blah.c

float coords[16]=
    {
     (float)rect.x,(float)rect.y,u1,v1,
     (float)rect.x+rect.w,(float)rect.y,u2,v1,
     (float)rect.x+rect.w,(float)rect.y+rect.h,u2,v2,
     (float)rect.x,(float)rect.y+rect.h,u1,v2
    };
    
    glVertexPointer(2,GL_FLOAT,sizeof(float)*4,(void *)&coords[0]);
    glTexCoordPointer(2,GL_FLOAT,sizeof(float)*4,(void *)&coords[2]);
    
    glDrawArrays(GL_QUADS,0,4);