glfw/tests/fsaa.c

159 строки
4.1 KiB
C
Исходник Обычный вид История

2010-09-07 19:34:51 +04:00
//========================================================================
2010-11-17 18:39:55 +03:00
// Fullscreen anti-aliasing test
2010-09-07 19:34:51 +04:00
// 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 renders two high contrast, slowly rotating quads, one aliased
// and one (hopefully) anti-aliased, thus allowing for visual verification
// of whether FSAA is indeed enabled
//
//========================================================================
#define GLFW_INCLUDE_GLU
#include <GL/glfw3.h>
#include <GL/glext.h>
2010-09-07 19:34:51 +04:00
#include <stdio.h>
#include <stdlib.h>
#include "getopt.h"
static void error_callback(int error, const char* description)
{
fprintf(stderr, "Error: %s\n", description);
}
static void window_size_callback(GLFWwindow* window, int width, int height)
2010-09-07 19:34:51 +04:00
{
glViewport(0, 0, width, height);
}
static void key_callback(GLFWwindow* window, int key, int action)
2011-03-05 15:17:39 +03:00
{
if (action != GLFW_PRESS)
return;
switch (key)
{
case GLFW_KEY_SPACE:
glfwSetTime(0.0);
break;
}
}
static void usage(void)
2010-09-07 19:34:51 +04:00
{
printf("Usage: fsaa [-h] [-s SAMPLES]\n");
}
int main(int argc, char** argv)
{
int ch, samples = 4;
GLFWwindow* window;
while ((ch = getopt(argc, argv, "hs:")) != -1)
{
switch (ch)
{
case 'h':
usage();
exit(EXIT_SUCCESS);
case 's':
samples = atoi(optarg);
break;
default:
usage();
exit(EXIT_FAILURE);
}
}
glfwSetErrorCallback(error_callback);
2010-09-07 19:34:51 +04:00
if (!glfwInit())
exit(EXIT_FAILURE);
if (samples)
printf("Requesting FSAA with %i samples\n", samples);
else
printf("Requesting that FSAA not be available\n");
glfwWindowHint(GLFW_SAMPLES, samples);
2010-09-07 19:34:51 +04:00
2012-09-27 23:37:36 +04:00
window = glfwCreateWindow(800, 400, "Aliasing Detector", NULL, NULL);
if (!window)
2010-09-07 19:34:51 +04:00
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwSetKeyCallback(window, key_callback);
glfwSetWindowSizeCallback(window, window_size_callback);
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
if (!glfwExtensionSupported("GL_ARB_multisample"))
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glGetIntegerv(GL_SAMPLES_ARB, &samples);
2010-09-07 19:34:51 +04:00
if (samples)
printf("Context reports FSAA is available with %i samples\n", samples);
2010-09-07 19:34:51 +04:00
else
printf("Context reports FSAA is unavailable\n");
2010-09-07 19:34:51 +04:00
glMatrixMode(GL_PROJECTION);
gluOrtho2D(0.f, 1.f, 0.f, 0.5f);
glMatrixMode(GL_MODELVIEW);
2010-09-07 19:34:51 +04:00
while (!glfwWindowShouldClose(window))
2010-09-07 19:34:51 +04:00
{
GLfloat time = (GLfloat) glfwGetTime();
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
glTranslatef(0.25f, 0.25f, 0.f);
2010-09-07 19:34:51 +04:00
glRotatef(time, 0.f, 0.f, 1.f);
glDisable(GL_MULTISAMPLE_ARB);
glRectf(-0.15f, -0.15f, 0.15f, 0.15f);
2010-09-07 19:34:51 +04:00
glLoadIdentity();
glTranslatef(0.75f, 0.25f, 0.f);
2010-09-07 19:34:51 +04:00
glRotatef(time, 0.f, 0.f, 1.f);
glEnable(GL_MULTISAMPLE_ARB);
glRectf(-0.15f, -0.15f, 0.15f, 0.15f);
2010-09-07 19:34:51 +04:00
glfwSwapBuffers(window);
glfwPollEvents();
2010-09-07 19:34:51 +04:00
}
glfwTerminate();
exit(EXIT_SUCCESS);
}