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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  13  *
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  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
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  22  * The above copyright notice and this permission notice (including the
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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_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 struct pipe_buffer *
 172 st_softpipe_surface_buffer_create(struct pipe_winsys *winsys,
 173                                   unsigned width, unsigned height,
 174                                   enum pipe_format format,
 175                                   unsigned usage,
 176                                   unsigned *stride)
 177 {
 178    const unsigned alignment = 64;
 179    struct pipe_format_block block;
 180    unsigned nblocksx, nblocksy;
 181
 182    pf_get_block(format, &block);
 183    nblocksx = pf_get_nblocksx(&block, width);
 184    nblocksy = pf_get_nblocksy(&block, height);
 185    *stride = round_up(nblocksx * block.size, alignment);
 186
 187    return winsys->buffer_create(winsys, alignment,
 188                                 usage,
 189                                 *stride * nblocksy);
 190 }
 191
 192
 193 static void
 194 st_softpipe_fence_reference(struct pipe_winsys *winsys,
 195                             struct pipe_fence_handle **ptr,
 196                             struct pipe_fence_handle *fence)
 197 {
 198 }
 199
 200
 201 static int
 202 st_softpipe_fence_signalled(struct pipe_winsys *winsys,
 203                             struct pipe_fence_handle *fence,
 204                             unsigned flag)
 205 {
 206    return 0;
 207 }
 208
 209
 210 static int
 211 st_softpipe_fence_finish(struct pipe_winsys *winsys,
 212                          struct pipe_fence_handle *fence,
 213                          unsigned flag)
 214 {
 215    return 0;
 216 }
 217
 218
 219 static void
 220 st_softpipe_destroy(struct pipe_winsys *winsys)
 221 {
 222    FREE(winsys);
 223 }
 224
 225
 226 static struct pipe_screen *
 227 st_softpipe_screen_create(void)
 228 {
 229    static struct pipe_winsys *winsys;
 230    struct pipe_screen *screen;
 231
 232    winsys = CALLOC_STRUCT(pipe_winsys);
 233    if(!winsys)
 234       return NULL;
 235
 236    winsys->destroy = st_softpipe_destroy;
 237
 238    winsys->buffer_create = st_softpipe_buffer_create;
 239    winsys->user_buffer_create = st_softpipe_user_buffer_create;
 240    winsys->buffer_map = st_softpipe_buffer_map;
 241    winsys->buffer_unmap = st_softpipe_buffer_unmap;
 242    winsys->buffer_destroy = st_softpipe_buffer_destroy;
 243
 244    winsys->surface_buffer_create = st_softpipe_surface_buffer_create;
 245
 246    winsys->fence_reference = st_softpipe_fence_reference;
 247    winsys->fence_signalled = st_softpipe_fence_signalled;
 248    winsys->fence_finish = st_softpipe_fence_finish;
 249
 250    winsys->flush_frontbuffer = st_softpipe_flush_frontbuffer;
 251    winsys->get_name = st_softpipe_get_name;
 252
 253    screen = softpipe_create_screen(winsys);
 254    if(!screen)
 255       st_softpipe_destroy(winsys);
 256
 257    return screen;
 258 }
 259
 260
 261 static struct pipe_context *
 262 st_softpipe_context_create(struct pipe_screen *screen)
 263 {
 264    return softpipe_create(screen, screen->winsys, NULL);
 265 }
 266
 267
 268 const struct st_winsys st_softpipe_winsys = {
 269    &st_softpipe_screen_create,
 270    &st_softpipe_context_create,
 271 };