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# coding: UTF-8
# frozen_string_literal: true
#============================================================+
# Begin : 2008-06-09
# Last Update : 2010-05-20
#
# Description : Example 030 for RBPDF class
# Colour gradients
#
# Author: Jun NAITOH
# License: LGPL 2.1 or later
#============================================================+
require("example_common.rb")
class Example030Controller < ApplicationController
def index
# create new PDF document
pdf = RBPDF.new(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false)
# set document information
pdf.set_creator(PDF_CREATOR)
pdf.set_author(PDF_AUTHOR)
pdf.set_title('RBPDF Example 030')
pdf.set_subject('RBPDF Tutorial')
pdf.set_keywords('RBPDF, PDF, example, test, guide')
# set default header data
pdf.set_header_data(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE + ' 030', PDF_HEADER_STRING)
# set header and footer fonts
pdf.set_header_font([PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN])
pdf.set_footer_font([PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA])
# set default monospaced font
pdf.set_default_monospaced_font(PDF_FONT_MONOSPACED)
# set margins
pdf.set_margins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT)
pdf.set_header_margin(PDF_MARGIN_HEADER)
pdf.set_footer_margin(PDF_MARGIN_FOOTER)
# set auto page breaks
pdf.set_auto_page_break(true, PDF_MARGIN_BOTTOM)
# set image scale factor
pdf.set_image_scale(PDF_IMAGE_SCALE_RATIO)
# set some language-dependent strings
pdf.set_language_array($l)
# ---------------------------------------------------------
# set font
pdf.set_font('helvetica', 'B', 20)
# --- first page ------------------------------------------
# add a page
pdf.add_page()
pdf.cell(0, 0, 'RBPDF Gradients', 0, 1, 'C', 0, '', 0, false, 'T', 'M')
# set colors for gradients (r,g,b) or (grey 0-255)
red = [255, 0, 0]
blue = [0, 0, 200]
yellow = [255, 255, 0]
green = [0, 255, 0]
white = [255]
black = [0]
# set the coordinates x1,y1,x2,y2 of the gradient (see linear_gradient_coords.jpg)
coords = [0, 0, 1, 0]
# paint a linear gradient
pdf.linear_gradient(20, 45, 80, 80, red, blue, coords)
# write label
pdf.text(20, 130, 'LinearGradient()')
# set the coordinates fx,fy,cx,cy,r of the gradient (see radial_gradient_coords.jpg)
coords = [0.5, 0.5, 1, 1, 1.2]
# paint a radial gradient
pdf.radial_gradient(110, 45, 80, 80, white, black, coords)
# write label
pdf.text(110, 130, 'RadialGradient()')
# paint a coons patch mesh with default coordinates
pdf.coons_patch_mesh(20, 155, 80, 80, yellow, blue, green, red)
# write label
pdf.text(20, 240, 'CoonsPatchMesh()')
# set the coordinates for the cubic B�zier points x1,y1 ... x12, y12 of the patch (see coons_patch_mesh_coords.jpg)
coords = [
0.00, 0.00, 0.33, 0.20, # lower left
0.67, 0.00, 1.00, 0.00, 0.80, 0.33, # lower right
0.80, 0.67, 1.00, 1.00, 0.67, 0.80, # upper right
0.33, 1.00, 0.00, 1.00, 0.20, 0.67, # upper left
0.00, 0.33] # lower left
coords_min = 0 # minimum value of the coordinates
coords_max = 1 # maximum value of the coordinates
# paint a coons patch gradient with the above coordinates
pdf.coons_patch_mesh(110, 155, 80, 80, yellow, blue, green, red, coords, coords_min, coords_max)
# write label
pdf.text(110, 240, 'CoonsPatchMesh()')
# --- second page -----------------------------------------
pdf.add_page()
# first patch: f = 0
patch_array = []
patch_array[0] = {}
patch_array[0]['f'] = 0
patch_array[0]['points'] = [
0.00,0.00, 0.33,0.00,
0.67,0.00, 1.00,0.00, 1.00,0.33,
0.8,0.67, 1.00,1.00, 0.67,0.8,
0.33,1.80, 0.00,1.00, 0.00,0.67,
0.00,0.33]
patch_array[0]['colors'] = []
patch_array[0]['colors'][0] = {'r' => 255, 'g' => 255, 'b' => 0}
patch_array[0]['colors'][1] = {'r' => 0, 'g' => 0, 'b' => 255}
patch_array[0]['colors'][2] = {'r' => 0, 'g' => 255,'b' => 0}
patch_array[0]['colors'][3] = {'r' => 255, 'g' => 0,'b' => 0}
# second patch - above the other: f = 2
patch_array[1] = {}
patch_array[1]['f'] = 2
patch_array[1]['points'] = [
0.00,1.33,
0.00,1.67, 0.00,2.00, 0.33,2.00,
0.67,2.00, 1.00,2.00, 1.00,1.67,
1.5,1.33]
patch_array[1]['colors'] = []
patch_array[1]['colors'][0] = {'r' => 0, 'g' => 0, 'b' => 0}
patch_array[1]['colors'][1] = {'r' => 255, 'g' => 0, 'b' => 255}
# third patch - right of the above: f = 3
patch_array[2] = {}
patch_array[2]['f'] = 3
patch_array[2]['points'] = [
1.33,0.80,
1.67,1.50, 2.00,1.00, 2.00,1.33,
2.00,1.67, 2.00,2.00, 1.67,2.00,
1.33,2.00]
patch_array[2]['colors'] = []
patch_array[2]['colors'][0] = {'r' => 0, 'g' => 255, 'b' => 255}
patch_array[2]['colors'][1] = {'r' => 0, 'g' => 0, 'b' => 0}
# fourth patch - below the above, which means left(?) of the above: f = 1
patch_array[3] = {}
patch_array[3]['f'] = 1
patch_array[3]['points'] = [
2.00,0.67,
2.00,0.33, 2.00,0.00, 1.67,0.00,
1.33,0.00, 1.00,0.00, 1.00,0.33,
0.8,0.67]
patch_array[3]['colors'] = []
patch_array[3]['colors'][0] = {'r' => 0, 'g' => 0, 'b' => 0}
patch_array[3]['colors'][1] = {'r' => 0, 'g' => 0, 'b' => 255}
coords_min = 0
coords_max = 2
pdf.coons_patch_mesh(10, 45, 190, 200, '', '', '', '', patch_array, coords_min, coords_max)
# write label
pdf.text(10, 250, 'CoonsPatchMesh()')
# ---------------------------------------------------------
# Close and output PDF document
send_data pdf.output(), :type => "application/pdf", :disposition => "inline"
end
end
#============================================================+
# END OF FILE
#============================================================+
|
