Added 'save frame to ppm' button to Linux/GTK3 test program

openpnp · Jul 24, 2017 · 1e9e627 · 1e9e627
1 parent 9091337
commit 1e9e627
Showing 1 changed file with 24 additions and 3 deletions.
diff --git a/linux/tests/gtkmain.cpp b/linux/tests/gtkmain.cpp
@@ -23,6 +23,7 @@ typedef struct
  CapContext ctx;
  int32_t streamID;
  bool takeSnapshot;
+ uint32_t snapshotCounter;
 } TimerCallbackInfo;
 
 
@@ -43,6 +44,14 @@ static void activate(GtkApplication* app,
  gtk_widget_show_all (window);
 }
 
+static void triggerSnapshot(GtkWidget *widget,
+ gpointer data)
+{
+ TimerCallbackInfo *id = (TimerCallbackInfo*)data;
+ id->takeSnapshot = true;
+ printf("Snapshot triggered!\n");
+}
+
 bool writeBufferAsPPM(uint32_t frameNum, uint32_t width, uint32_t height, const uint8_t *bufferPtr, size_t bytes)
 {
  char fname[100];
@@ -82,7 +91,7 @@ int updatePicture(gpointer data)
  if (id->takeSnapshot)
  {
  id->takeSnapshot = false;
- writeBufferAsPPM(0, id->cols, id->rows, g, id->cols * id->rows * 3);
+ writeBufferAsPPM(id->snapshotCounter++, id->cols, id->rows, g, id->cols * id->rows * 3);
  }
  }
  else
@@ -111,6 +120,9 @@ int main (int argc, char *argv[])
  // https://cboard.cprogramming.com/c-programming/172801-how-display-2d-array-image-using-gtk3plus.html
 
  GtkApplication *app;
+ GtkWidget *button;
+ GtkWidget *button_box;
+
  int status;
 
  uint32_t deviceFormatID = 0;
@@ -190,7 +202,8 @@ int main (int argc, char *argv[])
  id.stride += (4 - id.stride % 4) % 4; // ensure multiple of 4
  id.ctx = ctx;
  id.streamID = streamID;
- id.takeSnapshot = true;
+ id.takeSnapshot = false;
+ id.snapshotCounter = 0;
 
  guchar *pixels = (guchar *)calloc(finfo.height * id.stride, 1);
 
@@ -222,7 +235,15 @@ int main (int argc, char *argv[])
  gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
  g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 
- gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(id.image));
+
+
+ button_box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
+ gtk_container_add(GTK_CONTAINER (window), button_box);
+
+ button = gtk_button_new_with_label ("Save Frame to .ppm");
+ g_signal_connect (button, "clicked", G_CALLBACK (triggerSnapshot), &id);
+ gtk_container_add(GTK_CONTAINER(button_box), GTK_WIDGET(id.image));
+ gtk_container_add(GTK_CONTAINER(button_box), button);
 
  g_timeout_add(250, // milliseconds
  updatePicture, // handler function