src/gallium/winsys/xlib/xlib_cell.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  * Authors:
  31  *   Keith Whitwell
  32  *   Brian Paul
  33  */
  34
  35 #include "xlib.h"
  36
  37 #ifdef GALLIUM_CELL
  38
  39 #include "xm_api.h"
  40
  41 #undef ASSERT
  42 #undef Elements
  43
  44 #include "pipe/internal/p_winsys_screen.h"
  45 #include "pipe/p_format.h"
  46 #include "pipe/p_context.h"
  47 #include "pipe/p_inlines.h"
  48 #include "util/u_math.h"
  49 #include "util/u_memory.h"
  50
  51 #include "cell/ppu/cell_context.h"
  52 #include "cell/ppu/cell_screen.h"
  53 #include "cell/ppu/cell_winsys.h"
  54
  55
  56 /**
  57  * Subclass of pipe_buffer for Xlib winsys.
  58  * Low-level OS/window system memory buffer
  59  */
  60 struct xm_buffer
  61 {
  62    struct pipe_buffer base;
  63    boolean userBuffer;  /** Is this a user-space buffer? */
  64    void *data;
  65    void *mapped;
  66
  67    XImage *tempImage;
  68    int shm;
  69 };
  70
  71
  72 /**
  73  * Subclass of pipe_winsys for Xlib winsys
  74  */
  75 struct xmesa_pipe_winsys
  76 {
  77    struct pipe_winsys base;
  78 };
  79
  80
  81
  82 /** Cast wrapper */
  83 static INLINE struct xm_buffer *
  84 xm_buffer( struct pipe_buffer *buf )
  85 {
  86    return (struct xm_buffer *)buf;
  87 }
  88
  89
  90 /* Most callbacks map direcly onto dri_bufmgr operations:
  91  */
  92 static void *
  93 xm_buffer_map(struct pipe_winsys *pws, struct pipe_buffer *buf,
  94               unsigned flags)
  95 {
  96    struct xm_buffer *xm_buf = xm_buffer(buf);
  97    xm_buf->mapped = xm_buf->data;
  98    return xm_buf->mapped;
  99 }
 100
 101 static void
 102 xm_buffer_unmap(struct pipe_winsys *pws, struct pipe_buffer *buf)
 103 {
 104    struct xm_buffer *xm_buf = xm_buffer(buf);
 105    xm_buf->mapped = NULL;
 106 }
 107
 108 static void
 109 xm_buffer_destroy(struct pipe_winsys *pws,
 110                   struct pipe_buffer *buf)
 111 {
 112    struct xm_buffer *oldBuf = xm_buffer(buf);
 113
 114    if (oldBuf->data) {
 115       {
 116          if (!oldBuf->userBuffer) {
 117             align_free(oldBuf->data);
 118          }
 119       }
 120
 121       oldBuf->data = NULL;
 122    }
 123
 124    free(oldBuf);
 125 }
 126
 127
 128 /**
 129  * For Cell.  Basically, rearrange the pixels/quads from this layout:
 130  *  +--+--+--+--+
 131  *  |p0|p1|p2|p3|....
 132  *  +--+--+--+--+
 133  *
 134  * to this layout:
 135  *  +--+--+
 136  *  |p0|p1|....
 137  *  +--+--+
 138  *  |p2|p3|
 139  *  +--+--+
 140  */
 141 static void
 142 twiddle_tile(const uint *tileIn, uint *tileOut)
 143 {
 144    int y, x;
 145
 146    for (y = 0; y < TILE_SIZE; y+=2) {
 147       for (x = 0; x < TILE_SIZE; x+=2) {
 148          int k = 4 * (y/2 * TILE_SIZE/2 + x/2);
 149          tileOut[y * TILE_SIZE + (x + 0)] = tileIn[k];
 150          tileOut[y * TILE_SIZE + (x + 1)] = tileIn[k+1];
 151          tileOut[(y + 1) * TILE_SIZE + (x + 0)] = tileIn[k+2];
 152          tileOut[(y + 1) * TILE_SIZE + (x + 1)] = tileIn[k+3];
 153       }
 154    }
 155 }
 156
 157
 158
 159 /**
 160  * Display a surface that's in a tiled configuration.  That is, all the
 161  * pixels for a TILE_SIZExTILE_SIZE block are contiguous in memory.
 162  */
 163 static void
 164 xlib_cell_display_surface(struct xmesa_buffer *b, struct pipe_surface *surf)
 165 {
 166    XImage *ximage;
 167    struct xm_buffer *xm_buf = xm_buffer(surf->buffer);
 168    const uint tilesPerRow = (surf->width + TILE_SIZE - 1) / TILE_SIZE;
 169    uint x, y;
 170
 171    ximage = b->tempImage;
 172
 173    /* check that the XImage has been previously initialized */
 174    assert(ximage->format);
 175    assert(ximage->bitmap_unit);
 176
 177    /* update XImage's fields */
 178    ximage->width = TILE_SIZE;
 179    ximage->height = TILE_SIZE;
 180    ximage->bytes_per_line = TILE_SIZE * 4;
 181
 182    for (y = 0; y < surf->height; y += TILE_SIZE) {
 183       for (x = 0; x < surf->width; x += TILE_SIZE) {
 184          uint tmpTile[TILE_SIZE * TILE_SIZE];
 185          int tx = x / TILE_SIZE;
 186          int ty = y / TILE_SIZE;
 187          int offset = ty * tilesPerRow + tx;
 188          int w = TILE_SIZE;
 189          int h = TILE_SIZE;
 190
 191          if (y + h > surf->height)
 192             h = surf->height - y;
 193          if (x + w > surf->width)
 194             w = surf->width - x;
 195
 196          /* offset in pixels */
 197          offset *= TILE_SIZE * TILE_SIZE;
 198
 199          /* twiddle from ximage buffer to temp tile */
 200          twiddle_tile((uint *) xm_buf->data + offset, tmpTile);
 201          /* display temp tile data */
 202          ximage->data = (char *) tmpTile;
 203          XPutImage(b->xm_visual->display, b->drawable, b->gc,
 204                    ximage, 0, 0, x, y, w, h);
 205       }
 206    }
 207 }
 208
 209
 210
 211
 212
 213 static void
 214 xm_flush_frontbuffer(struct pipe_winsys *pws,
 215                      struct pipe_surface *surf,
 216                      void *context_private)
 217 {
 218    /*
 219     * The front color buffer is actually just another XImage buffer.
 220     * This function copies that XImage to the actual X Window.
 221     */
 222    XMesaContext xmctx = (XMesaContext) context_private;
 223    xlib_cell_display_surface(xmctx->xm_buffer, surf);
 224 }
 225
 226
 227
 228 static const char *
 229 xm_get_name(struct pipe_winsys *pws)
 230 {
 231    return "Xlib/Cell";
 232 }
 233
 234
 235 static struct pipe_buffer *
 236 xm_buffer_create(struct pipe_winsys *pws,
 237                  unsigned alignment,
 238                  unsigned usage,
 239                  unsigned size)
 240 {
 241    struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
 242
 243    buffer->base.refcount = 1;
 244    buffer->base.alignment = alignment;
 245    buffer->base.usage = usage;
 246    buffer->base.size = size;
 247
 248
 249    if (buffer->data == NULL) {
 250       buffer->shm = 0;
 251
 252       /* align to 16-byte multiple for Cell */
 253       buffer->data = align_malloc(size, max(alignment, 16));
 254    }
 255
 256    return &buffer->base;
 257 }
 258
 259
 260 /**
 261  * Create buffer which wraps user-space data.
 262  */
 263 static struct pipe_buffer *
 264 xm_user_buffer_create(struct pipe_winsys *pws, void *ptr, unsigned bytes)
 265 {
 266    struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
 267    buffer->base.refcount = 1;
 268    buffer->base.size = bytes;
 269    buffer->userBuffer = TRUE;
 270    buffer->data = ptr;
 271    buffer->shm = 0;
 272
 273    return &buffer->base;
 274 }
 275
 276
 277
 278 /**
 279  * Round n up to next multiple.
 280  */
 281 static INLINE unsigned
 282 round_up(unsigned n, unsigned multiple)
 283 {
 284    return (n + multiple - 1) & ~(multiple - 1);
 285 }
 286
 287 static struct pipe_buffer *
 288 xm_surface_buffer_create(struct pipe_winsys *winsys,
 289                          unsigned width, unsigned height,
 290                          enum pipe_format format,
 291                          unsigned usage,
 292                          unsigned *stride)
 293 {
 294    const unsigned alignment = 64;
 295    struct pipe_format_block block;
 296    unsigned nblocksx, nblocksy;
 297
 298    pf_get_block(format, &block);
 299    nblocksx = pf_get_nblocksx(&block, width);
 300    nblocksy = pf_get_nblocksy(&block, height);
 301    *stride = round_up(nblocksx * block.size, alignment);
 302
 303    return winsys->buffer_create(winsys, alignment,
 304                                 usage,
 305                                 /* XXX a bit of a hack */
 306                                 *stride * round_up(nblocksy, TILE_SIZE));
 307 }
 308
 309
 310 /*
 311  * Fence functions - basically nothing to do, as we don't create any actual
 312  * fence objects.
 313  */
 314
 315 static void
 316 xm_fence_reference(struct pipe_winsys *sws, struct pipe_fence_handle **ptr,
 317                    struct pipe_fence_handle *fence)
 318 {
 319 }
 320
 321
 322 static int
 323 xm_fence_signalled(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
 324                    unsigned flag)
 325 {
 326    return 0;
 327 }
 328
 329
 330 static int
 331 xm_fence_finish(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
 332                 unsigned flag)
 333 {
 334    return 0;
 335 }
 336
 337
 338
 339 static struct pipe_winsys *
 340 xlib_create_cell_winsys( void )
 341 {
 342    static struct xmesa_pipe_winsys *ws = NULL;
 343
 344    if (!ws) {
 345       ws = CALLOC_STRUCT(xmesa_pipe_winsys);
 346
 347       /* Fill in this struct with callbacks that pipe will need to
 348        * communicate with the window system, buffer manager, etc.
 349        */
 350       ws->base.buffer_create = xm_buffer_create;
 351       ws->base.user_buffer_create = xm_user_buffer_create;
 352       ws->base.buffer_map = xm_buffer_map;
 353       ws->base.buffer_unmap = xm_buffer_unmap;
 354       ws->base.buffer_destroy = xm_buffer_destroy;
 355
 356       ws->base.surface_buffer_create = xm_surface_buffer_create;
 357
 358       ws->base.fence_reference = xm_fence_reference;
 359       ws->base.fence_signalled = xm_fence_signalled;
 360       ws->base.fence_finish = xm_fence_finish;
 361
 362       ws->base.flush_frontbuffer = xm_flush_frontbuffer;
 363       ws->base.get_name = xm_get_name;
 364    }
 365
 366    return &ws->base;
 367 }
 368
 369
 370 static struct pipe_screen *
 371 xlib_create_cell_screen( struct pipe_winsys *pws )
 372 {
 373    struct pipe_winsys *winsys;
 374    struct pipe_screen *screen;
 375
 376    winsys = xlib_create_cell_winsys();
 377    if (winsys == NULL)
 378       return NULL;
 379
 380    screen = cell_create_screen(winsys);
 381    if (screen == NULL)
 382       goto fail;
 383
 384    return screen;
 385
 386 fail:
 387    if (winsys)
 388       winsys->destroy( winsys );
 389
 390    return NULL;
 391 }
 392
 393
 394 static struct pipe_context *
 395 xlib_create_cell_context( struct pipe_screen *screen,
 396                           void *priv )
 397 {
 398    struct pipe_context *pipe;
 399
 400
 401    /* This takes a cell_winsys pointer, but probably that should be
 402     * created and stored at screen creation, not context creation.
 403     *
 404     * The actual cell_winsys value isn't used for anything, so just
 405     * passing NULL for now.
 406     */
 407    pipe = cell_create_context( screen, NULL);
 408    if (pipe == NULL)
 409       goto fail;
 410
 411    pipe->priv = priv;
 412
 413    return pipe;
 414
 415 fail:
 416    return NULL;
 417 }
 418
 419 struct xm_driver xlib_cell_driver =
 420 {
 421    .create_pipe_screen = xlib_create_cell_screen,
 422    .create_pipe_context = xlib_create_cell_context,
 423    .display_surface = xlib_cell_display_surface,
 424 };
 425
 426 #else
 427
 428 struct xm_driver xlib_cell_driver =
 429 {
 430    .create_pipe_screen = NULL,
 431    .create_pipe_context = NULL,
 432    .display_surface = NULL,
 433 };
 434
 435 #endif