Intercept GL_VERSION string request in Evas GL

[bbrto21]

• Evas GL's glGetString doesn't handle GL_VERSION string request.
  So it intercepts this request and always returns the 2.1 version string.
• Downgrade the version of tizen_evas_gl_helper.h to Evas_GL_GLES2.

Signed-off-by: Boram Bae boram21.bae@samsung.com

[JSUYA]

In tizen's efl, glGetString(GL_VERSION) does not work properly.
(https://review.tizen.org/gerrit/#/c/platform/upstream/efl/+/178697/)
(You will need a review.tizen.org ID to view this link.)

commit efb1d367be87977c584f50764de3e3f233a720f2
Author: Daekwang Ryu <dkdk.ryu@samsung.com>
Date:   Fri May 11 18:51:59 2018 +0900

    evas_gl: remove GL_VERSION wrapper
    
    because some drivers return a context of later version not specified version.
    
    Change-Id: I4fc4567ccdefd63f422812d1f7461d13e1e547b3

diff --git a/src/modules/evas/engines/gl_common/evas_gl_api.c b/src/modules/evas/engines/gl_common/evas_gl_api.c
index 84bd943076..6c3a44a731 100755
--- a/src/modules/evas/engines/gl_common/evas_gl_api.c
+++ b/src/modules/evas/engines/gl_common/evas_gl_api.c
@@ -1471,7 +1471,7 @@ _evgl_glGetString(GLenum name)
 {
    static char _version[128] = {0};
    static char _glsl[128] = {0};
-   const char *ret, *version_extra;
+   const char *ret;
    EVGL_Resource *rsc;
    EVGL_Context *ctx;
 
@@ -1521,19 +1521,6 @@ _evgl_glGetString(GLenum name)
         return (const GLubyte *) _glsl;
 #endif
 
-      case GL_VERSION:
-        ret = (const char *) EVGL_TH(glGetString, GL_VERSION);
-        if (!ret) return NULL;
-#ifdef GL_GLES
-        version_extra = ret + 10;
-#else
-        version_extra = ret;
-#endif
-        snprintf(_version, sizeof(_version), "OpenGL ES %d.%d Evas GL (%s)",
-                 (int) ctx->version, ctx->version_minor, version_extra);
-        _version[sizeof(_version) - 1] = '\0';
-        return (const GLubyte *) _version;
-
       case GL_EXTENSIONS:
         // Passing the version -  GLESv2/GLESv3.
         return (GLubyte *) evgl_api_ext_string_get(EINA_TRUE, rsc->current_ctx->version);

That's why I think CustomGlGetString is appropriate.

[swift-kim]

@JSUYA Please make sure to clean up the commit message before you merge a PR.

* Fix a typo

Signed-off-by: Boram Bae <boram21.bae@samsung.com>

This kind of thing should not be included in the final commit message.

[JSUYA]

@JSUYA Please make sure to clean up the commit message before you merge a PR.

* Fix a typo

Signed-off-by: Boram Bae <boram21.bae@samsung.com>

This kind of thing should not be included in the final commit message.

OK I will be careful