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