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