From ca89829775fec2968b51fe5abad86bad1b6a277b Mon Sep 17 00:00:00 2001 From: Jane Liu Date: Wed, 16 Aug 2017 11:25:35 -0400 Subject: API and test for retrieving metadata from image objects Added FPDFImageObj_GetImageMetadata() for retriving the image metadata of image objects, including its dimension, DPI, bits per pixel, and colorspace. * Added a corresponding embedder test. Bug=pdfium:677 Change-Id: I4229334d1ac2125b21a46e2e44ea937ea2e94b51 Reviewed-on: https://pdfium-review.googlesource.com/10110 Reviewed-by: Lei Zhang Reviewed-by: dsinclair Commit-Queue: Jane Liu --- fpdfsdk/fpdfedit_embeddertest.cpp | 47 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) (limited to 'fpdfsdk/fpdfedit_embeddertest.cpp') diff --git a/fpdfsdk/fpdfedit_embeddertest.cpp b/fpdfsdk/fpdfedit_embeddertest.cpp index e62ef2149b..6dc177e2b5 100644 --- a/fpdfsdk/fpdfedit_embeddertest.cpp +++ b/fpdfsdk/fpdfedit_embeddertest.cpp @@ -1084,3 +1084,50 @@ TEST_F(FPDFEditEmbeddertest, GetImageFilters) { UnloadPage(page); } + +TEST_F(FPDFEditEmbeddertest, GetImageMetadata) { + ASSERT_TRUE(OpenDocument("embedded_images.pdf")); + FPDF_PAGE page = LoadPage(0); + ASSERT_TRUE(page); + + // Check that getting the metadata of a null object would fail. + FPDF_IMAGEOBJ_METADATA metadata; + EXPECT_FALSE(FPDFImageObj_GetImageMetadata(nullptr, page, &metadata)); + + // Check that receiving the metadata with a null metadata object would fail. + FPDF_PAGEOBJECT obj = FPDFPage_GetObject(page, 35); + EXPECT_FALSE(FPDFImageObj_GetImageMetadata(obj, page, nullptr)); + + // Check that when retrieving an image object's metadata without passing in + // |page|, all values are correct, with the last two being default values. + ASSERT_EQ(FPDF_PAGEOBJ_IMAGE, FPDFPageObj_GetType(obj)); + ASSERT_TRUE(FPDFImageObj_GetImageMetadata(obj, nullptr, &metadata)); + EXPECT_EQ(92u, metadata.width); + EXPECT_EQ(68u, metadata.height); + EXPECT_NEAR(96.000000, metadata.horizontal_dpi, 0.001); + EXPECT_NEAR(96.000000, metadata.vertical_dpi, 0.001); + EXPECT_EQ(0u, metadata.bits_per_pixel); + EXPECT_EQ(FPDF_COLORSPACE_UNKNOWN, metadata.colorspace); + + // Verify the metadata of a bitmap image with indexed colorspace. + ASSERT_TRUE(FPDFImageObj_GetImageMetadata(obj, page, &metadata)); + EXPECT_EQ(92u, metadata.width); + EXPECT_EQ(68u, metadata.height); + EXPECT_NEAR(96.000000, metadata.horizontal_dpi, 0.001); + EXPECT_NEAR(96.000000, metadata.vertical_dpi, 0.001); + EXPECT_EQ(1u, metadata.bits_per_pixel); + EXPECT_EQ(FPDF_COLORSPACE_INDEXED, metadata.colorspace); + + // Verify the metadata of an image with RGB colorspace. + obj = FPDFPage_GetObject(page, 37); + ASSERT_EQ(FPDF_PAGEOBJ_IMAGE, FPDFPageObj_GetType(obj)); + ASSERT_TRUE(FPDFImageObj_GetImageMetadata(obj, page, &metadata)); + EXPECT_EQ(126u, metadata.width); + EXPECT_EQ(106u, metadata.height); + EXPECT_NEAR(162.173752, metadata.horizontal_dpi, 0.001); + EXPECT_NEAR(162.555878, metadata.vertical_dpi, 0.001); + EXPECT_EQ(24u, metadata.bits_per_pixel); + EXPECT_EQ(FPDF_COLORSPACE_DEVICERGB, metadata.colorspace); + + UnloadPage(page); +} -- cgit v1.2.3