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@ -30,33 +30,58 @@ |
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//========================================================================
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#include <GL/glfw3.h> |
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#include <GL/glext.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#ifndef GL_ARB_multisample |
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#define GL_MULTISAMPLE_ARB 0x809D |
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#endif |
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#include "getopt.h" |
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static void window_size_callback(GLFWwindow window, int width, int height) |
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{ |
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glViewport(0, 0, width, height); |
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} |
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int main(void) |
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static void usage(void) |
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{ |
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int samples; |
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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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GLFWwindow window; |
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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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if (!glfwInit()) |
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{ |
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fprintf(stderr, "Failed to initialize GLFW: %s\n", glfwErrorString(glfwGetError())); |
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exit(EXIT_FAILURE); |
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} |
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glfwOpenWindowHint(GLFW_FSAA_SAMPLES, 4); |
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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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glfwOpenWindowHint(GLFW_FSAA_SAMPLES, samples); |
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window = glfwOpenWindow(400, 400, GLFW_WINDOWED, "Aliasing Detector", NULL); |
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window = glfwOpenWindow(800, 400, GLFW_WINDOWED, "Aliasing Detector", NULL); |
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if (!window) |
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{ |
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glfwTerminate(); |
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@ -70,12 +95,13 @@ int main(void) |
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samples = glfwGetWindowParam(window, GLFW_FSAA_SAMPLES); |
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if (samples) |
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printf("Context reports FSAA is supported with %i samples\n", samples); |
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printf("Context reports FSAA is available with %i samples\n", samples); |
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else |
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printf("Context reports FSAA is unsupported\n"); |
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printf("Context reports FSAA is unavailable\n"); |
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glMatrixMode(GL_PROJECTION); |
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gluOrtho2D(0.f, 1.f, 0.f, 1.f); |
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gluOrtho2D(0.f, 1.f, 0.f, 0.5f); |
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glMatrixMode(GL_MODELVIEW); |
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while (glfwIsWindow(window)) |
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{ |
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@ -83,21 +109,21 @@ int main(void) |
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glClear(GL_COLOR_BUFFER_BIT); |
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glColor3f(1.f, 1.f, 1.f); |
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glLoadIdentity(); |
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glTranslatef(0.5f, 0.f, 0.f); |
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glTranslatef(0.25f, 0.25f, 0.f); |
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glRotatef(time, 0.f, 0.f, 1.f); |
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glEnable(GL_MULTISAMPLE_ARB); |
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glColor3f(1.f, 1.f, 1.f); |
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glRectf(-0.25f, -0.25f, 0.25f, 0.25f); |
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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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glLoadIdentity(); |
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glTranslatef(-0.5f, 0.f, 0.f); |
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glTranslatef(0.75f, 0.25f, 0.f); |
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glRotatef(time, 0.f, 0.f, 1.f); |
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glDisable(GL_MULTISAMPLE_ARB); |
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glColor3f(1.f, 1.f, 1.f); |
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glRectf(-0.25f, -0.25f, 0.25f, 0.25f); |
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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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glfwSwapBuffers(); |
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glfwPollEvents(); |
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