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Maintain coordinate system when using gradients

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Sample: document this better
spec: test this and update past tests

Fixes #127
This commit is contained in:
Andy Meneely
2016-01-10 20:30:30 -05:00
parent 064307365f
commit cf736db067
3 changed files with 60 additions and 47 deletions
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lib/squib/graphics/cairo_context_wrapper.rb
+5 -3
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@@ -37,15 +37,17 @@ module Squib
arg.scan(STOPS).each do |color, offset|
linear.add_color_stop(offset.to_f, color)
end
linear.matrix = matrix # match the coordinate systems - see bug 127
@cairo_cxt.set_source(linear)
elsif match = arg.match(RADIAL_GRADIENT)
x1, y1, r1, x2, y2, r2 = match.captures
linear = Cairo::RadialPattern.new(x1.to_f, y1.to_f, r1.to_f,
radial = Cairo::RadialPattern.new(x1.to_f, y1.to_f, r1.to_f,
x2.to_f, y2.to_f, r2.to_f)
radial.matrix = matrix # match the coordinate systems - see bug 127
arg.scan(STOPS).each do |color, offset|
linear.add_color_stop(offset.to_f, color)
radial.add_color_stop(offset.to_f, color)
end
@cairo_cxt.set_source(linear)
@cairo_cxt.set_source(radial)
else
@cairo_cxt.set_source_color(arg)
end