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