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 #include "cell/ppu/cell_texture.h"
  55
  56
  57 /**
  58  * Subclass of pipe_buffer for Xlib winsys.
  59  * Low-level OS/window system memory buffer
  60  */
  61 struct xm_buffer
  62 {
  63    struct pipe_buffer base;
  64    boolean userBuffer;  /** Is this a user-space buffer? */
  65    void *data;
  66    void *mapped;
  67
  68    XImage *tempImage;
  69    int shm;
  70 };
  71
  72
  73 /**
  74  * Subclass of pipe_winsys for Xlib winsys
  75  */
  76 struct xmesa_pipe_winsys
  77 {
  78    struct pipe_winsys base;
  79 };
  80
  81
  82
  83 /** Cast wrapper */
  84 static INLINE struct xm_buffer *
  85 xm_buffer( struct pipe_buffer *buf )
  86 {
  87    return (struct xm_buffer *)buf;
  88 }
  89
  90
  91 /* Most callbacks map direcly onto dri_bufmgr operations:
  92  */
  93 static void *
  94 xm_buffer_map(struct pipe_winsys *pws, struct pipe_buffer *buf,
  95               unsigned flags)
  96 {
  97    struct xm_buffer *xm_buf = xm_buffer(buf);
  98    xm_buf->mapped = xm_buf->data;
  99    return xm_buf->mapped;
 100 }
 101
 102 static void
 103 xm_buffer_unmap(struct pipe_winsys *pws, struct pipe_buffer *buf)
 104 {
 105    struct xm_buffer *xm_buf = xm_buffer(buf);
 106    xm_buf->mapped = NULL;
 107 }
 108
 109 static void
 110 xm_buffer_destroy(struct pipe_winsys *pws,
 111                   struct pipe_buffer *buf)
 112 {
 113    struct xm_buffer *oldBuf = xm_buffer(buf);
 114
 115    if (oldBuf->data) {
 116       {
 117          if (!oldBuf->userBuffer) {
 118             align_free(oldBuf->data);
 119          }
 120       }
 121
 122       oldBuf->data = NULL;
 123    }
 124
 125    free(oldBuf);
 126 }
 127
 128
 129 /**
 130  * For Cell.  Basically, rearrange the pixels/quads from this layout:
 131  *  +--+--+--+--+
 132  *  |p0|p1|p2|p3|....
 133  *  +--+--+--+--+
 134  *
 135  * to this layout:
 136  *  +--+--+
 137  *  |p0|p1|....
 138  *  +--+--+
 139  *  |p2|p3|
 140  *  +--+--+
 141  */
 142 static void
 143 twiddle_tile(const uint *tileIn, uint *tileOut)
 144 {
 145    int y, x;
 146
 147    for (y = 0; y < TILE_SIZE; y+=2) {
 148       for (x = 0; x < TILE_SIZE; x+=2) {
 149          int k = 4 * (y/2 * TILE_SIZE/2 + x/2);
 150          tileOut[y * TILE_SIZE + (x + 0)] = tileIn[k];
 151          tileOut[y * TILE_SIZE + (x + 1)] = tileIn[k+1];
 152          tileOut[(y + 1) * TILE_SIZE + (x + 0)] = tileIn[k+2];
 153          tileOut[(y + 1) * TILE_SIZE + (x + 1)] = tileIn[k+3];
 154       }
 155    }
 156 }
 157
 158
 159
 160 /**
 161  * Display a surface that's in a tiled configuration.  That is, all the
 162  * pixels for a TILE_SIZExTILE_SIZE block are contiguous in memory.
 163  */
 164 static void
 165 xlib_cell_display_surface(struct xmesa_buffer *b, struct pipe_surface *surf)
 166 {
 167    XImage *ximage;
 168    struct xm_buffer *xm_buf = xm_buffer(
 169       cell_texture(surf->texture)->buffer);
 170    const uint tilesPerRow = (surf->width + TILE_SIZE - 1) / TILE_SIZE;
 171    uint x, y;
 172
 173    ximage = b->tempImage;
 174
 175    /* check that the XImage has been previously initialized */
 176    assert(ximage->format);
 177    assert(ximage->bitmap_unit);
 178
 179    /* update XImage's fields */
 180    ximage->width = TILE_SIZE;
 181    ximage->height = TILE_SIZE;
 182    ximage->bytes_per_line = TILE_SIZE * 4;
 183
 184    for (y = 0; y < surf->height; y += TILE_SIZE) {
 185       for (x = 0; x < surf->width; x += TILE_SIZE) {
 186          uint tmpTile[TILE_SIZE * TILE_SIZE];
 187          int tx = x / TILE_SIZE;
 188          int ty = y / TILE_SIZE;
 189          int offset = ty * tilesPerRow + tx;
 190          int w = TILE_SIZE;
 191          int h = TILE_SIZE;
 192
 193          if (y + h > surf->height)
 194             h = surf->height - y;
 195          if (x + w > surf->width)
 196             w = surf->width - x;
 197
 198          /* offset in pixels */
 199          offset *= TILE_SIZE * TILE_SIZE;
 200
 201          /* twiddle from ximage buffer to temp tile */
 202          twiddle_tile((uint *) xm_buf->data + offset, tmpTile);
 203          /* display temp tile data */
 204          ximage->data = (char *) tmpTile;
 205          XPutImage(b->xm_visual->display, b->drawable, b->gc,
 206                    ximage, 0, 0, x, y, w, h);
 207       }
 208    }
 209 }
 210
 211
 212
 213
 214
 215 static void
 216 xm_flush_frontbuffer(struct pipe_winsys *pws,
 217                      struct pipe_surface *surf,
 218                      void *context_private)
 219 {
 220    /*
 221     * The front color buffer is actually just another XImage buffer.
 222     * This function copies that XImage to the actual X Window.
 223     */
 224    XMesaContext xmctx = (XMesaContext) context_private;
 225    xlib_cell_display_surface(xmctx->xm_buffer, surf);
 226 }
 227
 228
 229
 230 static const char *
 231 xm_get_name(struct pipe_winsys *pws)
 232 {
 233    return "Xlib/Cell";
 234 }
 235
 236
 237 static struct pipe_buffer *
 238 xm_buffer_create(struct pipe_winsys *pws,
 239                  unsigned alignment,
 240                  unsigned usage,
 241                  unsigned size)
 242 {
 243    struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
 244
 245    buffer->base.refcount = 1;
 246    buffer->base.alignment = alignment;
 247    buffer->base.usage = usage;
 248    buffer->base.size = size;
 249
 250
 251    if (buffer->data == NULL) {
 252       buffer->shm = 0;
 253
 254       /* align to 16-byte multiple for Cell */
 255       buffer->data = align_malloc(size, max(alignment, 16));
 256    }
 257
 258    return &buffer->base;
 259 }
 260
 261
 262 /**
 263  * Create buffer which wraps user-space data.
 264  */
 265 static struct pipe_buffer *
 266 xm_user_buffer_create(struct pipe_winsys *pws, void *ptr, unsigned bytes)
 267 {
 268    struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
 269    buffer->base.refcount = 1;
 270    buffer->base.size = bytes;
 271    buffer->userBuffer = TRUE;
 272    buffer->data = ptr;
 273    buffer->shm = 0;
 274
 275    return &buffer->base;
 276 }
 277
 278
 279
 280 /**
 281  * Round n up to next multiple.
 282  */
 283 static INLINE unsigned
 284 round_up(unsigned n, unsigned multiple)
 285 {
 286    return (n + multiple - 1) & ~(multiple - 1);
 287 }
 288
 289 static struct pipe_buffer *
 290 xm_surface_buffer_create(struct pipe_winsys *winsys,
 291                          unsigned width, unsigned height,
 292                          enum pipe_format format,
 293                          unsigned usage,
 294                          unsigned *stride)
 295 {
 296    const unsigned alignment = 64;
 297    struct pipe_format_block block;
 298    unsigned nblocksx, nblocksy;
 299
 300    pf_get_block(format, &block);
 301    nblocksx = pf_get_nblocksx(&block, width);
 302    nblocksy = pf_get_nblocksy(&block, height);
 303    *stride = round_up(nblocksx * block.size, alignment);
 304
 305    return winsys->buffer_create(winsys, alignment,
 306                                 usage,
 307                                 /* XXX a bit of a hack */
 308                                 *stride * round_up(nblocksy, TILE_SIZE));
 309 }
 310
 311
 312 /*
 313  * Fence functions - basically nothing to do, as we don't create any actual
 314  * fence objects.
 315  */
 316
 317 static void
 318 xm_fence_reference(struct pipe_winsys *sws, struct pipe_fence_handle **ptr,
 319                    struct pipe_fence_handle *fence)
 320 {
 321 }
 322
 323
 324 static int
 325 xm_fence_signalled(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
 326                    unsigned flag)
 327 {
 328    return 0;
 329 }
 330
 331
 332 static int
 333 xm_fence_finish(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
 334                 unsigned flag)
 335 {
 336    return 0;
 337 }
 338
 339
 340
 341 static struct pipe_winsys *
 342 xlib_create_cell_winsys( void )
 343 {
 344    static struct xmesa_pipe_winsys *ws = NULL;
 345
 346    if (!ws) {
 347       ws = CALLOC_STRUCT(xmesa_pipe_winsys);
 348
 349       /* Fill in this struct with callbacks that pipe will need to
 350        * communicate with the window system, buffer manager, etc.
 351        */
 352       ws->base.buffer_create = xm_buffer_create;
 353       ws->base.user_buffer_create = xm_user_buffer_create;
 354       ws->base.buffer_map = xm_buffer_map;
 355       ws->base.buffer_unmap = xm_buffer_unmap;
 356       ws->base.buffer_destroy = xm_buffer_destroy;
 357
 358       ws->base.surface_buffer_create = xm_surface_buffer_create;
 359
 360       ws->base.fence_reference = xm_fence_reference;
 361       ws->base.fence_signalled = xm_fence_signalled;
 362       ws->base.fence_finish = xm_fence_finish;
 363
 364       ws->base.flush_frontbuffer = xm_flush_frontbuffer;
 365       ws->base.get_name = xm_get_name;
 366    }
 367
 368    return &ws->base;
 369 }
 370
 371
 372 static struct pipe_screen *
 373 xlib_create_cell_screen( struct pipe_winsys *pws )
 374 {
 375    struct pipe_winsys *winsys;
 376    struct pipe_screen *screen;
 377
 378    winsys = xlib_create_cell_winsys();
 379    if (winsys == NULL)
 380       return NULL;
 381
 382    screen = cell_create_screen(winsys);
 383    if (screen == NULL)
 384       goto fail;
 385
 386    return screen;
 387
 388 fail:
 389    if (winsys)
 390       winsys->destroy( winsys );
 391
 392    return NULL;
 393 }
 394
 395
 396 static struct pipe_context *
 397 xlib_create_cell_context( struct pipe_screen *screen,
 398                           void *priv )
 399 {
 400    struct pipe_context *pipe;
 401
 402
 403    /* This takes a cell_winsys pointer, but probably that should be
 404     * created and stored at screen creation, not context creation.
 405     *
 406     * The actual cell_winsys value isn't used for anything, so just
 407     * passing NULL for now.
 408     */
 409    pipe = cell_create_context( screen, NULL);
 410    if (pipe == NULL)
 411       goto fail;
 412
 413    pipe->priv = priv;
 414
 415    return pipe;
 416
 417 fail:
 418    return NULL;
 419 }
 420
 421 struct xm_driver xlib_cell_driver =
 422 {
 423    .create_pipe_screen = xlib_create_cell_screen,
 424    .create_pipe_context = xlib_create_cell_context,
 425    .display_surface = xlib_cell_display_surface,
 426 };
 427
 428 #else
 429
 430 struct xm_driver xlib_cell_driver =
 431 {
 432    .create_pipe_screen = NULL,
 433    .create_pipe_context = NULL,
 434    .display_surface = NULL,
 435 };
 436
 437 #endif