1 files changed, 97 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_sampler_view.h b/src/gallium/drivers/svga/svga_sampler_view.h
new file mode 100644
index 0000000000..e64665f2e5
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_sampler_view.h
@@ -0,0 +1,97 @@
+/**********************************************************
+ * Copyright 2008-2009 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, sublicense, 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 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
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * 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.
+ *
+ **********************************************************/
+
+#ifndef SVGA_SAMPLER_VIEW_H
+#define SVGA_SAMPLER_VIEW_H
+
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_state.h"
+#include "util/u_inlines.h"
+#include "svga_screen_cache.h"
+
+struct pipe_context;
+struct pipe_screen;
+struct svga_context;
+struct svga_winsys_surface;
+enum SVGA3dSurfaceFormat;
+
+
+/**
+ * A sampler's view into a texture
+ *
+ * We currently cache one sampler view on
+ * the texture and in there by holding a reference
+ * from the texture to the sampler view.
+ *
+ * Because of this we can not hold a refernce to the
+ * texture from the sampler view. So the user
+ * of the sampler views must make sure that the
+ * texture has a reference take for as long as
+ * the sampler view is refrenced.
+ *
+ * Just unreferencing the sampler_view before the
+ * texture is enough.
+ */
+struct svga_sampler_view
+{
+   struct pipe_reference reference;
+
+   struct pipe_resource *texture;
+
+   int min_lod;
+   int max_lod;
+
+   unsigned age;
+
+   struct svga_host_surface_cache_key key;
+   struct svga_winsys_surface *handle;
+};
+
+
+
+extern struct svga_sampler_view *
+svga_get_tex_sampler_view(struct pipe_context *pipe,
+                          struct pipe_resource *pt,
+                          unsigned min_lod, unsigned max_lod);
+
+void
+svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v);
+
+void
+svga_destroy_sampler_view_priv(struct svga_sampler_view *v);
+
+static INLINE void
+svga_sampler_view_reference(struct svga_sampler_view **ptr, struct svga_sampler_view *v)
+{
+   struct svga_sampler_view *old = *ptr;
+
+   if (pipe_reference(&(*ptr)->reference, &v->reference))
+      svga_destroy_sampler_view_priv(old);
+   *ptr = v;
+}
+
+
+#endif