#!/usr/bin/python
# Id: starter_color.pl,v 1.1.2.2 2007/12/21 14:04:32 rjs Exp 
# Starter color:
# Demonstrate the basic use of supported color spaces
#
# Apply the following color spaces to text and vector graphics:
# - gray
# - rgb
# - cmyk
# - iccbasedgray/rgb/cmyk
# - spot
# - lab
# - pattern
# - shadings
#
# Required software: PDFlib/PDFlib+PDI/PPS 7
# Required data: none


searchpath = "../data"
outfile = "starter_color.pdf"
title = "Starter Color"

y = 800
x = 50
xoffset1=80
xoffset2 = 100
yoffset = 70
r = 30

from sys import *
from pdflib_py import *

# create a new PDFlib object
p = PDF_new()

try:
  try:
    PDF_set_parameter(p, "SearchPath", searchpath)

    # This means we must check return values of load_font() etc.
    PDF_set_parameter(p, "errorpolicy", "return")

    if PDF_begin_document(p, outfile, "") == -1:
        raise PDFlibException("Error: " + PDF_get_errmsg(p))

    PDF_set_info(p, "Creator", "PDFlib Cookbook")
    buf = title +  '  Revision: 1.1.2.2 '
    PDF_set_info(p, "Title", buf)

    # Load the font
    font = PDF_load_font(p, "Helvetica", "winansi", "")

    if font == -1:
        raise PDFlibException("Error: " + PDF_get_errmsg(p))

    # Start the page
    PDF_begin_page_ext(p, 0, 0, "width=a4.width height=a4.height")

    PDF_setfont(p, font, 14)


    # -------------------------------------------------------------------
    # Use default colors
    #
    # If no special color is set the default values will be used. The
    # default values are restored at the beginning of the page.
    # 0=black in the Gray color space is the default fill and stroke
    # color in many cases, as shown in our sample.
    # -------------------------------------------------------------------
    

    # Fill a circle with the default black fill color
    y = y - yoffset
    PDF_circle(p, x, y, r)
    PDF_fill(p)

    # Output text with default black fill color
    PDF_fit_textline(p,
            "Circle and text filled with default color {gray 0}",
            x+xoffset2, y, "")

    PDF_fit_textline(p, "1.", x+xoffset1, y, "")

    # -------------------------------------------------------------------
    # Use the Gray color space
    #
    # Gray color is defined by Gray values between 0=black and 1=white.
    # -------------------------------------------------------------------
    

    # Using setcolor(), set the current fill color to a light gray
    # represented by (0.5, 0, 0, 0) which defines 50% gray. Since gray
    # colors are defined by only one value, the last three function
    # parameters must be set to 0.
    
    PDF_setcolor(p, "fill", "gray", 0.5, 0, 0, 0)

    # Fill a circle with the current fill color defined above
    y = y - yoffset
    PDF_circle(p, x, y, r)
    PDF_fill(p)

    # Output text with the current fill color
    PDF_fit_textline(p, "Circle and text filled with {gray 0.5}",
            x+xoffset2, y, "")

    # Alternatively, you can set the fill color in the call to
    # fit_textline() using the "fillcolor" option. This case applies the
    # fill color just the single function call. The current fill color
    # won't be affected.
    
    PDF_fit_textline(p, "2.", x+xoffset1, y, "fillcolor={gray 0.5}")


    # --------------------------------------------------------------------
    # Use the RGB color space
    #
    # RGB color is defined by RGB triples, i.e. three values between 0 and
    # 1 specifying the percentage of red, green, and blue.
    # (0, 0, 0) is black and (1, 1, 1) is white. The commonly used RGB
    # color values in the range 0-255 must be divided by 255 in order to
    # scale them to the range 0-1 as required by PDFlib.
    # --------------------------------------------------------------------
    

    # Use setcolor() to set the fill color to a grass-green
    # represented by (0.1, 0.95, 0.3, 0) which defines 10% red, 95% green,
    # 30% blue. Since RGB colors are defined by only three values, the last
    # function parameter must be set to 0.
    
    PDF_setcolor(p, "fill", "rgb", 0.1, 0.95, 0.3, 0)

    # Draw a circle with the current fill color defined above
    y = y - yoffset
    PDF_circle(p, x, y, r)
    PDF_fill(p)

    # Output a text line with the RGB fill color defined above
    PDF_fit_textline(p, "Circle and text filled with {rgb 0.1 0.95 0.3}",
            x+xoffset2, y, "")

    # Alternatively, you can set the fill color in the call to
    # fit_textline() using the "fillcolor" option. This case applies the
    # fill color just the single function call. The current fill color
    # won't be affected.
    
    PDF_fit_textline(p, "3.", x+xoffset1, y,
            "fillcolor={rgb 0.1 0.95 0.3}")


    # --------------------------------------------------------------------
    # Use the CMYK color space
    #
    # CMYK color is defined by four CMYK values between 0 = no color and
    # 1 = full color representing cyan, magenta, yellow, and black values
    # (0, 0, 0, 0) is white and (0, 0, 0, 1) is black.
    # --------------------------------------------------------------------
    

    # Use setcolor() to set the current fill color to a pale
    # orange, represented by (0.1, 0.7, 0.7, 0.1) which defines 10% Cyan,
    # 70% Magenta, 70% Yellow, and 10% Black.
    
    PDF_setcolor(p, "fill", "cmyk", 0.1, 0.7, 0.7, 0.1)

    # Fill a circle with the current fill color defined above
    y = y - yoffset
    PDF_circle(p, x, y, r)
    PDF_fill(p)

    # Output a text line with the CMYK fill color defined above
    PDF_fit_textline(p,
            "Circle and text filled with {cmyk 0.1 0.7 0.7 0.1}",
            x+xoffset2, y, "")

    # Alternatively, you can set the fill color in the call to
    # fit_textline() using the "fillcolor" option. This case applies the
    # fill color just the single function call. The current fill color
    # won't be affected.
    
    PDF_fit_textline(p, "4.", x+xoffset1, y,
            "fillcolor={cmyk 0.1 0.7 0.7 0.1}")


    # --------------------------------------------------------------------
    # Use a Lab color
    #
    # Device-independent color in the CIE L*a*b* color space is specified
    # by a luminance value in the range 0-100 and two color values in the
    # range -127 to 128. The first value contains the green-red axis,
    # while the second value contains the blue-yellow axis.
    # --------------------------------------------------------------------
    

    # Set the current fill color to a loud blue, represented by
    # (100, -127, -127, 0). Since Lab colors are defined by only three
    # values, the last function parameter must be set to 0.
    
    PDF_setcolor(p, "fill", "lab", 100, -127, -127, 0)

    # Fill a circle with the fill color defined above
    y = y - yoffset
    PDF_circle(p, x, y, r)
    PDF_fill(p)

    # Output a text line with the Lab fill color defined above
    PDF_fit_textline(p, "Circle and text filled with {lab 100 -127 -127}",
            x+xoffset2, y, "")

    # Alternatively, you can set the fill color in the call to
    # fit_textline() using the "fillcolor" option. This case applies the
    # fill color just the single function call. The current fill color
    # won't be affected.
    
    PDF_fit_textline(p, "5.", x+xoffset1, y,
            "fillcolor={lab 100 -127 -127}")


    # ---------------------------------------------------------------
    # Use an ICC based color
    #
    # ICC-based colors are specified with the help of an ICC profile.
    # ---------------------------------------------------------------
    

    # Load the sRGB profile. sRGB is guaranteed to be always available
    icchandle = PDF_load_iccprofile(p, "sRGB", "usage=iccbased")

    # Set the sRGB profile. (Accordingly, you can use
    # "setcolor:iccprofilergb" or "setcolor:iccprofilegray" with an
    # appropriate profile)
    
    PDF_set_value(p, "setcolor:iccprofilergb", icchandle)

    # Use setcolor() with the "iccbasedrgb" color space to set the current
    # fill and stroke color to a grass-green, represented
    # by the RGB color values (0.1 0.95 0.3 0) which define 10% Red,
    # 95% Green, and 30% Blue. Since iccbasedrgb colors are defined by only
    # three values, the last function parameter must be set to 0.
    
    PDF_setcolor(p, "fill", "iccbasedrgb", 0.1, 0.95, 0.3, 0)

    # Fill a circle with the ICC based RGB fill color defined above
    y = y - yoffset
    PDF_circle(p, x, y, r)
    PDF_fill(p)

    # Output a text line with the ICC based RGB fill color defined above
    PDF_fit_textline(p,
            "Circle and text filled with {iccbasedrgb 0.1 0.95 0.3}",
            x+xoffset2, y, "")

    # Alternatively, you can set the fill color in the call to
    # fit_textline() using the "fillcolor" option. This case applies the
    # fill color just the single function call. The current fill color
    # won't be affected.
    
    PDF_fit_textline(p, "6.", x+xoffset1, y,
            "fillcolor={iccbasedrgb 0.1 0.95 0.3}")


    # --------------------------------------------------------------------
    # Use a spot color
    #
    # Spot color (separation color space) is a predefined or arbitrarily
    # named custom color with an alternate representation in one of the
    # other color spaces above; this is generally used for preparing
    # documents which are intended to be printed on an offset printing
    # machine with one or more custom colors. The tint value (percentage)
    # ranges from 0 = no color to 1 = maximum intensity of the spot color.
    # --------------------------------------------------------------------
    

    # Define the spot color "PANTONE 281 U" from the builtin color
    # library PANTONE
    
    spot = PDF_makespotcolor(p, "PANTONE 281 U")

    # Set the spot color "PANTONE 281 U" with a tint value of 1 (=100%)
    # and output some text. Since spot colors are defined by only two
    # values, the last two function parameters must be set to 0.
    
    PDF_setcolor(p, "fill", "spot", spot, 1.0, 0, 0)

    # Fill a circle with the ICC based RGB fill color defined above
    y = y - yoffset
    PDF_circle(p, x, y, r)
    PDF_fill(p)

    PDF_fit_textline(p,
            "Circle and text filled with {spotname {PANTONE 281 U} 1}",
            x+xoffset2, y, "")

    # Alternatively, you can set the fill color in the call to
    # fit_textline() using the "fillcolor" option. This case applies the
    # fill color just the single function call. The current fill color
    # won't be affected.
    
    PDF_fit_textline(p, "7.", x+xoffset1, y,
        "fillcolor={spotname {PANTONE 281 U} 1}")

    # or
    buf = "fillcolor={spot " + repr(spot) + " 1}"
    PDF_fit_textline(p, "7.", x+xoffset1, y, buf)


    # ----------------------------------------------------------
    # For using the Pattern color space, see the Cookbook topics
    # graphics/fill_pattern and images/background_pattern.
    # ----------------------------------------------------------
    

    # ---------------------------------------------------------
    # For using the Shading color space, see the Cookbook topic
    # color/color_gradient.
    # ---------------------------------------------------------
   

    PDF_end_page_ext(p, "")

    PDF_end_document(p, "")

  except PDFlibException:
    print("PDFlib exception occurred:\n[%d] %s: %s" %
	((PDF_get_errnum(p)), PDF_get_apiname(p),  PDF_get_errmsg(p)))

  except Exception:
    print("Exception occurred: %s" % (exc_info()[0]))

finally:
    PDF_delete(p)
