Fixes for re-enabling more MSVC level 4 warnings: pdf/ edition

This contains fixes for the following sorts of issues:
* Signedness mismatch

This relies on https://codereview.chromium.org/376003003 to make FPDF_FillRect()
take a 32-bit value for the color in order to make the changes here as simple
and clean as possible.

This also contains a few other cleanups to make code simpler or more consistent.

BUG=81439
TEST=none

Review URL: https://codereview.chromium.org/372273005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282146 0039d316-1c4b-4281-b951-d872f2087c98

7 files changed, 44 insertions, 78 deletions

diff --git a/DEPS b/DEPS
index 5e7d0f1..5218515 100644
--- a/DEPS
+++ b/DEPS
@@ -77,7 +77,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFIum
   # and whatever else without interference from each other.
-  "pdfium_revision": "cb46ea1bca55b448a7a54db2086c6f736f05c35f",
+  "pdfium_revision": "532a6a7ece21ca4ea253a196bb5c61a1861d12a0",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling openmax_dl
   # and whatever else without interference from each other.
diff --git a/pdf/instance.cc b/pdf/instance.cc
index b0b6680..9dee0f6 100644
--- a/pdf/instance.cc
+++ b/pdf/instance.cc
@@ -768,11 +768,7 @@ void Instance::OnPaint(const std::vector<pp::Rect>& paint_rects,
   if (first_paint_) {
     first_paint_ = false;
     pp::Rect rect = pp::Rect(pp::Point(), plugin_size_);
-    unsigned int color = kBackgroundColorA << 24 |
-                         kBackgroundColorR << 16 |
-                         kBackgroundColorG << 8 |
-                         kBackgroundColorB;
-    FillRect(rect, color);
+    FillRect(rect, kBackgroundColor);
     ready->push_back(PaintManager::ReadyRect(rect, image_data_, true));
     *pending = paint_rects;
     return;
@@ -1024,12 +1020,10 @@ void Instance::CalculateBackgroundParts() {
 
   // Add the left, right, and bottom rectangles.  Note: we assume only
   // horizontal centering.
-  BackgroundPart part;
-  part.color = kBackgroundColorA << 24 |
-               kBackgroundColorR << 16 |
-               kBackgroundColorG << 8 |
-               kBackgroundColorB;
-  part.location = pp::Rect(0, 0, left_width, bottom);
+  BackgroundPart part = {
+    pp::Rect(0, 0, left_width, bottom),
+    kBackgroundColor
+  };
   if (!part.location.IsEmpty())
     background_parts_.push_back(part);
   part.location = pp::Rect(right_start, 0, right_width, bottom);
@@ -1066,17 +1060,17 @@ int Instance::GetDocumentPixelHeight() const {
                                device_scale_));
 }
 
-void Instance::FillRect(const pp::Rect& rect, unsigned int color) {
+void Instance::FillRect(const pp::Rect& rect, uint32 color) {
   DCHECK(!image_data_.is_null() || rect.IsEmpty());
-  unsigned int* buffer_start = static_cast<unsigned int*>(image_data_.data());
+  uint32* buffer_start = static_cast<uint32*>(image_data_.data());
   int stride = image_data_.stride();
-  unsigned int* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
+  uint32* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
   int height = rect.height();
   int width = rect.width();
   for (int y = 0; y < height; ++y) {
     for (int x = 0; x < width; ++x)
       *(ptr + x) = color;
-    ptr += stride /4;
+    ptr += stride / 4;
   }
 }
 
diff --git a/pdf/instance.h b/pdf/instance.h
index 07c1a19..c377b03 100644
--- a/pdf/instance.h
+++ b/pdf/instance.h
@@ -228,7 +228,7 @@ class Instance : public pp::InstancePrivate,
   int GetDocumentPixelHeight() const;
 
   // Draws a rectangle with the specified dimensions and color in our buffer.
-  void FillRect(const pp::Rect& rect, unsigned int color);
+  void FillRect(const pp::Rect& rect, uint32 color);
 
   std::vector<pp::ImageData> GetThumbnailResources();
   std::vector<pp::ImageData> GetProgressBarResources(pp::ImageData* background);
@@ -410,7 +410,7 @@ class Instance : public pp::InstancePrivate,
 
   struct BackgroundPart {
     pp::Rect location;
-    unsigned int color;
+    uint32 color;
   };
   std::vector<BackgroundPart> background_parts_;
 
diff --git a/pdf/out_of_process_instance.cc b/pdf/out_of_process_instance.cc
index a08f8b0..6f728b7 100644
--- a/pdf/out_of_process_instance.cc
+++ b/pdf/out_of_process_instance.cc
@@ -629,11 +629,7 @@ void OutOfProcessInstance::OnPaint(
   if (first_paint_) {
     first_paint_ = false;
     pp::Rect rect = pp::Rect(pp::Point(), image_data_.size());
-    unsigned int color = kBackgroundColorA << 24 |
-                         kBackgroundColorR << 16 |
-                         kBackgroundColorG << 8 |
-                         kBackgroundColorB;
-    FillRect(rect, color);
+    FillRect(rect, kBackgroundColor);
     ready->push_back(PaintManager::ReadyRect(rect, image_data_, true));
   }
 
@@ -724,12 +720,10 @@ void OutOfProcessInstance::CalculateBackgroundParts() {
 
   // Add the left, right, and bottom rectangles.  Note: we assume only
   // horizontal centering.
-  BackgroundPart part;
-  part.color = kBackgroundColorA << 24 |
-               kBackgroundColorR << 16 |
-               kBackgroundColorG << 8 |
-               kBackgroundColorB;
-  part.location = pp::Rect(0, 0, left_width, bottom);
+  BackgroundPart part = {
+    pp::Rect(0, 0, left_width, bottom),
+    kBackgroundColor
+  };
   if (!part.location.IsEmpty())
     background_parts_.push_back(part);
   part.location = pp::Rect(right_start, 0, right_width, bottom);
@@ -750,11 +744,11 @@ int OutOfProcessInstance::GetDocumentPixelHeight() const {
       ceil(document_size_.height() * zoom_ * device_scale_));
 }
 
-void OutOfProcessInstance::FillRect(const pp::Rect& rect, unsigned int color) {
+void OutOfProcessInstance::FillRect(const pp::Rect& rect, uint32 color) {
   DCHECK(!image_data_.is_null() || rect.IsEmpty());
-  unsigned int* buffer_start = static_cast<unsigned int*>(image_data_.data());
+  uint32* buffer_start = static_cast<uint32*>(image_data_.data());
   int stride = image_data_.stride();
-  unsigned int* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
+  uint32* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
   int height = rect.height();
   int width = rect.width();
   for (int y = 0; y < height; ++y) {
diff --git a/pdf/out_of_process_instance.h b/pdf/out_of_process_instance.h
index f1f8862..c001435 100644
--- a/pdf/out_of_process_instance.h
+++ b/pdf/out_of_process_instance.h
@@ -159,7 +159,7 @@ class OutOfProcessInstance : public pp::Instance,
   int GetDocumentPixelHeight() const;
 
   // Draws a rectangle with the specified dimensions and color in our buffer.
-  void FillRect(const pp::Rect& rect, unsigned int color);
+  void FillRect(const pp::Rect& rect, uint32 color);
 
   void LoadUrl(const std::string& url);
   void LoadPreviewUrl(const std::string& url);
@@ -240,7 +240,7 @@ class OutOfProcessInstance : public pp::Instance,
 
   struct BackgroundPart {
     pp::Rect location;
-    unsigned int color;
+    uint32 color;
   };
   std::vector<BackgroundPart> background_parts_;
 
diff --git a/pdf/pdf_engine.h b/pdf/pdf_engine.h
index ee1cb1f..b8b6fda 100644
--- a/pdf/pdf_engine.h
+++ b/pdf/pdf_engine.h
@@ -29,10 +29,7 @@ namespace pp {
 class InputEvent;
 }
 
-#define kBackgroundColorR 204
-#define kBackgroundColorG 204
-#define kBackgroundColorB 204
-#define kBackgroundColorA 255
+const uint32 kBackgroundColor = 0xFFCCCCCC;
 
 namespace chrome_pdf {
 
diff --git a/pdf/pdfium/pdfium_engine.cc b/pdf/pdfium/pdfium_engine.cc
index c1203bb..84aa47a 100644
--- a/pdf/pdfium/pdfium_engine.cc
+++ b/pdf/pdfium/pdfium_engine.cc
@@ -55,10 +55,7 @@ namespace chrome_pdf {
 #define kHighlightColorG 193
 #define kHighlightColorB 218
 
-#define kPendingPageColorR 238
-#define kPendingPageColorG 238
-#define kPendingPageColorB 238
-#define kPendingPageColorA 255
+const uint32 kPendingPageColor = 0xFFEEEEEE;
 
 #define kFormHighlightColor 0xFFE4DD
 #define kFormHighlightAlpha 100
@@ -1058,7 +1055,7 @@ pp::Buffer_Dev PDFiumEngine::PrintPagesAsRasterPDF(
 
     // Clear the bitmap
     FPDFBitmap_FillRect(bitmap, 0, 0, bitmap_size.width(),
-                        bitmap_size.height(), 255, 255, 255, 255);
+                        bitmap_size.height(), 0xFFFFFFFF);
 
     pp::Rect page_rect = pages_to_print[i].rect();
     FPDF_RenderPageBitmap(bitmap, pages_to_print[i].GetPrintPage(),
@@ -1931,18 +1928,15 @@ void PDFiumEngine::PaintThumbnail(pp::ImageData* image_data, int index) {
       FPDFBitmap_BGRx, image_data->data(), image_data->stride());
 
   if (pages_[index]->available()) {
-    FPDFBitmap_FillRect(
-        bitmap, 0, 0, image_data->size().width(), image_data->size().height(),
-        255, 255, 255, 255);
+    FPDFBitmap_FillRect(bitmap, 0, 0, image_data->size().width(),
+                        image_data->size().height(), 0xFFFFFFFF);
 
     FPDF_RenderPageBitmap(
         bitmap, pages_[index]->GetPage(), 0, 0, image_data->size().width(),
         image_data->size().height(), 0, GetRenderingFlags());
   } else {
-    FPDFBitmap_FillRect(
-        bitmap, 0, 0, image_data->size().width(), image_data->size().height(),
-        kPendingPageColorR, kPendingPageColorG, kPendingPageColorB,
-        kPendingPageColorA);
+    FPDFBitmap_FillRect(bitmap, 0, 0, image_data->size().width(),
+                        image_data->size().height(), kPendingPageColor);
   }
 
   FPDFBitmap_Destroy(bitmap);
@@ -2346,9 +2340,8 @@ bool PDFiumEngine::ContinuePaint(int progressive_index,
     int start_x, start_y, size_x, size_y;
     GetPDFiumRect(
         page_index, dirty, &start_x, &start_y, &size_x, &size_y);
-    FPDFBitmap_FillRect(
-        progressive_paints_[progressive_index].bitmap, start_x, start_y, size_x,
-        size_y, 255, 255, 255, 255);
+    FPDFBitmap_FillRect(progressive_paints_[progressive_index].bitmap, start_x,
+                        start_y, size_x, size_y, 0xFFFFFFFF);
     rv = FPDF_RenderPageBitmap_Start(
         progressive_paints_[progressive_index].bitmap,
         pages_[page_index]->GetPage(), start_x, start_y, size_x, size_y,
@@ -2408,11 +2401,9 @@ void PDFiumEngine::FillPageSides(int progressive_index) {
                       kPageShadowBottom + kPageSeparatorThickness);
     left = GetScreenRect(left).Intersect(dirty_in_screen);
 
-    FPDFBitmap_FillRect(
-        bitmap, left.x() - dirty_in_screen.x(),
-        left.y() - dirty_in_screen.y(), left.width(), left.height(),
-        kBackgroundColorR, kBackgroundColorG, kBackgroundColorB,
-        kBackgroundColorA);
+    FPDFBitmap_FillRect(bitmap, left.x() - dirty_in_screen.x(),
+                        left.y() - dirty_in_screen.y(), left.width(),
+                        left.height(), kBackgroundColor);
   }
 
   if (page_rect.right() < document_size_.width()) {
@@ -2424,11 +2415,9 @@ void PDFiumEngine::FillPageSides(int progressive_index) {
                        kPageShadowBottom + kPageSeparatorThickness);
     right = GetScreenRect(right).Intersect(dirty_in_screen);
 
-    FPDFBitmap_FillRect(
-        bitmap, right.x() - dirty_in_screen.x(),
-        right.y() - dirty_in_screen.y(), right.width(), right.height(),
-        kBackgroundColorR, kBackgroundColorG, kBackgroundColorB,
-        kBackgroundColorA);
+    FPDFBitmap_FillRect(bitmap, right.x() - dirty_in_screen.x(),
+                        right.y() - dirty_in_screen.y(), right.width(),
+                        right.height(), kBackgroundColor);
   }
 
   // Paint separator.
@@ -2438,11 +2427,9 @@ void PDFiumEngine::FillPageSides(int progressive_index) {
                   kPageSeparatorThickness);
   bottom = GetScreenRect(bottom).Intersect(dirty_in_screen);
 
-  FPDFBitmap_FillRect(
-      bitmap, bottom.x() - dirty_in_screen.x(),
-      bottom.y() - dirty_in_screen.y(), bottom.width(), bottom.height(),
-      kBackgroundColorR, kBackgroundColorG, kBackgroundColorB,
-      kBackgroundColorA);
+  FPDFBitmap_FillRect(bitmap, bottom.x() - dirty_in_screen.x(),
+                      bottom.y() - dirty_in_screen.y(), bottom.width(),
+                      bottom.height(), kBackgroundColor);
 }
 
 void PDFiumEngine::PaintPageShadow(int progressive_index,
@@ -2515,8 +2502,7 @@ void PDFiumEngine::PaintUnavailablePage(int page_index,
   GetPDFiumRect(page_index, dirty, &start_x, &start_y, &size_x, &size_y);
   FPDF_BITMAP bitmap = CreateBitmap(dirty, image_data);
   FPDFBitmap_FillRect(bitmap, start_x, start_y, size_x, size_y,
-      kPendingPageColorR, kPendingPageColorG, kPendingPageColorB,
-      kPendingPageColorA);
+                      kPendingPageColor);
 
   pp::Rect loading_text_in_screen(
       pages_[page_index]->rect().width() / 2,
@@ -2817,10 +2803,6 @@ void PDFiumEngine::DrawPageShadow(const pp::Rect& page_rc,
 
   // Page drop shadow parameters.
   const double factor = 0.5;
-  const uint32 background = (kBackgroundColorA << 24) |
-                            (kBackgroundColorR << 16) |
-                            (kBackgroundColorG << 8) |
-                            kBackgroundColorB;
   uint32 depth = std::max(
       std::max(page_rect.x() - shadow_rect.x(),
                page_rect.y() - shadow_rect.y()),
@@ -2830,7 +2812,7 @@ void PDFiumEngine::DrawPageShadow(const pp::Rect& page_rc,
 
   // We need to check depth only to verify our copy of shadow matrix is correct.
   if (!page_shadow_.get() || page_shadow_->depth() != depth)
-    page_shadow_.reset(new ShadowMatrix(depth, factor, background));
+    page_shadow_.reset(new ShadowMatrix(depth, factor, kBackgroundColor));
 
   DCHECK(!image_data->is_null());
   DrawShadow(image_data, shadow_rect, page_rect, clip_rect, *page_shadow_);
@@ -3314,8 +3296,7 @@ bool PDFiumEngineExports::RenderPDFPageToDC(const void* pdf_buffer,
     FPDF_BITMAP bitmap = FPDFBitmap_Create(dest.width(), dest.height(),
                                            FPDFBitmap_BGRx);
       // Clear the bitmap
-    FPDFBitmap_FillRect(bitmap, 0, 0, dest.width(), dest.height(), 255, 255,
-                        255, 255);
+    FPDFBitmap_FillRect(bitmap, 0, 0, dest.width(), dest.height(), 0xFFFFFFFF);
     FPDF_RenderPageBitmap(
         bitmap, page, 0, 0, dest.width(), dest.height(), rotate,
         FPDF_ANNOT | FPDF_PRINTING | FPDF_NO_CATCH);
@@ -3368,7 +3349,7 @@ bool PDFiumEngineExports::RenderPDFPageToBitmap(
                           settings.bounds.width() * 4);
   // Clear the bitmap
   FPDFBitmap_FillRect(bitmap, 0, 0, settings.bounds.width(),
-                      settings.bounds.height(), 255, 255, 255, 255);
+                      settings.bounds.height(), 0xFFFFFFFF);
   // Shift top-left corner of bounds to (0, 0) if it's not there.
   dest.set_point(dest.point() - settings.bounds.point());
   FPDF_RenderPageBitmap(