Open source Star Ruler 2 source code!

2018-07-17 14:15:37 +02:00
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+//========================================================================
+// Cursor input bug test
+// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would
+//    be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such, and must not
+//    be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source
+//    distribution.
+//
+//========================================================================
+//
+// This test came about as the result of bugs #1262764, #1726540 and
+// #1726592, all reported by the user peterpp, hence the name
+//
+// The utility of this test outside of these bugs is uncertain
+//
+//========================================================================
+
+#include <GLFW/glfw3.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+static GLboolean reopen = GL_FALSE;
+static double cursor_x;
+static double cursor_y;
+
+static void toggle_cursor(GLFWwindow* window)
+{
+    if (glfwGetInputMode(window, GLFW_CURSOR) == GLFW_CURSOR_DISABLED)
+    {
+        printf("Released cursor\n");
+        glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+    }
+    else
+    {
+        printf("Captured cursor\n");
+        glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+    }
+}
+
+static void error_callback(int error, const char* description)
+{
+    fprintf(stderr, "Error: %s\n", description);
+}
+
+static void cursor_position_callback(GLFWwindow* window, double x, double y)
+{
+    printf("Cursor moved to: %f %f (%f %f)\n", x, y, x - cursor_x, y - cursor_y);
+    cursor_x = x;
+    cursor_y = y;
+}
+
+static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+    switch (key)
+    {
+        case GLFW_KEY_SPACE:
+        {
+            if (action == GLFW_PRESS)
+                toggle_cursor(window);
+
+            break;
+        }
+
+        case GLFW_KEY_R:
+        {
+            if (action == GLFW_PRESS)
+                reopen = GL_TRUE;
+
+            break;
+        }
+    }
+}
+
+static void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+    glViewport(0, 0, width, height);
+}
+
+static GLFWwindow* open_window(void)
+{
+    GLFWwindow* window = glfwCreateWindow(640, 480, "Peter Detector", NULL, NULL);
+    if (!window)
+        return NULL;
+
+    glfwMakeContextCurrent(window);
+    glfwSwapInterval(1);
+
+    glfwGetCursorPos(window, &cursor_x, &cursor_y);
+    printf("Cursor position: %f %f\n", cursor_x, cursor_y);
+
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+    glfwSetCursorPosCallback(window, cursor_position_callback);
+    glfwSetKeyCallback(window, key_callback);
+
+    return window;
+}
+
+int main(void)
+{
+    GLFWwindow* window;
+
+    glfwSetErrorCallback(error_callback);
+
+    if (!glfwInit())
+        exit(EXIT_FAILURE);
+
+    window = open_window();
+    if (!window)
+    {
+        glfwTerminate();
+        exit(EXIT_FAILURE);
+    }
+
+    glClearColor(0.f, 0.f, 0.f, 0.f);
+
+    while (!glfwWindowShouldClose(window))
+    {
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        glfwSwapBuffers(window);
+        glfwWaitEvents();
+
+        if (reopen)
+        {
+            glfwDestroyWindow(window);
+            window = open_window();
+            if (!window)
+            {
+                glfwTerminate();
+                exit(EXIT_FAILURE);
+            }
+
+            reopen = GL_FALSE;
+        }
+    }
+
+    glfwTerminate();
+    exit(EXIT_SUCCESS);
+}
+