2010-09-07 19:34:51 +04:00
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//========================================================================
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2010-11-17 18:39:55 +03:00
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// Fullscreen anti-aliasing test
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2010-09-07 19:34:51 +04:00
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// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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//
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// This test renders two high contrast, slowly rotating quads, one aliased
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// and one (hopefully) anti-aliased, thus allowing for visual verification
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// of whether FSAA is indeed enabled
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//
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//========================================================================
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2012-06-06 01:55:10 +04:00
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#define GLFW_INCLUDE_GLU
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2010-09-10 15:16:03 +04:00
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#include <GL/glfw3.h>
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2010-11-17 18:06:15 +03:00
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#include <GL/glext.h>
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2010-09-07 19:34:51 +04:00
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#include <stdio.h>
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#include <stdlib.h>
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2010-11-17 18:26:32 +03:00
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#include "getopt.h"
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2012-12-30 04:42:14 +04:00
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static void error_callback(int error, const char* description)
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{
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fprintf(stderr, "Error: %s\n", description);
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}
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2013-01-06 00:13:28 +04:00
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static void window_size_callback(GLFWwindow* window, int width, int height)
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2010-09-07 19:34:51 +04:00
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{
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glViewport(0, 0, width, height);
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}
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2013-01-06 00:13:28 +04:00
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static void key_callback(GLFWwindow* window, int key, int action)
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2011-03-05 15:17:39 +03:00
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{
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if (action != GLFW_PRESS)
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return;
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switch (key)
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{
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case GLFW_KEY_SPACE:
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glfwSetTime(0.0);
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break;
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}
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}
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2010-11-17 18:26:32 +03:00
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static void usage(void)
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2010-09-07 19:34:51 +04:00
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{
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2010-11-17 18:26:32 +03:00
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printf("Usage: fsaa [-h] [-s SAMPLES]\n");
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}
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int main(int argc, char** argv)
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{
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int ch, samples = 4;
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2013-01-06 00:13:28 +04:00
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GLFWwindow* window;
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2010-09-09 21:18:18 +04:00
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2010-11-17 18:26:32 +03:00
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while ((ch = getopt(argc, argv, "hs:")) != -1)
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{
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switch (ch)
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{
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case 'h':
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usage();
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exit(EXIT_SUCCESS);
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case 's':
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samples = atoi(optarg);
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break;
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default:
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usage();
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exit(EXIT_FAILURE);
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}
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}
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2012-12-30 04:42:14 +04:00
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glfwSetErrorCallback(error_callback);
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2010-09-07 19:34:51 +04:00
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if (!glfwInit())
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exit(EXIT_FAILURE);
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2010-11-17 18:26:32 +03:00
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if (samples)
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printf("Requesting FSAA with %i samples\n", samples);
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else
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printf("Requesting that FSAA not be available\n");
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2012-12-31 22:45:13 +04:00
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glfwWindowHint(GLFW_SAMPLES, samples);
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2010-09-07 19:34:51 +04:00
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2012-09-27 23:37:36 +04:00
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window = glfwCreateWindow(800, 400, "Aliasing Detector", NULL, NULL);
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2010-09-09 21:18:18 +04:00
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if (!window)
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2010-09-07 19:34:51 +04:00
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{
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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2012-10-28 16:45:11 +04:00
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glfwSetKeyCallback(window, key_callback);
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glfwSetWindowSizeCallback(window, window_size_callback);
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2012-08-10 17:29:45 +04:00
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glfwMakeContextCurrent(window);
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glfwSwapInterval(1);
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2011-03-05 15:23:06 +03:00
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if (!glfwExtensionSupported("GL_ARB_multisample"))
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{
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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2012-08-10 15:03:11 +04:00
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glGetIntegerv(GL_SAMPLES_ARB, &samples);
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2010-09-07 19:34:51 +04:00
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if (samples)
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2010-11-17 18:26:32 +03:00
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printf("Context reports FSAA is available with %i samples\n", samples);
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2010-09-07 19:34:51 +04:00
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else
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2010-11-17 18:26:32 +03:00
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printf("Context reports FSAA is unavailable\n");
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2010-09-07 19:34:51 +04:00
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glMatrixMode(GL_PROJECTION);
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2010-11-17 18:14:27 +03:00
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gluOrtho2D(0.f, 1.f, 0.f, 0.5f);
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glMatrixMode(GL_MODELVIEW);
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2010-09-07 19:34:51 +04:00
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2013-03-01 16:45:12 +04:00
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while (!glfwWindowShouldClose(window))
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2010-09-07 19:34:51 +04:00
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{
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GLfloat time = (GLfloat) glfwGetTime();
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glClear(GL_COLOR_BUFFER_BIT);
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glLoadIdentity();
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2010-11-17 18:14:27 +03:00
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glTranslatef(0.25f, 0.25f, 0.f);
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2010-09-07 19:34:51 +04:00
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glRotatef(time, 0.f, 0.f, 1.f);
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2010-11-17 18:14:27 +03:00
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glDisable(GL_MULTISAMPLE_ARB);
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glRectf(-0.15f, -0.15f, 0.15f, 0.15f);
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2010-09-07 19:34:51 +04:00
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glLoadIdentity();
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2010-11-17 18:14:27 +03:00
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glTranslatef(0.75f, 0.25f, 0.f);
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2010-09-07 19:34:51 +04:00
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glRotatef(time, 0.f, 0.f, 1.f);
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2010-11-17 18:14:27 +03:00
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glEnable(GL_MULTISAMPLE_ARB);
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glRectf(-0.15f, -0.15f, 0.15f, 0.15f);
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2010-09-07 19:34:51 +04:00
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2012-08-06 20:13:37 +04:00
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glfwSwapBuffers(window);
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2010-09-09 21:18:18 +04:00
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glfwPollEvents();
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2010-09-07 19:34:51 +04:00
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}
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glfwTerminate();
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exit(EXIT_SUCCESS);
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}
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