src/mesa/pipe/softpipe/sp_texture.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 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   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   *   Michel Dänzer <michel@tungstengraphics.com>
  31   */
  32
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_inlines.h"
  36 #include "pipe/p_util.h"
  37 #include "pipe/p_winsys.h"
  38
  39 #include "sp_context.h"
  40 #include "sp_state.h"
  41 #include "sp_texture.h"
  42
  43
  44 /* Simple, maximally packed layout.
  45  */
  46
  47 static unsigned minify( unsigned d )
  48 {
  49    return MAX2(1, d>>1);
  50 }
  51
  52
  53 static void
  54 softpipe_texture_layout(struct softpipe_texture * spt)
  55 {
  56    struct pipe_texture *pt = &spt->base;
  57    unsigned level;
  58    unsigned width = pt->width[0];
  59    unsigned height = pt->height[0];
  60    unsigned depth = pt->depth[0];
  61
  62    spt->buffer_size = 0;
  63
  64    for (level = 0; level <= pt->last_level; level++) {
  65       pt->width[level] = width;
  66       pt->height[level] = height;
  67       pt->depth[level] = depth;
  68
  69       spt->level_offset[level] = spt->buffer_size;
  70
  71       spt->buffer_size += ((pt->compressed) ? MAX2(1, height/4) : height) *
  72                           ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  73                           width * pt->cpp;
  74
  75       width  = minify(width);
  76       height = minify(height);
  77       depth = minify(depth);
  78    }
  79 }
  80
  81
  82 struct pipe_texture *
  83 softpipe_texture_create(struct pipe_context *pipe,
  84                         const struct pipe_texture *templat)
  85 {
  86    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
  87    if (!spt)
  88       return NULL;
  89
  90    spt->base = *templat;
  91
  92    softpipe_texture_layout(spt);
  93
  94    spt->buffer = pipe->winsys->buffer_create(pipe->winsys, 32,
  95                                              PIPE_BUFFER_USAGE_PIXEL,
  96                                              spt->buffer_size);
  97    if (!spt->buffer) {
  98       FREE(spt);
  99       return NULL;
 100    }
 101
 102    return &spt->base;
 103 }
 104
 105
 106 void
 107 softpipe_texture_release(struct pipe_context *pipe, struct pipe_texture **pt)
 108 {
 109    if (!*pt)
 110       return;
 111
 112    /*
 113    DBG("%s %p refcount will be %d\n",
 114        __FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
 115    */
 116    if (--(*pt)->refcount <= 0) {
 117       struct softpipe_texture *spt = softpipe_texture(*pt);
 118
 119       /*
 120       DBG("%s deleting %p\n", __FUNCTION__, (void *) spt);
 121       */
 122
 123       pipe_buffer_reference(pipe->winsys, &spt->buffer, NULL);
 124
 125       FREE(spt);
 126    }
 127    *pt = NULL;
 128 }
 129
 130
 131 /**
 132  * Called via pipe->get_tex_surface()
 133  */
 134 struct pipe_surface *
 135 softpipe_get_tex_surface(struct pipe_context *pipe,
 136                          struct pipe_texture *pt,
 137                          unsigned face, unsigned level, unsigned zslice)
 138 {
 139    struct softpipe_texture *spt = softpipe_texture(pt);
 140    struct pipe_surface *ps;
 141
 142    assert(level <= pt->last_level);
 143
 144    ps = pipe->winsys->surface_alloc(pipe->winsys);
 145    if (ps) {
 146       assert(ps->refcount);
 147       assert(ps->winsys);
 148       pipe_buffer_reference(pipe->winsys, &ps->buffer, spt->buffer);
 149       ps->format = pt->format;
 150       ps->cpp = pt->cpp;
 151       ps->width = pt->width[level];
 152       ps->height = pt->height[level];
 153       ps->pitch = ps->width;
 154       ps->offset = spt->level_offset[level];
 155
 156       if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
 157          ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
 158                        (pt->compressed ? ps->height/4 : ps->height) *
 159                        ps->width * ps->cpp;
 160       } else {
 161          assert(face == 0);
 162          assert(zslice == 0);
 163       }
 164    }
 165    return ps;
 166 }