FileDocCategorySizeDatePackage
Texture.javaAPI DocAndroid 1.5 API3959Wed May 06 22:42:00 BST 2009android.opengl

Texture

public class Texture extends Object
{@hide}

Fields Summary
private int
width
private int
height
private int
bpp
private ByteBuffer
data
private int
name
Constructors Summary
public Texture(InputStream is)

        this.width  = readInt16(is);
        this.height  = readInt16(is);
        this.bpp = 2;

        int npixels = width*height;
        int nbytes = npixels*bpp;
        byte[] arr = new byte[nbytes];

        int idx = 0;
        while (idx < nbytes) {
            int nread = is.read(arr, idx, nbytes - idx);
            idx += nread;
        }

        if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) {
            // Swap pairs of bytes on big-endian platforms
            for (int i = 0; i < npixels; i++) {
                int j = i*2;
                int k = j + 1;

                byte tmp = arr[j];
                arr[j] = arr[k];
                arr[k] = tmp;
            }
        }

        this.data = ByteBuffer.allocateDirect(arr.length);
        this.data.order(ByteOrder.nativeOrder());
        data.put(arr);
        data.position(0);
Methods Summary
private intloadTexture(javax.microedition.khronos.opengles.GL10 gl, int textureUnit, int minFilter, int magFilter, int wrapS, int wrapT, int mode, int width, int height, int dataType, java.nio.Buffer data)

        int[] texture = new int[1];
        gl.glGenTextures(1, texture, 0);

        gl.glEnable(gl.GL_TEXTURE_2D);
        gl.glClientActiveTexture(textureUnit);
        gl.glBindTexture(gl.GL_TEXTURE_2D, texture[0]);
        gl.glTexParameterf(gl.GL_TEXTURE_2D,
                gl.GL_TEXTURE_MIN_FILTER,
                minFilter);
        gl.glTexParameterf(gl.GL_TEXTURE_2D,
                gl.GL_TEXTURE_MAG_FILTER,
                magFilter);
        gl.glTexParameterf(gl.GL_TEXTURE_2D,
                gl.GL_TEXTURE_WRAP_S,
                wrapS);
        gl.glTexParameterf(gl.GL_TEXTURE_2D,
                gl.GL_TEXTURE_WRAP_T,
                wrapT);
        gl.glTexEnvf(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_MODE, mode);

        gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_RGB,
                width, height,
                0, gl.GL_RGB, dataType,
                data);

        return texture[0];
private intreadInt16(java.io.InputStream is)


    // Texture maps have the following format.  All integers
    // are 16 bits, high byte first.  Pixels are in 5/6/5
    // RGB format, low byte first.
    //
    // width
    // height
    // pixel (0, 0)
    // pixel (1, 0)
    // ...
    // pixel (width - 1, height - 1)

          
        return is.read() | (is.read() << 8);
public voidsetTextureParameters(javax.microedition.khronos.opengles.GL10 gl)

        if (name < 0) {
            name = loadTexture(gl,
                    gl.GL_TEXTURE0,
                    gl.GL_NEAREST, gl.GL_NEAREST,
                    gl.GL_REPEAT, gl.GL_REPEAT,
                    gl.GL_MODULATE,
                    width, height,
                    gl.GL_UNSIGNED_SHORT_5_6_5,
                    data);
        }

        gl.glBindTexture(gl.GL_TEXTURE_2D, name);