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 "util/u_simple_screen.h"/* port to just p_screen */
  40 #include "util/u_format.h"
  41 #include "util/u_math.h"
  42 #include "util/u_memory.h"
  43 #include "util/u_inlines.h"
  44 #include "pipe/p_format.h"
  45 #include "pipe/p_context.h"
  46 #include "sp_winsys.h"
  47
  48
  49 struct st_softpipe_buffer
  50 {
  51    struct pipe_buffer base;
  52    boolean userBuffer;  /** Is this a user-space buffer? */
  53    void *data;
  54    void *mapped;
  55 };
  56
  57
  58 /** Cast wrapper */
  59 static INLINE struct st_softpipe_buffer *
  60 st_softpipe_buffer( struct pipe_buffer *buf )
  61 {
  62    return (struct st_softpipe_buffer *)buf;
  63 }
  64
  65
  66 static void *
  67 st_softpipe_buffer_map(struct pipe_winsys *winsys,
  68                        struct pipe_buffer *buf,
  69                        unsigned flags)
  70 {
  71    struct st_softpipe_buffer *st_softpipe_buf = st_softpipe_buffer(buf);
  72    st_softpipe_buf->mapped = st_softpipe_buf->data;
  73    return st_softpipe_buf->mapped;
  74 }
  75
  76
  77 static void
  78 st_softpipe_buffer_unmap(struct pipe_winsys *winsys,
  79                          struct pipe_buffer *buf)
  80 {
  81    struct st_softpipe_buffer *st_softpipe_buf = st_softpipe_buffer(buf);
  82    st_softpipe_buf->mapped = NULL;
  83 }
  84
  85
  86 static void
  87 st_softpipe_buffer_destroy(struct pipe_buffer *buf)
  88 {
  89    struct st_softpipe_buffer *oldBuf = st_softpipe_buffer(buf);
  90
  91    if (oldBuf->data) {
  92       if (!oldBuf->userBuffer)
  93          align_free(oldBuf->data);
  94
  95       oldBuf->data = NULL;
  96    }
  97
  98    FREE(oldBuf);
  99 }
 100
 101
 102 static void
 103 st_softpipe_flush_frontbuffer(struct pipe_winsys *winsys,
 104                               struct pipe_surface *surf,
 105                               void *context_private)
 106 {
 107 }
 108
 109
 110
 111 static const char *
 112 st_softpipe_get_name(struct pipe_winsys *winsys)
 113 {
 114    return "softpipe";
 115 }
 116
 117
 118 static struct pipe_buffer *
 119 st_softpipe_buffer_create(struct pipe_winsys *winsys,
 120                           unsigned alignment,
 121                           unsigned usage,
 122                           unsigned size)
 123 {
 124    struct st_softpipe_buffer *buffer = CALLOC_STRUCT(st_softpipe_buffer);
 125
 126    pipe_reference_init(&buffer->base.reference, 1);
 127    buffer->base.alignment = alignment;
 128    buffer->base.usage = usage;
 129    buffer->base.size = size;
 130
 131    buffer->data = align_malloc(size, alignment);
 132
 133    return &buffer->base;
 134 }
 135
 136
 137 /**
 138  * Create buffer which wraps user-space data.
 139  */
 140 static struct pipe_buffer *
 141 st_softpipe_user_buffer_create(struct pipe_winsys *winsys,
 142                                void *ptr,
 143                                unsigned bytes)
 144 {
 145    struct st_softpipe_buffer *buffer;
 146
 147    buffer = CALLOC_STRUCT(st_softpipe_buffer);
 148    if(!buffer)
 149       return NULL;
 150
 151    pipe_reference_init(&buffer->base.reference, 1);
 152    buffer->base.size = bytes;
 153    buffer->userBuffer = TRUE;
 154    buffer->data = ptr;
 155
 156    return &buffer->base;
 157 }
 158
 159
 160 static struct pipe_buffer *
 161 st_softpipe_surface_buffer_create(struct pipe_winsys *winsys,
 162                                   unsigned width, unsigned height,
 163                                   enum pipe_format format,
 164                                   unsigned usage,
 165                                   unsigned tex_usage,
 166                                   unsigned *stride)
 167 {
 168    const unsigned alignment = 64;
 169    unsigned nblocksy;
 170
 171    nblocksy = util_format_get_nblocksy(format, height);
 172    *stride = align(util_format_get_stride(format, width), alignment);
 173
 174    return winsys->buffer_create(winsys, alignment,
 175                                 usage,
 176                                 *stride * nblocksy);
 177 }
 178
 179
 180 static void
 181 st_softpipe_fence_reference(struct pipe_winsys *winsys,
 182                             struct pipe_fence_handle **ptr,
 183                             struct pipe_fence_handle *fence)
 184 {
 185 }
 186
 187
 188 static int
 189 st_softpipe_fence_signalled(struct pipe_winsys *winsys,
 190                             struct pipe_fence_handle *fence,
 191                             unsigned flag)
 192 {
 193    return 0;
 194 }
 195
 196
 197 static int
 198 st_softpipe_fence_finish(struct pipe_winsys *winsys,
 199                          struct pipe_fence_handle *fence,
 200                          unsigned flag)
 201 {
 202    return 0;
 203 }
 204
 205
 206 static void
 207 st_softpipe_destroy(struct pipe_winsys *winsys)
 208 {
 209    FREE(winsys);
 210 }
 211
 212
 213 struct pipe_screen *
 214 softpipe_create_screen_malloc(void)
 215 {
 216    static struct pipe_winsys *winsys;
 217    struct pipe_screen *screen;
 218
 219    winsys = CALLOC_STRUCT(pipe_winsys);
 220    if(!winsys)
 221       return NULL;
 222
 223    winsys->destroy = st_softpipe_destroy;
 224
 225    winsys->buffer_create = st_softpipe_buffer_create;
 226    winsys->user_buffer_create = st_softpipe_user_buffer_create;
 227    winsys->buffer_map = st_softpipe_buffer_map;
 228    winsys->buffer_unmap = st_softpipe_buffer_unmap;
 229    winsys->buffer_destroy = st_softpipe_buffer_destroy;
 230
 231    winsys->surface_buffer_create = st_softpipe_surface_buffer_create;
 232
 233    winsys->fence_reference = st_softpipe_fence_reference;
 234    winsys->fence_signalled = st_softpipe_fence_signalled;
 235    winsys->fence_finish = st_softpipe_fence_finish;
 236
 237    winsys->flush_frontbuffer = st_softpipe_flush_frontbuffer;
 238    winsys->get_name = st_softpipe_get_name;
 239
 240    screen = softpipe_create_screen(winsys);
 241    if(!screen)
 242       st_softpipe_destroy(winsys);
 243
 244    return screen;
 245 }