			TextureSettings settings
-	) {
-		TexturePrimitive result = createTexturePrimitive(stream, settings);
-		if (!result.isLoaded()) RenderTaskQueue.invokeLater(result::load);
-		return result;
-	}
-
-	public static TexturePrimitive load(
-			Resource resource,
-			TextureSettings settings
-	) {
-		return load(resource.getInputStream(), settings);
-	}
-
-	public static TexturePrimitive load(
-			String textureName,
-			TextureSettings settings
-	) {
-		return load(getResource(textureName), settings);
-	}
-	
-	public static TexturePrimitive load(
-			ByteBuffer bytes,
-			TextureSettings settings
-	) {
-		bytes.mark();
-		try {
-			return load(new ByteBufferInputStream(bytes), settings);
-		} finally {
-			bytes.reset();
-		}
-	}
-
-}

src/main/java/ru/windcorp/progressia/client/graphics/texture/TexturePrimitive.java

@@ -20,6 +20,8 @@ package ru.windcorp.progressia.client.graphics.texture;
 import static org.lwjgl.opengl.GL11.*;
 import static org.lwjgl.opengl.GL20.*;
 
+import java.util.Arrays;
+
 import ru.windcorp.progressia.client.graphics.backend.OpenGLObjectTracker;
 import ru.windcorp.progressia.client.graphics.backend.OpenGLObjectTracker.OpenGLDeletable;
 
@@ -27,13 +29,22 @@ public class TexturePrimitive implements OpenGLDeletable {
 	
 	private static final int NOT_LOADED = -1;
 	
-	private int handle = NOT_LOADED;
-	private Pixels pixels;
+	private static int[] currentlyBound = new int[32];
+	static {
+		Arrays.fill(currentlyBound, NOT_LOADED);
+	}
 	
-	public TexturePrimitive(Pixels pixels) {
+	private int handle = NOT_LOADED;
+	private TextureData pixels;
+
+	public TexturePrimitive(TextureData pixels) {
 		this.pixels = pixels;
 	}
 	
+	public TextureData getData() {
+		return pixels;
+	}
+	
 	public int getBufferWidth() {
 		return pixels.getBufferWidth();
 	}
@@ -59,10 +70,16 @@ public class TexturePrimitive implements OpenGLDeletable {
 			load();
 		}
 		
+		if (currentlyBound[slot] == handle) {
+			return;
+		}
+		
 		int code = GL_TEXTURE0 + slot;
 		
 		glActiveTexture(code);
 		glBindTexture(GL_TEXTURE_2D, handle);
+		
+		currentlyBound[slot] = handle;
 	}
 
 	protected void load() {

src/main/java/ru/windcorp/progressia/client/graphics/texture/TextureUtils.java

@@ -0,0 +1,108 @@
+package ru.windcorp.progressia.client.graphics.texture;
+
+import java.awt.Color;
+import java.awt.Transparency;
+import java.awt.color.ColorSpace;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
+import java.awt.image.ComponentColorModel;
+import java.awt.image.DataBuffer;
+import java.awt.image.DataBufferByte;
+import java.awt.image.Raster;
+import java.awt.image.WritableRaster;
+import java.nio.ByteBuffer;
+import java.util.Hashtable;
+
+import org.lwjgl.BufferUtils;
+
+public class TextureUtils {
+	
+	public static final Color CANVAS_BACKGROUND = new Color(0, true);
+	
+	public static final ColorModel COLOR_MODEL = new ComponentColorModel(
+			ColorSpace.getInstance(ColorSpace.CS_sRGB), // Use RGB
+			new int[] {8, 8, 8, 8},                     // Use every bit
+			true,                                       // Has alpha
+			false,                                      // Not premultiplied
+			Transparency.TRANSLUCENT,                   // Can have any alpha
+			DataBuffer.TYPE_BYTE                        // Alpha is one byte
+	);
+	
+	private static final Hashtable<?, ?> BUFFERED_IMAGE_PROPERTIES =
+			new Hashtable<>();
+	
+	public static WritableRaster createRaster(
+			int bufferWidth,
+			int bufferHeight
+	) {
+		return Raster.createInterleavedRaster(
+				DataBuffer.TYPE_BYTE, // Storage model
+				bufferWidth,          // Buffer width
+				bufferHeight,         // Buffer height
+				4,                    // RGBA
+				null                  // Location (here (0; 0))
+		);
+	}
+	
+	public static WritableRaster createRaster(
+			ByteBuffer buffer,
+			int bufferWidth,
+			int bufferHeight
+	) {
+		final int bands = 4; // RGBA
+		
+		byte[] bytes = new byte[bufferWidth * bufferHeight * bands];
+		
+		buffer.get(bytes);
+		buffer.position(buffer.position() - bytes.length);
+		
+		DataBufferByte dataBuffer = new DataBufferByte(bytes, bytes.length);
+		
+		return Raster.createInterleavedRaster(
+				dataBuffer,             // The buffer
+				bufferWidth,            // Buffer width
+				bufferHeight,           // Buffer height
+				bands * bufferWidth,    // Scanline stride
+				bands,                  // Pixel stride
+				new int[] {0, 1, 2, 3}, // Band offsets
+				null                    // Location (here (0; 0))
+		);
+	}
+	
+	public static BufferedImage createCanvas(WritableRaster raster) {
+		return new BufferedImage(
+				COLOR_MODEL,              // Color model
+				raster,                   // Backing raster
+				false,                    // Raster is not premultipied
+				BUFFERED_IMAGE_PROPERTIES // Properties
+		);
+	}
+	
+	public static ByteBuffer extractBytes(WritableRaster raster) {
+		byte[] data = (
+				(DataBufferByte) raster.getDataBuffer()
+		).getData();
+		
+		ByteBuffer buffer = BufferUtils.createByteBuffer(data.length);
+		buffer.put(data);
+		buffer.flip();
+		
+		return buffer;
+	}
+	
+	public static ByteBuffer extractBytes(
+			WritableRaster raster, ByteBuffer output
+	) {
+		byte[] data = (
+				(DataBufferByte) raster.getDataBuffer()
+		).getData();
+		
+		output.put(data);
+		output.flip();
+		
+		return output;
+	}
+	
+	private TextureUtils() {}
+
+}

src/main/java/ru/windcorp/progressia/client/world/renders/BlockRenders.java

@@ -20,38 +20,39 @@ package ru.windcorp.progressia.client.world.renders;
 import java.util.HashMap;
 import java.util.Map;
 
+import ru.windcorp.progressia.client.graphics.texture.Atlases;
+import ru.windcorp.progressia.client.graphics.texture.Atlases.AtlasGroup;
 import ru.windcorp.progressia.client.graphics.texture.SimpleTexture;
-import ru.windcorp.progressia.client.graphics.texture.Sprite;
 import ru.windcorp.progressia.client.graphics.texture.Texture;
-import ru.windcorp.progressia.client.graphics.texture.TextureManager;
-import ru.windcorp.progressia.client.graphics.texture.TextureSettings;
 import ru.windcorp.progressia.client.world.renders.bro.BlockRenderOpaqueCube;
+import ru.windcorp.progressia.common.resource.ResourceManager;
 
 public class BlockRenders {
 	
 	private static final Map<String, BlockRender> BLOCK_RENDERS =
 			new HashMap<>();
 	
-	private static final TextureSettings TEXTURE_SETTINGS =
-			new TextureSettings(false);
+	private static final AtlasGroup BLOCKS_ATLAS_GROUP =
+			new AtlasGroup("Blocks", 1 << 6);
 	
-	private static Texture grassTop = qtex("grass_top");
-	private static Texture grassSide = qtex("grass_side");
-	private static Texture dirtT = qtex("grass_bottom");
-	private static Texture stoneT = qtex("stone");
-	private static Texture glassT = qtex("glass_clear");
+	private static Texture grassTop = getTexture("grass_top");
+	private static Texture grassSide = getTexture("grass_side");
+	private static Texture dirt = getTexture("grass_bottom");
+	private static Texture stone = getTexture("stone");
+	private static Texture glass = getTexture("glass_clear");
+	private static Texture compass = getTexture("compass");
 
 	private BlockRenders() {}
 	
-	static {
-		register(new BlockRenderOpaqueCube("Test", "Grass", grassTop, dirtT, grassSide, grassSide, grassSide, grassSide));
-		register(new BlockRenderOpaqueCube("Test", "Dirt", dirtT, dirtT, dirtT, dirtT, dirtT, dirtT));
-		register(new BlockRenderOpaqueCube("Test", "Stone", stoneT, stoneT, stoneT, stoneT, stoneT, stoneT));
+	public static void registerTest() {
+		register(new BlockRenderOpaqueCube("Test", "Grass", grassTop, dirt, grassSide, grassSide, grassSide, grassSide));
+		register(new BlockRenderOpaqueCube("Test", "Dirt", dirt, dirt, dirt, dirt, dirt, dirt));
+		register(new BlockRenderOpaqueCube("Test", "Stone", stone, stone, stone, stone, stone, stone));
 
-		register(new BlockRenderOpaqueCube("Test", "Compass", qtex("compass"), qtex("compass"), qtex("side_north"), qtex("side_south"), qtex("side_east"), qtex("side_west")));
+		register(new BlockRenderOpaqueCube("Test", "Compass", compass, compass, getTexture("side_north"), getTexture("side_south"), getTexture("side_east"), getTexture("side_west")));
 		
 		register(new BlockRenderNone("Test", "Air"));
-		register(new BlockRenderTransparentCube("Test", "Glass", glassT, glassT, glassT, glassT, glassT, glassT));
+		register(new BlockRenderTransparentCube("Test", "Glass", glass, glass, glass, glass, glass, glass));
 	}
 	
 	public static BlockRender get(String name) {
@@ -62,10 +63,13 @@ public class BlockRenders {
 		BLOCK_RENDERS.put(blockRender.getId(), blockRender);
 	}
 	
-	private static Texture qtex(String name) {
-		return new SimpleTexture(new Sprite(
-				TextureManager.load(name, TEXTURE_SETTINGS)
-		));
+	public static Texture getTexture(String name) {
+		return new SimpleTexture(
+				Atlases.getSprite(
+						ResourceManager.getTextureResource("blocks/" + name),
+						BLOCKS_ATLAS_GROUP
+				)
+		);
 	}
 
 }

src/main/java/ru/windcorp/progressia/common/resource/Resource.java

@@ -25,22 +25,17 @@ import java.io.Reader;
 import com.google.common.io.CharStreams;
 
 import ru.windcorp.progressia.Progressia;
+import ru.windcorp.progressia.common.util.Named;
 
-public class Resource {
-	
-	private final String name;
+public class Resource extends Named {
 	
 	public Resource(String name) {
-		this.name = name;
-	}
-	
-	public String getName() {
-		return name;
+		super(name);
 	}
 	
 	public InputStream getInputStream() {
 		// TODO Do proper resource lookup
-		return Progressia.class.getClassLoader().getResourceAsStream(name);
+		return Progressia.class.getClassLoader().getResourceAsStream(getName());
 	}
 	
 	public Reader getReader() {

src/main/java/ru/windcorp/progressia/common/resource/ResourceManager.java

@@ -23,4 +23,10 @@ public class ResourceManager {
 		return new Resource(name);
 	}
 	
+	public static Resource getTextureResource(String name) {
+		return getResource("assets/textures/" + name + ".png");
+	}
+	
+	private ResourceManager() {}
+
 }