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libreoffice/vcl/source/opengl/OpenGLContext.cxx
Noel Grandin 827c46e7d7 fdo#82577: Handle Window 
Put the VCL Window class in the vcl namespace. Avoids clash with the X11
Window typedef.

Change-Id: Ib1beb7ab4ad75562a42aeb252732a073d25eff1a
2014-09-23 14:11:39 +03:00

964 lines
26 KiB
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <vcl/opengl/OpenGLContext.hxx>
#include <vcl/opengl/OpenGLHelper.hxx>
#include <vcl/syschild.hxx>
#include <vcl/sysdata.hxx>
#include <boost/scoped_array.hpp>
#include <vcl/pngwrite.hxx>
#include <vcl/bmpacc.hxx>
#include <vcl/graph.hxx>
#if defined(MACOSX)
#include <premac.h>
#include "OpenGLWrapper.hxx"
#include <postmac.h>
#endif
using namespace com::sun::star;
GLWindow::~GLWindow()
{
#if defined( UNX ) && !defined MACOSX && !defined IOS && !defined ANDROID
XFree(vi);
#endif
}
OpenGLContext::OpenGLContext():
mpWindow(NULL),
m_pChildWindow(NULL),
mbInitialized(false),
mbRequestLegacyContext(false)
{
}
OpenGLContext::~OpenGLContext()
{
#if defined( WNT )
if (m_aGLWin.hRC)
{
wglMakeCurrent( m_aGLWin.hDC, 0 );
wglDeleteContext( m_aGLWin.hRC );
ReleaseDC( m_aGLWin.hWnd, m_aGLWin.hDC );
}
#elif defined( MACOSX )
OpenGLWrapper::resetCurrent();
#elif defined( IOS ) || defined( ANDROID )
// nothing
#elif defined( UNX )
if(m_aGLWin.ctx)
{
glXMakeCurrent(m_aGLWin.dpy, None, NULL);
if( glGetError() != GL_NO_ERROR )
{
SAL_WARN("vcl.opengl", "glError: " << (char *)gluErrorString(glGetError()));
}
glXDestroyContext(m_aGLWin.dpy, m_aGLWin.ctx);
}
#endif
}
void OpenGLContext::requestLegacyContext()
{
mbRequestLegacyContext = true;
}
#if defined( _WIN32 )
static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_CREATE:
return 0;
case WM_CLOSE:
PostQuitMessage(0);
return 0;
case WM_DESTROY:
return 0;
case WM_KEYDOWN:
switch(wParam)
{
case VK_ESCAPE:
PostQuitMessage(0);
return 0;
case VK_SPACE:
break;
}
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
}
int InitTempWindow(HWND *hwnd, int width, int height, PIXELFORMATDESCRIPTOR inPfd, GLWindow glWin)
{
PIXELFORMATDESCRIPTOR pfd = inPfd;
int pfmt;
int ret;
WNDCLASS wc;
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = wc.cbWndExtra = 0;
wc.hInstance = NULL;
wc.hIcon = NULL;
wc.hCursor = NULL;
wc.hbrBackground = NULL;
wc.lpszMenuName = NULL;
wc.lpszClassName = (LPCSTR)"GLRenderer";
RegisterClass(&wc);
*hwnd = CreateWindow(wc.lpszClassName, NULL, WS_DISABLED, 0, 0, width, height, NULL, NULL, wc.hInstance, NULL);
glWin.hDC = GetDC(*hwnd);
pfmt = ChoosePixelFormat(glWin.hDC, &pfd);
if (!pfmt)
{
return -1;
}
ret = SetPixelFormat(glWin.hDC, pfmt, &pfd);
if(!ret)
{
return -1;
}
glWin.hRC = wglCreateContext(glWin.hDC);
if(!(glWin.hRC))
{
return -1;
}
ret = wglMakeCurrent(glWin.hDC, glWin.hRC);
if(!ret)
{
return -1;
}
return 0;
}
bool WGLisExtensionSupported(const char *extension)
{
const size_t extlen = strlen(extension);
const char *supported = NULL;
// Try To Use wglGetExtensionStringARB On Current DC, If Possible
PROC wglGetExtString = wglGetProcAddress("wglGetExtensionsStringARB");
if (wglGetExtString)
supported = ((char*(__stdcall*)(HDC))wglGetExtString)(wglGetCurrentDC());
// If That Failed, Try Standard Opengl Extensions String
if (supported == NULL)
supported = (char*)glGetString(GL_EXTENSIONS);
// If That Failed Too, Must Be No Extensions Supported
if (supported == NULL)
return 0;
// Begin Examination At Start Of String, Increment By 1 On False Match
for (const char* p = supported; ; p++)
{
// Advance p Up To The Next Possible Match
p = strstr(p, extension);
if (p == NULL)
return 0; // No Match
// Make Sure That Match Is At The Start Of The String Or That
// The Previous Char Is A Space, Or Else We Could Accidentally
// Match "wglFunkywglExtension" With "wglExtension"
// Also, Make Sure That The Following Character Is Space Or NULL
// Or Else "wglExtensionTwo" Might Match "wglExtension"
if ((p==supported || p[-1]==' ') && (p[extlen]=='\0' || p[extlen]==' '))
return 1; // Match
}
}
bool InitMultisample(PIXELFORMATDESCRIPTOR pfd, int& rPixelFormat)
{
HWND hWnd = NULL;
GLWindow glWin;
//create a temp windwo to check whether support multi-sample, if support, get the format
if (InitTempWindow(&hWnd, 1, 1, pfd, glWin) < 0)
{
SAL_WARN("vcl.opengl", "Can't create temp window to test");
return false;
}
// See If The String Exists In WGL!
if (!WGLisExtensionSupported("WGL_ARB_multisample"))
{
SAL_WARN("vcl.opengl", "Device doesn't support multi sample");
return false;
}
// Get Our Pixel Format
PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
if (!wglChoosePixelFormatARB)
{
return false;
}
// Get Our Current Device Context
HDC hDC = GetDC(hWnd);
int pixelFormat;
int valid;
UINT numFormats;
float fAttributes[] = {0,0};
// These Attributes Are The Bits We Want To Test For In Our Sample
// Everything Is Pretty Standard, The Only One We Want To
// Really Focus On Is The SAMPLE BUFFERS ARB And WGL SAMPLES
// These Two Are Going To Do The Main Testing For Whether Or Not
// We Support Multisampling On This Hardware.
int iAttributes[] =
{
WGL_DRAW_TO_WINDOW_ARB,GL_TRUE,
WGL_SUPPORT_OPENGL_ARB,GL_TRUE,
WGL_ACCELERATION_ARB,WGL_FULL_ACCELERATION_ARB,
WGL_COLOR_BITS_ARB,24,
WGL_ALPHA_BITS_ARB,8,
WGL_DEPTH_BITS_ARB,24,
WGL_STENCIL_BITS_ARB,0,
WGL_DOUBLE_BUFFER_ARB,GL_TRUE,
WGL_SAMPLE_BUFFERS_ARB,GL_TRUE,
WGL_SAMPLES_ARB,8,
0,0
};
bool bArbMultisampleSupported = true;
// First We Check To See If We Can Get A Pixel Format For 4 Samples
valid = wglChoosePixelFormatARB(hDC, iAttributes, fAttributes, 1, &pixelFormat, &numFormats);
// If We Returned True, And Our Format Count Is Greater Than 1
if (valid && numFormats >= 1)
{
bArbMultisampleSupported = true;
rPixelFormat = pixelFormat;
wglMakeCurrent(NULL, NULL);
wglDeleteContext(glWin.hRC);
ReleaseDC(hWnd, glWin.hDC);
DestroyWindow(hWnd);
return bArbMultisampleSupported;
}
// Our Pixel Format With 4 Samples Failed, Test For 2 Samples
iAttributes[19] = 2;
valid = wglChoosePixelFormatARB(hDC, iAttributes, fAttributes, 1, &pixelFormat, &numFormats);
if (valid && numFormats >= 1)
{
bArbMultisampleSupported = true;
rPixelFormat = pixelFormat;
wglMakeCurrent(NULL, NULL);
wglDeleteContext(glWin.hRC);
ReleaseDC(hWnd, glWin.hDC);
DestroyWindow(hWnd);
return bArbMultisampleSupported;
}
// Return The Valid Format
wglMakeCurrent(NULL, NULL);
wglDeleteContext(glWin.hRC);
ReleaseDC(hWnd, glWin.hDC);
DestroyWindow(hWnd);
return bArbMultisampleSupported;
}
#endif
#ifdef DBG_UTIL
namespace {
const char* getSeverityString(GLenum severity)
{
switch(severity)
{
case GL_DEBUG_SEVERITY_LOW:
return "low";
case GL_DEBUG_SEVERITY_MEDIUM:
return "medium";
case GL_DEBUG_SEVERITY_HIGH:
return "high";
default:
;
}
return "unknown";
}
const char* getSourceString(GLenum source)
{
switch(source)
{
case GL_DEBUG_SOURCE_API:
return "API";
case GL_DEBUG_SOURCE_SHADER_COMPILER:
return "shader compiler";
case GL_DEBUG_SOURCE_WINDOW_SYSTEM:
return "window system";
case GL_DEBUG_SOURCE_THIRD_PARTY:
return "third party";
case GL_DEBUG_SOURCE_APPLICATION:
return "Libreoffice";
case GL_DEBUG_SOURCE_OTHER:
return "unknown";
default:
;
}
return "unknown";
}
const char* getTypeString(GLenum type)
{
switch(type)
{
case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR:
return "deprecated behavior";
case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
return "undefined behavior";
case GL_DEBUG_TYPE_PERFORMANCE:
return "performance";
case GL_DEBUG_TYPE_PORTABILITY:
return "portability";
case GL_DEBUG_TYPE_MARKER:
return "marker";
case GL_DEBUG_TYPE_PUSH_GROUP:
return "push group";
case GL_DEBUG_TYPE_POP_GROUP:
return "pop group";
case GL_DEBUG_TYPE_OTHER:
return "other";
case GL_DEBUG_TYPE_ERROR:
return "error";
default:
;
}
return "unkown";
}
extern "C" void
#if defined _WIN32
APIENTRY
#endif
debug_callback(GLenum source, GLenum type, GLuint id,
GLenum severity, GLsizei , const GLchar* message, GLvoid* )
{
// ignore Nvidia's : "Program/shader state performance warning: Fragment Shader is going to be recompiled because the shader key based on GL state mismatches."
// the GLSL compiler is a bit too aggressive in optimizing the state based on the current OpenGL state
if (id == 131218)
return;
SAL_WARN("vcl.opengl", "OpenGL debug message: source: " << getSourceString(source) << ", type: "
<< getTypeString(type) << ", id: " << id << ", severity: " << getSeverityString(severity) << " with message: " << message);
}
}
#endif
#if defined UNX && !defined MACOSX && !defined IOS && !defined ANDROID
namespace {
static bool errorTriggered;
int oglErrorHandler( Display* /*dpy*/, XErrorEvent* /*evnt*/ )
{
errorTriggered = true;
return 0;
}
GLXFBConfig* getFBConfig(const SystemEnvData* sysData, int& nBestFBC)
{
Display *dpy = reinterpret_cast<Display*>(sysData->pDisplay);
if( dpy == 0 || !glXQueryExtension( dpy, NULL, NULL ) )
return NULL;
Window win = sysData->aWindow;
SAL_INFO("vcl.opengl", "parent window: " << win);
XWindowAttributes xattr;
XGetWindowAttributes( dpy, win, &xattr );
int screen = XScreenNumberOfScreen( xattr.screen );
static int visual_attribs[] =
{
GLX_DOUBLEBUFFER, True,
GLX_X_RENDERABLE, True,
GLX_RED_SIZE, 8,
GLX_GREEN_SIZE, 8,
GLX_BLUE_SIZE, 8,
GLX_ALPHA_SIZE, 8,
GLX_DEPTH_SIZE, 24,
GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR,
None
};
int fbCount = 0;
GLXFBConfig* pFBC = glXChooseFBConfig( dpy,
screen,
visual_attribs, &fbCount );
if(!pFBC)
{
SAL_WARN("vcl.opengl", "no suitable fb format found");
return NULL;
}
int best_num_samp = -1;
for(int i = 0; i < fbCount; ++i)
{
XVisualInfo* pVi = glXGetVisualFromFBConfig( dpy, pFBC[i] );
if(pVi)
{
// pick the one with the most samples per pixel
int nSampleBuf = 0;
int nSamples = 0;
glXGetFBConfigAttrib( dpy, pFBC[i], GLX_SAMPLE_BUFFERS, &nSampleBuf );
glXGetFBConfigAttrib( dpy, pFBC[i], GLX_SAMPLES , &nSamples );
if ( nBestFBC < 0 || (nSampleBuf && ( nSamples > best_num_samp )) )
{
nBestFBC = i;
best_num_samp = nSamples;
}
}
XFree( pVi );
}
return pFBC;
}
}
#endif
bool OpenGLContext::init( vcl::Window* pParent )
{
if(mbInitialized)
return true;
m_pWindow.reset(pParent ? NULL : new vcl::Window(0, WB_NOBORDER|WB_NODIALOGCONTROL));
mpWindow = pParent ? pParent : m_pWindow.get();
m_pChildWindow = 0;
initWindow();
return ImplInit();
}
bool OpenGLContext::init(SystemChildWindow* pChildWindow)
{
if(mbInitialized)
return true;
if( !pChildWindow )
return false;
mpWindow = pChildWindow->GetParent();
m_pChildWindow = pChildWindow;
initWindow();
return ImplInit();
}
bool OpenGLContext::ImplInit()
{
SAL_INFO("vcl.opengl", "OpenGLContext::ImplInit----start");
if(m_pWindow)
m_pWindow->setPosSizePixel(0,0,0,0);
m_aGLWin.Width = 0;
m_aGLWin.Height = 0;
#if defined( WNT )
m_aGLWin.hDC = GetDC(m_aGLWin.hWnd);
#elif defined( MACOSX )
#elif defined( IOS )
SAL_INFO("vcl.opengl", "OpenGLContext not implemented yet for iOS");
return false;
#elif defined( ANDROID )
SAL_INFO("vcl.opengl", "OpenGLContext not implemented yet for Android");
return false;
#elif defined( UNX )
#ifdef DBG_UTIL
if (glXCreateContextAttribsARB && !mbRequestLegacyContext)
{
int best_fbc = -1;
const SystemEnvData* sysData(m_pChildWindow->GetSystemData());
GLXFBConfig* pFBC = getFBConfig(sysData, best_fbc);
if (!pFBC)
return false;
int nContextAttribs[] =
{
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
GLX_CONTEXT_MINOR_VERSION_ARB, 2,
None
};
m_aGLWin.ctx = glXCreateContextAttribsARB(m_aGLWin.dpy, pFBC[best_fbc], 0, GL_TRUE, nContextAttribs);
}
#endif
if (!m_aGLWin.ctx)
{
if (!m_aGLWin.dpy || !m_aGLWin.vi)
return false;
m_aGLWin.ctx = m_aGLWin.dpy == 0 ? 0 : glXCreateContext(m_aGLWin.dpy,
m_aGLWin.vi,
0,
GL_TRUE);
}
if( m_aGLWin.ctx == NULL )
{
SAL_WARN("vcl.opengl", "unable to create GLX context");
return false;
}
#endif
#if defined( WNT )
PIXELFORMATDESCRIPTOR PixelFormatFront = // PixelFormat Tells Windows How We Want Things To Be
{
sizeof(PIXELFORMATDESCRIPTOR),
1, // Version Number
PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL |
PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA, // Request An RGBA Format
(BYTE)32, // Select Our Color Depth
0, 0, 0, 0, 0, 0, // Color Bits Ignored
0, // No Alpha Buffer
0, // Shift Bit Ignored
0, // No Accumulation Buffer
0, 0, 0, 0, // Accumulation Bits Ignored
64, // 32 bit Z-BUFFER
0, // 0 bit stencil buffer
0, // No Auxiliary Buffer
0, // now ignored
0, // Reserved
0, 0, 0 // Layer Masks Ignored
};
// we must check whether can set the MSAA
int WindowPix = 0;
bool bMultiSampleSupport = InitMultisample(PixelFormatFront, WindowPix);
if (bMultiSampleSupport && WindowPix != 0)
{
m_aGLWin.bMultiSampleSupported = true;
}
else
{
WindowPix = ChoosePixelFormat(m_aGLWin.hDC, &PixelFormatFront);
}
if (WindowPix == 0)
{
SAL_WARN("vcl.opengl", "Invalid pixelformat");
return false;
}
SetPixelFormat(m_aGLWin.hDC, WindowPix, &PixelFormatFront);
m_aGLWin.hRC = wglCreateContext(m_aGLWin.hDC);
if (m_aGLWin.hRC == NULL)
{
SAL_WARN("vcl.opengl", "wglCreateContext failed");
return false;
}
if (!wglMakeCurrent(m_aGLWin.hDC, m_aGLWin.hRC))
{
SAL_WARN("vcl.opengl", "wglMakeCurrent failed: " << GetLastError());
return false;
}
#elif defined( MACOSX )
NSOpenGLView* pView = getOpenGLView();
OpenGLWrapper::makeCurrent(pView);
#elif defined( IOS )
#elif defined( ANDROID )
#elif defined( UNX )
if( !glXMakeCurrent( m_aGLWin.dpy, m_aGLWin.win, m_aGLWin.ctx ) )
{
SAL_INFO("vcl.opengl", "unable to select current GLX context");
return false;
}
int glxMinor, glxMajor;
double nGLXVersion = 0;
if( glXQueryVersion( m_aGLWin.dpy, &glxMajor, &glxMinor ) )
nGLXVersion = glxMajor + 0.1*glxMinor;
SAL_INFO("vcl.opengl", "available GLX version: " << nGLXVersion);
m_aGLWin.GLExtensions = glGetString( GL_EXTENSIONS );
SAL_INFO("vcl.opengl", "available GL extensions: " << m_aGLWin.GLExtensions);
if( m_aGLWin.HasGLXExtension("GLX_SGI_swap_control" ) )
{
// enable vsync
typedef GLint (*glXSwapIntervalProc)(GLint);
glXSwapIntervalProc glXSwapInterval = (glXSwapIntervalProc) glXGetProcAddress( (const GLubyte*) "glXSwapIntervalSGI" );
if( glXSwapInterval ) {
int (*oldHandler)(Display* /*dpy*/, XErrorEvent* /*evnt*/);
// replace error handler temporarily
oldHandler = XSetErrorHandler( oglErrorHandler );
errorTriggered = false;
glXSwapInterval( 1 );
// sync so that we possibly get an XError
glXWaitGL();
XSync(m_aGLWin.dpy, false);
if( errorTriggered )
SAL_WARN("vcl.opengl", "error when trying to set swap interval, NVIDIA or Mesa bug?");
else
SAL_INFO("vcl.opengl", "set swap interval to 1 (enable vsync)");
// restore the error handler
XSetErrorHandler( oldHandler );
}
}
#endif
//rGLRender.InitOpenGL(m_aGLWin);
static bool bGlewInit = false;
if(!bGlewInit)
{
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (err != GLEW_OK)
{
SAL_WARN("vcl.opengl", "Failed to initialize GLEW: " << glewGetErrorString(err));
return false;
}
else
bGlewInit = true;
}
#ifdef DBG_UTIL
// only enable debug output in dbgutil build
// somehow there are implementations where the feature is present and the function
// pointer is still NULL
if( GLEW_ARB_debug_output && glDebugMessageCallback )
{
glEnable(GL_DEBUG_OUTPUT);
glDebugMessageCallback(&debug_callback, NULL);
}
#endif
SAL_INFO("vcl.opengl", "OpenGLContext::ImplInit----end");
mbInitialized = true;
return true;
}
void OpenGLContext::setWinPosAndSize(const Point &rPos, const Size& rSize)
{
if(m_pWindow)
m_pWindow->SetPosSizePixel(rPos, rSize);
if( m_pChildWindow )
m_pChildWindow->SetPosSizePixel(rPos, rSize);
m_aGLWin.Width = rSize.Width();
m_aGLWin.Height = rSize.Height();
}
void OpenGLContext::setWinSize(const Size& rSize)
{
if(m_pWindow)
m_pWindow->SetSizePixel(rSize);
if( m_pChildWindow )
m_pChildWindow->SetSizePixel(rSize);
m_aGLWin.Width = rSize.Width();
m_aGLWin.Height = rSize.Height();
}
void OpenGLContext::renderToFile()
{
int iWidth = m_aGLWin.Width;
int iHeight = m_aGLWin.Height;
static int nIdx = 0;
OUString aName = OUString( "file:///home/moggi/Documents/work/output" ) + OUString::number( nIdx++ ) + ".png";
OpenGLHelper::renderToFile(iWidth, iHeight, aName);
}
#if defined( WNT )
bool OpenGLContext::initWindow()
{
if( !m_pChildWindow )
{
SystemWindowData winData = generateWinData(mpWindow, false);
m_pChildWindow = new SystemChildWindow(mpWindow, 0, &winData, false);
m_pChildWindowGC.reset(m_pChildWindow);
}
if( m_pChildWindow )
{
m_pChildWindow->SetMouseTransparent( true );
m_pChildWindow->SetParentClipMode(PARENTCLIPMODE_CLIP);
m_pChildWindow->EnableEraseBackground( false );
m_pChildWindow->SetControlForeground();
m_pChildWindow->SetControlBackground();
//m_pChildWindow->EnablePaint(false);
const SystemEnvData* sysData(m_pChildWindow->GetSystemData());
m_aGLWin.hWnd = sysData->hWnd;
}
return true;
}
#elif defined( MACOSX )
bool OpenGLContext::initWindow()
{
if( !m_pChildWindow )
{
SystemWindowData winData = generateWinData(mpWindow, mbRequestLegacyContext);
m_pChildWindow = new SystemChildWindow(mpWindow, 0, &winData, false);
m_pChildWindowGC.reset(m_pChildWindow);
}
if( m_pChildWindow )
{
m_pChildWindow->SetMouseTransparent( true );
m_pChildWindow->SetParentClipMode(PARENTCLIPMODE_CLIP);
m_pChildWindow->EnableEraseBackground( false );
m_pChildWindow->SetControlForeground();
m_pChildWindow->SetControlBackground();
//m_pChildWindow->EnablePaint(false);
}
return true;
}
#elif defined( IOS ) || defined( ANDROID )
bool OpenGLContext::initWindow()
{
return false;
}
#elif defined( UNX )
bool OpenGLContext::initWindow()
{
const SystemEnvData* pChildSysData = 0;
SystemWindowData winData = generateWinData(mpWindow, false);
if( winData.pVisual )
{
if( !m_pChildWindow )
{
m_pChildWindow = new SystemChildWindow(mpWindow, 0, &winData, false);
m_pChildWindowGC.reset(m_pChildWindow);
}
pChildSysData = m_pChildWindow->GetSystemData();
}
if (!m_pChildWindow || !pChildSysData)
return false;
m_pChildWindow->SetMouseTransparent( true );
m_pChildWindow->SetParentClipMode( PARENTCLIPMODE_NOCLIP );
m_pChildWindow->EnableEraseBackground( false );
m_pChildWindow->SetControlForeground();
m_pChildWindow->SetControlBackground();
m_aGLWin.dpy = reinterpret_cast<Display*>(pChildSysData->pDisplay);
m_aGLWin.win = pChildSysData->aWindow;
m_aGLWin.screen = pChildSysData->nScreen;
// Get visual info
{
Visual* pVisual = (Visual*)pChildSysData->pVisual;
XVisualInfo aTemplate;
aTemplate.visualid = XVisualIDFromVisual( pVisual );
int nVisuals = 0;
XVisualInfo* pInfos = XGetVisualInfo( m_aGLWin.dpy, VisualIDMask, &aTemplate, &nVisuals );
if( nVisuals != 1 )
SAL_WARN( "vcl.opengl", "match count for visual id is not 1" );
m_aGLWin.vi = pInfos;
}
// Check multi sample support
int nSamples = 0;
glXGetConfig(m_aGLWin.dpy, m_aGLWin.vi, GLX_SAMPLES, &nSamples);
if( nSamples > 0 )
m_aGLWin.bMultiSampleSupported = true;
m_aGLWin.GLXExtensions = glXQueryExtensionsString( m_aGLWin.dpy, m_aGLWin.screen );
SAL_INFO("vcl.opengl", "available GLX extensions: " << m_aGLWin.GLXExtensions);
return true;
}
#endif
#if defined( WNT ) || defined( MACOSX ) || defined( IOS ) || defined( ANDROID )
SystemWindowData OpenGLContext::generateWinData(vcl::Window* /*pParent*/, bool bRequestLegacyContext)
{
(void) bRequestLegacyContext;
SystemWindowData aWinData;
#if defined(MACOSX)
aWinData.bOpenGL = true;
aWinData.bLegacy = bRequestLegacyContext;
#endif
aWinData.nSize = sizeof(aWinData);
return aWinData;
}
#elif defined( UNX )
namespace {
// we need them before glew can initialize them
// glew needs an OpenGL context so we need to get the address manually
void initOpenGLFunctionPointers()
{
glXChooseFBConfig = (GLXFBConfig*(*)(Display *dpy, int screen, const int *attrib_list, int *nelements))glXGetProcAddressARB((GLubyte*)"glXChooseFBConfig");
glXGetVisualFromFBConfig = (XVisualInfo*(*)(Display *dpy, GLXFBConfig config))glXGetProcAddressARB((GLubyte*)"glXGetVisualFromFBConfig"); // try to find a visual for the current set of attributes
glXGetFBConfigAttrib = (int(*)(Display *dpy, GLXFBConfig config, int attribute, int* value))glXGetProcAddressARB((GLubyte*)"glXGetFBConfigAttrib");
glXCreateContextAttribsARB = (GLXContext(*) (Display*, GLXFBConfig, GLXContext, Bool, const int*)) glXGetProcAddressARB((const GLubyte *) "glXCreateContextAttribsARB");;
}
}
SystemWindowData OpenGLContext::generateWinData(vcl::Window* pParent, bool)
{
SystemWindowData aWinData;
aWinData.nSize = sizeof(aWinData);
aWinData.pVisual = NULL;
const SystemEnvData* sysData(pParent->GetSystemData());
Display *dpy = reinterpret_cast<Display*>(sysData->pDisplay);
if( dpy == 0 || !glXQueryExtension( dpy, NULL, NULL ) )
return aWinData;
initOpenGLFunctionPointers();
int best_fbc = -1;
GLXFBConfig* pFBC = getFBConfig(sysData, best_fbc);
XVisualInfo* vi = glXGetVisualFromFBConfig( dpy, pFBC[best_fbc] );
if( vi )
{
SAL_INFO("vcl.opengl", "using VisualID " << vi->visualid);
aWinData.pVisual = (void*)(vi->visual);
}
XFree(pFBC);
return aWinData;
}
#endif
void OpenGLContext::makeCurrent()
{
#if defined( WNT )
if (!wglMakeCurrent(m_aGLWin.hDC, m_aGLWin.hRC))
{
SAL_WARN("vcl.opengl", "OpenGLContext::makeCurrent(): wglMakeCurrent failed: " << GetLastError());
}
#elif defined( MACOSX )
NSOpenGLView* pView = getOpenGLView();
OpenGLWrapper::makeCurrent(pView);
#elif defined( IOS ) || defined( ANDROID )
// nothing
#elif defined( UNX )
glXMakeCurrent( m_aGLWin.dpy, m_aGLWin.win, m_aGLWin.ctx );
#endif
}
void OpenGLContext::resetCurrent()
{
#if defined( WNT )
wglMakeCurrent( m_aGLWin.hDC, 0 );
#elif defined( MACOSX )
OpenGLWrapper::resetCurrent();
#elif defined( IOS ) || defined( ANDROID )
// nothing
#elif defined( UNX )
glXMakeCurrent(m_aGLWin.dpy, None, NULL);
#endif
}
void OpenGLContext::swapBuffers()
{
#if defined( WNT )
SwapBuffers(m_aGLWin.hDC);
#elif defined( MACOSX )
NSOpenGLView* pView = getOpenGLView();
OpenGLWrapper::swapBuffers(pView);
#elif defined( IOS ) || defined( ANDROID )
// nothing
#elif defined( UNX )
glXSwapBuffers(m_aGLWin.dpy, m_aGLWin.win);
#endif
}
void OpenGLContext::sync()
{
#if defined( WNT )
// nothing
#elif defined( MACOSX ) || defined( IOS ) || defined( ANDROID )
// nothing
#elif defined( UNX )
glXWaitGL();
XSync(m_aGLWin.dpy, false);
#endif
}
void OpenGLContext::show()
{
if (m_pChildWindow)
m_pChildWindow->Show();
else if (m_pWindow)
m_pWindow->Show();
}
SystemChildWindow* OpenGLContext::getChildWindow()
{
return m_pChildWindow;
}
const SystemChildWindow* OpenGLContext::getChildWindow() const
{
return m_pChildWindow;
}
bool OpenGLContext::supportMultiSampling() const
{
return m_aGLWin.bMultiSampleSupported;
}
#if defined(MACOSX)
NSOpenGLView* OpenGLContext::getOpenGLView()
{
return reinterpret_cast<NSOpenGLView*>(m_pChildWindow->GetSystemData()->mpNSView);
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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