[cogl/wip/outputs: 48/52] stash: cogl-kms-hello example

[Robert Bragg <rbragg src gnome org>]

commit 3b358772bf6b038461e64562392cdcc535c0a716
Author: Robert Bragg <robert linux intel com>
Date:   Fri Apr 19 00:50:00 2013 +0100

    stash: cogl-kms-hello example

 examples/Makefile.am      |    7 +
 examples/cogl-kms-hello.c |  272 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 279 insertions(+), 0 deletions(-)
---
diff --git a/examples/Makefile.am b/examples/Makefile.am
index d9198a9..8386070 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -66,6 +66,13 @@ cogl_x11_tfp_SOURCES = cogl-x11-tfp.c
 cogl_x11_tfp_LDADD = $(common_ldadd)
 endif
 
+if SUPPORT_EGL_PLATFORM_KMS
+programs += cogl-kms-hello
+cogl_kms_hello_SOURCES = cogl-kms-hello.c
+cogl_kms_hello_CFLAGS = -I$(top_srcdir)/deps/vts $(AM_CFLAGS)
+cogl_kms_hello_LDADD = $(common_ldadd) $(VTS_DEP_LIBS) -lpam $(top_builddir)/deps/vts/libvts.la
+endif
+
 if SUPPORT_WAYLAND_EGL_SERVER
 programs += cogland
 cogland_SOURCES = cogland.c
diff --git a/examples/cogl-kms-hello.c b/examples/cogl-kms-hello.c
new file mode 100644
index 0000000..ca293d1
--- /dev/null
+++ b/examples/cogl-kms-hello.c
@@ -0,0 +1,272 @@
+#include <glib.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+#include <cogl/cogl.h>
+#include <vts.h>
+
+typedef struct _Data
+{
+  VTSClient *vts_client;
+  int kms_fd;
+  CoglContext *ctx;
+  CoglDisplay *display;
+  CoglFramebuffer *fb;
+  CoglPrimitive *triangle;
+  CoglPipeline *pipeline;
+  bool ready;
+  bool active;
+} Data;
+
+static void
+paint (Data *data)
+{
+  if (!data->active)
+    {
+      g_print ("SKIP Paint\n");
+      return;
+    }
+
+  g_print ("Paint\n");
+  cogl_framebuffer_clear4f (data->fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
+  cogl_framebuffer_draw_primitive (data->fb, data->pipeline, data->triangle);
+  cogl_onscreen_swap_buffers (COGL_ONSCREEN (data->fb));
+  data->ready = FALSE;
+}
+
+static void
+frame_event_cb (CoglOnscreen *onscreen,
+                CoglFrameEvent event,
+                CoglFrameInfo *info,
+                void *user_data)
+{
+  if (event == COGL_FRAME_EVENT_SYNC)
+    {
+      Data *data = user_data;
+      data->ready = TRUE;
+      paint (user_data);
+    }
+}
+
+static void
+set_drm_master (Data *data)
+{
+  VTSError *error = NULL;
+
+  if (!vts_client_drm_set_master (data->vts_client, data->kms_fd, TRUE, &error))
+    {
+      fprintf (stderr, "Failed to become DRM master: %s\n", error->message);
+      vts_error_free (error);
+    }
+
+  cogl_kms_display_queue_modes_reset (data->display);
+}
+
+static void
+app_init (Data *data)
+{
+  CoglRenderer *renderer;
+  CoglOnscreen *onscreen;
+  CoglVertexP2C4 triangle_vertices[] = {
+        {0, 0.7, 0xff, 0x00, 0x00, 0x80},
+        {-0.7, -0.7, 0x00, 0xff, 0x00, 0xff},
+        {0.7, -0.7, 0x00, 0x00, 0xff, 0xff}
+  };
+
+  printf ("App Init\n");
+
+  renderer = cogl_renderer_new ();
+  cogl_renderer_add_constraint (renderer, COGL_RENDERER_CONSTRAINT_USES_KMS);
+  cogl_renderer_connect (renderer, NULL);
+  data->kms_fd = cogl_kms_renderer_get_kms_fd (renderer);
+
+  data->display = cogl_display_new (renderer, NULL);
+  cogl_object_unref (renderer);
+
+  set_drm_master (data);
+
+  data->ctx = cogl_context_new (data->display, NULL);
+
+  printf ("Cogl context created\n");
+
+  onscreen = cogl_onscreen_new (data->ctx, 640, 480);
+  cogl_onscreen_show (onscreen);
+  data->fb = COGL_FRAMEBUFFER (onscreen);
+
+  cogl_onscreen_set_resizable (onscreen, TRUE);
+
+  data->triangle = cogl_primitive_new_p2c4 (data->ctx,
+                                            COGL_VERTICES_MODE_TRIANGLES,
+                                            3, triangle_vertices);
+  data->pipeline = cogl_pipeline_new (data->ctx);
+
+  cogl_onscreen_add_frame_callback (COGL_ONSCREEN (data->fb),
+                                    frame_event_cb,
+                                    data,
+                                    NULL); /* destroy notify */
+}
+
+#if 0
+static void
+app_fini (Data *data)
+{
+  cogl_object_unref (data->pipeline);
+  cogl_object_unref (data->triangle);
+  cogl_object_unref (data->fb);
+
+  cogl_object_unref (data->ctx);
+  cogl_object_unref (data->display);
+
+  printf ("Cogl context freed\n");
+}
+#endif
+
+static void
+on_enter (VTSClient *client, void *user_data)
+{
+  Data *data = user_data;
+
+  printf ("VT Enter\n");
+
+  set_drm_master (data);
+
+  data->active = TRUE;
+
+  if (data->ready)
+    {
+      printf ("Paint on enter\n");
+      paint (data);
+    }
+}
+
+static void
+on_leave (VTSClient *client, void *user_data)
+{
+  Data *data = user_data;
+  VTSError *error = NULL;
+
+  printf ("VT Leave\n");
+
+#warning "XXX: do we need to inform Cogl that we are reliquishing DRM master?"
+
+  if (!vts_client_drm_set_master (client, data->kms_fd, FALSE, &error))
+    {
+      fprintf (stderr, "Failed to drop DRM master: %s\n", error->message);
+      vts_error_free (error);
+      vts_client_deny_vt_leave (client, NULL);
+    }
+
+  data->active = FALSE;
+
+  vts_client_accept_vt_leave (client, NULL);
+}
+
+static void
+run_client (VTSClient *client)
+{
+  Data data;
+  int poll_fd_state_age = 0;
+  CoglPollFD *poll_fds = NULL;
+  int n_poll_fds = 0;
+  int vts_fd;
+
+  memset (&data, 0, sizeof (data));
+
+  data.vts_client = client;
+
+  vts_client_set_vt_enter_callback (client, on_enter, &data);
+  vts_client_set_vt_leave_callback (client, on_leave, &data);
+
+  vts_fd = vts_client_get_poll_fd (client);
+
+  app_init (&data);
+  data.active = TRUE;
+  data.ready = TRUE;
+
+  paint (&data);
+
+  printf ("Running mainloop\n");
+  while (1)
+    {
+      CoglPollFD *cogl_poll_fds;
+      int n_cogl_poll_fds;
+      int64_t timeout = -1;
+      int age;
+      VTSError *vts_error = NULL;
+
+      if (data.active)
+        {
+          age = cogl_poll_renderer_get_info (cogl_context_get_renderer (data.ctx),
+                                             &cogl_poll_fds,
+                                             &n_cogl_poll_fds,
+                                             &timeout);
+
+          /* We also need to listen for libvts messages... */
+          if (age != poll_fd_state_age)
+            {
+              free (poll_fds);
+              n_poll_fds = n_cogl_poll_fds + 1;
+              poll_fds = malloc (sizeof (CoglPollFD) * n_poll_fds);
+              memcpy (poll_fds, cogl_poll_fds,
+                      sizeof (CoglPollFD) * n_cogl_poll_fds);
+              poll_fds[n_cogl_poll_fds].fd = vts_fd;
+              poll_fds[n_cogl_poll_fds].events = G_IO_IN;
+              poll_fd_state_age = age;
+            }
+        }
+      else if (n_poll_fds != 1)
+        {
+          free (poll_fds);
+          poll_fds = malloc (sizeof (CoglPollFD));
+          poll_fds->fd = vts_fd;
+          poll_fds->events = G_IO_IN;
+          n_poll_fds = 1;
+          poll_fd_state_age = 0;
+        }
+
+      g_poll ((GPollFD *) poll_fds, n_poll_fds,
+              timeout == -1 ? -1 : timeout / 1000);
+
+      /* NB: It's important not to try and dispatch Cogl events while
+       * we aren't active since we can end up blocked inside
+       * drmHandleEvent() */
+      if (data.active)
+        {
+          cogl_poll_renderer_dispatch (cogl_context_get_renderer (data.ctx),
+                                       poll_fds, n_poll_fds);
+        }
+
+      if (!vts_client_dispatch (client, &vts_error))
+        {
+          fprintf (stderr, "Failed to dispatch vts events: %s\n",
+                   vts_error->message);
+          exit (1);
+        }
+    }
+}
+
+int
+main (int argc, char **argv)
+{
+  VTSServer *server;
+  VTSClient *client;
+  VTSError *error = NULL;
+
+  server = vts_server_new ();
+  vts_server_set_pam_enabled (server, TRUE);
+  vts_server_set_kernel_key_bindings_enabled (server, TRUE);
+
+  client = vts_server_run (server, &error);
+
+  if (error)
+    {
+      fprintf (stderr, "Failed to run VTS server: %s\n", error->message);
+      vts_error_free (error);
+      return EXIT_FAILURE;
+    }
+
+  if (client)
+    run_client (client);
+
+  return EXIT_SUCCESS;
+}