Current implementation of eglCreateWindowSurface() is against to the EGL
specification, because it allows creating multiple surfaces per single window.
---
src/egl/main/eglapi.c | 109 +++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 107 insertions(+), 2 deletions(-)
diff --git a/src/egl/main/eglapi.c b/src/egl/main/eglapi.c
index fbb14f1..3eb9fb6 100644
--- a/src/egl/main/eglapi.c
+++ b/src/egl/main/eglapi.c
@@ -102,6 +102,96 @@
#include "eglsync.h"
#include "eglstring.h"
+/**
+ * Bi direction linked list item structure for carrying window and surface
fields.
+ */
+struct _window_list_item
+{
+ struct _window_list_item *prev;
+ struct _window_list_item *next;
+ EGLNativeWindowType native_window;
+ EGLSurface attached_surface;
+};
+
+typedef struct _window_list_item window_list_item;
+
+struct _window_list_item *window_surface_association_list_head = NULL;
+struct _window_list_item *window_surface_association_list_tail = NULL;
+
+static inline bool _isWindowAssociatedWithSurface(EGLNativeWindowType window)
+{
+ struct _window_list_item *it = window_surface_association_list_head;
+ for (; it != NULL; it = it->next)
+ {
+ if (it->native_window == window)
+ {
+ return true;
+ }
+ }
+ return false;
+}
+
+static inline void _associateWindowWithSurfaceList(EGLNativeWindowType window,
EGLSurface surface)
+{
+ window_list_item * new_list_item = malloc(sizeof(window_list_item));
+ memset(new_list_item, 0, sizeof(window_list_item));
+
+ new_list_item->native_window = window;
+ new_list_item->attached_surface = surface;
+
+ if (window_surface_association_list_tail)
+ {
+ window_surface_association_list_tail->next = new_list_item;
+ new_list_item->prev = window_surface_association_list_tail;
+
+ window_surface_association_list_tail = new_list_item;
+ }
+ else
+ {
+ window_surface_association_list_head = new_list_item;
+ window_surface_association_list_tail = new_list_item;
+ }
+}
+
+static inline void _disassociateWindowWithSurfaceList(EGLSurface surface)
+{
+ if (window_surface_association_list_head != NULL)
+ {
+ if (window_surface_association_list_head ==
window_surface_association_list_tail &&
+ window_surface_association_list_head->attached_surface ==
surface)
+ {
+ free(window_surface_association_list_head);
+ window_surface_association_list_head = NULL;
+ window_surface_association_list_tail = NULL;
+ }
+ else
+ {
+ struct _window_list_item * it =
window_surface_association_list_head;
+
+ for (;it != NULL; it = it->next)
+ {
+ if (it->attached_surface == surface)
+ {
+ struct _window_list_item *next_element = it->next;
+ struct _window_list_item *prev_element = it->prev;
+
+ free (it);
+
+ if (prev_element)
+ prev_element->next = next_element;
+ if (next_element)
+ next_element->prev = prev_element;
+
+ if (it == window_surface_association_list_tail)
+ window_surface_association_list_tail = prev_element;
+
+ if (it == window_surface_association_list_head)
+ window_surface_association_list_head = next_element;
+ }
+ }
+ }
+ }
+}
/**
* Macros to help return an API entrypoint.
@@ -690,9 +780,20 @@ eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config,
EGLNativeWindowType window, const EGLint *attrib_list)
{
_EGLDisplay *disp = _eglLockDisplay(dpy);
+ EGLSurface window_surface = NULL;
STATIC_ASSERT(sizeof(void*) == sizeof(window));
- return _eglCreateWindowSurfaceCommon(disp, config, (void*) window,
- attrib_list);
+
+ //check if window have already created surface to it
+ if (_isWindowAssociatedWithSurface(window))
+ RETURN_EGL_ERROR(disp, EGL_BAD_ALLOC, EGL_NO_SURFACE);
+
+ window_surface = _eglCreateWindowSurfaceCommon(disp, config, (void*) window,
+ attrib_list);
+ //add window with attached surface to list,
+ //it will be freed when eglDestroySurface will be called
+ if (window_surface != EGL_NO_SURFACE)
+ _associateWindowWithSurfaceList(window, window_surface);
+
+ return window_surface;
}
@@ -805,6 +906,9 @@ eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
_eglUnlinkSurface(surf);
ret = drv->API.DestroySurface(drv, disp, surf);
+ //remove surface association with window if exist
+ _disassociateWindowWithSurfaceList(surface);
+
RETURN_EGL_EVAL(disp, ret);
}
--
2.7.0.rc3
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