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_cache.h"
  37 #include "st_atom.h"
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_defines.h"
  40
  41
  42 /**
  43  * Convert GLenum texcoord wrap tokens to pipe tokens.
  44  */
  45 static GLuint
  46 gl_wrap_to_sp(GLenum wrap)
  47 {
  48    switch (wrap) {
  49    case GL_REPEAT:
  50       return PIPE_TEX_WRAP_REPEAT;
  51    case GL_CLAMP:
  52       return PIPE_TEX_WRAP_CLAMP;
  53    case GL_CLAMP_TO_EDGE:
  54       return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
  55    case GL_CLAMP_TO_BORDER:
  56       return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
  57    case GL_MIRRORED_REPEAT:
  58       return PIPE_TEX_WRAP_MIRROR_REPEAT;
  59    case GL_MIRROR_CLAMP_EXT:
  60       return PIPE_TEX_WRAP_MIRROR_CLAMP;
  61    case GL_MIRROR_CLAMP_TO_EDGE_EXT:
  62       return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE;
  63    case GL_MIRROR_CLAMP_TO_BORDER_EXT:
  64       return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER;
  65    default:
  66       abort();
  67       return 0;
  68    }
  69 }
  70
  71
  72 static GLuint
  73 gl_filter_to_mip_filter(GLenum filter)
  74 {
  75    switch (filter) {
  76    case GL_NEAREST:
  77    case GL_LINEAR:
  78       return PIPE_TEX_MIPFILTER_NONE;
  79
  80    case GL_NEAREST_MIPMAP_NEAREST:
  81    case GL_LINEAR_MIPMAP_NEAREST:
  82       return PIPE_TEX_MIPFILTER_NEAREST;
  83
  84    case GL_NEAREST_MIPMAP_LINEAR:
  85    case GL_LINEAR_MIPMAP_LINEAR:
  86       return PIPE_TEX_MIPFILTER_LINEAR;
  87
  88    default:
  89       assert(0);
  90       return PIPE_TEX_MIPFILTER_NONE;
  91    }
  92 }
  93
  94
  95 static GLuint
  96 gl_filter_to_img_filter(GLenum filter)
  97 {
  98    switch (filter) {
  99    case GL_NEAREST:
 100    case GL_NEAREST_MIPMAP_NEAREST:
 101    case GL_NEAREST_MIPMAP_LINEAR:
 102       return PIPE_TEX_FILTER_NEAREST;
 103
 104    case GL_LINEAR:
 105    case GL_LINEAR_MIPMAP_NEAREST:
 106    case GL_LINEAR_MIPMAP_LINEAR:
 107       return PIPE_TEX_FILTER_LINEAR;
 108
 109    default:
 110       assert(0);
 111       return PIPE_TEX_FILTER_NEAREST;
 112    }
 113 }
 114
 115
 116 static void
 117 update_samplers(struct st_context *st)
 118 {
 119    GLuint u;
 120
 121    for (u = 0; u < st->ctx->Const.MaxTextureImageUnits; u++) {
 122       const struct gl_texture_object *texobj
 123          = st->ctx->Texture.Unit[u]._Current;
 124       struct pipe_sampler_state sampler;
 125       const struct cso_sampler *cso;
 126
 127       memset(&sampler, 0, sizeof(sampler));
 128
 129       if (texobj) {
 130          sampler.wrap_s = gl_wrap_to_sp(texobj->WrapS);
 131          sampler.wrap_t = gl_wrap_to_sp(texobj->WrapT);
 132          sampler.wrap_r = gl_wrap_to_sp(texobj->WrapR);
 133
 134          sampler.min_img_filter = gl_filter_to_img_filter(texobj->MinFilter);
 135          sampler.min_mip_filter = gl_filter_to_mip_filter(texobj->MinFilter);
 136          sampler.mag_img_filter = gl_filter_to_img_filter(texobj->MagFilter);
 137
 138          if (texobj->Target != GL_TEXTURE_RECTANGLE_ARB)
 139             sampler.normalized_coords = 1;
 140
 141          sampler.lod_bias = st->ctx->Texture.Unit[u].LodBias;
 142 #if 1
 143          sampler.min_lod = texobj->MinLod;
 144          sampler.max_lod = texobj->MaxLod;
 145 #else
 146          /* min/max lod should really be as follows (untested).
 147           * Also, calculate_first_last_level() needs to be overhauled
 148           * since today's hardware had real support for LOD clamping.
 149           */
 150          sampler.min_lod = MAX2(texobj->BaseLevel, texobj->MinLod);
 151          sampler.max_lod = MIN2(texobj->MaxLevel, texobj->MaxLod);
 152 #endif
 153
 154          sampler.max_anisotropy = texobj->MaxAnisotropy;
 155
 156          /* only care about ARB_shadow, not SGI shadow */
 157          if (texobj->CompareMode == GL_COMPARE_R_TO_TEXTURE) {
 158             sampler.compare = 1;
 159             sampler.compare_mode = PIPE_TEX_COMPARE_R_TO_TEXTURE;
 160             sampler.compare_func
 161                = st_compare_func_to_pipe(texobj->CompareFunc);
 162          }
 163
 164          /* XXX more sampler state here */
 165       }
 166
 167       cso = st_cached_sampler_state(st, &sampler);
 168
 169       if (cso != st->state.sampler[u]) {
 170          /* state has changed */
 171          st->state.sampler[u] = cso;
 172          st->pipe->bind_sampler_state(st->pipe, u, cso->data);
 173       }
 174    }
 175
 176
 177    /* mapping from sampler vars to texture units */
 178    {
 179       struct gl_fragment_program *fprog = st->ctx->FragmentProgram._Current;
 180       uint sample_units[PIPE_MAX_SAMPLERS];
 181       uint s;
 182       for (s = 0; s < PIPE_MAX_SAMPLERS; s++) {
 183          sample_units[s] = fprog->Base.SamplerUnits[s];
 184       }
 185
 186       st->pipe->set_sampler_units(st->pipe, PIPE_MAX_SAMPLERS, sample_units);
 187    }
 188 }
 189
 190
 191 const struct st_tracked_state st_update_sampler = {
 192    .name = "st_update_sampler",
 193    .dirty = {
 194       .mesa = _NEW_TEXTURE | _NEW_PROGRAM,
 195       .st  = 0,
 196    },
 197    .update = update_samplers
 198 };
 199
 200
 201
 202
 203