5 files changed, 113 insertions, 3 deletions

diff --git a/src/mesa/state_tracker/st_cb_viewport.c b/src/mesa/state_tracker/st_cb_viewport.c
new file mode 100644
index 00000000000..d10b0b2531e
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_viewport.c
@@ -0,0 +1,73 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include "main/glheader.h"
+#include "st_context.h"
+#include "st_cb_viewport.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "util/u_atomic.h"
+#include "util/u_debug.h"
+
+/**
+ * Cast wrapper to convert a GLframebuffer to an st_framebuffer.
+ * Return NULL if the GLframebuffer is a user-created framebuffer.
+ * We'll only return non-null for window system framebuffers.
+ * Note that this function may fail.
+ */
+static INLINE struct st_framebuffer *
+st_ws_framebuffer(GLframebuffer *fb)
+{
+   /* FBO cannot be casted.  See st_new_framebuffer */
+   return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL);
+}
+
+static void st_viewport(GLcontext * ctx, GLint x, GLint y,
+                        GLsizei width, GLsizei height)
+{
+   struct st_context *st = ctx->st;
+   struct st_framebuffer *stdraw;
+   struct st_framebuffer *stread;
+
+   if (!st->invalidate_on_gl_viewport)
+      return;
+
+   stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
+   stread = st_ws_framebuffer(st->ctx->ReadBuffer);
+
+   if (stdraw)
+      p_atomic_set(&stdraw->revalidate, TRUE);
+   if (stread && stread != stdraw)
+      p_atomic_set(&stread->revalidate, TRUE);
+}
+
+void st_init_viewport_functions(struct dd_function_table *functions)
+{
+   functions->Viewport = st_viewport;
+}
diff --git a/src/mesa/state_tracker/st_cb_viewport.h b/src/mesa/state_tracker/st_cb_viewport.h
new file mode 100644
index 00000000000..db7dd6eab82
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_viewport.h
@@ -0,0 +1,29 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+extern void
+st_init_viewport_functions(struct dd_function_table *functions);
diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index 2070f14a5a6..605a337b553 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -51,6 +51,7 @@
 #include "st_cb_xformfb.h"
 #include "st_cb_flush.h"
 #include "st_cb_strings.h"
+#include "st_cb_viewport.h"
 #include "st_atom.h"
 #include "st_draw.h"
 #include "st_extensions.h"
@@ -278,6 +279,7 @@ void st_init_driver_functions(struct dd_function_table *functions)
    st_init_texture_functions(functions);
    st_init_flush_functions(functions);
    st_init_string_functions(functions);
+   st_init_viewport_functions(functions);
 
    st_init_xformfb_functions(functions);
 
diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index 987516f2482..a578143abc8 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -79,6 +79,12 @@ struct st_context
    struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
    struct draw_stage *rastpos_stage;  /**< For glRasterPos */
 
+
+   /* On old libGL's for linux we need to invalidate the drawables
+    * on glViewpport calls, this is set via a option.
+    */
+   boolean invalidate_on_gl_viewport;
+
    /* Some state is contained in constant objects.
     * Other state is just parameter values.
     */
diff --git a/src/mesa/state_tracker/st_manager.c b/src/mesa/state_tracker/st_manager.c
index 869196941c3..d7523e4941e 100644
--- a/src/mesa/state_tracker/st_manager.c
+++ b/src/mesa/state_tracker/st_manager.c
@@ -621,15 +621,15 @@ st_api_create_context(struct st_api *stapi, struct st_manager *smapi,
       return NULL;
    }
 
-   st->iface.destroy = st_context_destroy;
+   st->invalidate_on_gl_viewport =
+      smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);
 
+   st->iface.destroy = st_context_destroy;
    st->iface.notify_invalid_framebuffer =
       st_context_notify_invalid_framebuffer;
    st->iface.flush = st_context_flush;
-
    st->iface.teximage = st_context_teximage;
    st->iface.copy = NULL;
-
    st->iface.st_context_private = (void *) smapi;
 
    return &st->iface;