Re-land "Replace CPDF_Rect and CPDF_Point with CFX types."

core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp

Index: core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
index de3a6572f25d41d0a5ec86b99229df3618b6c419..44492b1a54e31f4a7613d554c28d341135355a99 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
@@ -6,6 +6,8 @@
 
 #include "core/src/fpdfapi/fpdf_page/pageint.h"
 
+#include <algorithm>
+
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_page.h"
 #include "core/include/fpdfapi/fpdf_pageobj.h"
@@ -13,6 +15,14 @@
 #include "core/src/fpdfapi/fpdf_render/render_int.h"
 #include "third_party/base/stl_util.h"
 
+namespace {
+
+FX_FLOAT ClipFloat(FX_FLOAT f) {
+  return std::max(0.0f, std::min(1.0f, f));
+}
+
+}  // namespace
+
 void CPDF_GraphicStates::DefaultStates() {
   m_ColorState.New()->Default();
 }
@@ -85,21 +95,21 @@ void CPDF_ClipPathData::SetCount(int path_count, int text_count) {
     m_pTextList = FX_Alloc(CPDF_TextObject*, text_count);
   }
 }
-CPDF_Rect CPDF_ClipPath::GetClipBox() const {
-  CPDF_Rect rect;
+CFX_FloatRect CPDF_ClipPath::GetClipBox() const {
+  CFX_FloatRect rect;
   FX_BOOL bStarted = FALSE;
   int count = GetPathCount();
   if (count) {
     rect = GetPath(0).GetBoundingBox();
     for (int i = 1; i < count; i++) {
-      CPDF_Rect path_rect = GetPath(i).GetBoundingBox();
+      CFX_FloatRect path_rect = GetPath(i).GetBoundingBox();
       rect.Intersect(path_rect);
     }
     bStarted = TRUE;
   }
   count = GetTextCount();
   if (count) {
-    CPDF_Rect layer_rect;
+    CFX_FloatRect layer_rect;
     FX_BOOL bLayerStarted = FALSE;
     for (int i = 0; i < count; i++) {
       CPDF_TextObject* pTextObj = GetText(i);
@@ -128,9 +138,9 @@ void CPDF_ClipPath::AppendPath(CPDF_Path path, int type, FX_BOOL bAutoMerge) {
   if (pData->m_PathCount && bAutoMerge) {
     CPDF_Path old_path = pData->m_pPathList[pData->m_PathCount - 1];
     if (old_path.IsRect()) {
-      CPDF_Rect old_rect(old_path.GetPointX(0), old_path.GetPointY(0),
-                         old_path.GetPointX(2), old_path.GetPointY(2));
-      CPDF_Rect new_rect = path.GetBoundingBox();
+      CFX_FloatRect old_rect(old_path.GetPointX(0), old_path.GetPointY(0),
+                             old_path.GetPointX(2), old_path.GetPointY(2));
+      CFX_FloatRect new_rect = path.GetBoundingBox();
       if (old_rect.Contains(new_rect)) {
         pData->m_PathCount--;
         pData->m_pPathList[pData->m_PathCount].SetNull();
@@ -534,10 +544,10 @@ void CPDF_AllStates::ProcessExtGS(CPDF_Dictionary* pGS,
         }
         break;
       case FXBSTR_ID('C', 'A', 0, 0):
-        pGeneralState->m_StrokeAlpha = PDF_ClipFloat(pObject->GetNumber());
+        pGeneralState->m_StrokeAlpha = ClipFloat(pObject->GetNumber());
         break;
       case FXBSTR_ID('c', 'a', 0, 0):
-        pGeneralState->m_FillAlpha = PDF_ClipFloat(pObject->GetNumber());
+        pGeneralState->m_FillAlpha = ClipFloat(pObject->GetNumber());
         break;
       case FXBSTR_ID('O', 'P', 0, 0):
         pGeneralState->m_StrokeOP = pObject->GetInteger();