[Mesa-users] Need help getting start with EGL/DRM/KMS/GLES2

[Albert Freeman]

Well with these quick and dirty changes I made, it works fine on my
system, no segfault and the screen displays red.

--- gleskmsorg.c    2015-09-01 14:04:32.853672410 +0000
+++ gleskms.c    2015-09-01 14:03:57.797005474 +0000
@@ -24,8 +24,6 @@ EGL_CONFORMANT, EGL_OPENGL_ES2_BIT,
 EGL_NONE };

 static const char device_name[] = "/dev/dri/card0";
-static const uint32_t drm_mode_connector_id = 18;
-static const uint32_t drm_mode_crtc_id = 21;

 int main(void) {

@@ -86,10 +84,12 @@ int main(void) {
         exit(EXIT_FAILURE);
     }

+    drmModeRes *res;
     drmModeConnector *conn;
     uint32_t conn_id, width, height;
     drmModeModeInfo modeinfo;
-    conn = drmModeGetConnector(fd, drm_mode_connector_id);
+    res = drmModeGetResources(fd);
+    conn = drmModeGetConnector(fd, *res->connectors);
     conn_id = conn->connector_id;
     width = conn->modes[0].hdisplay;
     height = conn->modes[0].vdisplay;
@@ -129,7 +129,7 @@ int main(void) {
         exit(EXIT_FAILURE);
     }

-    ret = drmModeSetCrtc(fd, drm_mode_crtc_id, drm_fb_id, 0, 0, &conn_id, 1,
+    ret = drmModeSetCrtc(fd, *res->crtcs, drm_fb_id, 0, 0, &conn_id, 1,
             &modeinfo);
     if (ret) {
         printf("failed to set mode: %m\n");
@@ -143,8 +143,8 @@ int main(void) {
     gbm_surface_destroy(gs);
     eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
     eglDestroyContext(dpy, ctx);
-//    eglDestroySurface(dpy, surface);
-//    eglTerminate(dpy);
+    eglDestroySurface(dpy, surface);
+    eglTerminate(dpy);
     gbm_device_destroy(gbm);
     close(fd);
     return 0;