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 #include "radeon_buffer.h"
  38
  39 static GLuint radeon_compressed_texture_size(GLcontext *ctx,
  40                 GLsizei width, GLsizei height, GLsizei depth,
  41                 GLuint mesaFormat)
  42 {
  43         GLuint size = _mesa_compressed_texture_size(ctx, width, height, depth, mesaFormat);
  44
  45         if (mesaFormat == MESA_FORMAT_RGB_DXT1 ||
  46             mesaFormat == MESA_FORMAT_RGBA_DXT1) {
  47                 if (width + 3 < 8)      /* width one block */
  48                         size = size * 4;
  49                 else if (width + 3 < 16)
  50                         size = size * 2;
  51         } else {
  52                 /* DXT3/5, 16 bytes per block */
  53           //            WARN_ONCE("DXT 3/5 suffers from multitexturing problems!\n");
  54                 if (width + 3 < 8)
  55                         size = size * 2;
  56         }
  57
  58         return size;
  59 }
  60
  61 /**
  62  * Compute sizes and fill in offset and blit information for the given
  63  * image (determined by \p face and \p level).
  64  *
  65  * \param curOffset points to the offset at which the image is to be stored
  66  * and is updated by this function according to the size of the image.
  67  */
  68 static void compute_tex_image_offset(radeon_mipmap_tree *mt,
  69         GLuint face, GLuint level, GLuint* curOffset)
  70 {
  71         radeon_mipmap_level *lvl = &mt->levels[level];
  72
  73         /* Find image size in bytes */
  74         if (mt->compressed) {
  75                 /* TODO: Is this correct? Need test cases for compressed textures! */
  76                 GLuint align;
  77
  78                 if (mt->target == GL_TEXTURE_RECTANGLE_NV)
  79                         align = 64 / mt->bpp;
  80                 else
  81                         align = 32 / mt->bpp;
  82                 lvl->rowstride = (lvl->width + align - 1) & ~(align - 1);
  83                 lvl->size = radeon_compressed_texture_size(mt->radeon->glCtx,
  84                         lvl->width, lvl->height, lvl->depth, mt->compressed);
  85         } else if (mt->target == GL_TEXTURE_RECTANGLE_NV) {
  86                 lvl->rowstride = (lvl->width * mt->bpp + 63) & ~63;
  87                 lvl->size = lvl->rowstride * lvl->height;
  88         } else if (mt->tilebits & RADEON_TXO_MICRO_TILE) {
  89           /* tile pattern is 16 bytes x2. mipmaps stay 32 byte aligned,
  90                  * though the actual offset may be different (if texture is less than
  91                  * 32 bytes width) to the untiled case */
  92                 lvl->rowstride = (lvl->width * mt->bpp * 2 + 31) & ~31;
  93                 lvl->size = lvl->rowstride * ((lvl->height + 1) / 2) * lvl->depth;
  94         } else {
  95                 lvl->rowstride = (lvl->width * mt->bpp + 31) & ~31;
  96                 lvl->size = lvl->rowstride * lvl->height * lvl->depth;
  97         }
  98         assert(lvl->size > 0);
  99
 100         /* All images are aligned to a 32-byte offset */
 101         *curOffset = (*curOffset + 0x1f) & ~0x1f;
 102         lvl->faces[face].offset = *curOffset;
 103         *curOffset += lvl->size;
 104 }
 105
 106 static GLuint minify(GLuint size, GLuint levels)
 107 {
 108         size = size >> levels;
 109         if (size < 1)
 110                 size = 1;
 111         return size;
 112 }
 113
 114 static void calculate_miptree_layout(radeon_mipmap_tree *mt)
 115 {
 116         GLuint curOffset;
 117         GLuint numLevels;
 118         GLuint i;
 119
 120         numLevels = mt->lastLevel - mt->firstLevel + 1;
 121         assert(numLevels <= RADEON_MAX_TEXTURE_LEVELS);
 122
 123         curOffset = 0;
 124         for(i = 0; i < numLevels; i++) {
 125                 GLuint face;
 126
 127                 mt->levels[i].width = minify(mt->width0, i);
 128                 mt->levels[i].height = minify(mt->height0, i);
 129                 mt->levels[i].depth = minify(mt->depth0, i);
 130
 131                 for(face = 0; face < mt->faces; face++)
 132                         compute_tex_image_offset(mt, face, i, &curOffset);
 133         }
 134
 135         /* Note the required size in memory */
 136         mt->totalsize = (curOffset + RADEON_OFFSET_MASK) & ~RADEON_OFFSET_MASK;
 137 }
 138
 139
 140 /**
 141  * Create a new mipmap tree, calculate its layout and allocate memory.
 142  */
 143 radeon_mipmap_tree* radeon_miptree_create(radeonContextPtr rmesa, radeonTexObj *t,
 144                 GLenum target, GLuint firstLevel, GLuint lastLevel,
 145                 GLuint width0, GLuint height0, GLuint depth0,
 146                 GLuint bpp, GLuint tilebits, GLuint compressed)
 147 {
 148         radeon_mipmap_tree *mt = CALLOC_STRUCT(_radeon_mipmap_tree);
 149
 150         mt->radeon = rmesa;
 151         mt->refcount = 1;
 152         mt->t = t;
 153         mt->target = target;
 154         mt->faces = (target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 155         mt->firstLevel = firstLevel;
 156         mt->lastLevel = lastLevel;
 157         mt->width0 = width0;
 158         mt->height0 = height0;
 159         mt->depth0 = depth0;
 160         mt->bpp = bpp;
 161         mt->tilebits = tilebits;
 162         mt->compressed = compressed;
 163
 164         calculate_miptree_layout(mt);
 165
 166         mt->bo = radeon_bo_open(rmesa->radeonScreen->bom,
 167                             0, mt->totalsize, 1024,
 168                             RADEON_GEM_DOMAIN_VRAM,
 169                             0);
 170
 171         return mt;
 172 }
 173
 174 void radeon_miptree_reference(radeon_mipmap_tree *mt)
 175 {
 176         mt->refcount++;
 177         assert(mt->refcount > 0);
 178 }
 179
 180 void radeon_miptree_unreference(radeon_mipmap_tree *mt)
 181 {
 182         if (!mt)
 183                 return;
 184
 185         assert(mt->refcount > 0);
 186         mt->refcount--;
 187         if (!mt->refcount) {
 188                 radeon_bo_unref(mt->bo);
 189                 free(mt);
 190         }
 191 }
 192
 193
 194 static void calculate_first_last_level(struct gl_texture_object *tObj,
 195                                        GLuint *pfirstLevel, GLuint *plastLevel)
 196 {
 197         const struct gl_texture_image * const baseImage =
 198                 tObj->Image[0][tObj->BaseLevel];
 199
 200         /* These must be signed values.  MinLod and MaxLod can be negative numbers,
 201         * and having firstLevel and lastLevel as signed prevents the need for
 202         * extra sign checks.
 203         */
 204         int   firstLevel;
 205         int   lastLevel;
 206
 207         /* Yes, this looks overly complicated, but it's all needed.
 208         */
 209         switch (tObj->Target) {
 210         case GL_TEXTURE_1D:
 211         case GL_TEXTURE_2D:
 212         case GL_TEXTURE_3D:
 213         case GL_TEXTURE_CUBE_MAP:
 214                 if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
 215                         /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
 216                         */
 217                         firstLevel = lastLevel = tObj->BaseLevel;
 218                 } else {
 219                         firstLevel = tObj->BaseLevel + (GLint)(tObj->MinLod + 0.5);
 220                         firstLevel = MAX2(firstLevel, tObj->BaseLevel);
 221                         firstLevel = MIN2(firstLevel, tObj->BaseLevel + baseImage->MaxLog2);
 222                         lastLevel = tObj->BaseLevel + (GLint)(tObj->MaxLod + 0.5);
 223                         lastLevel = MAX2(lastLevel, tObj->BaseLevel);
 224                         lastLevel = MIN2(lastLevel, tObj->BaseLevel + baseImage->MaxLog2);
 225                         lastLevel = MIN2(lastLevel, tObj->MaxLevel);
 226                         lastLevel = MAX2(firstLevel, lastLevel); /* need at least one level */
 227                 }
 228                 break;
 229         case GL_TEXTURE_RECTANGLE_NV:
 230         case GL_TEXTURE_4D_SGIS:
 231                 firstLevel = lastLevel = 0;
 232                 break;
 233         default:
 234                 return;
 235         }
 236
 237         /* save these values */
 238         *pfirstLevel = firstLevel;
 239         *plastLevel = lastLevel;
 240 }
 241
 242
 243 /**
 244  * Checks whether the given miptree can hold the given texture image at the
 245  * given face and level.
 246  */
 247 GLboolean radeon_miptree_matches_image(radeon_mipmap_tree *mt,
 248                 struct gl_texture_image *texImage, GLuint face, GLuint level)
 249 {
 250         radeon_mipmap_level *lvl;
 251
 252         if (face >= mt->faces || level < mt->firstLevel || level > mt->lastLevel)
 253                 return GL_FALSE;
 254
 255         if (texImage->TexFormat->TexelBytes != mt->bpp)
 256                 return GL_FALSE;
 257
 258         lvl = &mt->levels[level - mt->firstLevel];
 259         if (lvl->width != texImage->Width ||
 260             lvl->height != texImage->Height ||
 261             lvl->depth != texImage->Depth)
 262                 return GL_FALSE;
 263
 264         return GL_TRUE;
 265 }
 266
 267
 268 /**
 269  * Checks whether the given miptree has the right format to store the given texture object.
 270  */
 271 GLboolean radeon_miptree_matches_texture(radeon_mipmap_tree *mt, struct gl_texture_object *texObj)
 272 {
 273         struct gl_texture_image *firstImage;
 274         GLuint compressed;
 275         GLuint numfaces = 1;
 276         GLuint firstLevel, lastLevel;
 277
 278         calculate_first_last_level(texObj, &firstLevel, &lastLevel);
 279         if (texObj->Target == GL_TEXTURE_CUBE_MAP)
 280                 numfaces = 6;
 281
 282         firstImage = texObj->Image[0][firstLevel];
 283         compressed = firstImage->IsCompressed ? firstImage->TexFormat->MesaFormat : 0;
 284
 285         return (mt->firstLevel == firstLevel &&
 286                 mt->lastLevel == lastLevel &&
 287                 mt->width0 == firstImage->Width &&
 288                 mt->height0 == firstImage->Height &&
 289                 mt->depth0 == firstImage->Depth &&
 290                 mt->bpp == firstImage->TexFormat->TexelBytes &&
 291                 mt->compressed == compressed);
 292 }
 293
 294
 295 /**
 296  * Try to allocate a mipmap tree for the given texture that will fit the
 297  * given image in the given position.
 298  */
 299 void radeon_try_alloc_miptree(radeonContextPtr rmesa, radeonTexObj *t,
 300                 struct gl_texture_image *texImage, GLuint face, GLuint level)
 301 {
 302         GLuint compressed = texImage->IsCompressed ? texImage->TexFormat->MesaFormat : 0;
 303         GLuint numfaces = 1;
 304         GLuint firstLevel, lastLevel;
 305
 306         assert(!t->mt);
 307
 308         calculate_first_last_level(&t->base, &firstLevel, &lastLevel);
 309         if (t->base.Target == GL_TEXTURE_CUBE_MAP)
 310                 numfaces = 6;
 311
 312         if (level != firstLevel || face >= numfaces)
 313                 return;
 314
 315         t->mt = radeon_miptree_create(rmesa, t, t->base.Target,
 316                 firstLevel, lastLevel,
 317                 texImage->Width, texImage->Height, texImage->Depth,
 318                 texImage->TexFormat->TexelBytes, t->tile_bits, compressed);
 319 }