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/********************************************************************************
* *
* O p e n G L C a n v a s O b j e c t *
* *
*********************************************************************************
* Copyright (C) 1997,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* 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 3 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 License *
* along with this program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#include "xincs.h"
#include "fxver.h"
#include "fxdefs.h"
#include "fxmath.h"
#include "FXArray.h"
#include "FXHash.h"
#include "FXMutex.h"
#include "FXStream.h"
#include "FXString.h"
#include "FXSize.h"
#include "FXPoint.h"
#include "FXRectangle.h"
#include "FXStringDictionary.h"
#include "FXSettings.h"
#include "FXRegistry.h"
#include "FXAccelTable.h"
#include "FXCursor.h"
#include "FXEvent.h"
#include "FXWindow.h"
#include "FXApp.h"
#include "FXException.h"
#include "FXVisual.h"
#include "FXGLVisual.h"
#include "FXGLCanvas.h"
#include "FXGLContext.h"
/*
Notes:
- Since this only adds SetPixelFormat, perhaps not a bad idea to contemplate
moving this call to SetPixelFormat somewhere else [candidates are FXGLVisual,
FXWindow, or FXGLContext].
*/
using namespace FX;
/*******************************************************************************/
namespace FX {
// Object implementation
FXIMPLEMENT(FXGLCanvas,FXCanvas,nullptr,0)
// For serialization
FXGLCanvas::FXGLCanvas(){
flags|=FLAG_ENABLED|FLAG_SHOWN;
context=nullptr;
}
// Construct a GL canvas with its private context and private display lists
FXGLCanvas::FXGLCanvas(FXComposite* p,FXGLVisual *vis,FXObject* tgt,FXSelector sel,FXuint opts,FXint x,FXint y,FXint w,FXint h):FXCanvas(p,tgt,sel,opts|GLCANVAS_OWN_CONTEXT,x,y,w,h){
flags|=FLAG_ENABLED|FLAG_SHOWN;
context=new FXGLContext(getApp(),vis);
visual=vis;
}
// Construct a GL canvas with its private context but shared display lists
FXGLCanvas::FXGLCanvas(FXComposite* p,FXGLVisual *vis,FXGLCanvas* share,FXObject* tgt,FXSelector sel,FXuint opts,FXint x,FXint y,FXint w,FXint h):FXCanvas(p,tgt,sel,opts|GLCANVAS_OWN_CONTEXT,x,y,w,h){
flags|=FLAG_ENABLED|FLAG_SHOWN;
context=new FXGLContext(getApp(),vis,share ? share->getContext() : nullptr);
visual=vis;
}
// Construct a GL canvas with a shared context
FXGLCanvas::FXGLCanvas(FXComposite* p,FXGLContext* ctx,FXObject* tgt,FXSelector sel,FXuint opts,FXint x,FXint y,FXint w,FXint h):FXCanvas(p,tgt,sel,opts,x,y,w,h){
flags|=FLAG_ENABLED|FLAG_SHOWN;
context=ctx;
visual=ctx->getVisual();
}
#ifdef WIN32
const void* FXGLCanvas::GetClass() const { return TEXT("FXGLCanvas"); }
#endif
// Change context
void FXGLCanvas::setContext(FXGLContext *ctx,FXbool owned){
if(!ctx){ fxerror("%s::setContext: NULL context\n",getClassName()); }
if(xid){ fxerror("%s::setContext: context should be set before calling create()\n",getClassName()); }
if(context!=ctx){
if(options&GLCANVAS_OWN_CONTEXT) delete context;
context=ctx;
visual=ctx->getVisual();
}
options^=((0-owned)^options)&GLCANVAS_OWN_CONTEXT;
}
// Return true if it is sharing display lists
FXbool FXGLCanvas::isShared() const {
return (context->getShared()!=nullptr);
}
// Create X window (GL CANVAS)
void FXGLCanvas::create(){
FXCanvas::create();
if(xid){
if(getApp()->isInitialized()){
// Create context
context->create();
// Change frame buffer according to visual
#ifdef HAVE_GL_H
#if defined(WIN32)
PIXELFORMATDESCRIPTOR pfd={sizeof(PIXELFORMATDESCRIPTOR),1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
HDC hdc=::GetDC((HWND)xid); // FIXME should this be this->GetDC()
SetPixelFormat(hdc,(FXint)(FXival)visual->id(),&pfd);
::ReleaseDC((HWND)xid,hdc); // FIXME should this be this->ReleaseDC()
//#elif defined(GLX_VERSION_1_3)
// xid=glXCreateWindow((Display*)getApp()->getDisplay(),(GLXFBConfig)visual->id(),xid,nullptr);
#endif
#endif
}
}
}
// Detach the GL Canvas
void FXGLCanvas::detach(){
context->detach();
FXCanvas::detach();
}
// Destroy the GL Canvas
void FXGLCanvas::destroy(){
if(xid){
if(getApp()->isInitialized()){
if(options&GLCANVAS_OWN_CONTEXT) context->destroy();
#ifdef HAVE_GL_H
//#if defined(GLX_VERSION_1_3)
// glXDestroyWindow((Display*)getApp()->getDisplay(),xid);
// xid=0;
//#endif
#endif
}
}
FXCanvas::destroy();
}
// Make the rendering context of GL Canvas current
FXbool FXGLCanvas::makeCurrent(){
return context->begin(this);
}
// Make the rendering context of GL Canvas current
FXbool FXGLCanvas::makeNonCurrent(){
return context->end();
}
// Return true if this window's context is current
FXbool FXGLCanvas::isCurrent() const {
return context->isCurrent();
}
// Used by GL to swap the buffers in double buffer mode, or flush a single buffer
void FXGLCanvas::swapBuffers(){
context->swapBuffers();
}
// Save object to stream
void FXGLCanvas::save(FXStream& store) const {
FXCanvas::save(store);
store << context;
}
// Load object from stream
void FXGLCanvas::load(FXStream& store){
FXCanvas::load(store);
store >> context;
}
// Close and release any resources
FXGLCanvas::~FXGLCanvas(){
destroy();
if(options&GLCANVAS_OWN_CONTEXT) delete context;
context=(FXGLContext*)-1L;
}
}
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