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