commit 66ce22c6cdb38ca5941c175aea371df92ae9cb8b
author xlou <xlou@chromium.org> Wed Jan 31 22:24:05 2018 +0000
committer Chromium commit bot <commit-bot@chromium.org> Wed Jan 31 22:24:05 2018 +0000
tree 4557f587133e3005bde76d9b4fc12d19bd899b74
parent bb04c59ec30b00cae6c902fa8bc128220bcff4df

Experimental API for N-up feature support for print

FPDF_ImportNPagesToOne function is added to support N-up feature
for print.
If numPagesOnXAxis * numPagesOnYAxis == 0
    Returns a nullptr.
If numPagesOnXAxis * numPagesOnYAxis == 1
    Creates a new PDF document, and import one page to each output
    page of the PDF document
If numPagesOnXAxis * numPagesOnYAxis > 1,
    FPDF_ImportNPagesToOne imports multiple pages onto the same page.
This feature is intended for print pipeline to use.

Change-Id: Iec1afffe377ff9b7fef3cb33414b29b324154fa4
Reviewed-on: https://pdfium-review.googlesource.com/22050
Commit-Queue: Shirleen Lou <xlou@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

fpdfsdk/fpdfppo_embeddertest.cpp

diff --git a/fpdfsdk/fpdfppo_embeddertest.cpp b/fpdfsdk/fpdfppo_embeddertest.cpp
index c642b71..deb87b5 100644
--- a/fpdfsdk/fpdfppo_embeddertest.cpp
+++ b/fpdfsdk/fpdfppo_embeddertest.cpp
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 #include <string>
 
+#include "public/cpp/fpdf_deleters.h"
 #include "public/fpdf_edit.h"
 #include "public/fpdf_ppo.h"
 #include "public/fpdf_save.h"
@@ -57,6 +58,47 @@
   UnloadPage(page);
 }
 
+TEST_F(FPDFPPOEmbeddertest, ImportNPages) {
+  ASSERT_TRUE(OpenDocument("hello_world_multi_pages.pdf"));
+
+  std::unique_ptr<void, FPDFDocumentDeleter> output_doc_2up(
+      FPDF_ImportNPagesToOne(document(), 612, 792, 2, 1));
+  ASSERT_TRUE(output_doc_2up);
+  EXPECT_EQ(3, FPDF_GetPageCount(output_doc_2up.get()));
+  std::unique_ptr<void, FPDFDocumentDeleter> output_doc_5up(
+      FPDF_ImportNPagesToOne(document(), 612, 792, 5, 1));
+  ASSERT_TRUE(output_doc_5up);
+  EXPECT_EQ(1, FPDF_GetPageCount(output_doc_5up.get()));
+  std::unique_ptr<void, FPDFDocumentDeleter> output_doc_8up(
+      FPDF_ImportNPagesToOne(document(), 792, 612, 8, 1));
+  ASSERT_TRUE(output_doc_8up);
+  EXPECT_EQ(1, FPDF_GetPageCount(output_doc_8up.get()));
+  std::unique_ptr<void, FPDFDocumentDeleter> output_doc_128up(
+      FPDF_ImportNPagesToOne(document(), 792, 612, 128, 1));
+  ASSERT_TRUE(output_doc_128up);
+  EXPECT_EQ(1, FPDF_GetPageCount(output_doc_128up.get()));
+}
+
+TEST_F(FPDFPPOEmbeddertest, BadNupParams) {
+  ASSERT_TRUE(OpenDocument("hello_world_multi_pages.pdf"));
+
+  FPDF_DOCUMENT output_doc_zero_row =
+      FPDF_ImportNPagesToOne(document(), 612, 792, 0, 3);
+  ASSERT_FALSE(output_doc_zero_row);
+  FPDF_DOCUMENT output_doc_zero_col =
+      FPDF_ImportNPagesToOne(document(), 612, 792, 2, 0);
+  ASSERT_FALSE(output_doc_zero_col);
+  FPDF_DOCUMENT output_doc_zero_width =
+      FPDF_ImportNPagesToOne(document(), 0, 792, 2, 1);
+  ASSERT_FALSE(output_doc_zero_width);
+  FPDF_DOCUMENT output_doc_zero_height =
+      FPDF_ImportNPagesToOne(document(), 612, 0, 7, 1);
+  ASSERT_FALSE(output_doc_zero_height);
+}
+
+// TODO(Xlou): Add more tests to check output doc content of
+// FPDF_ImportNPagesToOne()
+
 TEST_F(FPDFPPOEmbeddertest, BadRepeatViewerPref) {
   ASSERT_TRUE(OpenDocument("repeat_viewer_ref.pdf"));