Function DrawMouseCursor

src/gfx.cpp:1352–1414

}

void DrawMouseCursor()
{
	/* Don't draw mouse cursor if it is handled by the video driver. */
	if (VideoDriver::GetInstance()->UseSystemCursor()) return;

	/* Don't draw the mouse cursor if the screen is not ready */
	if (_screen.dst_ptr == nullptr) return;

	Blitter *blitter = BlitterFactory::GetCurrentBlitter();

	/* Redraw mouse cursor but only when it's inside the window */
	if (!_cursor.in_window) return;

	/* Don't draw the mouse cursor if it's already drawn */
	if (_cursor.visible) {
		if (!_cursor.dirty) return;
		UndrawMouseCursor();
	}

	/* Determine visible area */
	int left = _cursor.pos.x + _cursor.total_offs.x;
	int width = _cursor.total_size.x;
	if (left < 0) {
		width += left;
		left = 0;
	}
	if (left + width > _screen.width) {
		width = _screen.width - left;
	}
	if (width <= 0) return;

	int top = _cursor.pos.y + _cursor.total_offs.y;
	int height = _cursor.total_size.y;
	if (top < 0) {
		height += top;
		top = 0;
	}
	if (top + height > _screen.height) {
		height = _screen.height - top;
	}
	if (height <= 0) return;

	_cursor.draw_pos.x = left;
	_cursor.draw_pos.y = top;
	_cursor.draw_size.x = width;
	_cursor.draw_size.y = height;

	uint8_t *buffer = _cursor_backup.Allocate(blitter->BufferSize(_cursor.draw_size.x, _cursor.draw_size.y));

	/* Make backup of stuff below cursor */
	blitter->CopyToBuffer(blitter->MoveTo(_screen.dst_ptr, _cursor.draw_pos.x, _cursor.draw_pos.y), buffer, _cursor.draw_size.x, _cursor.draw_size.y);

	/* Draw cursor on screen */
	_cur_dpi = &_screen;
	for (const auto &cs : _cursor.sprites) {
		DrawSprite(cs.image.sprite, cs.image.pal, _cursor.pos.x + cs.pos.x, _cursor.pos.y + cs.pos.y);
	}