#! /usr/bin/env python

#coding=utf-8

'''

Copy from freeglut_font.c and freeglut_font_data.c

 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.

 * Written by Pawel W. Olszta, <olszta@sourceforge.net>

 * Creation date: Thu Dec 16 1999

 * Modified by T.Q., <pasuka(at)foxmail(dot)com>, 25-10-2013

'''

from OpenGL import GL

from fontData import fgGetFontById

fontDict = {"GLUT_BITMAP_8_BY_13":1,

            "GLUT_BITMAP_9_BY_15":2,

            "GLUT_BITMAP_HELVETICA_10":3,

            "GLUT_BITMAP_HELVETICA_12":4,

            "GLUT_BITMAP_HELVETICA_18":5,

            "GLUT_BITMAP_TIMES_ROMAN_10":6,

            "GLUT_BITMAP_TIMES_ROMAN_24":7}

def BitmapCharacter(slt,cc):

    '''

    Draw a bitmap character

    '''

    if not cc:return -3

    if not 0<=ord(cc)<=255:return -1

    if not fontDict.has_key(slt): return -2

    GL.glPushClientAttrib(GL.GL_CLIENT_PIXEL_STORE_BIT)

    GL.glPixelStorei(GL.GL_UNPACK_SWAP_BYTES,GL.GL_FALSE)

    GL.glPixelStorei(GL.GL_UNPACK_LSB_FIRST,GL.GL_FALSE)

    GL.glPixelStorei(GL.GL_UNPACK_ROW_LENGTH,0)

    GL.glPixelStorei(GL.GL_UNPACK_SKIP_ROWS,0)

    GL.glPixelStorei(GL.GL_UNPACK_SKIP_PIXELS,0)

    GL.glPixelStorei(GL.GL_UNPACK_ALIGNMENT,1)

    font = fgGetFontById(fontDict[slt])

    face = font['Characters'][ord(cc)]

    GL.glBitmap(face[0], font['Height'], # The bitmap's width and height

        font['xorig'], font['yorig'], # The origin in the font glyph

        float(face[0]),0.0, #The raster advance -- inc. x,y

        face[1:]) # The packed bitmap data...

    GL.glPopClientAttrib()

    return 0

def BitmapString(slt,s):

    '''

    Draw a bitmap string

    '''

    if not s:return -3

    for k in s:

        if not 0<=ord(k)<=255:

            return -1

    if not fontDict.has_key(slt):return -2

    font = fgGetFontById(fontDict[slt])

    GL.glPushClientAttrib(GL.GL_CLIENT_PIXEL_STORE_BIT)

    GL.glPixelStorei(GL.GL_UNPACK_SWAP_BYTES,GL.GL_FALSE)

    GL.glPixelStorei(GL.GL_UNPACK_LSB_FIRST,GL.GL_FALSE)

    GL.glPixelStorei(GL.GL_UNPACK_ROW_LENGTH,0)

    GL.glPixelStorei(GL.GL_UNPACK_SKIP_ROWS,0)

    GL.glPixelStorei(GL.GL_UNPACK_SKIP_PIXELS,0)

    GL.glPixelStorei(GL.GL_UNPACK_ALIGNMENT,1)

    x = 0.0

    for k in s:

        face = font['Characters'][ord(k)]

        if k=='\n':

            '''

            Step through the string, drawing each character.

            A newline will simply translate the next character's insertion

            point back to the start of the line and down one line.

            '''

            GL.glBitmap(0,0,0.0,0.0,-x,-float(font['Height']),0)

            x = 0.0

        else:

            GL.glBitmap(face[0],font['Height'],font['xorig'],font['yorig'],float(face[0]),0.0,face[1:])

            x += float(face[0])

    GL.glPopClientAttrib()

    return 0