vcl/qa/cppunit/pdfexport/data/bitmap-scaledown.odt |binary
vcl/qa/cppunit/pdfexport/pdfexport.cxx | 47 ++++++++++++++++++---
vcl/source/outdev/bitmapex.cxx | 10 ----
3 files changed, 41 insertions(+), 16 deletions(-)
New commits:
commit bbd61607433ca5018526f0a4ad0a2ce2a5902396
Author: Miklos Vajna <vmik...@collabora.com>
AuthorDate: Wed Aug 3 09:44:03 2022 +0200
Commit: Miklos Vajna <vmik...@collabora.com>
CommitDate: Mon Aug 15 11:33:36 2022 +0200
tdf#149943 vcl: fix pixelated PDF export and print for a rotated image
The bugdoc has a barcode which looks good in Writer, but it's quite
blurry in the PDF export result.
This is a problem since commit dd4a67084853a030bf4b9f1f85d728620e0604a5
(vcl: avoid downscale && upscale in DrawTransformedBitmapEx(),
2019-10-08), where the motivation was to not downscale a bitmap in case
it has a larger amount of pixels but a smaller logic size. This went
wrong here and resulted in a blurry bitmap for a not so small image.
Fix the problem by mostly reverting the above commit, because it's no
longer necessary: 68549e00d5e23aa22bc974a8151d93cd948444b3 (vcl,
BitmapEx transformed draw: special-case simple rotations, 2019-10-10)
already made sure that the rotation case doesn't use scaling from the
transform.
testTdf128630 has been adapted to pass again (after manually verifying
that the bugdoc export result is still OK), now the bad case there
simply produces a smaller bitmap.
(cherry picked from commit 7c94d7267bc8b5f43185204ab4953c4b188214bf)
Change-Id: Ib28881c129a0cf037a96eecd065e5cadede97051
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/138269
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoff...@gmail.com>
Reviewed-by: Miklos Vajna <vmik...@collabora.com>
diff --git a/vcl/qa/cppunit/pdfexport/data/bitmap-scaledown.odt
b/vcl/qa/cppunit/pdfexport/data/bitmap-scaledown.odt
new file mode 100644
index 000000000000..da9b167fd9d7
Binary files /dev/null and b/vcl/qa/cppunit/pdfexport/data/bitmap-scaledown.odt
differ
diff --git a/vcl/qa/cppunit/pdfexport/pdfexport.cxx
b/vcl/qa/cppunit/pdfexport/pdfexport.cxx
index 353377681cd3..6bfb34251e0d 100644
--- a/vcl/qa/cppunit/pdfexport/pdfexport.cxx
+++ b/vcl/qa/cppunit/pdfexport/pdfexport.cxx
@@ -1513,7 +1513,7 @@ CPPUNIT_TEST_FIXTURE(PdfExportTest, testTdf128630)
// The document has one page.
CPPUNIT_ASSERT_EQUAL(1, pPdfDocument->getPageCount());
- // Assert the aspect ratio of the only bitmap on the page.
+ // Assert the size of the only bitmap on the page.
std::unique_ptr<vcl::pdf::PDFiumPage> pPdfPage =
pPdfDocument->openPage(/*nIndex=*/0);
CPPUNIT_ASSERT(pPdfPage);
int nPageObjectCount = pPdfPage->getObjectCount();
@@ -1526,12 +1526,13 @@ CPPUNIT_TEST_FIXTURE(PdfExportTest, testTdf128630)
std::unique_ptr<vcl::pdf::PDFiumBitmap> pBitmap =
pPageObject->getImageBitmap();
CPPUNIT_ASSERT(pBitmap);
int nWidth = pBitmap->getWidth();
- int nHeight = pBitmap->getHeight();
// Without the accompanying fix in place, this test would have failed
with:
- // assertion failed
- // - Expression: nWidth != nHeight
- // i.e. the bitmap lost its custom aspect ratio during export.
- CPPUNIT_ASSERT(nWidth != nHeight);
+ // - Expected: 466
+ // - Actual : 289
+ // i.e. the rotated + scaled arrow was more thin than it should be.
+ CPPUNIT_ASSERT_EQUAL(466, nWidth);
+ int nHeight = pBitmap->getHeight();
+ CPPUNIT_ASSERT_EQUAL(466, nHeight);
}
}
@@ -3246,6 +3247,40 @@ CPPUNIT_TEST_FIXTURE(PdfExportTest,
testPdfImageEncryption)
// missing encryption.
CPPUNIT_ASSERT_EQUAL(2, pPageObject->getFormObjectCount());
}
+
+CPPUNIT_TEST_FIXTURE(PdfExportTest, testBitmapScaledown)
+{
+ // Given a document with an upscaled and rotated barcode bitmap in it:
+ aMediaDescriptor["FilterName"] <<= OUString("writer_pdf_Export");
+
+ // When saving as PDF:
+ saveAsPDF(u"bitmap-scaledown.odt");
+
+ // Then verify that the bitmap is not downscaled:
+ std::unique_ptr<vcl::pdf::PDFiumDocument> pPdfDocument = parseExport();
+ CPPUNIT_ASSERT(pPdfDocument);
+ CPPUNIT_ASSERT_EQUAL(1, pPdfDocument->getPageCount());
+ std::unique_ptr<vcl::pdf::PDFiumPage> pPdfPage =
pPdfDocument->openPage(/*nIndex=*/0);
+ CPPUNIT_ASSERT(pPdfPage);
+ int nPageObjectCount = pPdfPage->getObjectCount();
+ for (int i = 0; i < nPageObjectCount; ++i)
+ {
+ std::unique_ptr<vcl::pdf::PDFiumPageObject> pPageObject =
pPdfPage->getObject(i);
+ if (pPageObject->getType() != vcl::pdf::PDFPageObjectType::Image)
+ continue;
+
+ std::unique_ptr<vcl::pdf::PDFiumBitmap> pBitmap =
pPageObject->getImageBitmap();
+ CPPUNIT_ASSERT(pBitmap);
+ // In-file sizes: good is 2631x380, bad is 1565x14.
+ int nWidth = pBitmap->getWidth();
+ // Without the accompanying fix in place, this test would have failed
with:
+ // - Expected: 2616
+ // - Actual : 1565
+ // i.e. the bitmap in the pdf result was small enough to be blurry.
+ CPPUNIT_ASSERT_EQUAL(2616, nWidth);
+ }
+}
+
} // end anonymous namespace
CPPUNIT_PLUGIN_IMPLEMENT();
diff --git a/vcl/source/outdev/bitmapex.cxx b/vcl/source/outdev/bitmapex.cxx
index 7855d1ae5613..bf84bb35d963 100644
--- a/vcl/source/outdev/bitmapex.cxx
+++ b/vcl/source/outdev/bitmapex.cxx
@@ -624,19 +624,9 @@ void OutputDevice::DrawTransformedBitmapEx(
aTransformed = BitmapEx(aContent, aMaskBmp);
}
- // Remove scaling from aFulltransform: we transform due to shearing or
rotation, scaling
- // will happen according to aDestSize.
basegfx::B2DVector aFullScale, aFullTranslate;
double fFullRotate, fFullShearX;
aFullTransform.decompose(aFullScale, aFullTranslate, fFullRotate,
fFullShearX);
- // Require positive scaling, negative scaling would loose horizontal or
vertical flip.
- if (aFullScale.getX() > 0 && aFullScale.getY() > 0)
- {
- basegfx::B2DHomMatrix aTransform =
basegfx::utils::createScaleB2DHomMatrix(
- rOriginalSizePixel.getWidth() / aFullScale.getX(),
- rOriginalSizePixel.getHeight() / aFullScale.getY());
- aFullTransform *= aTransform;
- }
double fSourceRatio = 1.0;
if (rOriginalSizePixel.getHeight() != 0)
