src/gallium/drivers/svga/svga_sampler_view.h

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  25
  26 #ifndef SVGA_SAMPLER_VIEW_H
  27 #define SVGA_SAMPLER_VIEW_H
  28
  29
  30 #include "pipe/p_compiler.h"
  31 #include "pipe/p_state.h"
  32 #include "util/u_inlines.h"
  33 #include "svga_screen_cache.h"
  34
  35 struct pipe_context;
  36 struct pipe_screen;
  37 struct svga_context;
  38 struct svga_winsys_surface;
  39 struct svga_surface;
  40 enum SVGA3dSurfaceFormat;
  41
  42
  43 /**
  44  * A sampler's view into a texture
  45  *
  46  * We currently cache one sampler view on
  47  * the texture and in there by holding a reference
  48  * from the texture to the sampler view.
  49  *
  50  * Because of this we can not hold a refernce to the
  51  * texture from the sampler view. So the user
  52  * of the sampler views must make sure that the
  53  * texture has a reference take for as long as
  54  * the sampler view is refrenced.
  55  *
  56  * Just unreferencing the sampler_view before the
  57  * texture is enough.
  58  */
  59 struct svga_sampler_view
  60 {
  61    struct pipe_reference reference;
  62
  63    struct pipe_resource *texture;
  64
  65    int min_lod;
  66    int max_lod;
  67
  68    unsigned age;
  69
  70    struct svga_host_surface_cache_key key;
  71    struct svga_winsys_surface *handle;
  72 };
  73
  74
  75
  76 extern struct svga_sampler_view *
  77 svga_get_tex_sampler_view(struct pipe_context *pipe,
  78                           struct pipe_resource *pt,
  79                           unsigned min_lod, unsigned max_lod);
  80
  81 void
  82 svga_validate_sampler_view(struct svga_context *svga, struct svga_sampler_view *v);
  83
  84 void
  85 svga_destroy_sampler_view_priv(struct svga_sampler_view *v);
  86
  87 void
  88 svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv);
  89
  90 static inline void
  91 svga_sampler_view_reference(struct svga_sampler_view **ptr, struct svga_sampler_view *v)
  92 {
  93    struct svga_sampler_view *old = *ptr;
  94
  95    if (pipe_reference_described(&(*ptr)->reference, &v->reference,
  96                                 (debug_reference_descriptor)svga_debug_describe_sampler_view))
  97       svga_destroy_sampler_view_priv(old);
  98    *ptr = v;
  99 }
 100
 101 boolean
 102 svga_check_sampler_view_resource_collision(struct svga_context *svga,
 103                                            struct svga_winsys_surface *res,
 104                                            unsigned shader);
 105 #endif