Attachment 40160 Details for Bug 31506 – Simple glut program which produces the error

Simple glut program which produces the error

shadertest.c (text/x-csrc), 3.92 KB, created by Tamas Kemenczy on 2010-11-09 10:09:14 UTC

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Filename:

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Creator: Tamas Kemenczy

Created: 2010-11-09 10:09:14 UTC

Size: 3.92 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#ifdef __APPLE__
>#include <GLUT/glut.h>
>#else
>#include <GL/glut.h>
>#endif
>
>unsigned int texture_id;
>unsigned int shader_program_id;
>unsigned int vertex_shader_id;
>unsigned int fragment_shader_id;
>unsigned int my_texture_location;
>
>char image[256 * 256 * 4];
>char shader_log_text[1024];
>int shader_log_text_length;
>
>const char *vertex_shader_source = {
>  "uniform sampler2D my_texture;"
>  "void main (void)"
>  "{"
>  "  vec4 temp = texture2D (my_texture, vec2 (0.5, 0.5));"
>  "  vec4 new_vertex = vec4 (gl_Vertex);"
>  "  new_vertex.x = new_vertex.x * temp.x;"
>  "  gl_Position = gl_ModelViewProjectionMatrix * new_vertex;"
>  "}"
>};
>
>const char *fragment_shader_source = {
>  "uniform sampler2D my_texture;"
>  "void main (void)"
>  "{"
>  "  gl_FragColor = vec4 (1.0, 1.0, 1.0, 1.0);"
>  "}"
>};
>
>void
>shader_log (void)
>{
>  glGetShaderInfoLog (
>    vertex_shader_id, 1024,
>    &shader_log_text_length, shader_log_text);
>  printf ("%s", shader_log_text);
>  glGetShaderInfoLog (
>    fragment_shader_id, 1024,
>    &shader_log_text_length, shader_log_text);
>  printf ("%s", shader_log_text);
>  glGetProgramInfoLog (
>    shader_program_id, 1024,
>    &shader_log_text_length, shader_log_text);
>  printf ("%s", shader_log_text);
>}
>
>void
>shader_init (void)
>{
>  int i;
>  char *pixel;
>
>  pixel = image;
>  for (i = 0; i < 256 * 256; i++)
>    {
>      *pixel = 127; pixel++;
>      *pixel = 127; pixel++;
>      *pixel = 127; pixel++;
>      *pixel = 255; pixel++;
>    }
>
>  glGenTextures (1, &texture_id);
>  glBindTexture (GL_TEXTURE_2D, texture_id);
>  glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_BGRA, GL_UNSIGNED_BYTE, image);
>  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
>  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
>  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
>  glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
>  glBindTexture (GL_TEXTURE_2D, 0);
>
>  shader_program_id = glCreateProgram ();
>  vertex_shader_id = glCreateShader (GL_VERTEX_SHADER);
>  fragment_shader_id = glCreateShader (GL_FRAGMENT_SHADER);
>
>  glShaderSource (vertex_shader_id, 1, &vertex_shader_source, 0);
>  glShaderSource (fragment_shader_id, 1, &fragment_shader_source, 0);
>  glCompileShader (vertex_shader_id);
>  glCompileShader (fragment_shader_id);
>  glAttachShader (shader_program_id, vertex_shader_id);
>  glAttachShader (shader_program_id, fragment_shader_id);
>  glLinkProgram (shader_program_id);
>
>  shader_log ();
>}
>
>void
>shader_exit (void)
>{
>  glDeleteTextures (1, &texture_id);
>  glDeleteShader (vertex_shader_id);
>  glDeleteShader (fragment_shader_id);
>  glDeleteProgram (shader_program_id);
>}
>
>void
>shader_tick (int value)
>{
>  glutTimerFunc (16, shader_tick, 0);
>  /* glutPostRedisplay (); */
>}
>
>void
>shader_draw (void)
>{
>  glUseProgram (shader_program_id);
>  my_texture_location = glGetUniformLocation (shader_program_id, "my_texture");
>
>  glActiveTexture (GL_TEXTURE0);
>  glBindTexture (GL_TEXTURE_2D, texture_id);
>  glUniform1i (my_texture_location, 0);
>
>  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>  glMatrixMode (GL_PROJECTION);
>  glLoadIdentity ();
>  glOrtho (-1, 1, -1, 1, -1, 1);
>  glViewport (0, 0, 256, 256);
>  glMatrixMode (GL_MODELVIEW);
>  glLoadIdentity ();
>  glBegin (GL_QUADS);
>  glTexCoord2f (0.0, 0.0);
>  glVertex3f (-0.5, -0.5, 0);
>  glTexCoord2f (1.0, 0.0);
>  glVertex3f (0.5, -0.5, 0);
>  glTexCoord2f (1.0, 1.0);
>  glVertex3f (0.5, 0.5, 0);
>  glTexCoord2f (0.0, 1.0);
>  glVertex3f (-0.5, 0.5, 0);
>  glEnd ();
>  glFlush();
>  glutSwapBuffers ();
>
>  glBindTexture (GL_TEXTURE_2D, 0);
>  glUseProgram (0);
>}
>
>int
>main (int argc, char **argv)
>{
>  glutInit (&argc, argv);
>  glutInitWindowPosition (-1, -1);
>  glutInitWindowSize (256, 256);
>  glutInitDisplayMode (GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
>  glutCreateWindow ("shader");
>  glutTimerFunc (16, shader_tick, 0);
>  glutDisplayFunc (shader_draw);
>  atexit (shader_exit);
>  shader_init ();
>  glutMainLoop ();
>
>  return 0;
>}

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Attachments on bug 31506: 40160

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