Java Examples for android.opengl.GLES20.glDeleteTextures

protected final void attachToTexture(final Bitmap bitmap) {
    if (bitmap == null) {
        throw new IllegalArgumentException("Bitmap must not be  null");
    }
    if (bitmap.isRecycled()) {
        throw new IllegalStateException("Bitmap is recycled");
    }
    final int[] saveFramebuffer = new int[1];
    glGetIntegerv(GL_FRAMEBUFFER_BINDING, saveFramebuffer, 0);
    final int[] saveViewport = new int[4];
    glGetIntegerv(GL_VIEWPORT, saveViewport, 0);
    final int[] saveTexName = new int[1];
    glGetIntegerv(GL_TEXTURE_BINDING_2D, saveTexName, 0);
    final GLES20FlipVerticalShader shader = new GLES20FlipVerticalShader();
    final int[] textures = new int[1];
    try {
        glGenTextures(textures.length, textures, 0);
        glBindTexture(GL_TEXTURE_2D, textures[0]);
        OpenGlUtils.setupSampler(GL_TEXTURE_2D, GL_LINEAR, GL_NEAREST);
        OpenGlUtils.texImage2D(GL_TEXTURE_2D, 0, bitmap, 0);
        mFramebufferObject.setup(bitmap.getWidth(), bitmap.getHeight());
        shader.setup();
        shader.setFrameSize(mFramebufferObject.getWidth(), mFramebufferObject.getHeight());
        mFramebufferObject.enable();
        glViewport(0, 0, mFramebufferObject.getWidth(), mFramebufferObject.getHeight());
        glClear(GL_COLOR_BUFFER_BIT);
        shader.draw(textures[0], null);
    } catch (final RuntimeException e) {
        mFramebufferObject.release();
        throw e;
    } finally {
        glDeleteTextures(textures.length, textures, 0);
        shader.release();
        glBindFramebuffer(GL_FRAMEBUFFER, saveFramebuffer[0]);
        glViewport(saveViewport[0], saveViewport[1], saveViewport[2], saveViewport[3]);
        glBindTexture(GL_TEXTURE_2D, saveTexName[0]);
    }
}

/**
     * Deletes unused texture ids
     * <p>It should be called in OpenGL thread</p>
     */
public void deleteUnusedTextures() {
    if (mUnusedTexSize > 0) {
        glDeleteTextures(mUnusedTexSize, mUnusedTexIDs, 0);
        mUnusedTexSize = 0;
    }
}