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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.
93 lines
2.2 KiB
C
93 lines
2.2 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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#ifndef __COGL_TEXTURE_PIXMAP_X11_PRIVATE_H
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#define __COGL_TEXTURE_PIXMAP_X11_PRIVATE_H
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#include <X11/Xlib.h>
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#include <X11/extensions/XShm.h>
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#include <X11/extensions/Xdamage.h>
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#include <sys/shm.h>
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#ifdef COGL_HAS_GLX_SUPPORT
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#include <GL/glx.h>
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#endif
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#include "cogl-handle.h"
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#include "cogl-texture-private.h"
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#define COGL_TEXTURE_PIXMAP_X11(tex) ((CoglTexturePixmapX11 *) tex)
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typedef struct _CoglDamageRectangle CoglDamageRectangle;
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struct _CoglDamageRectangle
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{
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unsigned int x1;
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unsigned int y1;
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unsigned int x2;
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unsigned int y2;
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};
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typedef struct _CoglTexturePixmapX11 CoglTexturePixmapX11;
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struct _CoglTexturePixmapX11
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{
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CoglTexture _parent;
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Pixmap pixmap;
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CoglHandle tex;
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unsigned int depth;
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Visual *visual;
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unsigned int width;
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unsigned int height;
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XImage *image;
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XShmSegmentInfo shm_info;
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Damage damage;
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CoglTexturePixmapX11ReportLevel damage_report_level;
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gboolean damage_owned;
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CoglDamageRectangle damage_rect;
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#ifdef COGL_HAS_GLX_SUPPORT
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/* During the pre_paint method, this will be set to TRUE if we
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should use the GLX texture, otherwise we will use the regular
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texture */
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gboolean use_glx_texture;
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CoglHandle glx_tex;
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GLXPixmap glx_pixmap;
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gboolean glx_pixmap_has_mipmap;
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gboolean glx_can_mipmap;
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gboolean bind_tex_image_queued;
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gboolean pixmap_bound;
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#endif
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};
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GQuark
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_cogl_handle_texture_pixmap_x11_get_type (void);
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#endif /* __COGL_TEXTURE_PIXMAP_X11_PRIVATE_H */
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