当前,如果我的窗口足够小,那么我亲爱的ImGui应用程序(主要是带有一些自定义OpenGL渲染的演示窗口)的运行速度约为2000 fps。如何限制显示器的刷新率(甚至仅为60fps)?
我当前的代码如下:
static void glfw_error_callback(int error, const char * description)
{
fprintf(stderr, "Glfw Error %d: %s\n", error, description);
}
int main(int, char **)
{
// Setup window
glfwSetErrorCallback(glfw_error_callback);
if (!glfwInit())
return 1;
const char * glsl_version = "#version 150";
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); // 3.2+ only
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // Required on Mac
glfwWindowHint(GLFW_REFRESH_RATE, 60);
// Create window with graphics context
GLFWwindow * window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+OpenGL3 example", NULL, NULL);
if (window == NULL)
return 1;
glfwMakeContextCurrent(window);
glfwSwapInterval(1); // Enable vsync
bool err = gl3wInit() != 0;
if (err) {
fprintf(stderr, "Failed to initialize OpenGL loader!\n");
return 1;
}
// Setup Dear ImGui binding
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO & io = ImGui::GetIO();
(void)io;
// io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
ImGui_ImplGlfw_InitForOpenGL(window, true);
ImGui_ImplOpenGL3_Init(glsl_version);
// Other stylistic setup
...
while (!glfwWindowShouldClose(window))
{
glfwPollEvents();
// Create ImGui Windows
// Rendering
ImGui::Render();
int display_w, display_h;
glfwMakeContextCurrent(window);
glfwGetFramebufferSize(window, &display_w, &display_h);
glViewport(0, 0, display_w, display_h);
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
glfwMakeContextCurrent(window);
glfwSwapBuffers(window);
}
// Cleanup
return 0;
}
如您所见,除了我尝试使用{{1}来限制刷新率的尝试失败外,它与ImGui示例中提供的GLFW和OpenGL 3的原始示例代码没有任何区别(几乎没有任何区别)。 },据我了解,它只影响全屏模式下的窗口。另外,我认为glfwWindowHint(GLFW_REFRESH_RATE, 60)
可能还会将刷新率限制为监视器的刷新率,但似乎也没有这样做。任何帮助将不胜感激。
编辑:GLFW错误功能和加载。
答案 0 :(得分:0)
设置glfwSwapInterval(0);取下框架盖。