#!/usr/bin/env ruby

# Generate motherboard form-factors comparison picture in SVG
# (C) Mikhail Yakshin AKA GreyCat, 2007
# License: GPL

WIDTH=4500
HEIGHT=3750
START_X=50
START_Y=50
MARK_LENGTH=30
ARROW_SIZE=100
MARK_STEP=500

# Sizes to show in comparison picture (in mm)
# w - width
# h - height
# ty - if present, text will be shifted by that amount on y coordinate
RECTS = 

# Header
puts <<EOF
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://web.resource.org/cc/"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   width="#{WIDTH}"
   height="#{HEIGHT}"
   id="svg2"
   version="1.0">
  <defs
     id="defs4" />
  <metadata
     id="metadata7">
    <rdf:RDF>
      <cc:Work
         rdf:about="">
        <dc:format>image/svg+xml</dc:format>
        <dc:type
           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
      </cc:Work>
    </rdf:RDF>
  </metadata>
  <linearGradient id="mb_gradient" gradientUnits="objectBoundingBox" x1="0" y1="0" x2="1" y2="1">
    <stop style="stop-color:white;" offset="0.8"/>
    <stop style="stop-color:#78a3d1;" offset="1"/>
  </linearGradient>
EOF

# Rectangles
RECTS.each { |b|
	board_id = b.downcase.gsub(/\//, '-')
	ty = b + START_Y - 1
	ty += b if b
	if b
		puts "  <rect style=\"opacity:1;fill:none;stroke:#b50e70;stroke-width:0.6;stroke-linecap:square;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:7.2,7.2;stroke-opacity:1;stroke-dashoffset:0\""
	else
		puts "  <rect style=\"opacity:1;fill:url(#mb_gradient);fill-opacity:0.5;stroke:black;stroke-width:0.5;stroke-linecap:square;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1\""
	end
	puts <<EOF
     id="#{board_id}"
     width="#{b}"
     height="#{b}"
     x="#{START_X}"
     y="#{START_Y}" />
  <text
     xml:space="preserve"
     style="font-size:6px;text-align:end;text-anchor:end;font-family:sans-serif"
     x="#{b + START_X - 1}"
     y="#{ty}"
     id="#{board_id}_text">#{b}</text>
EOF
}

# Axis
puts <<EOF
  <path
     style="fill:none;fill-opacity:0.75;fill-rule:evenodd;stroke:black;stroke-width:1.4px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
     d="M 0,#{START_Y} L #{WIDTH},#{START_Y}"
     id="x-axis" />
  <path
     style="fill:none;fill-opacity:0.75;fill-rule:evenodd;stroke:black;stroke-width:1.4px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
     d="M #{START_X},0 L #{START_X},#{HEIGHT}"
     id="y-axis" />
EOF

# X-axis marks
1.upto(((WIDTH - START_X) / MARK_STEP).to_i) { |i|
	value = i * MARK_STEP
	puts <<EOF
  <path
     style="fill:none;fill-opacity:0.75;fill-rule:evenodd;stroke:black;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
     d="M #{START_X + value},#{START_Y - MARK_LENGTH} L #{START_X + value},#{START_Y + MARK_LENGTH}"
     id="x-mark#{i}" />
    <text
       style="font-size:8px;font-family:sans-serif;text-anchor:middle"
       x="#{START_X + value}"
       y="#{START_Y + 2.5 + 8}"
       id="x-mark#{i}-text">#{value}</text>
EOF
}

# Y-axis marks
1.upto(((HEIGHT - START_Y) / MARK_STEP).to_i) { |i|
	value = i * 50
	puts <<EOF
  <path
     style="fill:none;fill-opacity:0.75;fill-rule:evenodd;stroke:black;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
     d="M #{START_X - MARK_LENGTH},#{START_Y + value}, L #{START_X + MARK_LENGTH},#{START_Y + value}"
     id="y-mark#{i}" />
    <text
       style="font-size:8px;font-family:sans-serif"
       x="#{START_X + 2.5}"
       y="#{START_Y + value + 2.5}"
       id="y-mark#{i}-text">#{value}</text>
EOF
}

# Arrows
puts <<EOF
    <path
       style="fill:black;fill-opacity:1;fill-rule:evenodd;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
       d="M #{WIDTH},#{START_Y} L #{WIDTH - ARROW_SIZE},#{START_Y - MARK_LENGTH} L #{WIDTH - ARROW_SIZE},#{START_Y + MARK_LENGTH} z "
       id="x-arrow" />
    <path
       style="fill:black;fill-opacity:1;fill-rule:evenodd;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
       d="M #{START_X},#{HEIGHT}, L #{START_X - MARK_LENGTH},#{HEIGHT - ARROW_SIZE} L #{START_X + MARK_LENGTH},#{HEIGHT - ARROW_SIZE} z "
       id="y-arrow" />
</svg>
EOF