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Fixed accuracy test on Retina displays.
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parent
a1641cdec9
commit
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@ -35,7 +35,6 @@
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#include <stdlib.h>
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static double cursor_x = 0.0, cursor_y = 0.0;
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static int window_width = 640, window_height = 480;
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static int swap_interval = 1;
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static void set_swap_interval(GLFWwindow* window, int interval)
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@ -55,18 +54,6 @@ static void error_callback(int error, const char* description)
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fprintf(stderr, "Error: %s\n", description);
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}
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static void framebuffer_size_callback(GLFWwindow* window, int width, int height)
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{
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window_width = width;
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window_height = height;
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glViewport(0, 0, window_width, window_height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(0.f, window_width, 0.f, window_height, 0.f, 1.f);
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}
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static void cursor_position_callback(GLFWwindow* window, double x, double y)
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{
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cursor_x = x;
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@ -82,14 +69,13 @@ static void key_callback(GLFWwindow* window, int key, int scancode, int action,
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int main(void)
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{
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GLFWwindow* window;
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int width, height;
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glfwSetErrorCallback(error_callback);
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if (!glfwInit())
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exit(EXIT_FAILURE);
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window = glfwCreateWindow(window_width, window_height, "", NULL, NULL);
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window = glfwCreateWindow(640, 480, "", NULL, NULL);
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if (!window)
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{
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glfwTerminate();
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@ -97,25 +83,35 @@ int main(void)
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}
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glfwSetCursorPosCallback(window, cursor_position_callback);
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glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
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glfwSetKeyCallback(window, key_callback);
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glfwMakeContextCurrent(window);
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glfwGetFramebufferSize(window, &width, &height);
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framebuffer_size_callback(window, width, height);
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set_swap_interval(window, swap_interval);
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while (!glfwWindowShouldClose(window))
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{
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int wnd_width, wnd_height, fb_width, fb_height;
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float scale;
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glfwGetWindowSize(window, &wnd_width, &wnd_height);
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glfwGetFramebufferSize(window, &fb_width, &fb_height);
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scale = (float) fb_width / (float) wnd_width;
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glClear(GL_COLOR_BUFFER_BIT);
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glViewport(0, 0, fb_width, fb_height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(0.f, fb_width, 0.f, fb_height, 0.f, 1.f);
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glBegin(GL_LINES);
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glVertex2f(0.f, (GLfloat) (window_height - cursor_y));
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glVertex2f((GLfloat) window_width, (GLfloat) (window_height - cursor_y));
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glVertex2f((GLfloat) cursor_x, 0.f);
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glVertex2f((GLfloat) cursor_x, (GLfloat) window_height);
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glVertex2f(0.f, (GLfloat) (fb_height - cursor_y * scale));
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glVertex2f((GLfloat) fb_width, (GLfloat) (fb_height - cursor_y * scale));
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glVertex2f((GLfloat) cursor_x * scale, 0.f);
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glVertex2f((GLfloat) cursor_x * scale, (GLfloat) fb_height);
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glEnd();
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glfwSwapBuffers(window);
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