Add antialias config option

Closes #41

spec/data/samples/autoscale_font.rb.txt

@@ -1,3 +1,6 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:white])
 cairo: paint([])

spec/data/samples/basic.rb.txt

@@ -1,3 +1,6 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:white])
 cairo: paint([])

spec/data/samples/cairo_access.rb.txt

@@ -1,3 +1,5 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:white])
 cairo: paint([])

spec/data/samples/csv_import.rb.txt

@@ -1,3 +1,5 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:white])
 cairo: paint([])

spec/data/samples/custom_config.rb.txt

@@ -1,3 +1,4 @@
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color(["#ccc"])
 cairo: paint([])

spec/data/samples/draw_shapes.rb.txt

@@ -1,3 +1,4 @@
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: rounded_rectangle([300, 300, 400, 400, 0, 0])
 cairo: set_source_color([:red])

spec/data/samples/excel.rb.txt

@@ -1,3 +1,6 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:white])
 cairo: paint([])

spec/data/samples/gradients.rb.txt

@@ -1,3 +1,4 @@
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source([LinearPattern])
 cairo: paint([])

spec/data/samples/hello_world.rb.txt

@@ -1,3 +1,5 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:black])
 cairo: translate([0, 0])

spec/data/samples/load_images.rb.txt

@@ -1,3 +1,4 @@
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color(["#0b7c8e"])
 cairo: paint([])

spec/data/samples/portrait-landscape.rb.txt

@@ -1,3 +1,4 @@
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color(["#aaa"])
 cairo: paint([])
@@ -20,6 +21,7 @@ cairo: update_pango_layout([MockDouble])
 cairo: show_pango_layout([MockDouble])
 cairo: restore([])
 surface: write_to_png(["_output/portrait_00.png"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color(["#aaa"])
 cairo: paint([])

spec/data/samples/ranges.rb.txt

@@ -1,3 +1,6 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:white])
 cairo: paint([])

spec/data/samples/saves.rb.txt

@@ -1,3 +1,19 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:gray])
 cairo: paint([])

spec/data/samples/showcase.rb.txt

@@ -1,3 +1,7 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color(["#CE534D"])
 cairo: paint([])

spec/data/samples/text_options.rb.txt

@@ -1,3 +1,6 @@
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:white])
 cairo: paint([])

spec/data/samples/tgc_proofs.rb.txt

@@ -1,3 +1,4 @@
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color([:white])
 cairo: paint([])

spec/data/samples/units.rb.txt

@@ -1,3 +1,4 @@
+cairo: antialias=(["best"])
 cairo: save([])
 cairo: set_source_color(["#ddd"])
 cairo: paint([])

spec/graphics/graphics_images_spec.rb

@@ -15,10 +15,13 @@ describe Squib::Card do
       allow(@deck).to receive(:dir).and_return('_output')
       allow(@deck).to receive(:count_format).and_return('%02d')
       allow(@deck).to receive(:prefix).and_return('card_')
+      allow(@deck).to receive(:antialias).and_return('best')
+
   end
 
   context '#png' do
     it 'makes all the expected calls on a smoke test' do
+      expect(@context).to receive(:antialias=).with('best')
       expect(@context).to receive(:save).once
       expect(@context).to receive(:translate).with(-37, -38).once
       expect(@context).to receive(:rotate).with(0.0).once
@@ -45,6 +48,7 @@ describe Squib::Card do
     it 'makes all the expected calls on a smoke test' do
       expect(@svg).to receive(:width).and_return(100).twice
       expect(@svg).to receive(:height).and_return(100).twice
+      expect(@context).to receive(:antialias=).with('best').once
       expect(@context).to receive(:save).once
       expect(@context).to receive(:rotate).with(0.0).once
       expect(@context).to receive(:translate).with(37, 38).once

spec/graphics/graphics_save_doc_spec.rb

@@ -20,13 +20,14 @@ describe Squib::Deck, '#save_pdf' do
     before(:each) do
       allow(Cairo::PDFSurface).to receive(:new).and_return(nil) #don't create the file
       allow(Cairo::Context).to    receive(:new).and_return(cxt)
+      allow(cxt).to receive(:antialias=)
     end
 
     it 'make all the expected calls on a smoke test' do
       num_cards = 9
       deck = Squib::Deck.new(cards: 9, width: 825, height: 1125)
-      expect(Squib.logger).to receive(:debug).at_least(:once)
       expect(deck).to receive(:dirify) { |arg| arg } #don't create the dir
+      expect(Squib.logger).to receive(:debug).at_least(:once)
 
       expect_card_place(75, 75)
       expect_card_place(831, 75)

spec/graphics/graphics_shapes_spec.rb

@@ -18,10 +18,12 @@ describe Squib::Card do
     allow(@deck).to receive(:dir).and_return('_output')
     allow(@deck).to receive(:count_format).and_return('%02d')
     allow(@deck).to receive(:prefix).and_return('card_')
+    allow(@deck).to receive(:antialias).and_return('best')
   end
 
   context 'rect' do
     it 'make all the expected calls on a smoke test' do
+      expect(@context).to receive(:antialias=).with('best')
       expect(@context).to receive(:save).once
       expect(@context).to receive(:rounded_rectangle).with(37, 38, 50, 100, 10, 15).twice
       expect_stroke('#fff', '#f00', 2.0)
@@ -36,6 +38,7 @@ describe Squib::Card do
 
   context 'circle' do
     it 'make all the expected calls on a smoke test' do
+      expect(@context).to receive(:antialias=).with('best')
       expect(@context).to receive(:save).once
       expect(@context).to receive(:move_to).with(137, 38)
       expect(@context).to receive(:circle).with(37, 38, 100).twice
@@ -51,6 +54,7 @@ describe Squib::Card do
 
   context 'triangle' do
     it 'make all the expected calls on a smoke test' do
+      expect(@context).to receive(:antialias=).with('best')
       expect(@context).to receive(:save).once
       expect(@context).to receive(:triangle).with(1, 2, 3, 4, 5, 6).twice
       expect_stroke('#fff', '#f00', 2.0)
@@ -63,6 +67,7 @@ describe Squib::Card do
 
   context 'line' do
     it 'make all the expected calls on a smoke test' do
+      expect(@context).to receive(:antialias=).with('best')
       expect(@context).to receive(:save).once
       expect(@context).to receive(:move_to).with(1, 2).once
       expect(@context).to receive(:line_to).with(3, 4).once

spec/graphics/graphics_text_spec.rb

@@ -14,11 +14,13 @@ describe Squib::Card, '#text' do
       allow(deck).to receive(:dir).and_return('_output')
       allow(deck).to receive(:count_format).and_return('%02d')
       allow(deck).to receive(:prefix).and_return('card_')
+      allow(deck).to receive(:antialias).and_return('best')
     end
 
     it 'make all the expected calls on a smoke test' do
       extent = Pango::Rectangle.new(50,60,100,200)
       expect(Squib.logger).to receive(:debug).once
+      expect(context).to receive(:antialias=).with('best').once
       expect(context).to receive(:save).once
       expect(context).to receive(:set_source_color).once
       expect(context).to receive(:move_to).with(10, 15).once
@@ -67,6 +69,7 @@ describe Squib::Card, '#text' do
       allow(deck).to receive(:dir).and_return('_output')
       allow(deck).to receive(:count_format).and_return('%02d')
       allow(deck).to receive(:prefix).and_return('card_')
+      allow(deck).to receive(:antialias).and_return('best')
     end
 
     it 'aligns right with strings' do

spec/spec_helper.rb

@@ -76,7 +76,8 @@ def mock_cairo(strio)
   %w(save set_source_color paint restore translate rotate move_to
     update_pango_layout width height show_pango_layout rounded_rectangle
     set_line_width stroke fill set_source scale render_rsvg_handle circle
-    triangle line_to operator= show_page clip transform mask rectangle reset_clip).each do |m|
+    triangle line_to operator= show_page clip transform mask rectangle
+    reset_clip antialias=).each do |m|
     allow(cxt).to receive(m) { |*args| strio << scrub_hex("cairo: #{m}(#{args})\n") }
   end