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glx: Implement GLX_EXT_create_context_es2_profile

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This patch builds on the infrastucture put in place for
GLX_ARB_create_context_profile.  If GLX_CONTEXT_ES2_PROFILE_BIT_EXT is
specified and the requested version is 2.0, create a context with the
__DRI_API_GLES2 API.

This change assumes that any DRI2 driver can handle (possibly by saying "no
seeing an API setting other than __DRI_API_OPENGL or __DRI_API_OPENGL_CORE.
This allows enabling the extension any time GLX_ARB_create_context (and
GLX_ARB_create_context_profile) is enabled.

v2: Clean up some comments.  Note that our behavior for
GLX_CONTEXT_ES2_PROFILE_BIT_EXT w/version != 2.0 matches NVIDIA's.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Ian Romanick 2012-07-04 15:21:04 -07:00 • committed by Keith Packard
commit 41d5120eaf
4 changed files with 35 additions and 0 deletions
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26
glx/createcontext.c
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@ -229,6 +229,32 @@ __glXDisp_CreateContextAttribsARB(__GLXclientState * cl, GLbyte * pc)
case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
break;
case GLX_CONTEXT_ES2_PROFILE_BIT_EXT:
/* The GLX_EXT_create_context_es2_profile spec says:
*
* "... If the version requested is 2.0, and the
* GLX_CONTEXT_ES2_PROFILE_BIT_EXT bit is set in the
* GLX_CONTEXT_PROFILE_MASK_ARB attribute (see below), then the
* context returned will implement OpenGL ES 2.0."
*
* It also says:
*
* "* If attribute GLX_CONTEXT_PROFILE_MASK_ARB has no bits set;
* has any bits set other than
* GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
* GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, or
* GLX_CONTEXT_ES2_PROFILE_BIT_EXT; has more than one of these
* bits set; or if the implementation does not supported the
* requested profile, then GLXBadProfileARB is generated."
*
* It does not specifically say what is supposed to happen if
* GLX_CONTEXT_ES2_PROFILE_BIT_EXT is set but the version requested is
* not 2.0. We choose to generate GLXBadProfileARB as this matches
* NVIDIA's behavior.
*/
if (major_version != 2 || minor_version != 0)
return __glXError(GLXBadProfileARB);
break;
default:
return __glXError(GLXBadProfileARB);
}