Function ViewportDoDraw

src/viewport.cpp:1811–1876

}

void ViewportDoDraw(const Viewport &vp, int left, int top, int right, int bottom)
{
	_vd.dpi.zoom = vp.zoom;
	int mask = ScaleByZoom(-1, vp.zoom);

	_vd.combine_sprites = SPRITE_COMBINE_NONE;

	_vd.dpi.width = (right - left) & mask;
	_vd.dpi.height = (bottom - top) & mask;
	_vd.dpi.left = left & mask;
	_vd.dpi.top = top & mask;
	_vd.dpi.pitch = _cur_dpi->pitch;
	_vd.last_child = LAST_CHILD_NONE;

	int x = UnScaleByZoom(_vd.dpi.left - (vp.virtual_left & mask), vp.zoom) + vp.left;
	int y = UnScaleByZoom(_vd.dpi.top - (vp.virtual_top & mask), vp.zoom) + vp.top;

	_vd.dpi.dst_ptr = BlitterFactory::GetCurrentBlitter()->MoveTo(_cur_dpi->dst_ptr, x - _cur_dpi->left, y - _cur_dpi->top);
	AutoRestoreBackup dpi_backup(_cur_dpi, &_vd.dpi);

	ViewportAddLandscape();
	ViewportAddVehicles(&_vd.dpi);

	ViewportAddKdtreeSigns(&_vd.dpi);

	DrawTextEffects(&_vd.dpi);

	if (!_vd.tile_sprites_to_draw.empty()) ViewportDrawTileSprites(&_vd.tile_sprites_to_draw);

	for (auto &psd : _vd.parent_sprites_to_draw) {
		_vd.parent_sprites_to_sort.push_back(&psd);
	}

	_vp_sprite_sorter(&_vd.parent_sprites_to_sort);
	ViewportDrawParentSprites(&_vd.parent_sprites_to_sort, &_vd.child_screen_sprites_to_draw);

	if (_draw_bounding_boxes) ViewportDrawBoundingBoxes(&_vd.parent_sprites_to_sort);
	if (_draw_dirty_blocks) ViewportDrawDirtyBlocks();

	DrawPixelInfo dp = _vd.dpi;
	ZoomLevel zoom = _vd.dpi.zoom;
	dp.zoom = ZoomLevel::Min;
	dp.width = UnScaleByZoom(dp.width, zoom);
	dp.height = UnScaleByZoom(dp.height, zoom);
	AutoRestoreBackup cur_dpi(_cur_dpi, &dp);

	if (vp.overlay != nullptr && vp.overlay->GetCargoMask() != 0 && vp.overlay->GetCompanyMask().Any()) {
		/* translate to window coordinates */
		dp.left = x;
		dp.top = y;
		vp.overlay->Draw(&dp);
	}

	if (!_vd.string_sprites_to_draw.empty()) {
		/* translate to world coordinates */
		dp.left = UnScaleByZoom(_vd.dpi.left, zoom);
		dp.top = UnScaleByZoom(_vd.dpi.top, zoom);
		ViewportDrawStrings(zoom, &_vd.string_sprites_to_draw);