egl: handle EGL_PROTECTED_CONTENT_EXT for eglImage

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5096>

src/egl/main/eglimage.c

@@ -58,6 +58,12 @@ _eglParseKHRImageAttribs(_EGLImageAttribs *attrs, _EGLDisplay *disp,
 
       attrs->GLTextureZOffset = val;
       break;
+   case EGL_PROTECTED_CONTENT_EXT:
+      if (!disp->Extensions.EXT_protected_content)
+         return EGL_BAD_PARAMETER;
+
+      attrs->ProtectedContent = val;
+      break;
    default:
       return EGL_BAD_PARAMETER;
    }

src/egl/main/eglimage.h

@@ -79,6 +79,9 @@ struct _egl_image_attribs
    struct _egl_image_attrib_int DMABufSampleRangeHint;
    struct _egl_image_attrib_int DMABufChromaHorizontalSiting;
    struct _egl_image_attrib_int DMABufChromaVerticalSiting;
+
+   /* EGL_EXT_protected_surface */
+   EGLBoolean ProtectedContent;
 };
 
 /**