[waffle] [PATCH 4/6] egl: Add support for robust access contexts.

[Bas Nieuwenhuizen]

Signed-off-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
---
 src/waffle/egl/wegl_config.c  | 16 ++++++++++++++++
 src/waffle/egl/wegl_context.c |  9 +++++++++
 src/waffle/egl/wegl_display.c |  1 +
 src/waffle/egl/wegl_display.h |  1 +
 4 files changed, 27 insertions(+)

diff --git a/src/waffle/egl/wegl_config.c b/src/waffle/egl/wegl_config.c
index a79bc53..1c3f416 100644
--- a/src/waffle/egl/wegl_config.c
+++ b/src/waffle/egl/wegl_config.c
@@ -55,6 +55,22 @@ check_context_attrs(struct wegl_display *dpy,
         return false;
     }
 
+    if (attrs->context_robust && !dpy->EXT_create_context_robustness &&
+        attrs->context_api != WAFFLE_CONTEXT_OPENGL) {
+        wcore_errorf(WAFFLE_ERROR_UNSUPPORTED_ON_PLATFORM,
+                     "EGL_EXT_create_context_robustness is required in order to "
+                     "request a robust access context for OpenGL ES");
+        return false;
+    }
+
+    if (attrs->context_robust && !dpy->KHR_create_context &&
+        attrs->context_api == WAFFLE_CONTEXT_OPENGL) {
+        wcore_errorf(WAFFLE_ERROR_UNSUPPORTED_ON_PLATFORM,
+                     "EGL_KHR_create_context is required in order to "
+                     "request a robust access context for OpenGL");
+        return false;
+    }
+
     switch (attrs->context_api) {
         case WAFFLE_CONTEXT_OPENGL:
             if (!wcore_config_attrs_version_eq(attrs, 10) && !dpy->KHR_create_context) {
diff --git a/src/waffle/egl/wegl_context.c b/src/waffle/egl/wegl_context.c
index f4ee6cd..67cbc04 100644
--- a/src/waffle/egl/wegl_context.c
+++ b/src/waffle/egl/wegl_context.c
@@ -95,6 +95,11 @@ create_real_context(struct wegl_config *config,
                 context_flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
             }
 
+            if (attrs->context_robust) {
+                assert(dpy->KHR_create_context);
+                context_flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
+            }
+
             if (wcore_config_attrs_version_ge(attrs, 32))  {
                 assert(dpy->KHR_create_context);
                 switch (attrs->context_profile) {
@@ -128,6 +133,10 @@ create_real_context(struct wegl_config *config,
                 assert(attrs->context_minor_version == 0);
             }
 
+            if (attrs->context_robust) {
+                attrib_list[i++] = EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT;
+                attrib_list[i++] = EGL_TRUE;
+            }
             break;
 
         default:
diff --git a/src/waffle/egl/wegl_display.c b/src/waffle/egl/wegl_display.c
index 88fce7a..16af142 100644
--- a/src/waffle/egl/wegl_display.c
+++ b/src/waffle/egl/wegl_display.c
@@ -49,6 +49,7 @@ get_extensions(struct wegl_display *dpy)
     // pending emission.
     assert(wcore_error_get_code() == 0);
 
+    dpy->EXT_create_context_robustness = waffle_is_extension_in_string(extensions, "EGL_EXT_create_context_robustness");
     dpy->KHR_create_context = waffle_is_extension_in_string(extensions, "EGL_KHR_create_context");
 
     return true;
diff --git a/src/waffle/egl/wegl_display.h b/src/waffle/egl/wegl_display.h
index 43b83ef..b82a2ec 100644
--- a/src/waffle/egl/wegl_display.h
+++ b/src/waffle/egl/wegl_display.h
@@ -37,6 +37,7 @@ struct wcore_display;
 struct wegl_display {
     struct wcore_display wcore;
     EGLDisplay egl;
+    bool EXT_create_context_robustness;
     bool KHR_create_context;
 };
 
-- 
2.8.0