Introduce ScopedFPDF types in public/cpp/fpdf_scopers.h

Applies std::remove_ptr to the public API types so that we can
deduce a correct unique ptr type no matter how that API might
change away from void* usage.

Creates shorter names for std::unique_ptr<std::remove_pointer<>, ...>

Change-Id: I04a0ff43cb7d5a4d3867939a53a54c9cef00db86
Reviewed-on: https://pdfium-review.googlesource.com/31292
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

6 files changed, 16 insertions, 11 deletions

diff --git a/core/fpdfapi/edit/cpdf_creator_embeddertest.cpp b/core/fpdfapi/edit/cpdf_creator_embeddertest.cpp
index 86cd67b121..1913c4ba19 100644
--- a/core/fpdfapi/edit/cpdf_creator_embeddertest.cpp
+++ b/core/fpdfapi/edit/cpdf_creator_embeddertest.cpp
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "core/fxcrt/fx_system.h"
+#include "public/cpp/fpdf_scopers.h"
 #include "public/fpdf_annot.h"
 #include "public/fpdf_edit.h"
 #include "public/fpdfview.h"
@@ -27,8 +28,7 @@ TEST_F(CPDF_CreatorEmbedderTest, SavedDocsAreEqualAfterParse) {
     ASSERT_GE(1, FPDF_GetPageCount(document()));
     FPDF_PAGE page = LoadPage(0);
     ASSERT_TRUE(page);
-    std::unique_ptr<void, FPDFBitmapDeleter> bitmap =
-        RenderLoadedPageWithFlags(page, FPDF_ANNOT);
+    ScopedFPDFBitmap bitmap = RenderLoadedPageWithFlags(page, FPDF_ANNOT);
     EXPECT_EQ(595, FPDFBitmap_GetWidth(bitmap.get()));
     EXPECT_EQ(842, FPDFBitmap_GetHeight(bitmap.get()));
     UnloadPage(page);
diff --git a/core/fpdfapi/page/cpdf_stitchfunc_embeddertest.cpp b/core/fpdfapi/page/cpdf_stitchfunc_embeddertest.cpp
index ebc71926a0..9b3b18d425 100644
--- a/core/fpdfapi/page/cpdf_stitchfunc_embeddertest.cpp
+++ b/core/fpdfapi/page/cpdf_stitchfunc_embeddertest.cpp
@@ -4,6 +4,7 @@
 
 #include <memory>
 
+#include "public/cpp/fpdf_scopers.h"
 #include "testing/embedder_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -16,7 +17,7 @@ TEST_F(FPDFPageFuncEmbeddertest, Bug_551460) {
   EXPECT_TRUE(OpenDocument("bug_551460.pdf"));
   FPDF_PAGE page = LoadPage(0);
   ASSERT_TRUE(page);
-  std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+  ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
   CompareBitmap(bitmap.get(), 612, 792, "1940568c9ba33bac5d0b1ee9558c76b3");
   UnloadPage(page);
 }
diff --git a/core/fpdfapi/parser/cpdf_security_handler_embeddertest.cpp b/core/fpdfapi/parser/cpdf_security_handler_embeddertest.cpp
index 4937b3d8d1..95f1dd4977 100644
--- a/core/fpdfapi/parser/cpdf_security_handler_embeddertest.cpp
+++ b/core/fpdfapi/parser/cpdf_security_handler_embeddertest.cpp
@@ -6,6 +6,7 @@
 #include <string>
 
 #include "core/fxcrt/fx_system.h"
+#include "public/cpp/fpdf_scopers.h"
 #include "public/fpdf_edit.h"
 #include "public/fpdf_save.h"
 #include "public/fpdfview.h"
@@ -61,7 +62,7 @@ TEST_F(CPDFSecurityHandlerEmbeddertest, PasswordAfterGenerateSave) {
     EXPECT_TRUE(FPDFPath_SetFillColor(red_rect, 255, 0, 0, 255));
     EXPECT_TRUE(FPDFPath_SetDrawMode(red_rect, FPDF_FILLMODE_ALTERNATE, 0));
     FPDFPage_InsertObject(page, red_rect);
-    std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+    ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
     CompareBitmap(bitmap.get(), 612, 792, md5);
     EXPECT_TRUE(FPDFPage_GenerateContent(page));
     SetWholeFileAvailable();
diff --git a/core/fpdfapi/parser/fpdf_parser_decode_embeddertest.cpp b/core/fpdfapi/parser/fpdf_parser_decode_embeddertest.cpp
index 0a7dde9b05..7054db99d7 100644
--- a/core/fpdfapi/parser/fpdf_parser_decode_embeddertest.cpp
+++ b/core/fpdfapi/parser/fpdf_parser_decode_embeddertest.cpp
@@ -7,6 +7,7 @@
 #include <string>
 
 #include "core/fpdfapi/parser/fpdf_parser_decode.h"
+#include "public/cpp/fpdf_scopers.h"
 #include "testing/embedder_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/test_support.h"
@@ -94,7 +95,7 @@ TEST_F(FPDFParserDecodeEmbeddertest, Bug_552046) {
   EXPECT_TRUE(OpenDocument("bug_552046.pdf"));
   FPDF_PAGE page = LoadPage(0);
   ASSERT_TRUE(page);
-  std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+  ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
   CompareBitmap(bitmap.get(), 612, 792, "1940568c9ba33bac5d0b1ee9558c76b3");
   UnloadPage(page);
 }
@@ -105,7 +106,7 @@ TEST_F(FPDFParserDecodeEmbeddertest, Bug_555784) {
   EXPECT_TRUE(OpenDocument("bug_555784.pdf"));
   FPDF_PAGE page = LoadPage(0);
   ASSERT_TRUE(page);
-  std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+  ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
   CompareBitmap(bitmap.get(), 612, 792, "1940568c9ba33bac5d0b1ee9558c76b3");
   UnloadPage(page);
 }
@@ -116,7 +117,7 @@ TEST_F(FPDFParserDecodeEmbeddertest, Bug_455199) {
   EXPECT_TRUE(OpenDocument("bug_455199.pdf"));
   FPDF_PAGE page = LoadPage(0);
   ASSERT_TRUE(page);
-  std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+  ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
 #if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
   const char kExpectedMd5sum[] = "b90475ca64d1348c3bf5e2b77ad9187a";
 #elif _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
diff --git a/core/fpdfapi/render/fpdf_render_loadimage_embeddertest.cpp b/core/fpdfapi/render/fpdf_render_loadimage_embeddertest.cpp
index 588b974e29..48d7ea3399 100644
--- a/core/fpdfapi/render/fpdf_render_loadimage_embeddertest.cpp
+++ b/core/fpdfapi/render/fpdf_render_loadimage_embeddertest.cpp
@@ -4,6 +4,7 @@
 
 #include <memory>
 
+#include "public/cpp/fpdf_scopers.h"
 #include "testing/embedder_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -15,7 +16,7 @@ TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_554151) {
   EXPECT_TRUE(OpenDocument("bug_554151.pdf"));
   FPDF_PAGE page = LoadPage(0);
   ASSERT_TRUE(page);
-  std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+  ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
   CompareBitmap(bitmap.get(), 612, 792, "a14d7ee573c1b2456d7bf6b7762823cf");
   UnloadPage(page);
 }
@@ -25,7 +26,7 @@ TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_557223) {
   EXPECT_TRUE(OpenDocument("bug_557223.pdf"));
   FPDF_PAGE page = LoadPage(0);
   ASSERT_TRUE(page);
-  std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+  ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
   CompareBitmap(bitmap.get(), 24, 24, "dc0ea1b743c2edb22c597cadc8537f7b");
   UnloadPage(page);
 }
@@ -35,7 +36,7 @@ TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_603518) {
   EXPECT_TRUE(OpenDocument("bug_603518.pdf"));
   FPDF_PAGE page = LoadPage(0);
   EXPECT_NE(nullptr, page);
-  std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+  ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
   CompareBitmap(bitmap.get(), 749, 749, "b9e75190cdc5edf0069a408744ca07dc");
   UnloadPage(page);
 }
diff --git a/core/fpdfapi/render/fpdf_render_pattern_embeddertest.cpp b/core/fpdfapi/render/fpdf_render_pattern_embeddertest.cpp
index 00b0933b71..31ce246365 100644
--- a/core/fpdfapi/render/fpdf_render_pattern_embeddertest.cpp
+++ b/core/fpdfapi/render/fpdf_render_pattern_embeddertest.cpp
@@ -4,6 +4,7 @@
 
 #include <memory>
 
+#include "public/cpp/fpdf_scopers.h"
 #include "testing/embedder_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -14,7 +15,7 @@ TEST_F(FPDFRenderPatternEmbeddertest, LoadError_547706) {
   EXPECT_TRUE(OpenDocument("bug_547706.pdf"));
   FPDF_PAGE page = LoadPage(0);
   ASSERT_TRUE(page);
-  std::unique_ptr<void, FPDFBitmapDeleter> bitmap = RenderLoadedPage(page);
+  ScopedFPDFBitmap bitmap = RenderLoadedPage(page);
   CompareBitmap(bitmap.get(), 612, 792, "1940568c9ba33bac5d0b1ee9558c76b3");
   UnloadPage(page);
 }