纯手绘的MyGUI类图、渲染流程图
MyGUI (version 3.2 preview) class diagrams and render flow charts, sketched by liigo. 2011-12-16.
init:
IRenderTarget, RenderManager, Vertex, IVertexBuf, ITexture, DirectXRenderMananger:
BaseManager, LayerManager, ILayer,
ILayNode, ILayerItem:
LayerManager tree:
2011-12-20 liigo 更新上图如下图，主要补充了Layer和LayerNode的渲染内容：
LayerManager tree, Layer.renderToTarget(),
LayerNode.renderToTarget():
RenderItem,
ISubWidget:
DirectXRenderManage.doRender(...)
ISubWidget.createDrawItem(...):
MyGUI渲染流程总结：BaseManager.run() -> while(PeekMessage())... BaseManager.drawOneFrame() -> IDirect3DDevice9.BeginScene() ->RenderManager.drawOneFrame -> RenderManager.onFrameEvent(), begin()|SetRenderStates, onRenderToTarget() end() ->LayerManager.renderToTarget() -> ILayer.renderToTarget() -> ILayerNode.renderToTarget() -> RenderItem.renderToTarget() ->ISubWidget.doRender() to IVertexBuffer, DirectXRenderManager.doRender() ->IDirect3DDevice9.SetStreamSource() to IVertexBuffer->IDirect3DDevice9.DrawPrimitive(D3DPT_TRIANGLELIST, ...) ...and last, IDirect3DDevice9.EndScene,IDirect3DDevice9.Present().
整个渲染流程的核心是ISubWidget.doRender() 生成顶点数据（含坐标/颜色/纹理）到 IVertexBuffer，喂入IDirect3DDevice9.DrawPrimitive() 。文/liigo
以上内容为草记，主要便于自己理解。目前理解的层次有限，暂不奢求对外人有多少帮助。