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#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 <xf86drm.h>
#include "wayland-egl.h"
#include "wayland-egl-priv.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->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_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();
}
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