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

Browse source 
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
View file

@ -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

26
LibC/gui.cpp
View file

@ -21,14 +21,32 @@ int gui_get_window_backing_store(int window_id, GUI_WindowBackingStoreInfo* info
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int gui_get_window_parameters(int window_id, GUI_WindowParameters* params)
int gui_release_window_backing_store(void* backing_store_id)
{
int rc = syscall(SC_gui_get_window_parameters, window_id, params);
int rc = syscall(SC_gui_release_window_backing_store, backing_store_id);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int gui_set_window_parameters(int window_id, const GUI_WindowParameters* params)
int gui_get_window_title(int window_id, char* buffer, size_t size)
{
int rc = syscall(SC_gui_set_window_parameters, window_id, params);
int rc = syscall(SC_gui_get_window_title, window_id, buffer, size);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int gui_set_window_title(int window_id, const char* title, size_t length)
{
int rc = syscall(SC_gui_set_window_title, window_id, title, length);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int gui_get_window_rect(int window_id, GUI_Rect* rect)
{
int rc = syscall(SC_gui_get_window_rect, window_id, rect);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int gui_set_window_rect(int window_id, const GUI_Rect* rect)
{
int rc = syscall(SC_gui_set_window_rect, window_id, rect);
__RETURN_WITH_ERRNO(rc, rc, -1);
}

7
LibC/gui.h
View file

@ -8,8 +8,11 @@ __BEGIN_DECLS
int gui_create_window(const GUI_WindowParameters*);
int gui_invalidate_window(int window_id, const GUI_Rect*);
int gui_get_window_backing_store(int window_id, GUI_WindowBackingStoreInfo*);
int gui_get_window_parameters(int window_id, GUI_WindowParameters*);
int gui_set_window_parameters(int window_id, const GUI_WindowParameters*);
int gui_release_window_backing_store(void* backing_store_id);
int gui_get_window_title(int window_id, char*, size_t);
int gui_set_window_title(int window_id, const char*, size_t);
int gui_get_window_rect(int window_id, GUI_Rect*);
int gui_set_window_rect(int window_id, const GUI_Rect*);
__END_DECLS