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occt/src/OpenGl/OpenGl_Window.cxx

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// Created on: 2011-09-20
// Created by: Sergey ZERCHANINOV
// Copyright (c) 2011-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#include <OpenGl_GlCore12.hxx>
#include <InterfaceGraphic.hxx>
#include <OpenGl_Context.hxx>
#include <OpenGl_GraphicDriver.hxx>
#include <OpenGl_Window.hxx>
#include <OpenGl_Utils.hxx>
#include <Aspect_GraphicDeviceDefinitionError.hxx>
#include <TCollection_AsciiString.hxx>
#include <TCollection_ExtendedString.hxx>
#if defined(HAVE_EGL) || defined(__ANDROID__)
#include <EGL/egl.h>
#endif
IMPLEMENT_STANDARD_HANDLE(OpenGl_Window,MMgt_TShared)
IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Window,MMgt_TShared)
#if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
namespace
{
static const TEL_COLOUR THE_DEFAULT_BG_COLOR = { { 0.F, 0.F, 0.F, 1.F } };
#if defined(HAVE_EGL) || defined(__ANDROID__)
//
#elif defined(_WIN32)
// WGL_ARB_pixel_format
#ifndef WGL_NUMBER_PIXEL_FORMATS_ARB
#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
#define WGL_DRAW_TO_WINDOW_ARB 0x2001
#define WGL_DRAW_TO_BITMAP_ARB 0x2002
#define WGL_ACCELERATION_ARB 0x2003
#define WGL_NEED_PALETTE_ARB 0x2004
#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
#define WGL_SWAP_METHOD_ARB 0x2007
#define WGL_NUMBER_OVERLAYS_ARB 0x2008
#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
#define WGL_TRANSPARENT_ARB 0x200A
#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
#define WGL_SHARE_DEPTH_ARB 0x200C
#define WGL_SHARE_STENCIL_ARB 0x200D
#define WGL_SHARE_ACCUM_ARB 0x200E
#define WGL_SUPPORT_GDI_ARB 0x200F
#define WGL_SUPPORT_OPENGL_ARB 0x2010
#define WGL_DOUBLE_BUFFER_ARB 0x2011
#define WGL_STEREO_ARB 0x2012
#define WGL_PIXEL_TYPE_ARB 0x2013
#define WGL_COLOR_BITS_ARB 0x2014
#define WGL_RED_BITS_ARB 0x2015
#define WGL_RED_SHIFT_ARB 0x2016
#define WGL_GREEN_BITS_ARB 0x2017
#define WGL_GREEN_SHIFT_ARB 0x2018
#define WGL_BLUE_BITS_ARB 0x2019
#define WGL_BLUE_SHIFT_ARB 0x201A
#define WGL_ALPHA_BITS_ARB 0x201B
#define WGL_ALPHA_SHIFT_ARB 0x201C
#define WGL_ACCUM_BITS_ARB 0x201D
#define WGL_ACCUM_RED_BITS_ARB 0x201E
#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
#define WGL_DEPTH_BITS_ARB 0x2022
#define WGL_STENCIL_BITS_ARB 0x2023
#define WGL_AUX_BUFFERS_ARB 0x2024
#define WGL_NO_ACCELERATION_ARB 0x2025
#define WGL_GENERIC_ACCELERATION_ARB 0x2026
#define WGL_FULL_ACCELERATION_ARB 0x2027
#define WGL_SWAP_EXCHANGE_ARB 0x2028
#define WGL_SWAP_COPY_ARB 0x2029
#define WGL_SWAP_UNDEFINED_ARB 0x202A
#define WGL_TYPE_RGBA_ARB 0x202B
#define WGL_TYPE_COLORINDEX_ARB 0x202C
#endif // WGL_NUMBER_PIXEL_FORMATS_ARB
// WGL_ARB_create_context_profile
#ifndef WGL_CONTEXT_MAJOR_VERSION_ARB
#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
#define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093
#define WGL_CONTEXT_FLAGS_ARB 0x2094
#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
// WGL_CONTEXT_FLAGS bits
#define WGL_CONTEXT_DEBUG_BIT_ARB 0x0001
#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
// WGL_CONTEXT_PROFILE_MASK_ARB bits
#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
#define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
#endif // WGL_CONTEXT_MAJOR_VERSION_ARB
static LRESULT CALLBACK wndProcDummy (HWND theWin, UINT theMsg, WPARAM theParamW, LPARAM theParamL)
{
return DefWindowProcW (theWin, theMsg, theParamW, theParamL);
}
#else
static Bool WaitForNotify (Display* theDisp, XEvent* theEv, char* theArg)
{
return (theEv->type == MapNotify) && (theEv->xmap.window == (Window )theArg);
}
#endif
}
// =======================================================================
// function : OpenGl_Window
// purpose :
// =======================================================================
OpenGl_Window::OpenGl_Window (const Handle(OpenGl_GraphicDriver)& theDriver,
const CALL_DEF_WINDOW& theCWindow,
Aspect_RenderingContext theGContext,
const Handle(OpenGl_Caps)& theCaps,
const Handle(OpenGl_Context)& theShareCtx)
: myGlContext (new OpenGl_Context (theCaps)),
myOwnGContext (theGContext == 0),
myWidth (theCWindow.dx),
myHeight (theCWindow.dy),
myBgColor (THE_DEFAULT_BG_COLOR)
{
myBgColor.rgb[0] = theCWindow.Background.r;
myBgColor.rgb[1] = theCWindow.Background.g;
myBgColor.rgb[2] = theCWindow.Background.b;
#if defined(HAVE_EGL) || defined(__ANDROID__)
EGLDisplay anEglDisplay = (EGLDisplay )theDriver->getRawGlDisplay();
EGLContext anEglContext = (EGLContext )theDriver->getRawGlContext();
EGLConfig anEglConfig = (EGLConfig )theDriver->getRawGlConfig();
if (anEglDisplay == EGL_NO_DISPLAY
|| anEglContext == EGL_NO_CONTEXT
|| anEglConfig == NULL)
{
Aspect_GraphicDeviceDefinitionError::Raise ("OpenGl_Window, EGL does not provide compatible configurations!");
return;
}
EGLSurface anEglSurf = EGL_NO_SURFACE;
if (theGContext == (EGLContext )EGL_NO_CONTEXT)
{
// create new surface
anEglSurf = eglCreateWindowSurface (anEglDisplay, anEglConfig, (EGLNativeWindowType )theCWindow.XWindow, NULL);
if (anEglSurf == EGL_NO_SURFACE)
{
Aspect_GraphicDeviceDefinitionError::Raise ("OpenGl_Window, EGL is unable to create surface for window!");
return;
}
}
else if (theGContext != anEglContext)
{
Aspect_GraphicDeviceDefinitionError::Raise ("OpenGl_Window, EGL is used in unsupported combination!");
return;
}
else
{
anEglSurf = eglGetCurrentSurface(EGL_DRAW);
if (anEglSurf == EGL_NO_SURFACE)
{
Aspect_GraphicDeviceDefinitionError::Raise ("OpenGl_Window, EGL is unable to retrieve current surface!");
return;
}
}
myGlContext->Init ((Aspect_Drawable )anEglSurf, (Aspect_Display )anEglDisplay, (Aspect_RenderingContext )anEglContext);
#elif defined(_WIN32)
(void )theDriver;
HWND aWindow = (HWND )theCWindow.XWindow;
HDC aWindowDC = GetDC (aWindow);
HGLRC aGContext = (HGLRC )theGContext;
PIXELFORMATDESCRIPTOR aPixelFrmt;
memset (&aPixelFrmt, 0, sizeof(aPixelFrmt));
aPixelFrmt.nSize = sizeof(PIXELFORMATDESCRIPTOR);
aPixelFrmt.nVersion = 1;
aPixelFrmt.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
aPixelFrmt.iPixelType = PFD_TYPE_RGBA;
aPixelFrmt.cColorBits = 24;
aPixelFrmt.cDepthBits = 24;
aPixelFrmt.cStencilBits = 8;
aPixelFrmt.iLayerType = PFD_MAIN_PLANE;
if (theCaps->contextStereo)
{
aPixelFrmt.dwFlags |= PFD_STEREO;
}
int aPixelFrmtId = ChoosePixelFormat (aWindowDC, &aPixelFrmt);
// in case of failure try without stereo if any
if (aPixelFrmtId == 0 && theCaps->contextStereo)
{
TCollection_ExtendedString aMsg ("OpenGl_Window::CreateWindow: "
"ChoosePixelFormat is unable to find stereo supported pixel format. "
"Choosing similar non stereo format.");
myGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
GL_DEBUG_TYPE_OTHER_ARB,
0, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
aPixelFrmt.dwFlags &= ~PFD_STEREO;
aPixelFrmtId = ChoosePixelFormat (aWindowDC, &aPixelFrmt);
}
if (aPixelFrmtId == 0)
{
ReleaseDC (aWindow, aWindowDC);
TCollection_AsciiString aMsg ("OpenGl_Window::CreateWindow: ChoosePixelFormat failed. Error code: ");
aMsg += (int )GetLastError();
Aspect_GraphicDeviceDefinitionError::Raise (aMsg.ToCString());
return;
}
DescribePixelFormat (aWindowDC, aPixelFrmtId, sizeof(aPixelFrmt), &aPixelFrmt);
HGLRC aSlaveCtx = !theShareCtx.IsNull() ? (HGLRC )theShareCtx->myGContext : NULL;
if (aGContext == NULL)
{
// create temporary context to retrieve advanced context creation procedures
HMODULE aModule = GetModuleHandleW(NULL);
WNDCLASSW aClass; memset (&aClass, 0, sizeof(aClass));
aClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
aClass.lpfnWndProc = wndProcDummy;
aClass.hInstance = aModule;
aClass.lpszClassName = L"OpenGl_WindowTmp";
HWND aWinTmp = NULL;
HDC aDevCtxTmp = NULL;
HGLRC aRendCtxTmp = NULL;
if ((!theCaps->contextDebug && !theCaps->contextNoAccel)
|| RegisterClassW (&aClass) == 0)
{
aClass.lpszClassName = NULL;
}
if (aClass.lpszClassName != NULL)
{
DWORD anExStyle = WS_EX_TOOLWINDOW | WS_EX_WINDOWEDGE;
#if (_WIN32_WINNT >= 0x0500)
anExStyle |= WS_EX_NOACTIVATE;
#endif
aWinTmp = CreateWindowExW(anExStyle,
aClass.lpszClassName, L"OpenGl_WindowTmp",
WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_DISABLED,
2, 2, 4, 4,
NULL, NULL, aModule, NULL);
}
if (aWinTmp != NULL)
{
aDevCtxTmp = GetDC (aWinTmp);
SetPixelFormat (aDevCtxTmp, aPixelFrmtId, &aPixelFrmt);
aRendCtxTmp = wglCreateContext (aDevCtxTmp);
}
typedef BOOL (WINAPI *wglChoosePixelFormatARB_t)(HDC theDevCtx,
const int* theIntAttribs,
const float* theFloatAttribs,
unsigned int theMaxFormats,
int* theFormatsOut,
unsigned int* theNumFormatsOut);
typedef HGLRC (WINAPI *wglCreateContextAttribsARB_t)(HDC theDevCtx,
HGLRC theShareContext,
const int* theAttribs);
wglChoosePixelFormatARB_t aChoosePixProc = NULL;
wglCreateContextAttribsARB_t aCreateCtxProc = NULL;
if (aRendCtxTmp != NULL)
{
wglMakeCurrent (aDevCtxTmp, aRendCtxTmp);
typedef const char* (WINAPI *wglGetExtensionsStringARB_t)(HDC theDeviceContext);
wglGetExtensionsStringARB_t aGetExtensions = (wglGetExtensionsStringARB_t )wglGetProcAddress ("wglGetExtensionsStringARB");
const char* aWglExts = (aGetExtensions != NULL) ? aGetExtensions (wglGetCurrentDC()) : NULL;
if (OpenGl_Context::CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
{
aChoosePixProc = (wglChoosePixelFormatARB_t )wglGetProcAddress ("wglChoosePixelFormatARB");
}
if (OpenGl_Context::CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
{
aCreateCtxProc = (wglCreateContextAttribsARB_t )wglGetProcAddress ("wglCreateContextAttribsARB");
}
}
// choose extended pixel format
if (aChoosePixProc != NULL)
{
const int aPixAttribs[] =
{
WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
WGL_STEREO_ARB, theCaps->contextStereo ? GL_TRUE : GL_FALSE,
WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
//WGL_SAMPLE_BUFFERS_ARB, 1,
//WGL_SAMPLES_ARB, 8,
WGL_COLOR_BITS_ARB, 24,
WGL_DEPTH_BITS_ARB, 24,
WGL_STENCIL_BITS_ARB, 8,
WGL_ACCELERATION_ARB, theCaps->contextNoAccel ? WGL_NO_ACCELERATION_ARB : WGL_FULL_ACCELERATION_ARB,
0, 0,
};
unsigned int aFrmtsNb = 0;
aChoosePixProc (aWindowDC, aPixAttribs, NULL, 1, &aPixelFrmtId, &aFrmtsNb);
}
// setup pixel format - may be set only once per window
if (!SetPixelFormat (aWindowDC, aPixelFrmtId, &aPixelFrmt))
{
ReleaseDC (aWindow, aWindowDC);
TCollection_AsciiString aMsg("OpenGl_Window::CreateWindow: SetPixelFormat failed. Error code: ");
aMsg += (int )GetLastError();
Aspect_GraphicDeviceDefinitionError::Raise (aMsg.ToCString());
return;
}
// create GL context with extra options
if (aCreateCtxProc != NULL)
{
// Beware! NVIDIA drivers reject context creation when WGL_CONTEXT_PROFILE_MASK_ARB are specified
// but not WGL_CONTEXT_MAJOR_VERSION_ARB/WGL_CONTEXT_MINOR_VERSION_ARB.
int aCtxAttribs[] =
{
//WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
//WGL_CONTEXT_MINOR_VERSION_ARB, 2,
//WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, //WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
WGL_CONTEXT_FLAGS_ARB, theCaps->contextDebug ? WGL_CONTEXT_DEBUG_BIT_ARB : 0,
0, 0
};
aGContext = aCreateCtxProc (aWindowDC, aSlaveCtx, aCtxAttribs);
if (aGContext != NULL)
{
aSlaveCtx = NULL;
}
}
if (aRendCtxTmp != NULL)
{
wglDeleteContext (aRendCtxTmp);
}
if (aDevCtxTmp != NULL)
{
ReleaseDC (aWinTmp, aDevCtxTmp);
}
if (aWinTmp != NULL)
{
DestroyWindow (aWinTmp);
}
if (aClass.lpszClassName != NULL)
{
UnregisterClassW (aClass.lpszClassName, aModule);
}
if (aGContext == NULL)
{
// create context using obsolete functionality
aGContext = wglCreateContext (aWindowDC);
}
if (aGContext == NULL)
{
ReleaseDC (aWindow, aWindowDC);
TCollection_AsciiString aMsg ("OpenGl_Window::CreateWindow: wglCreateContext failed. Error code: ");
aMsg += (int )GetLastError();
Aspect_GraphicDeviceDefinitionError::Raise (aMsg.ToCString());
return;
}
}
// all GL context within one OpenGl_GraphicDriver should be shared!
if (aSlaveCtx != NULL && wglShareLists (aSlaveCtx, aGContext) != TRUE)
{
TCollection_AsciiString aMsg ("OpenGl_Window::CreateWindow: wglShareLists failed. Error code: ");
aMsg += (int )GetLastError();
Aspect_GraphicDeviceDefinitionError::Raise (aMsg.ToCString());
return;
}
myGlContext->Init ((Aspect_Handle )aWindow, (Aspect_Handle )aWindowDC, (Aspect_RenderingContext )aGContext);
#else
Window aParent = (Window )theCWindow.XWindow;
Window aWindow = 0;
Display* aDisp = theDriver->GetDisplayConnection()->GetDisplay();
GLXContext aGContext = (GLXContext )theGContext;
XWindowAttributes wattr;
XGetWindowAttributes (aDisp, aParent, &wattr);
const int scr = DefaultScreen (aDisp);
XVisualInfo* aVis = NULL;
{
unsigned long aVisInfoMask = VisualIDMask | VisualScreenMask;
XVisualInfo aVisInfo;
aVisInfo.visualid = wattr.visual->visualid;
aVisInfo.screen = scr;
int aNbItems;
aVis = XGetVisualInfo (aDisp, aVisInfoMask, &aVisInfo, &aNbItems);
}
if (!myOwnGContext)
{
if (aVis != NULL)
{
Aspect_GraphicDeviceDefinitionError::Raise ("OpenGl_Window::CreateWindow: XGetVisualInfo failed.");
return;
}
aWindow = aParent;
}
else
{
#if defined(__linux) || defined(Linux) || defined(__APPLE__)
if (aVis != NULL)
{
// check Visual for OpenGl context's parameters compability
int isGl = 0, isDoubleBuffer = 0, isRGBA = 0, isStereo = 0;
int aDepthSize = 0, aStencilSize = 0;
if (glXGetConfig (aDisp, aVis, GLX_USE_GL, &isGl) != 0)
isGl = 0;
if (glXGetConfig (aDisp, aVis, GLX_RGBA, &isRGBA) != 0)
isRGBA = 0;
if (glXGetConfig (aDisp, aVis, GLX_DOUBLEBUFFER, &isDoubleBuffer) != 0)
isDoubleBuffer = 0;
if (glXGetConfig (aDisp, aVis, GLX_STEREO, &isStereo) != 0)
isStereo = 0;
if (glXGetConfig (aDisp, aVis, GLX_DEPTH_SIZE, &aDepthSize) != 0)
aDepthSize = 0;
if (glXGetConfig (aDisp, aVis, GLX_STENCIL_SIZE, &aStencilSize) != 0)
aStencilSize = 0;
if (!isGl || !aDepthSize || !isRGBA || !aStencilSize ||
(isDoubleBuffer ? 1 : 0) != 1 ||
(isStereo ? 1 : 0) != (theCaps->contextStereo ? 1 : 0))
{
XFree (aVis);
aVis = NULL;
}
}
#endif
if (aVis == NULL)
{
int anIter = 0;
int anAttribs[13];
anAttribs[anIter++] = GLX_RGBA;
anAttribs[anIter++] = GLX_DEPTH_SIZE;
anAttribs[anIter++] = 1;
anAttribs[anIter++] = GLX_STENCIL_SIZE;
anAttribs[anIter++] = 1;
anAttribs[anIter++] = GLX_RED_SIZE;
anAttribs[anIter++] = (wattr.depth <= 8) ? 0 : 1;
anAttribs[anIter++] = GLX_GREEN_SIZE;
anAttribs[anIter++] = (wattr.depth <= 8) ? 0 : 1;
anAttribs[anIter++] = GLX_BLUE_SIZE;
anAttribs[anIter++] = (wattr.depth <= 8) ? 0 : 1;
anAttribs[anIter++] = GLX_DOUBLEBUFFER;
// warning: this flag may be set to None, so it need to be last in anAttribs
Standard_Integer aStereoFlagPos = anIter;
if (theCaps->contextStereo)
anAttribs[anIter++] = GLX_STEREO;
anAttribs[anIter++] = None;
aVis = glXChooseVisual (aDisp, scr, anAttribs);
// in case of failure try without stereo if any
if (aVis == NULL && theCaps->contextStereo)
{
TCollection_ExtendedString aMsg ("OpenGl_Window::CreateWindow: "
"glXChooseVisual is unable to find stereo supported pixel format. "
"Choosing similar non stereo format.");
myGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
GL_DEBUG_TYPE_OTHER_ARB,
0, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
anAttribs[aStereoFlagPos] = None;
aVis = glXChooseVisual (aDisp, scr, anAttribs);
}
if (aVis == NULL)
{
Aspect_GraphicDeviceDefinitionError::Raise ("OpenGl_Window::CreateWindow: glXChooseVisual failed.");
return;
}
}
if (!theShareCtx.IsNull())
{
// ctx est une copie du previous
aGContext = glXCreateContext (aDisp, aVis, (GLXContext )theShareCtx->myGContext, GL_TRUE);
}
else
{
aGContext = glXCreateContext (aDisp, aVis, NULL, GL_TRUE);
}
if (!aGContext)
{
Aspect_GraphicDeviceDefinitionError::Raise ("OpenGl_Window::CreateWindow: glXCreateContext failed.");
return;
}
Colormap cmap = XCreateColormap (aDisp, aParent, aVis->visual, AllocNone);
XColor color;
color.red = (unsigned short) (myBgColor.rgb[0] * 0xFFFF);
color.green = (unsigned short) (myBgColor.rgb[1] * 0xFFFF);
color.blue = (unsigned short) (myBgColor.rgb[2] * 0xFFFF);
color.flags = DoRed | DoGreen | DoBlue;
XAllocColor (aDisp, cmap, &color);
XSetWindowAttributes cwa;
cwa.colormap = cmap;
cwa.event_mask = StructureNotifyMask;
cwa.border_pixel = color.pixel;
cwa.background_pixel = color.pixel;
if (aVis->visualid == wattr.visual->visualid)
{
aWindow = aParent;
}
else
{
unsigned long mask = CWBackPixel | CWColormap | CWBorderPixel | CWEventMask;
aWindow = XCreateWindow (aDisp, aParent, 0, 0, myWidth, myHeight, 0/*bw*/, aVis->depth, InputOutput, aVis->visual, mask, &cwa);
}
XSetWindowBackground (aDisp, aWindow, cwa.background_pixel);
XClearWindow (aDisp, aWindow);
if (aWindow != aParent)
{
XEvent anEvent;
XMapWindow (aDisp, aWindow);
XIfEvent (aDisp, &anEvent, WaitForNotify, (char* )aWindow);
}
}
myGlContext->Init ((Aspect_Drawable )aWindow, (Aspect_Display )aDisp, (Aspect_RenderingContext )aGContext);
#endif
myGlContext->Share (theShareCtx);
Init();
}
// =======================================================================
// function : ~OpenGl_Window
// purpose :
// =======================================================================
OpenGl_Window::~OpenGl_Window()
{
if (!myOwnGContext
|| myGlContext.IsNull())
{
myGlContext.Nullify();
return;
}
// release "GL" context if it is owned by window
// Mesa implementation can fail to destroy GL context if it set for current thread.
// It should be safer to unset thread GL context before its destruction.
#if defined(HAVE_EGL) || defined(__ANDROID__)
if ((EGLSurface )myGlContext->myWindow != EGL_NO_SURFACE)
{
eglDestroySurface ((EGLDisplay )myGlContext->myDisplay,
(EGLSurface )myGlContext->myWindow);
}
#elif defined(_WIN32)
HWND aWindow = (HWND )myGlContext->myWindow;
HDC aWindowDC = (HDC )myGlContext->myWindowDC;
HGLRC aWindowGContext = (HGLRC )myGlContext->myGContext;
HGLRC aThreadGContext = wglGetCurrentContext();
myGlContext.Nullify();
if (aThreadGContext != NULL)
{
if (aThreadGContext == aWindowGContext)
{
wglMakeCurrent (NULL, NULL);
}
wglDeleteContext (aWindowGContext);
}
ReleaseDC (aWindow, aWindowDC);
#else
Display* aDisplay = (Display* )myGlContext->myDisplay;
GLXContext aWindowGContext = (GLXContext )myGlContext->myGContext;
GLXContext aThreadGContext = glXGetCurrentContext();
myGlContext.Nullify();
if (aDisplay != NULL)
{
if (aThreadGContext == aWindowGContext)
{
glXMakeCurrent (aDisplay, None, NULL);
}
// FSXXX sync necessary if non-direct rendering
glXWaitGL();
glXDestroyContext (aDisplay, aWindowGContext);
}
#endif
}
#endif // !__APPLE__
// =======================================================================
// function : Activate
// purpose :
// =======================================================================
Standard_Boolean OpenGl_Window::Activate()
{
return myGlContext->MakeCurrent();
}
#if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
// =======================================================================
// function : Resize
// purpose : call_subr_resize
// =======================================================================
void OpenGl_Window::Resize (const CALL_DEF_WINDOW& theCWindow)
{
#if !defined(_WIN32) && !defined(HAVE_EGL) && !defined(__ANDROID__)
Display* aDisp = (Display* )myGlContext->myDisplay;
if (aDisp == NULL)
return;
#endif
// If the size is not changed - do nothing
if ((myWidth == theCWindow.dx) && (myHeight == theCWindow.dy))
return;
myWidth = theCWindow.dx;
myHeight = theCWindow.dy;
#if !defined(_WIN32) && !defined(HAVE_EGL) && !defined(__ANDROID__)
XResizeWindow (aDisp, myGlContext->myWindow, (unsigned int )myWidth, (unsigned int )myHeight);
XSync (aDisp, False);
#endif
Init();
}
#endif // !__APPLE__
// =======================================================================
// function : ReadDepths
// purpose : TelReadDepths
// =======================================================================
void OpenGl_Window::ReadDepths (const Standard_Integer theX, const Standard_Integer theY,
const Standard_Integer theWidth, const Standard_Integer theHeight,
float* theDepths)
{
if (theDepths == NULL || !Activate())
return;
OpenGl_Mat4 aProjectMat;
OpenGl_Utils::Ortho2D<Standard_ShortReal> (aProjectMat,
0.f, static_cast<GLfloat> (myWidth), 0.f, static_cast<GLfloat> (myHeight));
myGlContext->WorldViewState.Push();
myGlContext->ProjectionState.Push();
myGlContext->WorldViewState.SetIdentity();
myGlContext->ProjectionState.SetCurrent (aProjectMat);
myGlContext->ApplyProjectionMatrix();
myGlContext->ApplyWorldViewMatrix();
#if !defined(GL_ES_VERSION_2_0)
glRasterPos2i (theX, theY);
DisableFeatures();
glReadPixels (theX, theY, theWidth, theHeight, GL_DEPTH_COMPONENT, GL_FLOAT, theDepths);
EnableFeatures();
#endif
myGlContext->WorldViewState.Pop();
myGlContext->ProjectionState.Pop();
myGlContext->ApplyProjectionMatrix();
}
// =======================================================================
// function : SetBackgroundColor
// purpose : call_subr_set_background
// =======================================================================
void OpenGl_Window::SetBackgroundColor (const Standard_ShortReal theR,
const Standard_ShortReal theG,
const Standard_ShortReal theB)
{
myBgColor.rgb[0] = theR;
myBgColor.rgb[1] = theG;
myBgColor.rgb[2] = theB;
}
#if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
// =======================================================================
// function : Init
// purpose :
// =======================================================================
void OpenGl_Window::Init()
{
if (!Activate())
return;
#if defined(HAVE_EGL) || defined(__ANDROID__)
eglQuerySurface ((EGLDisplay )myGlContext->myDisplay, (EGLSurface )myGlContext->myWindow, EGL_WIDTH, &myWidth);
eglQuerySurface ((EGLDisplay )myGlContext->myDisplay, (EGLSurface )myGlContext->myWindow, EGL_HEIGHT, &myHeight);
#elif defined(_WIN32)
RECT cr;
GetClientRect ((HWND )myGlContext->myWindow, &cr);
myWidth = cr.right - cr.left;
myHeight = cr.bottom - cr.top;
#else
Window aRootWin;
int aDummy;
unsigned int aDummyU;
unsigned int aNewWidth = 0;
unsigned int aNewHeight = 0;
Display* aDisp = (Display* )myGlContext->myDisplay;
XGetGeometry (aDisp, myGlContext->myWindow, &aRootWin, &aDummy, &aDummy, &aNewWidth, &aNewHeight, &aDummyU, &aDummyU);
myWidth = aNewWidth;
myHeight = aNewHeight;
#endif
glDisable (GL_SCISSOR_TEST);
glViewport (0, 0, myWidth, myHeight);
#if !defined(GL_ES_VERSION_2_0)
glMatrixMode (GL_MODELVIEW);
glDrawBuffer (GL_BACK);
#endif
}
#endif // !__APPLE__
// =======================================================================
// function : EnableFeatures
// purpose :
// =======================================================================
void OpenGl_Window::EnableFeatures() const
{
//
}
// =======================================================================
// function : DisableFeatures
// purpose :
// =======================================================================
void OpenGl_Window::DisableFeatures() const
{
#if !defined(GL_ES_VERSION_2_0)
glPixelTransferi (GL_MAP_COLOR, GL_FALSE);
#endif
/*
* Disable stuff that's likely to slow down glDrawPixels.
* (Omit as much of this as possible, when you know in advance
* that the OpenGL state will already be set correctly.)
*/
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glDisable(GL_TEXTURE_2D);
glDisable(GL_STENCIL_TEST);
#if !defined(GL_ES_VERSION_2_0)
glDisable(GL_LIGHTING);
glDisable(GL_ALPHA_TEST);
glDisable(GL_FOG);
glDisable(GL_LOGIC_OP);
glDisable(GL_TEXTURE_1D);
glPixelTransferi(GL_MAP_COLOR, GL_FALSE);
glPixelTransferi(GL_RED_SCALE, 1);
glPixelTransferi(GL_RED_BIAS, 0);
glPixelTransferi(GL_GREEN_SCALE, 1);
glPixelTransferi(GL_GREEN_BIAS, 0);
glPixelTransferi(GL_BLUE_SCALE, 1);
glPixelTransferi(GL_BLUE_BIAS, 0);
glPixelTransferi(GL_ALPHA_SCALE, 1);
glPixelTransferi(GL_ALPHA_BIAS, 0);
/*
* Disable extensions that could slow down glDrawPixels.
* (Actually, you should check for the presence of the proper
* extension before making these calls. I've omitted that
* code for simplicity.)
*/
if ((myGlContext->myGlVerMajor >= 1) && (myGlContext->myGlVerMinor >= 2))
{
#ifdef GL_EXT_convolution
if (myGlContext->CheckExtension ("GL_CONVOLUTION_1D_EXT"))
glDisable(GL_CONVOLUTION_1D_EXT);
if (myGlContext->CheckExtension ("GL_CONVOLUTION_2D_EXT"))
glDisable(GL_CONVOLUTION_2D_EXT);
if (myGlContext->CheckExtension ("GL_SEPARABLE_2D_EXT"))
glDisable(GL_SEPARABLE_2D_EXT);
#endif
#ifdef GL_EXT_histogram
if (myGlContext->CheckExtension ("GL_SEPARABLE_2D_EXT"))
glDisable(GL_HISTOGRAM_EXT);
if (myGlContext->CheckExtension ("GL_MINMAX_EXT"))
glDisable(GL_MINMAX_EXT);
#endif
#ifdef GL_EXT_texture3D
if (myGlContext->CheckExtension ("GL_TEXTURE_3D_EXT"))
glDisable(GL_TEXTURE_3D_EXT);
#endif
}
#endif
}
// =======================================================================
// function : MakeFrontBufCurrent
// purpose : TelMakeFrontBufCurrent
// =======================================================================
void OpenGl_Window::MakeFrontBufCurrent() const
{
#if !defined(GL_ES_VERSION_2_0)
glDrawBuffer (GL_FRONT);
#endif
}
// =======================================================================
// function : MakeBackBufCurrent
// purpose : TelMakeBackBufCurrent
// =======================================================================
void OpenGl_Window::MakeBackBufCurrent() const
{
#if !defined(GL_ES_VERSION_2_0)
glDrawBuffer (GL_BACK);
#endif
}
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