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require 'spec_helper'
describe Prawn::SoftMask do
let(:pdf) { create_pdf }
def make_soft_mask
pdf.save_graphics_state do
pdf.soft_mask do
if block_given?
yield
else
pdf.fill_color '808080'
pdf.fill_rectangle [100, 100], 200, 200
end
end
pdf.fill_color '000000'
pdf.fill_rectangle [0, 0], 200, 200
end
end
it 'has PDF version at least 1.4' do
make_soft_mask
str = pdf.render
expect(str[0, 8]).to eq('%PDF-1.4')
end
it 'creates a new extended graphics state for each unique soft mask' do
make_soft_mask do
pdf.fill_color '808080'
pdf.fill_rectangle [100, 100], 200, 200
end
make_soft_mask do
pdf.fill_color '808080'
pdf.fill_rectangle [10, 10], 200, 200
end
extgstates = PDF::Inspector::ExtGState.analyze(pdf.render).extgstates
expect(extgstates.length).to eq(2)
end
it 'a new extended graphics state contains soft mask with drawing '\
'instructions' do
make_soft_mask do
pdf.fill_color '808080'
pdf.fill_rectangle [100, 100], 200, 200
end
extgstate = PDF::Inspector::ExtGState.analyze(pdf.render).extgstates.first
expect(extgstate[:soft_mask][:G].data).to eq(
"q\n/DeviceRGB cs\n0.0 0.0 0.0 scn\n/DeviceRGB CS\n0.0 0.0 0.0 SCN\n"\
"1 w\n0 J\n0 j\n[] 0 d\n/DeviceRGB cs\n0.502 0.502 0.502 scn\n"\
"100.0 -100.0 200.0 200.0 re\nf\nQ\n"
)
end
it 'does not create duplicate extended graphics states' do
make_soft_mask do
pdf.fill_color '808080'
pdf.fill_rectangle [100, 100], 200, 200
end
make_soft_mask do
pdf.fill_color '808080'
pdf.fill_rectangle [100, 100], 200, 200
end
extgstates = PDF::Inspector::ExtGState.analyze(pdf.render).extgstates
expect(extgstates.length).to eq(1)
end
end
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