summaryrefslogtreecommitdiff
path: root/src/egl/wayland/wayland-egl/wayland-egl.c
blob: 2c84bec64a5dd2cfe304cfd751ea8b2dfcc34b25 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include <dlfcn.h>

#include <wayland-client.h>
#include "wayland-egl.h"
#include "wayland-egl-priv.h"
#include "wayland-drm-client-protocol.h"
#include <xf86drm.h>

static void
drm_handle_device(void *data, struct wl_drm *drm, const char *device)
{
	struct wl_egl_display *egl_display = data;
	drm_magic_t magic;

	egl_display->device_name = strdup(device);

	egl_display->fd = open(egl_display->device_name, O_RDWR);

	if (egl_display->fd == -1) {
		fprintf(stderr, "wayland-egl: could not open %s (%s)",
			egl_display->device_name, strerror(errno));
		return;
	}
	drmGetMagic(egl_display->fd, &magic);
	wl_drm_authenticate(egl_display->drm, magic);
}

static void
drm_handle_authenticated(void *data, struct wl_drm *drm)
{
	struct wl_egl_display *egl_display = data;

	egl_display->authenticated = true;
}

static const struct wl_drm_listener drm_listener = {
	drm_handle_device,
	drm_handle_authenticated
};

static void
wl_display_handle_global(struct wl_display *display, uint32_t id,
			 const char *interface, uint32_t version, void *data)
{
	struct wl_egl_display *egl_display = data;

	if (strcmp(interface, "drm") == 0) {
		egl_display->drm = wl_drm_create(display, id);
		wl_drm_add_listener(egl_display->drm, &drm_listener,
				    egl_display);
	}
}

/* stolen from egl_dri2:dri2_load() */
static void *
get_flush_address() {
	void *handle;
	void *(*get_proc_address)(const char *procname);

	handle = dlopen(NULL, RTLD_LAZY | RTLD_GLOBAL);
	if (handle) {
		get_proc_address = (void* (*)(const char *))
			dlsym(handle, "_glapi_get_proc_address");
		/* no need to keep a reference */
		dlclose(handle);
	}

	/*
	 * If glapi is not available, loading DRI drivers will fail.  Ideally, we
	 * should load one of libGL, libGLESv1_CM, or libGLESv2 and go on.  But if
	 * the app has loaded another one of them with RTLD_LOCAL, there may be
	 * unexpected behaviors later because there will be two copies of glapi
	 * (with global variables of the same names!) in the memory.
	 */
	if (!get_proc_address) {
		fprintf(stderr, "failed to find _glapi_get_proc_address");
		return NULL;
	}

	return get_proc_address("glFlush");
}

WL_EGL_EXPORT struct wl_egl_display *
wl_egl_display_create(struct wl_display *display)
{
	struct wl_egl_display *egl_display;

	egl_display = malloc(sizeof *egl_display);
	if (!egl_display)
		return NULL;

	egl_display->display = display;
	egl_display->drm = NULL;
	egl_display->fd = -1;
	egl_display->device_name = NULL;
	egl_display->authenticated = false;

	egl_display->glFlush = (void (*)(void)) get_flush_address();

	wl_display_add_global_listener(display, wl_display_handle_global,
			               egl_display);

	return egl_display;
}

WL_EGL_EXPORT void
wl_egl_display_destroy(struct wl_egl_display *egl_display)
{

	free(egl_display->device_name);
	close(egl_display->fd);

	wl_drm_destroy(egl_display->drm);

	free(egl_display);
}

WL_EGL_EXPORT void
wl_egl_window_resize(struct wl_egl_window *egl_window,
		     int width, int height,
		     int dx, int dy)
{
	egl_window->width  = width;
	egl_window->height = height;
	egl_window->dx     = dx;
	egl_window->dy     = dy;
}

WL_EGL_EXPORT struct wl_egl_window *
wl_egl_window_create(struct wl_egl_display *egl_display,
		     struct wl_surface *surface,
		     int width, int height,
		     struct wl_visual *visual)
{
	struct wl_egl_window *egl_window;

	egl_window = malloc(sizeof *egl_window);
	if (!egl_window)
		return NULL;

	egl_window->surface = surface;
	egl_window->visual  = visual;
	wl_egl_window_resize(egl_window, width, height, 0, 0);
	egl_window->attached_width  = 0;
	egl_window->attached_height = 0;
	
	return egl_window;
}

WL_EGL_EXPORT void
wl_egl_window_destroy(struct wl_egl_window *egl_window)
{
	free(egl_window);
}

WL_EGL_EXPORT void
wl_egl_window_get_attached_size(struct wl_egl_window *egl_window,
				int *width, int *height)
{
	if (width)
		*width = egl_window->attached_width;
	if (height)
		*height = egl_window->attached_height;
}

WL_EGL_EXPORT struct wl_egl_pixmap *
wl_egl_pixmap_create(struct wl_egl_display *egl_display,
		     int width, int height,
		     struct wl_visual *visual, uint32_t flags)
{
	struct wl_egl_pixmap *egl_pixmap;

	egl_pixmap = malloc(sizeof *egl_pixmap);
	if (egl_pixmap == NULL)
		return NULL;

	egl_pixmap->display = egl_display;
	egl_pixmap->width   = width;
	egl_pixmap->height  = height;
	egl_pixmap->visual  = visual;
	egl_pixmap->name    = 0;
	egl_pixmap->stride  = 0;

	egl_pixmap->destroy = NULL;

	return egl_pixmap;
}

WL_EGL_EXPORT void
wl_egl_pixmap_destroy(struct wl_egl_pixmap *egl_pixmap)
{
	if (egl_pixmap->destroy)
		egl_pixmap->destroy(egl_pixmap);
	free(egl_pixmap);
}

WL_EGL_EXPORT struct wl_buffer *
wl_egl_pixmap_create_buffer(struct wl_egl_display *egl_display,
			    struct wl_egl_pixmap *egl_pixmap)
{
	if (egl_pixmap->name == 0)
		return NULL;

	return wl_drm_create_buffer(egl_display->drm, egl_pixmap->name,
				    egl_pixmap->width, egl_pixmap->height,
				    egl_pixmap->stride, egl_pixmap->visual);
}

WL_EGL_EXPORT void
wl_egl_pixmap_flush(struct wl_egl_display *egl_display,
		    struct wl_egl_pixmap *egl_pixmap)
{
	if (egl_display->glFlush)
		egl_display->glFlush();
}