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/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* 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 VMWARE 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 <GL/gl.h>
#include <GL/wglext.h>
#include "util/u_debug.h"
#include "stw_st.h"
struct pipe_resource;
struct st_framebuffer_iface;
struct stw_pixelformat_info;
/**
* Windows 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.
*
* Note: if both this mutex and the stw_device::fb_mutex need to be locked,
* the stw_device::fb_mutex needs to be locked first.
*/
CRITICAL_SECTION mutex;
/*
* Immutable members.
*
* Note that even access to immutable members implies acquiring the mutex
* above, to prevent the framebuffer from being destroyed.
*/
HWND hWnd;
int iPixelFormat;
const struct stw_pixelformat_info *pfi;
/* A pixel format that can be used by GDI */
int iDisplayablePixelFormat;
boolean bPbuffer;
struct st_framebuffer_iface *stfb;
/*
* Mutable members.
*/
unsigned refcnt;
/* FIXME: Make this work for multiple contexts bound to the same framebuffer */
boolean must_resize;
boolean minimized; /**< Is the window currently minimized? */
unsigned width;
unsigned height;
/** WGL_ARB_render_texture - set at Pbuffer creation time */
unsigned textureFormat; /**< WGL_NO_TEXTURE or WGL_TEXTURE_RGB[A]_ARB */
unsigned textureTarget; /**< WGL_NO_TEXTURE or WGL_TEXTURE_1D/2D/
CUBE_MAP_ARB */
boolean textureMipmap; /**< TRUE/FALSE */
/** WGL_ARB_render_texture - set with wglSetPbufferAttribARB() */
unsigned textureLevel;
unsigned textureFace; /**< [0..6] */
/**
* 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 acquire 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_unlock
* must be called when done
*/
struct stw_framebuffer *
stw_framebuffer_create(HDC hdc, int iPixelFormat);
/**
* Increase fb reference count. The referenced framebuffer should be locked.
*
* It's not necessary to hold stw_dev::fb_mutex global lock.
*/
static inline void
stw_framebuffer_reference_locked(struct stw_framebuffer *fb)
{
if (fb) {
assert(stw_own_mutex(&fb->mutex));
fb->refcnt++;
}
}
void
stw_framebuffer_release_locked(struct stw_framebuffer *fb);
/**
* Search a framebuffer with a matching HWND.
*
* This function will acquire stw_framebuffer::mutex. stw_framebuffer_unlock
* 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_unlock
* 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);
static inline void
stw_framebuffer_lock(struct stw_framebuffer *fb)
{
assert(fb);
EnterCriticalSection(&fb->mutex);
}
/**
* 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.
*/
static inline void
stw_framebuffer_unlock(struct stw_framebuffer *fb)
{
assert(fb);
assert(stw_own_mutex(&fb->mutex));
LeaveCriticalSection(&fb->mutex);
}
/**
* Cleanup any existing framebuffers when exiting application.
*/
void
stw_framebuffer_cleanup(void);
static inline struct stw_st_framebuffer *
stw_st_framebuffer(struct st_framebuffer_iface *stfb)
{
return (struct stw_st_framebuffer *) stfb;
}
static inline struct stw_framebuffer *
stw_framebuffer_from_HPBUFFERARB(HPBUFFERARB hPbuffer)
{
return (struct stw_framebuffer *) hPbuffer;
}
#endif /* STW_FRAMEBUFFER_H */
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