目前,如果我的窗口足够小,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)运行在2000fps左右。如何将其限制为显示器刷新率(甚至仅为60fps)?
我当前的代码如下所示:
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;
}
正如您所看到的,它与ImGui示例中给出的GLFW和OpenGL 3的原始示例代码没有什么不同(几乎完全不同),只是我使用glfwWindowHint(GLFW_REFRESH_RATE, 60)
限制刷新率的尝试失败了,我了解到它只影响全屏模式下的窗口。此外,我还认为glfwSwapInterval(1)
可能也会将刷新率限制为显示器的刷新率,但它似乎也没有做到这一点。任何帮助都将不胜感激。
编辑: GLFW错误函数和加载。
发布于 2020-10-30 03:54:22
设置glfwSwapInterval(0);将删除framecap。
https://stackoverflow.com/questions/54312897
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