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https://github.com/CrispyPin/sinpin-vr.git
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init - display part of screen on a vr overlay
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commit
8651d65a0d
5 changed files with 5722 additions and 0 deletions
1
.gitignore
vendored
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.gitignore
vendored
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overlay
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Makefile
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Makefile
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build:
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CPATH=. g++ -lX11 -lglfw -lGL openvr/libopenvr_api.so src/main.cpp -o overlay
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run: build
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./overlay
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BIN
openvr/libopenvr_api.so
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BIN
openvr/libopenvr_api.so
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openvr/openvr.h
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openvr/openvr.h
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113
src/main.cpp
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src/main.cpp
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#include <signal.h>
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#include <assert.h>
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#include <X11/extensions/Xcomposite.h>
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#include <X11/Xutil.h>
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#include <GLFW/glfw3.h>
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#include "openvr/openvr.h"
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static vr::ETrackingUniverseOrigin TRACKING_UNIVERSE = vr::ETrackingUniverseOrigin::TrackingUniverseStanding;
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#define WIDTH 1024
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#define HEIGHT 1024
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Display *xdisplay;
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Window root_window;
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vr::IVRSystem *ovr_sys;
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vr::IVROverlay *ovr_overlay;
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vr::VROverlayHandle_t handle;
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GLuint overlaytexture;
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GLFWwindow *gl_window;
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void cleanup(int _sig = 0);
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int main(int argc, char **argv)
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{
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signal(SIGINT, cleanup);
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{
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xdisplay = XOpenDisplay(nullptr);
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assert(xdisplay != nullptr);
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printf("Created X11 display\n");
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root_window = XRootWindow(xdisplay, 0);
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}
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{
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assert(glfwInit() == true);
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glfwWindowHint(GLFW_VISIBLE, false);
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gl_window = glfwCreateWindow(WIDTH, HEIGHT, "Overlay", nullptr, nullptr);
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assert(gl_window != nullptr);
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glfwMakeContextCurrent(gl_window);
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printf("Created GLFW context\n");
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}
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{
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vr::EVRInitError init_err;
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ovr_sys = vr::VR_Init(&init_err, vr::EVRApplicationType::VRApplication_Overlay);
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assert(init_err == 0);
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ovr_overlay = vr::VROverlay();
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printf("Initialized openvr overlay\n");
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}
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{
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auto overlay_err = ovr_overlay->CreateOverlay("deskpot", "Desktop view", &handle);
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assert(overlay_err == 0);
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ovr_overlay->ShowOverlay(handle);
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ovr_overlay->SetOverlayTextureColorSpace(handle, vr::EColorSpace::ColorSpace_Gamma);
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ovr_overlay->SetOverlayWidthInMeters(handle, 0.5f);
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uint8_t col[4] = {20, 100, 100, 255};
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ovr_overlay->SetOverlayRaw(handle, &col, 1, 1, 4);
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printf("Created overlay instance\n");
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}
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{
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vr::HmdMatrix34_t transform;
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auto err = ovr_overlay->GetOverlayTransformAbsolute(handle, &TRACKING_UNIVERSE, &transform);
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assert(err == 0);
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transform.m[1][1] = -1;
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err = ovr_overlay->SetOverlayTransformAbsolute(handle, TRACKING_UNIVERSE, &transform);
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assert(err == 0);
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}
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{
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glGenTextures(1, &overlaytexture);
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glBindTexture(GL_TEXTURE_2D, overlaytexture);
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}
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vr::Texture_t vr_texture;
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vr_texture.eColorSpace = vr::EColorSpace::ColorSpace_Auto;
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vr_texture.eType = vr::ETextureType::TextureType_OpenGL;
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while (1)
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{
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auto frame = XGetImage(xdisplay, root_window, 0, 0, WIDTH, HEIGHT, AllPlanes, ZPixmap);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, WIDTH, HEIGHT, 0, GL_BGRA, GL_UNSIGNED_BYTE, frame->data);
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XDestroyImage(frame);
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{
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vr_texture.handle = (void *)(uintptr_t)overlaytexture;
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auto set_err = ovr_overlay->SetOverlayTexture(handle, &vr_texture);
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if (set_err)
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{
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printf("error setting texture: %d\n", set_err);
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assert(set_err == 0);
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}
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}
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glfwSwapBuffers(gl_window);
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ovr_overlay->WaitFrameSync(20);
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}
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cleanup();
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return 0;
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}
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void cleanup(int _sig)
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{
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printf("\nShutting down\n");
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vr::VR_Shutdown();
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glfwDestroyWindow(gl_window);
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glfwTerminate();
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exit(0);
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}
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