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/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#ifndef STW_FRAMEBUFFER_H
#define STW_FRAMEBUFFER_H
#include <windows.h>
#include "os/os_thread.h"
struct pipe_resource;
struct st_framebuffer_iface;
struct stw_pixelformat_info;
/**
* Windows framebuffer, derived from gl_framebuffer.
*/
struct stw_framebuffer
{
/**
* This mutex has two purposes:
* - protect the access to the mutable data members below
* - prevent the framebuffer from being deleted while being accessed.
*
* It is OK to lock this mutex while holding the stw_device::fb_mutex lock,
* but the opposite must never happen.
*/
pipe_mutex mutex;
/*
* Immutable members.
*
* Note that even access to immutable members implies acquiring the mutex
* above, to prevent the framebuffer from being destroyed.
*/
HDC hDC;
HWND hWnd;
int iPixelFormat;
const struct stw_pixelformat_info *pfi;
struct st_framebuffer_iface *stfb;
/*
* Mutable members.
*/
unsigned refcnt;
/* FIXME: Make this work for multiple contexts bound to the same framebuffer */
boolean must_resize;
unsigned width;
unsigned height;
/**
* Client area rectangle, relative to the window upper-left corner.
*
* @sa GLCBPRESENTBUFFERSDATA::rect.
*/
RECT client_rect;
HANDLE hSharedSurface;
struct stw_shared_surface *shared_surface;
/**
* This is protected by stw_device::fb_mutex, not the mutex above.
*
* Deletions must be done by first acquiring stw_device::fb_mutex, and then
* acquiring the stw_framebuffer::mutex of the framebuffer to be deleted.
* This ensures that nobody else is reading/writing to the.
*
* It is not necessary to aquire the mutex above to navigate the linked list
* given that deletions are done with stw_device::fb_mutex held, so no other
* thread can delete.
*/
struct stw_framebuffer *next;
};
/**
* Create a new framebuffer object which will correspond to the given HDC.
*
* This function will acquire stw_framebuffer::mutex. stw_framebuffer_release
* must be called when done
*/
struct stw_framebuffer *
stw_framebuffer_create(
HDC hdc,
int iPixelFormat );
void
stw_framebuffer_reference(
struct stw_framebuffer **ptr,
struct stw_framebuffer *fb);
/**
* Search a framebuffer with a matching HWND.
*
* This function will acquire stw_framebuffer::mutex. stw_framebuffer_release
* must be called when done
*/
struct stw_framebuffer *
stw_framebuffer_from_hwnd(
HWND hwnd );
/**
* Search a framebuffer with a matching HDC.
*
* This function will acquire stw_framebuffer::mutex. stw_framebuffer_release
* must be called when done
*/
struct stw_framebuffer *
stw_framebuffer_from_hdc(
HDC hdc );
BOOL
stw_framebuffer_present_locked(HDC hdc,
struct stw_framebuffer *fb,
struct pipe_resource *res);
void
stw_framebuffer_update(
struct stw_framebuffer *fb);
/**
* Release stw_framebuffer::mutex lock. This framebuffer must not be accessed
* after calling this function, as it may have been deleted by another thread
* in the meanwhile.
*/
void
stw_framebuffer_release(
struct stw_framebuffer *fb);
/**
* Cleanup any existing framebuffers when exiting application.
*/
void
stw_framebuffer_cleanup(void);
#endif /* STW_FRAMEBUFFER_H */
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