Subversion Repositories Kolibri OS

/**********************************************************

 * 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);

void

svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv);

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_described(&(*ptr)->reference, &v->reference,

                                (debug_reference_descriptor)svga_debug_describe_sampler_view))

      svga_destroy_sampler_view_priv(old);

   *ptr = v;

}

#endif