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(radeon_mipmap_tree *mt,
  90         GLuint face, GLuint level, GLuint* curOffset)
  91 {
  92         radeon_mipmap_level *lvl = &mt->levels[level];
  93
  94         /* Find image size in bytes */
  95         if (mt->compressed) {
  96                 /* TODO: Is this correct? Need test cases for compressed textures! */
  97                 lvl->rowstride = (lvl->width * mt->bpp + 63) & ~63;
  98                 lvl->size = radeon_compressed_texture_size(mt->radeon->glCtx,
  99                                                            lvl->width, lvl->height, lvl->depth, mt->compressed);
 100         } else if (mt->target == GL_TEXTURE_RECTANGLE_NV) {
 101                 lvl->rowstride = (lvl->width * mt->bpp + 63) & ~63;
 102                 lvl->size = lvl->rowstride * lvl->height;
 103         } else if (mt->tilebits & RADEON_TXO_MICRO_TILE) {
 104                 /* tile pattern is 16 bytes x2. mipmaps stay 32 byte aligned,
 105                  * though the actual offset may be different (if texture is less than
 106                  * 32 bytes width) to the untiled case */
 107                 lvl->rowstride = (lvl->width * mt->bpp * 2 + 31) & ~31;
 108                 lvl->size = lvl->rowstride * ((lvl->height + 1) / 2) * lvl->depth;
 109         } else {
 110                 lvl->rowstride = (lvl->width * mt->bpp + 31) & ~31;
 111                 lvl->size = lvl->rowstride * lvl->height * lvl->depth;
 112         }
 113         assert(lvl->size > 0);
 114
 115         /* All images are aligned to a 32-byte offset */
 116         *curOffset = (*curOffset + 0x1f) & ~0x1f;
 117         lvl->faces[face].offset = *curOffset;
 118         *curOffset += lvl->size;
 119
 120         if (RADEON_DEBUG & DEBUG_TEXTURE)
 121           fprintf(stderr,
 122                   "level %d, face %d: rs:%d %dx%d at %d\n",
 123                   level, face, lvl->rowstride, lvl->width, lvl->height, lvl->faces[face].offset);
 124 }
 125
 126 static GLuint minify(GLuint size, GLuint levels)
 127 {
 128         size = size >> levels;
 129         if (size < 1)
 130                 size = 1;
 131         return size;
 132 }
 133
 134 static void calculate_miptree_layout(radeon_mipmap_tree *mt)
 135 {
 136         GLuint curOffset;
 137         GLuint numLevels;
 138         GLuint i;
 139
 140         numLevels = mt->lastLevel - mt->firstLevel + 1;
 141         assert(numLevels <= RADEON_MAX_TEXTURE_LEVELS);
 142
 143         curOffset = 0;
 144         for(i = 0; i < numLevels; i++) {
 145                 GLuint face;
 146
 147                 mt->levels[i].width = minify(mt->width0, i);
 148                 mt->levels[i].height = minify(mt->height0, i);
 149                 mt->levels[i].depth = minify(mt->depth0, i);
 150
 151                 for(face = 0; face < mt->faces; face++)
 152                         compute_tex_image_offset(mt, face, i, &curOffset);
 153         }
 154
 155         /* Note the required size in memory */
 156         mt->totalsize = (curOffset + RADEON_OFFSET_MASK) & ~RADEON_OFFSET_MASK;
 157 }
 158
 159
 160 /**
 161  * Create a new mipmap tree, calculate its layout and allocate memory.
 162  */
 163 radeon_mipmap_tree* radeon_miptree_create(radeonContextPtr rmesa, radeonTexObj *t,
 164                 GLenum target, GLuint firstLevel, GLuint lastLevel,
 165                 GLuint width0, GLuint height0, GLuint depth0,
 166                 GLuint bpp, GLuint tilebits, GLuint compressed)
 167 {
 168         radeon_mipmap_tree *mt = CALLOC_STRUCT(_radeon_mipmap_tree);
 169
 170         mt->radeon = rmesa;
 171         mt->refcount = 1;
 172         mt->t = t;
 173         mt->target = target;
 174         mt->faces = (target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 175         mt->firstLevel = firstLevel;
 176         mt->lastLevel = lastLevel;
 177         mt->width0 = width0;
 178         mt->height0 = height0;
 179         mt->depth0 = depth0;
 180         mt->bpp = compressed ? radeon_compressed_num_bytes(compressed) : bpp;
 181         mt->tilebits = tilebits;
 182         mt->compressed = compressed;
 183
 184         calculate_miptree_layout(mt);
 185
 186         mt->bo = radeon_bo_open(rmesa->radeonScreen->bom,
 187                             0, mt->totalsize, 1024,
 188                             RADEON_GEM_DOMAIN_VRAM,
 189                             0);
 190
 191         return mt;
 192 }
 193
 194 void radeon_miptree_reference(radeon_mipmap_tree *mt)
 195 {
 196         mt->refcount++;
 197         assert(mt->refcount > 0);
 198 }
 199
 200 void radeon_miptree_unreference(radeon_mipmap_tree *mt)
 201 {
 202         if (!mt)
 203                 return;
 204
 205         assert(mt->refcount > 0);
 206         mt->refcount--;
 207         if (!mt->refcount) {
 208                 radeon_bo_unref(mt->bo);
 209                 free(mt);
 210         }
 211 }
 212
 213
 214 /**
 215  * Calculate first and last mip levels for the given texture object,
 216  * where the dimensions are taken from the given texture image at
 217  * the given level.
 218  *
 219  * Note: level is the OpenGL level number, which is not necessarily the same
 220  * as the first level that is actually present.
 221  *
 222  * The base level image of the given texture face must be non-null,
 223  * or this will fail.
 224  */
 225 static void calculate_first_last_level(struct gl_texture_object *tObj,
 226                                        GLuint *pfirstLevel, GLuint *plastLevel,
 227                                        GLuint face, GLuint level)
 228 {
 229         const struct gl_texture_image * const baseImage =
 230                 tObj->Image[face][level];
 231
 232         assert(baseImage);
 233
 234         /* These must be signed values.  MinLod and MaxLod can be negative numbers,
 235         * and having firstLevel and lastLevel as signed prevents the need for
 236         * extra sign checks.
 237         */
 238         int   firstLevel;
 239         int   lastLevel;
 240
 241         /* Yes, this looks overly complicated, but it's all needed.
 242         */
 243         switch (tObj->Target) {
 244         case GL_TEXTURE_1D:
 245         case GL_TEXTURE_2D:
 246         case GL_TEXTURE_3D:
 247         case GL_TEXTURE_CUBE_MAP:
 248                 if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
 249                         /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
 250                         */
 251                         firstLevel = lastLevel = tObj->BaseLevel;
 252                 } else {
 253                         firstLevel = tObj->BaseLevel + (GLint)(tObj->MinLod + 0.5);
 254                         firstLevel = MAX2(firstLevel, tObj->BaseLevel);
 255                         firstLevel = MIN2(firstLevel, level + baseImage->MaxLog2);
 256                         lastLevel = tObj->BaseLevel + (GLint)(tObj->MaxLod + 0.5);
 257                         lastLevel = MAX2(lastLevel, tObj->BaseLevel);
 258                         lastLevel = MIN2(lastLevel, level + baseImage->MaxLog2);
 259                         lastLevel = MIN2(lastLevel, tObj->MaxLevel);
 260                         lastLevel = MAX2(firstLevel, lastLevel); /* need at least one level */
 261                 }
 262                 break;
 263         case GL_TEXTURE_RECTANGLE_NV:
 264         case GL_TEXTURE_4D_SGIS:
 265                 firstLevel = lastLevel = 0;
 266                 break;
 267         default:
 268                 return;
 269         }
 270
 271         /* save these values */
 272         *pfirstLevel = firstLevel;
 273         *plastLevel = lastLevel;
 274 }
 275
 276
 277 /**
 278  * Checks whether the given miptree can hold the given texture image at the
 279  * given face and level.
 280  */
 281 GLboolean radeon_miptree_matches_image(radeon_mipmap_tree *mt,
 282                 struct gl_texture_image *texImage, GLuint face, GLuint level)
 283 {
 284         radeon_mipmap_level *lvl;
 285
 286         if (face >= mt->faces || level < mt->firstLevel || level > mt->lastLevel)
 287                 return GL_FALSE;
 288
 289         if (texImage->IsCompressed != mt->compressed)
 290                 return GL_FALSE;
 291
 292         if (!texImage->IsCompressed &&
 293             !mt->compressed &&
 294             texImage->TexFormat->TexelBytes != mt->bpp)
 295                 return GL_FALSE;
 296
 297         lvl = &mt->levels[level - mt->firstLevel];
 298         if (lvl->width != texImage->Width ||
 299             lvl->height != texImage->Height ||
 300             lvl->depth != texImage->Depth)
 301                 return GL_FALSE;
 302
 303         return GL_TRUE;
 304 }
 305
 306
 307 /**
 308  * Checks whether the given miptree has the right format to store the given texture object.
 309  */
 310 GLboolean radeon_miptree_matches_texture(radeon_mipmap_tree *mt, struct gl_texture_object *texObj)
 311 {
 312         struct gl_texture_image *firstImage;
 313         GLuint compressed;
 314         GLuint numfaces = 1;
 315         GLuint firstLevel, lastLevel;
 316
 317         calculate_first_last_level(texObj, &firstLevel, &lastLevel, 0, texObj->BaseLevel);
 318         if (texObj->Target == GL_TEXTURE_CUBE_MAP)
 319                 numfaces = 6;
 320
 321         firstImage = texObj->Image[0][firstLevel];
 322         compressed = firstImage->IsCompressed ? firstImage->TexFormat->MesaFormat : 0;
 323
 324         return (mt->firstLevel == firstLevel &&
 325                 mt->lastLevel == lastLevel &&
 326                 mt->width0 == firstImage->Width &&
 327                 mt->height0 == firstImage->Height &&
 328                 mt->depth0 == firstImage->Depth &&
 329                 mt->bpp == firstImage->TexFormat->TexelBytes &&
 330                 mt->compressed == compressed);
 331 }
 332
 333
 334 /**
 335  * Try to allocate a mipmap tree for the given texture that will fit the
 336  * given image in the given position.
 337  */
 338 void radeon_try_alloc_miptree(radeonContextPtr rmesa, radeonTexObj *t,
 339                 struct gl_texture_image *texImage, GLuint face, GLuint level)
 340 {
 341         GLuint compressed = texImage->IsCompressed ? texImage->TexFormat->MesaFormat : 0;
 342         GLuint numfaces = 1;
 343         GLuint firstLevel, lastLevel;
 344
 345         assert(!t->mt);
 346
 347         calculate_first_last_level(&t->base, &firstLevel, &lastLevel, face, level);
 348         if (t->base.Target == GL_TEXTURE_CUBE_MAP)
 349                 numfaces = 6;
 350
 351         if (level != firstLevel || face >= numfaces)
 352                 return;
 353
 354         t->mt = radeon_miptree_create(rmesa, t, t->base.Target,
 355                 firstLevel, lastLevel,
 356                 texImage->Width, texImage->Height, texImage->Depth,
 357                 texImage->TexFormat->TexelBytes, t->tile_bits, compressed);
 358 }
 359
 360 /* Although we use the image_offset[] array to store relative offsets
 361  * to cube faces, Mesa doesn't know anything about this and expects
 362  * each cube face to be treated as a separate image.
 363  *
 364  * These functions present that view to mesa:
 365  */
 366 void
 367 radeon_miptree_depth_offsets(radeon_mipmap_tree *mt, GLuint level, GLuint *offsets)
 368 {
 369      if (mt->target != GL_TEXTURE_3D || mt->faces == 1)
 370         offsets[0] = 0;
 371      else {
 372         int i;
 373         for (i = 0; i < 6; i++)
 374                 offsets[i] = mt->levels[level].faces[i].offset;
 375      }
 376 }
 377
 378 GLuint
 379 radeon_miptree_image_offset(radeon_mipmap_tree *mt,
 380                             GLuint face, GLuint level)
 381 {
 382    if (mt->target == GL_TEXTURE_CUBE_MAP_ARB)
 383       return (mt->levels[level].faces[face].offset);
 384    else
 385       return mt->levels[level].faces[0].offset;
 386 }