src/gallium/winsys/sw/dri/dri_sw_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009, VMware, Inc.
   4  * All Rights Reserved.
   5  * Copyright 2010 George Sapountzis <gsapountzis@gmail.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 #include "pipe/p_compiler.h"
  30 #include "pipe/p_format.h"
  31 #include "util/u_inlines.h"
  32 #include "util/u_format.h"
  33 #include "util/u_math.h"
  34 #include "util/u_memory.h"
  35
  36 #include "state_tracker/sw_winsys.h"
  37 #include "dri_sw_winsys.h"
  38
  39
  40 struct dri_sw_displaytarget
  41 {
  42    enum pipe_format format;
  43    unsigned width;
  44    unsigned height;
  45    unsigned stride;
  46
  47    void *data;
  48    void *mapped;
  49 };
  50
  51 struct dri_sw_winsys
  52 {
  53    struct sw_winsys base;
  54
  55    struct drisw_loader_funcs *lf;
  56 };
  57
  58 static inline struct dri_sw_displaytarget *
  59 dri_sw_displaytarget( struct sw_displaytarget *dt )
  60 {
  61    return (struct dri_sw_displaytarget *)dt;
  62 }
  63
  64 static inline struct dri_sw_winsys *
  65 dri_sw_winsys( struct sw_winsys *ws )
  66 {
  67    return (struct dri_sw_winsys *)ws;
  68 }
  69
  70
  71 static boolean
  72 dri_sw_is_displaytarget_format_supported( struct sw_winsys *ws,
  73                                           unsigned tex_usage,
  74                                           enum pipe_format format )
  75 {
  76    /* TODO: check visuals or other sensible thing here */
  77    return TRUE;
  78 }
  79
  80 static struct sw_displaytarget *
  81 dri_sw_displaytarget_create(struct sw_winsys *winsys,
  82                             unsigned tex_usage,
  83                             enum pipe_format format,
  84                             unsigned width, unsigned height,
  85                             unsigned alignment,
  86                             unsigned *stride)
  87 {
  88    struct dri_sw_displaytarget *dri_sw_dt;
  89    unsigned nblocksy, size, format_stride;
  90
  91    dri_sw_dt = CALLOC_STRUCT(dri_sw_displaytarget);
  92    if(!dri_sw_dt)
  93       goto no_dt;
  94
  95    dri_sw_dt->format = format;
  96    dri_sw_dt->width = width;
  97    dri_sw_dt->height = height;
  98
  99    format_stride = util_format_get_stride(format, width);
 100    dri_sw_dt->stride = align(format_stride, alignment);
 101
 102    nblocksy = util_format_get_nblocksy(format, height);
 103    size = dri_sw_dt->stride * nblocksy;
 104
 105    dri_sw_dt->data = align_malloc(size, alignment);
 106    if(!dri_sw_dt->data)
 107       goto no_data;
 108
 109    *stride = dri_sw_dt->stride;
 110    return (struct sw_displaytarget *)dri_sw_dt;
 111
 112 no_data:
 113    FREE(dri_sw_dt);
 114 no_dt:
 115    return NULL;
 116 }
 117
 118 static void
 119 dri_sw_displaytarget_destroy(struct sw_winsys *ws,
 120                              struct sw_displaytarget *dt)
 121 {
 122    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 123
 124    FREE(dri_sw_dt->data);
 125
 126    FREE(dri_sw_dt);
 127 }
 128
 129 static void *
 130 dri_sw_displaytarget_map(struct sw_winsys *ws,
 131                          struct sw_displaytarget *dt,
 132                          unsigned flags)
 133 {
 134    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 135    dri_sw_dt->mapped = dri_sw_dt->data;
 136    return dri_sw_dt->mapped;
 137 }
 138
 139 static void
 140 dri_sw_displaytarget_unmap(struct sw_winsys *ws,
 141                            struct sw_displaytarget *dt)
 142 {
 143    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 144    dri_sw_dt->mapped = NULL;
 145 }
 146
 147 static struct sw_displaytarget *
 148 dri_sw_displaytarget_from_handle(struct sw_winsys *winsys,
 149                                  const struct pipe_resource *templ,
 150                                  struct winsys_handle *whandle,
 151                                  unsigned *stride)
 152 {
 153    assert(0);
 154    return NULL;
 155 }
 156
 157 static boolean
 158 dri_sw_displaytarget_get_handle(struct sw_winsys *winsys,
 159                                 struct sw_displaytarget *dt,
 160                                 struct winsys_handle *whandle)
 161 {
 162    assert(0);
 163    return FALSE;
 164 }
 165
 166 static void
 167 dri_sw_displaytarget_display(struct sw_winsys *ws,
 168                              struct sw_displaytarget *dt,
 169                              void *context_private,
 170                              struct pipe_box *box)
 171 {
 172    struct dri_sw_winsys *dri_sw_ws = dri_sw_winsys(ws);
 173    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 174    struct dri_drawable *dri_drawable = (struct dri_drawable *)context_private;
 175    unsigned width, height;
 176    unsigned blsize = util_format_get_blocksize(dri_sw_dt->format);
 177
 178    /* Set the width to 'stride / cpp'.
 179     *
 180     * PutImage correctly clips to the width of the dst drawable.
 181     */
 182    width = dri_sw_dt->stride / blsize;
 183
 184    height = dri_sw_dt->height;
 185
 186    if (box) {
 187        void *data;
 188        data = dri_sw_dt->data + (dri_sw_dt->stride * box->y) + box->x * blsize;
 189        dri_sw_ws->lf->put_image2(dri_drawable, data,
 190                                  box->x, box->y, box->width, box->height, dri_sw_dt->stride);
 191    } else {
 192        dri_sw_ws->lf->put_image(dri_drawable, dri_sw_dt->data, width, height);
 193    }
 194 }
 195
 196 static void
 197 dri_destroy_sw_winsys(struct sw_winsys *winsys)
 198 {
 199    FREE(winsys);
 200 }
 201
 202 struct sw_winsys *
 203 dri_create_sw_winsys(struct drisw_loader_funcs *lf)
 204 {
 205    struct dri_sw_winsys *ws;
 206
 207    ws = CALLOC_STRUCT(dri_sw_winsys);
 208    if (!ws)
 209       return NULL;
 210
 211    ws->lf = lf;
 212    ws->base.destroy = dri_destroy_sw_winsys;
 213
 214    ws->base.is_displaytarget_format_supported = dri_sw_is_displaytarget_format_supported;
 215
 216    /* screen texture functions */
 217    ws->base.displaytarget_create = dri_sw_displaytarget_create;
 218    ws->base.displaytarget_destroy = dri_sw_displaytarget_destroy;
 219    ws->base.displaytarget_from_handle = dri_sw_displaytarget_from_handle;
 220    ws->base.displaytarget_get_handle = dri_sw_displaytarget_get_handle;
 221
 222    /* texture functions */
 223    ws->base.displaytarget_map = dri_sw_displaytarget_map;
 224    ws->base.displaytarget_unmap = dri_sw_displaytarget_unmap;
 225
 226    ws->base.displaytarget_display = dri_sw_displaytarget_display;
 227
 228    return &ws->base;
 229 }
 230
 231 /* vim: set sw=3 ts=8 sts=3 expandtab: */