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https://github.com/glfw/glfw.git
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Improved tearing test.
Added support for arbitrary swap intervals, including negative ones if (GLX|WGL)_EXT_swap_control_tear is available.
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parent
8d4ba0aa83
commit
8503d53018
@ -36,6 +36,7 @@
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#include "getopt.h"
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static GLboolean swap_tear;
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static int swap_interval;
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static double frame_rate;
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@ -51,8 +52,10 @@ static void update_window_title(GLFWwindow* window)
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{
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char title[256];
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sprintf(title, "Tearing detector (interval %i, %0.1f Hz)",
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swap_interval, frame_rate);
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sprintf(title, "Tearing detector (interval %i%s, %0.1f Hz)",
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swap_interval,
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(swap_tear && swap_interval < 0) ? " (swap tear)" : "",
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frame_rate);
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glfwSetWindowTitle(window, title);
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}
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@ -81,9 +84,28 @@ static void key_callback(GLFWwindow* window, int key, int scancode, int action,
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switch (key)
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{
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case GLFW_KEY_SPACE:
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set_swap_interval(window, 1 - swap_interval);
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case GLFW_KEY_UP:
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{
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if (swap_interval + 1 > swap_interval)
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set_swap_interval(window, swap_interval + 1);
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break;
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}
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case GLFW_KEY_DOWN:
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{
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if (swap_tear)
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{
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if (swap_interval - 1 < swap_interval)
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set_swap_interval(window, swap_interval - 1);
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}
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else
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{
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if (swap_interval - 1 >= 0)
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set_swap_interval(window, swap_interval - 1);
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}
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break;
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}
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case GLFW_KEY_ESCAPE:
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glfwSetWindowShouldClose(window, 1);
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break;
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@ -152,6 +174,8 @@ int main(int argc, char** argv)
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last_time = glfwGetTime();
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frame_rate = 0.0;
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swap_tear = (glfwExtensionSupported("WGL_EXT_swap_control_tear") ||
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glfwExtensionSupported("GLX_EXT_swap_control_tear"));
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glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
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glfwSetKeyCallback(window, key_callback);
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