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 "st_program.h"
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_defines.h"
  40 #include "pipe/p_util.h"
  41 #include "cso_cache/cso_context.h"
  42
  43
  44 /**
  45  * Convert GLenum texcoord wrap tokens to pipe tokens.
  46  */
  47 static GLuint
  48 gl_wrap_to_sp(GLenum wrap)
  49 {
  50    switch (wrap) {
  51    case GL_REPEAT:
  52       return PIPE_TEX_WRAP_REPEAT;
  53    case GL_CLAMP:
  54       return PIPE_TEX_WRAP_CLAMP;
  55    case GL_CLAMP_TO_EDGE:
  56       return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
  57    case GL_CLAMP_TO_BORDER:
  58       return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
  59    case GL_MIRRORED_REPEAT:
  60       return PIPE_TEX_WRAP_MIRROR_REPEAT;
  61    case GL_MIRROR_CLAMP_EXT:
  62       return PIPE_TEX_WRAP_MIRROR_CLAMP;
  63    case GL_MIRROR_CLAMP_TO_EDGE_EXT:
  64       return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE;
  65    case GL_MIRROR_CLAMP_TO_BORDER_EXT:
  66       return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER;
  67    default:
  68       abort();
  69       return 0;
  70    }
  71 }
  72
  73
  74 static GLuint
  75 gl_filter_to_mip_filter(GLenum filter)
  76 {
  77    switch (filter) {
  78    case GL_NEAREST:
  79    case GL_LINEAR:
  80       return PIPE_TEX_MIPFILTER_NONE;
  81
  82    case GL_NEAREST_MIPMAP_NEAREST:
  83    case GL_LINEAR_MIPMAP_NEAREST:
  84       return PIPE_TEX_MIPFILTER_NEAREST;
  85
  86    case GL_NEAREST_MIPMAP_LINEAR:
  87    case GL_LINEAR_MIPMAP_LINEAR:
  88       return PIPE_TEX_MIPFILTER_LINEAR;
  89
  90    default:
  91       assert(0);
  92       return PIPE_TEX_MIPFILTER_NONE;
  93    }
  94 }
  95
  96
  97 static GLuint
  98 gl_filter_to_img_filter(GLenum filter)
  99 {
 100    switch (filter) {
 101    case GL_NEAREST:
 102    case GL_NEAREST_MIPMAP_NEAREST:
 103    case GL_NEAREST_MIPMAP_LINEAR:
 104       return PIPE_TEX_FILTER_NEAREST;
 105
 106    case GL_LINEAR:
 107    case GL_LINEAR_MIPMAP_NEAREST:
 108    case GL_LINEAR_MIPMAP_LINEAR:
 109       return PIPE_TEX_FILTER_LINEAR;
 110
 111    default:
 112       assert(0);
 113       return PIPE_TEX_FILTER_NEAREST;
 114    }
 115 }
 116
 117
 118 static void
 119 update_samplers(struct st_context *st)
 120 {
 121    const struct st_fragment_program *fs = st->fp;
 122    GLuint su;
 123
 124    st->state.num_samplers = 0;
 125
 126    /* loop over sampler units (aka tex image units) */
 127    for (su = 0; su < st->ctx->Const.MaxTextureImageUnits; su++) {
 128       struct pipe_sampler_state *sampler = st->state.samplers + su;
 129
 130       memset(sampler, 0, sizeof(*sampler));
 131
 132       if (fs->Base.Base.SamplersUsed & (1 << su)) {
 133          GLuint texUnit = fs->Base.Base.SamplerUnits[su];
 134          const struct gl_texture_object *texobj
 135             = st->ctx->Texture.Unit[texUnit]._Current;
 136
 137          assert(texobj);
 138
 139          sampler->wrap_s = gl_wrap_to_sp(texobj->WrapS);
 140          sampler->wrap_t = gl_wrap_to_sp(texobj->WrapT);
 141          sampler->wrap_r = gl_wrap_to_sp(texobj->WrapR);
 142
 143          sampler->min_img_filter = gl_filter_to_img_filter(texobj->MinFilter);
 144          sampler->min_mip_filter = gl_filter_to_mip_filter(texobj->MinFilter);
 145          sampler->mag_img_filter = gl_filter_to_img_filter(texobj->MagFilter);
 146
 147          if (texobj->Target != GL_TEXTURE_RECTANGLE_ARB)
 148             sampler->normalized_coords = 1;
 149
 150          sampler->lod_bias = st->ctx->Texture.Unit[su].LodBias;
 151          sampler->min_lod = MAX2(texobj->BaseLevel, texobj->MinLod);
 152          sampler->max_lod = MIN2(texobj->MaxLevel, texobj->MaxLod);
 153
 154          sampler->border_color[0] = texobj->BorderColor[RCOMP];
 155          sampler->border_color[1] = texobj->BorderColor[GCOMP];
 156          sampler->border_color[2] = texobj->BorderColor[BCOMP];
 157          sampler->border_color[3] = texobj->BorderColor[ACOMP];
 158
 159          sampler->max_anisotropy = texobj->MaxAnisotropy;
 160          if (sampler->max_anisotropy > 1.0) {
 161             sampler->min_img_filter = PIPE_TEX_FILTER_ANISO;
 162             sampler->mag_img_filter = PIPE_TEX_FILTER_ANISO;
 163          }
 164
 165          /* only care about ARB_shadow, not SGI shadow */
 166          if (texobj->CompareMode == GL_COMPARE_R_TO_TEXTURE) {
 167             sampler->compare_mode = PIPE_TEX_COMPARE_R_TO_TEXTURE;
 168             sampler->compare_func
 169                = st_compare_func_to_pipe(texobj->CompareFunc);
 170          }
 171
 172          st->state.num_samplers = su + 1;
 173
 174          /* XXX more sampler state here */
 175
 176          cso_single_sampler(st->cso_context, su, sampler);
 177       }
 178       else {
 179          cso_single_sampler(st->cso_context, su, NULL);
 180       }
 181    }
 182
 183    cso_single_sampler_done(st->cso_context);
 184 }
 185
 186
 187 const struct st_tracked_state st_update_sampler = {
 188    "st_update_sampler",                                 /* name */
 189    {                                                    /* dirty */
 190       _NEW_TEXTURE,                                     /* mesa */
 191       0,                                                /* st */
 192    },
 193    update_samplers                                      /* update */
 194 };