commit 0ca4da7091fef4bc82778f197e68660aa31af30b
author Lei Zhang <thestig@chromium.org> Wed Feb 13 18:22:55 2019 +0000
committer Chromium commit bot <commit-bot@chromium.org> Wed Feb 13 18:22:55 2019 +0000
tree c6c4e4130c0cbfc0355efcc7eb86b8d8a4518c50
parent 7a4e5c66cab9a117f4bdb4b80287ff9ebcaeee46

Add embedder tests for FPDFPageObj_HasTransparency().

Change-Id: I7e2e56f239e8848bd53a93f6dc98988d0d31235f
Reviewed-on: https://pdfium-review.googlesource.com/c/50693
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

fpdfsdk/fpdf_editpage_embeddertest.cpp

diff --git a/fpdfsdk/fpdf_editpage_embeddertest.cpp b/fpdfsdk/fpdf_editpage_embeddertest.cpp
index c6960a5..9947dbd 100644
--- a/fpdfsdk/fpdf_editpage_embeddertest.cpp
+++ b/fpdfsdk/fpdf_editpage_embeddertest.cpp
@@ -66,3 +66,61 @@
     CloseSavedDocument();
   }
 }
+
+TEST_F(FPDFEditPageEmbedderTest, HasTransparencyImage) {
+  constexpr int kExpectedObjectCount = 39;
+  ASSERT_TRUE(OpenDocument("embedded_images.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+  ASSERT_EQ(kExpectedObjectCount, FPDFPage_CountObjects(page));
+
+  for (int i = 0; i < kExpectedObjectCount; ++i) {
+    FPDF_PAGEOBJECT obj = FPDFPage_GetObject(page, i);
+    EXPECT_FALSE(FPDFPageObj_HasTransparency(obj));
+
+    FPDFPageObj_SetFillColor(obj, 255, 0, 0, 127);
+    EXPECT_TRUE(FPDFPageObj_HasTransparency(obj));
+  }
+
+  UnloadPage(page);
+}
+
+TEST_F(FPDFEditPageEmbedderTest, HasTransparencyInvalid) {
+  EXPECT_FALSE(FPDFPageObj_HasTransparency(nullptr));
+}
+
+TEST_F(FPDFEditPageEmbedderTest, HasTransparencyPath) {
+  constexpr int kExpectedObjectCount = 8;
+  EXPECT_TRUE(OpenDocument("rectangles.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+  ASSERT_EQ(kExpectedObjectCount, FPDFPage_CountObjects(page));
+
+  for (int i = 0; i < kExpectedObjectCount; ++i) {
+    FPDF_PAGEOBJECT obj = FPDFPage_GetObject(page, i);
+    EXPECT_FALSE(FPDFPageObj_HasTransparency(obj));
+
+    FPDFPageObj_SetStrokeColor(obj, 63, 63, 0, 127);
+    EXPECT_TRUE(FPDFPageObj_HasTransparency(obj));
+  }
+
+  UnloadPage(page);
+}
+
+TEST_F(FPDFEditPageEmbedderTest, HasTransparencyText) {
+  constexpr int kExpectedObjectCount = 2;
+  EXPECT_TRUE(OpenDocument("text_render_mode.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+  ASSERT_EQ(kExpectedObjectCount, FPDFPage_CountObjects(page));
+
+  for (int i = 0; i < kExpectedObjectCount; ++i) {
+    FPDF_PAGEOBJECT obj = FPDFPage_GetObject(page, i);
+    EXPECT_FALSE(FPDFPageObj_HasTransparency(obj));
+
+    FPDFPageObj_SetBlendMode(obj, "Lighten");
+    EXPECT_TRUE(FPDFPageObj_HasTransparency(obj));
+  }
+
+  UnloadPage(page);
+}