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
40static __DRIimage*
41surfaceless_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
53static void
54surfaceless_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
65static int
66surfaceless_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
108static _EGLSurface *
109dri2_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
158static EGLBoolean
159surfaceless_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
172static _EGLSurface *
173dri2_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
180static EGLBoolean
181surfaceless_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
191static EGLBoolean
192surfaceless_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
231static 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
248static void
249surfaceless_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
250{
251}
252
253static 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
261static const __DRIextension *image_loader_extensions[] = {
262   &image_loader_extension.base,
263   &image_lookup_extension.base,
264   &use_invalidate.base,
265   NULL,
266};
267
268EGLBoolean
269dri2_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   disp->DriverData = (void *) dri2_dpy;
283
284   const int limit = 64;
285   const int base = 128;
286   for (i = 0; i < limit; ++i) {
287      char *card_path;
288      if (asprintf(&card_path, DRM_RENDER_DEV_NAME, DRM_DIR_NAME, base + i) < 0)
289         continue;
290
291      dri2_dpy->fd = loader_open_device(card_path);
292
293      free(card_path);
294      if (dri2_dpy->fd < 0)
295         continue;
296
297      dri2_dpy->driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
298      if (dri2_dpy->driver_name) {
299         if (dri2_load_driver(disp)) {
300            driver_loaded = 1;
301            break;
302         }
303         free(dri2_dpy->driver_name);
304      }
305      close(dri2_dpy->fd);
306   }
307
308   if (!driver_loaded) {
309      err = "DRI2: failed to load driver";
310      goto cleanup_display;
311   }
312
313   dri2_dpy->loader_extensions = image_loader_extensions;
314
315   if (!dri2_create_screen(disp)) {
316      err = "DRI2: failed to create screen";
317      goto cleanup_driver;
318   }
319
320   if (!surfaceless_add_configs_for_visuals(drv, disp)) {
321      err = "DRI2: failed to add configs";
322      goto cleanup_screen;
323   }
324
325   /* Fill vtbl last to prevent accidentally calling virtual function during
326    * initialization.
327    */
328   dri2_dpy->vtbl = &dri2_surfaceless_display_vtbl;
329
330   return EGL_TRUE;
331
332cleanup_screen:
333   dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
334
335cleanup_driver:
336   dlclose(dri2_dpy->driver);
337   free(dri2_dpy->driver_name);
338   close(dri2_dpy->fd);
339cleanup_display:
340   free(dri2_dpy);
341   disp->DriverData = NULL;
342
343   return _eglError(EGL_NOT_INITIALIZED, err);
344}
345