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402 lines
13 KiB
C++
402 lines
13 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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#define GL_GLEXT_LEGACY 1
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#define GLX_GLXEXT_LEGACY 1
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#include <GL/gl.h>
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#include <GL/glx.h>
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#include <GL/glext.h>
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#include <GL/glxext.h>
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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 ¶ms, const SExposedVideoData &videodata, int screennr) :
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Params(params), PrimaryContext(videodata), VisualInfo(0), glxFBConfig(0), GlxWin(0)
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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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#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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PFNGLXCHOOSEFBCONFIGPROC glxChooseFBConfig = (PFNGLXCHOOSEFBCONFIGPROC)glXGetProcAddress(reinterpret_cast<const GLubyte *>("glXChooseFBConfig"));
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if (major == 1 && minor > 2 && glxChooseFBConfig) {
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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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GLX_RENDER_TYPE,
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GLX_RGBA_BIT,
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GLX_RED_SIZE,
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4,
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GLX_GREEN_SIZE,
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4,
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GLX_BLUE_SIZE,
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4,
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GLX_ALPHA_SIZE,
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Params.WithAlphaChannel ? 1 : 0,
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GLX_DEPTH_SIZE,
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Params.ZBufferBits, // 10,11
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GLX_DOUBLEBUFFER,
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Params.Doublebuffer ? True : False,
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GLX_STENCIL_SIZE,
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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,
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1,
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GLX_SAMPLES,
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Params.AntiAlias, // 18,19
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#elif defined(GLX_ARB_multisample)
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GLX_SAMPLE_BUFFERS_ARB,
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1,
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GLX_SAMPLES_ARB,
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Params.AntiAlias, // 18,19
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#elif defined(GLX_SGIS_multisample)
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GLX_SAMPLE_BUFFERS_SGIS,
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1,
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GLX_SAMPLES_SGIS,
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Params.AntiAlias, // 18,19
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#endif
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GLX_STEREO,
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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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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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while (!configList && (visualAttrBuffer[19] > 1)) {
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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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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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os::Printer::log("No FSAA available.", ELL_WARNING);
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Params.AntiAlias = 0;
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} else {
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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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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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while (!configList && (visualAttrBuffer[19] > 1)) {
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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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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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os::Printer::log("No FSAA available.", ELL_WARNING);
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Params.AntiAlias = 0;
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} else {
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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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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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while (!configList && (visualAttrBuffer[19] > 1)) {
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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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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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os::Printer::log("No FSAA available.", ELL_WARNING);
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Params.AntiAlias = 0;
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} else {
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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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glxFBConfig = configList[0];
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XFree(configList);
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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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}
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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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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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None,
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};
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VisualInfo = glXChooseVisual(display, screennr, visualAttrBuffer);
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if (!VisualInfo) {
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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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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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} 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 ¶ms, 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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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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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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GlxWin = glXCreateWindow((Display *)CurrentContext.OpenGLLinux.X11Display, (GLXFBConfig)glxFBConfig, CurrentContext.OpenGLLinux.X11Window, NULL);
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if (!GlxWin) {
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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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} else {
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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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#if defined(GLX_ARB_create_context)
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static int IrrIgnoreError(Display *display, XErrorEvent *event)
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{
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char msg[256];
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XGetErrorText(display, event->error_code, msg, 256);
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os::Printer::log("Ignoring an X error", msg, ELL_DEBUG);
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return 0;
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}
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#endif
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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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if (GlxWin) {
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#if defined(GLX_ARB_create_context)
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PFNGLXCREATECONTEXTATTRIBSARBPROC glxCreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress(reinterpret_cast<const GLubyte *>("glXCreateContextAttribsARB"));
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if (glxCreateContextAttribsARB) {
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os::Printer::log("GLX with GLX_ARB_create_context", ELL_DEBUG);
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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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XErrorHandler old = XSetErrorHandler(IrrIgnoreError);
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context = glxCreateContextAttribsARB((Display *)CurrentContext.OpenGLLinux.X11Display, (GLXFBConfig)glxFBConfig, NULL, True, contextAttrBuffer);
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XSetErrorHandler(old);
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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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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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} else {
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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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} else {
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context = glXCreateContext((Display *)CurrentContext.OpenGLLinux.X11Display, VisualInfo, NULL, True);
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if (!context) {
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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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if (videoData.OpenGLLinux.X11Display && videoData.OpenGLLinux.X11Context) {
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if (!glXMakeCurrent((Display *)videoData.OpenGLLinux.X11Display, videoData.OpenGLLinux.GLXWindow, (GLXContext)videoData.OpenGLLinux.X11Context)) {
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os::Printer::log("Context activation failed.");
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return false;
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} else {
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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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} else {
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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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os::Printer::log("Context activation failed.");
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return false;
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} else {
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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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} else if (!restorePrimaryOnZero && !videoData.OpenGLLinux.X11Window && !videoData.OpenGLLinux.X11Display) {
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if (!glXMakeCurrent((Display *)PrimaryContext.OpenGLLinux.X11Display, None, NULL)) {
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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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if (!glXMakeCurrent((Display *)PrimaryContext.OpenGLLinux.X11Display, PrimaryContext.OpenGLLinux.X11Window, (GLXContext)PrimaryContext.OpenGLLinux.X11Context)) {
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os::Printer::log("Context activation failed.");
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return false;
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} else {
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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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if (GlxWin) {
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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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} else {
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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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return (void *)glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(procName.c_str()));
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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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