src/mesa/main/samplerobj.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2011  VMware, Inc.  All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  20  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24
  25
  26 #ifndef SAMPLEROBJ_H
  27 #define SAMPLEROBJ_H
  28
  29 struct dd_function_table;
  30
  31 static inline struct gl_sampler_object *
  32 _mesa_get_samplerobj(struct gl_context *ctx, GLuint unit)
  33 {
  34    if (ctx->Texture.Unit[unit].Sampler)
  35       return ctx->Texture.Unit[unit].Sampler;
  36    else
  37       return &ctx->Texture.Unit[unit]._Current->Sampler;
  38 }
  39
  40
  41 /** Does the given filter state do mipmap filtering? */
  42 static inline GLboolean
  43 _mesa_is_mipmap_filter(const struct gl_sampler_object *samp)
  44 {
  45    return samp->MinFilter != GL_NEAREST && samp->MinFilter != GL_LINEAR;
  46 }
  47
  48
  49 extern void
  50 _mesa_reference_sampler_object_(struct gl_context *ctx,
  51                                 struct gl_sampler_object **ptr,
  52                                 struct gl_sampler_object *samp);
  53
  54 static inline void
  55 _mesa_reference_sampler_object(struct gl_context *ctx,
  56                                struct gl_sampler_object **ptr,
  57                                struct gl_sampler_object *samp)
  58 {
  59    if (*ptr != samp)
  60       _mesa_reference_sampler_object_(ctx, ptr, samp);
  61 }
  62
  63
  64 extern void
  65 _mesa_init_sampler_object(struct gl_sampler_object *sampObj, GLuint name);
  66
  67 extern struct gl_sampler_object *
  68 _mesa_new_sampler_object(struct gl_context *ctx, GLuint name);
  69
  70 extern void
  71 _mesa_delete_sampler_object(struct gl_context *ctx,
  72                             struct gl_sampler_object *sampObj);
  73
  74 extern void
  75 _mesa_init_sampler_object_functions(struct dd_function_table *driver);
  76
  77 extern void
  78 _mesa_init_sampler_object_dispatch(struct _glapi_table *disp);
  79
  80
  81 #endif /* SAMPLEROBJ_H */