src/mesa/state_tracker/st_mipmap_tree.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * 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, sub license, 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 portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "st_mipmap_tree.h"
  29 #include "enums.h"
  30
  31 #include "pipe/p_state.h"
  32 #include "pipe/p_context.h"
  33 #include "pipe/p_defines.h"
  34
  35
  36 #define DBG if(0) printf
  37
  38 #if 0
  39 static GLenum
  40 target_to_target(GLenum target)
  41 {
  42    switch (target) {
  43    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
  44    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
  45    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
  46    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
  47    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
  48    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
  49       return GL_TEXTURE_CUBE_MAP_ARB;
  50    default:
  51       return target;
  52    }
  53 }
  54 #endif
  55
  56 struct pipe_mipmap_tree *
  57 st_miptree_create(struct pipe_context *pipe,
  58                   unsigned target,
  59                      GLenum internal_format,
  60                      GLuint first_level,
  61                      GLuint last_level,
  62                      GLuint width0,
  63                      GLuint height0,
  64                      GLuint depth0, GLuint cpp, GLuint compress_byte)
  65 {
  66    GLboolean ok;
  67    struct pipe_mipmap_tree *mt = calloc(sizeof(*mt), 1);
  68    GLbitfield flags = 0x0;
  69
  70    assert(target <= PIPE_TEXTURE_CUBE);
  71
  72    DBG("%s target %s format %s level %d..%d\n", __FUNCTION__,
  73        _mesa_lookup_enum_by_nr(target),
  74        _mesa_lookup_enum_by_nr(internal_format), first_level, last_level);
  75
  76    mt->target = target;
  77    mt->internal_format = internal_format;
  78    mt->first_level = first_level;
  79    mt->last_level = last_level;
  80    mt->width0 = width0;
  81    mt->height0 = height0;
  82    mt->depth0 = depth0;
  83    mt->cpp = compress_byte ? compress_byte : cpp;
  84    mt->compressed = compress_byte ? 1 : 0;
  85    mt->refcount = 1;
  86
  87    ok = pipe->mipmap_tree_layout(pipe, mt);
  88    if (ok) {
  89       /* note: it's OK to pass 'pitch' as 'width' here: */
  90       mt->region = pipe->region_alloc(pipe, mt->cpp, mt->pitch,
  91                                       mt->total_height, flags);
  92    }
  93
  94    if (!mt->region) {
  95       free(mt);
  96       return NULL;
  97    }
  98
  99    return mt;
 100 }
 101
 102
 103 void
 104 st_miptree_reference(struct pipe_mipmap_tree **dst,
 105                         struct pipe_mipmap_tree *src)
 106 {
 107    src->refcount++;
 108    *dst = src;
 109    DBG("%s %p refcount now %d\n", __FUNCTION__, (void *) src, src->refcount);
 110 }
 111
 112 void
 113 st_miptree_release(struct pipe_context *pipe,
 114                    struct pipe_mipmap_tree **mt)
 115 {
 116    if (!*mt)
 117       return;
 118
 119    DBG("%s %p refcount will be %d\n",
 120        __FUNCTION__, (void *) *mt, (*mt)->refcount - 1);
 121    if (--(*mt)->refcount <= 0) {
 122       GLuint i;
 123
 124       DBG("%s deleting %p\n", __FUNCTION__, (void *) *mt);
 125
 126       pipe->region_release(pipe, &((*mt)->region));
 127
 128       for (i = 0; i < MAX_TEXTURE_LEVELS; i++)
 129          if ((*mt)->level[i].image_offset)
 130             free((*mt)->level[i].image_offset);
 131
 132       free(*mt);
 133    }
 134    *mt = NULL;
 135 }
 136
 137
 138
 139
 140 /* Can the image be pulled into a unified mipmap tree.  This mirrors
 141  * the completeness test in a lot of ways.
 142  *
 143  * Not sure whether I want to pass gl_texture_image here.
 144  */
 145 GLboolean
 146 st_miptree_match_image(struct pipe_mipmap_tree *mt,
 147                           struct gl_texture_image *image,
 148                           GLuint face, GLuint level)
 149 {
 150    /* Images with borders are never pulled into mipmap trees.
 151     */
 152    if (image->Border)
 153       return GL_FALSE;
 154
 155    if (image->InternalFormat != mt->internal_format ||
 156        image->IsCompressed != mt->compressed)
 157       return GL_FALSE;
 158
 159    /* Test image dimensions against the base level image adjusted for
 160     * minification.  This will also catch images not present in the
 161     * tree, changed targets, etc.
 162     */
 163    if (image->Width != mt->level[level].width ||
 164        image->Height != mt->level[level].height ||
 165        image->Depth != mt->level[level].depth)
 166       return GL_FALSE;
 167
 168    return GL_TRUE;
 169 }
 170
 171
 172 /* Although we use the image_offset[] array to store relative offsets
 173  * to cube faces, Mesa doesn't know anything about this and expects
 174  * each cube face to be treated as a separate image.
 175  *
 176  * These functions present that view to mesa:
 177  */
 178 const GLuint *
 179 st_miptree_depth_offsets(struct pipe_mipmap_tree *mt, GLuint level)
 180 {
 181    static const GLuint zero = 0;
 182
 183    if (mt->target != PIPE_TEXTURE_3D || mt->level[level].nr_images == 1)
 184       return &zero;
 185    else
 186       return mt->level[level].image_offset;
 187 }
 188
 189
 190 /**
 191  * Return the offset to the given mipmap texture image within the
 192  * texture memory buffer, in bytes.
 193  */
 194 GLuint
 195 st_miptree_image_offset(const struct pipe_mipmap_tree * mt,
 196                         GLuint face, GLuint level)
 197 {
 198    if (mt->target == PIPE_TEXTURE_CUBE)
 199       return (mt->level[level].level_offset +
 200               mt->level[level].image_offset[face] * mt->cpp);
 201    else
 202       return mt->level[level].level_offset;
 203 }
 204
 205
 206 GLuint
 207 st_miptree_texel_offset(const struct pipe_mipmap_tree * mt,
 208                         GLuint face, GLuint level,
 209                         GLuint col, GLuint row, GLuint img)
 210 {
 211    GLuint imgOffset = st_miptree_image_offset(mt, face, level);
 212
 213    return imgOffset + row * (mt->pitch + col) * mt->cpp;
 214 }
 215
 216
 217
 218 /**
 219  * Map a teximage in a mipmap tree.
 220  * \param row_stride  returns row stride in bytes
 221  * \param image_stride  returns image stride in bytes (for 3D textures).
 222  * \return address of mapping
 223  */
 224 GLubyte *
 225 st_miptree_image_map(struct pipe_context *pipe,
 226                         struct pipe_mipmap_tree * mt,
 227                         GLuint face,
 228                         GLuint level,
 229                         GLuint * row_stride, GLuint * image_offsets)
 230 {
 231    GLubyte *ptr;
 232    DBG("%s \n", __FUNCTION__);
 233
 234    if (row_stride)
 235       *row_stride = mt->pitch * mt->cpp;
 236
 237    if (image_offsets)
 238       memcpy(image_offsets, mt->level[level].image_offset,
 239              mt->level[level].depth * sizeof(GLuint));
 240
 241    ptr = pipe->region_map(pipe, mt->region);
 242
 243    return ptr + st_miptree_image_offset(mt, face, level);
 244 }
 245
 246 void
 247 st_miptree_image_unmap(struct pipe_context *pipe,
 248                           struct pipe_mipmap_tree *mt)
 249 {
 250    DBG("%s\n", __FUNCTION__);
 251    pipe->region_unmap(pipe, mt->region);
 252 }
 253
 254
 255
 256 /* Upload data for a particular image.
 257  */
 258 void
 259 st_miptree_image_data(struct pipe_context *pipe,
 260                       struct pipe_mipmap_tree *dst,
 261                       GLuint face,
 262                       GLuint level,
 263                       void *src,
 264                       GLuint src_row_pitch, GLuint src_image_pitch)
 265 {
 266    GLuint depth = dst->level[level].depth;
 267    GLuint dst_offset = st_miptree_image_offset(dst, face, level);
 268    const GLuint *dst_depth_offset = st_miptree_depth_offsets(dst, level);
 269    GLuint i;
 270    GLuint height = 0;
 271    const GLubyte *srcUB = src;
 272
 273    DBG("%s\n", __FUNCTION__);
 274    for (i = 0; i < depth; i++) {
 275       height = dst->level[level].height;
 276       if(dst->compressed)
 277          height /= 4;
 278       pipe->region_data(pipe, dst->region,
 279                         dst_offset + dst_depth_offset[i], /* dst_offset */
 280                         0, 0,                             /* dstx, dsty */
 281                         srcUB,
 282                         src_row_pitch,
 283                         0, 0,                             /* source x, y */
 284                         dst->level[level].width, height); /* width, height */
 285
 286       srcUB += src_image_pitch * dst->cpp;
 287    }
 288 }
 289
 290 /* Copy mipmap image between trees
 291  */
 292 void
 293 st_miptree_image_copy(struct pipe_context *pipe,
 294                          struct pipe_mipmap_tree *dst,
 295                          GLuint face, GLuint level,
 296                          struct pipe_mipmap_tree *src)
 297 {
 298    GLuint width = src->level[level].width;
 299    GLuint height = src->level[level].height;
 300    GLuint depth = src->level[level].depth;
 301    GLuint dst_offset = st_miptree_image_offset(dst, face, level);
 302    GLuint src_offset = st_miptree_image_offset(src, face, level);
 303    const GLuint *dst_depth_offset = st_miptree_depth_offsets(dst, level);
 304    const GLuint *src_depth_offset = st_miptree_depth_offsets(src, level);
 305    GLuint i;
 306
 307    if (dst->compressed)
 308       height /= 4;
 309    for (i = 0; i < depth; i++) {
 310       pipe->region_copy(pipe,
 311                         dst->region, dst_offset + dst_depth_offset[i],
 312                         0,
 313                         0,
 314                         src->region, src_offset + src_depth_offset[i],
 315                         0, 0, width, height);
 316    }
 317
 318 }