src/gallium/drivers/svga/svga_pipe_sampler.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * 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
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "pipe/p_inlines.h"
  27 #include "pipe/p_defines.h"
  28 #include "util/u_math.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_pack_color.h"
  31 #include "tgsi/tgsi_parse.h"
  32
  33 #include "svga_context.h"
  34 #include "svga_screen_texture.h"
  35
  36 #include "svga_debug.h"
  37
  38 static INLINE unsigned
  39 translate_wrap_mode(unsigned wrap)
  40 {
  41    switch (wrap) {
  42    case PIPE_TEX_WRAP_REPEAT:
  43       return SVGA3D_TEX_ADDRESS_WRAP;
  44
  45    case PIPE_TEX_WRAP_CLAMP:
  46       return SVGA3D_TEX_ADDRESS_CLAMP;
  47
  48    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  49       /* Unfortunately SVGA3D_TEX_ADDRESS_EDGE not respected by
  50        * hardware.
  51        */
  52       return SVGA3D_TEX_ADDRESS_CLAMP;
  53
  54    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  55       return SVGA3D_TEX_ADDRESS_BORDER;
  56
  57    case PIPE_TEX_WRAP_MIRROR_REPEAT:
  58       return SVGA3D_TEX_ADDRESS_MIRROR;
  59
  60    case PIPE_TEX_WRAP_MIRROR_CLAMP:
  61    case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  62    case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  63       return SVGA3D_TEX_ADDRESS_MIRRORONCE;
  64
  65    default:
  66       assert(0);
  67       return SVGA3D_TEX_ADDRESS_WRAP;
  68    }
  69 }
  70
  71 static INLINE unsigned translate_img_filter( unsigned filter )
  72 {
  73    switch (filter) {
  74    case PIPE_TEX_FILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
  75    case PIPE_TEX_FILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
  76    default:
  77       assert(0);
  78       return SVGA3D_TEX_FILTER_NEAREST;
  79    }
  80 }
  81
  82 static INLINE unsigned translate_mip_filter( unsigned filter )
  83 {
  84    switch (filter) {
  85    case PIPE_TEX_MIPFILTER_NONE:    return SVGA3D_TEX_FILTER_NONE;
  86    case PIPE_TEX_MIPFILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
  87    case PIPE_TEX_MIPFILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
  88    default:
  89       assert(0);
  90       return SVGA3D_TEX_FILTER_NONE;
  91    }
  92 }
  93
  94 static void *
  95 svga_create_sampler_state(struct pipe_context *pipe,
  96                           const struct pipe_sampler_state *sampler)
  97 {
  98    struct svga_context *svga = svga_context(pipe);
  99    struct svga_sampler_state *cso = CALLOC_STRUCT( svga_sampler_state );
 100    union util_color uc;
 101
 102    cso->mipfilter = translate_mip_filter(sampler->min_mip_filter);
 103    cso->magfilter = translate_img_filter( sampler->mag_img_filter );
 104    cso->minfilter = translate_img_filter( sampler->min_img_filter );
 105    cso->aniso_level = MAX2( (unsigned) sampler->max_anisotropy, 1 );
 106    if(cso->aniso_level != 1)
 107       cso->magfilter = cso->minfilter = SVGA3D_TEX_FILTER_ANISOTROPIC;
 108    cso->lod_bias = sampler->lod_bias;
 109    cso->addressu = translate_wrap_mode(sampler->wrap_s);
 110    cso->addressv = translate_wrap_mode(sampler->wrap_t);
 111    cso->addressw = translate_wrap_mode(sampler->wrap_r);
 112    cso->normalized_coords = sampler->normalized_coords;
 113    cso->compare_mode = sampler->compare_mode;
 114    cso->compare_func = sampler->compare_func;
 115
 116    {
 117       ubyte r = float_to_ubyte(sampler->border_color[0]);
 118       ubyte g = float_to_ubyte(sampler->border_color[1]);
 119       ubyte b = float_to_ubyte(sampler->border_color[2]);
 120       ubyte a = float_to_ubyte(sampler->border_color[3]);
 121
 122       util_pack_color_ub( r, g, b, a,
 123                           PIPE_FORMAT_B8G8R8A8_UNORM, &uc);
 124       cso->bordercolor = uc.ui;
 125    }
 126
 127    /* No SVGA3D support for:
 128     *    - min/max LOD clamping
 129     */
 130    cso->min_lod = 0;
 131    cso->view_min_lod = MAX2(sampler->min_lod, 0);
 132    cso->view_max_lod = MAX2(sampler->max_lod, 0);
 133
 134    /* Use min_mipmap */
 135    if (svga->debug.use_min_mipmap) {
 136       if (cso->view_min_lod == cso->view_max_lod) {
 137          cso->min_lod = cso->view_min_lod;
 138          cso->view_min_lod = 0;
 139          cso->view_max_lod = 1000; /* Just a high number */
 140          cso->mipfilter = SVGA3D_TEX_FILTER_NONE;
 141       }
 142    }
 143
 144    SVGA_DBG(DEBUG_VIEWS, "min %u, view(min %u, max %u) lod, mipfilter %s\n",
 145             cso->min_lod, cso->view_min_lod, cso->view_max_lod,
 146             cso->mipfilter == SVGA3D_TEX_FILTER_NONE ? "SVGA3D_TEX_FILTER_NONE" : "SOMETHING");
 147
 148    return cso;
 149 }
 150
 151 static void svga_bind_sampler_states(struct pipe_context *pipe,
 152                                      unsigned num, void **sampler)
 153 {
 154    struct svga_context *svga = svga_context(pipe);
 155    unsigned i;
 156
 157    assert(num <= PIPE_MAX_SAMPLERS);
 158
 159    /* Check for no-op */
 160    if (num == svga->curr.num_samplers &&
 161        !memcmp(svga->curr.sampler, sampler, num * sizeof(void *))) {
 162       debug_printf("sampler noop\n");
 163       return;
 164    }
 165
 166    for (i = 0; i < num; i++)
 167       svga->curr.sampler[i] = sampler[i];
 168
 169    for (i = num; i < svga->curr.num_samplers; i++)
 170       svga->curr.sampler[i] = NULL;
 171
 172    svga->curr.num_samplers = num;
 173    svga->dirty |= SVGA_NEW_SAMPLER;
 174 }
 175
 176 static void svga_delete_sampler_state(struct pipe_context *pipe,
 177                                       void *sampler)
 178 {
 179    FREE(sampler);
 180 }
 181
 182
 183 static void svga_set_sampler_textures(struct pipe_context *pipe,
 184                                       unsigned num,
 185                                       struct pipe_texture **texture)
 186 {
 187    struct svga_context *svga = svga_context(pipe);
 188    unsigned flag_1d = 0;
 189    unsigned flag_srgb = 0;
 190    uint i;
 191
 192    assert(num <= PIPE_MAX_SAMPLERS);
 193
 194    /* Check for no-op */
 195    if (num == svga->curr.num_textures &&
 196        !memcmp(svga->curr.texture, texture, num * sizeof(struct pipe_texture *))) {
 197       if (0) debug_printf("texture noop\n");
 198       return;
 199    }
 200
 201    for (i = 0; i < num; i++) {
 202       pipe_texture_reference(&svga->curr.texture[i],
 203                              texture[i]);
 204
 205       if (!texture[i])
 206          continue;
 207
 208       if (texture[i]->format == PIPE_FORMAT_A8R8G8B8_SRGB)
 209          flag_srgb |= 1 << i;
 210
 211       if (texture[i]->target == PIPE_TEXTURE_1D)
 212          flag_1d |= 1 << i;
 213    }
 214
 215    for (i = num; i < svga->curr.num_textures; i++)
 216       pipe_texture_reference(&svga->curr.texture[i],
 217                              NULL);
 218
 219    svga->curr.num_textures = num;
 220    svga->dirty |= SVGA_NEW_TEXTURE_BINDING;
 221
 222    if (flag_srgb != svga->curr.tex_flags.flag_srgb ||
 223        flag_1d != svga->curr.tex_flags.flag_1d)
 224    {
 225       svga->dirty |= SVGA_NEW_TEXTURE_FLAGS;
 226       svga->curr.tex_flags.flag_1d = flag_1d;
 227       svga->curr.tex_flags.flag_srgb = flag_srgb;
 228    }
 229 }
 230
 231
 232
 233 void svga_init_sampler_functions( struct svga_context *svga )
 234 {
 235    svga->pipe.create_sampler_state = svga_create_sampler_state;
 236    svga->pipe.bind_fragment_sampler_states = svga_bind_sampler_states;
 237    svga->pipe.delete_sampler_state = svga_delete_sampler_state;
 238    svga->pipe.set_fragment_sampler_textures = svga_set_sampler_textures;
 239 }
 240
 241
 242