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objview: check GL version/extension

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This commit is contained in:
Brian Paul
2009-10-01 13:05:13 -06:00
parent ca1bda552d
commit 336994e54c
1 changed files with 29 additions and 1 deletions
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30
progs/objviewer/objview.c
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@@ -148,7 +148,7 @@ init_model(void)
glmFacetNormals(Model);
if (Model->numnormals == 0) {
GLfloat smoothing_angle = 90.0;
printf("Generating normals.");
printf("Generating normals.\n");
glmVertexNormals(Model, smoothing_angle);
}
@@ -432,6 +432,32 @@ Motion(int x, int y)
}
static void
DoFeatureChecks(void)
{
char *version = (char *) glGetString(GL_VERSION);
if (version[0] == '1') {
/* check for individual extensions */
if (!glutExtensionSupported("GL_ARB_texture_cube_map")) {
printf("Sorry, GL_ARB_texture_cube_map is required.\n");
exit(1);
}
if (!glutExtensionSupported("GL_ARB_vertex_shader")) {
printf("Sorry, GL_ARB_vertex_shader is required.\n");
exit(1);
}
if (!glutExtensionSupported("GL_ARB_fragment_shader")) {
printf("Sorry, GL_ARB_fragment_shader is required.\n");
exit(1);
}
if (!glutExtensionSupported("GL_ARB_vertex_buffer_object")) {
printf("Sorry, GL_ARB_vertex_buffer_object is required.\n");
exit(1);
}
}
}
int
main(int argc, char** argv)
{
@@ -452,6 +478,8 @@ main(int argc, char** argv)
glewInit();
DoFeatureChecks();
glutReshapeFunc(reshape);
glutDisplayFunc(display);
glutKeyboardFunc(keyboard);