src/gallium/drivers/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 #include "sp_tile_cache.h"
  43
  44
  45 /* Simple, maximally packed layout.
  46  */
  47
  48 static unsigned minify( unsigned d )
  49 {
  50    return MAX2(1, d>>1);
  51 }
  52
  53
  54 static void
  55 softpipe_texture_layout(struct softpipe_texture * spt)
  56 {
  57    struct pipe_texture *pt = &spt->base;
  58    unsigned level;
  59    unsigned width = pt->width[0];
  60    unsigned height = pt->height[0];
  61    unsigned depth = pt->depth[0];
  62
  63    spt->buffer_size = 0;
  64
  65    for (level = 0; level <= pt->last_level; level++) {
  66       pt->width[level] = width;
  67       pt->height[level] = height;
  68       pt->depth[level] = depth;
  69
  70       spt->level_offset[level] = spt->buffer_size;
  71
  72       spt->buffer_size += ((pt->compressed) ? MAX2(1, height/4) : height) *
  73                           ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
  74                           width * pt->cpp;
  75
  76       width  = minify(width);
  77       height = minify(height);
  78       depth = minify(depth);
  79    }
  80 }
  81
  82
  83 static struct pipe_texture *
  84 softpipe_texture_create_screen(struct pipe_screen *screen,
  85                                const struct pipe_texture *templat)
  86 {
  87    struct pipe_winsys *ws = screen->winsys;
  88    struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
  89    if (!spt)
  90       return NULL;
  91
  92    spt->base = *templat;
  93    spt->base.refcount = 1;
  94    spt->base.screen = screen;
  95
  96    softpipe_texture_layout(spt);
  97
  98    spt->buffer = ws->buffer_create(ws, 32,
  99                                    PIPE_BUFFER_USAGE_PIXEL,
 100                                    spt->buffer_size);
 101    if (!spt->buffer) {
 102       FREE(spt);
 103       return NULL;
 104    }
 105
 106    assert(spt->base.refcount == 1);
 107
 108    return &spt->base;
 109 }
 110
 111
 112 static void
 113 softpipe_texture_release_screen(struct pipe_screen *screen,
 114                                 struct pipe_texture **pt)
 115 {
 116    if (!*pt)
 117       return;
 118
 119    /*
 120    DBG("%s %p refcount will be %d\n",
 121        __FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
 122    */
 123    if (--(*pt)->refcount <= 0) {
 124       struct softpipe_texture *spt = softpipe_texture(*pt);
 125
 126       /*
 127       DBG("%s deleting %p\n", __FUNCTION__, (void *) spt);
 128       */
 129
 130       pipe_buffer_reference(screen->winsys, &spt->buffer, NULL);
 131
 132       FREE(spt);
 133    }
 134    *pt = NULL;
 135 }
 136
 137
 138 static struct pipe_surface *
 139 softpipe_get_tex_surface_screen(struct pipe_screen *screen,
 140                                 struct pipe_texture *pt,
 141                                 unsigned face, unsigned level, unsigned zslice)
 142 {
 143    struct pipe_winsys *ws = screen->winsys;
 144    struct softpipe_texture *spt = softpipe_texture(pt);
 145    struct pipe_surface *ps;
 146
 147    assert(level <= pt->last_level);
 148
 149    ps = ws->surface_alloc(ws);
 150    if (ps) {
 151       assert(ps->refcount);
 152       assert(ps->winsys);
 153       pipe_buffer_reference(ws, &ps->buffer, spt->buffer);
 154       ps->format = pt->format;
 155       ps->cpp = pt->cpp;
 156       ps->width = pt->width[level];
 157       ps->height = pt->height[level];
 158       ps->pitch = ps->width;
 159       ps->offset = spt->level_offset[level];
 160
 161       if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
 162          ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
 163                        (pt->compressed ? ps->height/4 : ps->height) *
 164                        ps->width * ps->cpp;
 165       }
 166       else {
 167          assert(face == 0);
 168          assert(zslice == 0);
 169       }
 170    }
 171    return ps;
 172 }
 173
 174
 175 static void
 176 softpipe_texture_update(struct pipe_context *pipe,
 177                         struct pipe_texture *texture)
 178 {
 179    struct softpipe_context *softpipe = softpipe_context(pipe);
 180    uint unit;
 181    for (unit = 0; unit < softpipe->num_textures; unit++) {
 182       if (softpipe->texture[unit] == texture) {
 183          sp_flush_tile_cache(softpipe, softpipe->tex_cache[unit]);
 184       }
 185    }
 186 }
 187
 188
 189 void
 190 softpipe_init_texture_funcs( struct softpipe_context *softpipe )
 191 {
 192    softpipe->pipe.texture_update = softpipe_texture_update;
 193 }
 194
 195
 196 void
 197 softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
 198 {
 199    screen->texture_create = softpipe_texture_create_screen;
 200    screen->texture_release = softpipe_texture_release_screen;
 201    screen->get_tex_surface = softpipe_get_tex_surface_screen;
 202 }