Class

PangoRenderer

Description [src] 

abstract class Pango.Renderer : GObject.Object {
  matrix: PangoMatrix*
}

PangoRenderer is a base class for objects that can render text provided as PangoGlyphString or PangoLayout.

By subclassing PangoRenderer and overriding operations such as draw_glyphs and draw_rectangle, renderers for particular font backends and destinations can be created.

Available since:1.8

Ancestors

Instance methods

pango_renderer_activate

Does initial setup before rendering operations on renderer.

Available since: 1.8

pango_renderer_deactivate

Cleans up after rendering operations on renderer.

Available since: 1.8

pango_renderer_draw_error_underline

Draw a squiggly line that approximately covers the given rectangle in the style of an underline used to indicate a spelling error.

Available since: 1.8

pango_renderer_draw_glyph

Draws a single glyph with coordinates in device space.

Available since: 1.8

pango_renderer_draw_glyph_item

Draws the glyphs in glyph_item with the specified PangoRenderer, embedding the text associated with the glyphs in the output if the output format supports it.

Available since: 1.22

pango_renderer_draw_glyphs

Draws the glyphs in glyphs with the specified PangoRenderer.

Available since: 1.8

pango_renderer_draw_layout

Draws layout with the specified PangoRenderer.

Available since: 1.8

pango_renderer_draw_layout_line

Draws line with the specified PangoRenderer.

Available since: 1.8

pango_renderer_draw_rectangle

Draws an axis-aligned rectangle in user space coordinates with the specified PangoRenderer.

Available since: 1.8

pango_renderer_draw_trapezoid

Draws a trapezoid with the parallel sides aligned with the X axis using the given PangoRenderer; coordinates are in device space.

Available since: 1.8

pango_renderer_get_alpha

Gets the current alpha for the specified part.

Available since: 1.38

pango_renderer_get_color

Gets the current rendering color for the specified part.

Available since: 1.8

pango_renderer_get_layout

Gets the layout currently being rendered using renderer.

Available since: 1.20

pango_renderer_get_layout_line

Gets the layout line currently being rendered using renderer.

Available since: 1.20

pango_renderer_get_matrix

Gets the transformation matrix that will be applied when rendering.

Available since: 1.8

pango_renderer_part_changed

Informs Pango that the way that the rendering is done for part has changed.

Available since: 1.8

pango_renderer_set_alpha

Sets the alpha for part of the rendering.

Available since: 1.38

pango_renderer_set_color

Sets the color for part of the rendering.

Available since: 1.8

pango_renderer_set_matrix

Sets the transformation matrix that will be applied when rendering.

Available since: 1.8

Methods inherited from GObject (42)

Please see GObject for a full list of methods.

Signals

Signals inherited from GObject (1)
GObject.Object::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

Class structure 

struct PangoRendererClass {
  void (* draw_glyphs) (
    PangoRenderer* renderer,
    PangoFont* font,
    PangoGlyphString* glyphs,
    int x,
    int y
  );
  void (* draw_rectangle) (
    PangoRenderer* renderer,
    PangoRenderPart part,
    int x,
    int y,
    int width,
    int height
  );
  void (* draw_error_underline) (
    PangoRenderer* renderer,
    int x,
    int y,
    int width,
    int height
  );
  void (* draw_shape) (
    PangoRenderer* renderer,
    PangoAttrShape* attr,
    int x,
    int y
  );
  void (* draw_trapezoid) (
    PangoRenderer* renderer,
    PangoRenderPart part,
    double y1_,
    double x11,
    double x21,
    double y2,
    double x12,
    double x22
  );
  void (* draw_glyph) (
    PangoRenderer* renderer,
    PangoFont* font,
    PangoGlyph glyph,
    double x,
    double y
  );
  void (* part_changed) (
    PangoRenderer* renderer,
    PangoRenderPart part
  );
  void (* begin) (
    PangoRenderer* renderer
  );
  void (* end) (
    PangoRenderer* renderer
  );
  void (* prepare_run) (
    PangoRenderer* renderer,
    PangoLayoutRun* run
  );
  void (* draw_glyph_item) (
    PangoRenderer* renderer,
    const char* text,
    PangoGlyphItem* glyph_item,
    int x,
    int y
  );
  void (* _pango_reserved2) (
void
  );
  void (* _pango_reserved3) (
void
  );
  void (* _pango_reserved4) (
void
  );
  
}

Class structure for PangoRenderer.

The following vfuncs take user space coordinates in Pango units and have default implementations: - draw_glyphs - draw_rectangle - draw_error_underline - draw_shape - draw_glyph_item

The default draw_shape implementation draws nothing.

The following vfuncs take device space coordinates as doubles and must be implemented: - draw_trapezoid - draw_glyph.

Class members
draw_glyphs 
void (* draw_glyphs) (
    PangoRenderer* renderer,
    PangoFont* font,
    PangoGlyphString* glyphs,
    int x,
    int y
  )
  No description available.
draw_rectangle 
void (* draw_rectangle) (
    PangoRenderer* renderer,
    PangoRenderPart part,
    int x,
    int y,
    int width,
    int height
  )
  No description available.
draw_error_underline 
void (* draw_error_underline) (
    PangoRenderer* renderer,
    int x,
    int y,
    int width,
    int height
  )
  No description available.
draw_shape 
void (* draw_shape) (
    PangoRenderer* renderer,
    PangoAttrShape* attr,
    int x,
    int y
  )
  No description available.
draw_trapezoid 
void (* draw_trapezoid) (
    PangoRenderer* renderer,
    PangoRenderPart part,
    double y1_,
    double x11,
    double x21,
    double y2,
    double x12,
    double x22
  )
  No description available.
draw_glyph 
void (* draw_glyph) (
    PangoRenderer* renderer,
    PangoFont* font,
    PangoGlyph glyph,
    double x,
    double y
  )
  No description available.
part_changed 
void (* part_changed) (
    PangoRenderer* renderer,
    PangoRenderPart part
  )
  No description available.
begin 
void (* begin) (
    PangoRenderer* renderer
  )
  No description available.
end 
void (* end) (
    PangoRenderer* renderer
  )
  No description available.
prepare_run 
void (* prepare_run) (
    PangoRenderer* renderer,
    PangoLayoutRun* run
  )
  No description available.
draw_glyph_item 
void (* draw_glyph_item) (
    PangoRenderer* renderer,
    const char* text,
    PangoGlyphItem* glyph_item,
    int x,
    int y
  )
  No description available.
_pango_reserved2 
void (* _pango_reserved2) (
void
  )
  No description available.
_pango_reserved3 
void (* _pango_reserved3) (
void
  )
  No description available.
_pango_reserved4 
void (* _pango_reserved4) (
void
  )
  No description available.

Virtual methods

Pango.RendererClass.begin
No description available.
Pango.RendererClass.draw_error_underline

Draw a squiggly line that approximately covers the given rectangle in the style of an underline used to indicate a spelling error.

Available since: 1.8

Pango.RendererClass.draw_glyph

Draws a single glyph with coordinates in device space.

Available since: 1.8

Pango.RendererClass.draw_glyph_item

Draws the glyphs in glyph_item with the specified PangoRenderer, embedding the text associated with the glyphs in the output if the output format supports it.

Available since: 1.22

Pango.RendererClass.draw_glyphs

Draws the glyphs in glyphs with the specified PangoRenderer.

Available since: 1.8

Pango.RendererClass.draw_rectangle

Draws an axis-aligned rectangle in user space coordinates with the specified PangoRenderer.

Available since: 1.8

Pango.RendererClass.draw_shape
No description available.
Pango.RendererClass.draw_trapezoid

Draws a trapezoid with the parallel sides aligned with the X axis using the given PangoRenderer; coordinates are in device space.

Available since: 1.8

Pango.RendererClass.end
No description available.
Pango.RendererClass.part_changed

Informs Pango that the way that the rendering is done for part has changed.

Available since: 1.8

Pango.RendererClass.prepare_run
No description available.