diff options
Diffstat (limited to 'LibOVR/Src/Displays/OVR_Linux_SDKWindow.cpp')
| -rw-r--r-- | LibOVR/Src/Displays/OVR_Linux_SDKWindow.cpp | 649 |
1 files changed, 649 insertions, 0 deletions
diff --git a/LibOVR/Src/Displays/OVR_Linux_SDKWindow.cpp b/LibOVR/Src/Displays/OVR_Linux_SDKWindow.cpp new file mode 100644 index 0000000..3d76f69 --- /dev/null +++ b/LibOVR/Src/Displays/OVR_Linux_SDKWindow.cpp @@ -0,0 +1,649 @@ +/******************************************************************************* + +Filename : OVR_Linux_SDKWindow.cpp +Content : SDK generated Linux window. +Created : October 1, 2014 +Authors : James Hughes + +Copyright : Copyright 2014 Oculus VR, LLC All Rights reserved. + +Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License"); +you may not use the Oculus VR Rift SDK except in compliance with the License, +which is provided at the time of installation or download, or which +otherwise accompanies this software in either electronic or hard copy form. + +You may obtain a copy of the License at + +http://www.oculusvr.com/licenses/LICENSE-3.2 + +Unless required by applicable law or agreed to in writing, the Oculus VR SDK +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. + +*******************************************************************************/ + +#include "OVR_Linux_SDKWindow.h" +#include "../Kernel/OVR_Log.h" +#include "../Kernel/OVR_Log.h" +#include "../../../3rdParty/EDID/edid.h" + +namespace OVR { + +// Forward declarations +static Window constructWindow(struct _XDisplay* display, int xscreen, + XVisualInfo* xvisual, + const LinuxDeviceScreen& screen); + +static XRRModeInfo* findModeByXID(XRRScreenResources* screen, RRMode xid) +{ + for (int m = 0; m < screen->nmode; ++m) + { + XRRModeInfo* mode = &screen->modes[m]; + if (xid == mode->id) + { + return mode; + } + } + return NULL; +} + +/// Retrieves a list of available device screens on which we can build +/// SDK windows. Returns number of devices found. +/// screens Array which this function will populate. +/// maxNumScreens Maximum number of screens to store in screens. +static int getDeviceScreens(LinuxDeviceScreen* screens, int maxNumDevices) +{ + struct _XDisplay* disp = XOpenDisplay(NULL); + if (!disp) + { + OVR::LogError("[SDKWindow] Unable to open X Display."); + return 0; + } + + int numDevices = 0; + int numScreens = XScreenCount(disp); + for (int i = 0; i < numScreens; ++i) + { + // Screen root is used to detect what video output the crtc is using. + Window sr = XRootWindow(disp, i); + XRRScreenResources* screen = XRRGetScreenResources(disp, sr); + + for (int ii = 0; ii < screen->ncrtc; ++ii) + { + XRRCrtcInfo* crtcInfo = XRRGetCrtcInfo(disp, screen, screen->crtcs[ii]); + + if (0 == crtcInfo->noutput) + { + XRRFreeCrtcInfo(crtcInfo); + continue; + } + + bool foundOutput = false; + RROutput output = crtcInfo->outputs[0]; + for (int k = 0; k < crtcInfo->noutput; ++k) + { + XRROutputInfo* outputInfo = + XRRGetOutputInfo(disp, screen, crtcInfo->outputs[k]); + for (int kk = 0 ; kk < outputInfo->nmode; ++kk) + { + if (outputInfo->modes[kk] == crtcInfo->mode) + { + output = crtcInfo->outputs[k]; + foundOutput = true; + break; + } + } + XRRFreeOutputInfo(outputInfo); + if (foundOutput) { break; } + } + + if (!foundOutput) + { + XRRFreeCrtcInfo(crtcInfo); + continue; + } + + XRROutputInfo* outputInfo = XRRGetOutputInfo(disp, screen, output); + if (RR_Connected != outputInfo->connection) + { + XRRFreeOutputInfo(outputInfo); + XRRFreeCrtcInfo(crtcInfo); + continue; + } + + // Read EDID associated with crtc. + MonitorInfo* mi = read_edid_data(disp, output); + if (mi == NULL) + { + XRRFreeOutputInfo(outputInfo); + XRRFreeCrtcInfo(crtcInfo); + continue; + } + + if (strcmp(mi->manufacturer_code, "OVR") == 0) + { + XRRModeInfo* modeInfo = findModeByXID(screen, crtcInfo->mode); + + DistortionRotation desiredRot = DistRotateNone; + if (mi->product_code == 3) + { + // This is a DK2, we may have to rotate our output. + // If we don't have to, we should alert the user that + // rotating the display using the DM or graphics + // card settings is highly non-optimal. + desiredRot = DistRotateCCW90; + if (crtcInfo->rotation != RR_Rotate_0) + { + OVR::LogError("Please do not rotate your rift's screen."); + + if (crtcInfo->rotation == RR_Rotate_90) + { + // The user has manually rotated the screen. + // So apply no rotation on our end. + desiredRot = DistRotateNone; + } + } + } + else + { + if (crtcInfo->rotation != RR_Rotate_0) + { + OVR::LogError("Please do not rotate your rift's screen."); + } + } + + int width = modeInfo->width; + int height = modeInfo->height; + + // Swap width / height if display is rotated (shouldn't be on linux). + if ( crtcInfo->rotation == RR_Rotate_90 + || crtcInfo->rotation == RR_Rotate_270) + { + width = modeInfo->height; + height = modeInfo->width; + } + + // Push detected monitor. + screens[numDevices].set(i, screen->crtcs[ii], desiredRot, + mi->product_code, width, height, + crtcInfo->x, crtcInfo->y); + ++numDevices; + } + + delete mi; + + if (numDevices == maxNumDevices) + { + XRRFreeOutputInfo(outputInfo); + XRRFreeCrtcInfo(crtcInfo); + XRRFreeScreenResources(screen); + OVR::LogError("[SDKWindow] Maxed out number of devices.."); + XCloseDisplay(disp); + return numDevices; + } + + XRRFreeOutputInfo(outputInfo); + XRRFreeCrtcInfo(crtcInfo); + } + + XRRFreeScreenResources(screen); + } + XCloseDisplay(disp); + return numDevices; +} + + +LinuxDeviceScreen SDKWindow::findDevScreenForHMD(const ovrHmd& hmd) +{ + return findDevScreenForDevID(hmd->DisplayDeviceName); +} + +LinuxDeviceScreen SDKWindow::findDevScreenForDevID(const char* deviceIDIn) +{ + const int maxNumDevices = 5; + LinuxDeviceScreen screens[maxNumDevices]; + int numDevices = getDeviceScreens(screens, maxNumDevices); + + if (numDevices > 0) + { + // Identify target for SDK window via hmd info. + for (int i = 0; i < numDevices; ++i) + { + LinuxDeviceScreen& screen = screens[i]; + + char deviceID[32]; + OVR_sprintf(deviceID, 32, "OVR%04d-%d", + screen.productCode, screen.crtcid); + + if (strcmp(deviceIDIn, deviceID) == 0) + { + return screen; + } + } + } + + return LinuxDeviceScreen(); +} + +DistortionRotation SDKWindow::getRotation(const ovrHmd& hmd) +{ + LinuxDeviceScreen screen = findDevScreenForHMD(hmd); + if (screen.isValid()) + { + return screen.rotation; + } + else + { + return DistRotateNone; + } +} + + +bool SDKWindow::getVisualFromDrawable(GLXDrawable drawable, XVisualInfo* vinfoOut) +{ + struct _XDisplay* display = glXGetCurrentDisplay(); + + unsigned int value; + glXQueryDrawable(display, drawable, GLX_FBCONFIG_ID, &value); + const int attribs[] = {GLX_FBCONFIG_ID, (int)value, None}; + int screen; + glXQueryContext(display, glXGetCurrentContext(), GLX_SCREEN, &screen); + int numElems; + GLXFBConfig* config = glXChooseFBConfig(display, screen, attribs, &numElems); + if (numElems > 0) + { + XVisualInfo* chosen = glXGetVisualFromFBConfig(display, *config); + *vinfoOut = *chosen; + XFree(config); + return true; + } + return false; +} + +SDKWindow::SDKWindow(const ovrHmd& hmd) : + mXDisplay(NULL), + mXScreen(-1), + mXVisual(NULL), + mXUniqueContext(-1), + mXWindow(0), + mFBConfigID(0) +{ + OVR_UNUSED(hmd); +} + +SDKWindow::~SDKWindow() +{ + if (mXWindow) + { + XDeleteContext(mXDisplay, mXWindow, mXUniqueContext); + XUnmapWindow(mXDisplay, mXWindow); + XDestroyWindow(mXDisplay, mXWindow); + mXWindow = static_cast<Window>(0); + } + + if (mXVisual) + { + XFree(mXVisual); + mXVisual = NULL; + } + + if (mXDisplay) + { + XCloseDisplay(mXDisplay); + } +} + +void SDKWindow::buildVisualAndWindow(const LinuxDeviceScreen& devScreen) +{ + mXDisplay = XOpenDisplay(NULL); + mXUniqueContext = XUniqueContext(); + mXScreen = devScreen.screen; + mFBConfigID = chooseFBConfigID(mXDisplay, mXScreen); + + mXVisual = getVisual(mXDisplay, mFBConfigID, mXScreen); + if (mXVisual != NULL) + { + mXWindow = constructWindow(mXDisplay, mXScreen, mXVisual, devScreen); + mDeviceScreen = devScreen; + } +} + +// Used in chooseVisual. May need to expose this to the end use so they can +// choose an appropriate framebuffer configuration. +struct FBConfig +{ + FBConfig() : + redBits(8), + greenBits(8), + blueBits(8), + alphaBits(8), + depthBits(8), + stencilBits(-1), + doubleBuffer(true), + auxBuffers(-1) + {} + + int redBits; + int greenBits; + int blueBits; + int alphaBits; + int depthBits; + int stencilBits; + bool doubleBuffer; + int auxBuffers; + + int xcfg; +}; + +static int fbCalcContrib(int desired, int current) +{ + int diff = desired - current; + if (current != -1) { return diff * diff; } + else { return 0; } +} + +// Choose frame buffer configuration and return fbConfigID. +int SDKWindow::chooseFBConfigID(struct _XDisplay* display, int xscreen) +{ + int nativeCount = 0; + GLXFBConfig* nativeConfigs = + glXGetFBConfigs(display, xscreen, &nativeCount); + if (!nativeCount) + { + OVR::LogError("[SDKWindow] No valid frame buffer configurations found."); + return 0; + } + + FBConfig* usables = static_cast<FBConfig*>(calloc(nativeCount, sizeof(FBConfig))); + int numUsables = 0; + + for (int i = 0; i < nativeCount; ++i) + { + GLXFBConfig native = nativeConfigs[i]; + FBConfig* usable = &usables[numUsables]; + int v = 0; + + // Only frame buffer configcs with attached visuals. + glXGetFBConfigAttrib(display, native, GLX_VISUAL_ID, &v); + if (!v) { continue; } + + // Only RGBA frame buffers. + glXGetFBConfigAttrib(display, native, GLX_RENDER_TYPE, &v); + if (!(v & GLX_RGBA_BIT)) { continue; } + + glXGetFBConfigAttrib(display, native, GLX_DRAWABLE_TYPE, &v); + if (!(v & GLX_WINDOW_BIT)) { continue; } + + glXGetFBConfigAttrib(display, native, GLX_DEPTH_SIZE, &usable->depthBits); + glXGetFBConfigAttrib(display, native, GLX_STENCIL_SIZE, &usable->stencilBits); + + glXGetFBConfigAttrib(display, native, GLX_RED_SIZE, &usable->redBits); + glXGetFBConfigAttrib(display, native, GLX_GREEN_SIZE, &usable->greenBits); + glXGetFBConfigAttrib(display, native, GLX_BLUE_SIZE, &usable->blueBits); + glXGetFBConfigAttrib(display, native, GLX_ALPHA_SIZE, &usable->alphaBits); + + glXGetFBConfigAttrib(display, native, GLX_ALPHA_SIZE, &usable->auxBuffers); + + glXGetFBConfigAttrib(display, native, GLX_DOUBLEBUFFER, &v); + usable->doubleBuffer = v ? true : false; + + glXGetFBConfigAttrib(display, native, GLX_FBCONFIG_ID, &usable->xcfg); + + ++numUsables; + } + + // We really want std::numeric_limits<int>::max() instead of hardcoded vals. + const int MostMissing = 100; + int leastMissing = MostMissing; + int leastBias = MostMissing; + + const FBConfig* closest = NULL; + + // Desired is currently the default config built by constructor. + FBConfig desired; + + for (int i = 0; i < numUsables; ++i) + { + const FBConfig* cur = &usables[i]; + + if (desired.doubleBuffer != cur->doubleBuffer) { continue; } + + int missing = 0; + if (desired.alphaBits > 0 && cur->alphaBits == 0) { ++missing; } + if (desired.depthBits > 0 && cur->depthBits == 0) { ++missing; } + if (desired.stencilBits > 0 && cur->stencilBits == 0) { ++missing; } + if (desired.redBits > 0 && desired.redBits != cur->redBits) { ++missing; } + if (desired.greenBits > 0 && desired.greenBits != cur->greenBits) { ++missing; } + if (desired.blueBits > 0 && desired.blueBits != cur->blueBits) { ++missing; } + + int bias = fbCalcContrib(desired.redBits, cur->redBits) + + fbCalcContrib(desired.greenBits, cur->greenBits) + + fbCalcContrib(desired.blueBits, cur->blueBits) + + fbCalcContrib(desired.alphaBits, cur->alphaBits) + + fbCalcContrib(desired.depthBits, cur->depthBits) + + fbCalcContrib(desired.stencilBits, cur->stencilBits); + + if (missing < leastMissing) + { + closest = cur; + } + else if (missing == leastMissing) + { + // Now select against squared differences. + if (bias < leastBias) + { + closest = cur; + } + } + + if (closest == cur) + { + leastMissing = missing; + leastBias = bias; + } + } + + if (closest == NULL) + { + OVR::LogError("[SDKWindow] Failed to select appropriate frame buffer."); + XFree(nativeConfigs); + free(usables); + return 0; + } + + int retVal = closest->xcfg; + + XFree(nativeConfigs); + free(usables); + + return retVal; +} + +// Obtain visual from frame buffer configuration ID. +XVisualInfo* SDKWindow::getVisual(struct _XDisplay* display, + int fbConfigID, int xscreen) +{ + GLXFBConfig* cfg = getGLXFBConfig(display, fbConfigID, xscreen); + XVisualInfo* viOut = NULL; + if (cfg != NULL) + { + viOut = glXGetVisualFromFBConfig(display, *cfg); + XFree(cfg); + cfg = NULL; + } + else + { + OVR::LogError("Unable to find fb config ID."); + } + return viOut; +} + +// GLXFBConfig pointer from frame buffer configuration ID. You must call +// XFree on the GLXFBConfig pointer. +GLXFBConfig* SDKWindow::getGLXFBConfig(struct _XDisplay* display, + int fbConfigID, int xscreen) +{ + const int attribs[] = {GLX_FBCONFIG_ID, (int)fbConfigID, None}; + int numElems; + + GLXFBConfig* config = glXChooseFBConfig(display, xscreen, attribs, &numElems); + if (numElems > 0) + { + return config; + } + else + { + return NULL; + } +} + + +static int gXLastError = -1; +static int handleXError(struct _XDisplay* display, XErrorEvent* event) +{ + OVR_UNUSED(display); + gXLastError = event->error_code; + return 0; +} + +static void obtainXErrorHandler() +{ + gXLastError = Success; + XSetErrorHandler(handleXError); +} + +static void releaseXErrorHandler(struct _XDisplay* display) +{ + XSync(display, False); + XSetErrorHandler(NULL); +} + +// Returns 0 on error, otherwise a valid X window is returned. +static Window constructWindow(struct _XDisplay* xDisp, int xScreen, + XVisualInfo* xVisual, + const LinuxDeviceScreen& devScreen) +{ + XSetWindowAttributes wa; + + Window root = XRootWindow(xDisp, xScreen); + Window xWindowOut = 0; + + // Create Window + { + Colormap xWinColorMapOut = XCreateColormap( + xDisp, root, xVisual->visual, AllocNone); + unsigned long wamask = CWBorderPixel | CWColormap | CWEventMask; + + wa.colormap = xWinColorMapOut; + wa.border_pixel = 0; + wa.event_mask = StructureNotifyMask | ExposureMask | FocusChangeMask + | VisibilityChangeMask | EnterWindowMask | LeaveWindowMask + | PropertyChangeMask; + + obtainXErrorHandler(); + + xWindowOut = XCreateWindow(xDisp, root, + 0, 0, + devScreen.width, devScreen.height, + 0, + xVisual->depth, + InputOutput, + xVisual->visual, + wamask, + &wa); + + releaseXErrorHandler(xDisp); + + if (!xWindowOut) + { + OVR::LogError("[SDKWindow] Failed to create SDK window."); + return 0; + } + + XFreeColormap(xDisp, xWinColorMapOut); + } + + // OVERRIDE REDIRECT. + XSetWindowAttributes attributes; + attributes.override_redirect = True; + XChangeWindowAttributes(xDisp, xWindowOut, + CWOverrideRedirect, &attributes); + + // Show the window (do this in full screen or windowed). + XMapRaised(xDisp, xWindowOut); + XFlush(xDisp); + + // Position ourselves manually since there should be no WM managing us. + XRaiseWindow(xDisp, xWindowOut); + XMoveWindow(xDisp, xWindowOut, devScreen.offsetX, devScreen.offsetY); + XResizeWindow(xDisp, xWindowOut, devScreen.width, devScreen.height); + + XFlush(xDisp); + + // WM Backup in case there still exists a WM managing us... + Atom NET_WM_BYPASS_COMPOSITOR = + XInternAtom(xDisp, "_NET_WM_BYPASS_COMPOSITOR", False); + Atom NET_WM_STATE = + XInternAtom(xDisp, "_NET_WM_STATE", False); + Atom NET_WM_STATE_FULLSCREEN = + XInternAtom(xDisp, "_NET_WM_STATE_FULLSCREEN", False); + Atom NET_ACTIVE_WINDOW = + XInternAtom(xDisp, "_NET_ACTIVE_WINDOW", False); + + // Bypass compositor if we are under a compositing WM. + // Just in case a WM ignores our override_redirect. + if (NET_WM_BYPASS_COMPOSITOR) + { + const unsigned long bypass = 1; + XChangeProperty(xDisp, xWindowOut, + NET_WM_BYPASS_COMPOSITOR, + XA_CARDINAL, 32, PropModeReplace, + (unsigned char*)&bypass, 1); + } + + if (NET_WM_STATE && NET_WM_STATE_FULLSCREEN) + { + // BACKUP: If we are still managed by a WM we want fullscreen. + const int EWMH_STATE_ADD = 1; + + if (NET_ACTIVE_WINDOW) + { + XEvent event; + memset(&event, 0, sizeof(event)); + + event.type = ClientMessage; + event.xclient.window = xWindowOut; + event.xclient.format = 32; + event.xclient.message_type = NET_ACTIVE_WINDOW; + event.xclient.data.l[0] = 1; + event.xclient.data.l[1] = 0; + + XSendEvent(xDisp, root, False, + SubstructureNotifyMask | SubstructureRedirectMask, + &event); + } + + XEvent event; + memset(&event, 0, sizeof(event)); + + event.type = ClientMessage; + event.xclient.window = xWindowOut; + event.xclient.format = 32; + event.xclient.message_type = NET_WM_STATE; + event.xclient.data.l[0] = EWMH_STATE_ADD; + event.xclient.data.l[1] = NET_WM_STATE_FULLSCREEN; + event.xclient.data.l[2] = 0; + event.xclient.data.l[3] = 1; + + XSendEvent(xDisp, root, False, + SubstructureNotifyMask | SubstructureRedirectMask, + &event); + } + + return xWindowOut; +} + +} // namespace OVR + |