glDisable(GL_LIGHTING);

// Draws nothing
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, [0.0f, 500, 500, 500, 500, 0, 0, 0].ptr);
glTexCoordPointer(2, GL_FLOAT, 0, [0.0f, 0, 1, 0, 1, 1, 0, 1].ptr);                        
glDrawElements(GL_QUADS, 4, GL_UNSIGNED_INT, [0, 1, 2, 3].ptr);

// Works
glBegin(GL_QUADS);
glTexCoord2f(0, 0);
glVertex2f(0, 500);

glTexCoord2f(1, 0);
glVertex2f(500, 500);

glTexCoord2f(1, 1); 
glVertex2f(500, 0);

glTexCoord2f(0, 1);
glVertex2f(0, 0);
glEnd();