Example usage for javax.microedition.khronos.opengles GL10 glTexImage2D

Introduction

In this page you can find the example usage for javax.microedition.khronos.opengles GL10 glTexImage2D.

Prototype

void glTexImage2D(int target, int level, int internalformat, int width, int height, int border, int format,
            int type, java.nio.Buffer pixels);

Source Link

Usage

From source file:Main.java

/**
 * non-premultiplied alpha version of GLUtils.texImage2D(). Note: this method is Slow and should only be used when really necessary!
 *
 * @param gl// www  .  ja  v a2 s.c  o m
 * @param bitmap
 * @see GLUtils.texImage2D()
 */
public static void texImage2DNonPremultipliedAlpha(final GL10 gl, final Bitmap bitmap) {
    final int[] pixels = extractPixels(bitmap);
    final byte[] pixelComponents = new byte[pixels.length * 4];
    int byteIndex = 0, p;
    for (int i = 0; i < pixels.length; i++) {
        p = pixels[i];
        // Convert to byte representation RGBA required by gl.glTexImage2D.
        pixelComponents[byteIndex++] = (byte) ((p >> 16) & 0xFF); // red
        pixelComponents[byteIndex++] = (byte) ((p >> 8) & 0xFF); //
        pixelComponents[byteIndex++] = (byte) ((p) & 0xFF); // blue
        pixelComponents[byteIndex++] = (byte) (p >> 24); // alpha
    }
    gl.glTexImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_RGBA, bitmap.getWidth(), bitmap.getHeight(), 0, GL10.GL_RGBA,
            GL10.GL_UNSIGNED_BYTE, ByteBuffer.wrap(pixelComponents));
}

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