Method drawBackground

src/OpenLoco/src/Ui/Widgets/FrameWidget.cpp:73–108

    }

    void Frame::drawBackground(Gfx::DrawingContext& drawingCtx, const Widget& widget, const WidgetState& widgetState)
    {
        const auto* window = widgetState.window;
        const auto pos = window->position() + widget.position();
        const auto size = widget.size();

        const auto& rt = drawingCtx.currentRenderTarget();
        const auto clipped = Gfx::clipRenderTarget(rt, Ui::Rect(pos.x, pos.y, size.width, 41));
        if (clipped)
        {
            uint32_t imageId = widget.image;
            if (window->hasFlags(WindowFlags::lighterFrame))
            {
                imageId = Gfx::recolour(ImageIds::frame_background_image, widgetState.colour.c());
            }
            else
            {
                imageId = Gfx::recolour(ImageIds::frame_background_image_alt, widgetState.colour.c());
            }

            drawingCtx.pushRenderTarget(*clipped);

            // Derive the number of background images to paint
            const auto backgroundImageWidth = Gfx::getG1Element(imageId)->width;
            const auto numPassesNeeded = (widget.width() + backgroundImageWidth - 1) / backgroundImageWidth;

            // Draw background image repeatedly to account for large windows
            // NB: starting on the right side to counter the border on the left side of the sprite
            for (auto i = numPassesNeeded; i >= 0; i--)
            {
                drawingCtx.drawImage(i * (backgroundImageWidth - 1), 0, imageId);
            }

            drawingCtx.popRenderTarget();
        }
    }

    void Frame::drawSolid(Gfx::DrawingContext& drawingCtx, const Widget& widget, const WidgetState& widgetState)
    {