src/mesa/drivers/dri/i965/brw_tex_layout.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a 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, sublicense, 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
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32 /* Code to layout images in a mipmap tree for i965.
  33  */
  34
  35 #include "intel_mipmap_tree.h"
  36 #include "intel_tex_layout.h"
  37 #include "intel_context.h"
  38 #include "main/macros.h"
  39
  40 #define FILE_DEBUG_FLAG DEBUG_MIPTREE
  41
  42 GLboolean brw_miptree_layout(struct intel_context *intel,
  43                              struct intel_mipmap_tree *mt,
  44                              uint32_t tiling)
  45 {
  46    /* XXX: these vary depending on image format: */
  47    /* GLint align_w = 4; */
  48
  49    switch (mt->target) {
  50    case GL_TEXTURE_CUBE_MAP:
  51       if (intel->is_ironlake) {
  52           GLuint align_h = 2, align_w = 4;
  53           GLuint level;
  54           GLuint x = 0;
  55           GLuint y = 0;
  56           GLuint width = mt->width0;
  57           GLuint height = mt->height0;
  58           GLuint qpitch = 0;
  59           GLuint y_pitch = 0;
  60
  61           mt->pitch = mt->width0;
  62           intel_get_texture_alignment_unit(mt->internal_format, &align_w, &align_h);
  63           y_pitch = ALIGN(height, align_h);
  64
  65           if (mt->compressed) {
  66               mt->pitch = ALIGN(mt->width0, align_w);
  67           }
  68
  69           if (mt->first_level != mt->last_level) {
  70               GLuint mip1_width;
  71
  72               if (mt->compressed) {
  73                   mip1_width = ALIGN(minify(mt->width0), align_w)
  74                       + ALIGN(minify(minify(mt->width0)), align_w);
  75               } else {
  76                   mip1_width = ALIGN(minify(mt->width0), align_w)
  77                       + minify(minify(mt->width0));
  78               }
  79
  80               if (mip1_width > mt->pitch) {
  81                   mt->pitch = mip1_width;
  82               }
  83           }
  84
  85           mt->pitch = intel_miptree_pitch_align(intel, mt, tiling, mt->pitch);
  86
  87           if (mt->compressed) {
  88               qpitch = (y_pitch + ALIGN(minify(y_pitch), align_h) + 11 * align_h) / 4;
  89               mt->total_height = (y_pitch + ALIGN(minify(y_pitch), align_h) + 11 * align_h) / 4 * 6;
  90           } else {
  91               qpitch = (y_pitch + ALIGN(minify(y_pitch), align_h) + 11 * align_h);
  92               mt->total_height = (y_pitch + ALIGN(minify(y_pitch), align_h) + 11 * align_h) * 6;
  93           }
  94
  95           for (level = mt->first_level; level <= mt->last_level; level++) {
  96               GLuint img_height;
  97               GLuint nr_images = 6;
  98               GLuint q = 0;
  99
 100               intel_miptree_set_level_info(mt, level, nr_images, x, y, width,
 101                                            height, 1);
 102
 103               for (q = 0; q < nr_images; q++)
 104                   intel_miptree_set_image_offset(mt, level, q,
 105                                                  x, y + q * qpitch);
 106
 107               if (mt->compressed)
 108                   img_height = MAX2(1, height/4);
 109               else
 110                   img_height = ALIGN(height, align_h);
 111
 112               if (level == mt->first_level + 1) {
 113                   x += ALIGN(width, align_w);
 114               }
 115               else {
 116                   y += img_height;
 117               }
 118
 119               width  = minify(width);
 120               height = minify(height);
 121           }
 122
 123           break;
 124       }
 125
 126    case GL_TEXTURE_3D: {
 127       GLuint width  = mt->width0;
 128       GLuint height = mt->height0;
 129       GLuint depth = mt->depth0;
 130       GLuint pack_x_pitch, pack_x_nr;
 131       GLuint pack_y_pitch;
 132       GLuint level;
 133       GLuint align_h = 2;
 134       GLuint align_w = 4;
 135
 136       mt->total_height = 0;
 137       intel_get_texture_alignment_unit(mt->internal_format, &align_w, &align_h);
 138
 139       if (mt->compressed) {
 140           mt->pitch = ALIGN(width, align_w);
 141           pack_y_pitch = (height + 3) / 4;
 142       } else {
 143          mt->pitch = intel_miptree_pitch_align (intel, mt, tiling, mt->width0);
 144          pack_y_pitch = ALIGN(mt->height0, align_h);
 145       }
 146
 147       pack_x_pitch = width;
 148       pack_x_nr = 1;
 149
 150       for (level = mt->first_level ; level <= mt->last_level ; level++) {
 151          GLuint nr_images = mt->target == GL_TEXTURE_3D ? depth : 6;
 152          GLint x = 0;
 153          GLint y = 0;
 154          GLint q, j;
 155
 156          intel_miptree_set_level_info(mt, level, nr_images,
 157                                       0, mt->total_height,
 158                                       width, height, depth);
 159
 160          for (q = 0; q < nr_images;) {
 161             for (j = 0; j < pack_x_nr && q < nr_images; j++, q++) {
 162                intel_miptree_set_image_offset(mt, level, q, x, y);
 163                x += pack_x_pitch;
 164             }
 165
 166             x = 0;
 167             y += pack_y_pitch;
 168          }
 169
 170
 171          mt->total_height += y;
 172          width  = minify(width);
 173          height = minify(height);
 174          depth  = minify(depth);
 175
 176          if (mt->compressed) {
 177             pack_y_pitch = (height + 3) / 4;
 178
 179             if (pack_x_pitch > ALIGN(width, align_w)) {
 180                pack_x_pitch = ALIGN(width, align_w);
 181                pack_x_nr <<= 1;
 182             }
 183          } else {
 184             if (pack_x_pitch > 4) {
 185                pack_x_pitch >>= 1;
 186                pack_x_nr <<= 1;
 187                assert(pack_x_pitch * pack_x_nr <= mt->pitch);
 188             }
 189
 190             if (pack_y_pitch > 2) {
 191                pack_y_pitch >>= 1;
 192                pack_y_pitch = ALIGN(pack_y_pitch, align_h);
 193             }
 194          }
 195
 196       }
 197       /* The 965's sampler lays cachelines out according to how accesses
 198        * in the texture surfaces run, so they may be "vertical" through
 199        * memory.  As a result, the docs say in Surface Padding Requirements:
 200        * Sampling Engine Surfaces that two extra rows of padding are required.
 201        * We don't know of similar requirements for pre-965, but given that
 202        * those docs are silent on padding requirements in general, let's play
 203        * it safe.
 204        */
 205       if (mt->target == GL_TEXTURE_CUBE_MAP)
 206          mt->total_height += 2;
 207       break;
 208    }
 209
 210    default:
 211       i945_miptree_layout_2d(intel, mt, tiling);
 212       break;
 213    }
 214    DBG("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__,
 215                 mt->pitch,
 216                 mt->total_height,
 217                 mt->cpp,
 218                 mt->pitch * mt->total_height * mt->cpp );
 219
 220    return GL_TRUE;
 221 }
 222