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gtkglwidget: Calculate the viewport size ourselves

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Getting the current viewport and modifying it relatively will produce an
interesting feedback loop during widget resizing. Over a few frames we
will gradually move the viewport a bit until it converged again, adding
unnecessary additional borders at the top and left.
This commit is contained in:
Sebastian Dröge 2015-06-15 21:29:46 +02:00
parent 5cabeb3415
commit e410c770f5
1 changed files with 8 additions and 6 deletions
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14
ext/gtk/gtkgstglwidget.c
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@ -210,22 +210,24 @@ _redraw_texture (GtkGstGLWidget * gst_widget, guint tex)
if (gst_widget->priv->force_aspect_ratio) {
GstVideoRectangle src, dst, result;
gint gtk_viewport[4];
gint widget_width, widget_height, widget_scale;
gl->ClearColor (0.0, 0.0, 0.0, 0.0);
gl->Clear (GL_COLOR_BUFFER_BIT);
gl->GetIntegerv (GL_VIEWPORT, gtk_viewport);
widget_scale = gtk_widget_get_scale_factor ((GtkWidget *) gst_widget);
widget_width = gtk_widget_get_allocated_width ((GtkWidget *) gst_widget);
widget_height = gtk_widget_get_allocated_height ((GtkWidget *) gst_widget);
src.x = 0;
src.y = 0;
src.w = gst_widget->priv->display_width;
src.h = gst_widget->priv->display_height;
dst.x = gtk_viewport[0];
dst.y = gtk_viewport[1];
dst.w = gtk_viewport[2];
dst.h = gtk_viewport[3];
dst.x = 0;
dst.y = 0;
dst.w = widget_width * widget_scale;
dst.h = widget_height * widget_scale;
gst_video_sink_center_rect (src, dst, &result, TRUE);