214 lines
7.3 KiB
C
214 lines
7.3 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2008 OpenedHand
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* Copyright (C) 2012 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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* Robert Bragg <robert@linux.intel.com>
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* Matthew Allum <mallum@openedhand.com>
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*/
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#pragma once
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#include <glib-object.h>
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#include <pango/pango.h>
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#include <pango/pangocairo.h>
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/* XXX: Currently this header may be included both as an internal
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* header (within the cogl-pango implementation) and as a public
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* header.
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*
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* Since <cogl/cogl.h> should not be included for internal use we
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* determine the current context and switch between including cogl.h
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* or specific internal cogl headers here...
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*/
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#ifndef COGL_COMPILATION
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#include "cogl/cogl.h"
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#else
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#include "cogl/cogl-context.h"
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#include "cogl/cogl-macros.h"
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#endif
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G_BEGIN_DECLS
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/* It's too difficult to actually subclass the pango cairo font
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* map. Instead we just make a fake set of macros that actually just
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* directly use the original type
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*/
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#define COGL_PANGO_TYPE_FONT_MAP PANGO_TYPE_CAIRO_FONT_MAP
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#define COGL_PANGO_FONT_MAP(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), COGL_PANGO_TYPE_FONT_MAP, CoglPangoFontMap))
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#define COGL_PANGO_IS_FONT_MAP(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), COGL_PANGO_TYPE_FONT_MAP))
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typedef PangoCairoFontMap CoglPangoFontMap;
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/**
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* cogl_pango_font_map_new:
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*
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* Creates a new font map.
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*
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* Return value: (transfer full): the newly created #PangoFontMap
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*/
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COGL_EXPORT PangoFontMap *
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cogl_pango_font_map_new (void);
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/**
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* cogl_pango_font_map_create_context:
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* @font_map: a #CoglPangoFontMap
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*
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* Create a [class@Pango.Context] for the given @font_map.
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*
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* Returns: (transfer full): the newly created context: free with [method@GObject.Object.unref].
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*/
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COGL_EXPORT PangoContext *
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cogl_pango_font_map_create_context (CoglPangoFontMap *font_map);
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/**
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* cogl_pango_font_map_set_resolution:
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* @font_map: a #CoglPangoFontMap
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* @dpi: The resolution in "dots per inch". (Physical inches aren't
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* actually involved; the terminology is conventional.)
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*
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* Sets the resolution for the @font_map.
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*
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* This is a scale factor between points specified in a
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* [struct@Pango.FontDescription] and Cogl units.
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* The default value is %96, meaning that a 10 point font will be 13
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* units high. (10 * 96. / 72. = 13.3).
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*/
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COGL_EXPORT void
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cogl_pango_font_map_set_resolution (CoglPangoFontMap *font_map,
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double dpi);
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/**
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* cogl_pango_font_map_clear_glyph_cache:
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* @font_map: a #CoglPangoFontMap
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*
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* Clears the glyph cache for @font_map.
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*/
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COGL_EXPORT void
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cogl_pango_font_map_clear_glyph_cache (CoglPangoFontMap *font_map);
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/**
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* cogl_pango_ensure_glyph_cache_for_layout:
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* @layout: A #PangoLayout
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*
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* This updates any internal glyph cache textures as necessary to be
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* able to render the given @layout.
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*
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* This api should be used to avoid mid-scene modifications of
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* glyph-cache textures which can lead to undefined rendering results.
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*/
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COGL_EXPORT void
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cogl_pango_ensure_glyph_cache_for_layout (PangoLayout *layout);
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/**
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* cogl_pango_font_map_set_use_mipmapping:
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* @font_map: a #CoglPangoFontMap
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* @value: %TRUE to enable the use of mipmapping
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*
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* Sets whether the renderer for the passed font map should use
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* mipmapping when rendering a [class@Pango.Layout].
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*/
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COGL_EXPORT void
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cogl_pango_font_map_set_use_mipmapping (CoglPangoFontMap *font_map,
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gboolean value);
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/**
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* cogl_pango_font_map_get_use_mipmapping:
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* @font_map: a #CoglPangoFontMap
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*
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* Retrieves whether the [class@CoglPango.Renderer] used by @font_map will use
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* mipmapping when rendering the glyphs.
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*
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* Return value: %TRUE if mipmapping is used, %FALSE otherwise.
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*/
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COGL_EXPORT gboolean
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cogl_pango_font_map_get_use_mipmapping (CoglPangoFontMap *font_map);
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/**
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* cogl_pango_font_map_get_renderer:
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* @font_map: a #CoglPangoFontMap
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*
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* Retrieves the [class@CoglPango.Renderer] for the passed @font_map.
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*
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* Return value: (transfer none): a #PangoRenderer
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*/
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COGL_EXPORT PangoRenderer *
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cogl_pango_font_map_get_renderer (CoglPangoFontMap *font_map);
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/**
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* cogl_pango_show_layout: (skip)
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* @framebuffer: A #CoglFramebuffer to draw too.
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* @layout: a #PangoLayout
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* @x: X coordinate to render the layout at
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* @y: Y coordinate to render the layout at
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* @color: color to use when rendering the layout
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*
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* Draws a solidly coloured @layout on the given @framebuffer at (@x,
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* @y) within the `framebuffer`'s current model-view coordinate space.
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*/
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COGL_EXPORT void
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cogl_pango_show_layout (CoglFramebuffer *framebuffer,
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PangoLayout *layout,
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float x,
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float y,
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const CoglColor *color);
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/**
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* cogl_pango_show_layout_line: (skip)
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* @framebuffer: A #CoglFramebuffer to draw too.
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* @line: a #PangoLayoutLine
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* @x: X coordinate to render the line at
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* @y: Y coordinate to render the line at
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* @color: color to use when rendering the line
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*
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* Draws a solidly coloured @line on the given @framebuffer at (@x,
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* @y) within the `framebuffer`'s current model-view coordinate space.
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*/
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COGL_EXPORT void
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cogl_pango_show_layout_line (CoglFramebuffer *framebuffer,
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PangoLayoutLine *line,
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float x,
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float y,
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const CoglColor *color);
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#define COGL_PANGO_TYPE_RENDERER (cogl_pango_renderer_get_type ())
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#define COGL_PANGO_RENDERER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), COGL_PANGO_TYPE_RENDERER, CoglPangoRenderer))
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#define COGL_PANGO_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), COGL_PANGO_TYPE_RENDERER, CoglPangoRendererClass))
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#define COGL_PANGO_IS_RENDERER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), COGL_PANGO_TYPE_RENDERER))
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#define COGL_PANGO_IS_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), COGL_PANGO_TYPE_RENDERER))
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#define COGL_PANGO_RENDERER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), COGL_PANGO_TYPE_RENDERER, CoglPangoRendererClass))
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/* opaque types */
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typedef struct _CoglPangoRenderer CoglPangoRenderer;
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typedef struct _CoglPangoRendererClass CoglPangoRendererClass;
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COGL_EXPORT GType cogl_pango_renderer_get_type (void) G_GNUC_CONST;
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G_END_DECLS
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