Converted ShatteredPD to Build from Gradle

Major Changes:
- Shattered now builds effortlessly either from gradle CLI or android studio
- Much better dependency management through gradle (although it's not really used atm)
- Separate PD-classes repo is now SPD-classes module within main repo

SPD-classes/src/main/java/com/watabou/noosa/Image.java

@@ -0,0 +1,171 @@
+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2015  Oleg Dolya
+ *
+ * Shattered Pixel Dungeon
+ * Copyright (C) 2014-2016 Evan Debenham
+ *
+ * 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 <http://www.gnu.org/licenses/>
+ */
+
+package com.watabou.noosa;
+
+import java.nio.FloatBuffer;
+
+import android.graphics.RectF;
+
+import com.watabou.gltextures.TextureCache;
+import com.watabou.gltextures.SmartTexture;
+import com.watabou.glwrap.Quad;
+
+public class Image extends Visual {
+
+	public SmartTexture texture;
+	protected RectF frame;
+	
+	public boolean flipHorizontal;
+	public boolean flipVertical;
+	
+	protected float[] vertices;
+	protected FloatBuffer verticesBuffer;
+	
+	protected boolean dirty;
+	
+	public Image() {
+		super( 0, 0, 0, 0 );
+		
+		vertices = new float[16];
+		verticesBuffer = Quad.create();
+	}
+	
+	public Image( Image src ) {
+		this();
+		copy( src );
+	}
+	
+	public Image( Object tx ) {
+		this();
+		texture( tx );
+	}
+	
+	public Image( Object tx, int left, int top, int width, int height ) {
+		this( tx );
+		frame( texture.uvRect( left,  top,  left + width, top + height ) );
+	}
+	
+	public void texture( Object tx ) {
+		texture = tx instanceof SmartTexture ? (SmartTexture)tx : TextureCache.get( tx );
+		frame( new RectF( 0, 0, 1, 1 ) );
+	}
+	
+	public void frame( RectF frame ) {
+		this.frame = frame;
+		
+		width = frame.width() * texture.width;
+		height = frame.height() * texture.height;
+		
+		updateFrame();
+		updateVertices();
+	}
+	
+	public void frame( int left, int top, int width, int height ) {
+		frame( texture.uvRect( left, top, left + width, top + height ) );
+	}
+	
+	public RectF frame() {
+		return new RectF( frame );
+	}
+
+	public void copy( Image other ) {
+		texture = other.texture;
+		frame = new RectF( other.frame );
+		
+		width = other.width;
+		height = other.height;
+		
+		updateFrame();
+		updateVertices();
+	}
+	
+	protected void updateFrame() {
+		
+		if (flipHorizontal) {
+			vertices[2]		= frame.right;
+			vertices[6]		= frame.left;
+			vertices[10]	= frame.left;
+			vertices[14]	= frame.right;
+		} else {
+			vertices[2]		= frame.left;
+			vertices[6]		= frame.right;
+			vertices[10]	= frame.right;
+			vertices[14]	= frame.left;
+		}
+		
+		if (flipVertical) {
+			vertices[3]		= frame.bottom;
+			vertices[7]		= frame.bottom;
+			vertices[11]	= frame.top;
+			vertices[15]	= frame.top;
+		} else {
+			vertices[3]		= frame.top;
+			vertices[7]		= frame.top;
+			vertices[11]	= frame.bottom;
+			vertices[15]	= frame.bottom;
+		}
+		
+		dirty = true;
+	}
+	
+	protected void updateVertices() {
+		
+		vertices[0] 	= 0;
+		vertices[1] 	= 0;
+		
+		vertices[4] 	= width;
+		vertices[5] 	= 0;
+		
+		vertices[8] 	= width;
+		vertices[9] 	= height;
+		
+		vertices[12]	= 0;
+		vertices[13]	= height;
+		
+		dirty = true;
+	}
+	
+	@Override
+	public void draw() {
+		
+		super.draw();
+
+		NoosaScript script = NoosaScript.get();
+		
+		texture.bind();
+		
+		script.camera( camera() );
+		
+		script.uModel.valueM4( matrix );
+		script.lighting(
+			rm, gm, bm, am,
+			ra, ga, ba, aa );
+		
+		if (dirty) {
+			verticesBuffer.position( 0 );
+			verticesBuffer.put( vertices );
+			dirty = false;
+		}
+		script.drawQuad( verticesBuffer );
+		
+	}
+}