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