src/gallium/state_trackers/python/st_softpipe_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
   4  * All Rights Reserved.
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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  24  * of the Software.
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  27  **************************************************************************/
  28
  29 /**
  30  * @file
  31  * Softpipe support.
  32  *
  33  * @author Keith Whitwell
  34  * @author Brian Paul
  35  * @author Jose Fonseca
  36  */
  37
  38
  39 #include "pipe/p_winsys.h"
  40 #include "pipe/p_format.h"
  41 #include "pipe/p_context.h"
  42 #include "pipe/p_inlines.h"
  43 #include "util/u_math.h"
  44 #include "util/u_memory.h"
  45 #include "softpipe/sp_winsys.h"
  46 #include "st_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_winsys *winsys,
  88                            struct pipe_buffer *buf)
  89 {
  90    struct st_softpipe_buffer *oldBuf = st_softpipe_buffer(buf);
  91
  92    if (oldBuf->data) {
  93       if (!oldBuf->userBuffer)
  94          align_free(oldBuf->data);
  95
  96       oldBuf->data = NULL;
  97    }
  98
  99    FREE(oldBuf);
 100 }
 101
 102
 103 static void
 104 st_softpipe_flush_frontbuffer(struct pipe_winsys *winsys,
 105                               struct pipe_surface *surf,
 106                               void *context_private)
 107 {
 108 }
 109
 110
 111
 112 static const char *
 113 st_softpipe_get_name(struct pipe_winsys *winsys)
 114 {
 115    return "softpipe";
 116 }
 117
 118
 119 static struct pipe_buffer *
 120 st_softpipe_buffer_create(struct pipe_winsys *winsys,
 121                           unsigned alignment,
 122                           unsigned usage,
 123                           unsigned size)
 124 {
 125    struct st_softpipe_buffer *buffer = CALLOC_STRUCT(st_softpipe_buffer);
 126
 127    buffer->base.refcount = 1;
 128    buffer->base.alignment = alignment;
 129    buffer->base.usage = usage;
 130    buffer->base.size = size;
 131
 132    buffer->data = align_malloc(size, alignment);
 133
 134    return &buffer->base;
 135 }
 136
 137
 138 /**
 139  * Create buffer which wraps user-space data.
 140  */
 141 static struct pipe_buffer *
 142 st_softpipe_user_buffer_create(struct pipe_winsys *winsys,
 143                                void *ptr,
 144                                unsigned bytes)
 145 {
 146    struct st_softpipe_buffer *buffer;
 147
 148    buffer = CALLOC_STRUCT(st_softpipe_buffer);
 149    if(!buffer)
 150       return NULL;
 151
 152    buffer->base.refcount = 1;
 153    buffer->base.size = bytes;
 154    buffer->userBuffer = TRUE;
 155    buffer->data = ptr;
 156
 157    return &buffer->base;
 158 }
 159
 160
 161 /**
 162  * Round n up to next multiple.
 163  */
 164 static INLINE unsigned
 165 round_up(unsigned n, unsigned multiple)
 166 {
 167    return (n + multiple - 1) & ~(multiple - 1);
 168 }
 169
 170
 171 static int
 172 st_softpipe_surface_alloc_storage(struct pipe_winsys *winsys,
 173                                   struct pipe_surface *surf,
 174                                   unsigned width, unsigned height,
 175                                   enum pipe_format format,
 176                                   unsigned flags,
 177                                   unsigned tex_usage)
 178 {
 179    const unsigned alignment = 64;
 180
 181    surf->width = width;
 182    surf->height = height;
 183    surf->format = format;
 184    pf_get_block(format, &surf->block);
 185    surf->nblocksx = pf_get_nblocksx(&surf->block, width);
 186    surf->nblocksy = pf_get_nblocksy(&surf->block, height);
 187    surf->stride = round_up(surf->nblocksx * surf->block.size, alignment);
 188    surf->usage = flags;
 189
 190    assert(!surf->buffer);
 191    surf->buffer = winsys->buffer_create(winsys, alignment,
 192                                         PIPE_BUFFER_USAGE_PIXEL,
 193                                         surf->stride * surf->nblocksy);
 194    if(!surf->buffer)
 195       return -1;
 196
 197    return 0;
 198 }
 199
 200
 201 static struct pipe_surface *
 202 st_softpipe_surface_alloc(struct pipe_winsys *winsys)
 203 {
 204    struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
 205
 206    assert(winsys);
 207
 208    surface->refcount = 1;
 209    surface->winsys = winsys;
 210
 211    return surface;
 212 }
 213
 214
 215 static void
 216 st_softpipe_surface_release(struct pipe_winsys *winsys,
 217                             struct pipe_surface **s)
 218 {
 219    struct pipe_surface *surf = *s;
 220    assert(!surf->texture);
 221    surf->refcount--;
 222    if (surf->refcount == 0) {
 223       if (surf->buffer)
 224         winsys_buffer_reference(winsys, &surf->buffer, NULL);
 225       free(surf);
 226    }
 227    *s = NULL;
 228 }
 229
 230
 231 static void
 232 st_softpipe_fence_reference(struct pipe_winsys *winsys,
 233                             struct pipe_fence_handle **ptr,
 234                             struct pipe_fence_handle *fence)
 235 {
 236 }
 237
 238
 239 static int
 240 st_softpipe_fence_signalled(struct pipe_winsys *winsys,
 241                             struct pipe_fence_handle *fence,
 242                             unsigned flag)
 243 {
 244    return 0;
 245 }
 246
 247
 248 static int
 249 st_softpipe_fence_finish(struct pipe_winsys *winsys,
 250                          struct pipe_fence_handle *fence,
 251                          unsigned flag)
 252 {
 253    return 0;
 254 }
 255
 256
 257 static void
 258 st_softpipe_destroy(struct pipe_winsys *winsys)
 259 {
 260    FREE(winsys);
 261 }
 262
 263
 264 static struct pipe_screen *
 265 st_softpipe_screen_create(void)
 266 {
 267    static struct pipe_winsys *winsys;
 268    struct pipe_screen *screen;
 269
 270    winsys = CALLOC_STRUCT(pipe_winsys);
 271    if(!winsys)
 272       return NULL;
 273
 274    winsys->destroy = st_softpipe_destroy;
 275
 276    winsys->buffer_create = st_softpipe_buffer_create;
 277    winsys->user_buffer_create = st_softpipe_user_buffer_create;
 278    winsys->buffer_map = st_softpipe_buffer_map;
 279    winsys->buffer_unmap = st_softpipe_buffer_unmap;
 280    winsys->buffer_destroy = st_softpipe_buffer_destroy;
 281
 282    winsys->surface_alloc = st_softpipe_surface_alloc;
 283    winsys->surface_alloc_storage = st_softpipe_surface_alloc_storage;
 284    winsys->surface_release = st_softpipe_surface_release;
 285
 286    winsys->fence_reference = st_softpipe_fence_reference;
 287    winsys->fence_signalled = st_softpipe_fence_signalled;
 288    winsys->fence_finish = st_softpipe_fence_finish;
 289
 290    winsys->flush_frontbuffer = st_softpipe_flush_frontbuffer;
 291    winsys->get_name = st_softpipe_get_name;
 292
 293    screen = softpipe_create_screen(winsys);
 294    if(!screen)
 295       st_softpipe_destroy(winsys);
 296
 297    return screen;
 298 }
 299
 300
 301 static struct pipe_context *
 302 st_softpipe_context_create(struct pipe_screen *screen)
 303 {
 304    return softpipe_create(screen, screen->winsys, NULL);
 305 }
 306
 307
 308 const struct st_winsys st_softpipe_winsys = {
 309    &st_softpipe_screen_create,
 310    &st_softpipe_context_create,
 311 };