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    unsigned map_flags;
  48    void *data;
  49    void *mapped;
  50    const void *front_private;
  51 };
  52
  53 struct dri_sw_winsys
  54 {
  55    struct sw_winsys base;
  56
  57    struct drisw_loader_funcs *lf;
  58 };
  59
  60 static inline struct dri_sw_displaytarget *
  61 dri_sw_displaytarget( struct sw_displaytarget *dt )
  62 {
  63    return (struct dri_sw_displaytarget *)dt;
  64 }
  65
  66 static inline struct dri_sw_winsys *
  67 dri_sw_winsys( struct sw_winsys *ws )
  68 {
  69    return (struct dri_sw_winsys *)ws;
  70 }
  71
  72
  73 static boolean
  74 dri_sw_is_displaytarget_format_supported( struct sw_winsys *ws,
  75                                           unsigned tex_usage,
  76                                           enum pipe_format format )
  77 {
  78    /* TODO: check visuals or other sensible thing here */
  79    return TRUE;
  80 }
  81
  82 static struct sw_displaytarget *
  83 dri_sw_displaytarget_create(struct sw_winsys *winsys,
  84                             unsigned tex_usage,
  85                             enum pipe_format format,
  86                             unsigned width, unsigned height,
  87                             unsigned alignment,
  88                             const void *front_private,
  89                             unsigned *stride)
  90 {
  91    struct dri_sw_displaytarget *dri_sw_dt;
  92    unsigned nblocksy, size, format_stride;
  93
  94    dri_sw_dt = CALLOC_STRUCT(dri_sw_displaytarget);
  95    if(!dri_sw_dt)
  96       goto no_dt;
  97
  98    dri_sw_dt->format = format;
  99    dri_sw_dt->width = width;
 100    dri_sw_dt->height = height;
 101    dri_sw_dt->front_private = front_private;
 102
 103    format_stride = util_format_get_stride(format, width);
 104    dri_sw_dt->stride = align(format_stride, alignment);
 105
 106    nblocksy = util_format_get_nblocksy(format, height);
 107    size = dri_sw_dt->stride * nblocksy;
 108
 109    dri_sw_dt->data = align_malloc(size, alignment);
 110    if(!dri_sw_dt->data)
 111       goto no_data;
 112
 113    *stride = dri_sw_dt->stride;
 114    return (struct sw_displaytarget *)dri_sw_dt;
 115
 116 no_data:
 117    FREE(dri_sw_dt);
 118 no_dt:
 119    return NULL;
 120 }
 121
 122 static void
 123 dri_sw_displaytarget_destroy(struct sw_winsys *ws,
 124                              struct sw_displaytarget *dt)
 125 {
 126    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 127
 128    align_free(dri_sw_dt->data);
 129
 130    FREE(dri_sw_dt);
 131 }
 132
 133 static void *
 134 dri_sw_displaytarget_map(struct sw_winsys *ws,
 135                          struct sw_displaytarget *dt,
 136                          unsigned flags)
 137 {
 138    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 139    dri_sw_dt->mapped = dri_sw_dt->data;
 140
 141    if (dri_sw_dt->front_private && (flags & PIPE_TRANSFER_READ)) {
 142       struct dri_sw_winsys *dri_sw_ws = dri_sw_winsys(ws);
 143       dri_sw_ws->lf->get_image((void *)dri_sw_dt->front_private, 0, 0, dri_sw_dt->width, dri_sw_dt->height, dri_sw_dt->stride, dri_sw_dt->data);
 144    }
 145    dri_sw_dt->map_flags = flags;
 146    return dri_sw_dt->mapped;
 147 }
 148
 149 static void
 150 dri_sw_displaytarget_unmap(struct sw_winsys *ws,
 151                            struct sw_displaytarget *dt)
 152 {
 153    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 154    if (dri_sw_dt->front_private && (dri_sw_dt->map_flags & PIPE_TRANSFER_WRITE)) {
 155       struct dri_sw_winsys *dri_sw_ws = dri_sw_winsys(ws);
 156       dri_sw_ws->lf->put_image2((void *)dri_sw_dt->front_private, dri_sw_dt->data, 0, 0, dri_sw_dt->width, dri_sw_dt->height, dri_sw_dt->stride);
 157    }
 158    dri_sw_dt->map_flags = 0;
 159    dri_sw_dt->mapped = NULL;
 160 }
 161
 162 static struct sw_displaytarget *
 163 dri_sw_displaytarget_from_handle(struct sw_winsys *winsys,
 164                                  const struct pipe_resource *templ,
 165                                  struct winsys_handle *whandle,
 166                                  unsigned *stride)
 167 {
 168    assert(0);
 169    return NULL;
 170 }
 171
 172 static boolean
 173 dri_sw_displaytarget_get_handle(struct sw_winsys *winsys,
 174                                 struct sw_displaytarget *dt,
 175                                 struct winsys_handle *whandle)
 176 {
 177    assert(0);
 178    return FALSE;
 179 }
 180
 181 static void
 182 dri_sw_displaytarget_display(struct sw_winsys *ws,
 183                              struct sw_displaytarget *dt,
 184                              void *context_private,
 185                              struct pipe_box *box)
 186 {
 187    struct dri_sw_winsys *dri_sw_ws = dri_sw_winsys(ws);
 188    struct dri_sw_displaytarget *dri_sw_dt = dri_sw_displaytarget(dt);
 189    struct dri_drawable *dri_drawable = (struct dri_drawable *)context_private;
 190    unsigned width, height;
 191    unsigned blsize = util_format_get_blocksize(dri_sw_dt->format);
 192
 193    /* Set the width to 'stride / cpp'.
 194     *
 195     * PutImage correctly clips to the width of the dst drawable.
 196     */
 197    width = dri_sw_dt->stride / blsize;
 198
 199    height = dri_sw_dt->height;
 200
 201    if (box) {
 202        void *data;
 203        data = (char *)dri_sw_dt->data + (dri_sw_dt->stride * box->y) + box->x * blsize;
 204        dri_sw_ws->lf->put_image2(dri_drawable, data,
 205                                  box->x, box->y, box->width, box->height, dri_sw_dt->stride);
 206    } else {
 207        dri_sw_ws->lf->put_image(dri_drawable, dri_sw_dt->data, width, height);
 208    }
 209 }
 210
 211 static void
 212 dri_destroy_sw_winsys(struct sw_winsys *winsys)
 213 {
 214    FREE(winsys);
 215 }
 216
 217 struct sw_winsys *
 218 dri_create_sw_winsys(struct drisw_loader_funcs *lf)
 219 {
 220    struct dri_sw_winsys *ws;
 221
 222    ws = CALLOC_STRUCT(dri_sw_winsys);
 223    if (!ws)
 224       return NULL;
 225
 226    ws->lf = lf;
 227    ws->base.destroy = dri_destroy_sw_winsys;
 228
 229    ws->base.is_displaytarget_format_supported = dri_sw_is_displaytarget_format_supported;
 230
 231    /* screen texture functions */
 232    ws->base.displaytarget_create = dri_sw_displaytarget_create;
 233    ws->base.displaytarget_destroy = dri_sw_displaytarget_destroy;
 234    ws->base.displaytarget_from_handle = dri_sw_displaytarget_from_handle;
 235    ws->base.displaytarget_get_handle = dri_sw_displaytarget_get_handle;
 236
 237    /* texture functions */
 238    ws->base.displaytarget_map = dri_sw_displaytarget_map;
 239    ws->base.displaytarget_unmap = dri_sw_displaytarget_unmap;
 240
 241    ws->base.displaytarget_display = dri_sw_displaytarget_display;
 242
 243    return &ws->base;
 244 }
 245
 246 /* vim: set sw=3 ts=8 sts=3 expandtab: */