src/gallium/state_trackers/dri/drisw.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009, VMware, Inc.
   4  * All Rights Reserved.
   5  * Copyright 2010 George Sapountzis <gsapountzis@gmail.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 /* TODO:
  30  *
  31  * xshm / EGLImage:
  32  *
  33  * Allow the loaders to use the XSHM extension. It probably requires callbacks
  34  * for createImage/destroyImage similar to DRI2 getBuffers.
  35  */
  36
  37 /* XXX: Temporary hack, until we get rid of drisw_create_screen() */
  38 #define DRI_TARGET
  39
  40 #include "util/u_format.h"
  41 #include "util/u_memory.h"
  42 #include "util/u_inlines.h"
  43 #include "util/u_box.h"
  44 #include "pipe/p_context.h"
  45 #include "state_tracker/drisw_api.h"
  46 #include "state_tracker/st_context.h"
  47
  48 #include "dri_screen.h"
  49 #include "dri_context.h"
  50 #include "dri_drawable.h"
  51 #include "dri_query_renderer.h"
  52
  53 DEBUG_GET_ONCE_BOOL_OPTION(swrast_no_present, "SWRAST_NO_PRESENT", FALSE);
  54 static boolean swrast_no_present = FALSE;
  55
  56 static inline void
  57 get_drawable_info(__DRIdrawable *dPriv, int *x, int *y, int *w, int *h)
  58 {
  59    __DRIscreen *sPriv = dPriv->driScreenPriv;
  60    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  61
  62    loader->getDrawableInfo(dPriv,
  63                            x, y, w, h,
  64                            dPriv->loaderPrivate);
  65 }
  66
  67 static inline void
  68 put_image(__DRIdrawable *dPriv, void *data, unsigned width, unsigned height)
  69 {
  70    __DRIscreen *sPriv = dPriv->driScreenPriv;
  71    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  72
  73    loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
  74                     0, 0, width, height,
  75                     data, dPriv->loaderPrivate);
  76 }
  77
  78 static inline void
  79 put_image2(__DRIdrawable *dPriv, void *data, int x, int y,
  80            unsigned width, unsigned height, unsigned stride)
  81 {
  82    __DRIscreen *sPriv = dPriv->driScreenPriv;
  83    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  84
  85    loader->putImage2(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
  86                      x, y, width, height, stride,
  87                      data, dPriv->loaderPrivate);
  88 }
  89
  90 static inline void
  91 get_image(__DRIdrawable *dPriv, int x, int y, int width, int height, void *data)
  92 {
  93    __DRIscreen *sPriv = dPriv->driScreenPriv;
  94    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  95
  96    loader->getImage(dPriv,
  97                     x, y, width, height,
  98                     data, dPriv->loaderPrivate);
  99 }
 100
 101 static inline void
 102 get_image2(__DRIdrawable *dPriv, int x, int y, int width, int height, int stride, void *data)
 103 {
 104    __DRIscreen *sPriv = dPriv->driScreenPriv;
 105    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
 106
 107    /* getImage2 support is only in version 3 or newer */
 108    if (loader->base.version < 3)
 109       return;
 110
 111    loader->getImage2(dPriv,
 112                      x, y, width, height, stride,
 113                      data, dPriv->loaderPrivate);
 114 }
 115
 116 static void
 117 drisw_update_drawable_info(struct dri_drawable *drawable)
 118 {
 119    __DRIdrawable *dPriv = drawable->dPriv;
 120    int x, y;
 121
 122    get_drawable_info(dPriv, &x, &y, &dPriv->w, &dPriv->h);
 123 }
 124
 125 static void
 126 drisw_get_image(struct dri_drawable *drawable,
 127                 int x, int y, unsigned width, unsigned height, unsigned stride,
 128                 void *data)
 129 {
 130    __DRIdrawable *dPriv = drawable->dPriv;
 131    int draw_x, draw_y, draw_w, draw_h;
 132
 133    get_drawable_info(dPriv, &draw_x, &draw_y, &draw_w, &draw_h);
 134    get_image2(dPriv, x, y, draw_w, draw_h, stride, data);
 135 }
 136
 137 static void
 138 drisw_put_image(struct dri_drawable *drawable,
 139                 void *data, unsigned width, unsigned height)
 140 {
 141    __DRIdrawable *dPriv = drawable->dPriv;
 142
 143    put_image(dPriv, data, width, height);
 144 }
 145
 146 static void
 147 drisw_put_image2(struct dri_drawable *drawable,
 148                  void *data, int x, int y, unsigned width, unsigned height,
 149                  unsigned stride)
 150 {
 151    __DRIdrawable *dPriv = drawable->dPriv;
 152
 153    put_image2(dPriv, data, x, y, width, height, stride);
 154 }
 155
 156 static inline void
 157 drisw_present_texture(__DRIdrawable *dPriv,
 158                       struct pipe_resource *ptex, struct pipe_box *sub_box)
 159 {
 160    struct dri_drawable *drawable = dri_drawable(dPriv);
 161    struct dri_screen *screen = dri_screen(drawable->sPriv);
 162
 163    if (swrast_no_present)
 164       return;
 165
 166    screen->base.screen->flush_frontbuffer(screen->base.screen, ptex, 0, 0, drawable, sub_box);
 167 }
 168
 169 static inline void
 170 drisw_invalidate_drawable(__DRIdrawable *dPriv)
 171 {
 172    struct dri_drawable *drawable = dri_drawable(dPriv);
 173
 174    drawable->texture_stamp = dPriv->lastStamp - 1;
 175
 176    p_atomic_inc(&drawable->base.stamp);
 177 }
 178
 179 static inline void
 180 drisw_copy_to_front(__DRIdrawable * dPriv,
 181                     struct pipe_resource *ptex)
 182 {
 183    drisw_present_texture(dPriv, ptex, NULL);
 184
 185    drisw_invalidate_drawable(dPriv);
 186 }
 187
 188 /*
 189  * Backend functions for st_framebuffer interface and swap_buffers.
 190  */
 191
 192 static void
 193 drisw_swap_buffers(__DRIdrawable *dPriv)
 194 {
 195    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 196    struct dri_drawable *drawable = dri_drawable(dPriv);
 197    struct pipe_resource *ptex;
 198
 199    if (!ctx)
 200       return;
 201
 202    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 203
 204    if (ptex) {
 205       if (ctx->pp)
 206          pp_run(ctx->pp, ptex, ptex, drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL]);
 207
 208       ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
 209
 210       drisw_copy_to_front(dPriv, ptex);
 211    }
 212 }
 213
 214 static void
 215 drisw_copy_sub_buffer(__DRIdrawable *dPriv, int x, int y,
 216                       int w, int h)
 217 {
 218    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 219    struct dri_drawable *drawable = dri_drawable(dPriv);
 220    struct pipe_resource *ptex;
 221    struct pipe_box box;
 222    if (!ctx)
 223       return;
 224
 225    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 226
 227    if (ptex) {
 228       if (ctx->pp && drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL])
 229          pp_run(ctx->pp, ptex, ptex, drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL]);
 230
 231       ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
 232
 233       u_box_2d(x, dPriv->h - y - h, w, h, &box);
 234       drisw_present_texture(dPriv, ptex, &box);
 235    }
 236 }
 237
 238 static void
 239 drisw_flush_frontbuffer(struct dri_context *ctx,
 240                         struct dri_drawable *drawable,
 241                         enum st_attachment_type statt)
 242 {
 243    struct pipe_resource *ptex;
 244
 245    if (!ctx)
 246       return;
 247
 248    ptex = drawable->textures[statt];
 249
 250    if (ptex) {
 251       drisw_copy_to_front(ctx->dPriv, ptex);
 252    }
 253 }
 254
 255 /**
 256  * Allocate framebuffer attachments.
 257  *
 258  * During fixed-size operation, the function keeps allocating new attachments
 259  * as they are requested. Unused attachments are not removed, not until the
 260  * framebuffer is resized or destroyed.
 261  */
 262 static void
 263 drisw_allocate_textures(struct dri_context *stctx,
 264                         struct dri_drawable *drawable,
 265                         const enum st_attachment_type *statts,
 266                         unsigned count)
 267 {
 268    struct dri_screen *screen = dri_screen(drawable->sPriv);
 269    const __DRIswrastLoaderExtension *loader = drawable->dPriv->driScreenPriv->swrast_loader;
 270    struct pipe_resource templ;
 271    unsigned width, height;
 272    boolean resized;
 273    unsigned i;
 274
 275    width  = drawable->dPriv->w;
 276    height = drawable->dPriv->h;
 277
 278    resized = (drawable->old_w != width ||
 279               drawable->old_h != height);
 280
 281    /* remove outdated textures */
 282    if (resized) {
 283       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 284          pipe_resource_reference(&drawable->textures[i], NULL);
 285    }
 286
 287    memset(&templ, 0, sizeof(templ));
 288    templ.target = screen->target;
 289    templ.width0 = width;
 290    templ.height0 = height;
 291    templ.depth0 = 1;
 292    templ.array_size = 1;
 293    templ.last_level = 0;
 294
 295    for (i = 0; i < count; i++) {
 296       enum pipe_format format;
 297       unsigned bind;
 298
 299       /* the texture already exists or not requested */
 300       if (drawable->textures[statts[i]])
 301          continue;
 302
 303       dri_drawable_get_format(drawable, statts[i], &format, &bind);
 304
 305       /* if we don't do any present, no need for display targets */
 306       if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL && !swrast_no_present)
 307          bind |= PIPE_BIND_DISPLAY_TARGET;
 308
 309       if (format == PIPE_FORMAT_NONE)
 310          continue;
 311
 312       templ.format = format;
 313       templ.bind = bind;
 314
 315       if (statts[i] == ST_ATTACHMENT_FRONT_LEFT &&
 316           screen->base.screen->resource_create_front &&
 317           loader->base.version >= 3) {
 318          drawable->textures[statts[i]] =
 319             screen->base.screen->resource_create_front(screen->base.screen, &templ, (const void *)drawable);
 320       } else
 321          drawable->textures[statts[i]] =
 322             screen->base.screen->resource_create(screen->base.screen, &templ);
 323    }
 324
 325    drawable->old_w = width;
 326    drawable->old_h = height;
 327 }
 328
 329 static void
 330 drisw_update_tex_buffer(struct dri_drawable *drawable,
 331                         struct dri_context *ctx,
 332                         struct pipe_resource *res)
 333 {
 334    __DRIdrawable *dPriv = drawable->dPriv;
 335
 336    struct st_context *st_ctx = (struct st_context *)ctx->st;
 337    struct pipe_context *pipe = st_ctx->pipe;
 338    struct pipe_transfer *transfer;
 339    char *map;
 340    int x, y, w, h;
 341    int ximage_stride, line;
 342    int cpp = util_format_get_blocksize(res->format);
 343
 344    get_drawable_info(dPriv, &x, &y, &w, &h);
 345
 346    map = pipe_transfer_map(pipe, res,
 347                            0, 0, // level, layer,
 348                            PIPE_TRANSFER_WRITE,
 349                            x, y, w, h, &transfer);
 350
 351    /* Copy the Drawable content to the mapped texture buffer */
 352    get_image(dPriv, x, y, w, h, map);
 353
 354    /* The pipe transfer has a pitch rounded up to the nearest 64 pixels.
 355       get_image() has a pitch rounded up to 4 bytes.  */
 356    ximage_stride = ((w * cpp) + 3) & -4;
 357    for (line = h-1; line; --line) {
 358       memmove(&map[line * transfer->stride],
 359               &map[line * ximage_stride],
 360               ximage_stride);
 361    }
 362
 363    pipe_transfer_unmap(pipe, transfer);
 364 }
 365
 366 /*
 367  * Backend function for init_screen.
 368  */
 369
 370 static const __DRIextension *drisw_screen_extensions[] = {
 371    &driTexBufferExtension.base,
 372    &dri2RendererQueryExtension.base,
 373    &dri2ConfigQueryExtension.base,
 374    NULL
 375 };
 376
 377 static struct drisw_loader_funcs drisw_lf = {
 378    .get_image = drisw_get_image,
 379    .put_image = drisw_put_image,
 380    .put_image2 = drisw_put_image2
 381 };
 382
 383 static const __DRIconfig **
 384 drisw_init_screen(__DRIscreen * sPriv)
 385 {
 386    const __DRIconfig **configs;
 387    struct dri_screen *screen;
 388    struct pipe_screen *pscreen;
 389
 390    screen = CALLOC_STRUCT(dri_screen);
 391    if (!screen)
 392       return NULL;
 393
 394    screen->sPriv = sPriv;
 395    screen->fd = -1;
 396
 397    swrast_no_present = debug_get_option_swrast_no_present();
 398
 399    sPriv->driverPrivate = (void *)screen;
 400    sPriv->extensions = drisw_screen_extensions;
 401
 402    pscreen = drisw_create_screen(&drisw_lf);
 403    /* dri_init_screen_helper checks pscreen for us */
 404
 405    configs = dri_init_screen_helper(screen, pscreen, "swrast");
 406    if (!configs)
 407       goto fail;
 408
 409    return configs;
 410 fail:
 411    dri_destroy_screen_helper(screen);
 412    FREE(screen);
 413    return NULL;
 414 }
 415
 416 static boolean
 417 drisw_create_buffer(__DRIscreen * sPriv,
 418                     __DRIdrawable * dPriv,
 419                     const struct gl_config * visual, boolean isPixmap)
 420 {
 421    struct dri_drawable *drawable = NULL;
 422
 423    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
 424       return FALSE;
 425
 426    drawable = dPriv->driverPrivate;
 427
 428    drawable->allocate_textures = drisw_allocate_textures;
 429    drawable->update_drawable_info = drisw_update_drawable_info;
 430    drawable->flush_frontbuffer = drisw_flush_frontbuffer;
 431    drawable->update_tex_buffer = drisw_update_tex_buffer;
 432
 433    return TRUE;
 434 }
 435
 436 /**
 437  * DRI driver virtual function table.
 438  *
 439  * DRI versions differ in their implementation of init_screen and swap_buffers.
 440  */
 441 const struct __DriverAPIRec galliumsw_driver_api = {
 442    .InitScreen = drisw_init_screen,
 443    .DestroyScreen = dri_destroy_screen,
 444    .CreateContext = dri_create_context,
 445    .DestroyContext = dri_destroy_context,
 446    .CreateBuffer = drisw_create_buffer,
 447    .DestroyBuffer = dri_destroy_buffer,
 448    .SwapBuffers = drisw_swap_buffers,
 449    .MakeCurrent = dri_make_current,
 450    .UnbindContext = dri_unbind_context,
 451    .CopySubBuffer = drisw_copy_sub_buffer,
 452 };
 453
 454 /* This is the table of extensions that the loader will dlsym() for. */
 455 const __DRIextension *galliumsw_driver_extensions[] = {
 456     &driCoreExtension.base,
 457     &driSWRastExtension.base,
 458     &driCopySubBufferExtension.base,
 459     &gallium_config_options.base,
 460     NULL
 461 };
 462
 463 /* vim: set sw=3 ts=8 sts=3 expandtab: */