/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Android code.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2009-2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Patrick Walton <pcwalton@mozilla.com>
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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package org.mozilla.gecko.gfx;

import org.mozilla.gecko.gfx.CairoImage;
import org.mozilla.gecko.gfx.CairoUtils;
import org.mozilla.gecko.gfx.IntSize;
import org.mozilla.gecko.gfx.LayerController;
import org.mozilla.gecko.gfx.TileLayer;
import android.util.Log;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import javax.microedition.khronos.opengles.GL10;

/**
 * Encapsulates the logic needed to draw a single textured tile.
 */
public class SingleTileLayer extends TileLayer {
    private FloatBuffer mTexCoordBuffer, mVertexBuffer;

    private static final float[] VERTICES = {
        0.0f, 0.0f, 0.0f,
        1.0f, 0.0f, 0.0f,
        0.0f, 1.0f, 0.0f,
        1.0f, 1.0f, 0.0f
    };

    private static final float[] TEX_COORDS = {
        0.0f, 0.0f,
        1.0f, 0.0f,
        0.0f, 1.0f,
        1.0f, 1.0f
    };

    public SingleTileLayer(CairoImage image) { this(false, image); }

    public SingleTileLayer(boolean repeat, CairoImage image) {
        super(repeat, image);

        mVertexBuffer = createBuffer(VERTICES);
        mTexCoordBuffer = createBuffer(TEX_COORDS);
    }

    @Override
    protected void onTileDraw(GL10 gl) {
        IntSize size = getSize();

        if (repeats()) {
            gl.glMatrixMode(GL10.GL_TEXTURE);
            gl.glPushMatrix();
            gl.glScalef(LayerController.TILE_WIDTH / size.width,
                        LayerController.TILE_HEIGHT / size.height,
                        1.0f);

            gl.glMatrixMode(GL10.GL_MODELVIEW);
            gl.glScalef(LayerController.TILE_WIDTH, LayerController.TILE_HEIGHT, 1.0f);
        } else {
            gl.glScalef(size.width, size.height, 1.0f);
        }

        gl.glBindTexture(GL10.GL_TEXTURE_2D, getTextureID());
        drawTriangles(gl, mVertexBuffer, mTexCoordBuffer, 4);

        if (repeats()) {
            gl.glMatrixMode(GL10.GL_TEXTURE);
            gl.glPopMatrix();
            gl.glMatrixMode(GL10.GL_MODELVIEW);
        }
    }
}