291 lines
9.2 KiB
C++
291 lines
9.2 KiB
C++
/*************************************************************************/
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/* context_gl_x11.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "context_gl_x11.h"
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#ifdef X11_ENABLED
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#if defined(OPENGL_ENABLED)
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define GLX_GLXEXT_PROTOTYPES
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#include <GL/glx.h>
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#include <GL/glxext.h>
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#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
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#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
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typedef GLXContext (*GLXCREATECONTEXTATTRIBSARBPROC)(Display *, GLXFBConfig, GLXContext, Bool, const int *);
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struct ContextGL_X11_Private {
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::GLXContext glx_context;
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};
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void ContextGL_X11::release_current() {
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glXMakeCurrent(x11_display, None, NULL);
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}
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void ContextGL_X11::make_current() {
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glXMakeCurrent(x11_display, x11_window, p->glx_context);
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}
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void ContextGL_X11::swap_buffers() {
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glXSwapBuffers(x11_display, x11_window);
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}
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static bool ctxErrorOccurred = false;
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static int ctxErrorHandler(Display *dpy, XErrorEvent *ev) {
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ctxErrorOccurred = true;
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return 0;
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}
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static void set_class_hint(Display *p_display, Window p_window) {
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XClassHint *classHint;
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/* set the name and class hints for the window manager to use */
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classHint = XAllocClassHint();
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if (classHint) {
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classHint->res_name = (char *)"Godot_Engine";
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classHint->res_class = (char *)"Godot";
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}
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XSetClassHint(p_display, p_window, classHint);
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XFree(classHint);
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}
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Error ContextGL_X11::initialize() {
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//const char *extensions = glXQueryExtensionsString(x11_display, DefaultScreen(x11_display));
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GLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = (GLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress((const GLubyte *)"glXCreateContextAttribsARB");
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ERR_FAIL_COND_V(!glXCreateContextAttribsARB, ERR_UNCONFIGURED);
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static int visual_attribs[] = {
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GLX_RENDER_TYPE, GLX_RGBA_BIT,
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GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
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GLX_DOUBLEBUFFER, true,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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GLX_DEPTH_SIZE, 24,
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None
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};
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static int visual_attribs_layered[] = {
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GLX_RENDER_TYPE, GLX_RGBA_BIT,
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GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
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GLX_DOUBLEBUFFER, true,
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GLX_RED_SIZE, 8,
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GLX_GREEN_SIZE, 8,
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GLX_BLUE_SIZE, 8,
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GLX_ALPHA_SIZE, 8,
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GLX_DEPTH_SIZE, 24,
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None
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};
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int fbcount;
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GLXFBConfig fbconfig = 0;
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XVisualInfo *vi = NULL;
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XSetWindowAttributes swa;
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swa.event_mask = StructureNotifyMask;
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swa.border_pixel = 0;
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unsigned long valuemask = CWBorderPixel | CWColormap | CWEventMask;
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if (OS::get_singleton()->is_layered_allowed()) {
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GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs_layered, &fbcount);
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ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED);
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for (int i = 0; i < fbcount; i++) {
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vi = (XVisualInfo *)glXGetVisualFromFBConfig(x11_display, fbc[i]);
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if (!vi)
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continue;
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XRenderPictFormat *pict_format = XRenderFindVisualFormat(x11_display, vi->visual);
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if (!pict_format) {
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XFree(vi);
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vi = NULL;
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continue;
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}
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fbconfig = fbc[i];
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if (pict_format->direct.alphaMask > 0) {
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break;
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}
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}
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XFree(fbc);
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ERR_FAIL_COND_V(!fbconfig, ERR_UNCONFIGURED);
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swa.background_pixmap = None;
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swa.background_pixel = 0;
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swa.border_pixmap = None;
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valuemask |= CWBackPixel;
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} else {
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GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs, &fbcount);
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ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED);
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vi = glXGetVisualFromFBConfig(x11_display, fbc[0]);
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fbconfig = fbc[0];
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XFree(fbc);
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}
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int (*oldHandler)(Display *, XErrorEvent *) = XSetErrorHandler(&ctxErrorHandler);
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switch (context_type) {
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case OLDSTYLE: {
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p->glx_context = glXCreateContext(x11_display, vi, 0, GL_TRUE);
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ERR_FAIL_COND_V(!p->glx_context, ERR_UNCONFIGURED);
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} break;
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case GLES_2_0_COMPATIBLE: {
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p->glx_context = glXCreateNewContext(x11_display, fbconfig, GLX_RGBA_TYPE, 0, true);
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ERR_FAIL_COND_V(!p->glx_context, ERR_UNCONFIGURED);
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} break;
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case GLES_3_0_COMPATIBLE: {
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static int context_attribs[] = {
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GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
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GLX_CONTEXT_MINOR_VERSION_ARB, 3,
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GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
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GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB /*|GLX_CONTEXT_DEBUG_BIT_ARB*/,
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None
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};
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p->glx_context = glXCreateContextAttribsARB(x11_display, fbconfig, NULL, true, context_attribs);
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ERR_FAIL_COND_V(ctxErrorOccurred || !p->glx_context, ERR_UNCONFIGURED);
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} break;
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}
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swa.colormap = XCreateColormap(x11_display, RootWindow(x11_display, vi->screen), vi->visual, AllocNone);
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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);
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XStoreName(x11_display, x11_window, "Godot Engine");
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ERR_FAIL_COND_V(!x11_window, ERR_UNCONFIGURED);
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set_class_hint(x11_display, x11_window);
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XMapWindow(x11_display, x11_window);
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XSync(x11_display, False);
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XSetErrorHandler(oldHandler);
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glXMakeCurrent(x11_display, x11_window, p->glx_context);
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XFree(vi);
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return OK;
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}
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int ContextGL_X11::get_window_width() {
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XWindowAttributes xwa;
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XGetWindowAttributes(x11_display, x11_window, &xwa);
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return xwa.width;
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}
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int ContextGL_X11::get_window_height() {
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XWindowAttributes xwa;
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XGetWindowAttributes(x11_display, x11_window, &xwa);
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return xwa.height;
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}
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void *ContextGL_X11::get_glx_context() {
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if (p != NULL) {
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return p->glx_context;
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} else {
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return NULL;
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}
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}
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void ContextGL_X11::set_use_vsync(bool p_use) {
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static bool setup = false;
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static PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT = NULL;
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static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalMESA = NULL;
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static PFNGLXSWAPINTERVALSGIPROC glXSwapIntervalSGI = NULL;
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if (!setup) {
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setup = true;
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String extensions = glXQueryExtensionsString(x11_display, DefaultScreen(x11_display));
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if (extensions.find("GLX_EXT_swap_control") != -1)
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glXSwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalEXT");
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if (extensions.find("GLX_MESA_swap_control") != -1)
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glXSwapIntervalMESA = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalMESA");
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if (extensions.find("GLX_SGI_swap_control") != -1)
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glXSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte *)"glXSwapIntervalSGI");
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}
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int val = p_use ? 1 : 0;
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if (glXSwapIntervalMESA) {
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glXSwapIntervalMESA(val);
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} else if (glXSwapIntervalSGI) {
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glXSwapIntervalSGI(val);
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} else if (glXSwapIntervalEXT) {
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GLXDrawable drawable = glXGetCurrentDrawable();
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glXSwapIntervalEXT(x11_display, drawable, val);
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} else
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return;
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use_vsync = p_use;
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}
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bool ContextGL_X11::is_using_vsync() const {
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return use_vsync;
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}
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ContextGL_X11::ContextGL_X11(::Display *p_x11_display, ::Window &p_x11_window, const OS::VideoMode &p_default_video_mode, ContextType p_context_type) :
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x11_window(p_x11_window) {
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default_video_mode = p_default_video_mode;
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x11_display = p_x11_display;
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context_type = p_context_type;
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double_buffer = false;
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direct_render = false;
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glx_minor = glx_major = 0;
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p = memnew(ContextGL_X11_Private);
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p->glx_context = 0;
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use_vsync = false;
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}
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ContextGL_X11::~ContextGL_X11() {
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release_current();
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glXDestroyContext(x11_display, p->glx_context);
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memdelete(p);
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}
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#endif
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#endif
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