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Diffstat (limited to 'vcl/qa/cppunit/cjktext.cxx')
| -rw-r--r-- | vcl/qa/cppunit/cjktext.cxx | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/vcl/qa/cppunit/cjktext.cxx b/vcl/qa/cppunit/cjktext.cxx new file mode 100644 index 0000000000..8dbed792b9 --- /dev/null +++ b/vcl/qa/cppunit/cjktext.cxx @@ -0,0 +1,248 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#include <osl/file.hxx> +#include <osl/process.h> +#include <test/bootstrapfixture.hxx> +#include <sal/log.hxx> +#include <tools/stream.hxx> + +#include <vcl/BitmapReadAccess.hxx> +#include <comphelper/errcode.hxx> +#include <vcl/graphicfilter.hxx> +#include <vcl/settings.hxx> +#include <vcl/svapp.hxx> +#include <vcl/virdev.hxx> + +#include <ImplLayoutArgs.hxx> +#include <TextLayoutCache.hxx> +#include <salgdi.hxx> + +class VclCjkTextTest : public test::BootstrapFixture +{ + // if enabled - check the result images with: + // "xdg-open ./workdir/CppunitTest/vcl_cjk_test.test.core/" + static constexpr const bool mbExportBitmap = false; + + void exportDevice(const OUString& filename, const VclPtr<VirtualDevice>& device) + { + if (mbExportBitmap) + { + BitmapEx aBitmapEx(device->GetBitmapEx(Point(0, 0), device->GetOutputSizePixel())); + OUString cwd; + CPPUNIT_ASSERT_EQUAL(osl_Process_E_None, osl_getProcessWorkingDir(&cwd.pData)); + OUString url; + CPPUNIT_ASSERT_EQUAL(osl::FileBase::E_None, + osl::FileBase::getAbsoluteFileURL(cwd, filename, url)); + SvFileStream aStream(url, StreamMode::WRITE | StreamMode::TRUNC); + CPPUNIT_ASSERT_EQUAL( + ERRCODE_NONE, GraphicFilter::GetGraphicFilter().compressAsPNG(aBitmapEx, aStream)); + } + } + + void testVerticalText(); + +public: + VclCjkTextTest() + : BootstrapFixture(true, false) + { + } + + CPPUNIT_TEST_SUITE(VclCjkTextTest); + CPPUNIT_TEST(testVerticalText); + CPPUNIT_TEST_SUITE_END(); +}; + +// Similar to getCharacterBaseWidth but this time from the top, for U+30E8 (it's straight at the top, not at the bottom). +static tools::Long getCharacterTopWidth(VirtualDevice* device, const Point& start) +{ + Bitmap bitmap = device->GetBitmap(Point(), device->GetOutputSizePixel()); + BitmapScopedReadAccess access(bitmap); + tools::Long y = start.Y(); + while (y < bitmap.GetSizePixel().Height() && access->GetColor(y, start.X()) != COL_BLACK) + ++y; + if (y >= bitmap.GetSizePixel().Height()) + return -1; + tools::Long xmin = start.X(); + while (xmin >= 0 && access->GetColor(y, xmin) != COL_WHITE) + --xmin; + tools::Long xmax = start.X(); + while (xmax < bitmap.GetSizePixel().Width() && access->GetColor(y, xmax) != COL_WHITE) + ++xmax; + return xmax - xmin + 1; +} + +// The same, but from the right side, for U+30E8 (it's straight on the right side, not the left one). +static tools::Long getCharacterRightSideHeight(VirtualDevice* device, const Point& start) +{ + Bitmap bitmap = device->GetBitmap(Point(), device->GetOutputSizePixel()); + BitmapScopedReadAccess access(bitmap); + tools::Long x = start.X(); + while (x >= 0 && access->GetColor(start.Y(), x) != COL_BLACK) + --x; + if (x < 0) + return -1; + tools::Long ymin = start.Y(); + while (ymin >= 0 && access->GetColor(ymin, x) != COL_WHITE) + --ymin; + tools::Long ymax = start.Y(); + while (ymax < bitmap.GetSizePixel().Width() && access->GetColor(ymax, x) != COL_WHITE) + ++ymax; + return ymax - ymin + 1; +} + +// Like testSimpleText() but for a vertical character, here namely U+30E8 (katakana letter yo), +// chosen because it's a fairly simple shape (looks like horizontally mirrored E) that should +// have the right and top lines being straight. Well, and also chosen because I actually +// do not have much clue about CJK. +// IMPORTANT: If you modify this, modify also the void VclTextTest::testSimpleText(). +void VclCjkTextTest::testVerticalText() +{ + OUString text(u"\x30e8"_ustr); + ScopedVclPtr<VirtualDevice> device = VclPtr<VirtualDevice>::Create(DeviceFormat::WITHOUT_ALPHA); + device->SetOutputSizePixel(Size(100, 100)); + device->SetBackground(Wallpaper(COL_WHITE)); + // Disable AA, to make all pixels be black or white. + device->SetAntialiasing(AntialiasingFlags::DisableText); + + // Bail out on all backends that do not work (or I didn't test). Opt-out rather than opt-in + // to make sure new backends fail initially. + if (device->GetGraphics()->getRenderBackendName() == "qt5" + || device->GetGraphics()->getRenderBackendName() == "qt5svp" + || device->GetGraphics()->getRenderBackendName() == "gtk3svp" + || device->GetGraphics()->getRenderBackendName() == "aqua" + || device->GetGraphics()->getRenderBackendName() == "gen" +#ifdef MACOSX // vertical fonts are broken on Mac with or without Skia + || device->GetGraphics()->getRenderBackendName() == "skia" +#endif + || device->GetGraphics()->getRenderBackendName() == "genpsp") + return; + + // We do not ship any CJK fonts, so try to find a common one that is usable for the test. + vcl::Font baseFont; + vcl::Font font; + bool fontFound = false; + for (const char* ptrfontName : + { "Droid Sans Japanese", "Baekmuk Gulim", "Microsoft JhengHei", "Microsoft YaHei", + "MS PGothic", "Hiragino Sans", "Arial Unicode MS" }) + { + OUString fontName = OUString::fromUtf8(ptrfontName); + if (!device->IsFontAvailable(fontName)) + continue; + baseFont = vcl::Font(fontName, "Book", Size(0, 36)); + baseFont.SetLanguage(LANGUAGE_JAPANESE); + baseFont.SetVertical(true); + baseFont.SetOrientation(2700_deg10); + if (device->HasGlyphs(baseFont, text) == -1) // -1 means no glyph is missing + { + fontFound = true; + break; + } + } + if (!fontFound) + { + SAL_WARN("vcl", + "Could not find a font for VclCjkTextTest::testVerticalText, skipping test."); + return; + } + + font = baseFont; + font.SetFontSize(Size(0, 36)); + device->Erase(); + device->SetFont(font); + device->DrawText(Point(90, 10), text); + exportDevice("vertical-text-36.png", device); + // Height of U+30E8 with font 36 size should be roughly 28 pixels, + // but since we don't know which font will be used, allow even more range. + tools::Long height36 = getCharacterRightSideHeight(device, Point(99, 22)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(tools::Long(28), height36, 6); + tools::Long width36 = getCharacterTopWidth(device, Point(65, 0)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(tools::Long(25), width36, 6); + + // Horizontal writing of vertical glyphs. For some reason in this case + // the font is not set to be vertical. + font.SetOrientation(0_deg10); + font.SetVertical(false); + device->Erase(); + device->SetFont(font); + device->DrawText(Point(10, 10), text); + exportDevice("vertical-text-36-0deg.png", device); + // Here width and height should be the same, since the glyphs actually + // not rotated compared to the vertical writing. + tools::Long height36Rotated = getCharacterRightSideHeight(device, Point(99, 35)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(height36, height36Rotated, 1); + tools::Long width36Rotated = getCharacterTopWidth(device, Point(25, 0)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(width36, width36Rotated, 2); + + font = baseFont; + font.SetFontSize(Size(0, 72)); + device->Erase(); + device->SetFont(font); + device->DrawText(Point(90, 10), text); + exportDevice("vertical-text-72.png", device); + // Font size is doubled, so pixel sizes should also roughly double. + tools::Long height72 = getCharacterRightSideHeight(device, Point(99, 35)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(height36 * 2, height72, 4); + tools::Long width72 = getCharacterTopWidth(device, Point(40, 0)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(width36 * 2, width72, 4); + + font.SetOrientation(0_deg10); + font.SetVertical(false); + device->Erase(); + device->SetFont(font); + device->DrawText(Point(10, 10), text); + exportDevice("vertical-text-72-0deg.png", device); + tools::Long height72Rotated = getCharacterRightSideHeight(device, Point(99, 60)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(height72, height72Rotated, 1); + tools::Long width72Rotated = getCharacterTopWidth(device, Point(45, 0)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(width72, width72Rotated, 1); + + // On Windows scaling of vertical glyphs is broken. + if (device->GetGraphics()->getRenderBackendName() == "gdi") + return; + + // Test width scaled to 200%. + font = baseFont; + font.SetFontSize(Size(72, 36)); +#ifdef _WIN32 + // TODO: What is the proper way to draw 200%-wide text? This is needed on Windows + // but it breaks Linux. + font.SetAverageFontWidth(2 * font.GetOrCalculateAverageFontWidth()); +#endif + device->Erase(); + device->SetFont(font); + device->DrawText(Point(90, 10), text); + // Double "width" with vertical text makes the height doubled. + exportDevice("vertical-text-36-200pct.png", device); + tools::Long height36pct200 = getCharacterRightSideHeight(device, Point(99, 35)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(height36 * 2, height36pct200, 4); + tools::Long width36pct200 = getCharacterTopWidth(device, Point(65, 0)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(width36, width36pct200, 2); + + // Test width scaled to 50%. + font = baseFont; + font.SetFontSize(Size(18, 36)); +#ifdef _WIN32 + font.SetAverageFontWidth(0.5 * font.GetOrCalculateAverageFontWidth()); +#endif + device->Erase(); + device->SetFont(font); + device->DrawText(Point(90, 10), text); + exportDevice("vertical-text-36-50pct.png", device); + tools::Long height36pct50 = getCharacterRightSideHeight(device, Point(99, 16)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(height36 / 2, height36pct50, 2); + tools::Long width36pct50 = getCharacterTopWidth(device, Point(65, 0)); + CPPUNIT_ASSERT_DOUBLES_EQUAL(width36, width36pct50, 2); +} + +CPPUNIT_TEST_SUITE_REGISTRATION(VclCjkTextTest); + +CPPUNIT_PLUGIN_IMPLEMENT(); + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |