Small changes...

1 files changed, 46 insertions, 0 deletions

diff --git a/linuxgraphicsdrivers.lyx b/linuxgraphicsdrivers.lyx
index f522b60..d0a315c 100644
--- a/linuxgraphicsdrivers.lyx
+++ b/linuxgraphicsdrivers.lyx
@@ -3036,6 +3036,34 @@ To attain better cache locality, the textures and surface are often tiled.
 Overlays and hardware sprites
 \end_layout
 
+\begin_layout Standard
+
+\lang english
+Overlays and hardware sprites happen at the scanout stage.
+\end_layout
+
+\begin_layout Standard
+
+\lang english
+Common use is for mouse pointer and play movies.
+\end_layout
+
+\begin_layout Standard
+
+\lang english
+On embedded platforms, the overlays can be used to avoid repeatedly blitting
+ the same surface
+\end_layout
+
+\begin_layout Standard
+Overlay pixel formats, RGB/RGBA/YUV/YUVA...
+\end_layout
+
+\begin_layout Standard
+Which overlay to scanout from is usually picked by either a priority, or
+ a colorkey
+\end_layout
+
 \begin_layout Subsubsection*
 
 \lang english
@@ -4903,6 +4931,12 @@ Draws a solid rectangle
 \begin_layout Standard
 
 \lang english
+Draws a solid rectangle on the framebuffer.
+\end_layout
+
+\begin_layout Standard
+
+\lang english
 \begin_inset ERT
 status open
 
@@ -4940,6 +4974,12 @@ Copy data from area to another
 \begin_layout Standard
 
 \lang english
+This is mostly useful for accelerating console scrolling.
+\end_layout
+
+\begin_layout Standard
+
+\lang english
 \begin_inset ERT
 status open
 
@@ -5084,6 +5124,12 @@ Wait for blit idle, optional
 \begin_layout Standard
 
 \lang english
+It will be called by the cfb_* fallback functions if it's available.
+\end_layout
+
+\begin_layout Standard
+
+\lang english
 \begin_inset ERT
 status open