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mutter/clutter/cogl/pango/cogl-pango-glyph-cache.h

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2008-10-30 Emmanuele Bassi <ebassi@linux.intel.com> Bug 1215 - Move the Pango renderer to the public API * clutter/pango/*: Rename PangoClutter -> CoglPango. * clutter/Makefile.am: * clutter/clutter-backend.c: * clutter/clutter-entry.c: * clutter/clutter-label.c: * clutter/clutter-main.[ch]: * clutter/clutter-private.h: Update the users of the Pango renderer API. * README: Update release notes.
2008-10-30 17:11:29 +00:00
/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2008 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __COGL_PANGO_GLYPH_CACHE_H__
#define __COGL_PANGO_GLYPH_CACHE_H__
#include <glib.h>
#include <cogl/cogl.h>
#include <pango/pango-font.h>
G_BEGIN_DECLS
typedef struct _CoglPangoGlyphCache CoglPangoGlyphCache;
typedef struct _CoglPangoGlyphCacheValue CoglPangoGlyphCacheValue;
struct _CoglPangoGlyphCacheValue
{
CoglHandle texture;
cogl-pango: Use a CoglAtlas to maintain the glyph cache The glyph cache is now stored in a CoglAtlas structure instead of the custom atlasing code. This has the advantage that it can share code with the main texture atlas and that it supports reorganizing the atlas when it becomes full. Unlike the texture atlas, the glyph cache can use multiple atlases which would be neccessary if the maximum texture size is reached and we need to create a second texture. Whenever a display list is created it now has to register a callback with the glyph cache so that the display list can be recreated whenever any of the atlases are reorganized. This is needed because the display list directly stores texture coordinates within the atlas texture and they would become invalid when the texture is moved. The ensure_glyphs_for_layout now works in two steps. First it reserves space in the atlas for all of the glyphs. The atlas is created with the DISABLE_MIGRATION flag so that it won't actually copy any textures if any rearranging is needed. Whenever the position is updated for a glyph then it is marked as dirty. After space for all of the glyphs has been reserved it will iterate over all dirty glyphs and redraw them using Cairo. The rendered glyph is then stored in the texture with a sub texture update. The glyphs need to all be set at the right location before starting to create the display list because the display list stores the texture coordinates of the glyph. If any of the glyphs were moved around then the parts of the display list that was created already would become invalid. To make this work, ensure_glyphs_for_layout is now always called before rendering a layout or a layout line.
2010-08-04 17:05:21 +00:00
float tx1;
float ty1;
float tx2;
float ty2;
int tx_pixel;
int ty_pixel;
2008-10-30 Emmanuele Bassi <ebassi@linux.intel.com> Bug 1215 - Move the Pango renderer to the public API * clutter/pango/*: Rename PangoClutter -> CoglPango. * clutter/Makefile.am: * clutter/clutter-backend.c: * clutter/clutter-entry.c: * clutter/clutter-label.c: * clutter/clutter-main.[ch]: * clutter/clutter-private.h: Update the users of the Pango renderer API. * README: Update release notes.
2008-10-30 17:11:29 +00:00
int draw_x;
int draw_y;
int draw_width;
int draw_height;
cogl-pango: Use a CoglAtlas to maintain the glyph cache The glyph cache is now stored in a CoglAtlas structure instead of the custom atlasing code. This has the advantage that it can share code with the main texture atlas and that it supports reorganizing the atlas when it becomes full. Unlike the texture atlas, the glyph cache can use multiple atlases which would be neccessary if the maximum texture size is reached and we need to create a second texture. Whenever a display list is created it now has to register a callback with the glyph cache so that the display list can be recreated whenever any of the atlases are reorganized. This is needed because the display list directly stores texture coordinates within the atlas texture and they would become invalid when the texture is moved. The ensure_glyphs_for_layout now works in two steps. First it reserves space in the atlas for all of the glyphs. The atlas is created with the DISABLE_MIGRATION flag so that it won't actually copy any textures if any rearranging is needed. Whenever the position is updated for a glyph then it is marked as dirty. After space for all of the glyphs has been reserved it will iterate over all dirty glyphs and redraw them using Cairo. The rendered glyph is then stored in the texture with a sub texture update. The glyphs need to all be set at the right location before starting to create the display list because the display list stores the texture coordinates of the glyph. If any of the glyphs were moved around then the parts of the display list that was created already would become invalid. To make this work, ensure_glyphs_for_layout is now always called before rendering a layout or a layout line.
2010-08-04 17:05:21 +00:00
/* This will be set to TRUE when the glyph atlas is reorganized
which means the glyph will need to be redrawn */
gboolean dirty;
2008-10-30 Emmanuele Bassi <ebassi@linux.intel.com> Bug 1215 - Move the Pango renderer to the public API * clutter/pango/*: Rename PangoClutter -> CoglPango. * clutter/Makefile.am: * clutter/clutter-backend.c: * clutter/clutter-entry.c: * clutter/clutter-label.c: * clutter/clutter-main.[ch]: * clutter/clutter-private.h: Update the users of the Pango renderer API. * README: Update release notes.
2008-10-30 17:11:29 +00:00
};
cogl-pango: Use a CoglAtlas to maintain the glyph cache The glyph cache is now stored in a CoglAtlas structure instead of the custom atlasing code. This has the advantage that it can share code with the main texture atlas and that it supports reorganizing the atlas when it becomes full. Unlike the texture atlas, the glyph cache can use multiple atlases which would be neccessary if the maximum texture size is reached and we need to create a second texture. Whenever a display list is created it now has to register a callback with the glyph cache so that the display list can be recreated whenever any of the atlases are reorganized. This is needed because the display list directly stores texture coordinates within the atlas texture and they would become invalid when the texture is moved. The ensure_glyphs_for_layout now works in two steps. First it reserves space in the atlas for all of the glyphs. The atlas is created with the DISABLE_MIGRATION flag so that it won't actually copy any textures if any rearranging is needed. Whenever the position is updated for a glyph then it is marked as dirty. After space for all of the glyphs has been reserved it will iterate over all dirty glyphs and redraw them using Cairo. The rendered glyph is then stored in the texture with a sub texture update. The glyphs need to all be set at the right location before starting to create the display list because the display list stores the texture coordinates of the glyph. If any of the glyphs were moved around then the parts of the display list that was created already would become invalid. To make this work, ensure_glyphs_for_layout is now always called before rendering a layout or a layout line.
2010-08-04 17:05:21 +00:00
typedef void (* CoglPangoGlyphCacheDirtyFunc) (PangoFont *font,
PangoGlyph glyph,
CoglPangoGlyphCacheValue *value);
2008-10-30 Emmanuele Bassi <ebassi@linux.intel.com> Bug 1215 - Move the Pango renderer to the public API * clutter/pango/*: Rename PangoClutter -> CoglPango. * clutter/Makefile.am: * clutter/clutter-backend.c: * clutter/clutter-entry.c: * clutter/clutter-label.c: * clutter/clutter-main.[ch]: * clutter/clutter-private.h: Update the users of the Pango renderer API. * README: Update release notes.
2008-10-30 17:11:29 +00:00
CoglPangoGlyphCache *
[cogl] Move the texture filters to be a property of the material layer The texture filters are now a property of the material layer rather than the texture object. Whenever a texture is painted with a material it sets the filters on all of the GL textures in the Cogl texture. The filter is cached so that it won't be changed unnecessarily. The automatic mipmap generation has changed so that the mipmaps are only generated when the texture is painted instead of every time the data changes. Changing the texture sets a flag to mark that the mipmaps are dirty. This works better if the FBO extension is available because we can use glGenerateMipmap. If the extension is not available it will temporarily enable automatic mipmap generation and reupload the first pixel of each slice. This requires tracking the data for the first pixel. The COGL_TEXTURE_AUTO_MIPMAP flag has been replaced with COGL_TEXTURE_NO_AUTO_MIPMAP so that it will default to auto-mipmapping. The mipmap generation is now effectively free if you are not using a mipmap filter mode so you would only want to disable it if you had some special reason to generate your own mipmaps. ClutterTexture no longer has to store its own copy of the filter mode. Instead it stores it in the material and the property is directly set and read from that. This fixes problems with the filters getting out of sync when a cogl handle is set on the texture directly. It also avoids the mess of having to rerealize the texture if the filter quality changes to HIGH because Cogl will take of generating the mipmaps if needed.
2009-06-04 15:04:57 +00:00
cogl_pango_glyph_cache_new (void);
2008-10-30 Emmanuele Bassi <ebassi@linux.intel.com> Bug 1215 - Move the Pango renderer to the public API * clutter/pango/*: Rename PangoClutter -> CoglPango. * clutter/Makefile.am: * clutter/clutter-backend.c: * clutter/clutter-entry.c: * clutter/clutter-label.c: * clutter/clutter-main.[ch]: * clutter/clutter-private.h: Update the users of the Pango renderer API. * README: Update release notes.
2008-10-30 17:11:29 +00:00
void
cogl_pango_glyph_cache_free (CoglPangoGlyphCache *cache);
CoglPangoGlyphCacheValue *
cogl_pango_glyph_cache_lookup (CoglPangoGlyphCache *cache,
cogl-pango: Use a CoglAtlas to maintain the glyph cache The glyph cache is now stored in a CoglAtlas structure instead of the custom atlasing code. This has the advantage that it can share code with the main texture atlas and that it supports reorganizing the atlas when it becomes full. Unlike the texture atlas, the glyph cache can use multiple atlases which would be neccessary if the maximum texture size is reached and we need to create a second texture. Whenever a display list is created it now has to register a callback with the glyph cache so that the display list can be recreated whenever any of the atlases are reorganized. This is needed because the display list directly stores texture coordinates within the atlas texture and they would become invalid when the texture is moved. The ensure_glyphs_for_layout now works in two steps. First it reserves space in the atlas for all of the glyphs. The atlas is created with the DISABLE_MIGRATION flag so that it won't actually copy any textures if any rearranging is needed. Whenever the position is updated for a glyph then it is marked as dirty. After space for all of the glyphs has been reserved it will iterate over all dirty glyphs and redraw them using Cairo. The rendered glyph is then stored in the texture with a sub texture update. The glyphs need to all be set at the right location before starting to create the display list because the display list stores the texture coordinates of the glyph. If any of the glyphs were moved around then the parts of the display list that was created already would become invalid. To make this work, ensure_glyphs_for_layout is now always called before rendering a layout or a layout line.
2010-08-04 17:05:21 +00:00
gboolean create,
2008-10-30 Emmanuele Bassi <ebassi@linux.intel.com> Bug 1215 - Move the Pango renderer to the public API * clutter/pango/*: Rename PangoClutter -> CoglPango. * clutter/Makefile.am: * clutter/clutter-backend.c: * clutter/clutter-entry.c: * clutter/clutter-label.c: * clutter/clutter-main.[ch]: * clutter/clutter-private.h: Update the users of the Pango renderer API. * README: Update release notes.
2008-10-30 17:11:29 +00:00
PangoFont *font,
PangoGlyph glyph);
void
cogl_pango_glyph_cache_clear (CoglPangoGlyphCache *cache);
cogl-pango: Use a CoglAtlas to maintain the glyph cache The glyph cache is now stored in a CoglAtlas structure instead of the custom atlasing code. This has the advantage that it can share code with the main texture atlas and that it supports reorganizing the atlas when it becomes full. Unlike the texture atlas, the glyph cache can use multiple atlases which would be neccessary if the maximum texture size is reached and we need to create a second texture. Whenever a display list is created it now has to register a callback with the glyph cache so that the display list can be recreated whenever any of the atlases are reorganized. This is needed because the display list directly stores texture coordinates within the atlas texture and they would become invalid when the texture is moved. The ensure_glyphs_for_layout now works in two steps. First it reserves space in the atlas for all of the glyphs. The atlas is created with the DISABLE_MIGRATION flag so that it won't actually copy any textures if any rearranging is needed. Whenever the position is updated for a glyph then it is marked as dirty. After space for all of the glyphs has been reserved it will iterate over all dirty glyphs and redraw them using Cairo. The rendered glyph is then stored in the texture with a sub texture update. The glyphs need to all be set at the right location before starting to create the display list because the display list stores the texture coordinates of the glyph. If any of the glyphs were moved around then the parts of the display list that was created already would become invalid. To make this work, ensure_glyphs_for_layout is now always called before rendering a layout or a layout line.
2010-08-04 17:05:21 +00:00
void
_cogl_pango_glyph_cache_add_reorganize_callback (CoglPangoGlyphCache *cache,
cogl: Use GHookList instead of CoglCallbackList glib already has a data type to manage a list of callbacks called a GHookList so we might as well use it instead of maintaining Cogl's own type. The glib version may be slightly more efficient because it avoids using a GList and instead encodes the prev and next pointers directly in the GHook structure. It also has more features than CoglCallbackList.
2011-03-14 17:58:31 +00:00
GHookFunc func,
cogl-pango: Use a CoglAtlas to maintain the glyph cache The glyph cache is now stored in a CoglAtlas structure instead of the custom atlasing code. This has the advantage that it can share code with the main texture atlas and that it supports reorganizing the atlas when it becomes full. Unlike the texture atlas, the glyph cache can use multiple atlases which would be neccessary if the maximum texture size is reached and we need to create a second texture. Whenever a display list is created it now has to register a callback with the glyph cache so that the display list can be recreated whenever any of the atlases are reorganized. This is needed because the display list directly stores texture coordinates within the atlas texture and they would become invalid when the texture is moved. The ensure_glyphs_for_layout now works in two steps. First it reserves space in the atlas for all of the glyphs. The atlas is created with the DISABLE_MIGRATION flag so that it won't actually copy any textures if any rearranging is needed. Whenever the position is updated for a glyph then it is marked as dirty. After space for all of the glyphs has been reserved it will iterate over all dirty glyphs and redraw them using Cairo. The rendered glyph is then stored in the texture with a sub texture update. The glyphs need to all be set at the right location before starting to create the display list because the display list stores the texture coordinates of the glyph. If any of the glyphs were moved around then the parts of the display list that was created already would become invalid. To make this work, ensure_glyphs_for_layout is now always called before rendering a layout or a layout line.
2010-08-04 17:05:21 +00:00
void *user_data);
void
_cogl_pango_glyph_cache_remove_reorganize_callback (CoglPangoGlyphCache *cache,
cogl: Use GHookList instead of CoglCallbackList glib already has a data type to manage a list of callbacks called a GHookList so we might as well use it instead of maintaining Cogl's own type. The glib version may be slightly more efficient because it avoids using a GList and instead encodes the prev and next pointers directly in the GHook structure. It also has more features than CoglCallbackList.
2011-03-14 17:58:31 +00:00
GHookFunc func,
cogl-pango: Use a CoglAtlas to maintain the glyph cache The glyph cache is now stored in a CoglAtlas structure instead of the custom atlasing code. This has the advantage that it can share code with the main texture atlas and that it supports reorganizing the atlas when it becomes full. Unlike the texture atlas, the glyph cache can use multiple atlases which would be neccessary if the maximum texture size is reached and we need to create a second texture. Whenever a display list is created it now has to register a callback with the glyph cache so that the display list can be recreated whenever any of the atlases are reorganized. This is needed because the display list directly stores texture coordinates within the atlas texture and they would become invalid when the texture is moved. The ensure_glyphs_for_layout now works in two steps. First it reserves space in the atlas for all of the glyphs. The atlas is created with the DISABLE_MIGRATION flag so that it won't actually copy any textures if any rearranging is needed. Whenever the position is updated for a glyph then it is marked as dirty. After space for all of the glyphs has been reserved it will iterate over all dirty glyphs and redraw them using Cairo. The rendered glyph is then stored in the texture with a sub texture update. The glyphs need to all be set at the right location before starting to create the display list because the display list stores the texture coordinates of the glyph. If any of the glyphs were moved around then the parts of the display list that was created already would become invalid. To make this work, ensure_glyphs_for_layout is now always called before rendering a layout or a layout line.
2010-08-04 17:05:21 +00:00
void *user_data);
void
_cogl_pango_glyph_cache_set_dirty_glyphs (CoglPangoGlyphCache *cache,
CoglPangoGlyphCacheDirtyFunc func);
2008-10-30 Emmanuele Bassi <ebassi@linux.intel.com> Bug 1215 - Move the Pango renderer to the public API * clutter/pango/*: Rename PangoClutter -> CoglPango. * clutter/Makefile.am: * clutter/clutter-backend.c: * clutter/clutter-entry.c: * clutter/clutter-label.c: * clutter/clutter-main.[ch]: * clutter/clutter-private.h: Update the users of the Pango renderer API. * README: Update release notes.
2008-10-30 17:11:29 +00:00
G_END_DECLS
#endif /* __COGL_PANGO_GLYPH_CACHE_H__ */
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