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 #include "svga_state.h"
  36
  37 #include "svga_hw_reg.h"
  38
  39 #include "svga_debug.h"
  40
  41 static INLINE unsigned
  42 translate_wrap_mode(unsigned wrap)
  43 {
  44    switch (wrap) {
  45    case PIPE_TEX_WRAP_REPEAT:
  46       return SVGA3D_TEX_ADDRESS_WRAP;
  47
  48    case PIPE_TEX_WRAP_CLAMP:
  49       return SVGA3D_TEX_ADDRESS_CLAMP;
  50
  51    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  52       /* Unfortunately SVGA3D_TEX_ADDRESS_EDGE not respected by
  53        * hardware.
  54        */
  55       return SVGA3D_TEX_ADDRESS_CLAMP;
  56
  57    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  58       return SVGA3D_TEX_ADDRESS_BORDER;
  59
  60    case PIPE_TEX_WRAP_MIRROR_REPEAT:
  61       return SVGA3D_TEX_ADDRESS_MIRROR;
  62
  63    case PIPE_TEX_WRAP_MIRROR_CLAMP:
  64    case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
  65    case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
  66       return SVGA3D_TEX_ADDRESS_MIRRORONCE;
  67
  68    default:
  69       assert(0);
  70       return SVGA3D_TEX_ADDRESS_WRAP;
  71    }
  72 }
  73
  74 static INLINE unsigned translate_img_filter( unsigned filter )
  75 {
  76    switch (filter) {
  77    case PIPE_TEX_FILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
  78    case PIPE_TEX_FILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
  79    case PIPE_TEX_FILTER_ANISO:   return SVGA3D_TEX_FILTER_ANISOTROPIC;
  80    default:
  81       assert(0);
  82       return SVGA3D_TEX_FILTER_NEAREST;
  83    }
  84 }
  85
  86 static INLINE unsigned translate_mip_filter( unsigned filter )
  87 {
  88    switch (filter) {
  89    case PIPE_TEX_MIPFILTER_NONE:    return SVGA3D_TEX_FILTER_NONE;
  90    case PIPE_TEX_MIPFILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
  91    case PIPE_TEX_MIPFILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
  92    default:
  93       assert(0);
  94       return SVGA3D_TEX_FILTER_NONE;
  95    }
  96 }
  97
  98 static void *
  99 svga_create_sampler_state(struct pipe_context *pipe,
 100                           const struct pipe_sampler_state *sampler)
 101 {
 102    struct svga_context *svga = svga_context(pipe);
 103    struct svga_sampler_state *cso = CALLOC_STRUCT( svga_sampler_state );
 104
 105    cso->mipfilter = translate_mip_filter(sampler->min_mip_filter);
 106    cso->magfilter = translate_img_filter( sampler->mag_img_filter );
 107    cso->minfilter = translate_img_filter( sampler->min_img_filter );
 108    cso->aniso_level = MAX2( (unsigned) sampler->max_anisotropy, 1 );
 109    cso->lod_bias = sampler->lod_bias;
 110    cso->addressu = translate_wrap_mode(sampler->wrap_s);
 111    cso->addressv = translate_wrap_mode(sampler->wrap_t);
 112    cso->addressw = translate_wrap_mode(sampler->wrap_r);
 113    cso->normalized_coords = sampler->normalized_coords;
 114    cso->compare_mode = sampler->compare_mode;
 115    cso->compare_func = sampler->compare_func;
 116
 117    {
 118       ubyte r = float_to_ubyte(sampler->border_color[0]);
 119       ubyte g = float_to_ubyte(sampler->border_color[1]);
 120       ubyte b = float_to_ubyte(sampler->border_color[2]);
 121       ubyte a = float_to_ubyte(sampler->border_color[3]);
 122
 123       util_pack_color_ub( r, g, b, a,
 124                           PIPE_FORMAT_B8G8R8A8_UNORM,
 125                           &cso->bordercolor );
 126    }
 127
 128    /* No SVGA3D support for:
 129     *    - min/max LOD clamping
 130     */
 131    cso->min_lod = 0;
 132    cso->view_min_lod = MAX2(sampler->min_lod, 0);
 133    cso->view_max_lod = MAX2(sampler->max_lod, 0);
 134
 135    /* Use min_mipmap */
 136    if (svga->debug.use_min_mipmap) {
 137       if (cso->view_min_lod == cso->view_max_lod) {
 138          cso->min_lod = cso->view_min_lod;
 139          cso->view_min_lod = 0;
 140          cso->view_max_lod = 1000; /* Just a high number */
 141          cso->mipfilter = SVGA3D_TEX_FILTER_NONE;
 142       }
 143    }
 144
 145    SVGA_DBG(DEBUG_VIEWS, "min %u, view(min %u, max %u) lod, mipfilter %s\n",
 146             cso->min_lod, cso->view_min_lod, cso->view_max_lod,
 147             cso->mipfilter == SVGA3D_TEX_FILTER_NONE ? "SVGA3D_TEX_FILTER_NONE" : "SOMETHING");
 148
 149    return cso;
 150 }
 151
 152 static void svga_bind_sampler_states(struct pipe_context *pipe,
 153                                      unsigned num, void **sampler)
 154 {
 155    struct svga_context *svga = svga_context(pipe);
 156    unsigned i;
 157
 158    assert(num <= PIPE_MAX_SAMPLERS);
 159
 160    /* Check for no-op */
 161    if (num == svga->curr.num_samplers &&
 162        !memcmp(svga->curr.sampler, sampler, num * sizeof(void *))) {
 163       debug_printf("sampler noop\n");
 164       return;
 165    }
 166
 167    for (i = 0; i < num; i++)
 168       svga->curr.sampler[i] = sampler[i];
 169
 170    for (i = num; i < svga->curr.num_samplers; i++)
 171       svga->curr.sampler[i] = NULL;
 172
 173    svga->curr.num_samplers = num;
 174    svga->dirty |= SVGA_NEW_SAMPLER;
 175 }
 176
 177 static void svga_delete_sampler_state(struct pipe_context *pipe,
 178                                       void *sampler)
 179 {
 180    FREE(sampler);
 181 }
 182
 183
 184 static void svga_set_sampler_textures(struct pipe_context *pipe,
 185                                       unsigned num,
 186                                       struct pipe_texture **texture)
 187 {
 188    struct svga_context *svga = svga_context(pipe);
 189    unsigned flag_1d = 0;
 190    unsigned flag_srgb = 0;
 191    uint i;
 192
 193    assert(num <= PIPE_MAX_SAMPLERS);
 194
 195    /* Check for no-op */
 196    if (num == svga->curr.num_textures &&
 197        !memcmp(svga->curr.texture, texture, num * sizeof(struct pipe_texture *))) {
 198       if (0) debug_printf("texture noop\n");
 199       return;
 200    }
 201
 202    for (i = 0; i < num; i++) {
 203       pipe_texture_reference(&svga->curr.texture[i],
 204                              texture[i]);
 205
 206       if (!texture[i])
 207          continue;
 208
 209       if (texture[i]->format == PIPE_FORMAT_A8R8G8B8_SRGB)
 210          flag_srgb |= 1 << i;
 211
 212       if (texture[i]->target == PIPE_TEXTURE_1D)
 213          flag_1d |= 1 << i;
 214    }
 215
 216    for (i = num; i < svga->curr.num_textures; i++)
 217       pipe_texture_reference(&svga->curr.texture[i],
 218                              NULL);
 219
 220    svga->curr.num_textures = num;
 221    svga->dirty |= SVGA_NEW_TEXTURE_BINDING;
 222
 223    if (flag_srgb != svga->curr.tex_flags.flag_srgb ||
 224        flag_1d != svga->curr.tex_flags.flag_1d)
 225    {
 226       svga->dirty |= SVGA_NEW_TEXTURE_FLAGS;
 227       svga->curr.tex_flags.flag_1d = flag_1d;
 228       svga->curr.tex_flags.flag_srgb = flag_srgb;
 229    }
 230 }
 231
 232
 233
 234 void svga_init_sampler_functions( struct svga_context *svga )
 235 {
 236    svga->pipe.create_sampler_state = svga_create_sampler_state;
 237    svga->pipe.bind_sampler_states = svga_bind_sampler_states;
 238    svga->pipe.delete_sampler_state = svga_delete_sampler_state;
 239    svga->pipe.set_sampler_textures = svga_set_sampler_textures;
 240 }
 241
 242
 243