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[client] egl: improve cursor damage logic

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1. Use atomics and return exact cursor positions from egl_cursor_render
   to avoid race conditions between cursor render and update.
2. Instead of messing with lastCursorValid in various overlays, simply use
   the hasOverlay/hadOverlay logic for cursor damage. This simplifies the
   logic greatly.

As a result, I believe all cursor-related artifacts are fixed.

Note to reviewer: as atomic_init and atomic_store are implemented as macros,
it is currently not possible to pass structs as compound literals due to the
comma being interpreted as an argument separator by the preprocessor.
This commit is contained in:
Quantum
2021-07-19 18:36:22 -04:00
committed by Geoffrey McRae
parent b4dc021381
commit 563ad18f4e
3 changed files with 58 additions and 59 deletions
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5
client/renderers/EGL/cursor.h
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@@ -47,6 +47,5 @@ void egl_cursor_set_size(EGL_Cursor * cursor, const float x, const float y);
void egl_cursor_set_state(EGL_Cursor * cursor, const bool visible,
const float x, const float y);
struct CursorState egl_cursor_get_state(EGL_Cursor * cursor, int width, int height);
void egl_cursor_render(EGL_Cursor * cursor, LG_RendererRotate rotate);
struct CursorState egl_cursor_render(EGL_Cursor * cursor, LG_RendererRotate rotate,
int width, int height);