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mutter/cogl/cogl-atlas-texture-private.h

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cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2009 Intel Corporation.
*
* 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
Remove mentions of the FSF address Since using addresses that might change is something that finally the FSF acknowledge as a plausible scenario (after changing address twice), the license blurb in the source files should use the URI for getting the license in case the library did not come with it. Not that URIs cannot possibly change, but at least it's easier to set up a redirection at the same place. As a side note: this commit closes the oldes bug in Clutter's bug report tool. http://bugzilla.openedhand.com/show_bug.cgi?id=521
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*
cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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*/
#ifndef __COGL_ATLAS_TEXTURE_H
#define __COGL_ATLAS_TEXTURE_H
#include "cogl-handle.h"
#include "cogl-texture-private.h"
cogl-atlas: Rename to CoglRectangleMap This simply renames CoglAtlas to CoglRectangleMap without making any functional changes. The old 'CoglAtlas' is just a data structure for managing unused areas of a rectangle and it doesn't neccessarily have to be used for an atlas so it wasn't a very good name.
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#include "cogl-rectangle-map.h"
cogl-atlas-texture: Split out the atlas data structure Instead of storing a pointer to the CoglRectangleMap and a handle to the atlas texture in the context, there is a now a separate data structure called a CoglAtlas to manage these two. The context just contains a pointer to this. The code to reorganise the atlas has been moved from cogl-atlas-texture.c to cogl-atlas.c
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#include "cogl-atlas.h"
cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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#define COGL_ATLAS_TEXTURE(tex) ((CoglAtlasTexture *) tex)
typedef struct _CoglAtlasTexture CoglAtlasTexture;
struct _CoglAtlasTexture
{
cogl-atlas: Rename to CoglRectangleMap This simply renames CoglAtlas to CoglRectangleMap without making any functional changes. The old 'CoglAtlas' is just a data structure for managing unused areas of a rectangle and it doesn't neccessarily have to be used for an atlas so it wasn't a very good name.
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CoglTexture _parent;
cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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/* The format that the texture is in. This isn't necessarily the
same format as the atlas texture because we can store
pre-multiplied and non-pre-multiplied textures together */
cogl-atlas: Rename to CoglRectangleMap This simply renames CoglAtlas to CoglRectangleMap without making any functional changes. The old 'CoglAtlas' is just a data structure for managing unused areas of a rectangle and it doesn't neccessarily have to be used for an atlas so it wasn't a very good name.
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CoglPixelFormat format;
cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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/* The rectangle that was used to add this texture to the
atlas. This includes the 1-pixel border */
cogl-atlas: Rename to CoglRectangleMap This simply renames CoglAtlas to CoglRectangleMap without making any functional changes. The old 'CoglAtlas' is just a data structure for managing unused areas of a rectangle and it doesn't neccessarily have to be used for an atlas so it wasn't a very good name.
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CoglRectangleMapEntry rectangle;
cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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Allow multiple CoglAtlases for textures Previously Cogl would only ever use one atlas for textures and if it reached the maximum texture size then all other new textures would get their own GL texture. This patch makes it so that we create as many atlases as needed. This should avoid breaking up some batches and it will be particularly good if we switch to always using multi-texturing with a default shader that selects between multiple atlases using a vertex attribute. Whenever a new atlas is created it is stored in a GSList on the context. A weak weference is taken on the atlas using cogl_object_set_user_data so that it can be removed from the list when the atlas is destroyed. The atlas textures themselves take a reference to the atlas and this is the only thing that keeps the atlas alive. This means that once the atlas becomes empty it will automatically be destroyed. All of the COGL_NOTEs pertaining to atlases are now prefixed with the atlas pointer to make it clearer which atlas is changing.
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/* The atlas that this texture is in. If the texture is no longer in
an atlas then this will be NULL. A reference is taken on the
atlas by the texture (but not vice versa so there is no cycle) */
CoglAtlas *atlas;
cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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/* A CoglSubTexture representing the region for easy rendering */
cogl-atlas: Rename to CoglRectangleMap This simply renames CoglAtlas to CoglRectangleMap without making any functional changes. The old 'CoglAtlas' is just a data structure for managing unused areas of a rectangle and it doesn't neccessarily have to be used for an atlas so it wasn't a very good name.
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CoglHandle sub_texture;
cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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};
GQuark
_cogl_handle_atlas_texture_get_type (void);
CoglHandle
cogl-bitmap: Encapsulate the CoglBitmap even internally The CoglBitmap struct is now only defined within cogl-bitmap.c so that all of its members can now only be accessed with accessor functions. To get to the data pointer for the bitmap image you must first call _cogl_bitmap_map and later call _cogl_bitmap_unmap. The map function takes the same arguments as cogl_pixel_array_map so that eventually we can make a bitmap optionally internally divert to a pixel array. There is a _cogl_bitmap_new_from_data function which constructs a new bitmap object and takes ownership of the data pointer. The function gets passed a destroy callback which gets called when the bitmap is freed. This is similar to how gdk_pixbuf_new_from_data works. Alternatively NULL can be passed for the destroy function which means that the caller will manage the life of the pointer (but must guarantee that it stays alive at least until the bitmap is freed). This mechanism is used instead of the old approach of creating a CoglBitmap struct on the stack and manually filling in the members. It could also later be used to create a CoglBitmap that owns a GdkPixbuf ref so that we don't necessarily have to copy the GdkPixbuf data when converting to a bitmap. There is also _cogl_bitmap_new_shared. This creates a bitmap using a reference to another CoglBitmap for the data. This is a bit of a hack but it is needed by the atlas texture backend which wants to divert the set_region virtual to another texture but it needs to override the format of the bitmap to ignore the premult flag.
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_cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
cogl: Add an atlased texture backend This adds a CoglAtlas type which is a data structure that keeps track of unused sub rectangles of a larger rectangle. There is a new atlased texture backend which uses this to put multiple textures into a single larger texture. Currently the atlas is always sized 256x256 and the textures are never moved once they are put in. Eventually it needs to be able to reorganise the atlas and grow it if necessary. It also needs to migrate the textures out of the atlas if mipmaps are required.
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CoglTextureFlags flags,
CoglPixelFormat internal_format);
#endif /* __COGL_ATLAS_TEXTURE_H */
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