FabGL
ESP32 Display Controller and Graphics Library
|
Reads pixels inside the specified rectangle.
Screen reading may occur while other drawings are in progress, so the result may be not updated.
rect | Screen rectangle to read. To improve performance rectangle is not checked. |
destBuf | Destination buffer. Buffer size must be at least rect.width() * rect.height. |
Example:
// paint a red rectangle Canvas.setBrushColor(Color::BrightRed); Rect rect = Rect(10, 10, 100, 100); Canvas.fillRectangle(rect); // wait for vsync (hence actual drawing) VGAController.processPrimitives(); // read rectangle pixels into "buf" auto buf = new RGB222[rect.width() * rect.height()]; VGAController.readScreen(rect, buf); // write buf 110 pixels to the reight VGAController.writeScreen(rect.translate(110, 0), buf); delete buf;
Definition at line 499 of file vgacontroller.cpp.