579db9083d
This updates the Cogl Pango api to no longer require a default context and also cleans up the public api a bit. The CoglPangoRenderer type has been made private to be consistent with other pango backends where the renderer is merely an implementation detail. The drawing apis such as cogl_pango_render_layout where made more consistent with other pango backend apis so we now have replacements like cogl_pango_show_layout(). Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit bba2defe8c08a498b2dcb84bcf5b5a33f16eed27) Note: API changes were reverting in cherry-picking this patch
247 lines
7.5 KiB
C
247 lines
7.5 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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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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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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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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#ifndef __COGL_PANGO_H__
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#define __COGL_PANGO_H__
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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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#include <cogl/cogl.h>
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COGL_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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* @context: A #CoglContext
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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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* Since: 2.0
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*/
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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 #PangoContext for the given @font_map.
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*
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* Returns: the newly created context: free with g_object_unref().
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*/
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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. This is a scale factor
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* between points specified in a #PangoFontDescription 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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* Since: 2.0
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*/
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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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* Since: 1.0
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*/
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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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* Since: 1.0
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*/
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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 #PangoLayout.
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*
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* Since: 1.0
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*/
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void
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cogl_pango_font_map_set_use_mipmapping (CoglPangoFontMap *font_map,
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CoglBool 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 #CoglPangoRenderer 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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* Since: 1.0
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*/
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CoglBool
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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 #CoglPangoRenderer 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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* Since: 1.0
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*/
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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:
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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
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* space.
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*
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* Since: 2.0
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*/
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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_render_layout_line:
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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
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* space.
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*
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* Since: 2.0
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*/
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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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GType cogl_pango_renderer_get_type (void) G_GNUC_CONST;
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void
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cogl_pango_render_layout_subpixel (PangoLayout *layout,
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int x,
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int y,
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const CoglColor *color,
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int flags);
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void
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cogl_pango_render_layout (PangoLayout *layout,
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int x,
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int y,
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const CoglColor *color,
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int flags);
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/**
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* cogl_pango_render_layout_line:
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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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* Renders @line at the given coordinates using the given color.
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*
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* Since: 1.0
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*/
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void
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cogl_pango_render_layout_line (PangoLayoutLine *line,
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int x,
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int y,
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const CoglColor *color);
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COGL_END_DECLS
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#endif /* __COGL_PANGO_H__ */
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