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