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