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      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 if (ctx->Texture.Unit[unit]._Current)
     37       return &ctx->Texture.Unit[unit]._Current->Sampler;
     38    else
     39       return NULL;
     40 }
     41 
     42 
     43 /** Does the given filter state do mipmap filtering? */
     44 static inline GLboolean
     45 _mesa_is_mipmap_filter(const struct gl_sampler_object *samp)
     46 {
     47    return samp->MinFilter != GL_NEAREST && samp->MinFilter != GL_LINEAR;
     48 }
     49 
     50 
     51 extern void
     52 _mesa_reference_sampler_object_(struct gl_context *ctx,
     53                                 struct gl_sampler_object **ptr,
     54                                 struct gl_sampler_object *samp);
     55 
     56 static inline void
     57 _mesa_reference_sampler_object(struct gl_context *ctx,
     58                                struct gl_sampler_object **ptr,
     59                                struct gl_sampler_object *samp)
     60 {
     61    if (*ptr != samp)
     62       _mesa_reference_sampler_object_(ctx, ptr, samp);
     63 }
     64 
     65 
     66 extern void
     67 _mesa_init_sampler_object(struct gl_sampler_object *sampObj, GLuint name);
     68 
     69 extern struct gl_sampler_object *
     70 _mesa_new_sampler_object(struct gl_context *ctx, GLuint name);
     71 
     72 extern void
     73 _mesa_delete_sampler_object(struct gl_context *ctx,
     74                             struct gl_sampler_object *sampObj);
     75 
     76 extern void
     77 _mesa_init_sampler_object_functions(struct dd_function_table *driver);
     78 
     79 extern void
     80 _mesa_init_sampler_object_dispatch(struct _glapi_table *disp);
     81 
     82 extern void GLAPIENTRY
     83 _mesa_BindSampler(GLuint unit, GLuint sampler);
     84 
     85 extern void GLAPIENTRY
     86 _mesa_GenSamplers(GLsizei count, GLuint *samplers);
     87 
     88 extern void GLAPIENTRY
     89 _mesa_DeleteSamplers(GLsizei count, const GLuint *samplers);
     90 
     91 extern void GLAPIENTRY
     92 _mesa_SamplerParameteri(GLuint sampler, GLenum pname, GLint param);
     93 
     94 #endif /* SAMPLEROBJ_H */
     95