Attachment 133661 Details for Bug 102038 – simple-msaa.c

simple-msaa.c

msaa.c (text/x-csrc), 2.04 KB, created by Bruce Cherniak on 2017-08-21 23:17:39 UTC

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Filename:

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Creator: Bruce Cherniak

Created: 2017-08-21 23:17:39 UTC

Size: 2.04 KB

patch

obsolete

>#include <stdio.h>
>#include <GL/gl.h>
>#include <GL/glut.h>
>#if defined(FREEGLUT)
>#include <GL/freeglut_ext.h>
>#endif
>
>unsigned char g_useColor = 0;
>unsigned char g_useMSAA = 1;
>
>void
>reshape(int w, int h)
>{
>  glViewport(0, 0, w, h);
>  glMatrixMode(GL_PROJECTION);
>  glLoadIdentity();
>  glOrtho(0, w, 0, h, -1, 1);
>  glScalef(1, -1, 1);
>  glTranslatef(0, -h, 0);
>}
>
>void
>DrawScene(void)
>{
>  if (g_useMSAA)
>     glEnable(GL_MULTISAMPLE_ARB);
>  else
>     glDisable(GL_MULTISAMPLE_ARB);
>
>  glClearColor(0.0, 0.0, 0.0, 0.0);
>  glClear(GL_COLOR_BUFFER_BIT);
>
>  if (g_useMSAA)
>     glColor3f(1.0, 0.0, 0.0);
>  else
>     glColor3f(0.0, 0.0, 1.0);
>
>  glBegin(GL_TRIANGLES);
>  if (g_useColor)
>    glColor3f(0.0, 0.0, 1.0);
>  glVertex2i(0, 10);
>  if (g_useColor)
>    glColor3f(0.0, 1.0, 0.0);
>  glVertex2i(210, 200);
>  if (g_useColor)
>    glColor3f(1.0, 0.0, 0.0);
>  glVertex2i(20, 220);
>  glEnd();
>
>  glEnable(GL_MULTISAMPLE_ARB);
>  glColor3f(0.0, 1.0, 0.0);
>  glBegin(GL_TRIANGLES);
>  if (g_useColor)
>    glColor3f(1.0, 0.0, 0.0);
>  glVertex2i(150, 50);
>  if (g_useColor)
>    glColor3f(0.0, 1.0, 0.0);
>  glVertex2i(110, 250);
>  if (g_useColor)
>    glColor3f(0.0, 0.0, 1.0);
>  glVertex2i(250, 120);
>  glEnd();
>  glutSwapBuffers();
>}
>
>void
>Key(unsigned char key, int x, int y)
>{
>
>  switch (key) {
>  case 27:
>    exit(0);
>    break;
>  case 'c':
>	g_useColor ^= 1;
>	glutPostRedisplay();
>   break;
>  case 'm':
>	g_useMSAA ^= 1;
>	glutPostRedisplay();
>   break;
>  case ' ':
>	glutPostRedisplay();
>    break;
>  }
>}
>
>int
>main(int argc, char **argv)
>{
>  uint32_t samples = 4;
>
>  glutInit(&argc, argv);
>
>  if (argc > 1)
>    samples = atoi(argv[1]);
>  samples = samples > 16 ? 16 : samples;
>
>  GLenum type;
>  type = GLUT_RGB;
>  type |= GLUT_DOUBLE;
>  type |= GLUT_MULTISAMPLE;
>#if defined(FREEGLUT)
>  glutSetOption(GLUT_MULTISAMPLE, samples);
>  fprintf(stderr,"glut num_samples: %d\n", glutGet(GLUT_MULTISAMPLE));
>#endif
>  glutInitDisplayMode(type);
>  glutCreateWindow("single msaa triangle");
>  glutReshapeFunc(reshape);
>  glutKeyboardFunc(Key);
>  glutDisplayFunc(DrawScene);
>  glutMainLoop();
>  return 0;
>}

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Attachments on bug 102038: 133247 | 133654 | 133661 | 133687 | 133726 | 133732

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