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 "pipe-loader/pipe_loader.h"
  43 #include "state_tracker/drisw_api.h"
  44 #include "state_tracker/st_context.h"
  45
  46 #include "dri_screen.h"
  47 #include "dri_context.h"
  48 #include "dri_drawable.h"
  49 #include "dri_extensions.h"
  50 #include "dri_query_renderer.h"
  51
  52 DEBUG_GET_ONCE_BOOL_OPTION(swrast_no_present, "SWRAST_NO_PRESENT", FALSE);
  53 static boolean swrast_no_present = FALSE;
  54
  55 static inline void
  56 get_drawable_info(__DRIdrawable *dPriv, int *x, int *y, int *w, int *h)
  57 {
  58    __DRIscreen *sPriv = dPriv->driScreenPriv;
  59    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  60
  61    loader->getDrawableInfo(dPriv,
  62                            x, y, w, h,
  63                            dPriv->loaderPrivate);
  64 }
  65
  66 static inline void
  67 put_image(__DRIdrawable *dPriv, void *data, unsigned width, unsigned height)
  68 {
  69    __DRIscreen *sPriv = dPriv->driScreenPriv;
  70    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  71
  72    loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
  73                     0, 0, width, height,
  74                     data, dPriv->loaderPrivate);
  75 }
  76
  77 static inline void
  78 put_image2(__DRIdrawable *dPriv, void *data, int x, int y,
  79            unsigned width, unsigned height, unsigned stride)
  80 {
  81    __DRIscreen *sPriv = dPriv->driScreenPriv;
  82    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  83
  84    loader->putImage2(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
  85                      x, y, width, height, stride,
  86                      data, dPriv->loaderPrivate);
  87 }
  88
  89 static inline void
  90 get_image(__DRIdrawable *dPriv, int x, int y, int width, int height, void *data)
  91 {
  92    __DRIscreen *sPriv = dPriv->driScreenPriv;
  93    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  94
  95    loader->getImage(dPriv,
  96                     x, y, width, height,
  97                     data, dPriv->loaderPrivate);
  98 }
  99
 100 static inline void
 101 get_image2(__DRIdrawable *dPriv, int x, int y, int width, int height, int stride, void *data)
 102 {
 103    __DRIscreen *sPriv = dPriv->driScreenPriv;
 104    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
 105
 106    /* getImage2 support is only in version 3 or newer */
 107    if (loader->base.version < 3)
 108       return;
 109
 110    loader->getImage2(dPriv,
 111                      x, y, width, height, stride,
 112                      data, dPriv->loaderPrivate);
 113 }
 114
 115 static void
 116 drisw_update_drawable_info(struct dri_drawable *drawable)
 117 {
 118    __DRIdrawable *dPriv = drawable->dPriv;
 119    int x, y;
 120
 121    get_drawable_info(dPriv, &x, &y, &dPriv->w, &dPriv->h);
 122 }
 123
 124 static void
 125 drisw_get_image(struct dri_drawable *drawable,
 126                 int x, int y, unsigned width, unsigned height, unsigned stride,
 127                 void *data)
 128 {
 129    __DRIdrawable *dPriv = drawable->dPriv;
 130    int draw_x, draw_y, draw_w, draw_h;
 131
 132    get_drawable_info(dPriv, &draw_x, &draw_y, &draw_w, &draw_h);
 133    get_image2(dPriv, x, y, draw_w, draw_h, stride, data);
 134 }
 135
 136 static void
 137 drisw_put_image(struct dri_drawable *drawable,
 138                 void *data, unsigned width, unsigned height)
 139 {
 140    __DRIdrawable *dPriv = drawable->dPriv;
 141
 142    put_image(dPriv, data, width, height);
 143 }
 144
 145 static void
 146 drisw_put_image2(struct dri_drawable *drawable,
 147                  void *data, int x, int y, unsigned width, unsigned height,
 148                  unsigned stride)
 149 {
 150    __DRIdrawable *dPriv = drawable->dPriv;
 151
 152    put_image2(dPriv, data, x, y, width, height, stride);
 153 }
 154
 155 static inline void
 156 drisw_present_texture(__DRIdrawable *dPriv,
 157                       struct pipe_resource *ptex, struct pipe_box *sub_box)
 158 {
 159    struct dri_drawable *drawable = dri_drawable(dPriv);
 160    struct dri_screen *screen = dri_screen(drawable->sPriv);
 161
 162    if (swrast_no_present)
 163       return;
 164
 165    screen->base.screen->flush_frontbuffer(screen->base.screen, ptex, 0, 0, drawable, sub_box);
 166 }
 167
 168 static inline void
 169 drisw_invalidate_drawable(__DRIdrawable *dPriv)
 170 {
 171    struct dri_drawable *drawable = dri_drawable(dPriv);
 172
 173    drawable->texture_stamp = dPriv->lastStamp - 1;
 174
 175    p_atomic_inc(&drawable->base.stamp);
 176 }
 177
 178 static inline void
 179 drisw_copy_to_front(__DRIdrawable * dPriv,
 180                     struct pipe_resource *ptex)
 181 {
 182    drisw_present_texture(dPriv, ptex, NULL);
 183
 184    drisw_invalidate_drawable(dPriv);
 185 }
 186
 187 /*
 188  * Backend functions for st_framebuffer interface and swap_buffers.
 189  */
 190
 191 static void
 192 drisw_swap_buffers(__DRIdrawable *dPriv)
 193 {
 194    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 195    struct dri_drawable *drawable = dri_drawable(dPriv);
 196    struct pipe_resource *ptex;
 197
 198    if (!ctx)
 199       return;
 200
 201    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 202
 203    if (ptex) {
 204       if (ctx->pp)
 205          pp_run(ctx->pp, ptex, ptex, drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL]);
 206
 207       ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
 208
 209       drisw_copy_to_front(dPriv, ptex);
 210    }
 211 }
 212
 213 static void
 214 drisw_copy_sub_buffer(__DRIdrawable *dPriv, int x, int y,
 215                       int w, int h)
 216 {
 217    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 218    struct dri_drawable *drawable = dri_drawable(dPriv);
 219    struct pipe_resource *ptex;
 220    struct pipe_box box;
 221    if (!ctx)
 222       return;
 223
 224    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 225
 226    if (ptex) {
 227       if (ctx->pp && drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL])
 228          pp_run(ctx->pp, ptex, ptex, drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL]);
 229
 230       ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);
 231
 232       u_box_2d(x, dPriv->h - y - h, w, h, &box);
 233       drisw_present_texture(dPriv, ptex, &box);
 234    }
 235 }
 236
 237 static void
 238 drisw_flush_frontbuffer(struct dri_context *ctx,
 239                         struct dri_drawable *drawable,
 240                         enum st_attachment_type statt)
 241 {
 242    struct pipe_resource *ptex;
 243
 244    if (!ctx)
 245       return;
 246
 247    ptex = drawable->textures[statt];
 248
 249    if (ptex) {
 250       drisw_copy_to_front(ctx->dPriv, ptex);
 251    }
 252 }
 253
 254 /**
 255  * Allocate framebuffer attachments.
 256  *
 257  * During fixed-size operation, the function keeps allocating new attachments
 258  * as they are requested. Unused attachments are not removed, not until the
 259  * framebuffer is resized or destroyed.
 260  */
 261 static void
 262 drisw_allocate_textures(struct dri_context *stctx,
 263                         struct dri_drawable *drawable,
 264                         const enum st_attachment_type *statts,
 265                         unsigned count)
 266 {
 267    struct dri_screen *screen = dri_screen(drawable->sPriv);
 268    const __DRIswrastLoaderExtension *loader = drawable->dPriv->driScreenPriv->swrast_loader;
 269    struct pipe_resource templ;
 270    unsigned width, height;
 271    boolean resized;
 272    unsigned i;
 273
 274    width  = drawable->dPriv->w;
 275    height = drawable->dPriv->h;
 276
 277    resized = (drawable->old_w != width ||
 278               drawable->old_h != height);
 279
 280    /* remove outdated textures */
 281    if (resized) {
 282       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 283          pipe_resource_reference(&drawable->textures[i], NULL);
 284    }
 285
 286    memset(&templ, 0, sizeof(templ));
 287    templ.target = screen->target;
 288    templ.width0 = width;
 289    templ.height0 = height;
 290    templ.depth0 = 1;
 291    templ.array_size = 1;
 292    templ.last_level = 0;
 293
 294    for (i = 0; i < count; i++) {
 295       enum pipe_format format;
 296       unsigned bind;
 297
 298       /* the texture already exists or not requested */
 299       if (drawable->textures[statts[i]])
 300          continue;
 301
 302       dri_drawable_get_format(drawable, statts[i], &format, &bind);
 303
 304       /* if we don't do any present, no need for display targets */
 305       if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL && !swrast_no_present)
 306          bind |= PIPE_BIND_DISPLAY_TARGET;
 307
 308       if (format == PIPE_FORMAT_NONE)
 309          continue;
 310
 311       templ.format = format;
 312       templ.bind = bind;
 313
 314       if (statts[i] == ST_ATTACHMENT_FRONT_LEFT &&
 315           screen->base.screen->resource_create_front &&
 316           loader->base.version >= 3) {
 317          drawable->textures[statts[i]] =
 318             screen->base.screen->resource_create_front(screen->base.screen, &templ, (const void *)drawable);
 319       } else
 320          drawable->textures[statts[i]] =
 321             screen->base.screen->resource_create(screen->base.screen, &templ);
 322    }
 323
 324    drawable->old_w = width;
 325    drawable->old_h = height;
 326 }
 327
 328 static void
 329 drisw_update_tex_buffer(struct dri_drawable *drawable,
 330                         struct dri_context *ctx,
 331                         struct pipe_resource *res)
 332 {
 333    __DRIdrawable *dPriv = drawable->dPriv;
 334
 335    struct st_context *st_ctx = (struct st_context *)ctx->st;
 336    struct pipe_context *pipe = st_ctx->pipe;
 337    struct pipe_transfer *transfer;
 338    char *map;
 339    int x, y, w, h;
 340    int ximage_stride, line;
 341    int cpp = util_format_get_blocksize(res->format);
 342
 343    get_drawable_info(dPriv, &x, &y, &w, &h);
 344
 345    map = pipe_transfer_map(pipe, res,
 346                            0, 0, // level, layer,
 347                            PIPE_TRANSFER_WRITE,
 348                            x, y, w, h, &transfer);
 349
 350    /* Copy the Drawable content to the mapped texture buffer */
 351    get_image(dPriv, x, y, w, h, map);
 352
 353    /* The pipe transfer has a pitch rounded up to the nearest 64 pixels.
 354       get_image() has a pitch rounded up to 4 bytes.  */
 355    ximage_stride = ((w * cpp) + 3) & -4;
 356    for (line = h-1; line; --line) {
 357       memmove(&map[line * transfer->stride],
 358               &map[line * ximage_stride],
 359               ximage_stride);
 360    }
 361
 362    pipe_transfer_unmap(pipe, transfer);
 363 }
 364
 365 /*
 366  * Backend function for init_screen.
 367  */
 368
 369 static const __DRIextension *drisw_screen_extensions[] = {
 370    &driTexBufferExtension.base,
 371    &dri2RendererQueryExtension.base,
 372    &dri2ConfigQueryExtension.base,
 373    &dri2FenceExtension.base,
 374    &dri2NoErrorExtension.base,
 375    NULL
 376 };
 377
 378 static struct drisw_loader_funcs drisw_lf = {
 379    .get_image = drisw_get_image,
 380    .put_image = drisw_put_image,
 381    .put_image2 = drisw_put_image2
 382 };
 383
 384 static const __DRIconfig **
 385 drisw_init_screen(__DRIscreen * sPriv)
 386 {
 387    const __DRIconfig **configs;
 388    struct dri_screen *screen;
 389    struct pipe_screen *pscreen = NULL;
 390
 391    screen = CALLOC_STRUCT(dri_screen);
 392    if (!screen)
 393       return NULL;
 394
 395    screen->sPriv = sPriv;
 396    screen->fd = -1;
 397
 398    swrast_no_present = debug_get_option_swrast_no_present();
 399
 400    sPriv->driverPrivate = (void *)screen;
 401    sPriv->extensions = drisw_screen_extensions;
 402
 403    if (pipe_loader_sw_probe_dri(&screen->dev, &drisw_lf)) {
 404       struct pipe_screen_config config;
 405       dri_init_options(screen);
 406
 407       pscreen = pipe_loader_create_screen(screen->dev, &config);
 408    }
 409
 410    if (!pscreen)
 411       goto fail;
 412
 413    configs = dri_init_screen_helper(screen, pscreen);
 414    if (!configs)
 415       goto fail;
 416
 417    return configs;
 418 fail:
 419    dri_destroy_screen_helper(screen);
 420    if (screen->dev)
 421       pipe_loader_release(&screen->dev, 1);
 422    FREE(screen);
 423    return NULL;
 424 }
 425
 426 static boolean
 427 drisw_create_buffer(__DRIscreen * sPriv,
 428                     __DRIdrawable * dPriv,
 429                     const struct gl_config * visual, boolean isPixmap)
 430 {
 431    struct dri_drawable *drawable = NULL;
 432
 433    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
 434       return FALSE;
 435
 436    drawable = dPriv->driverPrivate;
 437
 438    drawable->allocate_textures = drisw_allocate_textures;
 439    drawable->update_drawable_info = drisw_update_drawable_info;
 440    drawable->flush_frontbuffer = drisw_flush_frontbuffer;
 441    drawable->update_tex_buffer = drisw_update_tex_buffer;
 442
 443    return TRUE;
 444 }
 445
 446 /**
 447  * DRI driver virtual function table.
 448  *
 449  * DRI versions differ in their implementation of init_screen and swap_buffers.
 450  */
 451 const struct __DriverAPIRec galliumsw_driver_api = {
 452    .InitScreen = drisw_init_screen,
 453    .DestroyScreen = dri_destroy_screen,
 454    .CreateContext = dri_create_context,
 455    .DestroyContext = dri_destroy_context,
 456    .CreateBuffer = drisw_create_buffer,
 457    .DestroyBuffer = dri_destroy_buffer,
 458    .SwapBuffers = drisw_swap_buffers,
 459    .MakeCurrent = dri_make_current,
 460    .UnbindContext = dri_unbind_context,
 461    .CopySubBuffer = drisw_copy_sub_buffer,
 462 };
 463
 464 /* This is the table of extensions that the loader will dlsym() for. */
 465 const __DRIextension *galliumsw_driver_extensions[] = {
 466     &driCoreExtension.base,
 467     &driSWRastExtension.base,
 468     &driCopySubBufferExtension.base,
 469     &gallium_config_options.base,
 470     NULL
 471 };
 472
 473 /* vim: set sw=3 ts=8 sts=3 expandtab: */