FileTextureData.java

/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.graphics.glutils;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.Pixmap;
import com.badlogic.gdx.graphics.Pixmap.Format;
import com.badlogic.gdx.graphics.PixmapIO;
import com.badlogic.gdx.graphics.TextureData;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.utils.GdxRuntimeException;

public class FileTextureData implements TextureData {
	static public boolean copyToPOT;

	final FileHandle file;
	int width = 0;
	int height = 0;
	Format format;
	Pixmap pixmap;
	boolean useMipMaps;
	boolean isPrepared = false;

	public FileTextureData(FileHandle file, Pixmap preloadedPixmap, Format format, boolean useMipMaps) {
		this.file = file;
		this.pixmap = preloadedPixmap;
		this.format = format;
		this.useMipMaps = useMipMaps;
		if (pixmap != null) {
			pixmap = ensurePot(pixmap);
			width = pixmap.getWidth();
			height = pixmap.getHeight();
			if (format == null)
				this.format = pixmap.getFormat();
		}
	}

	public String getFileName() {
		if (file == null)
			return null;
		return file.name();
	}

	@Override
	public boolean isPrepared() {
		return isPrepared;
	}

	@Override
	public void prepare() {
		if (isPrepared)
			throw new GdxRuntimeException("Already prepared");
		if (pixmap == null) {
			if (file.extension().equals("cim"))
				pixmap = PixmapIO.readCIM(file);
			else
				pixmap = ensurePot(new Pixmap(file));
			width = pixmap.getWidth();
			height = pixmap.getHeight();
			if (format == null)
				format = pixmap.getFormat();
		}
		isPrepared = true;
	}

	private Pixmap ensurePot(Pixmap pixmap) {
		if (Gdx.gl20 == null && copyToPOT) {
			int pixmapWidth = pixmap.getWidth();
			int pixmapHeight = pixmap.getHeight();
			int potWidth = MathUtils.nextPowerOfTwo(pixmapWidth);
			int potHeight = MathUtils.nextPowerOfTwo(pixmapHeight);
			if (pixmapWidth != potWidth || pixmapHeight != potHeight) {
				Pixmap tmp = new Pixmap(potWidth, potHeight, pixmap.getFormat());
				tmp.drawPixmap(pixmap, 0, 0, 0, 0, pixmapWidth, pixmapHeight);
				pixmap.dispose();
				return tmp;
			}
		}
		return pixmap;
	}

	@Override
	public Pixmap consumePixmap() {
		if (!isPrepared)
			throw new GdxRuntimeException("Call prepare() before calling getPixmap()");
		isPrepared = false;
		Pixmap pixmap = this.pixmap;
		this.pixmap = null;
		return pixmap;
	}

	@Override
	public boolean disposePixmap() {
		return true;
	}

	@Override
	public int getWidth() {
		return width;
	}

	@Override
	public int getHeight() {
		return height;
	}

	@Override
	public Format getFormat() {
		return format;
	}

	@Override
	public boolean useMipMaps() {
		return useMipMaps;
	}

	@Override
	public boolean isManaged() {
		return true;
	}

	public FileHandle getFileHandle() {
		return file;
	}

	@Override
	public TextureDataType getType() {
		return TextureDataType.Pixmap;
	}

	@Override
	public void consumeCompressedData() {
		throw new GdxRuntimeException("This TextureData implementation does not upload data itself");
	}
}