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106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
#ifndef __GST_TEXT_RENDER_H__
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#define __GST_TEXT_RENDER_H__
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#include <gst/gst.h>
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#include <pango/pangocairo.h>
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G_BEGIN_DECLS
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#define GST_TYPE_TEXT_RENDER (gst_text_render_get_type())
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#define GST_TEXT_RENDER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),\
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GST_TYPE_TEXT_RENDER, GstTextRender))
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#define GST_TEXT_RENDER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),\
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GST_TYPE_TEXT_RENDER, GstTextRenderClass))
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#define GST_TEXT_RENDER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),\
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GST_TYPE_TEXT_RENDER, GstTextRenderClass))
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#define GST_IS_TEXT_RENDER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),\
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GST_TYPE_TEXT_RENDER))
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#define GST_IS_TEXT_RENDER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),\
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GST_TYPE_TEXT_RENDER))
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typedef struct _GstTextRender GstTextRender;
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typedef struct _GstTextRenderClass GstTextRenderClass;
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/**
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* GstTextRenderVAlign:
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* @GST_TEXT_RENDER_VALIGN_BASELINE: draw text on the baseline
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* @GST_TEXT_RENDER_VALIGN_BOTTOM: draw text on the bottom
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* @GST_TEXT_RENDER_VALIGN_TOP: draw test on top
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*
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* Vertical alignment of the text.
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*/
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typedef enum {
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GST_TEXT_RENDER_VALIGN_BASELINE,
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GST_TEXT_RENDER_VALIGN_BOTTOM,
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GST_TEXT_RENDER_VALIGN_TOP
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} GstTextRenderVAlign;
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/**
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* GstTextRenderHAlign:
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* @GST_TEXT_RENDER_HALIGN_LEFT: align text left
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* @GST_TEXT_RENDER_HALIGN_CENTER: align text center
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* @GST_TEXT_RENDER_HALIGN_RIGHT: align text right
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*
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* Horizontal alignment of the text.
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*/
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typedef enum {
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GST_TEXT_RENDER_HALIGN_LEFT,
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GST_TEXT_RENDER_HALIGN_CENTER,
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GST_TEXT_RENDER_HALIGN_RIGHT
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} GstTextRenderHAlign;
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/**
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* GstTextRenderLineAlign:
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* @GST_TEXT_RENDER_LINE_ALIGN_LEFT: lines are left-aligned
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* @GST_TEXT_RENDER_LINE_ALIGN_CENTER: lines are center-aligned
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* @GST_TEXT_RENDER_LINE_ALIGN_RIGHT: lines are right-aligned
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*
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* Alignment of text lines relative to each other
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*/
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typedef enum {
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GST_TEXT_RENDER_LINE_ALIGN_LEFT = PANGO_ALIGN_LEFT,
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GST_TEXT_RENDER_LINE_ALIGN_CENTER = PANGO_ALIGN_CENTER,
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GST_TEXT_RENDER_LINE_ALIGN_RIGHT = PANGO_ALIGN_RIGHT
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} GstTextRenderLineAlign;
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/**
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* GstTextRender:
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*
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* Opaque textrender data structure.
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*/
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struct _GstTextRender {
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GstElement element;
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GstPad *sinkpad, *srcpad;
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gint width;
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gint height;
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PangoLayout *layout;
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gdouble shadow_offset;
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gdouble outline_offset;
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guchar *text_image;
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gint image_width;
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gint image_height;
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gint baseline_y;
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gboolean use_ARGB;
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GstTextRenderVAlign valign;
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GstTextRenderHAlign halign;
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GstTextRenderLineAlign line_align;
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gint xpad;
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gint ypad;
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GstEvent *segment_event;
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};
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struct _GstTextRenderClass {
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GstElementClass parent_class;
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PangoContext *pango_context;
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};
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GType gst_text_render_get_type(void) G_GNUC_CONST;
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G_END_DECLS
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#endif /* __GST_TEXT_RENDER_H */
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