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