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_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 182 {
 183    assert(!surf || surf->Type == EGL_PBUFFER_BIT);
 184
 185    /* From the EGL 1.5 spec:
 186     *    If surface is a [...] pbuffer surface, eglSwapBuffers has no effect.
 187     */
 188    return EGL_TRUE;
 189 }
 190
 191 static EGLBoolean
 192 surfaceless_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *dpy)
 193 {
 194    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 195    static const struct {
 196       const char *format_name;
 197       unsigned int rgba_masks[4];
 198    } visuals[] = {
 199       { "ARGB8888", { 0xff0000, 0xff00, 0xff, 0xff000000 } },
 200       { "RGB888",   { 0xff0000, 0xff00, 0xff, 0x0 } },
 201       { "RGB565",   { 0x00f800, 0x07e0, 0x1f, 0x0 } },
 202    };
 203    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
 204    unsigned int count, i, j;
 205
 206    count = 0;
 207    for (i = 0; dri2_dpy->driver_configs[i] != NULL; i++) {
 208       for (j = 0; j < ARRAY_SIZE(visuals); j++) {
 209          struct dri2_egl_config *dri2_conf;
 210
 211          dri2_conf = dri2_add_config(dpy, dri2_dpy->driver_configs[i],
 212                count + 1, EGL_PBUFFER_BIT, NULL, visuals[j].rgba_masks);
 213
 214          if (dri2_conf) {
 215             count++;
 216             format_count[j]++;
 217          }
 218       }
 219    }
 220
 221    for (i = 0; i < ARRAY_SIZE(format_count); i++) {
 222       if (!format_count[i]) {
 223          _eglLog(_EGL_DEBUG, "No DRI config supports native format %s",
 224                visuals[i].format_name);
 225       }
 226    }
 227
 228    return (count != 0);
 229 }
 230
 231 static struct dri2_egl_display_vtbl dri2_surfaceless_display_vtbl = {
 232    .create_pixmap_surface = dri2_fallback_create_pixmap_surface,
 233    .create_pbuffer_surface = dri2_surfaceless_create_pbuffer_surface,
 234    .destroy_surface = surfaceless_destroy_surface,
 235    .create_image = dri2_create_image_khr,
 236    .swap_interval = dri2_fallback_swap_interval,
 237    .swap_buffers = surfaceless_swap_buffers,
 238    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 239    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 240    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 241    .copy_buffers = dri2_fallback_copy_buffers,
 242    .query_buffer_age = dri2_fallback_query_buffer_age,
 243    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 244    .get_sync_values = dri2_fallback_get_sync_values,
 245    .get_dri_drawable = dri2_surface_get_dri_drawable,
 246 };
 247
 248 static void
 249 surfaceless_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 250 {
 251 }
 252
 253 static const __DRIimageLoaderExtension image_loader_extension = {
 254    .base             = { __DRI_IMAGE_LOADER, 1 },
 255    .getBuffers       = surfaceless_image_get_buffers,
 256    .flushFrontBuffer = surfaceless_flush_front_buffer,
 257 };
 258
 259 #define DRM_RENDER_DEV_NAME  "%s/renderD%d"
 260
 261 static const __DRIextension *image_loader_extensions[] = {
 262    &image_loader_extension.base,
 263    &image_lookup_extension.base,
 264    &use_invalidate.base,
 265    NULL,
 266 };
 267
 268 EGLBoolean
 269 dri2_initialize_surfaceless(_EGLDriver *drv, _EGLDisplay *disp)
 270 {
 271    struct dri2_egl_display *dri2_dpy;
 272    const char* err;
 273    int i;
 274    int driver_loaded = 0;
 275
 276    loader_set_logger(_eglLog);
 277
 278    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 279    if (!dri2_dpy)
 280       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 281
 282    dri2_dpy->fd = -1;
 283    disp->DriverData = (void *) dri2_dpy;
 284
 285    const int limit = 64;
 286    const int base = 128;
 287    for (i = 0; i < limit; ++i) {
 288       char *card_path;
 289       if (asprintf(&card_path, DRM_RENDER_DEV_NAME, DRM_DIR_NAME, base + i) < 0)
 290          continue;
 291
 292       dri2_dpy->fd = loader_open_device(card_path);
 293
 294       free(card_path);
 295       if (dri2_dpy->fd < 0)
 296          continue;
 297
 298       dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 299       if (dri2_dpy->driver_name) {
 300          if (dri2_load_driver(disp)) {
 301             driver_loaded = 1;
 302             break;
 303          }
 304          free(dri2_dpy->driver_name);
 305          dri2_dpy->driver_name = NULL;
 306       }
 307       close(dri2_dpy->fd);
 308       dri2_dpy->fd = -1;
 309    }
 310
 311    if (!driver_loaded) {
 312       err = "DRI2: failed to load driver";
 313       goto cleanup;
 314    }
 315
 316    dri2_dpy->loader_extensions = image_loader_extensions;
 317
 318    if (!dri2_create_screen(disp)) {
 319       err = "DRI2: failed to create screen";
 320       goto cleanup;
 321    }
 322
 323    if (!dri2_setup_extensions(disp)) {
 324       err = "DRI2: failed to find required DRI extensions";
 325       goto cleanup;
 326    }
 327
 328    dri2_setup_screen(disp);
 329
 330    if (!surfaceless_add_configs_for_visuals(drv, disp)) {
 331       err = "DRI2: failed to add configs";
 332       goto cleanup;
 333    }
 334
 335    /* Fill vtbl last to prevent accidentally calling virtual function during
 336     * initialization.
 337     */
 338    dri2_dpy->vtbl = &dri2_surfaceless_display_vtbl;
 339
 340    return EGL_TRUE;
 341
 342 cleanup:
 343    dri2_display_destroy(disp);
 344    return _eglError(EGL_NOT_INITIALIZED, err);
 345 }