Method GetFrame

src/effects/SphericalProjection.cpp:62–372

} // namespace

std::shared_ptr<openshot::Frame>
SphericalProjection::GetFrame(std::shared_ptr<openshot::Frame> frame,
								int64_t frame_number) {
	auto img = frame->GetImage();
	if (img->format() != QImage::Format_ARGB32)
	*img = img->convertToFormat(QImage::Format_ARGB32);

	int W = img->width(), H = img->height();
	int bpl = img->bytesPerLine();
	uchar *src = img->bits();

	QImage output(W, H, QImage::Format_ARGB32);
	output.fill(Qt::black);
	uchar *dst = output.bits();
	int dst_bpl = output.bytesPerLine();

	// Keyframes / angles
	const double DEG = M_PI / 180.0;
	double yaw_r        = -yaw.GetValue(frame_number)     * DEG; // drag right -> look right
	double pitch_r    =    pitch.GetValue(frame_number) * DEG; // drag up        -> look up
	double roll_r     = -roll.GetValue(frame_number)    * DEG; // positive slider -> clockwise on screen
	double in_fov_r =    in_fov.GetValue(frame_number) * DEG;
	double out_fov_r=    fov.GetValue(frame_number)        * DEG;

	// Apply invert as a 180° yaw for equirect inputs (camera-centric; no mirroring)
	if (input_model == INPUT_EQUIRECT && invert == INVERT_BACK) {
		yaw_r += M_PI;
	}

	// Rotation R = Ry(yaw) * Rx(pitch). (Roll applied in screen space.)
	double sy = sin(yaw_r),    cy = cos(yaw_r);
	double sp = sin(pitch_r),cp = cos(pitch_r);

	double r00 =    cy;
	double r01 =    sy * sp;
	double r02 =    sy * cp;

	double r10 =    0.0;
	double r11 =    cp;
	double r12 = -sp;

	double r20 = -sy;
	double r21 =    cy * sp;
	double r22 =    cy * cp;

	// Keep roll clockwise on screen regardless of facing direction
	double roll_sign = (r22 >= 0.0) ? 1.0 : -1.0;

	// Perspective scalars (rectilinear)
	double hx = tan(out_fov_r * 0.5);
	double vy = hx * double(H) / W;

	auto q = [](double a) { return std::llround(a * 1e6); };
	bool recompute = uv_map.empty() || W != cached_width || H != cached_height ||
					 q(yaw_r) != q(cached_yaw) ||
					 q(pitch_r) != q(cached_pitch) ||
					 q(roll_r) != q(cached_roll) ||
					 q(in_fov_r) != q(cached_in_fov) ||