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require "test-setup"
require "lunit"
local Cairo = require "oocairo"
module("test.font_face", lunit.testcase, package.seeall)
function test_double_gc ()
local surface = Cairo.image_surface_create("rgb24", 23, 45)
local cr = Cairo.context_create(surface)
local face = cr:get_font_face()
face:__gc()
face:__gc()
end
function test_select_get_set_font_face ()
local surface = Cairo.image_surface_create("rgb24", 23, 45)
local cr = Cairo.context_create(surface)
cr:select_font_face("sans", "normal", "normal")
local sans = cr:get_font_face()
assert_equal(nil, sans:status(), "Error status on font face")
assert_userdata(sans)
assert_equal("cairo font face object", sans._NAME)
assert_equal("toy", sans:get_type())
cr:select_font_face("serif", "italic", "bold")
local serif = cr:get_font_face()
cr:set_font_face(sans)
assert_equal(sans, cr:get_font_face())
cr:set_font_face(serif)
assert_equal(serif, cr:get_font_face())
end
function test_select_font_face ()
local surface = Cairo.image_surface_create("rgb24", 23, 45)
local cr = Cairo.context_create(surface)
cr:select_font_face("sans", "italic", "bold")
if Cairo.toy_font_face_create then
local font = cr:get_font_face()
assert_equal("sans", font:get_family())
assert_equal("italic", font:get_slant())
assert_equal("bold", font:get_weight())
end
cr:select_font_face("serif", "italic")
if Cairo.toy_font_face_create then
local font = cr:get_font_face()
assert_equal("serif", font:get_family())
assert_equal("italic", font:get_slant())
assert_equal("normal", font:get_weight())
end
cr:select_font_face("serif", nil, "bold")
if Cairo.toy_font_face_create then
local font = cr:get_font_face()
assert_equal("serif", font:get_family())
assert_equal("normal", font:get_slant())
assert_equal("bold", font:get_weight())
end
cr:select_font_face("serif")
if Cairo.toy_font_face_create then
local font = cr:get_font_face()
assert_equal("serif", font:get_family())
assert_equal("normal", font:get_slant())
assert_equal("normal", font:get_weight())
end
assert_error("bad family name",
function () cr:select_font_face({}, "normal", "normal") end)
assert_error("bad slant value",
function () cr:select_font_face("sans", "foo", "normal") end)
assert_error("bad weight value",
function () cr:select_font_face("sans", "normal", "foo") end)
end
function test_toy_create_and_accessors ()
if Cairo.toy_font_face_create then
local font = Cairo.toy_font_face_create("serif", "italic", "bold")
assert_userdata(font)
assert_equal("cairo font face object", font._NAME)
assert_equal("toy", font:get_type())
assert_equal("serif", font:get_family())
assert_equal("italic", font:get_slant())
assert_equal("bold", font:get_weight())
-- Two styling options should default to 'normal'.
font = Cairo.toy_font_face_create("serif", "italic")
assert_equal("italic", font:get_slant())
assert_equal("normal", font:get_weight())
font = Cairo.toy_font_face_create("serif")
assert_equal("normal", font:get_slant())
assert_equal("normal", font:get_weight())
else
local surface = Cairo.image_surface_create("rgb24", 23, 45)
local font = Cairo.context_create(surface):get_font_face()
assert_nil(Cairo.toy_font_face_create)
assert_nil(font.get_family)
assert_nil(font.get_slant)
assert_nil(font.get_weight)
end
end
function test_user_font ()
if Cairo.user_font_face_create then
-- Should work with only one callback defined.
local font = Cairo.user_font_face_create({
render_glyph = function() end,
})
assert_userdata(font)
assert_equal("cairo font face object", font._NAME)
assert_equal("user", font:get_type())
-- Take this oppurtunity to test that certain methods don't work on
-- non-toy font face objects.
assert_error("get_family", function () font:get_family() end)
assert_error("get_slant", function () font:get_slant() end)
assert_error("get_weight", function () font:get_weight() end)
-- Test all callbacks are called right.
local called_callbacks = {}
local init = function (font, cr, extents)
if not called_callbacks.init then
assert_equal("cairo scaled font object", font._NAME)
assert_equal("cairo context object", cr._NAME)
assert_table(extents)
assert_number(extents.ascent)
end
called_callbacks.init = true
end
local render_glyph = function (font, glyph, cr, extents)
if not called_callbacks.render_glyph then
assert_equal("cairo scaled font object", font._NAME)
assert_equal(string.byte("x"), glyph)
assert_equal("cairo context object", cr._NAME)
assert_table(extents)
assert_number(extents.x_bearing)
end
called_callbacks.render_glyph = true
extents.x_advance = 1.5
end
local text_to_glyphs = function (font, utf8, want_clusters)
if not called_callbacks.text_to_glyphs then
assert_equal("cairo scaled font object", font._NAME)
assert_string(utf8)
assert_boolean(want_clusters)
end
called_callbacks.text_to_glyphs = true
return nil -- no glyph info provided here
end
local unicode_to_glyph = function (font, unicode)
if not called_callbacks.unicode_to_glyph then
assert_equal("cairo scaled font object", font._NAME)
assert_number(unicode)
assert(unicode > 0)
end
called_callbacks.unicode_to_glyph = true
return unicode
end
local surface = Cairo.image_surface_create("rgb24", 50, 50)
local cr = Cairo.context_create(surface)
cr:set_font_face(Cairo.user_font_face_create({
init = init,
render_glyph = render_glyph,
unicode_to_glyph = unicode_to_glyph,
}))
cr:show_text("x")
cr:set_font_face(Cairo.user_font_face_create({
init = init,
render_glyph = render_glyph,
text_to_glyphs = text_to_glyphs,
}))
cr:show_text("x")
assert_true(called_callbacks.init)
assert_true(called_callbacks.render_glyph)
assert_true(called_callbacks.text_to_glyphs)
assert_true(called_callbacks.unicode_to_glyph)
else
assert_nil(Cairo.user_font_face_create)
end
end
function test_user_font_providing_text_clusters ()
if Cairo.user_font_face_create and Cairo.HAS_PDF_SURFACE then
local function text_to_glyphs (font, text, want_clusters)
assert_true(want_clusters)
return { { 123, 10, 20 }, { 321, 11, 22 } }, -- glyphs
{ { 0, 1 }, { 1, 1 } } -- text clusters
end
local filename = tmpname()
local surface = Cairo.pdf_surface_create(filename, 50, 50)
local cr = Cairo.context_create(surface)
cr:set_font_face(Cairo.user_font_face_create({
render_glyph = function() end,
text_to_glyphs = text_to_glyphs,
}))
cr:show_text("x")
end
end
function test_user_font_err ()
if Cairo.user_font_face_create then
-- Options should be provided in a table.
local ok, err = pcall(Cairo.user_font_face_create, "foo")
assert_false(ok)
assert_match("table", err)
-- Missing the one mandatory callback.
ok, err = pcall(Cairo.user_font_face_create, {})
assert_false(ok)
assert_match("the 'render_glyph' option is required", err)
-- Callbacks which aren't function values.
for _, func in ipairs{
"init", "render_glyph", "text_to_glyphs", "unicode_to_glyph",
} do
local options = { render_glyph = function () end }
options[func] = "not a function"
ok, err = pcall(Cairo.user_font_face_create, options)
assert_false(ok)
assert_match("the '" .. func .. "' option.*function", err)
end
end
end
function test_equality ()
-- Different userdatas, same Cairo object.
local surface = Cairo.image_surface_create("rgb24", 23, 45)
local cr = Cairo.context_create(surface)
local font1 = cr:get_font_face()
local font2 = cr:get_font_face()
assert_true(font1 == font2)
-- Different userdatas, different Cairo objects.
cr:select_font_face("serif")
local font3 = cr:get_font_face()
assert_false(font1 == font3)
end
-- vi:ts=4 sw=4 expandtab
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