src/mesa/pipe/i915simple/i915_state_sampler.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 //#include "mtypes.h"
  29 //#include "enums.h"
  30 //#include "texformat.h"
  31 //#include "macros.h"
  32 //#include "dri_bufmgr.h"
  33
  34
  35 #include "pipe/p_context.h"
  36 #include "pipe/p_state.h"
  37 #include "pipe/p_util.h"
  38
  39 #include "i915_state_inlines.h"
  40 #include "i915_context.h"
  41 #include "i915_reg.h"
  42 #include "i915_state.h"
  43 //#include "i915_cache.h"
  44
  45 static uint
  46 bitcount(uint k)
  47 {
  48    uint count = 0;
  49    while (k) {
  50       if (k & 1)
  51          count++;
  52       k = k >> 1;
  53    }
  54    return count;
  55 }
  56
  57
  58 static boolean
  59 is_power_of_two_texture(const struct pipe_mipmap_tree *mt)
  60 {
  61    if (bitcount(mt->width0) == 1 &&
  62        bitcount(mt->height0) == 1 &&
  63        bitcount(mt->depth0) == 1) {
  64       return 1;
  65    }
  66    else
  67       return 0;
  68 }
  69
  70
  71 /**
  72  * Compute i915 texture sampling state.
  73  *
  74  * Recalculate all state from scratch.  Perhaps not the most
  75  * efficient, but this has gotten complex enough that we need
  76  * something which is understandable and reliable.
  77  * \param state  returns the 3 words of compute state
  78  */
  79 static void update_sampler(struct i915_context *i915,
  80                            uint unit,
  81                            const struct i915_sampler_state *sampler,
  82                            const struct pipe_mipmap_tree *mt,
  83                            unsigned state[3] )
  84 {
  85    /* Need to do this after updating the maps, which call the
  86     * intel_finalize_mipmap_tree and hence can update firstLevel:
  87     */
  88    state[0] = sampler->state[0];
  89    state[1] = sampler->state[1];
  90    state[2] = sampler->state[2];
  91
  92    if (mt->format == PIPE_FORMAT_YCBCR ||
  93        mt->format == PIPE_FORMAT_YCBCR_REV)
  94       state[0] |= SS2_COLORSPACE_CONVERSION;
  95
  96    /* 3D textures don't seem to respect the border color.
  97     * Fallback if there's ever a danger that they might refer to
  98     * it.
  99     *
 100     * Effectively this means fallback on 3D clamp or
 101     * clamp_to_border.
 102     *
 103     * XXX: Check if this is true on i945.
 104     * XXX: Check if this bug got fixed in release silicon.
 105     */
 106 #if 0
 107    {
 108       const unsigned ws = sampler->templ->wrap_s;
 109       const unsigned wt = sampler->templ->wrap_t;
 110       const unsigned wr = sampler->templ->wrap_r;
 111       if (mt->target == PIPE_TEXTURE_3D &&
 112           (sampler->templ->min_img_filter != PIPE_TEX_FILTER_NEAREST ||
 113            sampler->templ->mag_img_filter != PIPE_TEX_FILTER_NEAREST) &&
 114           (ws == PIPE_TEX_WRAP_CLAMP ||
 115            wt == PIPE_TEX_WRAP_CLAMP ||
 116            wr == PIPE_TEX_WRAP_CLAMP ||
 117            ws == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
 118            wt == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
 119            wr == PIPE_TEX_WRAP_CLAMP_TO_BORDER)) {
 120          if (i915->strict_conformance) {
 121             assert(0);
 122             /*      sampler->fallback = true; */
 123             /* TODO */
 124          }
 125       }
 126    }
 127 #endif
 128
 129    state[1] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
 130
 131    if (is_power_of_two_texture(mt)) {
 132       state[1] |= SS3_NORMALIZED_COORDS;
 133    }
 134 }
 135
 136 void i915_update_samplers( struct i915_context *i915 )
 137 {
 138    uint unit;
 139
 140    i915->current.sampler_enable_nr = 0;
 141    i915->current.sampler_enable_flags = 0x0;
 142
 143    for (unit = 0; unit < I915_TEX_UNITS; unit++) {
 144       /* determine unit enable/disable by looking for a bound mipmap tree */
 145       /* could also examine the fragment program? */
 146       if (i915->texture[unit]) {
 147          update_sampler( i915,
 148                          unit,
 149                          i915->sampler[unit],       /* sampler state */
 150                          i915->texture[unit],        /* mipmap tree */
 151                          i915->current.sampler[unit] /* the result */
 152                          );
 153
 154          i915->current.sampler_enable_nr++;
 155          i915->current.sampler_enable_flags |= (1 << unit);
 156       }
 157    }
 158
 159    i915->hardware_dirty |= I915_HW_SAMPLER;
 160 }
 161
 162
 163
 164
 165 static uint
 166 translate_texture_format(uint pipeFormat)
 167 {
 168    switch (pipeFormat) {
 169    case PIPE_FORMAT_U_L8:
 170       return MAPSURF_8BIT | MT_8BIT_L8;
 171    case PIPE_FORMAT_U_I8:
 172       return MAPSURF_8BIT | MT_8BIT_I8;
 173    case PIPE_FORMAT_U_A8:
 174       return MAPSURF_8BIT | MT_8BIT_A8;
 175    case PIPE_FORMAT_U_A8_L8:
 176       return MAPSURF_16BIT | MT_16BIT_AY88;
 177    case PIPE_FORMAT_U_R5_G6_B5:
 178       return MAPSURF_16BIT | MT_16BIT_RGB565;
 179    case PIPE_FORMAT_U_A1_R5_G5_B5:
 180       return MAPSURF_16BIT | MT_16BIT_ARGB1555;
 181    case PIPE_FORMAT_U_A4_R4_G4_B4:
 182       return MAPSURF_16BIT | MT_16BIT_ARGB4444;
 183    case PIPE_FORMAT_U_A8_R8_G8_B8:
 184       return MAPSURF_32BIT | MT_32BIT_ARGB8888;
 185    case PIPE_FORMAT_YCBCR_REV:
 186       return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
 187    case PIPE_FORMAT_YCBCR:
 188       return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
 189 #if 0
 190    case PIPE_FORMAT_RGB_FXT1:
 191    case PIPE_FORMAT_RGBA_FXT1:
 192       return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
 193 #endif
 194    case PIPE_FORMAT_U_Z16:
 195       return (MAPSURF_16BIT | MT_16BIT_L16);
 196 #if 0
 197    case PIPE_FORMAT_RGBA_DXT1:
 198    case PIPE_FORMAT_RGB_DXT1:
 199       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
 200    case PIPE_FORMAT_RGBA_DXT3:
 201       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
 202    case PIPE_FORMAT_RGBA_DXT5:
 203       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
 204 #endif
 205    case PIPE_FORMAT_S8_Z24:
 206       return (MAPSURF_32BIT | MT_32BIT_xL824);
 207    default:
 208       fprintf(stderr, "i915: translate_texture_format() bad image format %x\n",
 209               pipeFormat);
 210       assert(0);
 211       return 0;
 212    }
 213 }
 214
 215
 216 #define I915_TEXREG_MS3        1
 217 #define I915_TEXREG_MS4        2
 218
 219
 220 static void
 221 i915_update_texture(struct i915_context *i915, uint unit,
 222                     uint state[6])
 223 {
 224    const struct pipe_mipmap_tree *mt = i915->texture[unit];
 225    uint format, pitch;
 226    const uint width = mt->width0, height = mt->height0, depth = mt->depth0;
 227    const uint num_levels = mt->last_level - mt->first_level;
 228
 229    assert(mt);
 230    assert(width);
 231    assert(height);
 232    assert(depth);
 233
 234 #if 0
 235    if (i915->state.tex_buffer[unit] != NULL) {
 236        driBOUnReference(i915->state.tex_buffer[unit]);
 237        i915->state.tex_buffer[unit] = NULL;
 238    }
 239 #endif
 240
 241
 242    {
 243       /*struct pipe_buffer_handle *p =*/ driBOReference(mt->region->buffer);
 244    }
 245
 246 #if 0
 247    i915->state.tex_buffer[unit] = driBOReference(intelObj->mt->region->
 248                                                  buffer);
 249    i915->state.tex_offset[unit] =  intel_miptree_image_offset(intelObj->mt,
 250                                                               0, intelObj->
 251                                                               firstLevel);
 252 #endif
 253
 254    format = translate_texture_format(mt->format);
 255    pitch = mt->pitch * mt->cpp;
 256
 257    assert(format);
 258    assert(pitch);
 259
 260    /*
 261    printf("texture format = 0x%x\n", format);
 262    */
 263
 264    /* MS3 state */
 265    state[0] =
 266       (((height - 1) << MS3_HEIGHT_SHIFT)
 267        | ((width - 1) << MS3_WIDTH_SHIFT)
 268        | format
 269        | MS3_USE_FENCE_REGS);
 270
 271    /* MS4 state */
 272    state[1] =
 273       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT)
 274        | MS4_CUBE_FACE_ENA_MASK
 275        | ((num_levels * 4) << MS4_MAX_LOD_SHIFT)
 276        | ((depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
 277 }
 278
 279
 280
 281 void
 282 i915_update_textures(struct i915_context *i915)
 283 {
 284    uint unit;
 285
 286    for (unit = 0; unit < I915_TEX_UNITS; unit++) {
 287       /* determine unit enable/disable by looking for a bound mipmap tree */
 288       /* could also examine the fragment program? */
 289       if (i915->texture[unit]) {
 290          i915_update_texture(i915, unit, i915->current.texbuffer[unit]);
 291       }
 292    }
 293
 294    i915->hardware_dirty |= I915_HW_MAP;
 295 }