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require "cairo"
require "tempfile"
class RasterSourcePatternTest < Test::Unit::TestCase
include Helper
def setup
only_pattern("RasterSource")
end
def test_acquire_and_release
Cairo::ImageSurface.create(100, 100) do |surface|
Cairo::Context.create(surface) do |context|
context.set_source(1, 1, 1)
context.paint
called = []
red_pattern = Cairo::RasterSourcePattern.new(100, 100)
red_pattern.acquire do |pattern, target, extents|
called << :acquire
red_image = target.create_similar_image(extents.width, extents.height)
red_image.set_device_offset(extents.x, extents.y)
Cairo::Context.create(red_image) do |red_image_context|
red_image_context.set_source(1, 0, 0)
red_image_context.paint
end
red_image
end
red_pattern.release do |pattern, surface|
called << :release
surface.finish
end
context.set_source(red_pattern)
context.rectangle(40, 40, 20, 20)
context.fill
assert_equal([:acquire, :release], called)
end
show_result(surface)
end
end
class SnapshotTest < self
def setup
super
only_surface("Recording")
end
def test_success
Cairo::RecordingSurface.create(0, 0, 100, 100) do |surface|
Cairo::Context.create(surface) do |context|
called = []
raster_source = Cairo::RasterSourcePattern.new(100, 100)
raster_source.snapshot do |pattern|
called << :snapshot
end
context.set_source(raster_source)
context.rectangle(40, 40, 20, 20)
context.fill
assert_equal([:snapshot], called)
end
show_result(surface)
end
end
def test_error
Cairo::RecordingSurface.create(0, 0, 100, 100) do |surface|
Cairo::Context.create(surface) do |context|
called = []
raster_source = Cairo::RasterSourcePattern.new(100, 100)
raster_source.snapshot do |pattern|
called << :snapshot
raise NoMemoryError
end
context.set_source(raster_source)
context.rectangle(40, 40, 20, 20)
assert_raise(NoMemoryError) do
context.fill
end
assert_equal([:snapshot], called)
end
show_result(surface)
end
end
end
class CopyTest < self
def setup
super
only_surface("Script")
end
def test_success
output = StringIO.new
device = Cairo::ScriptDevice.new(output)
Cairo::ScriptSurface.create(device, 100, 200) do |surface|
Cairo::Context.create(surface) do |context|
called = []
raster_source = Cairo::RasterSourcePattern.new(100, 100)
raster_source.acquire do |pattern, target, extents|
called << :acquire
red_image = target.create_similar_image(extents.width,
extents.height)
red_image.set_device_offset(extents.x, extents.y)
Cairo::Context.create(red_image) do |red_image_context|
red_image_context.set_source(1, 0, 0)
red_image_context.paint
end
red_image
end
raster_source.release do |pattern, surface|
called << :release
surface.finish
end
raster_source.copy do |pattern|
called << :copy
end
context.set_source(raster_source)
context.rectangle(40, 40, 20, 20)
context.fill
assert_equal([:copy, :acquire, :release], called)
end
show_result(surface)
end
end
def test_error
output = StringIO.new
device = Cairo::ScriptDevice.new(output)
Cairo::ScriptSurface.create(device, 100, 200) do |surface|
Cairo::Context.create(surface) do |context|
called = []
raster_source = Cairo::RasterSourcePattern.new(100, 100)
raster_source.copy do |pattern|
called << :copy
raise NoMemoryError
end
context.set_source(raster_source)
context.rectangle(40, 40, 20, 20)
assert_raise(NoMemoryError) do
context.fill
end
assert_equal([:copy], called)
end
show_result(surface)
end
end
end
private
def show_result(image_surface)
return if ENV["RCAIRO_TEST_SHOW_RESULT"] != "yes"
result = Tempfile.new("result")
image_surface.write_to_png(result.path)
system("display", result.path)
end
end
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