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This is a publicly exposed texture backend to create a texture which
contains the contents of an X11 pixmap. The API is currently marked as
experimental.
The backend internally holds a handle to another texture. All of the
backend virtuals simply redirect to the internal texture.
The texture can optionally be automatically updated if the
automatic_updates parameter is TRUE. If set then Cogl will listen for
damage events on the pixmap and update the texture accordingly.
Alternatively a damage object can be created externally and passed
down to Cogl.
The updates can be performed with XGetImage, XShmGetImage or the
GLX_EXT_texture_pixmap extension. If the TFP extension is used it will
optionally try to create a rectangle texture if the driver does not
support NPOTs or it is forced through the
COGL_PIXMAP_TEXTURE_RECTANGLE or CLUTTER_PIXMAP_TEXTURE_RECTANGLE
environment variables.
If the GLXFBConfig does not support mipmapping then it will fallback
to using X{Shm,}GetImage. It keeps a separate texture around for this
so that it can later start using the TFP texture again if the texture
is later drawn with mipmaps disabled.
46 lines
1.7 KiB
C
46 lines
1.7 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, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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/* This can be included multiple times with different definitions for
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the COGL_WINSYS_FEATURE_* functions */
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#ifdef COGL_HAS_GLX_SUPPORT
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COGL_WINSYS_FEATURE_BEGIN (texture_from_pixmap,
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"EXT\0",
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"texture_from_pixmap\0",
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COGL_WINSYS_FEATURE_TEXTURE_FROM_PIXMAP,
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0)
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COGL_WINSYS_FEATURE_FUNCTION (void, glXBindTexImage,
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(Display *display,
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GLXDrawable drawable,
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int buffer,
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int *attribList))
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COGL_WINSYS_FEATURE_FUNCTION (void, glXReleaseTexImage,
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(Display *display,
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GLXDrawable drawable,
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int buffer))
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COGL_WINSYS_FEATURE_END ()
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#endif
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