Attachment 27231 Details for Bug 22540 – Test case : if it segfault, then it failed!

Test case : if it segfault, then it failed!

vbo.c (text/plain), 5.64 KB, created by David Henry on 2009-06-29 12:32:44 UTC

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Creator: David Henry

Created: 2009-06-29 12:32:44 UTC

Size: 5.64 KB

patch

obsolete

>/*
> * gcc -Wall -ansi -lGL -lGLU -lGLEW -lglut vbo.c -o vbo
> */
>
>#include <GL/glew.h>
>#include <GL/glut.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>
>struct VN_t
>{
>  GLfloat v[3]; /* position */
>  GLfloat n[3]; /* normal */
>};
>
>static struct VN_t cube[24] = {
>  { { 0.0, 0.0, 0.0 }, { 0.0, 0.0, -1.0 } },
>  { { 0.0, 1.0, 0.0 }, { 0.0, 0.0, -1.0 } },
>  { { 1.0, 1.0, 0.0 }, { 0.0, 0.0, -1.0 } },
>  { { 1.0, 0.0, 0.0 }, { 0.0, 0.0, -1.0 } },
>
>  { { 0.0, 0.0, 1.0 }, { 0.0, 0.0, 1.0 } },
>  { { 1.0, 0.0, 1.0 }, { 0.0, 0.0, 1.0 } },
>  { { 1.0, 1.0, 1.0 }, { 0.0, 0.0, 1.0 } },
>  { { 0.0, 1.0, 1.0 }, { 0.0, 0.0, 1.0 } },
>
>  { { 1.0, 0.0, 1.0 }, { 1.0, 0.0, 0.0 } },
>  { { 1.0, 0.0, 0.0 }, { 1.0, 0.0, 0.0 } },
>  { { 1.0, 1.0, 0.0 }, { 1.0, 0.0, 0.0 } },
>  { { 1.0, 1.0, 1.0 }, { 1.0, 0.0, 0.0 } },
>
>  { { 0.0, 0.0, 1.0 }, { -1.0, 0.0, 0.0 } },
>  { { 0.0, 1.0, 1.0 }, { -1.0, 0.0, 0.0 } },
>  { { 0.0, 1.0, 0.0 }, { -1.0, 0.0, 0.0 } },
>  { { 0.0, 0.0, 0.0 }, { -1.0, 0.0, 0.0 } },
>
>  { { 0.0, 1.0, 1.0 }, { 0.0, 1.0, 0.0 } },
>  { { 1.0, 1.0, 1.0 }, { 0.0, 1.0, 0.0 } },
>  { { 1.0, 1.0, 0.0 }, { 0.0, 1.0, 0.0 } },
>  { { 0.0, 1.0, 0.0 }, { 0.0, 1.0, 0.0 } },
>
>  { { 0.0, 0.0, 1.0 }, { 0.0, -1.0, 0.0 } },
>  { { 0.0, 0.0, 0.0 }, { 0.0, -1.0, 0.0 } },
>  { { 1.0, 0.0, 0.0 }, { 0.0, -1.0, 0.0 } },
>  { { 1.0, 0.0, 1.0 }, { 0.0, -1.0, 0.0 } },
>
>};
>
>static GLushort indices[24] = {
>  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
>  13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23
>};
>
>GLuint vboId = 0;
>GLuint iboId = 0;
>
>static void
>init ()
>{
>  GLenum err = glewInit ();
>  if (GLEW_OK != err)
>    {
>      /* Problem: glewInit failed, something is seriously wrong. */
>      fprintf (stderr, "Error: %s\n", glewGetErrorString (err));
>      exit (EXIT_FAILURE);
>    }
>
>  if (!GLEW_ARB_vertex_buffer_object)
>    {
>      fprintf (stderr, "Error: missing ARB_vertex_buffer_object extension\n");
>      exit (EXIT_FAILURE);
>    }
>
>  /* OpenGL initialization */
>  glClearColor (0.1f, 0.1f, 0.1f, 0.0f);
>  glShadeModel (GL_SMOOTH);
>
>  glEnable (GL_CULL_FACE);
>  glEnable (GL_DEPTH_TEST);
>  glEnable (GL_LIGHTING);
>  glEnable (GL_LIGHT0);
>
>  /* Here we create the VBOs. The index buffer object is made static,
>     because we just want to test the mapping of the vertex buffer
>     object. */
>  glGenBuffersARB (1, &vboId);
>  glGenBuffersARB (1, &iboId);
>
>  /* Allocate and copy data for index buffer object */
>  glBindBufferARB (GL_ELEMENT_ARRAY_BUFFER, iboId);
>  glBufferDataARB (GL_ELEMENT_ARRAY_BUFFER, 24 * sizeof (GLushort), &indices, GL_STATIC_DRAW);
>
>  /* Allocate memory for vertex buffer object */
>  glBindBufferARB (GL_ARRAY_BUFFER, vboId);
>  glBufferDataARB (GL_ARRAY_BUFFER, 24 * sizeof (struct VN_t), NULL, GL_STREAM_DRAW_ARB);
>
>  glBindBufferARB (GL_ELEMENT_ARRAY_BUFFER, 0);
>  glBindBufferARB (GL_ARRAY_BUFFER, 0);
>}
>
>static void
>reshape (int w, int h)
>{
>  if (h == 0)
>    h = 1;
>
>  glViewport (0, 0, (GLsizei)w, (GLsizei)h);
>
>  glMatrixMode (GL_PROJECTION);
>  glLoadIdentity ();
>  gluPerspective (45.0, (GLfloat)w/(GLfloat)h, 0.1, 1000.0);
>
>  glMatrixMode (GL_MODELVIEW);
>  glLoadIdentity ();
>
>  glutPostRedisplay ();
>}
>
>static void
>printMappingState (const char *s)
>{
>  GLint is_mapped = 0;
>  glBindBufferARB (GL_ARRAY_BUFFER_ARB, vboId);
>  glGetBufferParameterivARB (GL_ARRAY_BUFFER_ARB, GL_BUFFER_MAPPED_ARB, &is_mapped);
>  printf ("%s, buffer is%s mapped\n", s, is_mapped ? "" : " not");
>}
>
>static void
>display ()
>{
>  GLenum err;
>  struct VN_t *v;
>  static float angle = 25.0;
>  static int frame = 1;
>
>  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>
>  /* Camera setup */
>  glLoadIdentity ();
>  glTranslated (0.0f, 0.0f, -3.0f);
>  glRotated (35.0f, 1.0f, 0.0f, 0.0f);
>  glRotated (angle, 0.0f, 1.0f, 0.0f);
>  glTranslatef (-0.5f, -0.5f, -0.5f);
>
>  angle += 0.2;
>
>  glBindBufferARB (GL_ELEMENT_ARRAY_BUFFER, iboId);
>  glBindBufferARB (GL_ARRAY_BUFFER, vboId);
>
>  printMappingState ("Before copying data");
>
>  if (0)
>    {
>      /* This code path works */
>      glBufferDataARB (GL_ARRAY_BUFFER, 24 * sizeof (struct VN_t), &cube, GL_STREAM_DRAW_ARB);
>    }
>  else
>    {
>      /* This code path doesn't work, unless if we uncomment the
>	 following line: */
>      /*glBufferDataARB (GL_ARRAY_BUFFER, 24 * sizeof (struct vertex), NULL, GL_STREAM_DRAW_ARB);*/
>
>      printf ("Mapping frame %i\n", frame);
>
>      /* Map the buffer, copy data into it, and unmap it */
>      v = (struct VN_t *)glMapBufferARB (GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
>      memcpy (v, &cube, sizeof (cube));
>      glUnmapBufferARB (GL_ARRAY_BUFFER_ARB);
>    }
>
>  glEnableClientState (GL_VERTEX_ARRAY);
>  glEnableClientState (GL_NORMAL_ARRAY);
>
>  printMappingState ("Before drawing");
>
>  glNormalPointer (GL_FLOAT, sizeof (struct VN_t), (char *)(sizeof (GLfloat) * 3));
>  glVertexPointer (3, GL_FLOAT, sizeof (struct VN_t), 0);
>
>  glDrawElements (GL_QUADS, 24, GL_UNSIGNED_SHORT, 0);
>
>  glBindBufferARB (GL_ELEMENT_ARRAY_BUFFER, 0);
>  glBindBufferARB (GL_ARRAY_BUFFER, 0);
>
>  glDisableClientState (GL_VERTEX_ARRAY);
>  glDisableClientState (GL_NORMAL_ARRAY);
>
>  printMappingState ("After drawing");
>
>  err = glGetError ();
>  if (err != GL_NO_ERROR)
>    fprintf (stderr, "OpenGL error: %s\n", gluErrorString (err));
>
>  printf ("Frame %i finished...\n----------\n", frame);
>  frame++;
>
>  glutSwapBuffers ();
>  glutPostRedisplay ();
>}
>
>static void
>keyPress (unsigned char key, int x, int y)
>{
>  /* Escape */
>  if (key == 27)
>    exit (0);
>
>  glutPostRedisplay ();
>}
>
>int
>main (int argc, char *argv[])
>{
>  glutInit (&argc, argv);
>
>  glutInitDisplayMode (GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
>  glutInitWindowSize (640, 480);
>  glutCreateWindow ("VBO demo");
>
>  init ();
>
>  glutReshapeFunc (reshape);
>  glutDisplayFunc (display);
>  glutKeyboardFunc (keyPress);
>
>  glutMainLoop ();
>
>  return 0;
>}

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Attachments on bug 22540: 27231 | 27232

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