Add a test to show FPDFImageObj_GetBitmap() does not handle masks.
Make a copy of testing/resources/pixel/matte.in and the corresponding
generated PDF for use by embedder tests. Add a test to extract the
images from it. Show that they are all the same, even though they are
different when rendered in the PDF.
Bug: pdfium:1554
Change-Id: Iced360086b21c0d93a3baeebb95615546c8e6fa3
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/71094
Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/fpdfsdk/fpdf_edit_embeddertest.cpp b/fpdfsdk/fpdf_edit_embeddertest.cpp
index cffeb7c..8c75afc 100644
--- a/fpdfsdk/fpdf_edit_embeddertest.cpp
+++ b/fpdfsdk/fpdf_edit_embeddertest.cpp
@@ -3241,6 +3241,28 @@
UnloadPage(page);
}
+// TODO(crbug.com/pdfium/1554): Fix FPDFImageObj_GetBitmap() to take /SMask into
+// account, or provide a new API to do that.
+TEST_F(FPDFEditEmbedderTest, ExtractSMaskBitmap) {
+ ASSERT_TRUE(OpenDocument("matte.pdf"));
+ FPDF_PAGE page = LoadPage(0);
+ ASSERT_TRUE(page);
+
+ constexpr int kExpectedObjects = 4;
+ ASSERT_EQ(kExpectedObjects, FPDFPage_CountObjects(page));
+
+ for (int i = 0; i < kExpectedObjects; ++i) {
+ FPDF_PAGEOBJECT obj = FPDFPage_GetObject(page, i);
+ ASSERT_EQ(FPDF_PAGEOBJ_IMAGE, FPDFPageObj_GetType(obj));
+ ScopedFPDFBitmap bitmap(FPDFImageObj_GetBitmap(obj));
+ ASSERT_TRUE(bitmap);
+ EXPECT_EQ(FPDFBitmap_BGR, FPDFBitmap_GetFormat(bitmap.get()));
+ CompareBitmap(bitmap.get(), 50, 50, "46c9a1dbe0b44765ce46017ad629a2fe");
+ }
+
+ UnloadPage(page);
+}
+
TEST_F(FPDFEditEmbedderTest, GetImageData) {
EXPECT_TRUE(OpenDocument("embedded_images.pdf"));
FPDF_PAGE page = LoadPage(0);
diff --git a/testing/resources/matte.in b/testing/resources/matte.in
new file mode 100644
index 0000000..57d8e13
--- /dev/null
+++ b/testing/resources/matte.in
@@ -0,0 +1,172 @@
+{{header}}
+{{object 1 0}} <<
+ /Type /Catalog
+ /Pages 2 0 R
+>>
+endobj
+{{object 2 0}} <<
+ /Type /Pages
+ /Count 1
+ /Kids [3 0 R]
+>>
+endobj
+{{object 3 0}} <<
+ /Type /Page
+ /Parent 2 0 R
+ /MediaBox [0 0 100 150]
+ /Contents [4 0 R]
+ /Resources <<
+ /XObject <<
+ /Mask 5 0 R
+ /NoMask 7 0 R
+ /MaskTooFewComps 9 0 R
+ /MaskTooManyComps 11 0 R
+ >>
+ >>
+>>
+endobj
+{{object 4 0}} <<
+ {{streamlen}}
+>>
+stream
+q
+40 0 0 60 0 0 cm
+/Mask Do
+Q
+q
+40 0 0 60 50 0 cm
+/NoMask Do
+Q
+q
+40 0 0 60 0 90 cm
+/MaskTooFewComps Do
+Q
+q
+40 0 0 60 50 90 cm
+/MaskTooManyComps Do
+Q
+endstream
+endobj
+{{object 5 0}} <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceRGB
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /SMask 6 0 R
+ {{streamlen}}
+>>
+stream
+789cedc2310d00000c03a07f2aaab3ea7bcf03842655555555555555f5bf01cc7818dc
+endstream
+endobj
+{{object 6 0}} <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceGray
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /Matte [0.0 0.2 1]
+ {{streamlen}}
+>>
+stream
+789cabaa1a05a3808e4061148c027a028351300ae809a246c128a027e0020065c9c90d
+endstream
+endobj
+{{object 7 0}} <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceRGB
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /SMask 8 0 R
+ {{streamlen}}
+>>
+stream
+789cedc2310d00000c03a07f2aaab3ea7bcf03842655555555555555f5bf01cc7818dc
+endstream
+endobj
+{{object 8 0}} <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceGray
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ {{streamlen}}
+>>
+stream
+789cabaa1a05a3808e4061148c027a028351300ae809a246c128a027e0020065c9c90d
+endstream
+endobj
+{{object 9 0}} <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceRGB
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /SMask 10 0 R
+ {{streamlen}}
+>>
+stream
+789cedc2310d00000c03a07f2aaab3ea7bcf03842655555555555555f5bf01cc7818dc
+endstream
+endobj
+{{object 10 0}} <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceGray
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /Matte [0.0 0.2]
+ {{streamlen}}
+>>
+stream
+789cabaa1a05a3808e4061148c027a028351300ae809a246c128a027e0020065c9c90d
+endstream
+endobj
+{{object 11 0}} <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceRGB
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /SMask 12 0 R
+ {{streamlen}}
+>>
+stream
+789cedc2310d00000c03a07f2aaab3ea7bcf03842655555555555555f5bf01cc7818dc
+endstream
+endobj
+{{object 12 0}} <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceGray
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /Matte [0.0 0.2 1 0.5]
+ {{streamlen}}
+>>
+stream
+789cabaa1a05a3808e4061148c027a028351300ae809a246c128a027e0020065c9c90d
+endstream
+endobj
+{{xref}}
+{{trailer}}
+{{startxref}}
+%%EOF
diff --git a/testing/resources/matte.pdf b/testing/resources/matte.pdf
new file mode 100644
index 0000000..05d1ecd
--- /dev/null
+++ b/testing/resources/matte.pdf
@@ -0,0 +1,191 @@
+%PDF-1.7
+% ò¤ô
+1 0 obj <<
+ /Type /Catalog
+ /Pages 2 0 R
+>>
+endobj
+2 0 obj <<
+ /Type /Pages
+ /Count 1
+ /Kids [3 0 R]
+>>
+endobj
+3 0 obj <<
+ /Type /Page
+ /Parent 2 0 R
+ /MediaBox [0 0 100 150]
+ /Contents [4 0 R]
+ /Resources <<
+ /XObject <<
+ /Mask 5 0 R
+ /NoMask 7 0 R
+ /MaskTooFewComps 9 0 R
+ /MaskTooManyComps 11 0 R
+ >>
+ >>
+>>
+endobj
+4 0 obj <<
+ /Length 149
+>>
+stream
+q
+40 0 0 60 0 0 cm
+/Mask Do
+Q
+q
+40 0 0 60 50 0 cm
+/NoMask Do
+Q
+q
+40 0 0 60 0 90 cm
+/MaskTooFewComps Do
+Q
+q
+40 0 0 60 50 90 cm
+/MaskTooManyComps Do
+Q
+endstream
+endobj
+5 0 obj <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceRGB
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /SMask 6 0 R
+ /Length 71
+>>
+stream
+789cedc2310d00000c03a07f2aaab3ea7bcf03842655555555555555f5bf01cc7818dc
+endstream
+endobj
+6 0 obj <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceGray
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /Matte [0.0 0.2 1]
+ /Length 71
+>>
+stream
+789cabaa1a05a3808e4061148c027a028351300ae809a246c128a027e0020065c9c90d
+endstream
+endobj
+7 0 obj <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceRGB
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /SMask 8 0 R
+ /Length 71
+>>
+stream
+789cedc2310d00000c03a07f2aaab3ea7bcf03842655555555555555f5bf01cc7818dc
+endstream
+endobj
+8 0 obj <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceGray
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /Length 71
+>>
+stream
+789cabaa1a05a3808e4061148c027a028351300ae809a246c128a027e0020065c9c90d
+endstream
+endobj
+9 0 obj <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceRGB
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /SMask 10 0 R
+ /Length 71
+>>
+stream
+789cedc2310d00000c03a07f2aaab3ea7bcf03842655555555555555f5bf01cc7818dc
+endstream
+endobj
+10 0 obj <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceGray
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /Matte [0.0 0.2]
+ /Length 71
+>>
+stream
+789cabaa1a05a3808e4061148c027a028351300ae809a246c128a027e0020065c9c90d
+endstream
+endobj
+11 0 obj <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceRGB
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /SMask 12 0 R
+ /Length 71
+>>
+stream
+789cedc2310d00000c03a07f2aaab3ea7bcf03842655555555555555f5bf01cc7818dc
+endstream
+endobj
+12 0 obj <<
+ /Type /XObject
+ /Subtype /Image
+ /Width 50
+ /Height 50
+ /BitsPerComponent 8
+ /ColorSpace /DeviceGray
+ /Filter [/ASCIIHexDecode /FlateDecode]
+ /Matte [0.0 0.2 1 0.5]
+ /Length 71
+>>
+stream
+789cabaa1a05a3808e4061148c027a028351300ae809a246c128a027e0020065c9c90d
+endstream
+endobj
+xref
+0 13
+0000000000 65535 f
+0000000015 00000 n
+0000000068 00000 n
+0000000131 00000 n
+0000000370 00000 n
+0000000571 00000 n
+0000000856 00000 n
+0000001148 00000 n
+0000001433 00000 n
+0000001704 00000 n
+0000001990 00000 n
+0000002281 00000 n
+0000002568 00000 n
+trailer <<
+ /Root 1 0 R
+ /Size 13
+>>
+startxref
+2865
+%%EOF
