Mesa (master): st/egl: Implement get_egl_image hook.

[Chia-I Wu]

Module: Mesa
Branch: master
Commit: 776dc53f62c46e235ff8ef2e1eec1a308a036987
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=776dc53f62c46e235ff8ef2e1eec1a308a036987

Author: Chia-I Wu <olv at lunarg.com>
Date:   Fri Mar 12 09:56:11 2010 +0800

st/egl: Implement get_egl_image hook.

This hook may be used by rendering state trackers to implement EGLImage
extensions.

---

 src/gallium/state_trackers/egl/common/egl_g3d_st.c |   32 ++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/src/gallium/state_trackers/egl/common/egl_g3d_st.c b/src/gallium/state_trackers/egl/common/egl_g3d_st.c
index 6488965..9573ba0 100644
--- a/src/gallium/state_trackers/egl/common/egl_g3d_st.c
+++ b/src/gallium/state_trackers/egl/common/egl_g3d_st.c
@@ -85,6 +85,37 @@ egl_g3d_create_st_api(enum st_api_type api)
    return mod->create_api();
 }
 
+static boolean
+egl_g3d_st_manager_get_egl_image(struct st_manager *smapi,
+                                 struct st_egl_image *stimg)
+{
+   struct egl_g3d_st_manager *gsmapi = egl_g3d_st_manager(smapi);
+   EGLImageKHR handle = (EGLImageKHR) stimg->egl_image;
+   _EGLImage *img;
+   struct egl_g3d_image *gimg;
+
+   /* this is called from state trackers */
+   _eglLockMutex(&gsmapi->display->Mutex);
+
+   img = _eglLookupImage(handle, gsmapi->display);
+   if (!img) {
+      _eglUnlockMutex(&gsmapi->display->Mutex);
+      return FALSE;
+   }
+
+   gimg = egl_g3d_image(img);
+
+   stimg->texture = NULL;
+   pipe_texture_reference(&stimg->texture, gimg->texture);
+   stimg->face = gimg->face;
+   stimg->level = gimg->level;
+   stimg->zslice = gimg->zslice;
+
+   _eglUnlockMutex(&gsmapi->display->Mutex);
+
+   return TRUE;
+}
+
 struct st_manager *
 egl_g3d_create_st_manager(_EGLDisplay *dpy)
 {
@@ -96,6 +127,7 @@ egl_g3d_create_st_manager(_EGLDisplay *dpy)
       gsmapi->display = dpy;
 
       gsmapi->base.screen = gdpy->native->screen;
+      gsmapi->base.get_egl_image = egl_g3d_st_manager_get_egl_image;
    }
 
    return &gsmapi->base;;