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 i915_texture *tex,
  50                            unsigned state[3] )
  51 {
  52    const struct pipe_texture *pt = &tex->base;
  53
  54    /* Need to do this after updating the maps, which call the
  55     * intel_finalize_mipmap_tree and hence can update firstLevel:
  56     */
  57    state[0] = sampler->state[0];
  58    state[1] = sampler->state[1];
  59    state[2] = sampler->state[2];
  60
  61    if (pt->format == PIPE_FORMAT_YCBCR ||
  62        pt->format == PIPE_FORMAT_YCBCR_REV)
  63       state[0] |= SS2_COLORSPACE_CONVERSION;
  64
  65    /* 3D textures don't seem to respect the border color.
  66     * Fallback if there's ever a danger that they might refer to
  67     * it.
  68     *
  69     * Effectively this means fallback on 3D clamp or
  70     * clamp_to_border.
  71     *
  72     * XXX: Check if this is true on i945.
  73     * XXX: Check if this bug got fixed in release silicon.
  74     */
  75 #if 0
  76    {
  77       const unsigned ws = sampler->templ->wrap_s;
  78       const unsigned wt = sampler->templ->wrap_t;
  79       const unsigned wr = sampler->templ->wrap_r;
  80       if (pt->target == PIPE_TEXTURE_3D &&
  81           (sampler->templ->min_img_filter != PIPE_TEX_FILTER_NEAREST ||
  82            sampler->templ->mag_img_filter != PIPE_TEX_FILTER_NEAREST) &&
  83           (ws == PIPE_TEX_WRAP_CLAMP ||
  84            wt == PIPE_TEX_WRAP_CLAMP ||
  85            wr == PIPE_TEX_WRAP_CLAMP ||
  86            ws == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
  87            wt == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
  88            wr == PIPE_TEX_WRAP_CLAMP_TO_BORDER)) {
  89          if (i915->strict_conformance) {
  90             assert(0);
  91             /*      sampler->fallback = true; */
  92             /* TODO */
  93          }
  94       }
  95    }
  96 #endif
  97
  98    state[1] |= (unit << SS3_TEXTUREMAP_INDEX_SHIFT);
  99 }
 100
 101
 102 void i915_update_samplers( struct i915_context *i915 )
 103 {
 104    uint unit;
 105
 106    i915->current.sampler_enable_nr = 0;
 107    i915->current.sampler_enable_flags = 0x0;
 108
 109    for (unit = 0; unit < I915_TEX_UNITS; unit++) {
 110       /* determine unit enable/disable by looking for a bound texture */
 111       /* could also examine the fragment program? */
 112       if (i915->texture[unit]) {
 113          update_sampler( i915,
 114                          unit,
 115                          i915->sampler[unit],       /* sampler state */
 116                          i915->texture[unit],        /* texture */
 117                          i915->current.sampler[unit] /* the result */
 118                          );
 119
 120          i915->current.sampler_enable_nr++;
 121          i915->current.sampler_enable_flags |= (1 << unit);
 122       }
 123    }
 124
 125    i915->hardware_dirty |= I915_HW_SAMPLER;
 126 }
 127
 128
 129 static uint
 130 translate_texture_format(enum pipe_format pipeFormat)
 131 {
 132    switch (pipeFormat) {
 133    case PIPE_FORMAT_U_L8:
 134       return MAPSURF_8BIT | MT_8BIT_L8;
 135    case PIPE_FORMAT_U_I8:
 136       return MAPSURF_8BIT | MT_8BIT_I8;
 137    case PIPE_FORMAT_U_A8:
 138       return MAPSURF_8BIT | MT_8BIT_A8;
 139    case PIPE_FORMAT_U_A8_L8:
 140       return MAPSURF_16BIT | MT_16BIT_AY88;
 141    case PIPE_FORMAT_R5G6B5_UNORM:
 142       return MAPSURF_16BIT | MT_16BIT_RGB565;
 143    case PIPE_FORMAT_A1R5G5B5_UNORM:
 144       return MAPSURF_16BIT | MT_16BIT_ARGB1555;
 145    case PIPE_FORMAT_A4R4G4B4_UNORM:
 146       return MAPSURF_16BIT | MT_16BIT_ARGB4444;
 147    case PIPE_FORMAT_A8R8G8B8_UNORM:
 148       return MAPSURF_32BIT | MT_32BIT_ARGB8888;
 149    case PIPE_FORMAT_YCBCR_REV:
 150       return (MAPSURF_422 | MT_422_YCRCB_NORMAL);
 151    case PIPE_FORMAT_YCBCR:
 152       return (MAPSURF_422 | MT_422_YCRCB_SWAPY);
 153 #if 0
 154    case PIPE_FORMAT_RGB_FXT1:
 155    case PIPE_FORMAT_RGBA_FXT1:
 156       return (MAPSURF_COMPRESSED | MT_COMPRESS_FXT1);
 157 #endif
 158    case PIPE_FORMAT_Z16_UNORM:
 159       return (MAPSURF_16BIT | MT_16BIT_L16);
 160 #if 0
 161    case PIPE_FORMAT_RGBA_DXT1:
 162    case PIPE_FORMAT_RGB_DXT1:
 163       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT1);
 164    case PIPE_FORMAT_RGBA_DXT3:
 165       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT2_3);
 166    case PIPE_FORMAT_RGBA_DXT5:
 167       return (MAPSURF_COMPRESSED | MT_COMPRESS_DXT4_5);
 168 #endif
 169    case PIPE_FORMAT_S8Z24_UNORM:
 170       return (MAPSURF_32BIT | MT_32BIT_xL824);
 171    default:
 172       fprintf(stderr, "i915: translate_texture_format() bad image format %x\n",
 173               pipeFormat);
 174       assert(0);
 175       return 0;
 176    }
 177 }
 178
 179
 180 static void
 181 i915_update_texture(struct i915_context *i915, uint unit,
 182                     uint state[6])
 183 {
 184    const struct i915_texture *tex = i915->texture[unit];
 185    const struct pipe_texture *pt = &tex->base;
 186    uint format, pitch;
 187    const uint width = pt->width[0], height = pt->height[0], depth = pt->depth[0];
 188    const uint num_levels = pt->last_level - pt->first_level;
 189
 190    assert(tex);
 191    assert(width);
 192    assert(height);
 193    assert(depth);
 194
 195    format = translate_texture_format(pt->format);
 196    pitch = tex->pitch * pt->cpp;
 197
 198    assert(format);
 199    assert(pitch);
 200
 201    /* MS3 state */
 202    state[0] =
 203       (((height - 1) << MS3_HEIGHT_SHIFT)
 204        | ((width - 1) << MS3_WIDTH_SHIFT)
 205        | format
 206        | MS3_USE_FENCE_REGS);
 207
 208    /* MS4 state */
 209    state[1] =
 210       ((((pitch / 4) - 1) << MS4_PITCH_SHIFT)
 211        | MS4_CUBE_FACE_ENA_MASK
 212        | ((num_levels * 4) << MS4_MAX_LOD_SHIFT)
 213        | ((depth - 1) << MS4_VOLUME_DEPTH_SHIFT));
 214 }
 215
 216
 217 void
 218 i915_update_textures(struct i915_context *i915)
 219 {
 220    uint unit;
 221
 222    for (unit = 0; unit < I915_TEX_UNITS; unit++) {
 223       /* determine unit enable/disable by looking for a bound texture */
 224       /* could also examine the fragment program? */
 225       if (i915->texture[unit]) {
 226          i915_update_texture(i915, unit, i915->current.texbuffer[unit]);
 227       }
 228    }
 229
 230    i915->hardware_dirty |= I915_HW_MAP;
 231 }