Method GetFrame

src/effects/Blur.cpp:50–93

This method is required for all derived classes of EffectBase, and returns a modified openshot::Frame object

// This method is required for all derived classes of EffectBase, and returns a
// modified openshot::Frame object
std::shared_ptr<openshot::Frame> Blur::GetFrame(std::shared_ptr<openshot::Frame> frame, int64_t frame_number)
{
	// Get the frame's image
	std::shared_ptr<QImage> frame_image = frame->GetImage();

	// Get the current blur radius
	int horizontal_radius_value = horizontal_radius.GetValue(frame_number);
	int vertical_radius_value = vertical_radius.GetValue(frame_number);
	float sigma_value = sigma.GetValue(frame_number);
	int iteration_value = iterations.GetInt(frame_number);
	(void) sigma_value;

	int w = frame_image->width();
	int h = frame_image->height();

	// Grab two copies of the image pixel data
	QImage image_copy = frame_image->copy();
	std::shared_ptr<QImage> frame_image_2 = std::make_shared<QImage>(image_copy);

	// Loop through each iteration
	for (int iteration = 0; iteration < iteration_value; ++iteration)
	{
		// HORIZONTAL BLUR (if any)
		if (horizontal_radius_value > 0.0) {
			// Apply horizontal blur to target RGBA channels
			boxBlurH(frame_image->bits(), frame_image_2->bits(), w, h, horizontal_radius_value);

			// Swap output image back to input
			frame_image.swap(frame_image_2);
		}

		// VERTICAL BLUR (if any)
		if (vertical_radius_value > 0.0) {
			// Apply vertical blur to target RGBA channels
			boxBlurT(frame_image->bits(), frame_image_2->bits(), w, h, vertical_radius_value);

			// Swap output image back to input
			frame_image.swap(frame_image_2);
		}
	}

	// return the modified frame
	return frame;
}

bool Blur::UseCustomMaskBlend(int64_t frame_number) const {
	(void) frame_number;