110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
//========================================================================
|
|
// Fullscreen multisampling anti-aliasing 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 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
|
|
//
|
|
//========================================================================
|
|
|
|
#include <GL/glfw3.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#ifndef GL_ARB_multisample
|
|
#define GL_MULTISAMPLE_ARB 0x809D
|
|
#endif
|
|
|
|
static void window_size_callback(GLFWwindow window, int width, int height)
|
|
{
|
|
glViewport(0, 0, width, height);
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
int samples;
|
|
GLFWwindow window;
|
|
|
|
if (!glfwInit())
|
|
{
|
|
fprintf(stderr, "Failed to initialize GLFW: %s\n", glfwErrorString(glfwGetError()));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
glfwOpenWindowHint(GLFW_FSAA_SAMPLES, 4);
|
|
|
|
window = glfwOpenWindow(400, 400, GLFW_WINDOWED, "Aliasing Detector");
|
|
if (!window)
|
|
{
|
|
glfwTerminate();
|
|
|
|
fprintf(stderr, "Failed to open GLFW window: %s\n", glfwErrorString(glfwGetError()));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
glfwSetWindowSizeCallback(window, window_size_callback);
|
|
glfwSwapInterval(1);
|
|
|
|
samples = glfwGetWindowParam(window, GLFW_FSAA_SAMPLES);
|
|
if (samples)
|
|
printf("Context reports FSAA is supported with %i samples\n", samples);
|
|
else
|
|
printf("Context reports FSAA is unsupported\n");
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
gluOrtho2D(0.f, 1.f, 0.f, 1.f);
|
|
|
|
while (glfwIsWindow(window))
|
|
{
|
|
GLfloat time = (GLfloat) glfwGetTime();
|
|
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
glLoadIdentity();
|
|
glTranslatef(0.5f, 0.f, 0.f);
|
|
glRotatef(time, 0.f, 0.f, 1.f);
|
|
|
|
glEnable(GL_MULTISAMPLE_ARB);
|
|
glColor3f(1.f, 1.f, 1.f);
|
|
glRectf(-0.25f, -0.25f, 0.25f, 0.25f);
|
|
|
|
glLoadIdentity();
|
|
glTranslatef(-0.5f, 0.f, 0.f);
|
|
glRotatef(time, 0.f, 0.f, 1.f);
|
|
|
|
glDisable(GL_MULTISAMPLE_ARB);
|
|
glColor3f(1.f, 1.f, 1.f);
|
|
glRectf(-0.25f, -0.25f, 0.25f, 0.25f);
|
|
|
|
glfwSwapBuffers();
|
|
glfwPollEvents();
|
|
}
|
|
|
|
glfwTerminate();
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|