gallium: Fix invalidate framebuffer with old libGL libraries

5 files changed, 21 insertions, 3 deletions

diff --git a/src/gallium/include/state_tracker/st_api.h b/src/gallium/include/state_tracker/st_api.h
index 1e343d0e36..e7efbf065f 100644
--- a/src/gallium/include/state_tracker/st_api.h
+++ b/src/gallium/include/state_tracker/st_api.h
@@ -109,7 +109,14 @@ enum st_context_resource_type {
  * Value to st_manager->get_param function.
  */
 enum st_manager_param {
-   ST_MANAGER_TEMP,
+   /**
+    * The dri state tracker on old libGL's doesn't do the right thing
+    * with regards to invalidating the framebuffers.
+    *
+    * For the mesa state tracker that means that it needs to invalidate
+    * the framebuffer in glViewport itself.
+    */
+   ST_MANAGER_BROKEN_INVALIDATE
 };
 
 /**
diff --git a/src/gallium/state_trackers/dri/common/dri_drawable.c b/src/gallium/state_trackers/dri/common/dri_drawable.c
index 25892fc7a7..2bc0faffef 100644
--- a/src/gallium/state_trackers/dri/common/dri_drawable.c
+++ b/src/gallium/state_trackers/dri/common/dri_drawable.c
@@ -67,7 +67,7 @@ dri_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
     */
    new_stamp = (drawable->texture_stamp != drawable->dPriv->lastStamp);
 
-   if (new_stamp || new_mask) {
+   if (new_stamp || new_mask || screen->broken_invalidate) {
       if (new_stamp && screen->update_drawable_info)
          screen->update_drawable_info(drawable);
 
diff --git a/src/gallium/state_trackers/dri/common/dri_screen.c b/src/gallium/state_trackers/dri/common/dri_screen.c
index f5c936e182..5decdb23b1 100644
--- a/src/gallium/state_trackers/dri/common/dri_screen.c
+++ b/src/gallium/state_trackers/dri/common/dri_screen.c
@@ -341,7 +341,14 @@ static int
 dri_get_param(struct st_manager *smapi,
               enum st_manager_param param)
 {
-   return 0;
+   struct dri_screen *screen = (struct dri_screen *)smapi;
+
+   switch(param) {
+   case ST_MANAGER_BROKEN_INVALIDATE:
+      return screen->broken_invalidate;
+   default:
+      return 0;
+   }
 }
 
 static void
diff --git a/src/gallium/state_trackers/dri/common/dri_screen.h b/src/gallium/state_trackers/dri/common/dri_screen.h
index 1740fa8f42..9ff925d4be 100644
--- a/src/gallium/state_trackers/dri/common/dri_screen.h
+++ b/src/gallium/state_trackers/dri/common/dri_screen.h
@@ -50,6 +50,9 @@ struct dri_screen
    struct st_manager base;
    struct st_api *st_api;
 
+   /* on old libGL's invalidate doesn't get called as it should */
+   boolean broken_invalidate;
+
    /* dri */
    __DRIscreen *sPriv;
 
diff --git a/src/gallium/state_trackers/dri/drm/dri2.c b/src/gallium/state_trackers/dri/drm/dri2.c
index e1216f14c0..6c022f4bbf 100644
--- a/src/gallium/state_trackers/dri/drm/dri2.c
+++ b/src/gallium/state_trackers/dri/drm/dri2.c
@@ -526,6 +526,7 @@ dri2_init_screen(__DRIscreen * sPriv)
       goto fail;
 
    screen->auto_fake_front = dri_with_format(sPriv);
+   screen->broken_invalidate = !sPriv->dri2.useInvalidate;
 
    return configs;
 fail: