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Partial Rendering refers to a rendering technique where only a portion of the scene or screen is updated, rather than redrawing the entire output. It is commonly used as a performance optimization strategy, focusing on redrawing only the regions that have changed, often called dirty regions. This introduces RenderDirtyRegion, which assists in collecting a compact dirty region from render tasks. To efficient data-processing, this divide the screen region with a designated size of partition and handles the partitl rendering computation with a divide-conquer metholodgy. Each backend can utilize this class to support efficient partial rendering. This is implemented using a Line Sweep and Subdivision Merging O(NlogN). The basic per-frame workflow is as follows: 0. RenderDirtyRegion::init() //set the screen size to properly partition the regions 1. RenderDirtyRegion::prepare() //Call this in Renderer::preRender(). 2. RenderDirtyRegion::add() //Add all dirty paints for the frame before rendering. 3. RenderDirtyRegion::commit() //Generate the partial rendering region list before rendering. 4. RenderDirtyRegion::partition() //Get a certian partition 5. RenderDirtyRegion::get() //Retrieve the current dirty region list of a partition and use it when drawing paints. 6. RenderDirtyRegion::clear() //Reset the state. RenderMethod introduced for 2 utilities for paritial renderings 1. RenderMethod::damage() //add a force dirty region, especially useful for scene effects 2. RenderMethod::partial() //toggle the partial rendering feature issue: https://github.com/thorvg/thorvg/issues/1747 |
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| .. | ||
| gl_engine | ||
| sw_engine | ||
| wg_engine | ||
| meson.build | ||
| tvgAccessor.cpp | ||
| tvgAnimation.cpp | ||
| tvgAnimation.h | ||
| tvgCanvas.cpp | ||
| tvgCanvas.h | ||
| tvgCommon.h | ||
| tvgFill.cpp | ||
| tvgFill.h | ||
| tvgFrameModule.h | ||
| tvgGlCanvas.cpp | ||
| tvgInitializer.cpp | ||
| tvgIteratorAccessor.h | ||
| tvgLoader.cpp | ||
| tvgLoader.h | ||
| tvgLoadModule.h | ||
| tvgPaint.cpp | ||
| tvgPaint.h | ||
| tvgPicture.cpp | ||
| tvgPicture.h | ||
| tvgRender.cpp | ||
| tvgRender.h | ||
| tvgSaveModule.h | ||
| tvgSaver.cpp | ||
| tvgScene.cpp | ||
| tvgScene.h | ||
| tvgShape.cpp | ||
| tvgShape.h | ||
| tvgSwCanvas.cpp | ||
| tvgTaskScheduler.cpp | ||
| tvgTaskScheduler.h | ||
| tvgText.cpp | ||
| tvgText.h | ||
| tvgWgCanvas.cpp | ||