ext/cairo/gsttextoverlay.h

   1
   2 #ifndef __GST_CAIRO_TEXT_OVERLAY_H__
   3 #define __GST_CAIRO_TEXT_OVERLAY_H__
   4
   5 #include <gst/gst.h>
   6 #include <gst/base/gstcollectpads.h>
   7
   8 G_BEGIN_DECLS
   9
  10 #define GST_TYPE_CAIRO_TEXT_OVERLAY           (gst_text_overlay_get_type())
  11 #define GST_CAIRO_TEXT_OVERLAY(obj)           (G_TYPE_CHECK_INSTANCE_CAST((obj),\
  12                                         GST_TYPE_CAIRO_TEXT_OVERLAY, GstCairoTextOverlay))
  13 #define GST_CAIRO_TEXT_OVERLAY_CLASS(klass)   (G_TYPE_CHECK_CLASS_CAST((klass),\
  14                                         GST_TYPE_CAIRO_TEXT_OVERLAY, GstCairoTextOverlayClass))
  15 #define GST_CAIRO_TEXT_OVERLAY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),\
  16                                         GST_TYPE_CAIRO_TEXT_OVERLAY, GstCairoTextOverlayClass))
  17 #define GST_IS_CAIRO_TEXT_OVERLAY(obj)        (G_TYPE_CHECK_INSTANCE_TYPE((obj),\
  18                                         GST_TYPE_CAIRO_TEXT_OVERLAY))
  19 #define GST_IS_CAIRO_TEXT_OVERLAY_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE((klass),\
  20                                         GST_TYPE_CAIRO_TEXT_OVERLAY))
  21
  22 typedef struct _GstCairoTextOverlay      GstCairoTextOverlay;
  23 typedef struct _GstCairoTextOverlayClass GstCairoTextOverlayClass;
  24
  25 typedef enum _GstCairoTextOverlayVAlign GstCairoTextOverlayVAlign;
  26 typedef enum _GstCairoTextOverlayHAlign GstCairoTextOverlayHAlign;
  27
  28 enum _GstCairoTextOverlayVAlign {
  29     GST_CAIRO_TEXT_OVERLAY_VALIGN_BASELINE,
  30     GST_CAIRO_TEXT_OVERLAY_VALIGN_BOTTOM,
  31     GST_CAIRO_TEXT_OVERLAY_VALIGN_TOP
  32 };
  33
  34 enum _GstCairoTextOverlayHAlign {
  35     GST_CAIRO_TEXT_OVERLAY_HALIGN_LEFT,
  36     GST_CAIRO_TEXT_OVERLAY_HALIGN_CENTER,
  37     GST_CAIRO_TEXT_OVERLAY_HALIGN_RIGHT
  38 };
  39
  40
  41 struct _GstCairoTextOverlay {
  42     GstElement            element;
  43
  44     GstPad               *video_sinkpad;
  45     GstPad               *text_sinkpad;
  46     GstPad               *srcpad;
  47
  48     GstCollectPads       *collect;
  49     GstCollectData       *video_collect_data;
  50     GstCollectData       *text_collect_data;
  51
  52     gint                  width;
  53     gint                  height;
  54     gint                  fps_n;
  55     gint                  fps_d;
  56
  57     GstCairoTextOverlayVAlign  valign;
  58     GstCairoTextOverlayHAlign  halign;
  59     gint                  xpad;
  60     gint                  ypad;
  61     gint                  deltax;
  62     gint                  deltay;
  63     gchar                *default_text;
  64     gboolean              want_shading;
  65
  66     guchar               *text_fill_image;
  67     guchar               *text_outline_image;
  68     gint                  font_height;
  69     gint                  text_x0, text_x1; /* start/end x position of text */
  70     gint                  text_dy;
  71
  72     gboolean              need_render;
  73
  74     gchar                *font;
  75     gint                  slant;
  76     gint                  weight;
  77     gdouble               scale;
  78 };
  79
  80 struct _GstCairoTextOverlayClass {
  81   GstElementClass parent_class;
  82 };
  83
  84 GType gst_text_overlay_get_type (void);
  85
  86 G_END_DECLS
  87
  88 #endif /* __GST_CAIRO_TEXT_OVERLAY_H */