From 14799a7c2c298abf4a0b30f1ac1a95da7ea81a9e Mon Sep 17 00:00:00 2001
From: Minkyoung Kim <mer.kim@samsung.com>
Date: Wed, 18 Mar 2015 17:14:41 +0900
Subject: [PATCH] Evas GL: Wrap glGetString() for gles1.x.

This is backport from upstream :

  commit 9a0f5913144da3def33e246e0438c8529f367298
  Author: Minkyoung Kim <mer.kim@samsung.com>
  Date:   Tue Feb 24 19:32:35 2015 +0900

      Evas GL: Wrap glGetString() for gles1.x.

      Summary:
      - Implement glGetString() wrapper func in the same way as gles2.x.
      - Small bug fix glGetString() for gles2.x.

Change-Id: I54569c5d239fde17b17d7cc8334bca1fc67edc0e
---
 src/modules/evas/engines/gl_common/evas_gl_api.c   |  2 +-
 .../evas/engines/gl_common/evas_gl_api_gles1.c     | 58 ++++++++++++++++++++--
 2 files changed, 56 insertions(+), 4 deletions(-)

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 0f592d4..6cde550 100644
--- a/src/modules/evas/engines/gl_common/evas_gl_api.c
+++ b/src/modules/evas/engines/gl_common/evas_gl_api.c
@@ -695,7 +695,7 @@ _evgl_glGetString(GLenum name)
         ret = glGetString(GL_SHADING_LANGUAGE_VERSION);
         if (!ret) return NULL;
 #ifdef GL_GLES
-        if (ret[15] != (GLubyte) '1')
+        if (ret[18] != (GLubyte) '1')
           {
              // We try not to remove the vendor fluff
              snprintf(_glsl, sizeof(_glsl), "OpenGL ES GLSL ES 1.00 Evas GL (%s)", ((char *) ret) + 18);
diff --git a/src/modules/evas/engines/gl_common/evas_gl_api_gles1.c b/src/modules/evas/engines/gl_common/evas_gl_api_gles1.c
index c3448aa..1bddfe2 100644
--- a/src/modules/evas/engines/gl_common/evas_gl_api_gles1.c
+++ b/src/modules/evas/engines/gl_common/evas_gl_api_gles1.c
@@ -1015,11 +1015,63 @@ _evgl_gles1_glGetPointerv(GLenum pname, GLvoid **params)
 static const GLubyte *
 _evgl_gles1_glGetString(GLenum name)
 {
-   const GLubyte * ret;
+   static char _version[128] = {0};
+   EVGL_Resource *rsc;
+   const GLubyte *ret;
+
    if (!_gles1_api.glGetString)
      return NULL;
-   ret = _gles1_api.glGetString(name);
-   return ret;
+
+   if ((!(rsc = _evgl_tls_resource_get())) || !rsc->current_ctx)
+     {
+        ERR("Current context is NULL, not calling glGetString");
+        // This sets evas_gl_error_get instead of glGetError...
+        evas_gl_common_error_set(NULL, EVAS_GL_BAD_CONTEXT);
+        return NULL;
+     }
+
+   if (rsc->current_ctx->version != EVAS_GL_GLES_1_X)
+     {
+        ERR("Invalid context version %d", (int) rsc->current_ctx->version);
+        evas_gl_common_error_set(NULL, EVAS_GL_BAD_MATCH);
+        return NULL;
+     }
+
+   switch (name)
+     {
+      case GL_VENDOR:
+      case GL_RENDERER:
+      case GL_SHADING_LANGUAGE_VERSION:
+        break;
+      case GL_VERSION:
+        ret = glGetString(GL_VERSION);
+        if (!ret) return NULL;
+#ifdef GL_GLES
+        if (ret[13] != (GLubyte) '1')
+          {
+             // We try not to remove the vendor fluff
+             snprintf(_version, sizeof(_version), "OpenGL ES-CM 1.1 Evas GL (%s)", ((char *) ret) + 10);
+             _version[sizeof(_version) - 1] = '\0';
+             return (const GLubyte *) _version;
+          }
+        return ret;
+#else
+        // Desktop GL, we still keep the official name
+        snprintf(_version, sizeof(_version), "OpenGL ES-CM 1.1 Evas GL (%s)", (char *) ret);
+        _version[sizeof(_version) - 1] = '\0';
+        return (const GLubyte *) _version;
+#endif
+
+      case GL_EXTENSIONS:
+        return (GLubyte *) evgl_api_ext_string_get(EINA_TRUE, EVAS_GL_GLES_1_X);
+
+      default:
+        WRN("Unknown string requested: %x", (unsigned int) name);
+        break;
+     }
+
+   return _gles1_api.glGetString(name);
+
 }
 
 static void
-- 
2.7.4