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- #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;
-
- 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() {
-
- 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
- };
- int fbcount;
- GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs, &fbcount);
- ERR_FAIL_COND_V(!fbc, ERR_UNCONFIGURED);
- XVisualInfo *vi = glXGetVisualFromFBConfig(x11_display, fbc[0]);
- XSetWindowAttributes swa;
- swa.colormap = XCreateColormap(x11_display, RootWindow(x11_display, vi->screen), vi->visual, AllocNone);
- swa.border_pixel = 0;
- swa.event_mask = StructureNotifyMask;
-
- 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, CWBorderPixel | CWColormap | CWEventMask, &swa);
- ERR_FAIL_COND_V(!x11_window, ERR_UNCONFIGURED);
- set_class_hint(x11_display, x11_window);
- XMapWindow(x11_display, x11_window);
-
- int (*oldHandler)(Display *, XErrorEvent *) =
- XSetErrorHandler(&ctxErrorHandler);
- if (!opengl_3_context) {
-
- p->glx_context = glXCreateContext(x11_display, vi, 0, GL_TRUE);
- } else {
- 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 ,
- None
- };
- p->glx_context = glXCreateContextAttribsARB(x11_display, fbc[0], NULL, true, context_attribs);
- ERR_EXPLAIN("Could not obtain an OpenGL 3.3 context!");
- ERR_FAIL_COND_V(ctxErrorOccurred || !p->glx_context, ERR_UNCONFIGURED);
- }
- XSync(x11_display, False);
- XSetErrorHandler(oldHandler);
- glXMakeCurrent(x11_display, x11_window, p->glx_context);
-
-
- XFree(vi);
- XFree(fbc);
- 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, bool p_opengl_3_context) :
- x11_window(p_x11_window) {
- default_video_mode = p_default_video_mode;
- x11_display = p_x11_display;
- opengl_3_context = p_opengl_3_context;
- 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
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