Changes between Version 5 and Version 6 of DisplayLists

Timestamp:

Nov 17, 2015, 10:06:06 AM (9 years ago)

Author:

Jon Davis

Comment:

--

DisplayLists

@@ -25 +25 @@
 * Reduces expensive traversal of the render tree for each tile
 * Converts some paints to pure display-list operations, such as:
-** GIF animation, CSS animations, scrolling
+ * GIF animation, CSS animations, scrolling
 * We can also potentially use display lists to paint off the main thread
 
@@ -32 +32 @@
 * Many optimizations we can fit in to our existing code as one-off optimizations, but display lists provide a common way of reasoning about these optimizations
 * Make WK code more efficient by eliminating useless repaints, using precomputed display lists
-** Better culling (accurate extent information): we can use the display list to compute the exact bounds of what needs to be repainted, allowing us to tighten the repaint rect
-** Can optimize noops out of the painting code
-** Occlusion detection and clipping
-** Can reorder operations for better batching
+ * Better culling (accurate extent information): we can use the display list to compute the exact bounds of what needs to be repainted, allowing us to tighten the repaint rect
+ * Can optimize noops out of the painting code
+ * Occlusion detection and clipping
+ * Can reorder operations for better batching
 * Reuse display lists in a single painting pass (e.g. SVG images, <use>)
 * Can keep display lists around between painting passes (e.g. across different tiles)
 * We have opportunities to cache display lists
-** Text rendering: don’t have to recompute kerning, glyphs (?)
+ * Text rendering: don’t have to recompute kerning, glyphs (?)
 * We can log all the painting commands that happen
-** Developer tools implications: can use display list logs to tell which elements are the most costly to render, or perhaps scrub through the painting of a page
-** Can also use display lists to help layout testing
+ * Developer tools implications: can use display list logs to tell which elements are the most costly to render, or perhaps scrub through the painting of a page
+ * Can also use display lists to help layout testing
 
 == What are the biggest challenges? ==