src/egl/drivers/dri2/platform_surfaceless.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (c) 2014 The Chromium OS Authors.
   5  * Copyright © 2011 Intel Corporation
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <xf86drm.h>
  30 #include <dlfcn.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34 #include <unistd.h>
  35
  36 #include "egl_dri2.h"
  37 #include "egl_dri2_fallbacks.h"
  38 #include "loader.h"
  39
  40 static __DRIimage*
  41 surfaceless_alloc_image(struct dri2_egl_display *dri2_dpy,
  42                      struct dri2_egl_surface *dri2_surf)
  43 {
  44    return dri2_dpy->image->createImage(
  45             dri2_dpy->dri_screen,
  46             dri2_surf->base.Width,
  47             dri2_surf->base.Height,
  48             dri2_surf->visual,
  49             0,
  50             NULL);
  51 }
  52
  53 static void
  54 surfaceless_free_images(struct dri2_egl_surface *dri2_surf)
  55 {
  56    struct dri2_egl_display *dri2_dpy =
  57       dri2_egl_display(dri2_surf->base.Resource.Display);
  58
  59    if (dri2_surf->front) {
  60       dri2_dpy->image->destroyImage(dri2_surf->front);
  61       dri2_surf->front = NULL;
  62    }
  63 }
  64
  65 static int
  66 surfaceless_image_get_buffers(__DRIdrawable *driDrawable,
  67                         unsigned int format,
  68                         uint32_t *stamp,
  69                         void *loaderPrivate,
  70                         uint32_t buffer_mask,
  71                         struct __DRIimageList *buffers)
  72 {
  73    struct dri2_egl_surface *dri2_surf = loaderPrivate;
  74    struct dri2_egl_display *dri2_dpy =
  75       dri2_egl_display(dri2_surf->base.Resource.Display);
  76
  77    buffers->image_mask = 0;
  78    buffers->front = NULL;
  79    buffers->back = NULL;
  80
  81    /* The EGL 1.5 spec states that pbuffers are single-buffered. Specifically,
  82     * the spec states that they have a back buffer but no front buffer, in
  83     * contrast to pixmaps, which have a front buffer but no back buffer.
  84     *
  85     * Single-buffered surfaces with no front buffer confuse Mesa; so we deviate
  86     * from the spec, following the precedent of Mesa's EGL X11 platform. The
  87     * X11 platform correctly assigns pbuffers to single-buffered configs, but
  88     * assigns the pbuffer a front buffer instead of a back buffer.
  89     *
  90     * Pbuffers in the X11 platform mostly work today, so let's just copy its
  91     * behavior instead of trying to fix (and hence potentially breaking) the
  92     * world.
  93     */
  94
  95    if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
  96
  97       if (!dri2_surf->front)
  98          dri2_surf->front =
  99             surfaceless_alloc_image(dri2_dpy, dri2_surf);
 100
 101       buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT;
 102       buffers->front = dri2_surf->front;
 103    }
 104
 105    return 1;
 106 }
 107
 108 static _EGLSurface *
 109 dri2_surfaceless_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 110                         _EGLConfig *conf, const EGLint *attrib_list)
 111 {
 112    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 113    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 114    struct dri2_egl_surface *dri2_surf;
 115    const __DRIconfig *config;
 116
 117    /* Make sure to calloc so all pointers
 118     * are originally NULL.
 119     */
 120    dri2_surf = calloc(1, sizeof *dri2_surf);
 121
 122    if (!dri2_surf) {
 123       _eglError(EGL_BAD_ALLOC, "eglCreatePbufferSurface");
 124       return NULL;
 125    }
 126
 127    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 128       goto cleanup_surface;
 129
 130    config = dri2_get_dri_config(dri2_conf, type,
 131                                 dri2_surf->base.GLColorspace);
 132
 133    if (!config)
 134       goto cleanup_surface;
 135
 136    dri2_surf->dri_drawable =
 137       (*dri2_dpy->dri2->createNewDrawable)(dri2_dpy->dri_screen, config,
 138                                            dri2_surf);
 139    if (dri2_surf->dri_drawable == NULL) {
 140       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 141       goto cleanup_surface;
 142     }
 143
 144    if (conf->RedSize == 5)
 145       dri2_surf->visual = __DRI_IMAGE_FORMAT_RGB565;
 146    else if (conf->AlphaSize == 0)
 147       dri2_surf->visual = __DRI_IMAGE_FORMAT_XRGB8888;
 148    else
 149       dri2_surf->visual = __DRI_IMAGE_FORMAT_ARGB8888;
 150
 151    return &dri2_surf->base;
 152
 153    cleanup_surface:
 154       free(dri2_surf);
 155       return NULL;
 156 }
 157
 158 static EGLBoolean
 159 surfaceless_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 160 {
 161    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 162    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 163
 164    surfaceless_free_images(dri2_surf);
 165
 166    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 167
 168    free(dri2_surf);
 169    return EGL_TRUE;
 170 }
 171
 172 static _EGLSurface *
 173 dri2_surfaceless_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 174                                 _EGLConfig *conf, const EGLint *attrib_list)
 175 {
 176    return dri2_surfaceless_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 177                                   attrib_list);
 178 }
 179
 180 static EGLBoolean
 181 surfaceless_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *dpy)
 182 {
 183
 184    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 185
 186    static const unsigned int visuals[3][4] = {
 187       { 0xff0000, 0xff00, 0xff, 0xff000000 },   // ARGB8888
 188       { 0xff0000, 0xff00, 0xff, 0x0 },          // RGB888
 189       { 0xf800, 0x7e0, 0x1f, 0x0  },            // RGB565
 190    };
 191
 192    unsigned int count, i, j;
 193
 194    count = 0;
 195    for (i = 0; i < ARRAY_SIZE(visuals); i++) {
 196       for (j = 0; dri2_dpy->driver_configs[j]; j++) {
 197          struct dri2_egl_config *dri2_conf;
 198
 199          dri2_conf = dri2_add_config(dpy, dri2_dpy->driver_configs[j],
 200                count + 1, EGL_PBUFFER_BIT, NULL, visuals[i]);
 201
 202          if (dri2_conf)
 203             count++;
 204       }
 205    }
 206
 207    if (!count)
 208          _eglLog(_EGL_DEBUG, "Can't create surfaceless visuals");
 209
 210    return (count != 0);
 211 }
 212
 213 static struct dri2_egl_display_vtbl dri2_surfaceless_display_vtbl = {
 214    .create_pixmap_surface = dri2_fallback_create_pixmap_surface,
 215    .create_pbuffer_surface = dri2_surfaceless_create_pbuffer_surface,
 216    .destroy_surface = surfaceless_destroy_surface,
 217    .create_image = dri2_create_image_khr,
 218    .swap_interval = dri2_fallback_swap_interval,
 219    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 220    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 221    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 222    .copy_buffers = dri2_fallback_copy_buffers,
 223    .query_buffer_age = dri2_fallback_query_buffer_age,
 224    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 225    .get_sync_values = dri2_fallback_get_sync_values,
 226    .get_dri_drawable = dri2_surface_get_dri_drawable,
 227 };
 228
 229 static void
 230 surfaceless_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 231 {
 232 }
 233
 234 static const __DRIimageLoaderExtension image_loader_extension = {
 235    .base             = { __DRI_IMAGE_LOADER, 1 },
 236    .getBuffers       = surfaceless_image_get_buffers,
 237    .flushFrontBuffer = surfaceless_flush_front_buffer,
 238 };
 239
 240 #define DRM_RENDER_DEV_NAME  "%s/renderD%d"
 241
 242 EGLBoolean
 243 dri2_initialize_surfaceless(_EGLDriver *drv, _EGLDisplay *disp)
 244 {
 245    struct dri2_egl_display *dri2_dpy;
 246    const char* err;
 247    int i;
 248    int driver_loaded = 0;
 249
 250    loader_set_logger(_eglLog);
 251
 252    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 253    if (!dri2_dpy)
 254       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 255
 256    disp->DriverData = (void *) dri2_dpy;
 257
 258    const int limit = 64;
 259    const int base = 128;
 260    for (i = 0; i < limit; ++i) {
 261       char *card_path;
 262       if (asprintf(&card_path, DRM_RENDER_DEV_NAME, DRM_DIR_NAME, base + i) < 0)
 263          continue;
 264
 265       dri2_dpy->fd = loader_open_device(card_path);
 266
 267       free(card_path);
 268       if (dri2_dpy->fd < 0)
 269          continue;
 270
 271       dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd, 0);
 272       if (dri2_dpy->driver_name) {
 273          if (dri2_load_driver(disp)) {
 274             driver_loaded = 1;
 275             break;
 276          }
 277          free(dri2_dpy->driver_name);
 278       }
 279       close(dri2_dpy->fd);
 280    }
 281
 282    if (!driver_loaded) {
 283       err = "DRI2: failed to load driver";
 284       goto cleanup_display;
 285    }
 286
 287    dri2_dpy->extensions[0] = &image_loader_extension.base;
 288    dri2_dpy->extensions[1] = &image_lookup_extension.base;
 289    dri2_dpy->extensions[2] = &use_invalidate.base;
 290    dri2_dpy->extensions[3] = NULL;
 291
 292    if (!dri2_create_screen(disp)) {
 293       err = "DRI2: failed to create screen";
 294       goto cleanup_driver;
 295    }
 296
 297    if (!surfaceless_add_configs_for_visuals(drv, disp)) {
 298       err = "DRI2: failed to add configs";
 299       goto cleanup_screen;
 300    }
 301
 302    disp->Extensions.KHR_image_base = EGL_TRUE;
 303
 304    /* Fill vtbl last to prevent accidentally calling virtual function during
 305     * initialization.
 306     */
 307    dri2_dpy->vtbl = &dri2_surfaceless_display_vtbl;
 308
 309    return EGL_TRUE;
 310
 311 cleanup_screen:
 312    dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
 313
 314 cleanup_driver:
 315    dlclose(dri2_dpy->driver);
 316    free(dri2_dpy->driver_name);
 317    close(dri2_dpy->fd);
 318 cleanup_display:
 319    free(dri2_dpy);
 320    disp->DriverData = NULL;
 321
 322    return _eglError(EGL_NOT_INITIALIZED, err);
 323 }