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  * Compute sizes and fill in offset and blit information for the given
  61  * image (determined by \p face and \p level).
  62  *
  63  * \param curOffset points to the offset at which the image is to be stored
  64  * and is updated by this function according to the size of the image.
  65  */
  66 static void compute_tex_image_offset(radeon_mipmap_tree *mt,
  67         GLuint face, GLuint level, GLuint* curOffset)
  68 {
  69         radeon_mipmap_level *lvl = &mt->levels[level];
  70
  71         /* Find image size in bytes */
  72         if (mt->compressed) {
  73                 /* TODO: Is this correct? Need test cases for compressed textures! */
  74                 GLuint align;
  75
  76                 if (mt->target == GL_TEXTURE_RECTANGLE_NV)
  77                         align = 64 / mt->bpp;
  78                 else
  79                         align = 32 / mt->bpp;
  80                 lvl->rowstride = (lvl->width + align - 1) & ~(align - 1);
  81                 lvl->size = radeon_compressed_texture_size(mt->radeon->glCtx,
  82                         lvl->width, lvl->height, lvl->depth, mt->compressed);
  83         } else if (mt->target == GL_TEXTURE_RECTANGLE_NV) {
  84                 lvl->rowstride = (lvl->width * mt->bpp + 63) & ~63;
  85                 lvl->size = lvl->rowstride * lvl->height;
  86         } else if (mt->tilebits & RADEON_TXO_MICRO_TILE) {
  87           /* tile pattern is 16 bytes x2. mipmaps stay 32 byte aligned,
  88                  * though the actual offset may be different (if texture is less than
  89                  * 32 bytes width) to the untiled case */
  90                 lvl->rowstride = (lvl->width * mt->bpp * 2 + 31) & ~31;
  91                 lvl->size = lvl->rowstride * ((lvl->height + 1) / 2) * lvl->depth;
  92         } else {
  93                 lvl->rowstride = (lvl->width * mt->bpp + 31) & ~31;
  94                 lvl->size = lvl->rowstride * lvl->height * lvl->depth;
  95         }
  96         assert(lvl->size > 0);
  97
  98         /* All images are aligned to a 32-byte offset */
  99         *curOffset = (*curOffset + 0x1f) & ~0x1f;
 100         lvl->faces[face].offset = *curOffset;
 101         *curOffset += lvl->size;
 102
 103         if (RADEON_DEBUG & DEBUG_TEXTURE)
 104           fprintf(stderr,
 105                   "level %d, face %d: rs:%d %dx%d at %d\n",
 106                   level, face, lvl->rowstride, lvl->width, lvl->height, lvl->faces[face].offset);
 107 }
 108
 109 static GLuint minify(GLuint size, GLuint levels)
 110 {
 111         size = size >> levels;
 112         if (size < 1)
 113                 size = 1;
 114         return size;
 115 }
 116
 117 static void calculate_miptree_layout(radeon_mipmap_tree *mt)
 118 {
 119         GLuint curOffset;
 120         GLuint numLevels;
 121         GLuint i;
 122
 123         numLevels = mt->lastLevel - mt->firstLevel + 1;
 124         assert(numLevels <= RADEON_MAX_TEXTURE_LEVELS);
 125
 126         curOffset = 0;
 127         for(i = 0; i < numLevels; i++) {
 128                 GLuint face;
 129
 130                 mt->levels[i].width = minify(mt->width0, i);
 131                 mt->levels[i].height = minify(mt->height0, i);
 132                 mt->levels[i].depth = minify(mt->depth0, i);
 133
 134                 for(face = 0; face < mt->faces; face++)
 135                         compute_tex_image_offset(mt, face, i, &curOffset);
 136         }
 137
 138         /* Note the required size in memory */
 139         mt->totalsize = (curOffset + RADEON_OFFSET_MASK) & ~RADEON_OFFSET_MASK;
 140 }
 141
 142
 143 /**
 144  * Create a new mipmap tree, calculate its layout and allocate memory.
 145  */
 146 radeon_mipmap_tree* radeon_miptree_create(radeonContextPtr rmesa, radeonTexObj *t,
 147                 GLenum target, GLuint firstLevel, GLuint lastLevel,
 148                 GLuint width0, GLuint height0, GLuint depth0,
 149                 GLuint bpp, GLuint tilebits, GLuint compressed)
 150 {
 151         radeon_mipmap_tree *mt = CALLOC_STRUCT(_radeon_mipmap_tree);
 152
 153         mt->radeon = rmesa;
 154         mt->refcount = 1;
 155         mt->t = t;
 156         mt->target = target;
 157         mt->faces = (target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 158         mt->firstLevel = firstLevel;
 159         mt->lastLevel = lastLevel;
 160         mt->width0 = width0;
 161         mt->height0 = height0;
 162         mt->depth0 = depth0;
 163         mt->bpp = bpp;
 164         mt->tilebits = tilebits;
 165         mt->compressed = compressed;
 166
 167         calculate_miptree_layout(mt);
 168
 169         mt->bo = radeon_bo_open(rmesa->radeonScreen->bom,
 170                             0, mt->totalsize, 1024,
 171                             RADEON_GEM_DOMAIN_VRAM,
 172                             0);
 173
 174         return mt;
 175 }
 176
 177 void radeon_miptree_reference(radeon_mipmap_tree *mt)
 178 {
 179         mt->refcount++;
 180         assert(mt->refcount > 0);
 181 }
 182
 183 void radeon_miptree_unreference(radeon_mipmap_tree *mt)
 184 {
 185         if (!mt)
 186                 return;
 187
 188         assert(mt->refcount > 0);
 189         mt->refcount--;
 190         if (!mt->refcount) {
 191                 radeon_bo_unref(mt->bo);
 192                 free(mt);
 193         }
 194 }
 195
 196
 197 static void calculate_first_last_level(struct gl_texture_object *tObj,
 198                                        GLuint *pfirstLevel, GLuint *plastLevel)
 199 {
 200         const struct gl_texture_image * const baseImage =
 201                 tObj->Image[0][tObj->BaseLevel];
 202
 203         /* These must be signed values.  MinLod and MaxLod can be negative numbers,
 204         * and having firstLevel and lastLevel as signed prevents the need for
 205         * extra sign checks.
 206         */
 207         int   firstLevel;
 208         int   lastLevel;
 209
 210         /* Yes, this looks overly complicated, but it's all needed.
 211         */
 212         switch (tObj->Target) {
 213         case GL_TEXTURE_1D:
 214         case GL_TEXTURE_2D:
 215         case GL_TEXTURE_3D:
 216         case GL_TEXTURE_CUBE_MAP:
 217                 if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
 218                         /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
 219                         */
 220                         firstLevel = lastLevel = tObj->BaseLevel;
 221                 } else {
 222                         firstLevel = tObj->BaseLevel + (GLint)(tObj->MinLod + 0.5);
 223                         firstLevel = MAX2(firstLevel, tObj->BaseLevel);
 224                         firstLevel = MIN2(firstLevel, tObj->BaseLevel + baseImage->MaxLog2);
 225                         lastLevel = tObj->BaseLevel + (GLint)(tObj->MaxLod + 0.5);
 226                         lastLevel = MAX2(lastLevel, tObj->BaseLevel);
 227                         lastLevel = MIN2(lastLevel, tObj->BaseLevel + baseImage->MaxLog2);
 228                         lastLevel = MIN2(lastLevel, tObj->MaxLevel);
 229                         lastLevel = MAX2(firstLevel, lastLevel); /* need at least one level */
 230                 }
 231                 break;
 232         case GL_TEXTURE_RECTANGLE_NV:
 233         case GL_TEXTURE_4D_SGIS:
 234                 firstLevel = lastLevel = 0;
 235                 break;
 236         default:
 237                 return;
 238         }
 239
 240         /* save these values */
 241         *pfirstLevel = firstLevel;
 242         *plastLevel = lastLevel;
 243 }
 244
 245
 246 /**
 247  * Checks whether the given miptree can hold the given texture image at the
 248  * given face and level.
 249  */
 250 GLboolean radeon_miptree_matches_image(radeon_mipmap_tree *mt,
 251                 struct gl_texture_image *texImage, GLuint face, GLuint level)
 252 {
 253         radeon_mipmap_level *lvl;
 254
 255         if (face >= mt->faces || level < mt->firstLevel || level > mt->lastLevel)
 256                 return GL_FALSE;
 257
 258         if (texImage->TexFormat->TexelBytes != mt->bpp)
 259                 return GL_FALSE;
 260
 261         lvl = &mt->levels[level - mt->firstLevel];
 262         if (lvl->width != texImage->Width ||
 263             lvl->height != texImage->Height ||
 264             lvl->depth != texImage->Depth)
 265                 return GL_FALSE;
 266
 267         return GL_TRUE;
 268 }
 269
 270
 271 /**
 272  * Checks whether the given miptree has the right format to store the given texture object.
 273  */
 274 GLboolean radeon_miptree_matches_texture(radeon_mipmap_tree *mt, struct gl_texture_object *texObj)
 275 {
 276         struct gl_texture_image *firstImage;
 277         GLuint compressed;
 278         GLuint numfaces = 1;
 279         GLuint firstLevel, lastLevel;
 280
 281         calculate_first_last_level(texObj, &firstLevel, &lastLevel);
 282         if (texObj->Target == GL_TEXTURE_CUBE_MAP)
 283                 numfaces = 6;
 284
 285         firstImage = texObj->Image[0][firstLevel];
 286         compressed = firstImage->IsCompressed ? firstImage->TexFormat->MesaFormat : 0;
 287
 288         return (mt->firstLevel == firstLevel &&
 289                 mt->lastLevel == lastLevel &&
 290                 mt->width0 == firstImage->Width &&
 291                 mt->height0 == firstImage->Height &&
 292                 mt->depth0 == firstImage->Depth &&
 293                 mt->bpp == firstImage->TexFormat->TexelBytes &&
 294                 mt->compressed == compressed);
 295 }
 296
 297
 298 /**
 299  * Try to allocate a mipmap tree for the given texture that will fit the
 300  * given image in the given position.
 301  */
 302 void radeon_try_alloc_miptree(radeonContextPtr rmesa, radeonTexObj *t,
 303                 struct gl_texture_image *texImage, GLuint face, GLuint level)
 304 {
 305         GLuint compressed = texImage->IsCompressed ? texImage->TexFormat->MesaFormat : 0;
 306         GLuint numfaces = 1;
 307         GLuint firstLevel, lastLevel;
 308
 309         assert(!t->mt);
 310
 311         calculate_first_last_level(&t->base, &firstLevel, &lastLevel);
 312         if (t->base.Target == GL_TEXTURE_CUBE_MAP)
 313                 numfaces = 6;
 314
 315         if (level != firstLevel || face >= numfaces)
 316                 return;
 317
 318         t->mt = radeon_miptree_create(rmesa, t, t->base.Target,
 319                 firstLevel, lastLevel,
 320                 texImage->Width, texImage->Height, texImage->Depth,
 321                 texImage->TexFormat->TexelBytes, t->tile_bits, compressed);
 322 }