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Let userland retain the window backing store while drawing into it.

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To start painting, call:
gui$get_window_backing_store()

Then finish up with:
gui$release_window_backing_store()

Process will retain the underlying GraphicsBitmap behind the scenes.
This fixes racing between the WindowServer and GUI clients.

This patch also adds a WSWindowLocker that is exactly what it sounds like.
This commit is contained in:
Andreas Kling 2019-01-24 23:40:12 +01:00
parent ccf3fc4618
commit 86eae0f8df
22 changed files with 244 additions and 102 deletions
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4
LibC/errno_numbers.h
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@ -42,7 +42,9 @@
__ERROR(ENOTIMPL, "Not implemented") \
__ERROR(EAFNOSUPPORT, "Address family not supported") \
__ERROR(EWHYTHO, "Failed without setting an error code (Bug!)") \
__ERROR(EBADWINDOW, "Bad Window ID") \
__ERROR(EBADWINDOW, "Bad window ID") \
__ERROR(EBADBACKING, "Bad backing store ID") \
enum __errno_values {
#undef __ERROR