include/vcl/graphicfilter.hxx | 8 +++
vcl/qa/cppunit/GraphicTest.cxx | 55 ++++++++++++++++++++++----
vcl/source/filter/graphicfilter2.cxx | 72 ++++++++++++++++++++---------------
vcl/source/gdi/impgraph.cxx | 19 +++++----
4 files changed, 109 insertions(+), 45 deletions(-)
New commits:
commit cd5e86eba163cab14e1d4149dde4513fbe252340
Author: Luke Deller <l...@deller.id.au>
AuthorDate: Thu Oct 31 01:36:22 2019 +1100
Commit: Miklos Vajna <vmik...@collabora.com>
CommitDate: Fri Nov 8 09:20:17 2019 +0100
tdf#118036 Fix IsTransparent for unloaded graphics
Squashed two commits from master:
[348460ec37b1] Fix IsTransparent() for unloaded graphics
[d93740559872] Fix use of uninitialised variable
Change-Id: I1753c0d11491f1dc518e23da8d7b3842945770cb
Reviewed-on: https://gerrit.libreoffice.org/81959
Tested-by: Jenkins
Tested-by: Xisco Faulí <xiscofa...@libreoffice.org>
Reviewed-by: Miklos Vajna <vmik...@collabora.com>
diff --git a/include/vcl/graphicfilter.hxx b/include/vcl/graphicfilter.hxx
index 69fbc215ba77..88f6a7417f02 100644
--- a/include/vcl/graphicfilter.hxx
+++ b/include/vcl/graphicfilter.hxx
@@ -145,6 +145,8 @@ class VCL_DLLPUBLIC GraphicDescriptor final
GraphicFileFormat nFormat;
bool const bOwnStream;
sal_uInt8 mnNumberOfImageComponents;
+ bool bIsTransparent;
+ bool bIsAlpha;
void ImpConstruct();
@@ -214,6 +216,12 @@ public:
/** @return number of color channels */
sal_uInt8 GetNumberOfImageComponents() const { return
mnNumberOfImageComponents; }
+ /** @return whether image supports transparency */
+ bool IsTransparent() const { return bIsTransparent; }
+
+ /** @return whether image supports alpha values for translucent colours */
+ bool IsAlpha() const { return bIsAlpha; }
+
/** @return filter number that is needed by the GraphFilter to read this
format */
static OUString GetImportFormatShortName( GraphicFileFormat nFormat );
};
diff --git a/vcl/qa/cppunit/GraphicTest.cxx b/vcl/qa/cppunit/GraphicTest.cxx
index d094da3ca957..c9593434674b 100644
--- a/vcl/qa/cppunit/GraphicTest.cxx
+++ b/vcl/qa/cppunit/GraphicTest.cxx
@@ -29,25 +29,40 @@ class GraphicTest : public CppUnit::TestFixture
void testUnloadedGraphic();
void testUnloadedGraphicLoading();
void testUnloadedGraphicWmf();
+ void testUnloadedGraphicAlpha();
CPPUNIT_TEST_SUITE(GraphicTest);
CPPUNIT_TEST(testUnloadedGraphic);
CPPUNIT_TEST(testUnloadedGraphicLoading);
CPPUNIT_TEST(testUnloadedGraphicWmf);
+ CPPUNIT_TEST(testUnloadedGraphicAlpha);
CPPUNIT_TEST_SUITE_END();
};
-BitmapEx createBitmap()
+BitmapEx createBitmap(bool alpha = false)
{
- Bitmap aBitmap(Size(100, 100), 24);
+ Bitmap aBitmap(Size(120, 100), 24);
aBitmap.Erase(COL_LIGHTRED);
- return BitmapEx(aBitmap);
+ aBitmap.SetPrefSize(Size(6000, 5000));
+ aBitmap.SetPrefMapMode(MapMode(MapUnit::Map100thMM));
+
+ if (alpha)
+ {
+ sal_uInt8 uAlphaValue = 0x80;
+ AlphaMask aAlphaMask(Size(120, 100), &uAlphaValue);
+
+ return BitmapEx(aBitmap, aAlphaMask);
+ }
+ else
+ {
+ return BitmapEx(aBitmap);
+ }
}
-void createBitmapAndExportForType(SvStream& rStream, OUString const& sType)
+void createBitmapAndExportForType(SvStream& rStream, OUString const& sType,
bool alpha)
{
- BitmapEx aBitmapEx = createBitmap();
+ BitmapEx aBitmapEx = createBitmap(alpha);
uno::Sequence<beans::PropertyValue> aFilterData;
GraphicFilter& rGraphicFilter = GraphicFilter::GetGraphicFilter();
@@ -57,11 +72,11 @@ void createBitmapAndExportForType(SvStream& rStream,
OUString const& sType)
rStream.Seek(STREAM_SEEK_TO_BEGIN);
}
-Graphic makeUnloadedGraphic(OUString const& sType)
+Graphic makeUnloadedGraphic(OUString const& sType, bool alpha = false)
{
SvMemoryStream aStream;
GraphicFilter& rGraphicFilter = GraphicFilter::GetGraphicFilter();
- createBitmapAndExportForType(aStream, sType);
+ createBitmapAndExportForType(aStream, sType, alpha);
return rGraphicFilter.ImportUnloadedGraphic(aStream);
}
@@ -82,10 +97,15 @@ void GraphicTest::testUnloadedGraphic()
// check GetSizePixel doesn't load graphic
aGraphic = makeUnloadedGraphic("png");
CPPUNIT_ASSERT_EQUAL(false, aGraphic.isAvailable());
- CPPUNIT_ASSERT_EQUAL(100L, aGraphic.GetSizePixel().Width());
+ CPPUNIT_ASSERT_EQUAL(120L, aGraphic.GetSizePixel().Width());
CPPUNIT_ASSERT_EQUAL(100L, aGraphic.GetSizePixel().Height());
CPPUNIT_ASSERT_EQUAL(false, aGraphic.isAvailable());
+ // check GetPrefSize doesn't load graphic
+ CPPUNIT_ASSERT_EQUAL(6000L, aGraphic.GetPrefSize().Width());
+ CPPUNIT_ASSERT_EQUAL(5000L, aGraphic.GetPrefSize().Height());
+ CPPUNIT_ASSERT_EQUAL(false, aGraphic.isAvailable());
+
// check GetSizeBytes loads graphic
CPPUNIT_ASSERT_EQUAL(false, aGraphic.isAvailable());
CPPUNIT_ASSERT(aGraphic.GetSizeBytes() > 0);
@@ -102,7 +122,7 @@ void GraphicTest::testUnloadedGraphicLoading()
// check available
CPPUNIT_ASSERT_EQUAL(false, aGraphic.isAvailable());
- CPPUNIT_ASSERT_EQUAL(100L, aGraphic.GetSizePixel().Width());
+ CPPUNIT_ASSERT_EQUAL(120L, aGraphic.GetSizePixel().Width());
CPPUNIT_ASSERT_EQUAL(100L, aGraphic.GetSizePixel().Height());
CPPUNIT_ASSERT_EQUAL(false, aGraphic.isAvailable());
CPPUNIT_ASSERT(aGraphic.GetSizeBytes() > 0);
@@ -158,6 +178,23 @@ void GraphicTest::testUnloadedGraphicWmf()
CPPUNIT_ASSERT_EQUAL(Size(42, 42), aGraphic.GetPrefSize());
}
+void GraphicTest::testUnloadedGraphicAlpha()
+{
+ // make unloaded test graphic with alpha
+ Graphic aGraphic = makeUnloadedGraphic("png", true);
+
+ CPPUNIT_ASSERT_EQUAL(true, aGraphic.IsAlpha());
+ CPPUNIT_ASSERT_EQUAL(true, aGraphic.IsTransparent());
+ CPPUNIT_ASSERT_EQUAL(false, aGraphic.isAvailable());
+
+ // make unloaded test graphic without alpha
+ aGraphic = makeUnloadedGraphic("png", false);
+
+ CPPUNIT_ASSERT_EQUAL(false, aGraphic.IsAlpha());
+ CPPUNIT_ASSERT_EQUAL(false, aGraphic.IsTransparent());
+ CPPUNIT_ASSERT_EQUAL(false, aGraphic.isAvailable());
+}
+
} // namespace
CPPUNIT_TEST_SUITE_REGISTRATION(GraphicTest);
diff --git a/vcl/source/filter/graphicfilter2.cxx
b/vcl/source/filter/graphicfilter2.cxx
index 8839807aa962..2b0230165e05 100644
--- a/vcl/source/filter/graphicfilter2.cxx
+++ b/vcl/source/filter/graphicfilter2.cxx
@@ -98,6 +98,8 @@ void GraphicDescriptor::ImpConstruct()
nBitsPerPixel = 0;
nPlanes = 0;
mnNumberOfImageComponents = 0;
+ bIsTransparent = false;
+ bIsAlpha = false;
}
bool GraphicDescriptor::ImpDetectBMP( SvStream& rStm, bool bExtendedInfo )
@@ -547,6 +549,11 @@ bool GraphicDescriptor::ImpDetectPNG( SvStream& rStm, bool
bExtendedInfo )
rStm.ReadUChar( cByte );
nBitsPerPixel = cByte;
+ // Colour type - check whether it supports alpha values
+ sal_uInt8 cColType = 0;
+ rStm.ReadUChar( cColType );
+ bIsAlpha = bIsTransparent = ( cColType == 4 || cColType == 6 );
+
// Planes always 1;
// compression always
nPlanes = 1;
@@ -554,46 +561,53 @@ bool GraphicDescriptor::ImpDetectPNG( SvStream& rStm,
bool bExtendedInfo )
sal_uInt32 nLen32 = 0;
nTemp32 = 0;
- rStm.SeekRel( 8 );
+ rStm.SeekRel( 7 );
- // read up to the pHYs-Chunk or the start of the image
+ // read up to the start of the image
rStm.ReadUInt32( nLen32 );
rStm.ReadUInt32( nTemp32 );
- while( ( nTemp32 != 0x70485973 ) && ( nTemp32 != 0x49444154 )
- && rStm.good() )
+ while( ( nTemp32 != 0x49444154 ) && rStm.good() )
{
- rStm.SeekRel( 4 + nLen32 );
- rStm.ReadUInt32( nLen32 );
- rStm.ReadUInt32( nTemp32 );
- }
+ if ( nTemp32 == 0x70485973 ) // physical pixel dimensions
+ {
+ sal_uLong nXRes;
+ sal_uLong nYRes;
- if (nTemp32 == 0x70485973 && rStm.good())
- {
- sal_uLong nXRes;
- sal_uLong nYRes;
+ // horizontal resolution
+ nTemp32 = 0;
+ rStm.ReadUInt32( nTemp32 );
+ nXRes = nTemp32;
- // horizontal resolution
- nTemp32 = 0;
- rStm.ReadUInt32( nTemp32 );
- nXRes = nTemp32;
+ // vertical resolution
+ nTemp32 = 0;
+ rStm.ReadUInt32( nTemp32 );
+ nYRes = nTemp32;
- // vertical resolution
- nTemp32 = 0;
- rStm.ReadUInt32( nTemp32 );
- nYRes = nTemp32;
+ // unit
+ cByte = 0;
+ rStm.ReadUChar( cByte );
- // unit
- cByte = 0;
- rStm.ReadUChar( cByte );
+ if ( cByte )
+ {
+ if ( nXRes )
+ aLogSize.setWidth( (aPixSize.Width() * 100000)
/ nXRes );
- if ( cByte )
- {
- if ( nXRes )
- aLogSize.setWidth( (aPixSize.Width() * 100000) /
nXRes );
+ if ( nYRes )
+ aLogSize.setHeight( (aPixSize.Height() *
100000) / nYRes );
+ }
- if ( nYRes )
- aLogSize.setHeight( (aPixSize.Height() * 100000) /
nYRes );
+ nLen32 -= 9;
+ }
+ else if ( nTemp32 == 0x74524e53 ) // transparency
+ {
+ bIsTransparent = true;
+ bIsAlpha = ( cColType != 0 && cColType != 2 );
}
+
+ // skip forward to next chunk
+ rStm.SeekRel( 4 + nLen32 );
+ rStm.ReadUInt32( nLen32 );
+ rStm.ReadUInt32( nTemp32 );
}
}
}
diff --git a/vcl/source/gdi/impgraph.cxx b/vcl/source/gdi/impgraph.cxx
index 0a7228268876..e15644c9fdc2 100644
--- a/vcl/source/gdi/impgraph.cxx
+++ b/vcl/source/gdi/impgraph.cxx
@@ -535,10 +535,11 @@ void ImpGraphic::ImplSetPrepared(bool bAnimated, Size*
pSizeHint)
maSwapInfo.maPrefSize = *pSizeHint;
maSwapInfo.maPrefMapMode = MapMode(MapUnit::Map100thMM);
}
- else
+
+ GraphicDescriptor aDescriptor(aMemoryStream, nullptr);
+ if (aDescriptor.Detect(true))
{
- GraphicDescriptor aDescriptor(aMemoryStream, nullptr);
- if (aDescriptor.Detect(true))
+ if (!pSizeHint)
{
// If we have logic size, work with that, as later pixel -> logic
// conversion will work with the output device DPI, not the graphic
@@ -554,14 +555,18 @@ void ImpGraphic::ImplSetPrepared(bool bAnimated, Size*
pSizeHint)
maSwapInfo.maPrefSize = aDescriptor.GetSizePixel();
maSwapInfo.maPrefMapMode = MapMode(MapUnit::MapPixel);
}
-
- maSwapInfo.maSizePixel = aDescriptor.GetSizePixel();
}
+
+ maSwapInfo.maSizePixel = aDescriptor.GetSizePixel();
+ maSwapInfo.mbIsTransparent = aDescriptor.IsTransparent();
+ maSwapInfo.mbIsAlpha = aDescriptor.IsAlpha();
+ } else {
+ maSwapInfo.mbIsTransparent = false;
+ maSwapInfo.mbIsAlpha = false;
}
+
maSwapInfo.mnAnimationLoopCount = 0;
maSwapInfo.mbIsEPS = false;
- maSwapInfo.mbIsTransparent = false;
- maSwapInfo.mbIsAlpha = false;
maSwapInfo.mbIsAnimated = bAnimated;
}
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