[Mesa-dev] [PATCH 2/3] st/dri: Support EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR/GLX_CONTEXT_DEBUG_BIT_ARB on ES contexts.

[jfonseca at vmware.com]

From: José Fonseca <jfonseca at vmware.com>

The latest version of the specs explicitly allow it, and given that Mesa
universally supports KHR_debug we should definitely support it.

Totally untested.  (Just happened to noticed this while implementing
GLX_EXT_create_context_es2_profile for st/xlib.)
---
 src/gallium/state_trackers/dri/dri_context.c |  6 +++---
 src/mesa/drivers/dri/common/dri_util.c       | 14 ++++++--------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/src/gallium/state_trackers/dri/dri_context.c b/src/gallium/state_trackers/dri/dri_context.c
index fe3240a..84b8807 100644
--- a/src/gallium/state_trackers/dri/dri_context.c
+++ b/src/gallium/state_trackers/dri/dri_context.c
@@ -72,9 +72,6 @@ dri_create_context(gl_api api, const struct gl_config * visual,
       attribs.major = major_version;
       attribs.minor = minor_version;
 
-      if ((flags & __DRI_CTX_FLAG_DEBUG) != 0)
-	 attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
-
       if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 	 attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
       break;
@@ -83,6 +80,9 @@ dri_create_context(gl_api api, const struct gl_config * visual,
       goto fail;
    }
 
+   if ((flags & __DRI_CTX_FLAG_DEBUG) != 0)
+      attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
+
    if (flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE)) {
       *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
       goto fail;
diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index 02499f2..d6e875f 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -376,19 +376,17 @@ driCreateContextAttribs(__DRIscreen *screen, int api,
        return NULL;
     }
 
-    /* The EGL_KHR_create_context spec says:
+    /* The latest version of EGL_KHR_create_context spec says:
      *
-     *     "Flags are only defined for OpenGL context creation, and specifying
-     *     a flags value other than zero for other types of contexts,
-     *     including OpenGL ES contexts, will generate an error."
+     *     "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
+     *     EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
+     *     [...] This bit is supported for OpenGL and OpenGL ES contexts.
      *
-     * The GLX_EXT_create_context_es2_profile specification doesn't say
-     * anything specific about this case.  However, none of the known flags
-     * have any meaning in an ES context, so this seems safe.
+     * None of the other flags have any meaning in an ES context, so this seems safe.
      */
     if (mesa_api != API_OPENGL_COMPAT
         && mesa_api != API_OPENGL_CORE
-        && flags != 0) {
+        && (flags & ~__DRI_CTX_FLAG_DEBUG)) {
 	*error = __DRI_CTX_ERROR_BAD_FLAG;
 	return NULL;
     }
-- 
2.1.1