package com.shpaker.experiment;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.IntBuffer;

import javax.microedition.khronos.opengles.GL10;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.opengl.GLUtils;

public class Image {

    private final IntBuffer mTextureBuffer;
    private int x, y, width, height;
    private int texCoords[] = { 0, 0, 0, 0, 0, 0, 0, 0 };

    private void setVerticles(int x, int y, int width, int height) {
        this.x(x);
        this.y(y);
        this.width(width);
        this.height(height);
        this.texCoords[0] = x;
        this.texCoords[1] = y;
        this.texCoords[2] = x + width;
        this.texCoords[3] = y;
        this.texCoords[4] = x;
        this.texCoords[5] = y + height;
        this.texCoords[6] = x + width;
        this.texCoords[7] = y + height;
    }

    public Image() {
        setVerticles(0, 0, 0, 0);
        ByteBuffer tdd = ByteBuffer.allocateDirect(texCoords.length * 4);
        tdd.order(ByteOrder.nativeOrder());
        mTextureBuffer = tdd.asIntBuffer();
    }

    public void src(GL10 gl, Context context, int resource) {
        Bitmap bmp = BitmapFactory.decodeResource(context.getResources(),
                resource);
        GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bmp, 0);
        gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER,
                GL10.GL_LINEAR);
        gl.glTexParameterx(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER,
                GL10.GL_LINEAR);
        bmp.recycle();
    }


    public void drawImage(GL10 gl, int x, int y, int width, int height) {
        gl.glEnable(GL10.GL_TEXTURE_2D);
        gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, mTextureBuffer);
        setVerticles(x, y, width, height);
        mTextureBuffer.put(texCoords);
        mTextureBuffer.position(0);
        gl.glVertexPointer(2, GL10.GL_FIXED, 0, mTextureBuffer);
        // gl.glColor4f(1, 1, 1, 0);
        gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
    }
}