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 xm_displaytarget
  41 {
  42    void *data;
  43    void *mapped;
  44 };
  45
  46
  47 /** Cast wrapper */
  48 static INLINE struct xm_displaytarget *
  49 xm_displaytarget( struct sw_displaytarget *dt )
  50 {
  51    return (struct xm_displaytarget *)dt;
  52 }
  53
  54
  55 /* pipe_screen::is_format_supported */
  56 static boolean
  57 xm_is_displaytarget_format_supported( struct sw_winsys *ws,
  58                                       unsigned tex_usage,
  59                                       enum pipe_format format )
  60 {
  61    /* TODO: check visuals or other sensible thing here */
  62    return TRUE;
  63 }
  64
  65 static INLINE int
  66 bytes_per_line(unsigned stride, unsigned mul)
  67 {
  68    unsigned mask = mul - 1;
  69
  70    return ((stride * 8 + mask) & ~mask) / 8;
  71 }
  72
  73 /* pipe_screen::texture_create DISPLAY_TARGET / SCANOUT / SHARED */
  74 static struct sw_displaytarget *
  75 xm_displaytarget_create(struct sw_winsys *winsys,
  76                         unsigned tex_usage,
  77                         enum pipe_format format,
  78                         unsigned width, unsigned height,
  79                         unsigned alignment,
  80                         unsigned *stride)
  81 {
  82    struct xm_displaytarget *xm_dt;
  83    unsigned nblocksy, size, xm_stride, loader_stride, format_stride;
  84
  85    xm_dt = CALLOC_STRUCT(xm_displaytarget);
  86    if(!xm_dt)
  87       goto no_xm_dt;
  88
  89    format_stride = util_format_get_stride(format, width);
  90    xm_stride = align(format_stride, alignment);
  91    loader_stride = bytes_per_line(format_stride, 32);
  92
  93    nblocksy = util_format_get_nblocksy(format, height);
  94    size = xm_stride * nblocksy;
  95
  96 #ifdef DEBUG
  97    debug_printf("swrast format stride: %8d\n", format_stride);
  98    debug_printf("swrast pipe stride  : %8d\n", xm_stride);
  99    debug_printf("swrast loader stride: %8d\n", loader_stride);
 100 #endif
 101
 102    /*
 103     * Allocate with the aligned stride required by the pipe but set the stride
 104     * to the one hardcoded in the loaders XXX
 105     */
 106
 107    xm_dt->data = align_malloc(size, alignment);
 108    if(!xm_dt->data)
 109       goto no_data;
 110
 111    *stride = loader_stride;
 112    return (struct sw_displaytarget *)xm_dt;
 113
 114 no_data:
 115    FREE(xm_dt);
 116 no_xm_dt:
 117    return NULL;
 118 }
 119
 120 /* pipe_screen::texture_destroy */
 121 static void
 122 xm_displaytarget_destroy(struct sw_winsys *ws,
 123                          struct sw_displaytarget *dt)
 124 {
 125    struct xm_displaytarget *xm_dt = xm_displaytarget(dt);
 126
 127    if (xm_dt->data) {
 128       FREE(xm_dt->data);
 129    }
 130
 131    FREE(xm_dt);
 132 }
 133
 134 /* pipe_context::transfer_map */
 135 static void *
 136 xm_displaytarget_map(struct sw_winsys *ws,
 137                      struct sw_displaytarget *dt,
 138                      unsigned flags)
 139 {
 140    struct xm_displaytarget *xm_dt = xm_displaytarget(dt);
 141    xm_dt->mapped = xm_dt->data;
 142    return xm_dt->mapped;
 143 }
 144
 145 /* pipe_context::transfer_unmap */
 146 static void
 147 xm_displaytarget_unmap(struct sw_winsys *ws,
 148                        struct sw_displaytarget *dt)
 149 {
 150    struct xm_displaytarget *xm_dt = xm_displaytarget(dt);
 151    xm_dt->mapped = NULL;
 152 }
 153
 154 /* pipe_screen::texture_from_handle */
 155 static struct sw_displaytarget *
 156 xm_displaytarget_from_handle(struct sw_winsys *winsys,
 157                              const struct pipe_texture *templ,
 158                              struct winsys_handle *whandle,
 159                              unsigned *stride)
 160 {
 161    assert(0);
 162    return NULL;
 163 }
 164
 165 /* pipe_screen::texture_get_handle */
 166 static boolean
 167 xm_displaytarget_get_handle(struct sw_winsys *winsys,
 168                             struct sw_displaytarget *dt,
 169                             struct winsys_handle *whandle)
 170 {
 171    assert(0);
 172    return FALSE;
 173 }
 174
 175 /* pipe_screen::flush_frontbuffer */
 176 static void
 177 xm_displaytarget_display(struct sw_winsys *ws,
 178                          struct sw_displaytarget *dt,
 179                          void *context_private)
 180 {
 181    assert(0);
 182 }
 183
 184
 185 static void
 186 dri_destroy_sw_winsys(struct sw_winsys *winsys)
 187 {
 188    FREE(winsys);
 189 }
 190
 191 struct sw_winsys *
 192 dri_create_sw_winsys(void)
 193 {
 194    struct sw_winsys *ws;
 195
 196    ws = CALLOC_STRUCT(sw_winsys);
 197    if (!ws)
 198       return NULL;
 199
 200    ws->destroy = dri_destroy_sw_winsys;
 201
 202    ws->is_displaytarget_format_supported = xm_is_displaytarget_format_supported;
 203
 204    /* screen texture functions */
 205    ws->displaytarget_create = xm_displaytarget_create;
 206    ws->displaytarget_destroy = xm_displaytarget_destroy;
 207    ws->displaytarget_from_handle = xm_displaytarget_from_handle;
 208    ws->displaytarget_get_handle = xm_displaytarget_get_handle;
 209
 210    /* texture functions */
 211    ws->displaytarget_map = xm_displaytarget_map;
 212    ws->displaytarget_unmap = xm_displaytarget_unmap;
 213
 214    ws->displaytarget_display = xm_displaytarget_display;
 215
 216    return ws;
 217 }
 218
 219 /* vim: set sw=3 ts=8 sts=3 expandtab: */