Rename the other CPDF_Color::SetValue() variant.

Rename it to SetValueForNonePattern() and combine the components
parameters into a std::vector. Fix the callers to use std::vector as
well.

Change-Id: I0edd7e7876e47b56821e63cc5073fc21fd4098ee
Reviewed-on: https://pdfium-review.googlesource.com/30470
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>

6 files changed, 54 insertions, 83 deletions

diff --git a/core/fpdfapi/page/cpdf_color.cpp b/core/fpdfapi/page/cpdf_color.cpp
index 26db5dec15..3c87457d1b 100644
--- a/core/fpdfapi/page/cpdf_color.cpp
+++ b/core/fpdfapi/page/cpdf_color.cpp
@@ -79,11 +79,11 @@ void CPDF_Color::SetColorSpace(CPDF_ColorSpace* pCS) {
     m_pBuffer = pCS->CreateBufAndSetDefaultColor();
 }
 
-void CPDF_Color::SetValue(const float* comps) {
-  if (!m_pBuffer)
-    return;
-  if (!IsPatternInternal())
-    memcpy(m_pBuffer, comps, m_pCS->CountComponents() * sizeof(float));
+void CPDF_Color::SetValueForNonPattern(const std::vector<float>& values) {
+  ASSERT(m_pBuffer);
+  ASSERT(!IsPatternInternal());
+  ASSERT(m_pCS->CountComponents() <= values.size());
+  memcpy(m_pBuffer, values.data(), m_pCS->CountComponents() * sizeof(float));
 }
 
 void CPDF_Color::SetValueForPattern(CPDF_Pattern* pPattern,
diff --git a/core/fpdfapi/page/cpdf_color.h b/core/fpdfapi/page/cpdf_color.h
index a6e640c736..9b94f0d53b 100644
--- a/core/fpdfapi/page/cpdf_color.h
+++ b/core/fpdfapi/page/cpdf_color.h
@@ -25,7 +25,7 @@ class CPDF_Color {
   void Copy(const CPDF_Color& src);
 
   void SetColorSpace(CPDF_ColorSpace* pCS);
-  void SetValue(const float* comp);
+  void SetValueForNonPattern(const std::vector<float>& values);
   void SetValueForPattern(CPDF_Pattern* pPattern,
                           const std::vector<float>& values);
 
diff --git a/core/fpdfapi/page/cpdf_colorstate.cpp b/core/fpdfapi/page/cpdf_colorstate.cpp
index 16d2770600..492114ab00 100644
--- a/core/fpdfapi/page/cpdf_colorstate.cpp
+++ b/core/fpdfapi/page/cpdf_colorstate.cpp
@@ -70,18 +70,15 @@ bool CPDF_ColorState::HasStrokeColor() const {
 }
 
 void CPDF_ColorState::SetFillColor(CPDF_ColorSpace* pCS,
-                                   float* pValue,
-                                   uint32_t nValues) {
+                                   const std::vector<float>& values) {
   ColorData* pData = m_Ref.GetPrivateCopy();
-  SetColor(pData->m_FillColor, &pData->m_FillColorRef, pCS, pValue, nValues);
+  SetColor(pCS, values, &pData->m_FillColor, &pData->m_FillColorRef);
 }
 
 void CPDF_ColorState::SetStrokeColor(CPDF_ColorSpace* pCS,
-                                     float* pValue,
-                                     uint32_t nValues) {
+                                     const std::vector<float>& values) {
   ColorData* pData = m_Ref.GetPrivateCopy();
-  SetColor(pData->m_StrokeColor, &pData->m_StrokeColorRef, pCS, pValue,
-           nValues);
+  SetColor(pCS, values, &pData->m_StrokeColor, &pData->m_StrokeColorRef);
 }
 
 void CPDF_ColorState::SetFillPattern(CPDF_Pattern* pPattern,
@@ -119,24 +116,27 @@ void CPDF_ColorState::SetStrokePattern(CPDF_Pattern* pPattern,
       pData->m_StrokeColor.GetRGB(&R, &G, &B) ? FXSYS_BGR(B, G, R) : 0xFFFFFFFF;
 }
 
-void CPDF_ColorState::SetColor(CPDF_Color& color,
-                               FX_COLORREF* colorref,
-                               CPDF_ColorSpace* pCS,
-                               float* pValue,
-                               uint32_t nValues) {
+void CPDF_ColorState::SetColor(CPDF_ColorSpace* pCS,
+                               const std::vector<float>& values,
+                               CPDF_Color* color,
+                               FX_COLORREF* colorref) {
+  ASSERT(color);
+  ASSERT(colorref);
+
   if (pCS)
-    color.SetColorSpace(pCS);
-  else if (color.IsNull())
-    color.SetColorSpace(CPDF_ColorSpace::GetStockCS(PDFCS_DEVICEGRAY));
+    color->SetColorSpace(pCS);
+  else if (color->IsNull())
+    color->SetColorSpace(CPDF_ColorSpace::GetStockCS(PDFCS_DEVICEGRAY));
 
-  if (color.GetColorSpace()->CountComponents() > nValues)
+  if (color->GetColorSpace()->CountComponents() > values.size())
     return;
 
-  color.SetValue(pValue);
+  if (!color->IsPattern())
+    color->SetValueForNonPattern(values);
   int R;
   int G;
   int B;
-  *colorref = color.GetRGB(&R, &G, &B) ? FXSYS_BGR(B, G, R) : 0xFFFFFFFF;
+  *colorref = color->GetRGB(&R, &G, &B) ? FXSYS_BGR(B, G, R) : 0xFFFFFFFF;
 }
 
 CPDF_ColorState::ColorData::ColorData()
diff --git a/core/fpdfapi/page/cpdf_colorstate.h b/core/fpdfapi/page/cpdf_colorstate.h
index 053e103ead..a617409268 100644
--- a/core/fpdfapi/page/cpdf_colorstate.h
+++ b/core/fpdfapi/page/cpdf_colorstate.h
@@ -41,8 +41,8 @@ class CPDF_ColorState {
   CPDF_Color* GetMutableStrokeColor();
   bool HasStrokeColor() const;
 
-  void SetFillColor(CPDF_ColorSpace* pCS, float* pValue, uint32_t nValues);
-  void SetStrokeColor(CPDF_ColorSpace* pCS, float* pValue, uint32_t nValues);
+  void SetFillColor(CPDF_ColorSpace* pCS, const std::vector<float>& values);
+  void SetStrokeColor(CPDF_ColorSpace* pCS, const std::vector<float>& values);
   void SetFillPattern(CPDF_Pattern* pattern, const std::vector<float>& values);
   void SetStrokePattern(CPDF_Pattern* pattern,
                         const std::vector<float>& values);
@@ -64,11 +64,10 @@ class CPDF_ColorState {
     CPDF_Color m_StrokeColor;
   };
 
-  void SetColor(CPDF_Color& color,
-                FX_COLORREF* colorref,
-                CPDF_ColorSpace* pCS,
-                float* pValue,
-                uint32_t nValues);
+  void SetColor(CPDF_ColorSpace* pCS,
+                const std::vector<float>& values,
+                CPDF_Color* color,
+                FX_COLORREF* colorref);
 
   SharedCopyOnWrite<ColorData> m_Ref;
 };
diff --git a/core/fpdfapi/page/cpdf_streamcontentparser.cpp b/core/fpdfapi/page/cpdf_streamcontentparser.cpp
index 5d1f5efd49..c369604340 100644
--- a/core/fpdfapi/page/cpdf_streamcontentparser.cpp
+++ b/core/fpdfapi/page/cpdf_streamcontentparser.cpp
@@ -6,6 +6,7 @@
 
 #include "core/fpdfapi/page/cpdf_streamcontentparser.h"
 
+#include <algorithm>
 #include <memory>
 #include <utility>
 #include <vector>
@@ -420,6 +421,13 @@ float CPDF_StreamContentParser::GetNumber(uint32_t index) const {
   return 0;
 }
 
+std::vector<float> CPDF_StreamContentParser::GetNumbers(size_t count) const {
+  std::vector<float> values(count);
+  for (size_t i = 0; i < count; ++i)
+    values[i] = GetNumber(count - i - 1);
+  return values;
+}
+
 void CPDF_StreamContentParser::SetGraphicStates(CPDF_PageObject* pObj,
                                                 bool bColor,
                                                 bool bText,
@@ -834,10 +842,7 @@ CPDF_ImageObject* CPDF_StreamContentParser::AddImageObject(
 
 std::vector<float> CPDF_StreamContentParser::GetColors() const {
   ASSERT(m_ParamCount > 0);
-  std::vector<float> values(m_ParamCount);
-  for (size_t i = 0; i < m_ParamCount; ++i)
-    values[i] = GetNumber(m_ParamCount - i - 1);
-  return values;
+  return GetNumbers(m_ParamCount);
 }
 
 std::vector<float> CPDF_StreamContentParser::GetNamedColors() const {
@@ -881,15 +886,13 @@ void CPDF_StreamContentParser::Handle_EOFillPath() {
 }
 
 void CPDF_StreamContentParser::Handle_SetGray_Fill() {
-  float value = GetNumber(0);
   CPDF_ColorSpace* pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICEGRAY);
-  m_pCurStates->m_ColorState.SetFillColor(pCS, &value, 1);
+  m_pCurStates->m_ColorState.SetFillColor(pCS, GetNumbers(1));
 }
 
 void CPDF_StreamContentParser::Handle_SetGray_Stroke() {
-  float value = GetNumber(0);
   CPDF_ColorSpace* pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICEGRAY);
-  m_pCurStates->m_ColorState.SetStrokeColor(pCS, &value, 1);
+  m_pCurStates->m_ColorState.SetStrokeColor(pCS, GetNumbers(1));
 }
 
 void CPDF_StreamContentParser::Handle_SetExtendGraphState() {
@@ -932,24 +935,16 @@ void CPDF_StreamContentParser::Handle_SetCMYKColor_Fill() {
   if (m_ParamCount != 4)
     return;
 
-  float values[4];
-  for (int i = 0; i < 4; i++) {
-    values[i] = GetNumber(3 - i);
-  }
   CPDF_ColorSpace* pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICECMYK);
-  m_pCurStates->m_ColorState.SetFillColor(pCS, values, 4);
+  m_pCurStates->m_ColorState.SetFillColor(pCS, GetNumbers(4));
 }
 
 void CPDF_StreamContentParser::Handle_SetCMYKColor_Stroke() {
   if (m_ParamCount != 4)
     return;
 
-  float values[4];
-  for (int i = 0; i < 4; i++) {
-    values[i] = GetNumber(3 - i);
-  }
   CPDF_ColorSpace* pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICECMYK);
-  m_pCurStates->m_ColorState.SetStrokeColor(pCS, values, 4);
+  m_pCurStates->m_ColorState.SetStrokeColor(pCS, GetNumbers(4));
 }
 
 void CPDF_StreamContentParser::Handle_LineTo() {
@@ -1009,24 +1004,16 @@ void CPDF_StreamContentParser::Handle_SetRGBColor_Fill() {
   if (m_ParamCount != 3)
     return;
 
-  float values[3];
-  for (int i = 0; i < 3; i++) {
-    values[i] = GetNumber(2 - i);
-  }
   CPDF_ColorSpace* pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICERGB);
-  m_pCurStates->m_ColorState.SetFillColor(pCS, values, 3);
+  m_pCurStates->m_ColorState.SetFillColor(pCS, GetNumbers(3));
 }
 
 void CPDF_StreamContentParser::Handle_SetRGBColor_Stroke() {
   if (m_ParamCount != 3)
     return;
 
-  float values[3];
-  for (int i = 0; i < 3; i++) {
-    values[i] = GetNumber(2 - i);
-  }
   CPDF_ColorSpace* pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICERGB);
-  m_pCurStates->m_ColorState.SetStrokeColor(pCS, values, 3);
+  m_pCurStates->m_ColorState.SetStrokeColor(pCS, GetNumbers(3));
 }
 
 void CPDF_StreamContentParser::Handle_SetRenderIntent() {}
@@ -1041,27 +1028,13 @@ void CPDF_StreamContentParser::Handle_StrokePath() {
 }
 
 void CPDF_StreamContentParser::Handle_SetColor_Fill() {
-  float values[4];
-  int nargs = m_ParamCount;
-  if (nargs > 4) {
-    nargs = 4;
-  }
-  for (int i = 0; i < nargs; i++) {
-    values[i] = GetNumber(nargs - i - 1);
-  }
-  m_pCurStates->m_ColorState.SetFillColor(nullptr, values, nargs);
+  int nargs = std::min(m_ParamCount, 4U);
+  m_pCurStates->m_ColorState.SetFillColor(nullptr, GetNumbers(nargs));
 }
 
 void CPDF_StreamContentParser::Handle_SetColor_Stroke() {
-  float values[4];
-  int nargs = m_ParamCount;
-  if (nargs > 4) {
-    nargs = 4;
-  }
-  for (int i = 0; i < nargs; i++) {
-    values[i] = GetNumber(nargs - i - 1);
-  }
-  m_pCurStates->m_ColorState.SetStrokeColor(nullptr, values, nargs);
+  int nargs = std::min(m_ParamCount, 4U);
+  m_pCurStates->m_ColorState.SetStrokeColor(nullptr, GetNumbers(nargs));
 }
 
 void CPDF_StreamContentParser::Handle_SetColorPS_Fill() {
@@ -1070,9 +1043,7 @@ void CPDF_StreamContentParser::Handle_SetColorPS_Fill() {
     return;
 
   if (!pLastParam->IsName()) {
-    std::vector<float> values = GetColors();
-    m_pCurStates->m_ColorState.SetFillColor(nullptr, values.data(),
-                                            values.size());
+    m_pCurStates->m_ColorState.SetFillColor(nullptr, GetColors());
     return;
   }
 
@@ -1089,9 +1060,7 @@ void CPDF_StreamContentParser::Handle_SetColorPS_Stroke() {
     return;
 
   if (!pLastParam->IsName()) {
-    std::vector<float> values = GetColors();
-    m_pCurStates->m_ColorState.SetStrokeColor(nullptr, values.data(),
-                                              values.size());
+    m_pCurStates->m_ColorState.SetStrokeColor(nullptr, GetColors());
     return;
   }
 
diff --git a/core/fpdfapi/page/cpdf_streamcontentparser.h b/core/fpdfapi/page/cpdf_streamcontentparser.h
index 2711a39918..438be024cc 100644
--- a/core/fpdfapi/page/cpdf_streamcontentparser.h
+++ b/core/fpdfapi/page/cpdf_streamcontentparser.h
@@ -92,6 +92,9 @@ class CPDF_StreamContentParser {
   CPDF_Object* GetObject(uint32_t index);
   ByteString GetString(uint32_t index) const;
   float GetNumber(uint32_t index) const;
+  // Calls GetNumber() |count| times and returns the values in reverse order.
+  // e.g. for |count| = 3, returns [GetNumber(2), GetNumber(1), GetNumber(0)].
+  std::vector<float> GetNumbers(size_t count) const;
   int GetInteger(uint32_t index) const {
     return static_cast<int>(GetNumber(index));
   }