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 / texture_from_pixmap / 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
  43 #include "dri_screen.h"
  44 #include "dri_context.h"
  45 #include "dri_drawable.h"
  46
  47 DEBUG_GET_ONCE_BOOL_OPTION(swrast_no_present, "SWRAST_NO_PRESENT", FALSE);
  48 static boolean swrast_no_present = FALSE;
  49
  50 static INLINE void
  51 get_drawable_info(__DRIdrawable *dPriv, int *w, int *h)
  52 {
  53    __DRIscreen *sPriv = dPriv->driScreenPriv;
  54    const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
  55    int x, y;
  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 void
  74 drisw_update_drawable_info(struct dri_drawable *drawable)
  75 {
  76    __DRIdrawable *dPriv = drawable->dPriv;
  77
  78    get_drawable_info(dPriv, &dPriv->w, &dPriv->h);
  79 }
  80
  81 static void
  82 drisw_put_image(struct dri_drawable *drawable,
  83                 void *data, unsigned width, unsigned height)
  84 {
  85    __DRIdrawable *dPriv = drawable->dPriv;
  86
  87    put_image(dPriv, data, width, height);
  88 }
  89
  90 static struct pipe_surface *
  91 drisw_get_pipe_surface(struct dri_drawable *drawable, struct pipe_resource *ptex)
  92 {
  93    struct pipe_screen *pipe_screen = dri_screen(drawable->sPriv)->base.screen;
  94    struct pipe_surface *psurf = drawable->drisw_surface;
  95
  96    if (!psurf || psurf->texture != ptex) {
  97       pipe_surface_reference(&drawable->drisw_surface, NULL);
  98
  99       drawable->drisw_surface = pipe_screen->get_tex_surface(pipe_screen,
 100             ptex, 0, 0, 0, 0/* no bind flag???*/);
 101
 102       psurf = drawable->drisw_surface;
 103    }
 104
 105    return psurf;
 106 }
 107
 108 static INLINE void
 109 drisw_present_texture(__DRIdrawable *dPriv,
 110                       struct pipe_resource *ptex)
 111 {
 112    struct dri_drawable *drawable = dri_drawable(dPriv);
 113    struct dri_screen *screen = dri_screen(drawable->sPriv);
 114    struct pipe_surface *psurf;
 115
 116    if (swrast_no_present)
 117       return;
 118
 119    psurf = drisw_get_pipe_surface(drawable, ptex);
 120    if (!psurf)
 121       return;
 122
 123    screen->base.screen->flush_frontbuffer(screen->base.screen, psurf, drawable);
 124 }
 125
 126 static INLINE void
 127 drisw_invalidate_drawable(__DRIdrawable *dPriv)
 128 {
 129    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 130    struct dri_drawable *drawable = dri_drawable(dPriv);
 131
 132    drawable->texture_stamp = dPriv->lastStamp - 1;
 133
 134    /* check if swapping currently bound buffer */
 135    if (ctx && ctx->dPriv == dPriv)
 136       ctx->st->notify_invalid_framebuffer(ctx->st, &drawable->base);
 137 }
 138
 139 static INLINE void
 140 drisw_copy_to_front(__DRIdrawable * dPriv,
 141                     struct pipe_resource *ptex)
 142 {
 143    drisw_present_texture(dPriv, ptex);
 144
 145    drisw_invalidate_drawable(dPriv);
 146 }
 147
 148 /*
 149  * Backend functions for st_framebuffer interface and swap_buffers.
 150  */
 151
 152 static void
 153 drisw_swap_buffers(__DRIdrawable *dPriv)
 154 {
 155    struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);
 156    struct dri_drawable *drawable = dri_drawable(dPriv);
 157    struct pipe_resource *ptex;
 158
 159    if (!ctx)
 160       return;
 161
 162    ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];
 163
 164    if (ptex) {
 165       ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
 166
 167       drisw_copy_to_front(dPriv, ptex);
 168    }
 169 }
 170
 171 static void
 172 drisw_flush_frontbuffer(struct dri_drawable *drawable,
 173                         enum st_attachment_type statt)
 174 {
 175    struct dri_context *ctx = dri_get_current(drawable->sPriv);
 176    struct pipe_resource *ptex;
 177
 178    if (!ctx)
 179       return;
 180
 181    ptex = drawable->textures[statt];
 182
 183    if (ptex) {
 184       drisw_copy_to_front(ctx->dPriv, ptex);
 185    }
 186 }
 187
 188 /**
 189  * Allocate framebuffer attachments.
 190  *
 191  * During fixed-size operation, the function keeps allocating new attachments
 192  * as they are requested. Unused attachments are not removed, not until the
 193  * framebuffer is resized or destroyed.
 194  */
 195 static void
 196 drisw_allocate_textures(struct dri_drawable *drawable,
 197                         const enum st_attachment_type *statts,
 198                         unsigned count)
 199 {
 200    struct dri_screen *screen = dri_screen(drawable->sPriv);
 201    struct pipe_resource templ;
 202    unsigned width, height;
 203    boolean resized;
 204    unsigned i;
 205
 206    width  = drawable->dPriv->w;
 207    height = drawable->dPriv->h;
 208
 209    resized = (drawable->old_w != width ||
 210               drawable->old_h != height);
 211
 212    /* remove outdated textures */
 213    if (resized) {
 214       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 215          pipe_resource_reference(&drawable->textures[i], NULL);
 216    }
 217
 218    memset(&templ, 0, sizeof(templ));
 219    templ.target = screen->target;
 220    templ.width0 = width;
 221    templ.height0 = height;
 222    templ.depth0 = 1;
 223    templ.last_level = 0;
 224
 225    for (i = 0; i < count; i++) {
 226       enum pipe_format format;
 227       unsigned bind;
 228
 229       /* the texture already exists or not requested */
 230       if (drawable->textures[statts[i]])
 231          continue;
 232
 233       dri_drawable_get_format(drawable, statts[i], &format, &bind);
 234
 235       /* if we don't do any present, no need for display targets */
 236       if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL && !swrast_no_present)
 237          bind |= PIPE_BIND_DISPLAY_TARGET;
 238
 239       if (format == PIPE_FORMAT_NONE)
 240          continue;
 241
 242       templ.format = format;
 243       templ.bind = bind;
 244
 245       drawable->textures[statts[i]] =
 246          screen->base.screen->resource_create(screen->base.screen, &templ);
 247    }
 248
 249    drawable->old_w = width;
 250    drawable->old_h = height;
 251 }
 252
 253 /*
 254  * Backend function for init_screen.
 255  */
 256
 257 static const __DRIextension *drisw_screen_extensions[] = {
 258    NULL
 259 };
 260
 261 static struct drisw_loader_funcs drisw_lf = {
 262    .put_image = drisw_put_image
 263 };
 264
 265 static const __DRIconfig **
 266 drisw_init_screen(__DRIscreen * sPriv)
 267 {
 268    const __DRIconfig **configs;
 269    struct dri_screen *screen;
 270    struct pipe_screen *pscreen;
 271
 272    screen = CALLOC_STRUCT(dri_screen);
 273    if (!screen)
 274       return NULL;
 275
 276    screen->sPriv = sPriv;
 277    screen->fd = -1;
 278
 279    swrast_no_present = debug_get_option_swrast_no_present();
 280
 281    sPriv->private = (void *)screen;
 282    sPriv->extensions = drisw_screen_extensions;
 283
 284    pscreen = drisw_create_screen(&drisw_lf);
 285    /* dri_init_screen_helper checks pscreen for us */
 286
 287    configs = dri_init_screen_helper(screen, pscreen, 32);
 288    if (!configs)
 289       goto fail;
 290
 291    return configs;
 292 fail:
 293    dri_destroy_screen_helper(screen);
 294    FREE(screen);
 295    return NULL;
 296 }
 297
 298 static boolean
 299 drisw_create_buffer(__DRIscreen * sPriv,
 300                     __DRIdrawable * dPriv,
 301                     const __GLcontextModes * visual, boolean isPixmap)
 302 {
 303    struct dri_drawable *drawable = NULL;
 304
 305    if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))
 306       return FALSE;
 307
 308    drawable = dPriv->driverPrivate;
 309
 310    drawable->allocate_textures = drisw_allocate_textures;
 311    drawable->update_drawable_info = drisw_update_drawable_info;
 312    drawable->flush_frontbuffer = drisw_flush_frontbuffer;
 313
 314    return TRUE;
 315 }
 316
 317 /**
 318  * DRI driver virtual function table.
 319  *
 320  * DRI versions differ in their implementation of init_screen and swap_buffers.
 321  */
 322 const struct __DriverAPIRec driDriverAPI = {
 323    .InitScreen = drisw_init_screen,
 324    .DestroyScreen = dri_destroy_screen,
 325    .CreateContext = dri_create_context,
 326    .DestroyContext = dri_destroy_context,
 327    .CreateBuffer = drisw_create_buffer,
 328    .DestroyBuffer = dri_destroy_buffer,
 329    .MakeCurrent = dri_make_current,
 330    .UnbindContext = dri_unbind_context,
 331
 332    .SwapBuffers = drisw_swap_buffers,
 333 };
 334
 335 /* This is the table of extensions that the loader will dlsym() for. */
 336 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 337     &driCoreExtension.base,
 338     &driSWRastExtension.base,
 339     NULL
 340 };
 341
 342 /* vim: set sw=3 ts=8 sts=3 expandtab: */