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