EGL 1.4 Specification says that
eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT) can be
used to release the
current thread's ownership on the surfaces and context.
MESA's egl implementation was only accepting the parameters when the
KHR_surfaceless_context
extension is supported.
---
src/egl/main/eglapi.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/src/egl/main/eglapi.c b/src/egl/main/eglapi.c
index 950c447..a5def55 100644
--- a/src/egl/main/eglapi.c
+++ b/src/egl/main/eglapi.c
@@ -486,7 +486,12 @@ eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface
read,
if (!context && ctx != EGL_NO_CONTEXT)
RETURN_EGL_ERROR(disp, EGL_BAD_CONTEXT, EGL_FALSE);
- if (!draw_surf || !read_surf) {
+
+ /* surfaces may both be EGL_NO_SURFACE and context be EGL_NO_CONTEXT,
+ releasing the current thread's ownership on the resources
+ (EGL 1.4 Specification, Section 3.7.3) */
+ if ((draw != EGL_NO_SURFACE || read != EGL_NO_SURFACE || ctx !=
EGL_NO_CONTEXT) &&
+ (!draw_surf || !read_surf)) {
/* surfaces may be NULL if surfaceless */
if (!disp->Extensions.KHR_surfaceless_context)
RETURN_EGL_ERROR(disp, EGL_BAD_SURFACE, EGL_FALSE);
--
1.9.0
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