/*************************************************************************/ /* context_gl_x11.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #include "context_gl_x11.h" #ifdef X11_ENABLED #if defined(OPENGL_ENABLED) #include <stdio.h> #include <stdlib.h> #include <unistd.h> #define GLX_GLXEXT_PROTOTYPES #include <GL/glx.h> #include <GL/glxext.h> #define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091 #define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092 typedef GLXContext (*GLXCREATECONTEXTATTRIBSARBPROC)(Display *, GLXFBConfig, GLXContext, Bool, const int *); struct ContextGL_X11_Private { ::GLXContext glx_context; }; void ContextGL_X11::release_current() { glXMakeCurrent(x11_display, None, NULL); } void ContextGL_X11::make_current() { glXMakeCurrent(x11_display, x11_window, p->glx_context); } void ContextGL_X11::swap_buffers() { glXSwapBuffers(x11_display, x11_window); } static bool ctxErrorOccurred = false; static int ctxErrorHandler(Display *dpy, XErrorEvent *ev) { ctxErrorOccurred = true; return 0; } static void set_class_hint(Display *p_display, Window p_window) { XClassHint *classHint; /* set the name and class hints for the window manager to use */ classHint = XAllocClassHint(); if (classHint) { classHint->res_name = (char *)"Godot_Engine"; classHint->res_class = (char *)"Godot"; } XSetClassHint(p_display, p_window, classHint); XFree(classHint); } Error ContextGL_X11::initialize() { //const char *extensions = glXQueryExtensionsString(x11_display, DefaultScreen(x11_display)); GLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = (GLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress((const GLubyte *)"glXCreateContextAttribsARB"); ERR_FAIL_COND_V(!glXCreateContextAttribsARB, ERR_UNCONFIGURED); static int visual_attribs[] = { GLX_RENDER_TYPE, GLX_RGBA_BIT, GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT, GLX_DOUBLEBUFFER, true, GLX_RED_SIZE, 1, GLX_GREEN_SIZE, 1, GLX_BLUE_SIZE, 1, GLX_DEPTH_SIZE, 24, None }; static int visual_attribs_layered[] = { GLX_RENDER_TYPE, GLX_RGBA_BIT, GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT, GLX_DOUBLEBUFFER, true, GLX_RED_SIZE, 8, GLX_GREEN_SIZE, 8, GLX_BLUE_SIZE, 8, GLX_ALPHA_SIZE, 8, GLX_DEPTH_SIZE, 24, None }; int fbcount; GLXFBConfig fbconfig = 0; XVisualInfo *vi = NULL; XSetWindowAttributes swa; swa.event_mask = StructureNotifyMask; swa.border_pixel = 0; unsigned long valuemask = CWBorderPixel | CWColormap | CWEventMask; if (OS::get_singleton()->is_layered_allowed()) { GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs_layered, &fbcount); ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED); for (int i = 0; i < fbcount; i++) { vi = (XVisualInfo *)glXGetVisualFromFBConfig(x11_display, fbc[i]); if (!vi) continue; XRenderPictFormat *pict_format = XRenderFindVisualFormat(x11_display, vi->visual); if (!pict_format) { XFree(vi); vi = NULL; continue; } fbconfig = fbc[i]; if (pict_format->direct.alphaMask > 0) { break; } } ERR_FAIL_COND_V(!fbconfig, ERR_UNCONFIGURED); swa.background_pixmap = None; swa.background_pixel = 0; swa.border_pixmap = None; valuemask |= CWBackPixel; } else { GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs, &fbcount); ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED); vi = glXGetVisualFromFBConfig(x11_display, fbc[0]); fbconfig = fbc[0]; } int (*oldHandler)(Display *, XErrorEvent *) = XSetErrorHandler(&ctxErrorHandler); switch (context_type) { case OLDSTYLE: { p->glx_context = glXCreateContext(x11_display, vi, 0, GL_TRUE); ERR_FAIL_COND_V(!p->glx_context, ERR_UNCONFIGURED); } break; case GLES_2_0_COMPATIBLE: { p->glx_context = glXCreateNewContext(x11_display, fbconfig, GLX_RGBA_TYPE, 0, true); ERR_FAIL_COND_V(!p->glx_context, ERR_UNCONFIGURED); } break; case GLES_3_0_COMPATIBLE: { static int context_attribs[] = { GLX_CONTEXT_MAJOR_VERSION_ARB, 3, GLX_CONTEXT_MINOR_VERSION_ARB, 3, GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB, GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB /*|GLX_CONTEXT_DEBUG_BIT_ARB*/, None }; p->glx_context = glXCreateContextAttribsARB(x11_display, fbconfig, NULL, true, context_attribs); ERR_FAIL_COND_V(ctxErrorOccurred || !p->glx_context, ERR_UNCONFIGURED); } break; } swa.colormap = XCreateColormap(x11_display, RootWindow(x11_display, vi->screen), vi->visual, AllocNone); x11_window = XCreateWindow(x11_display, RootWindow(x11_display, vi->screen), 0, 0, OS::get_singleton()->get_video_mode().width, OS::get_singleton()->get_video_mode().height, 0, vi->depth, InputOutput, vi->visual, valuemask, &swa); ERR_FAIL_COND_V(!x11_window, ERR_UNCONFIGURED); set_class_hint(x11_display, x11_window); XMapWindow(x11_display, x11_window); XSync(x11_display, False); XSetErrorHandler(oldHandler); glXMakeCurrent(x11_display, x11_window, p->glx_context); XFree(vi); return OK; } int ContextGL_X11::get_window_width() { XWindowAttributes xwa; XGetWindowAttributes(x11_display, x11_window, &xwa); return xwa.width; } int ContextGL_X11::get_window_height() { XWindowAttributes xwa; XGetWindowAttributes(x11_display, x11_window, &xwa); return xwa.height; } void ContextGL_X11::set_use_vsync(bool p_use) { static bool setup = false; static PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT = NULL; static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalMESA = NULL; static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalSGI = NULL; if (!setup) { setup = true; String extensions = glXQueryExtensionsString(x11_display, DefaultScreen(x11_display)); if (extensions.find("GLX_EXT_swap_control") != -1) glXSwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalEXT"); if (extensions.find("GLX_MESA_swap_control") != -1) glXSwapIntervalMESA = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalMESA"); if (extensions.find("GLX_SGI_swap_control") != -1) glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalSGI"); } int val = p_use ? 1 : 0; if (glXSwapIntervalMESA) { glXSwapIntervalMESA(val); } else if (glXSwapIntervalSGI) { glXSwapIntervalSGI(val); } else if (glXSwapIntervalEXT) { GLXDrawable drawable = glXGetCurrentDrawable(); glXSwapIntervalEXT(x11_display, drawable, val); } else return; use_vsync = p_use; } bool ContextGL_X11::is_using_vsync() const { return use_vsync; } ContextGL_X11::ContextGL_X11(::Display *p_x11_display, ::Window &p_x11_window, const OS::VideoMode &p_default_video_mode, ContextType p_context_type) : x11_window(p_x11_window) { default_video_mode = p_default_video_mode; x11_display = p_x11_display; context_type = p_context_type; double_buffer = false; direct_render = false; glx_minor = glx_major = 0; p = memnew(ContextGL_X11_Private); p->glx_context = 0; use_vsync = false; } ContextGL_X11::~ContextGL_X11() { release_current(); glXDestroyContext(x11_display, p->glx_context); memdelete(p); } #endif #endif