[Libreoffice-commits] core.git: vcl/qa

[offtkp (via logerrit)]

 vcl/qa/cppunit/png/PngFilterTest.cxx | 1445 +++++++++++++++++++++++++++++++++++
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 vcl/qa/cppunit/png/data/z06n2c08.png |binary
 vcl/qa/cppunit/png/data/z09n2c08.png |binary
 173 files changed, 1445 insertions(+)

New commits:
commit 4347a032d34497f324a944629dfb49702cb3c54c
Author:     offtkp <parisop...@gmail.com>
AuthorDate: Fri Jun 24 11:42:26 2022 +0300
Commit:     Tomaž Vajngerl <qui...@gmail.com>
CommitDate: Tue Jul 19 09:57:50 2022 +0200

    Add PngSuite .png test files and test function
    
    Add testPngSuite function that tests the PngSuite files against width
    and height, bit depth, whether it's paletted or if it has alpha
    
    To be used with the new pngreader/writer to
    verify that it was implemented correctly
    
    Change-Id: Ic334df36735fabcde71ecec7fbf463e255b06d4b
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/136359
    Tested-by: Jenkins
    Reviewed-by: Tomaž Vajngerl <qui...@gmail.com>

diff --git a/vcl/qa/cppunit/png/PngFilterTest.cxx 
b/vcl/qa/cppunit/png/PngFilterTest.cxx
index 727f86c9476b..81531f21b0e6 100644
--- a/vcl/qa/cppunit/png/PngFilterTest.cxx
+++ b/vcl/qa/cppunit/png/PngFilterTest.cxx
@@ -33,6 +33,122 @@
 
 using namespace css;
 
+namespace
+{
+struct Case
+{
+    tools::Long mnWidth;
+    tools::Long mnHeight;
+    sal_uInt16 mnBpp;
+    bool mbHasPalette;
+    bool mbIsAlpha;
+};
+// Checks that a pngs BitmapEx is the same after reading and
+// after writing. Takes a vector of function pointers if there's need to test
+// special cases
+void checkImportExportPng(const OUString& sFilePath, const Case& aCase)
+{
+    SvFileStream aFileStream(sFilePath, StreamMode::READ);
+    SvMemoryStream aExportStream;
+    BitmapEx aImportedBitmapEx;
+    BitmapEx aExportedImportedBitmapEx;
+
+    bool bOpenOk = !aFileStream.GetError() && aFileStream.GetBufferSize() > 0;
+    CPPUNIT_ASSERT_MESSAGE(OString("Failed to open file: " + 
sFilePath.toUtf8()).getStr(), bOpenOk);
+
+    // Read the png from the file
+    {
+        vcl::PngImageReader aPngReader(aFileStream);
+        bool bReadOk = aPngReader.read(aImportedBitmapEx);
+        CPPUNIT_ASSERT_MESSAGE(OString("Failed to read png from: " + 
sFilePath.toUtf8()).getStr(),
+                               bReadOk);
+        Bitmap aImportedBitmap = aImportedBitmapEx.GetBitmap();
+        Bitmap::ScopedInfoAccess pAccess(aImportedBitmap);
+        auto nActualWidth = aImportedBitmapEx.GetSizePixel().Width();
+        auto nActualHeight = aImportedBitmapEx.GetSizePixel().Height();
+        auto nActualBpp = 
vcl::pixelFormatBitCount(aImportedBitmapEx.GetBitmap().getPixelFormat());
+        auto bActualHasPalette = pAccess->HasPalette();
+        auto bActualIsAlpha = aImportedBitmapEx.IsAlpha();
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("Width comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mnWidth, nActualWidth);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("Height comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mnHeight, nActualHeight);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("Bpp comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mnBpp, nActualBpp);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("HasPalette comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mbHasPalette, bActualHasPalette);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("IsAlpha comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mbIsAlpha, bActualIsAlpha);
+    }
+
+    // Write the imported png to a stream
+    {
+        vcl::PngImageWriter aPngWriter(aExportStream);
+        bool bWriteOk = aPngWriter.write(aImportedBitmapEx);
+        CPPUNIT_ASSERT_MESSAGE(OString("Failed to write png: " + 
sFilePath.toUtf8()).getStr(),
+                               bWriteOk);
+        aExportStream.Seek(0);
+    }
+
+    // Read the png again from the exported stream
+    {
+        vcl::PngImageReader aPngReader(aExportStream);
+        bool bReadOk = aPngReader.read(aExportedImportedBitmapEx);
+        CPPUNIT_ASSERT_MESSAGE(
+            OString("Failed to read exported png: " + 
sFilePath.toUtf8()).getStr(), bReadOk);
+        Bitmap aExportedImportedBitmap = aExportedImportedBitmapEx.GetBitmap();
+        Bitmap::ScopedInfoAccess pAccess(aExportedImportedBitmap);
+        auto nActualWidth = aExportedImportedBitmapEx.GetSizePixel().Width();
+        auto nActualHeight = aExportedImportedBitmapEx.GetSizePixel().Height();
+        auto nActualBpp
+            = 
vcl::pixelFormatBitCount(aExportedImportedBitmapEx.GetBitmap().getPixelFormat());
+        auto bActualHasPalette = pAccess->HasPalette();
+        auto bActualIsAlpha = aExportedImportedBitmapEx.IsAlpha();
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("Width comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mnWidth, nActualWidth);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("Height comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mnHeight, nActualHeight);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("Bpp comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mnBpp, nActualBpp);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("HasPalette comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mbHasPalette, bActualHasPalette);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE(
+            OString("IsAlpha comparison failed for exported png:" + 
sFilePath.toUtf8()).getStr(),
+            aCase.mbIsAlpha, bActualIsAlpha);
+    }
+
+    // Compare imported and exported BitmapEx
+    // This compares size, inner bitmap and alpha mask
+    bool bIsSame = (aExportedImportedBitmapEx == aImportedBitmapEx);
+    CPPUNIT_ASSERT_MESSAGE(
+        OString("Import->Export png test failed for png: " + 
sFilePath.toUtf8()).getStr(), bIsSame);
+}
+
+// Checks that aPngReader.read returns false on corrupted files
+void checkImportCorruptedPng(const OUString& sFilePath)
+{
+    SvFileStream aFileStream(sFilePath, StreamMode::READ);
+    BitmapEx aImportedBitmapEx;
+
+    bool bOpenOk = !aFileStream.GetError() && aFileStream.GetBufferSize() > 0;
+    CPPUNIT_ASSERT_MESSAGE(OString("Failed to open file: " + 
sFilePath.toUtf8()).getStr(), bOpenOk);
+    vcl::PngImageReader aPngReader(aFileStream);
+    bool bReadOk = aPngReader.read(aImportedBitmapEx);
+    // Make sure this file was not read successfully
+    CPPUNIT_ASSERT_MESSAGE(
+        OString("Corrupted png should not be opened: " + 
sFilePath.toUtf8()).getStr(), !bReadOk);
+}
+}
+
 class PngFilterTest : public test::BootstrapFixture
 {
     // Should keep the temp files (should be false)
@@ -53,6 +169,7 @@ public:
     }
 
     void testPng();
+    void testPngSuite();
     void testMsGifInPng();
     void testPngRoundtrip8BitGrey();
     void testPngRoundtrip24();
@@ -61,6 +178,7 @@ public:
 
     CPPUNIT_TEST_SUITE(PngFilterTest);
     CPPUNIT_TEST(testPng);
+    CPPUNIT_TEST(testPngSuite);
     CPPUNIT_TEST(testMsGifInPng);
     CPPUNIT_TEST(testPngRoundtrip8BitGrey);
     CPPUNIT_TEST(testPngRoundtrip24);
@@ -245,6 +363,1333 @@ void PngFilterTest::testPng()
     }
 }
 
+void PngFilterTest::testPngSuite()
+{
+    // Test the PngSuite test files by Willem van Schaik
+    // filename:                               g04i2c08.png
+    //                                         || ||||
+    // test feature (in this case gamma) ------+| ||||
+    // parameter of test (here gamma-value) ----+ ||||
+    // interlaced or non-interlaced --------------+|||
+    // color-type (numerical) ---------------------+||
+    // color-type (descriptive) --------------------+|
+    // bit-depth ------------------------------------+
+
+    // Some notes about the cases:
+    // - RGB palette PNGs get converted to a bitmap with png_set_palette_to_rgb
+    // - Grayscale PNGs with alpha also do with png_set_gray_to_rgb
+    // - Grayscale PNGs without alpha use BitmapEx palette utilities
+    // - 1, 2, 4 bit grayscale w/o alpha gets converted to 8 bit with 
png_set_expand_gray_1_2_4_to_8
+    // - 16 bit per channel gets converted to 8 bit per channel with 
png_set_scale_16
+    // - PNGs that are not size related have size 32x32
+    // - Internally BitmapEx is never 32 bpp, instead it's 24 bpp (rgb) and 
uses an 8 bpp alpha mask
+    std::pair<std::u16string_view, Case> aCases[] = {
+        // Basic formats, not interlaced
+        { u"basn0g01.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // b&w
+        { u"basn0g02.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // 2 bit grayscale
+        { u"basn0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // 4 bit grayscale
+        { u"basn0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // 8 bit grayscale
+        { u"basn0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // 16 bit grayscale
+        { u"basn2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 8 bit rgb
+        { u"basn2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 16 bit rgb
+        { u"basn3p01.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 1 bit palette
+        { u"basn3p02.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 2 bit palette
+        { u"basn3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 4 bit palette
+        { u"basn3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 8 bit palette
+        { u"basn4a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 8 bit grayscale + 8 bit alpha
+        { u"basn4a16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 16 bit grayscale + 16 bit alpha
+        { u"basn6a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 8 bit rgba
+        { u"basn6a16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 16 bit rgba
+        // Basic formats, interlaced
+        { u"basi0g01.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // b&w
+        { u"basi0g02.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // 2 bit grayscale
+        { u"basi0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // 4 bit grayscale
+        { u"basi0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // 8 bit grayscale
+        { u"basi0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // 16 bit grayscale
+        { u"basi2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 8 bit rgb
+        { u"basi2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 16 bit rgb
+        { u"basi3p01.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 1 bit palette
+        { u"basi3p02.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 2 bit palette
+        { u"basi3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 4 bit palette
+        { u"basi3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 8 bit palette
+        { u"basi4a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 8 bit grayscale + 8 bit alpha
+        { u"basi4a16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 16 bit grayscale + 16 bit alpha
+        { u"basi6a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 8 bit rgba
+        { u"basi6a16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 16 bit rgba
+        // // Odd sizes, not interlaced
+        { u"s01n3p01.png",
+          {
+              1,
+              1,
+              24,
+              false,
+              false,
+          } }, // 1x1
+        { u"s02n3p01.png",
+          {
+              2,
+              2,
+              24,
+              false,
+              false,
+          } }, // 2x2
+        { u"s03n3p01.png",
+          {
+              3,
+              3,
+              24,
+              false,
+              false,
+          } }, // 3x3
+        { u"s04n3p01.png",
+          {
+              4,
+              4,
+              24,
+              false,
+              false,
+          } }, // 4x4
+        { u"s05n3p02.png",
+          {
+              5,
+              5,
+              24,
+              false,
+              false,
+          } }, // 5x5
+        { u"s06n3p02.png",
+          {
+              6,
+              6,
+              24,
+              false,
+              false,
+          } }, // 6x6
+        { u"s07n3p02.png",
+          {
+              7,
+              7,
+              24,
+              false,
+              false,
+          } }, // 7x7
+        { u"s08n3p02.png",
+          {
+              8,
+              8,
+              24,
+              false,
+              false,
+          } }, // 8x8
+        { u"s09n3p02.png",
+          {
+              9,
+              9,
+              24,
+              false,
+              false,
+          } }, // 9x9
+        { u"s32n3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 32x32
+        { u"s33n3p04.png",
+          {
+              33,
+              33,
+              24,
+              false,
+              false,
+          } }, // 33x33
+        { u"s34n3p04.png",
+          {
+              34,
+              34,
+              24,
+              false,
+              false,
+          } }, // 34x34
+        { u"s35n3p04.png",
+          {
+              35,
+              35,
+              24,
+              false,
+              false,
+          } }, // 35x35
+        { u"s36n3p04.png",
+          {
+              36,
+              36,
+              24,
+              false,
+              false,
+          } }, // 36x36
+        { u"s37n3p04.png",
+          {
+              37,
+              37,
+              24,
+              false,
+              false,
+          } }, // 37x37
+        { u"s38n3p04.png",
+          {
+              38,
+              38,
+              24,
+              false,
+              false,
+          } }, // 38x38
+        { u"s39n3p04.png",
+          {
+              39,
+              39,
+              24,
+              false,
+              false,
+          } }, // 39x39
+        { u"s40n3p04.png",
+          {
+              40,
+              40,
+              24,
+              false,
+              false,
+          } }, // 40x40
+        // // Odd sizes, interlaced
+        { u"s01i3p01.png",
+          {
+              1,
+              1,
+              24,
+              false,
+              false,
+          } }, // 1x1
+        { u"s02i3p01.png",
+          {
+              2,
+              2,
+              24,
+              false,
+              false,
+          } }, // 2x2
+        { u"s03i3p01.png",
+          {
+              3,
+              3,
+              24,
+              false,
+              false,
+          } }, // 3x3
+        { u"s04i3p01.png",
+          {
+              4,
+              4,
+              24,
+              false,
+              false,
+          } }, // 4x4
+        { u"s05i3p02.png",
+          {
+              5,
+              5,
+              24,
+              false,
+              false,
+          } }, // 5x5
+        { u"s06i3p02.png",
+          {
+              6,
+              6,
+              24,
+              false,
+              false,
+          } }, // 6x6
+        { u"s07i3p02.png",
+          {
+              7,
+              7,
+              24,
+              false,
+              false,
+          } }, // 7x7
+        { u"s08i3p02.png",
+          {
+              8,
+              8,
+              24,
+              false,
+              false,
+          } }, // 8x8
+        { u"s09i3p02.png",
+          {
+              9,
+              9,
+              24,
+              false,
+              false,
+          } }, // 9x9
+        { u"s32i3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // 32x32
+        { u"s33i3p04.png",
+          {
+              33,
+              33,
+              24,
+              false,
+              false,
+          } }, // 33x33
+        { u"s34i3p04.png",
+          {
+              34,
+              34,
+              24,
+              false,
+              false,
+          } }, // 34x34
+        { u"s35i3p04.png",
+          {
+              35,
+              35,
+              24,
+              false,
+              false,
+          } }, // 35x35
+        { u"s36i3p04.png",
+          {
+              36,
+              36,
+              24,
+              false,
+              false,
+          } }, // 36x36
+        { u"s37i3p04.png",
+          {
+              37,
+              37,
+              24,
+              false,
+              false,
+          } }, // 37x37
+        { u"s38i3p04.png",
+          {
+              38,
+              38,
+              24,
+              false,
+              false,
+          } }, // 38x38
+        { u"s39i3p04.png",
+          {
+              39,
+              39,
+              24,
+              false,
+              false,
+          } }, // 39x39
+        { u"s40i3p04.png",
+          {
+              40,
+              40,
+              24,
+              false,
+              false,
+          } }, // 40x40
+        // Background colors
+        { u"bgai4a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 8 bit grayscale alpha no background chunk, interlaced
+        { u"bgai4a16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 16 bit grayscale alpha no background chunk, interlaced
+        { u"bgan6a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 3 * 8 bits rgb color alpha, no background chunk
+        { u"bgan6a16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 3 * 16 bits rgb color alpha, no background chunk
+        { u"bgbn4a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 8 bit grayscale alpha, black background chunk
+        { u"bggn4a16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 16 bit grayscale alpha, gray background chunk
+        { u"bgwn6a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 3 * 8 bits rgb color alpha, white background chunk
+        { u"bgyn6a16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // 3 * 16 bits rgb color alpha, yellow background chunk
+        // Transparency
+        { u"tbbn0g04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, black background chunk
+        { u"tbbn2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, blue background chunk
+        { u"tbbn3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, black background chunk
+        { u"tbgn2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, green background chunk
+        { u"tbgn3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, light-gray background chunk
+        { u"tbrn2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, red background chunk
+        { u"tbwn0g16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, white background chunk
+        { u"tbwn3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, white background chunk
+        { u"tbyn3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, yellow background chunk
+        { u"tp1n3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // transparent, but no background chunk
+        { u"tm3n3p02.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // multiple levels of transparency, 3 entries
+        // Gamma
+        { u"g03n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale, file-gamma = 0.35
+        { u"g03n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, file-gamma = 0.35
+        { u"g03n3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, file-gamma = 0.35
+        { u"g04n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale, file-gamma = 0.45
+        { u"g04n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, file-gamma = 0.45
+        { u"g04n3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, file-gamma = 0.45
+        { u"g05n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale, file-gamma = 0.55
+        { u"g05n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, file-gamma = 0.55
+        { u"g05n3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, file-gamma = 0.55
+        { u"g07n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale, file-gamma = 0.70
+        { u"g07n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, file-gamma = 0.70
+        { u"g07n3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, file-gamma = 0.70
+        { u"g10n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale, file-gamma = 1.00
+        { u"g10n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, file-gamma = 1.00
+        { u"g10n3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, file-gamma = 1.00
+        { u"g25n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale, file-gamma = 2.50
+        { u"g25n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, file-gamma = 2.50
+        { u"g25n3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, file-gamma = 2.50
+        // Image filtering
+        { u"f00n0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale no interlacing, filter-type 0
+        { u"f00n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, filter-type 0
+        { u"f01n0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale no interlacing, filter-type 1
+        { u"f01n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, filter-type 1
+        { u"f02n0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale no interlacing, filter-type 2
+        { u"f02n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, filter-type 2
+        { u"f03n0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale no interlacing, filter-type 3
+        { u"f03n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, filter-type 3
+        { u"f04n0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale no interlacing, filter-type 4
+        { u"f04n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, filter-type 4
+        { u"f99n0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale bit-depth 4, filter changing per scanline
+        // Additional palettes
+        { u"pp0n2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // six-cube palette-chunk in true-color image
+        { u"pp0n6a08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              true,
+          } }, // six-cube palette-chunk in true-color+alpha image
+        { u"ps1n0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // six-cube suggested palette (1 byte) in grayscale image
+        { u"ps1n2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // six-cube suggested palette (1 byte) in true-color image
+        { u"ps2n0g08.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // six-cube suggested palette (2 bytes) in grayscale image
+        { u"ps2n2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // six-cube suggested palette (2 bytes) in true-color image
+        // Ancillary chunks
+        { u"ccwn2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // chroma chunk w:0.31270.329 r:0.640.33 g:0.300.60 b:0.15,0.06
+        { u"ccwn3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // chroma chunk w:0.31270.329 r:0.640.33 g:0.300.60 b:0.15,0.06
+        { u"cdfn2c08.png",
+          {
+              8,
+              32,
+              24,
+              false,
+              false,
+          } }, // physical pixel dimensions, 8x32 flat pixels
+        { u"cdhn2c08.png",
+          {
+              32,
+              8,
+              24,
+              false,
+              false,
+          } }, // physical pixel dimensions, 32x8 high pixels
+        { u"cdsn2c08.png",
+          {
+              8,
+              8,
+              24,
+              false,
+              false,
+          } }, // physical pixel dimensions, 8x8 square pixels
+        { u"cdun2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // physical pixel dimensions, 1000 pixels per 1 meter
+        { u"ch1n3p04.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // histogram 15 colors
+        { u"ch2n3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // histogram 256 colors
+        { u"cm0n0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale modification time, 01-jan-2000 12:34:56
+        { u"cm7n0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale modification time, 01-jan-1970 00:00:00
+        { u"cm9n0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale modification time, 31-dec-1999 23:59:59
+        { u"cs3n2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, 13 significant bits
+        { u"cs3n3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, 3 significant bits
+        { u"cs5n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, 5 significant bits
+        { u"cs5n3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, 5 significant bits
+        { u"cs8n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color, 8 significant bits (reference)
+        { u"cs8n3p08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // paletted, 8 significant bits (reference)
+        { u"ct0n0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale no textual data
+        { u"ct1n0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale with textual data
+        { u"ctzn0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale with compressed textual data
+        { u"cten0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale international UTF-8, english
+        { u"ctfn0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale international UTF-8, finnish
+        { u"ctgn0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale international UTF-8, greek
+        { u"cthn0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale international UTF-8, hindi
+        { u"ctjn0g04.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale international UTF-8, japanese
+        { u"exif2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // chunk with jpeg exif data
+        // Chunk ordering
+        { u"oi1n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale mother image with 1 idat-chunk
+        { u"oi1n2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color mother image with 1 idat-chunk
+        { u"oi2n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale image with 2 idat-chunks
+        { u"oi2n2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color image with 2 idat-chunks
+        { u"oi4n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale image with 4 unequal sized idat-chunks
+        { u"oi4n2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color image with 4 unequal sized idat-chunks
+        { u"oi9n0g16.png",
+          {
+              32,
+              32,
+              8,
+              true,
+              false,
+          } }, // grayscale image with all idat-chunks length one
+        { u"oi9n2c16.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color image with all idat-chunks length one
+        // Zlib compression
+        { u"z00n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, compression level 0 (none)
+        { u"z03n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, compression level 3
+        { u"z06n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, compression level 6 (default)
+        { u"z09n2c08.png",
+          {
+              32,
+              32,
+              24,
+              false,
+              false,
+          } }, // color no interlacing, compression level 9 (maximum)
+    };
+
+    for (const auto & [ aCaseName, aCase ] : aCases)
+    {
+        checkImportExportPng(getFullUrl(aCaseName), aCase);
+    }
+
+    OUString aCorruptedFilenames[] = {
+        "xs1n0g01.png", // signature byte 1 MSBit reset to zero
+        "xs2n0g01.png", // signature byte 2 is a 'Q'
+        "xs4n0g01.png", // signature byte 4 lowercase
+        "xs7n0g01.png", // 7th byte a space instead of control-Z
+        "xcrn0g04.png", // added cr bytes
+        "xlfn0g04.png", // added lf bytes
+        "xhdn0g08.png", // incorrect IHDR checksum
+        "xc1n0g08.png", // color type 1
+        "xc9n2c08.png", // color type 9
+        "xd0n2c08.png", // bit-depth 0
+        "xd3n2c08.png", // bit-depth 3
+        "xd9n2c08.png", // bit-depth 99
+        "xdtn0g01.png", // missing IDAT chunk
+        "xcsn0g01.png", // incorrect IDAT checksum
+    };
+
+    for (const auto& aFilename : aCorruptedFilenames)
+    {
+        checkImportCorruptedPng(getFullUrl(aFilename));
+    }
+}
+
 void PngFilterTest::testMsGifInPng()
 {
     Graphic aGraphic;
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