git.maemo.org Git - mafwsubrenderer/blob - gst-plugins-base-subtitles0.10/ext/pango/gsttextrender.h

   1 #ifndef __GST_TEXT_RENDER_H__
   2 #define __GST_TEXT_RENDER_H__
   3
   4 #include <gst/gst.h>
   5 #include <pango/pangocairo.h>
   6
   7 G_BEGIN_DECLS
   8
   9 #define GST_TYPE_TEXT_RENDER            (gst_text_render_get_type())
  10 #define GST_TEXT_RENDER(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),\
  11                                         GST_TYPE_TEXT_RENDER, GstTextRender))
  12 #define GST_TEXT_RENDER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),\
  13                                         GST_TYPE_TEXT_RENDER, GstTextRenderClass))
  14 #define GST_TEXT_RENDER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),\
  15                                         GST_TYPE_TEXT_RENDER, GstTextRenderClass))
  16 #define GST_IS_TEXT_RENDER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),\
  17                                         GST_TYPE_TEXT_RENDER))
  18 #define GST_IS_TEXT_RENDER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),\
  19                                         GST_TYPE_TEXT_RENDER))
  20
  21 typedef struct _GstTextRender      GstTextRender;
  22 typedef struct _GstTextRenderClass GstTextRenderClass;
  23
  24 /**
  25  * GstTextRenderVAlign:
  26  * @GST_TEXT_RENDER_VALIGN_BASELINE: draw text on the baseline
  27  * @GST_TEXT_RENDER_VALIGN_BOTTOM: draw text on the bottom
  28  * @GST_TEXT_RENDER_VALIGN_TOP: draw test on top
  29  *
  30  * Vertical alignment of the text.
  31  */
  32 typedef enum {
  33     GST_TEXT_RENDER_VALIGN_BASELINE,
  34     GST_TEXT_RENDER_VALIGN_BOTTOM,
  35     GST_TEXT_RENDER_VALIGN_TOP
  36 } GstTextRenderVAlign;
  37
  38 /**
  39  * GstTextRenderHAlign:
  40  * @GST_TEXT_RENDER_HALIGN_LEFT: align text left
  41  * @GST_TEXT_RENDER_HALIGN_CENTER: align text center
  42  * @GST_TEXT_RENDER_HALIGN_RIGHT: align text right
  43  *
  44  * Horizontal alignment of the text.
  45  */
  46 typedef enum {
  47     GST_TEXT_RENDER_HALIGN_LEFT,
  48     GST_TEXT_RENDER_HALIGN_CENTER,
  49     GST_TEXT_RENDER_HALIGN_RIGHT
  50 } GstTextRenderHAlign;
  51
  52 /**
  53  * GstTextRenderLineAlign:
  54  * @GST_TEXT_RENDER_LINE_ALIGN_LEFT: lines are left-aligned
  55  * @GST_TEXT_RENDER_LINE_ALIGN_CENTER: lines are center-aligned
  56  * @GST_TEXT_RENDER_LINE_ALIGN_RIGHT: lines are right-aligned
  57  *
  58  * Alignment of text lines relative to each other
  59  */
  60 typedef enum {
  61     GST_TEXT_RENDER_LINE_ALIGN_LEFT = PANGO_ALIGN_LEFT,
  62     GST_TEXT_RENDER_LINE_ALIGN_CENTER = PANGO_ALIGN_CENTER,
  63     GST_TEXT_RENDER_LINE_ALIGN_RIGHT = PANGO_ALIGN_RIGHT
  64 } GstTextRenderLineAlign;
  65
  66 /**
  67  * GstTextRender:
  68  *
  69  * Opaque textrender data structure.
  70  */
  71 struct _GstTextRender {
  72     GstElement            element;
  73
  74     GstPad               *sinkpad, *srcpad;
  75     gint                  width;
  76     gint                  height;
  77     PangoLayout          *layout;
  78     gdouble               shadow_offset;
  79     gdouble               outline_offset;
  80     guchar               *text_image;
  81     gint                  image_width;
  82     gint                  image_height;
  83     gint                  baseline_y;
  84     gboolean              use_ARGB;
  85
  86     GstTextRenderVAlign     valign;
  87     GstTextRenderHAlign     halign;
  88     GstTextRenderLineAlign  line_align;
  89
  90     gint xpad;
  91     gint ypad;
  92 };
  93
  94 struct _GstTextRenderClass {
  95     GstElementClass parent_class;
  96
  97     PangoContext *pango_context;
  98 };
  99
 100 GType gst_text_render_get_type(void) G_GNUC_CONST;
 101
 102 G_END_DECLS
 103
 104 #endif /* __GST_TEXT_RENDER_H */