Class
PangoRenderer
since: 1.8
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
Instance methods
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.
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.
since: 1.22
pango_renderer_draw_rectangle
Draws an axis-aligned rectangle in user space coordinates with the
specified PangoRenderer.
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.
since: 1.8
pango_renderer_get_layout_line
Gets the layout line currently being rendered using renderer.
since: 1.20
pango_renderer_get_matrix
Gets the transformation matrix that will be applied when rendering.
since: 1.8
pango_renderer_part_changed
Informs Pango that the way that the rendering is done
for part has changed.
since: 1.8
pango_renderer_set_matrix
Sets the transformation matrix that will be applied when rendering.
since: 1.8
Signals
Signals inherited from GObject (1)
GObject::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.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.
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.
since: 1.22
Pango.RendererClass.draw_glyphs
Draws the glyphs in glyphs with the specified PangoRenderer.
since: 1.8
Pango.RendererClass.draw_rectangle
Draws an axis-aligned rectangle in user space coordinates with the
specified PangoRenderer.
since: 1.8
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.
since: 1.8
Pango.RendererClass.part_changed
Informs Pango that the way that the rendering is done
for part has changed.
since: 1.8