OpenGL ES Framework: Texture

用法：初始化后，在需要绑定的地方，比如onDrawFrame里边调用Texture.bind()函数。

public class Texture 
{
    private String fileName;
    private AssetManager asset;
    private GL10 gl;
    
    private int minFilter;
    private int magFilter;
    
    private int textureId;
    
    public Texture(GL10 gl, AssetManager asset, String fileName)
    {
        this.fileName = fileName;
        this.asset = asset;
        this.gl = gl;
        
        load();
    }
    
    private void load()
    {
        int textureIds[] = new int[1];
        gl.glGenTextures(1, textureIds, 0);
        textureId = textureIds[0];
        
        try 
        {
            Bitmap bitmap = BitmapFactory.decodeStream(asset.open(fileName));
            gl.glBindTexture(GL10.GL_TEXTURE_2D, textureId);
            GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
            setFilters(GL10.GL_NEAREST, GL10.GL_NEAREST);
            gl.glBindTexture(GL10.GL_TEXTURE_2D, 0);
            
        } catch (IOException e) 
        {
            e.printStackTrace();
        }
    }
    
    public void setFilters(int minFilter, int magFilter)
    {
        this.minFilter = minFilter;
        this.magFilter = magFilter;
        
        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, minFilter);
        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, magFilter);
    }
    
    public void bind()
    {
        gl.glEnable(GL10.GL_TEXTURE_2D);
        gl.glBindTexture(GL10.GL_TEXTURE_2D, textureId);
    }
    
    public void dispose()
    {
        gl.glBindTexture(GL10.GL_TEXTURE_2D, textureId);
        int[] textureIds = {textureId};
        gl.glDeleteTextures(1, textureIds, 0);
    }
}