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require "test-setup"
require "lunit"
local Cairo = require "oocairo"
module("test.pattern", lunit.testcase, package.seeall)
function test_solid_rgb ()
local pat = Cairo.pattern_create_rgb(0.25, 0.5, 0.75)
assert_userdata(pat)
assert_equal("cairo pattern object", pat._NAME)
assert_equal("solid", pat:get_type())
assert_equal(nil, pat:status(), "Error status on pattern")
local r, g, b, a = pat:get_rgba()
assert_equal(0.25, r)
assert_equal(0.5, g)
assert_equal(0.75, b)
assert_equal(1, a)
end
function test_solid_rgba ()
local pat = Cairo.pattern_create_rgba(0.25, 0.5, 0.75, 0.125)
assert_userdata(pat)
assert_equal("cairo pattern object", pat._NAME)
assert_equal("solid", pat:get_type())
assert_equal(nil, pat:status(), "Error status on pattern")
local r, g, b, a = pat:get_rgba()
assert_equal(0.25, r)
assert_equal(0.5, g)
assert_equal(0.75, b)
assert_equal(0.125, a)
end
function test_surface ()
local surface = Cairo.image_surface_create("rgb24", 23, 45)
local pat = Cairo.pattern_create_for_surface(surface)
assert_userdata(pat)
assert_equal("cairo pattern object", pat._NAME)
assert_equal("surface", pat:get_type())
assert_equal(nil, pat:status(), "Error status on pattern")
local gotsurface = pat:get_surface()
assert_userdata(gotsurface)
assert_equal("cairo surface object", gotsurface._NAME)
local wd, ht = gotsurface:get_width(), gotsurface:get_height()
assert_equal(23, wd)
assert_equal(45, ht)
end
function test_linear_gradient ()
local g = Cairo.pattern_create_linear(3, 4, 8, 9)
assert_userdata(g)
assert_equal("cairo pattern object", g._NAME)
assert_equal("linear", g:get_type())
assert_equal(nil, g:status(), "Error status on pattern")
local x0, y0, x1, y1 = g:get_linear_points()
assert_equal(3, x0)
assert_equal(4, y0)
assert_equal(8, x1)
assert_equal(9, y1)
end
function test_radial_gradient ()
local g = Cairo.pattern_create_radial(3, 4, 5, 8, 9, 10)
assert_userdata(g)
assert_equal("cairo pattern object", g._NAME)
assert_equal(nil, g:status(), "Error status on pattern")
assert_equal("radial", g:get_type())
local x0, y0, r0, x1, y1, r1 = g:get_radial_circles()
assert_equal(3, x0)
assert_equal(4, y0)
assert_equal(5, r0)
assert_equal(8, x1)
assert_equal(9, y1)
assert_equal(10, r1)
end
function test_wrong_pattern_type ()
local pat = Cairo.pattern_create_radial(3, 4, 5, 8, 9, 10)
assert_error("not linear gradient, get points", function ()
pat:get_linear_points()
end)
pat = Cairo.pattern_create_linear(3, 4, 8, 9)
assert_error("not radial gradient, get circles", function ()
pat:get_radial_circles()
end)
assert_error("not surface gradient, get surface", function ()
pat:get_surface()
end)
end
local function check_color_stop (i, stop, offset, r, g, b, a)
assert_table(stop, "table for color stop " .. i)
assert_equal(stop[1], offset, "offset for color stop " .. i)
assert_equal(stop[2], r, "red for color stop " .. i)
assert_equal(stop[3], g, "green for color stop " .. i)
assert_equal(stop[4], b, "blue for color stop " .. i)
assert_equal(stop[5], a, "alpha for color stop " .. i)
end
function test_add_color_stop ()
local pat = Cairo.pattern_create_linear(3, 4, 8, 9)
pat:add_color_stop_rgb(0, 0.25, 0.5, 0.75)
pat:add_color_stop_rgb(0.125, 1, 0, 1)
pat:add_color_stop_rgba(0.875, 0, 1, 0, 0.5)
pat:add_color_stop_rgba(1, 1, 1, 1, 1)
local stops = pat:get_color_stops()
assert_table(stops)
assert_equal(4, #stops)
check_color_stop(1, stops[1], 0, 0.25, 0.5, 0.75, 1)
check_color_stop(2, stops[2], 0.125, 1, 0, 1, 1)
check_color_stop(3, stops[3], 0.875, 0, 1, 0, 0.5)
check_color_stop(4, stops[4], 1, 1, 1, 1, 1)
end
function test_extend ()
local pat = Cairo.pattern_create_linear(3, 4, 8, 9)
assert_error("bad value", function () pat:set_extend("foo") end)
assert_error("missing value", function () pat:set_extend(nil) end)
assert_equal("pad", pat:get_extend(), "default intact after error")
for _, v in ipairs{ "none", "repeat", "reflect", "pad" } do
pat:set_extend(v)
assert_equal(v, pat:get_extend())
end
end
function test_filter ()
local pat = Cairo.pattern_create_linear(3, 4, 8, 9)
assert_error("bad value", function () pat:set_filter("foo") end)
assert_error("missing value", function () pat:set_filter(nil) end)
assert_equal("good", pat:get_filter(), "default intact after error")
for _, v in ipairs{
"fast", "good", "best", "nearest", "bilinear", "gaussian"
} do
pat:set_filter(v)
assert_equal(v, pat:get_filter())
end
end
function test_not_gradient_pattern ()
local pat = Cairo.pattern_create_rgb(0.25, 0.5, 0.75)
assert_error("add_color_stop_rgb on non-gradient pattern",
function () pat:add_color_stop_rgb(0, 0.1, 0.2, 0.3) end)
assert_error("add_color_stop_rgba on non-gradient pattern",
function () pat:add_color_stop_rgba(0, 0.1, 0.2, 0.3, 0.4) end)
end
function test_equality ()
-- Different userdatas, same Cairo object.
local surface = Cairo.image_surface_create("rgb24", 23, 45)
local pattern1 = Cairo.pattern_create_rgb(0.25, 0.5, 0.75)
local cr = Cairo.context_create(surface)
cr:set_source(pattern1)
local pattern2 = cr:get_source()
assert_true(pattern1 == pattern2)
-- Different userdatas, different Cairo objects.
local pattern3 = Cairo.pattern_create_rgb(0.25, 0.5, 0.75)
assert_false(pattern1 == pattern3)
end
function test_double_gc ()
local surface = Cairo.image_surface_create("rgb24", 23, 45)
local pattern = Cairo.pattern_create_rgb(0.25, 0.5, 0.75)
pattern:__gc()
pattern:__gc()
end
-- vi:ts=4 sw=4 expandtab
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