st_atom_sampler.c File Reference

Include dependency graph for st_atom_sampler.c:

Go to the source code of this file.

Functions
static GLuint	gl_wrap_to_sp (GLenum wrap)
	Convert GLenum texcoord wrap tokens to pipe tokens.
static GLuint	gl_filter_to_mip_filter (GLenum filter)
static GLuint	gl_filter_to_img_filter (GLenum filter)
static void	update_samplers (struct st_context *st)
Variables
struct st_tracked_state	st_update_sampler

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Function Documentation

static GLuint gl_filter_to_img_filter

(

GLenum

filter

)

[static]

Definition at line 101 of file st_atom_sampler.c.

References assert, PIPE_TEX_FILTER_LINEAR, and PIPE_TEX_FILTER_NEAREST.

{
   switch (filter) {
   case GL_NEAREST:
   case GL_NEAREST_MIPMAP_NEAREST:
   case GL_NEAREST_MIPMAP_LINEAR:
      return PIPE_TEX_FILTER_NEAREST;

   case GL_LINEAR:
   case GL_LINEAR_MIPMAP_NEAREST:
   case GL_LINEAR_MIPMAP_LINEAR:
      return PIPE_TEX_FILTER_LINEAR;

   default:
      assert(0);
      return PIPE_TEX_FILTER_NEAREST;
   }
}

static GLuint gl_filter_to_mip_filter

(

GLenum

filter

)

[static]

Definition at line 78 of file st_atom_sampler.c.

References assert, PIPE_TEX_MIPFILTER_LINEAR, PIPE_TEX_MIPFILTER_NEAREST, and PIPE_TEX_MIPFILTER_NONE.

{
   switch (filter) {
   case GL_NEAREST:
   case GL_LINEAR:
      return PIPE_TEX_MIPFILTER_NONE;

   case GL_NEAREST_MIPMAP_NEAREST:
   case GL_LINEAR_MIPMAP_NEAREST:
      return PIPE_TEX_MIPFILTER_NEAREST;

   case GL_NEAREST_MIPMAP_LINEAR:
   case GL_LINEAR_MIPMAP_LINEAR:
      return PIPE_TEX_MIPFILTER_LINEAR;

   default:
      assert(0);
      return PIPE_TEX_MIPFILTER_NONE;
   }
}

static GLuint gl_wrap_to_sp

(

GLenum

wrap

)

[static]

Convert GLenum texcoord wrap tokens to pipe tokens.

Definition at line 51 of file st_atom_sampler.c.

References assert, PIPE_TEX_WRAP_CLAMP, PIPE_TEX_WRAP_CLAMP_TO_BORDER, PIPE_TEX_WRAP_CLAMP_TO_EDGE, PIPE_TEX_WRAP_MIRROR_CLAMP, PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER, PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE, PIPE_TEX_WRAP_MIRROR_REPEAT, and PIPE_TEX_WRAP_REPEAT.

{
   switch (wrap) {
   case GL_REPEAT:
      return PIPE_TEX_WRAP_REPEAT;
   case GL_CLAMP:
      return PIPE_TEX_WRAP_CLAMP;
   case GL_CLAMP_TO_EDGE:
      return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
   case GL_CLAMP_TO_BORDER:
      return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
   case GL_MIRRORED_REPEAT:
      return PIPE_TEX_WRAP_MIRROR_REPEAT;
   case GL_MIRROR_CLAMP_EXT:
      return PIPE_TEX_WRAP_MIRROR_CLAMP;
   case GL_MIRROR_CLAMP_TO_EDGE_EXT:
      return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE;
   case GL_MIRROR_CLAMP_TO_BORDER_EXT:
      return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER;
   default:
      assert(0);
      return 0;
   }
}

static void update_samplers

(

struct st_context *

st

)

[static]

Definition at line 122 of file st_atom_sampler.c.

References assert, st_fragment_program::Base, pipe_sampler_state::border_color, pipe_sampler_state::compare_func, pipe_sampler_state::compare_mode, st_context::cso_context, cso_single_sampler(), cso_single_sampler_done(), st_context::ctx, st_context::fp, gl_filter_to_img_filter(), gl_filter_to_mip_filter(), gl_wrap_to_sp(), pipe_sampler_state::lod_bias, pipe_sampler_state::mag_img_filter, MAX2, pipe_sampler_state::max_anisotropy, pipe_sampler_state::max_lod, MIN2, pipe_sampler_state::min_img_filter, pipe_sampler_state::min_lod, pipe_sampler_state::min_mip_filter, pipe_sampler_state::normalized_coords, st_context::num_samplers, PIPE_TEX_COMPARE_R_TO_TEXTURE, PIPE_TEX_FILTER_ANISO, st_context::samplers, st_compare_func_to_pipe(), st_get_default_texture(), st_context::state, pipe_sampler_state::wrap_r, pipe_sampler_state::wrap_s, and pipe_sampler_state::wrap_t.

{
   const struct st_fragment_program *fs = st->fp;
   GLuint su;

   st->state.num_samplers = 0;

   /*printf("%s samplers used = 0x%x\n", __FUNCTION__, fs->Base.Base.SamplersUsed);*/

   /* loop over sampler units (aka tex image units) */
   for (su = 0; su < st->ctx->Const.MaxTextureImageUnits; su++) {
      struct pipe_sampler_state *sampler = st->state.samplers + su;

      memset(sampler, 0, sizeof(*sampler));

      if (fs->Base.Base.SamplersUsed & (1 << su)) {
         GLuint texUnit = fs->Base.Base.SamplerUnits[su];
         const struct gl_texture_object *texobj
            = st->ctx->Texture.Unit[texUnit]._Current;

         if (!texobj) {
            texobj = st_get_default_texture(st);
         }

         sampler->wrap_s = gl_wrap_to_sp(texobj->WrapS);
         sampler->wrap_t = gl_wrap_to_sp(texobj->WrapT);
         sampler->wrap_r = gl_wrap_to_sp(texobj->WrapR);

         sampler->min_img_filter = gl_filter_to_img_filter(texobj->MinFilter);
         sampler->min_mip_filter = gl_filter_to_mip_filter(texobj->MinFilter);
         sampler->mag_img_filter = gl_filter_to_img_filter(texobj->MagFilter);

         if (texobj->Target != GL_TEXTURE_RECTANGLE_ARB)
            sampler->normalized_coords = 1;

         sampler->lod_bias = st->ctx->Texture.Unit[su].LodBias;
         sampler->min_lod = MAX2(0.0f, texobj->MinLod);
         sampler->max_lod = MIN2(texobj->MaxLevel - texobj->BaseLevel,
                                 texobj->MaxLod);
         if (sampler->max_lod < sampler->min_lod) {
            /* The GL spec doesn't seem to specify what to do in this case.
             * Swap the values.
             */
            float tmp = sampler->max_lod;
            sampler->max_lod = sampler->min_lod;
            sampler->min_lod = tmp;
            assert(sampler->min_lod <= sampler->max_lod);
         }

         sampler->border_color[0] = texobj->BorderColor[RCOMP];
         sampler->border_color[1] = texobj->BorderColor[GCOMP];
         sampler->border_color[2] = texobj->BorderColor[BCOMP];
         sampler->border_color[3] = texobj->BorderColor[ACOMP];

         sampler->max_anisotropy = texobj->MaxAnisotropy;
         if (sampler->max_anisotropy > 1.0) {
            sampler->min_img_filter = PIPE_TEX_FILTER_ANISO;
            sampler->mag_img_filter = PIPE_TEX_FILTER_ANISO;
         }

         /* only care about ARB_shadow, not SGI shadow */
         if (texobj->CompareMode == GL_COMPARE_R_TO_TEXTURE) {
            sampler->compare_mode = PIPE_TEX_COMPARE_R_TO_TEXTURE;
            sampler->compare_func
               = st_compare_func_to_pipe(texobj->CompareFunc);
         }

         st->state.num_samplers = su + 1;

         /*printf("%s su=%u non-null\n", __FUNCTION__, su);*/
         cso_single_sampler(st->cso_context, su, sampler);
      }
      else {
         /*printf("%s su=%u null\n", __FUNCTION__, su);*/
         cso_single_sampler(st->cso_context, su, NULL);
      }
   }

   cso_single_sampler_done(st->cso_context);
}

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Variable Documentation

struct st_tracked_state st_update_sampler

Initial value:

 {
   "st_update_sampler",                                 
   {                                                    
      _NEW_TEXTURE,                                     
      0,                                                
   },
   update_samplers                                      
}

Definition at line 204 of file st_atom_sampler.c.

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