glfilterapp: remove the reshape/draw properties

The reshape property was never used.
Replace the draw property with a signal.

Based on patch by Mathieu Duponchelle <mathieu.duponchelle@epitech.eu>

https://bugzilla.gnome.org/show_bug.cgi?id=704507

ext/gl/gstglfilterapp.c

@@ -47,12 +47,13 @@ GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
 
 enum
 {
-  PROP_0,
-  PROP_CLIENT_RESHAPE_CALLBACK,
-  PROP_CLIENT_DRAW_CALLBACK,
-  PROP_CLIENT_DATA
+  SIGNAL_0,
+  CLIENT_DRAW_SIGNAL,
+  LAST_SIGNAL
 };
 
+static guint gst_gl_filter_app_signals[LAST_SIGNAL] = { 0 };
+
 #define DEBUG_INIT \
   GST_DEBUG_CATEGORY_INIT (gst_gl_filter_app_debug, "glfilterapp", 0, "glfilterapp element");
 
@@ -88,21 +89,20 @@ gst_gl_filter_app_class_init (GstGLFilterAppClass * klass)
   GST_GL_FILTER_CLASS (klass)->filter_texture =
       gst_gl_filter_app_filter_texture;
 
-  g_object_class_install_property (gobject_class, PROP_CLIENT_RESHAPE_CALLBACK,
-      g_param_spec_pointer ("client-reshape-callback",
-          "Client reshape callback",
-          "Define a custom reshape callback in a client code",
-          G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
-
-  g_object_class_install_property (gobject_class, PROP_CLIENT_DRAW_CALLBACK,
-      g_param_spec_pointer ("client-draw-callback", "Client draw callback",
-          "Define a custom draw callback in a client code",
-          G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
-
-  g_object_class_install_property (gobject_class, PROP_CLIENT_DATA,
-      g_param_spec_pointer ("client-data", "Client data",
-          "Pass data to the draw and reshape callbacks",
-          G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
+  /**
+   * GstGLFilterApp::client-draw:
+   * @object: the #GstGLImageSink
+   * @texture: the #guint id of the texture.
+   * @width: the #guint width of the texture.
+   * @height: the #guint height of the texture.
+   *
+   * Will be emitted before to draw the texture.  The client should
+   * redraw the surface/contents with the @texture, @width and @height.
+   */
+  gst_gl_filter_app_signals[CLIENT_DRAW_SIGNAL] =
+      g_signal_new ("client-draw", G_TYPE_FROM_CLASS (klass),
+      G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
+      G_TYPE_NONE, 3, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
 
   gst_element_class_set_metadata (element_class,
       "OpenGL application filter", "Filter/Effect",
@@ -113,33 +113,13 @@ gst_gl_filter_app_class_init (GstGLFilterAppClass * klass)
 static void
 gst_gl_filter_app_init (GstGLFilterApp * filter)
 {
-  filter->clientReshapeCallback = NULL;
-  filter->clientDrawCallback = NULL;
-  filter->client_data = NULL;
 }
 
 static void
 gst_gl_filter_app_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)
 {
-  GstGLFilterApp *filter = GST_GL_FILTER_APP (object);
-
   switch (prop_id) {
-    case PROP_CLIENT_RESHAPE_CALLBACK:
-    {
-      filter->clientReshapeCallback = g_value_get_pointer (value);
-      break;
-    }
-    case PROP_CLIENT_DRAW_CALLBACK:
-    {
-      filter->clientDrawCallback = g_value_get_pointer (value);
-      break;
-    }
-    case PROP_CLIENT_DATA:
-    {
-      filter->client_data = g_value_get_pointer (value);
-      break;
-    }
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -150,8 +130,6 @@ static void
 gst_gl_filter_app_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec)
 {
-  //GstGLFilterApp* filter = GST_GL_FILTER_APP (object);
-
   switch (prop_id) {
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -168,6 +146,15 @@ gst_gl_filter_app_set_caps (GstGLFilter * filter, GstCaps * incaps,
   return TRUE;
 }
 
+static void
+_emit_draw_signal (guint tex, gint width, gint height, gpointer data)
+{
+  GstGLFilter *filter = data;
+
+  g_signal_emit (filter, gst_gl_filter_app_signals[CLIENT_DRAW_SIGNAL], 0,
+      tex, width, height);
+}
+
 static gboolean
 gst_gl_filter_app_filter_texture (GstGLFilter * filter, guint in_tex,
     guint out_tex)
@@ -179,15 +166,13 @@ gst_gl_filter_app_filter_texture (GstGLFilter * filter, guint in_tex,
     gst_gl_context_use_fbo (filter->context,
         GST_VIDEO_INFO_WIDTH (&filter->out_info),
         GST_VIDEO_INFO_HEIGHT (&filter->out_info),
-        filter->fbo, filter->depthbuffer, out_tex,
-        app_filter->clientDrawCallback,
+        filter->fbo, filter->depthbuffer, out_tex, (GLCB) _emit_draw_signal,
         GST_VIDEO_INFO_WIDTH (&filter->in_info),
         GST_VIDEO_INFO_HEIGHT (&filter->in_info),
         in_tex, 45,
         (gfloat) GST_VIDEO_INFO_WIDTH (&filter->out_info) /
         (gfloat) GST_VIDEO_INFO_HEIGHT (&filter->out_info),
-        0.1, 100, GST_GL_DISPLAY_PROJECTION_PERSPECTIVE,
-        app_filter->client_data);
+        0.1, 100, GST_GL_DISPLAY_PROJECTION_PERSPECTIVE, filter);
   }
   //default
   else {

ext/gl/gstglfilterapp.h

@@ -38,7 +38,6 @@ struct _GstGLFilterApp
 {
     GstGLFilter filter;
 
-    CRCB clientReshapeCallback;
     GLCB clientDrawCallback;
     gpointer client_data;
 };

gst-libs/gst/gl/gstglutils.h

@@ -39,15 +39,6 @@ typedef enum
   GST_GL_DISPLAY_PROJECTION_PERSPECTIVE
 } GstGLDisplayProjection;
 
-/**
- * CRCB:
- * @width: new width
- * @height: new height:
- * @data: user data
- *
- * client reshape callback
- */
-typedef void (*CRCB) (GLuint width, GLuint height, gpointer data);
 /**
  * CDCB:
  * @texture: texture to draw

tests/examples/gl/generic/recordgraphic/main.cpp

@@ -65,19 +65,8 @@ static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data)
     return TRUE;
 }
 
-//client reshape callback
-static void reshapeCallback (GLuint width, GLuint height)
-{
-    glViewport(0, 0, width, height);
-    glMatrixMode(GL_PROJECTION);
-    glLoadIdentity();
-    gluPerspective(45, (gfloat)width/(gfloat)height, 0.1, 100);
-    glMatrixMode(GL_MODELVIEW);
-}
-
-
 //client draw callback
-static gboolean drawCallback (GLuint width, GLuint height, GLuint texture, gpointer data)
+static gboolean drawCallback (void *filter, GLuint width, GLuint height, GLuint texture, gpointer data)
 {
     static GLfloat	xrot = 0;
     static GLfloat	yrot = 0;
@@ -215,9 +204,7 @@ gint main (gint argc, gchar *argv[])
 
     /* configure elements */
     g_object_set(G_OBJECT(videosrc), "num-buffers", 400, NULL);
-    g_object_set(G_OBJECT(glfilterapp), "client-reshape-callback", reshapeCallback, NULL);
-    g_object_set(G_OBJECT(glfilterapp), "client-draw-callback", drawCallback, NULL);
-    g_object_set(G_OBJECT(glfilterapp), "client-data", NULL, NULL);
+    g_signal_connect(G_OBJECT(glfilterapp), "client-draw", G_CALLBACK (drawCallback), NULL);
     g_object_set(G_OBJECT(filesink), "location", "record.avi", NULL);
 
     /* add elements */