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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  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/internal/p_winsys_screen.h"/* port to just p_screen */
  40 #include "pipe/p_format.h"
  41 #include "pipe/p_context.h"
  42 #include "pipe/p_inlines.h"
  43 #include "util/u_format.h"
  44 #include "util/u_math.h"
  45 #include "util/u_memory.h"
  46 #include "softpipe/sp_winsys.h"
  47 #include "st_winsys.h"
  48
  49
  50 struct st_softpipe_buffer
  51 {
  52    struct pipe_buffer base;
  53    boolean userBuffer;  /** Is this a user-space buffer? */
  54    void *data;
  55    void *mapped;
  56 };
  57
  58
  59 /** Cast wrapper */
  60 static INLINE struct st_softpipe_buffer *
  61 st_softpipe_buffer( struct pipe_buffer *buf )
  62 {
  63    return (struct st_softpipe_buffer *)buf;
  64 }
  65
  66
  67 static void *
  68 st_softpipe_buffer_map(struct pipe_winsys *winsys,
  69                        struct pipe_buffer *buf,
  70                        unsigned flags)
  71 {
  72    struct st_softpipe_buffer *st_softpipe_buf = st_softpipe_buffer(buf);
  73    st_softpipe_buf->mapped = st_softpipe_buf->data;
  74    return st_softpipe_buf->mapped;
  75 }
  76
  77
  78 static void
  79 st_softpipe_buffer_unmap(struct pipe_winsys *winsys,
  80                          struct pipe_buffer *buf)
  81 {
  82    struct st_softpipe_buffer *st_softpipe_buf = st_softpipe_buffer(buf);
  83    st_softpipe_buf->mapped = NULL;
  84 }
  85
  86
  87 static void
  88 st_softpipe_buffer_destroy(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    pipe_reference_init(&buffer->base.reference, 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    pipe_reference_init(&buffer->base.reference, 1);
 153    buffer->base.size = bytes;
 154    buffer->userBuffer = TRUE;
 155    buffer->data = ptr;
 156
 157    return &buffer->base;
 158 }
 159
 160
 161 static struct pipe_buffer *
 162 st_softpipe_surface_buffer_create(struct pipe_winsys *winsys,
 163                                   unsigned width, unsigned height,
 164                                   enum pipe_format format,
 165                                   unsigned usage,
 166                                   unsigned tex_usage,
 167                                   unsigned *stride)
 168 {
 169    const unsigned alignment = 64;
 170    unsigned nblocksy;
 171
 172    nblocksy = util_format_get_nblocksy(format, height);
 173    *stride = align(util_format_get_stride(format, width), alignment);
 174
 175    return winsys->buffer_create(winsys, alignment,
 176                                 usage,
 177                                 *stride * nblocksy);
 178 }
 179
 180
 181 static void
 182 st_softpipe_fence_reference(struct pipe_winsys *winsys,
 183                             struct pipe_fence_handle **ptr,
 184                             struct pipe_fence_handle *fence)
 185 {
 186 }
 187
 188
 189 static int
 190 st_softpipe_fence_signalled(struct pipe_winsys *winsys,
 191                             struct pipe_fence_handle *fence,
 192                             unsigned flag)
 193 {
 194    return 0;
 195 }
 196
 197
 198 static int
 199 st_softpipe_fence_finish(struct pipe_winsys *winsys,
 200                          struct pipe_fence_handle *fence,
 201                          unsigned flag)
 202 {
 203    return 0;
 204 }
 205
 206
 207 static void
 208 st_softpipe_destroy(struct pipe_winsys *winsys)
 209 {
 210    FREE(winsys);
 211 }
 212
 213
 214 static struct pipe_screen *
 215 st_softpipe_screen_create(void)
 216 {
 217    static struct pipe_winsys *winsys;
 218    struct pipe_screen *screen;
 219
 220    winsys = CALLOC_STRUCT(pipe_winsys);
 221    if(!winsys)
 222       return NULL;
 223
 224    winsys->destroy = st_softpipe_destroy;
 225
 226    winsys->buffer_create = st_softpipe_buffer_create;
 227    winsys->user_buffer_create = st_softpipe_user_buffer_create;
 228    winsys->buffer_map = st_softpipe_buffer_map;
 229    winsys->buffer_unmap = st_softpipe_buffer_unmap;
 230    winsys->buffer_destroy = st_softpipe_buffer_destroy;
 231
 232    winsys->surface_buffer_create = st_softpipe_surface_buffer_create;
 233
 234    winsys->fence_reference = st_softpipe_fence_reference;
 235    winsys->fence_signalled = st_softpipe_fence_signalled;
 236    winsys->fence_finish = st_softpipe_fence_finish;
 237
 238    winsys->flush_frontbuffer = st_softpipe_flush_frontbuffer;
 239    winsys->get_name = st_softpipe_get_name;
 240
 241    screen = softpipe_create_screen(winsys);
 242    if(!screen)
 243       st_softpipe_destroy(winsys);
 244
 245    return screen;
 246 }
 247
 248
 249 static struct pipe_context *
 250 st_softpipe_context_create(struct pipe_screen *screen)
 251 {
 252    return softpipe_create(screen);
 253 }
 254
 255
 256 const struct st_winsys st_softpipe_winsys = {
 257    &st_softpipe_screen_create,
 258    &st_softpipe_context_create,
 259 };