Java Examples for android.opengl.GLES20.glViewport

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]);
    }
}

public void onSurfaceChanged(GL10 gl, int w, int h) {
    glViewport(0, 0, w, h);
    /*
        * Set our projection matrix. This doesn't have to be done
        * each time we draw, but usually a new projection needs to
        * be set when the viewport is resized.
        */
    float ratio = (float) w / h;
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glFrustumf(-ratio, ratio, -1, 1, 3, 7);
}

@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
    glViewport(0, 0, width, height);
}

@Override
public void onSurfaceChanged(int width, int height) {
    glViewport(0, 0, width, height);
    MatrixHelper.perspectiveM(mProjectionMatrix, 90, (float) width / (float) height, 1f, 10f);
    Log.i(TAG, "onSurfaceChanged");
}

/**
     * Handle surface changing event
     *
     * @param width surface width
     * @param height surface height
     * @throws PageFlipException if failed to compile and link OpenGL shader
     */
public void onSurfaceChanged(int width, int height) throws PageFlipException {
    mViewRect.set(width, height);
    glViewport(0, 0, width, height);
    mVertexProgram.initMatrix(-mViewRect.halfW, mViewRect.halfW, -mViewRect.halfH, mViewRect.halfH);
    computeMaxMeshCount();
    createPages();
}