Evas GL: use texture for native surface in glx backend

Summary:
EVAS_NATIVE_SURFACE_EVASGL uses egl image, but egl image is
not supported in glx backend, so use texture instead.

Test Plan: Local tests on pc

Reviewers: jpeg

Subscribers: cedric, mer.kim, mythri, wonsik

Differential Revision: https://phab.enlightenment.org/D2174

jpeg: fixed casts

src/modules/evas/engines/gl_common/evas_gl_core.c

@@ -833,9 +833,6 @@ _surface_cap_init(void *eng_data)
 static int
 _context_ext_check(EVGL_Context *ctx)
 {
-   int fbo_supported = 0;
-   int egl_image_supported = 0;
-
    if (!ctx)
       return 0;
 
@@ -843,6 +840,9 @@ _context_ext_check(EVGL_Context *ctx)
       return 1;
 
 #ifdef GL_GLES
+   int fbo_supported = 0;
+   int egl_image_supported = 0;
+
    switch (ctx->version)
      {
       case EVAS_GL_GLES_1_X:
@@ -858,13 +858,12 @@ _context_ext_check(EVGL_Context *ctx)
    if (EXTENSION_SUPPORT(EGL_KHR_image_base)
        && EXTENSION_SUPPORT(EGL_KHR_gl_texture_2D_image))
      egl_image_supported = 1;
-#else
-   fbo_supported = 1;
-   egl_image_supported = 0;
-#endif
 
    if (fbo_supported && egl_image_supported)
      ctx->fbo_image_supported = 1;
+#else
+   ctx->fbo_image_supported = 1;
+#endif
 
    ctx->extension_checked = 1;
 
@@ -2593,15 +2592,18 @@ evgl_safe_extension_get(const char *name, void **pfuncptr)
 }
 
 void *
-evgl_native_surface_egl_image_get(EVGL_Surface *sfc)
+evgl_native_surface_buffer_get(EVGL_Surface *sfc)
 {
    if (!evgl_engine)
      {
         ERR("Invalid input data.  Engine: %p", evgl_engine);
         return NULL;
      }
-
+#ifdef GL_GLES
    return sfc->egl_image;
+#else
+   return (void *)(uintptr_t)sfc->color_buf;
+#endif
 }
 
 int

src/modules/evas/engines/gl_common/evas_gl_core.h

@@ -21,7 +21,7 @@ EAPI void         evgl_engine_shutdown(void *eng_data);
 
 typedef void (*EVGL_Engine_Call)(void *eng_data);
 
-EAPI void        *evgl_native_surface_egl_image_get(EVGL_Surface *sfc);
+EAPI void        *evgl_native_surface_buffer_get(EVGL_Surface *sfc);
 
 typedef void *(*EVGL_Native_Surface_Call)(void *sfc);
 

src/modules/evas/engines/gl_x11/evas_engine.c

@@ -59,7 +59,7 @@ Evas_GL_Common_Context_Call glsym_evas_gl_common_image_all_unload = NULL;
 Evas_GL_Preload glsym_evas_gl_preload_init = NULL;
 Evas_GL_Preload glsym_evas_gl_preload_shutdown = NULL;
 EVGL_Engine_Call glsym_evgl_engine_shutdown = NULL;
-EVGL_Native_Surface_Call glsym_evgl_native_surface_egl_image_get = NULL;
+EVGL_Native_Surface_Call glsym_evgl_native_surface_buffer_get = NULL;
 Evas_Gl_Symbols glsym_evas_gl_symbols = NULL;
 
 Evas_GL_Common_Context_New glsym_evas_gl_common_context_new = NULL;
@@ -1275,7 +1275,7 @@ gl_symbols(void)
    LINK2GENERIC(evas_gl_preload_init);
    LINK2GENERIC(evas_gl_preload_shutdown);
    LINK2GENERIC(evgl_engine_shutdown);
-   LINK2GENERIC(evgl_native_surface_egl_image_get);
+   LINK2GENERIC(evgl_native_surface_buffer_get);
    LINK2GENERIC(evas_gl_symbols);
    LINK2GENERIC(evas_gl_common_error_get);
    LINK2GENERIC(evas_gl_common_error_set);
@@ -1936,9 +1936,9 @@ struct _Native
    Visual    *visual;
    void      *buffer;
 
-#ifdef GL_GLES
    void      *egl_surface;
-#else
+
+#ifndef GL_GLES
    void  *fbc;
    XID    glx_pixmap;
 #endif
@@ -2010,10 +2010,10 @@ _native_bind_cb(void *data EINA_UNUSED, void *image)
     }
   else if (n->ns.type == EVAS_NATIVE_SURFACE_EVASGL)
     {
-#ifdef GL_GLES
       if (n->egl_surface)
         {
-          void *surface = glsym_evgl_native_surface_egl_image_get(n->egl_surface);
+#ifdef GL_GLES
+          void *surface = glsym_evgl_native_surface_buffer_get(n->egl_surface);
           if (glsym_glEGLImageTargetTexture2DOES)
             {
               glsym_glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, surface);
@@ -2022,10 +2022,11 @@ _native_bind_cb(void *data EINA_UNUSED, void *image)
             }
           else
             ERR("Try glEGLImageTargetTexture2DOES on EGL with no support");
-        }
 #else
-// TODO
+          GLuint tex = (GLuint)(uintptr_t)glsym_evgl_native_surface_buffer_get(n->egl_surface);
+          glBindTexture(GL_TEXTURE_2D, tex);
 #endif
+        }
     }
 }
 
@@ -2063,7 +2064,11 @@ _native_unbind_cb(void *data EINA_UNUSED, void *image)
     }
   else if (n->ns.type == EVAS_NATIVE_SURFACE_EVASGL)
     {
+#ifdef GL_GLES
       // nothing
+#else
+      glBindTexture(GL_TEXTURE_2D, 0);
+#endif
     }
 }
 
@@ -2694,12 +2699,8 @@ eng_image_native_set(void *data, void *image, void *native)
 
               n->pixmap = 0;
               n->visual = 0;
-#ifdef GL_GLES
+
               n->egl_surface = ns->data.evasgl.surface;
-#else
-              n->fbc = 0;
-              n->glx_pixmap = 0;
-#endif
 
               im->native.yinvert     = 0;
               im->native.loose       = 0;