Method get

core/src/processing/opengl/Texture.java:440–467

Copy texture to pixels. Involves video memory to main memory transfer (slow).

(int[] pixels)

   * Copy texture to pixels. Involves video memory to main memory transfer (slow).
   */
  public void get(int[] pixels) {
    if (pixels == null) {
      throw new RuntimeException("Trying to copy texture to null pixels array");
    }
    if (pixels.length != width * height) {
      throw new RuntimeException("Trying to copy texture to pixels array of " +
                                 "wrong size");
    }

    if (tempFbo == null) {
      tempFbo = new FrameBuffer(pg, glWidth, glHeight);
    }

    // Attaching the texture to the color buffer of a FBO, binding the FBO and
    // reading the pixels from the current draw buffer (which is the color
    // buffer of the FBO).
    tempFbo.setColorBuffer(this);
    pg.pushFramebuffer();
    pg.setFramebuffer(tempFbo);
    tempFbo.readPixels();
    pg.popFramebuffer();

    tempFbo.getPixels(pixels);
    convertToARGB(pixels);

    if (invertedX) flipArrayOnX(pixels, 1);
    if (invertedY) flipArrayOnY(pixels, 1);
  }


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