Open source Star Ruler 2 source code!

2018-07-17 14:15:37 +02:00
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+//========================================================================
+// Default window/context 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 creates a windowed mode window with all window hints set to
+// default values and then reports the actual attributes of the created
+// window and context
+//
+//========================================================================
+
+#include <GLFW/glfw3.h>
+#include <GL/glext.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct
+{
+    int attrib;
+    const char* ext;
+    const char* name;
+} AttribGL;
+
+typedef struct
+{
+    int attrib;
+    const char* name;
+} AttribGLFW;
+
+static AttribGL gl_attribs[] =
+{
+    { GL_RED_BITS, NULL, "red bits" },
+    { GL_GREEN_BITS, NULL, "green bits" },
+    { GL_BLUE_BITS, NULL, "blue bits" },
+    { GL_ALPHA_BITS, NULL, "alpha bits" },
+    { GL_DEPTH_BITS, NULL, "depth bits" },
+    { GL_STENCIL_BITS, NULL, "stencil bits" },
+    { GL_STEREO, NULL, "stereo" },
+    { GL_SAMPLES_ARB, "GL_ARB_multisample", "FSAA samples" },
+    { 0, NULL, NULL }
+};
+
+static AttribGLFW glfw_attribs[] =
+{
+    { GLFW_CONTEXT_VERSION_MAJOR, "Context version major" },
+    { GLFW_CONTEXT_VERSION_MINOR, "Context version minor" },
+    { GLFW_OPENGL_FORWARD_COMPAT, "OpenGL forward compatible" },
+    { GLFW_OPENGL_DEBUG_CONTEXT, "OpenGL debug context" },
+    { GLFW_OPENGL_PROFILE, "OpenGL profile" },
+    { 0, NULL }
+};
+
+static void error_callback(int error, const char* description)
+{
+    fprintf(stderr, "Error: %s\n", description);
+}
+
+int main(void)
+{
+    int i, width, height;
+    GLFWwindow* window;
+
+    glfwSetErrorCallback(error_callback);
+
+    if (!glfwInit())
+        exit(EXIT_FAILURE);
+
+    glfwWindowHint(GLFW_VISIBLE, GL_FALSE);
+
+    window = glfwCreateWindow(640, 480, "Defaults", NULL, NULL);
+    if (!window)
+    {
+        glfwTerminate();
+        exit(EXIT_FAILURE);
+    }
+
+    glfwMakeContextCurrent(window);
+    glfwGetFramebufferSize(window, &width, &height);
+
+    printf("framebuffer size: %ix%i\n", width, height);
+
+    for (i = 0;  glfw_attribs[i].name;   i++)
+    {
+        printf("%s: %i\n",
+               glfw_attribs[i].name,
+               glfwGetWindowAttrib(window, glfw_attribs[i].attrib));
+    }
+
+    for (i = 0;  gl_attribs[i].name;   i++)
+    {
+        GLint value = 0;
+
+        if (gl_attribs[i].ext)
+        {
+            if (!glfwExtensionSupported(gl_attribs[i].ext))
+                continue;
+        }
+
+        glGetIntegerv(gl_attribs[i].attrib, &value);
+
+        printf("%s: %i\n", gl_attribs[i].name, value);
+    }
+
+    glfwDestroyWindow(window);
+    window = NULL;
+
+    glfwTerminate();
+    exit(EXIT_SUCCESS);
+}
+