src/mesa/state_tracker/st_atom_sampler.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * 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
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34
  35 #include "st_context.h"
  36 #include "st_atom.h"
  37 #include "pipe/p_context.h"
  38 #include "pipe/p_defines.h"
  39
  40
  41 /**
  42  * Convert GLenum texcoord wrap tokens to pipe tokens.
  43  */
  44 static GLuint
  45 gl_wrap_to_sp(GLenum wrap)
  46 {
  47    switch (wrap) {
  48    case GL_REPEAT:
  49       return PIPE_TEX_WRAP_REPEAT;
  50    case GL_CLAMP:
  51       return PIPE_TEX_WRAP_CLAMP;
  52    case GL_CLAMP_TO_EDGE:
  53       return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
  54    case GL_CLAMP_TO_BORDER:
  55       return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
  56    case GL_MIRRORED_REPEAT:
  57       return PIPE_TEX_WRAP_MIRROR_REPEAT;
  58    case GL_MIRROR_CLAMP_EXT:
  59       return PIPE_TEX_WRAP_MIRROR_CLAMP;
  60    case GL_MIRROR_CLAMP_TO_EDGE_EXT:
  61       return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE;
  62    case GL_MIRROR_CLAMP_TO_BORDER_EXT:
  63       return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER;
  64    default:
  65       abort();
  66       return 0;
  67    }
  68 }
  69
  70
  71 static GLuint
  72 gl_filter_to_sp(GLenum filter)
  73 {
  74    switch (filter) {
  75    case GL_NEAREST:
  76       return PIPE_TEX_FILTER_NEAREST;
  77    case GL_LINEAR:
  78       return PIPE_TEX_FILTER_LINEAR;
  79    case GL_NEAREST_MIPMAP_NEAREST:
  80       return PIPE_TEX_FILTER_NEAREST_MIPMAP_NEAREST;
  81    case GL_NEAREST_MIPMAP_LINEAR:
  82       return PIPE_TEX_FILTER_NEAREST_MIPMAP_LINEAR;
  83    case GL_LINEAR_MIPMAP_NEAREST:
  84       return PIPE_TEX_FILTER_LINEAR_MIPMAP_NEAREST;
  85    case GL_LINEAR_MIPMAP_LINEAR:
  86       return PIPE_TEX_FILTER_LINEAR_MIPMAP_LINEAR;
  87    default:
  88       abort();
  89       return 0;
  90    }
  91 }
  92
  93
  94 static void
  95 update_samplers(struct st_context *st)
  96 {
  97    GLuint u;
  98
  99    for (u = 0; u < st->ctx->Const.MaxTextureImageUnits; u++) {
 100       const struct gl_texture_object *texobj
 101          = st->ctx->Texture.Unit[u]._Current;
 102       struct pipe_sampler_state sampler;
 103
 104       memset(&sampler, 0, sizeof(sampler));
 105
 106       sampler.wrap_s = gl_wrap_to_sp(texobj->WrapS);
 107       sampler.wrap_t = gl_wrap_to_sp(texobj->WrapT);
 108       sampler.wrap_r = gl_wrap_to_sp(texobj->WrapR);
 109
 110       sampler.min_filter = gl_filter_to_sp(texobj->MinFilter);
 111       sampler.mag_filter = gl_filter_to_sp(texobj->MagFilter);
 112
 113       /* XXX more sampler state here */
 114
 115       if (memcmp(&sampler, &st->state.sampler[u], sizeof(sampler)) != 0) {
 116          /* state has changed */
 117          st->state.sampler[u] = sampler;
 118          st->pipe->set_sampler_state(st->pipe, u, &sampler);
 119       }
 120    }
 121 }
 122
 123
 124 const struct st_tracked_state st_update_sampler = {
 125    .dirty = {
 126       .mesa = _NEW_TEXTURE,
 127       .st  = 0,
 128    },
 129    .update = update_samplers
 130 };
 131
 132
 133
 134
 135