bbac324356
_cogl_atlas_new now has two extra parameters to specify the format of the textures it creates as well as a set of flags to modify the behavious of the atlas. One of the flags causes the new textures to be cleared and the other causes migration to avoid actually copying the textures. This is needed to use CoglAtlas from the pango glyph cache because it needs to use COGL_PIXEL_A_8 and to clear the textures as it does not fill in the gaps between glyphs. It needs to avoid copying the textures so that it can work on GL implementations without FBO support.
96 lines
2.9 KiB
C
96 lines
2.9 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) 2010 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __COGL_ATLAS_H
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#define __COGL_ATLAS_H
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#include "cogl-rectangle-map.h"
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#include "cogl-callback-list.h"
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typedef void
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(* CoglAtlasUpdatePositionCallback) (void *user_data,
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CoglHandle new_texture,
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const CoglRectangleMapEntry *rect);
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typedef enum
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{
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COGL_ATLAS_CLEAR_TEXTURE = (1 << 0),
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COGL_ATLAS_DISABLE_MIGRATION = (1 << 1)
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} CoglAtlasFlags;
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typedef struct _CoglAtlas CoglAtlas;
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struct _CoglAtlas
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{
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CoglRectangleMap *map;
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CoglHandle texture;
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CoglPixelFormat texture_format;
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CoglAtlasFlags flags;
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CoglAtlasUpdatePositionCallback update_position_cb;
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CoglCallbackList reorganize_callbacks;
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};
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CoglAtlas *
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_cogl_atlas_new (CoglPixelFormat texture_format,
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CoglAtlasFlags flags,
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CoglAtlasUpdatePositionCallback update_position_cb);
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gboolean
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_cogl_atlas_reserve_space (CoglAtlas *atlas,
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unsigned int width,
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unsigned int height,
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void *user_data);
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void
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_cogl_atlas_remove (CoglAtlas *atlas,
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const CoglRectangleMapEntry *rectangle);
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void
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_cogl_atlas_free (CoglAtlas *atlas);
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CoglHandle
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_cogl_atlas_copy_rectangle (CoglAtlas *atlas,
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unsigned int x,
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unsigned int y,
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unsigned int width,
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unsigned int height,
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CoglTextureFlags flags,
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CoglPixelFormat format);
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CoglAtlas *
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_cogl_atlas_get_default (void);
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void
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_cogl_atlas_add_reorganize_callback (CoglAtlas *atlas,
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CoglCallbackListFunc callback,
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void *user_data);
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void
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_cogl_atlas_remove_reorganize_callback (CoglAtlas *atlas,
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CoglCallbackListFunc callback,
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void *user_data);
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#endif /* __COGL_ATLAS_H */
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