irrlicht/source/Irrlicht/CGLXManager.cpp

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// Copyright (C) 2013 Christian Stehno
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in Irrlicht.h
#include "CGLXManager.h"
#ifdef _IRR_COMPILE_WITH_GLX_MANAGER_
#include "os.h"
#define GL_GLEXT_LEGACY 1
#define GLX_GLXEXT_LEGACY 1
#include <GL/gl.h>
#include <GL/glx.h>
#include <GL/glext.h>
#include <GL/glxext.h>
namespace irr
{
namespace video
{
CGLXManager::CGLXManager(const SIrrlichtCreationParameters& params, const SExposedVideoData& videodata, int screennr)
: Params(params), PrimaryContext(videodata), VisualInfo(0), glxFBConfig(0), GlxWin(0)
{
#ifdef _DEBUG
setDebugName("CGLXManager");
#endif
CurrentContext.OpenGLLinux.X11Display=PrimaryContext.OpenGLLinux.X11Display;
int major, minor;
Display* display = (Display*)PrimaryContext.OpenGLLinux.X11Display;
const bool isAvailableGLX=glXQueryExtension(display,&major,&minor);
if (isAvailableGLX && glXQueryVersion(display, &major, &minor))
{
#if defined(GLX_VERSION_1_3)
typedef GLXFBConfig * ( * PFNGLXCHOOSEFBCONFIGPROC) (Display *dpy, int screen, const int *attrib_list, int *nelements);
PFNGLXCHOOSEFBCONFIGPROC glxChooseFBConfig = (PFNGLXCHOOSEFBCONFIGPROC)glXGetProcAddress(reinterpret_cast<const GLubyte*>("glXChooseFBConfig"));
if (major==1 && minor>2 && glxChooseFBConfig)
{
os::Printer::log("GLX >= 1.3", ELL_DEBUG);
// attribute array for the draw buffer
int visualAttrBuffer[] =
{
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_RED_SIZE, 4,
GLX_GREEN_SIZE, 4,
GLX_BLUE_SIZE, 4,
GLX_ALPHA_SIZE, Params.WithAlphaChannel?1:0,
GLX_DEPTH_SIZE, Params.ZBufferBits, //10,11
GLX_DOUBLEBUFFER, Params.Doublebuffer?True:False,
GLX_STENCIL_SIZE, Params.Stencilbuffer?1:0,
#if defined(GLX_VERSION_1_4) && defined(GLX_SAMPLE_BUFFERS) // we need to check the extension string!
GLX_SAMPLE_BUFFERS, 1,
GLX_SAMPLES, Params.AntiAlias, // 18,19
#elif defined(GLX_ARB_multisample)
GLX_SAMPLE_BUFFERS_ARB, 1,
GLX_SAMPLES_ARB, Params.AntiAlias, // 18,19
#elif defined(GLX_SGIS_multisample)
GLX_SAMPLE_BUFFERS_SGIS, 1,
GLX_SAMPLES_SGIS, Params.AntiAlias, // 18,19
#endif
//#ifdef GL_ARB_framebuffer_sRGB
// GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB, Params.HandleSRGB,
//#elif defined(GL_EXT_framebuffer_sRGB)
// GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT, Params.HandleSRGB,
//#endif
GLX_STEREO, Params.Stereobuffer?True:False,
None
};
GLXFBConfig *configList=0;
int nitems=0;
if (Params.AntiAlias<2)
{
visualAttrBuffer[17] = 0;
visualAttrBuffer[19] = 0;
}
// first round with unchanged values
{
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
if (!configList && Params.AntiAlias)
{
while (!configList && (visualAttrBuffer[19]>1))
{
visualAttrBuffer[19] -= 1;
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
}
if (!configList)
{
visualAttrBuffer[17] = 0;
visualAttrBuffer[19] = 0;
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
if (configList)
{
os::Printer::log("No FSAA available.", ELL_WARNING);
Params.AntiAlias=0;
}
else
{
//reenable multisampling
visualAttrBuffer[17] = 1;
visualAttrBuffer[19] = Params.AntiAlias;
}
}
}
}
// Next try with flipped stencil buffer value
// If the first round was with stencil flag it's now without
// Other way round also makes sense because some configs
// only have depth buffer combined with stencil buffer
if (!configList)
{
if (Params.Stencilbuffer)
os::Printer::log("No stencilbuffer available, disabling stencil shadows.", ELL_WARNING);
Params.Stencilbuffer = !Params.Stencilbuffer;
visualAttrBuffer[15]=Params.Stencilbuffer?1:0;
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
if (!configList && Params.AntiAlias)
{
while (!configList && (visualAttrBuffer[19]>1))
{
visualAttrBuffer[19] -= 1;
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
}
if (!configList)
{
visualAttrBuffer[17] = 0;
visualAttrBuffer[19] = 0;
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
if (configList)
{
os::Printer::log("No FSAA available.", ELL_WARNING);
Params.AntiAlias=0;
}
else
{
//reenable multisampling
visualAttrBuffer[17] = 1;
visualAttrBuffer[19] = Params.AntiAlias;
}
}
}
}
// Next try without double buffer
if (!configList && Params.Doublebuffer)
{
os::Printer::log("No doublebuffering available.", ELL_WARNING);
Params.Doublebuffer=false;
visualAttrBuffer[13] = GLX_DONT_CARE;
Params.Stencilbuffer = false;
visualAttrBuffer[15]=0;
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
if (!configList && Params.AntiAlias)
{
while (!configList && (visualAttrBuffer[19]>1))
{
visualAttrBuffer[19] -= 1;
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
}
if (!configList)
{
visualAttrBuffer[17] = 0;
visualAttrBuffer[19] = 0;
configList=glxChooseFBConfig(display, screennr, visualAttrBuffer,&nitems);
if (configList)
{
os::Printer::log("No FSAA available.", ELL_WARNING);
Params.AntiAlias=0;
}
else
{
//reenable multisampling
visualAttrBuffer[17] = 1;
visualAttrBuffer[19] = Params.AntiAlias;
}
}
}
}
if (configList)
{
glxFBConfig=configList[0];
XFree(configList);
typedef XVisualInfo * ( * PFNGLXGETVISUALFROMFBCONFIGPROC) (Display *dpy, GLXFBConfig config);
PFNGLXGETVISUALFROMFBCONFIGPROC glxGetVisualFromFBConfig= (PFNGLXGETVISUALFROMFBCONFIGPROC)glXGetProcAddress(reinterpret_cast<const GLubyte*>("glXGetVisualFromFBConfig"));
if (glxGetVisualFromFBConfig)
VisualInfo = glxGetVisualFromFBConfig(display,(GLXFBConfig)glxFBConfig);
}
}
else
#endif
{
// attribute array for the draw buffer
int visualAttrBuffer[] =
{
GLX_RGBA, GLX_USE_GL,
GLX_RED_SIZE, 4,
GLX_GREEN_SIZE, 4,
GLX_BLUE_SIZE, 4,
GLX_ALPHA_SIZE, Params.WithAlphaChannel?1:0,
GLX_DEPTH_SIZE, Params.ZBufferBits,
GLX_STENCIL_SIZE, Params.Stencilbuffer?1:0, // 12,13
// The following attributes have no flags, but are
// either present or not. As a no-op we use
// GLX_USE_GL, which is silently ignored by glXChooseVisual
Params.Doublebuffer?GLX_DOUBLEBUFFER:GLX_USE_GL, // 14
Params.Stereobuffer?GLX_STEREO:GLX_USE_GL, // 15
//#ifdef GL_ARB_framebuffer_sRGB
// Params.HandleSRGB?GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB:GLX_USE_GL,
//#elif defined(GL_EXT_framebuffer_sRGB)
// Params.HandleSRGB?GLX_FRAMEBUFFER_SRGB_CAPABLE_EXT:GLX_USE_GL,
//#endif
None
};
VisualInfo=glXChooseVisual(display, screennr, visualAttrBuffer);
if (!VisualInfo)
{
if (Params.Stencilbuffer)
os::Printer::log("No stencilbuffer available, disabling.", ELL_WARNING);
Params.Stencilbuffer = !Params.Stencilbuffer;
visualAttrBuffer[13]=Params.Stencilbuffer?1:0;
VisualInfo=glXChooseVisual(display, screennr, visualAttrBuffer);
if (!VisualInfo && Params.Doublebuffer)
{
os::Printer::log("No doublebuffering available.", ELL_WARNING);
Params.Doublebuffer=false;
visualAttrBuffer[14] = GLX_USE_GL;
VisualInfo=glXChooseVisual(display, screennr, visualAttrBuffer);
}
}
}
}
else
os::Printer::log("No GLX support available. OpenGL driver will not work.", ELL_WARNING);
}
CGLXManager::~CGLXManager()
{
}
bool CGLXManager::initialize(const SIrrlichtCreationParameters& params, const SExposedVideoData& videodata)
{
// store params
Params=params;
// set display
CurrentContext.OpenGLLinux.X11Display=videodata.OpenGLLinux.X11Display;
// now get new window
CurrentContext.OpenGLLinux.X11Window=videodata.OpenGLLinux.X11Window;
if (!PrimaryContext.OpenGLLinux.X11Window)
{
PrimaryContext.OpenGLLinux.X11Window=CurrentContext.OpenGLLinux.X11Window;
}
return true;
}
void CGLXManager::terminate()
{
memset((void*)&CurrentContext, 0, sizeof(CurrentContext));
}
bool CGLXManager::generateSurface()
{
if (glxFBConfig)
{
GlxWin=glXCreateWindow((Display*)CurrentContext.OpenGLLinux.X11Display,(GLXFBConfig)glxFBConfig,CurrentContext.OpenGLLinux.X11Window,NULL);
if (!GlxWin)
{
os::Printer::log("Could not create GLX window.", ELL_WARNING);
return false;
}
CurrentContext.OpenGLLinux.GLXWindow=GlxWin;
}
else
{
CurrentContext.OpenGLLinux.GLXWindow=CurrentContext.OpenGLLinux.X11Window;
}
return true;
}
void CGLXManager::destroySurface()
{
if (GlxWin)
glXDestroyWindow((Display*)CurrentContext.OpenGLLinux.X11Display, GlxWin);
}
#if defined(GLX_ARB_create_context)
static int IrrIgnoreError(Display *display, XErrorEvent *event)
{
char msg[256];
XGetErrorText(display, event->error_code, msg, 256);
os::Printer::log("Ignoring an X error", msg, ELL_DEBUG);
return 0;
}
#endif
bool CGLXManager::generateContext()
{
GLXContext context = 0;
if (glxFBConfig)
{
if (GlxWin)
{
#if defined(GLX_ARB_create_context)
PFNGLXCREATECONTEXTATTRIBSARBPROC glxCreateContextAttribsARB=(PFNGLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress(reinterpret_cast<const GLubyte*>("glXCreateContextAttribsARB"));
if (glxCreateContextAttribsARB)
{
os::Printer::log("GLX with GLX_ARB_create_context", ELL_DEBUG);
int contextAttrBuffer[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
// GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
None
};
XErrorHandler old = XSetErrorHandler(IrrIgnoreError);
context = glxCreateContextAttribsARB((Display*)CurrentContext.OpenGLLinux.X11Display, (GLXFBConfig)glxFBConfig, NULL, True, contextAttrBuffer);
XSetErrorHandler(old);
// transparently fall back to legacy call
}
if (!context)
#endif
{
// create glx context
context = glXCreateNewContext((Display*)CurrentContext.OpenGLLinux.X11Display, (GLXFBConfig)glxFBConfig, GLX_RGBA_TYPE, NULL, True);
if (!context)
{
os::Printer::log("Could not create GLX rendering context.", ELL_WARNING);
return false;
}
}
}
else
{
os::Printer::log("GLX window was not properly created.", ELL_WARNING);
return false;
}
}
else
{
context = glXCreateContext((Display*)CurrentContext.OpenGLLinux.X11Display, VisualInfo, NULL, True);
if (!context)
{
os::Printer::log("Could not create GLX rendering context.", ELL_WARNING);
return false;
}
}
CurrentContext.OpenGLLinux.X11Context=context;
return true;
}
const SExposedVideoData& CGLXManager::getContext() const
{
return CurrentContext;
}
bool CGLXManager::activateContext(const SExposedVideoData& videoData, bool restorePrimaryOnZero)
{
//TODO: handle restorePrimaryOnZero
if (videoData.OpenGLLinux.X11Window)
{
if (videoData.OpenGLLinux.X11Display && videoData.OpenGLLinux.X11Context)
{
if (!glXMakeCurrent((Display*)videoData.OpenGLLinux.X11Display, videoData.OpenGLLinux.GLXWindow, (GLXContext)videoData.OpenGLLinux.X11Context))
{
os::Printer::log("Context activation failed.");
return false;
}
else
{
CurrentContext.OpenGLLinux.GLXWindow = videoData.OpenGLLinux.GLXWindow;
CurrentContext.OpenGLLinux.X11Window = videoData.OpenGLLinux.X11Window;
CurrentContext.OpenGLLinux.X11Display = videoData.OpenGLLinux.X11Display;
}
}
else
{
// in case we only got a window ID, try with the existing values for display and context
if (!glXMakeCurrent((Display*)PrimaryContext.OpenGLLinux.X11Display, videoData.OpenGLLinux.GLXWindow, (GLXContext)PrimaryContext.OpenGLLinux.X11Context))
{
os::Printer::log("Context activation failed.");
return false;
}
else
{
CurrentContext.OpenGLLinux.GLXWindow = videoData.OpenGLLinux.GLXWindow;
CurrentContext.OpenGLLinux.X11Window = videoData.OpenGLLinux.X11Window;
CurrentContext.OpenGLLinux.X11Display = PrimaryContext.OpenGLLinux.X11Display;
}
}
}
else if (!restorePrimaryOnZero && !videoData.OpenGLLinux.X11Window && !videoData.OpenGLLinux.X11Display)
{
if (!glXMakeCurrent((Display*)PrimaryContext.OpenGLLinux.X11Display, None, NULL))
{
os::Printer::log("Render Context reset failed.");
return false;
}
CurrentContext.OpenGLLinux.X11Window = 0;
CurrentContext.OpenGLLinux.X11Display = 0;
}
// set back to main context
else if (CurrentContext.OpenGLLinux.X11Display != PrimaryContext.OpenGLLinux.X11Display)
{
if (!glXMakeCurrent((Display*)PrimaryContext.OpenGLLinux.X11Display, PrimaryContext.OpenGLLinux.X11Window, (GLXContext)PrimaryContext.OpenGLLinux.X11Context))
{
os::Printer::log("Context activation failed.");
return false;
}
else
{
CurrentContext = PrimaryContext;
}
}
return true;
}
void CGLXManager::destroyContext()
{
if (CurrentContext.OpenGLLinux.X11Context)
{
if (GlxWin)
{
if (!glXMakeContextCurrent((Display*)CurrentContext.OpenGLLinux.X11Display, None, None, NULL))
os::Printer::log("Could not release glx context.", ELL_WARNING);
}
else
{
if (!glXMakeCurrent((Display*)CurrentContext.OpenGLLinux.X11Display, None, NULL))
os::Printer::log("Could not release glx context.", ELL_WARNING);
}
glXDestroyContext((Display*)CurrentContext.OpenGLLinux.X11Display, (GLXContext)CurrentContext.OpenGLLinux.X11Context);
}
}
void* CGLXManager::getProcAddress(const std::string &procName)
{
return (void*)glXGetProcAddressARB(reinterpret_cast<const GLubyte*>(procName.c_str()));
}
bool CGLXManager::swapBuffers()
{
glXSwapBuffers((Display*)CurrentContext.OpenGLLinux.X11Display, CurrentContext.OpenGLLinux.GLXWindow);
return true;
}
}
}
#endif