src/mesa/drivers/dri/radeon/radeon_mipmap_tree.c

   1 /*
   2  * Copyright (C) 2008 Nicolai Haehnle.
   3  *
   4  * All Rights Reserved.
   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 #include "radeon_mipmap_tree.h"
  29
  30 #include <errno.h>
  31 #include <unistd.h>
  32
  33 #include "main/simple_list.h"
  34 #include "main/texcompress.h"
  35 #include "main/texformat.h"
  36
  37 static GLuint radeon_compressed_texture_size(GLcontext *ctx,
  38                 GLsizei width, GLsizei height, GLsizei depth,
  39                 GLuint mesaFormat)
  40 {
  41         GLuint size = _mesa_compressed_texture_size(ctx, width, height, depth, mesaFormat);
  42
  43         if (mesaFormat == MESA_FORMAT_RGB_DXT1 ||
  44             mesaFormat == MESA_FORMAT_RGBA_DXT1) {
  45                 if (width + 3 < 8)      /* width one block */
  46                         size = size * 4;
  47                 else if (width + 3 < 16)
  48                         size = size * 2;
  49         } else {
  50                 /* DXT3/5, 16 bytes per block */
  51           //            WARN_ONCE("DXT 3/5 suffers from multitexturing problems!\n");
  52                 if (width + 3 < 8)
  53                         size = size * 2;
  54         }
  55
  56         return size;
  57 }
  58
  59
  60 static int radeon_compressed_num_bytes(GLuint mesaFormat)
  61 {
  62    int bytes = 0;
  63    switch(mesaFormat) {
  64
  65    case MESA_FORMAT_RGB_FXT1:
  66    case MESA_FORMAT_RGBA_FXT1:
  67    case MESA_FORMAT_RGB_DXT1:
  68    case MESA_FORMAT_RGBA_DXT1:
  69      bytes = 2;
  70      break;
  71
  72    case MESA_FORMAT_RGBA_DXT3:
  73    case MESA_FORMAT_RGBA_DXT5:
  74      bytes = 4;
  75    default:
  76      break;
  77    }
  78
  79    return bytes;
  80 }
  81
  82 /**
  83  * Compute sizes and fill in offset and blit information for the given
  84  * image (determined by \p face and \p level).
  85  *
  86  * \param curOffset points to the offset at which the image is to be stored
  87  * and is updated by this function according to the size of the image.
  88  */
  89 static void compute_tex_image_offset(radeonContextPtr rmesa, radeon_mipmap_tree *mt,
  90         GLuint face, GLuint level, GLuint* curOffset)
  91 {
  92         radeon_mipmap_level *lvl = &mt->levels[level];
  93         uint32_t row_align;
  94
  95         /* Find image size in bytes */
  96         if (mt->compressed) {
  97                 /* TODO: Is this correct? Need test cases for compressed textures! */
  98                 row_align = rmesa->texture_compressed_row_align - 1;
  99                 lvl->rowstride = (lvl->width * mt->bpp + row_align) & ~row_align;
 100                 lvl->size = radeon_compressed_texture_size(mt->radeon->glCtx,
 101                                                            lvl->width, lvl->height, lvl->depth, mt->compressed);
 102         } else if (mt->target == GL_TEXTURE_RECTANGLE_NV) {
 103                 row_align = rmesa->texture_rect_row_align - 1;
 104                 lvl->rowstride = (lvl->width * mt->bpp + row_align) & ~row_align;
 105                 lvl->size = lvl->rowstride * lvl->height;
 106         } else if (mt->tilebits & RADEON_TXO_MICRO_TILE) {
 107                 /* tile pattern is 16 bytes x2. mipmaps stay 32 byte aligned,
 108                  * though the actual offset may be different (if texture is less than
 109                  * 32 bytes width) to the untiled case */
 110                 lvl->rowstride = (lvl->width * mt->bpp * 2 + 31) & ~31;
 111                 lvl->size = lvl->rowstride * ((lvl->height + 1) / 2) * lvl->depth;
 112         } else {
 113                 row_align = rmesa->texture_row_align - 1;
 114                 lvl->rowstride = (lvl->width * mt->bpp + row_align) & ~row_align;
 115                 lvl->size = lvl->rowstride * lvl->height * lvl->depth;
 116         }
 117         assert(lvl->size > 0);
 118
 119         /* All images are aligned to a 32-byte offset */
 120         *curOffset = (*curOffset + 0x1f) & ~0x1f;
 121         lvl->faces[face].offset = *curOffset;
 122         *curOffset += lvl->size;
 123
 124         if (RADEON_DEBUG & DEBUG_TEXTURE)
 125           fprintf(stderr,
 126                   "level %d, face %d: rs:%d %dx%d at %d\n",
 127                   level, face, lvl->rowstride, lvl->width, lvl->height, lvl->faces[face].offset);
 128 }
 129
 130 static GLuint minify(GLuint size, GLuint levels)
 131 {
 132         size = size >> levels;
 133         if (size < 1)
 134                 size = 1;
 135         return size;
 136 }
 137
 138
 139 static void calculate_miptree_layout_r100(radeonContextPtr rmesa, radeon_mipmap_tree *mt)
 140 {
 141         GLuint curOffset;
 142         GLuint numLevels;
 143         GLuint i;
 144         GLuint face;
 145
 146         numLevels = mt->lastLevel - mt->firstLevel + 1;
 147         assert(numLevels <= rmesa->glCtx->Const.MaxTextureLevels);
 148
 149         curOffset = 0;
 150         for(face = 0; face < mt->faces; face++) {
 151
 152                 for(i = 0; i < numLevels; i++) {
 153                         mt->levels[i].width = minify(mt->width0, i);
 154                         mt->levels[i].height = minify(mt->height0, i);
 155                         mt->levels[i].depth = minify(mt->depth0, i);
 156                         compute_tex_image_offset(rmesa, mt, face, i, &curOffset);
 157                 }
 158         }
 159
 160         /* Note the required size in memory */
 161         mt->totalsize = (curOffset + RADEON_OFFSET_MASK) & ~RADEON_OFFSET_MASK;
 162 }
 163
 164 static void calculate_miptree_layout_r300(radeonContextPtr rmesa, radeon_mipmap_tree *mt)
 165 {
 166         GLuint curOffset;
 167         GLuint numLevels;
 168         GLuint i;
 169
 170         numLevels = mt->lastLevel - mt->firstLevel + 1;
 171         assert(numLevels <= rmesa->glCtx->Const.MaxTextureLevels);
 172
 173         curOffset = 0;
 174         for(i = 0; i < numLevels; i++) {
 175                 GLuint face;
 176
 177                 mt->levels[i].width = minify(mt->width0, i);
 178                 mt->levels[i].height = minify(mt->height0, i);
 179                 mt->levels[i].depth = minify(mt->depth0, i);
 180
 181                 for(face = 0; face < mt->faces; face++)
 182                         compute_tex_image_offset(rmesa, mt, face, i, &curOffset);
 183         }
 184
 185         /* Note the required size in memory */
 186         mt->totalsize = (curOffset + RADEON_OFFSET_MASK) & ~RADEON_OFFSET_MASK;
 187 }
 188
 189 /**
 190  * Create a new mipmap tree, calculate its layout and allocate memory.
 191  */
 192 radeon_mipmap_tree* radeon_miptree_create(radeonContextPtr rmesa, radeonTexObj *t,
 193                 GLenum target, GLuint firstLevel, GLuint lastLevel,
 194                 GLuint width0, GLuint height0, GLuint depth0,
 195                 GLuint bpp, GLuint tilebits, GLuint compressed)
 196 {
 197         radeon_mipmap_tree *mt = CALLOC_STRUCT(_radeon_mipmap_tree);
 198
 199         mt->radeon = rmesa;
 200         mt->refcount = 1;
 201         mt->t = t;
 202         mt->target = target;
 203         mt->faces = (target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 204         mt->firstLevel = firstLevel;
 205         mt->lastLevel = lastLevel;
 206         mt->width0 = width0;
 207         mt->height0 = height0;
 208         mt->depth0 = depth0;
 209         mt->bpp = compressed ? radeon_compressed_num_bytes(compressed) : bpp;
 210         mt->tilebits = tilebits;
 211         mt->compressed = compressed;
 212
 213         if (rmesa->radeonScreen->chip_family >= CHIP_FAMILY_R300)
 214                 calculate_miptree_layout_r300(rmesa, mt);
 215         else
 216                 calculate_miptree_layout_r100(rmesa, mt);
 217
 218         mt->bo = radeon_bo_open(rmesa->radeonScreen->bom,
 219                             0, mt->totalsize, 1024,
 220                             RADEON_GEM_DOMAIN_VRAM,
 221                             0);
 222
 223         return mt;
 224 }
 225
 226 void radeon_miptree_reference(radeon_mipmap_tree *mt)
 227 {
 228         mt->refcount++;
 229         assert(mt->refcount > 0);
 230 }
 231
 232 void radeon_miptree_unreference(radeon_mipmap_tree *mt)
 233 {
 234         if (!mt)
 235                 return;
 236
 237         assert(mt->refcount > 0);
 238         mt->refcount--;
 239         if (!mt->refcount) {
 240                 radeon_bo_unref(mt->bo);
 241                 free(mt);
 242         }
 243 }
 244
 245
 246 /**
 247  * Calculate first and last mip levels for the given texture object,
 248  * where the dimensions are taken from the given texture image at
 249  * the given level.
 250  *
 251  * Note: level is the OpenGL level number, which is not necessarily the same
 252  * as the first level that is actually present.
 253  *
 254  * The base level image of the given texture face must be non-null,
 255  * or this will fail.
 256  */
 257 static void calculate_first_last_level(struct gl_texture_object *tObj,
 258                                        GLuint *pfirstLevel, GLuint *plastLevel,
 259                                        GLuint face, GLuint level)
 260 {
 261         const struct gl_texture_image * const baseImage =
 262                 tObj->Image[face][level];
 263
 264         assert(baseImage);
 265
 266         /* These must be signed values.  MinLod and MaxLod can be negative numbers,
 267         * and having firstLevel and lastLevel as signed prevents the need for
 268         * extra sign checks.
 269         */
 270         int   firstLevel;
 271         int   lastLevel;
 272
 273         /* Yes, this looks overly complicated, but it's all needed.
 274         */
 275         switch (tObj->Target) {
 276         case GL_TEXTURE_1D:
 277         case GL_TEXTURE_2D:
 278         case GL_TEXTURE_3D:
 279         case GL_TEXTURE_CUBE_MAP:
 280                 if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
 281                         /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
 282                         */
 283                         firstLevel = lastLevel = tObj->BaseLevel;
 284                 } else {
 285                         firstLevel = tObj->BaseLevel + (GLint)(tObj->MinLod + 0.5);
 286                         firstLevel = MAX2(firstLevel, tObj->BaseLevel);
 287                         firstLevel = MIN2(firstLevel, level + baseImage->MaxLog2);
 288                         lastLevel = tObj->BaseLevel + (GLint)(tObj->MaxLod + 0.5);
 289                         lastLevel = MAX2(lastLevel, tObj->BaseLevel);
 290                         lastLevel = MIN2(lastLevel, level + baseImage->MaxLog2);
 291                         lastLevel = MIN2(lastLevel, tObj->MaxLevel);
 292                         lastLevel = MAX2(firstLevel, lastLevel); /* need at least one level */
 293                 }
 294                 break;
 295         case GL_TEXTURE_RECTANGLE_NV:
 296         case GL_TEXTURE_4D_SGIS:
 297                 firstLevel = lastLevel = 0;
 298                 break;
 299         default:
 300                 return;
 301         }
 302
 303         /* save these values */
 304         *pfirstLevel = firstLevel;
 305         *plastLevel = lastLevel;
 306 }
 307
 308
 309 /**
 310  * Checks whether the given miptree can hold the given texture image at the
 311  * given face and level.
 312  */
 313 GLboolean radeon_miptree_matches_image(radeon_mipmap_tree *mt,
 314                 struct gl_texture_image *texImage, GLuint face, GLuint level)
 315 {
 316         radeon_mipmap_level *lvl;
 317
 318         if (face >= mt->faces || level < mt->firstLevel || level > mt->lastLevel)
 319                 return GL_FALSE;
 320
 321         if ((!texImage->IsCompressed && mt->compressed) ||
 322             (texImage->IsCompressed && !mt->compressed))
 323                 return GL_FALSE;
 324
 325         if (!texImage->IsCompressed &&
 326             !mt->compressed &&
 327             texImage->TexFormat->TexelBytes != mt->bpp)
 328                 return GL_FALSE;
 329
 330         lvl = &mt->levels[level - mt->firstLevel];
 331         if (lvl->width != texImage->Width ||
 332             lvl->height != texImage->Height ||
 333             lvl->depth != texImage->Depth)
 334                 return GL_FALSE;
 335
 336         return GL_TRUE;
 337 }
 338
 339
 340 /**
 341  * Checks whether the given miptree has the right format to store the given texture object.
 342  */
 343 GLboolean radeon_miptree_matches_texture(radeon_mipmap_tree *mt, struct gl_texture_object *texObj)
 344 {
 345         struct gl_texture_image *firstImage;
 346         GLuint compressed;
 347         GLuint numfaces = 1;
 348         GLuint firstLevel, lastLevel;
 349
 350         calculate_first_last_level(texObj, &firstLevel, &lastLevel, 0, texObj->BaseLevel);
 351         if (texObj->Target == GL_TEXTURE_CUBE_MAP)
 352                 numfaces = 6;
 353
 354         firstImage = texObj->Image[0][firstLevel];
 355         compressed = firstImage->IsCompressed ? firstImage->TexFormat->MesaFormat : 0;
 356
 357         return (mt->firstLevel == firstLevel &&
 358                 mt->lastLevel == lastLevel &&
 359                 mt->width0 == firstImage->Width &&
 360                 mt->height0 == firstImage->Height &&
 361                 mt->depth0 == firstImage->Depth &&
 362                 mt->compressed == compressed &&
 363                 (!mt->compressed ? (mt->bpp == firstImage->TexFormat->TexelBytes) : 1));
 364 }
 365
 366
 367 /**
 368  * Try to allocate a mipmap tree for the given texture that will fit the
 369  * given image in the given position.
 370  */
 371 void radeon_try_alloc_miptree(radeonContextPtr rmesa, radeonTexObj *t,
 372                 struct gl_texture_image *texImage, GLuint face, GLuint level)
 373 {
 374         GLuint compressed = texImage->IsCompressed ? texImage->TexFormat->MesaFormat : 0;
 375         GLuint numfaces = 1;
 376         GLuint firstLevel, lastLevel;
 377
 378         assert(!t->mt);
 379
 380         calculate_first_last_level(&t->base, &firstLevel, &lastLevel, face, level);
 381         if (t->base.Target == GL_TEXTURE_CUBE_MAP)
 382                 numfaces = 6;
 383
 384         if (level != firstLevel || face >= numfaces)
 385                 return;
 386
 387         t->mt = radeon_miptree_create(rmesa, t, t->base.Target,
 388                 firstLevel, lastLevel,
 389                 texImage->Width, texImage->Height, texImage->Depth,
 390                 texImage->TexFormat->TexelBytes, t->tile_bits, compressed);
 391 }
 392
 393 /* Although we use the image_offset[] array to store relative offsets
 394  * to cube faces, Mesa doesn't know anything about this and expects
 395  * each cube face to be treated as a separate image.
 396  *
 397  * These functions present that view to mesa:
 398  */
 399 void
 400 radeon_miptree_depth_offsets(radeon_mipmap_tree *mt, GLuint level, GLuint *offsets)
 401 {
 402      if (mt->target != GL_TEXTURE_3D || mt->faces == 1)
 403         offsets[0] = 0;
 404      else {
 405         int i;
 406         for (i = 0; i < 6; i++)
 407                 offsets[i] = mt->levels[level].faces[i].offset;
 408      }
 409 }
 410
 411 GLuint
 412 radeon_miptree_image_offset(radeon_mipmap_tree *mt,
 413                             GLuint face, GLuint level)
 414 {
 415    if (mt->target == GL_TEXTURE_CUBE_MAP_ARB)
 416       return (mt->levels[level].faces[face].offset);
 417    else
 418       return mt->levels[level].faces[0].offset;
 419 }