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jakw |
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#include "OpenGLContext.h"
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#include <GLFW/glfw3.h>
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#ifdef __LINUX__
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#define GLFW_EXPOSE_NATIVE_X11
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#define GLFW_EXPOSE_NATIVE_GLX
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#include <cstring>
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#include <GLFW/glfw3native.h>
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#endif
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struct OpenGLContext::OpenGLContextInfo{
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GLFWmonitor* monitor;
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GLFWwindow* window;
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OpenGLContextInfo() : monitor(NULL), window(NULL){}
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};
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void error_callback(int error, const char* description){
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std::cerr << "GLFW error code " << error << " " << description << std::endl;
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}
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std::vector<ScreenInfo> OpenGLContext::GetScreenInfo(){
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std::vector<ScreenInfo> ret;
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if (!glfwInit())
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std::cerr << "Could not initialize GLFW!" << std::endl;
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glfwSetErrorCallback(error_callback);
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int nScreens = 0;
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GLFWmonitor **monitors;
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monitors = glfwGetMonitors(&nScreens);
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for(int i=0; i<nScreens; i++){
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GLFWmonitor *monitor = monitors[i];
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const GLFWvidmode *videoMode = glfwGetVideoMode(monitor);
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ScreenInfo screen;
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screen.resX = videoMode->width;
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screen.resY = videoMode->height;
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const char *screenName = glfwGetMonitorName(monitor);
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screen.name = screenName;
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ret.push_back(screen);
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}
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//glfwTerminate();
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return ret;
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}
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OpenGLContext::OpenGLContext(uint _screenNum) : screenNum(_screenNum), screenResX(0), screenResY(0){
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contextInfo = new OpenGLContextInfo();
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if (!glfwInit())
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std::cerr << "Could not initialize GLFW!" << std::endl;
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glfwSetErrorCallback(error_callback);
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int nScreens = 0;
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GLFWmonitor **monitors;
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monitors = glfwGetMonitors(&nScreens);
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if((unsigned int)nScreens < screenNum+1)
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std::cerr << "Could not open screen " << screenNum << std::endl;
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contextInfo->monitor = monitors[screenNum];
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const GLFWvidmode *videoMode = glfwGetVideoMode(contextInfo->monitor);
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screenResX = videoMode->width;
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screenResY = videoMode->height;
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// Create fullscreen window
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contextInfo->window = glfwCreateWindow(screenResX, screenResY, "GLFW OpenGL Context", contextInfo->monitor, NULL);
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#ifdef __unix__
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Display *display = glfwGetX11Display();
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Window window = glfwGetX11Window(contextInfo->window);
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// // Set swap interval to 1 for standard vsync
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// typedef GLvoid (*glXSwapIntervalSGIFunc) (GLint);
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// const char *glx_extensions = glXQueryExtensionsString(display, screenNum);
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// if (strstr(glx_extensions, "GLX_SGI_swap_control")) {
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// PFNGLXSWAPINTERVALSGIPROC SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddressARB((const GLubyte*)"glXSwapIntervalSGI");
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// SwapIntervalSGI(1);
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// } else if (strstr(glx_extensions, "GLX_EXT_swap_control")) {
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PFNGLXSWAPINTERVALEXTPROC SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)glXGetProcAddressARB((const GLubyte*)"glXSwapIntervalEXT");
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SwapIntervalEXT(display, window, 1);
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// } else {
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// std::cerr << "OpenGLContext.Unix Error: Could not access swap interval extension!" << std::endl;
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// }
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#endif
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glfwMakeContextCurrent(contextInfo->window);
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// Set vsync (swap interval 1)
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glfwSwapInterval(1);
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// Adjust gamma to one
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this->setGamma(1.0);
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}
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void OpenGLContext::setGamma(float gamma){
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glfwSetGamma(contextInfo->monitor, gamma);
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}
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void OpenGLContext::makeContextCurrent(){
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glfwMakeContextCurrent(contextInfo->window);
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}
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void OpenGLContext::flush(){
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// Swap buffers
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glfwSwapBuffers(contextInfo->window);
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// Poll events in order not to lock up
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glfwPollEvents();
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//glfwWaitEvents();
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glFinish();
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}
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OpenGLContext::~OpenGLContext(){
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glfwDestroyWindow(contextInfo->window);
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glfwTerminate();
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delete contextInfo;
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}
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