src/gallium/drivers/softpipe/sp_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
   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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  *
  27  **************************************************************************/
  28
  29 /**
  30  * @file
  31  * Malloc softpipe winsys. Uses malloc for all memory allocations.
  32  *
  33  * @author Keith Whitwell
  34  * @author Brian Paul
  35  * @author Jose Fonseca
  36  */
  37
  38
  39 #include "pipe/internal/p_winsys_screen.h"/* port to just p_screen */
  40 #include "pipe/p_format.h"
  41 #include "pipe/p_context.h"
  42 #include "util/u_format.h"
  43 #include "util/u_math.h"
  44 #include "util/u_memory.h"
  45 #include "softpipe/sp_winsys.h"
  46
  47
  48 struct st_softpipe_buffer
  49 {
  50    struct pipe_buffer base;
  51    boolean userBuffer;  /** Is this a user-space buffer? */
  52    void *data;
  53    void *mapped;
  54 };
  55
  56
  57 /** Cast wrapper */
  58 static INLINE struct st_softpipe_buffer *
  59 st_softpipe_buffer( struct pipe_buffer *buf )
  60 {
  61    return (struct st_softpipe_buffer *)buf;
  62 }
  63
  64
  65 static void *
  66 st_softpipe_buffer_map(struct pipe_winsys *winsys,
  67                        struct pipe_buffer *buf,
  68                        unsigned flags)
  69 {
  70    struct st_softpipe_buffer *st_softpipe_buf = st_softpipe_buffer(buf);
  71    st_softpipe_buf->mapped = st_softpipe_buf->data;
  72    return st_softpipe_buf->mapped;
  73 }
  74
  75
  76 static void
  77 st_softpipe_buffer_unmap(struct pipe_winsys *winsys,
  78                          struct pipe_buffer *buf)
  79 {
  80    struct st_softpipe_buffer *st_softpipe_buf = st_softpipe_buffer(buf);
  81    st_softpipe_buf->mapped = NULL;
  82 }
  83
  84
  85 static void
  86 st_softpipe_buffer_destroy(struct pipe_buffer *buf)
  87 {
  88    struct st_softpipe_buffer *oldBuf = st_softpipe_buffer(buf);
  89
  90    if (oldBuf->data) {
  91       if (!oldBuf->userBuffer)
  92          align_free(oldBuf->data);
  93
  94       oldBuf->data = NULL;
  95    }
  96
  97    FREE(oldBuf);
  98 }
  99
 100
 101 static void
 102 st_softpipe_flush_frontbuffer(struct pipe_winsys *winsys,
 103                               struct pipe_surface *surf,
 104                               void *context_private)
 105 {
 106 }
 107
 108
 109
 110 static const char *
 111 st_softpipe_get_name(struct pipe_winsys *winsys)
 112 {
 113    return "softpipe";
 114 }
 115
 116
 117 static struct pipe_buffer *
 118 st_softpipe_buffer_create(struct pipe_winsys *winsys,
 119                           unsigned alignment,
 120                           unsigned usage,
 121                           unsigned size)
 122 {
 123    struct st_softpipe_buffer *buffer = CALLOC_STRUCT(st_softpipe_buffer);
 124
 125    pipe_reference_init(&buffer->base.reference, 1);
 126    buffer->base.alignment = alignment;
 127    buffer->base.usage = usage;
 128    buffer->base.size = size;
 129
 130    buffer->data = align_malloc(size, alignment);
 131
 132    return &buffer->base;
 133 }
 134
 135
 136 /**
 137  * Create buffer which wraps user-space data.
 138  */
 139 static struct pipe_buffer *
 140 st_softpipe_user_buffer_create(struct pipe_winsys *winsys,
 141                                void *ptr,
 142                                unsigned bytes)
 143 {
 144    struct st_softpipe_buffer *buffer;
 145
 146    buffer = CALLOC_STRUCT(st_softpipe_buffer);
 147    if(!buffer)
 148       return NULL;
 149
 150    pipe_reference_init(&buffer->base.reference, 1);
 151    buffer->base.size = bytes;
 152    buffer->userBuffer = TRUE;
 153    buffer->data = ptr;
 154
 155    return &buffer->base;
 156 }
 157
 158
 159 static struct pipe_buffer *
 160 st_softpipe_surface_buffer_create(struct pipe_winsys *winsys,
 161                                   unsigned width, unsigned height,
 162                                   enum pipe_format format,
 163                                   unsigned usage,
 164                                   unsigned tex_usage,
 165                                   unsigned *stride)
 166 {
 167    const unsigned alignment = 64;
 168    unsigned nblocksy;
 169
 170    nblocksy = util_format_get_nblocksy(format, height);
 171    *stride = align(util_format_get_stride(format, width), alignment);
 172
 173    return winsys->buffer_create(winsys, alignment,
 174                                 usage,
 175                                 *stride * nblocksy);
 176 }
 177
 178
 179 static void
 180 st_softpipe_fence_reference(struct pipe_winsys *winsys,
 181                             struct pipe_fence_handle **ptr,
 182                             struct pipe_fence_handle *fence)
 183 {
 184 }
 185
 186
 187 static int
 188 st_softpipe_fence_signalled(struct pipe_winsys *winsys,
 189                             struct pipe_fence_handle *fence,
 190                             unsigned flag)
 191 {
 192    return 0;
 193 }
 194
 195
 196 static int
 197 st_softpipe_fence_finish(struct pipe_winsys *winsys,
 198                          struct pipe_fence_handle *fence,
 199                          unsigned flag)
 200 {
 201    return 0;
 202 }
 203
 204
 205 static void
 206 st_softpipe_destroy(struct pipe_winsys *winsys)
 207 {
 208    FREE(winsys);
 209 }
 210
 211
 212 struct pipe_screen *
 213 softpipe_create_screen_malloc(void)
 214 {
 215    static struct pipe_winsys *winsys;
 216    struct pipe_screen *screen;
 217
 218    winsys = CALLOC_STRUCT(pipe_winsys);
 219    if(!winsys)
 220       return NULL;
 221
 222    winsys->destroy = st_softpipe_destroy;
 223
 224    winsys->buffer_create = st_softpipe_buffer_create;
 225    winsys->user_buffer_create = st_softpipe_user_buffer_create;
 226    winsys->buffer_map = st_softpipe_buffer_map;
 227    winsys->buffer_unmap = st_softpipe_buffer_unmap;
 228    winsys->buffer_destroy = st_softpipe_buffer_destroy;
 229
 230    winsys->surface_buffer_create = st_softpipe_surface_buffer_create;
 231
 232    winsys->fence_reference = st_softpipe_fence_reference;
 233    winsys->fence_signalled = st_softpipe_fence_signalled;
 234    winsys->fence_finish = st_softpipe_fence_finish;
 235
 236    winsys->flush_frontbuffer = st_softpipe_flush_frontbuffer;
 237    winsys->get_name = st_softpipe_get_name;
 238
 239    screen = softpipe_create_screen(winsys);
 240    if(!screen)
 241       st_softpipe_destroy(winsys);
 242
 243    return screen;
 244 }