samples: reorganize for better sanity

Converted to a more consistent organization of each folder for groups of samples

Contributes to #118

samples/images/_cairo_access.rb

@@ -0,0 +1,39 @@
+require 'squib'
+
+Squib::Deck.new(cards: 2) do
+  background color: :white
+  # If you really need something custom-made, the underlying cairo context
+  # can be accessed directly via each Squib::Card
+  #
+  # WARNING! Input validation is not done on Squib::Cards. Proceed at your own risk.
+
+  # The recommended approach is to use Deck's Enumerable, which iterates over Squib::Cards
+  # I also recommend wrapping it in a Cairo save/restore, which Squib calls "use_cairo"
+  each do |card|
+    card.use_cairo do |cairo_context|
+      cairo_context.set_source_color(:blue)
+      cairo_context.circle(150, 150, 150)
+      cairo_context.fill
+    end
+  end
+
+  # Or the square bracket accessors []
+  self[1].use_cairo do |cairo_context|
+    cairo_context.circle(50, 50, 50)
+    cairo_context.set_source_color(:red)
+    cairo_context.fill
+  end
+
+  # Or modify the coordinate system for all (most?) future calls
+  # Could be handy for a dynamic bleed
+  each do |card|
+    # note how this does NOT use save/restore.
+    # again... this "feature" lives in the Land of Undefined Behavior
+    card.cairo_context.translate(500, 500)
+  end
+  rect x: 0, y: 0, # actually 500, 500
+       width: 50, height: 50, fill_color: :red
+
+
+  save_png prefix: 'cairo_access_'
+end

samples/images/_images.rb

@@ -100,5 +100,5 @@ Squib::Deck.new(width: 1000, height: 3000) do
   end
 
 
-  save_png prefix: '_images_', dir: '.'
+  save_png prefix: '_images_'
 end

samples/images/_unicode.rb

@@ -0,0 +1,27 @@
+require 'squib'
+
+# Here's a handy list of game-related UTF-8 characters
+# for those early pre-graphics prototypes
+game_chars = %W(\u2620 \u2622 \u2623 \u00AB \u00BB \u2039 \u203A \u2022 \u20D8 \u20D9 \u20DA \u2023 \u20E1 \u20D4 \u20D5 \u20D6 \u20D7 \u2190 \u2191 \u2192 \u2193 \u2194 \u2196 \u2197 \u2198 \u2199 \u219A \u219B \u219C \u219D \u219E \u219F \u21A0 \u21A1 \u21A2 \u21A3 \u21A4 \u21A5 \u21A6 \u21A7 \u21A8 \u21A9 \u21AA \u21AB \u21AC \u21AD \u21AE \u21AF \u21B0 \u21B1 \u21B2 \u21B3 \u21B4 \u21B5 \u21B6 \u21B7 \u21B8 \u21B9 \u21BA \u21BB \u21C4 \u21C5 \u21C6 \u21C7 \u21C8 \u21C9 \u21CA \u21CD \u21CE \u21CF \u21D0 \u21D1 \u21D2 \u21D3 \u21D4 \u21D5 \u21D6 \u21D7 \u21D8 \u21D9 \u21DA \u21DB \u21DC \u21DD \u21DC \u21E0 \u21E1 \u21E2 \u21E3 \u21E4 \u21E5 \u21E6 \u21E7 \u21E8 \u21E9 \u21EA \u20DE \u20DD \u20DF \u20E0 \u2205 \u220E \u2234 \u2295 \u2296 \u2297 \u2298 \u2349 \u2299 \u229A \u229E \u22B9 \u2302 \u2316 \u231A \u231B \u2326 \u232B \u2327 \u2331 \u2460 \u2461 \u2462 \u2463 \u2464 \u2465 \u2466 \u2467 \u2468 \u2469 \u246A \u246B \u246C \u246D \u246E \u246F \u2470 \u2471 \u2472 \u2473 \u2600 \u2601 \u2602 \u2603 \u2604 \u2605 \u2606 \u2607 \u260E \u2611 \u261A \u261B \u261C \u261D \u261E \u261F \u2624 \u262E \u262F \u2639 \u263A \u2654 \u2655 \u2656 \u2657 \u2658 \u2659 \u265A \u265B \u265C \u265D \u265E \u265F \u2660 \u2661 \u2662 \u2663 \u2664 \u2665 \u2666 \u2667 \u2668 \u2690 \u2691 \u2692 \u2693 \u2694 \u2696 \u2699 \u269B \u26A0 \u26A1 \u26BD \u26BE \u26C4 \u26C5 \u26D4 \u26EA \u26F2 \u26F3 \u26F5 \u26FA \u26FD \u2707 \u270A \u270B \u270C \u2713 \u2714 \u271C \u27F2 \u27F3 \u27F4 \u2B1B \u2B1C \u1F601 \u00BD \u00BE \u00BC \u2153 \u2154 \u2155 \u2156 \u2157 )
+
+cell_height = 80
+cell_width = 400
+cols = 7
+x, y = 1, 80
+Squib::Deck.new(height: (game_chars.size / cols + 1) * cell_height,
+                width: cell_width * cols) do
+  background color: :white
+  text str: 'Game-related UTF8 icons. Generated by Squib, https://github.com/andymeneely/squib'
+  game_chars.each_with_index do |c, i|
+    rect fill_color: %w(#eeee #ffff)[i % 2],
+         width: cell_width, height: cell_height, x: x, y: y
+    text str: c.inspect, font: 'Sans 42',                  x: x, y: y
+    text str: c,         font: 'Sans,Segoe UI Symbol 42',  x: x + 300, y: y
+    x += cell_width
+    if i % cols == cols - 1
+      x = 1
+      y += cell_height if i % cols == cols - 1
+    end
+  end
+  save_png prefix: 'unicode_'
+end