From fb73bcdb998550bd537fb5e735dc71198e80c4d5 Mon Sep 17 00:00:00 2001
From: Nicolas Pena <npm@chromium.org>
Date: Wed, 13 Jun 2018 20:41:27 +0000
Subject: Remove CFX_FixedBufGrow from cpdf_colorspace.cpp
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Bug: pdfium:177
Change-Id: I92e71fd0f2445736680e1cf9e7cc41bda8e6505e
Reviewed-on: https://pdfium-review.googlesource.com/35114
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Nicolás Peña Moreno <npm@chromium.org>
---
 core/fpdfapi/page/cpdf_colorspace.cpp | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/core/fpdfapi/page/cpdf_colorspace.cpp b/core/fpdfapi/page/cpdf_colorspace.cpp
index 31c485fe03..cf1f25063f 100644
--- a/core/fpdfapi/page/cpdf_colorspace.cpp
+++ b/core/fpdfapi/page/cpdf_colorspace.cpp
@@ -31,7 +31,6 @@
 #include "core/fpdfdoc/cpdf_action.h"
 #include "core/fxcodec/codec/ccodec_iccmodule.h"
 #include "core/fxcodec/fx_codec.h"
-#include "core/fxcrt/cfx_fixedbufgrow.h"
 #include "core/fxcrt/fx_memory.h"
 #include "core/fxcrt/maybe_owned.h"
 #include "third_party/base/stl_util.h"
@@ -574,8 +573,7 @@ void CPDF_ColorSpace::TranslateImageLine(uint8_t* dest_buf,
                                          int image_width,
                                          int image_height,
                                          bool bTransMask) const {
-  CFX_FixedBufGrow<float, 16> srcbuf(m_nComponents);
-  float* src = srcbuf;
+  std::vector<float> src(m_nComponents);
   float R;
   float G;
   float B;
@@ -583,7 +581,7 @@ void CPDF_ColorSpace::TranslateImageLine(uint8_t* dest_buf,
   for (int i = 0; i < pixels; i++) {
     for (uint32_t j = 0; j < m_nComponents; j++)
       src[j] = static_cast<float>(*src_buf++) / divisor;
-    GetRGB(src, &R, &G, &B);
+    GetRGB(src.data(), &R, &G, &B);
     *dest_buf++ = static_cast<int32_t>(B * 255);
     *dest_buf++ = static_cast<int32_t>(G * 255);
     *dest_buf++ = static_cast<int32_t>(R * 255);
@@ -1153,15 +1151,15 @@ bool CPDF_IndexedCS::GetRGB(const float* pBuf,
       return false;
     }
   }
-  CFX_FixedBufGrow<float, 16> Comps(m_nBaseComponents);
-  float* comps = Comps;
+  std::vector<float> comps(m_nBaseComponents);
   const uint8_t* pTable = m_Table.raw_str();
-  for (uint32_t i = 0; i < m_nBaseComponents; i++) {
+  for (uint32_t i = 0; i < m_nBaseComponents; ++i) {
     comps[i] =
         m_pCompMinMax[i * 2] +
         m_pCompMinMax[i * 2 + 1] * pTable[index * m_nBaseComponents + i] / 255;
   }
-  return m_pBaseCS->GetRGB(comps, R, G, B);
+  ASSERT(m_nBaseComponents == m_pBaseCS->CountComponents());
+  return m_pBaseCS->GetRGB(comps.data(), R, G, B);
 }
 
 void CPDF_IndexedCS::EnableStdConversion(bool bEnabled) {
@@ -1226,19 +1224,20 @@ bool CPDF_SeparationCS::GetRGB(const float* pBuf,
       return false;
 
     int nComps = m_pAltCS->CountComponents();
-    CFX_FixedBufGrow<float, 16> results(nComps);
+    std::vector<float> results(nComps);
     for (int i = 0; i < nComps; i++)
       results[i] = *pBuf;
-    return m_pAltCS->GetRGB(results, R, G, B);
+    return m_pAltCS->GetRGB(results.data(), R, G, B);
   }
 
-  CFX_FixedBufGrow<float, 16> results(m_pFunc->CountOutputs());
+  // Using at least 16 elements due to the call m_pAltCS->GetRGB() below.
+  std::vector<float> results(std::max(m_pFunc->CountOutputs(), 16u));
   int nresults = 0;
-  if (!m_pFunc->Call(pBuf, 1, results, &nresults) || nresults == 0)
+  if (!m_pFunc->Call(pBuf, 1, results.data(), &nresults) || nresults == 0)
     return false;
 
   if (m_pAltCS)
-    return m_pAltCS->GetRGB(results, R, G, B);
+    return m_pAltCS->GetRGB(results.data(), R, G, B);
 
   R = 0;
   G = 0;
@@ -1298,14 +1297,15 @@ bool CPDF_DeviceNCS::GetRGB(const float* pBuf,
   if (!m_pFunc)
     return false;
 
-  CFX_FixedBufGrow<float, 16> results(m_pFunc->CountOutputs());
+  // Using at least 16 elements due to the call m_pAltCS->GetRGB() below.
+  std::vector<float> results(std::max(m_pFunc->CountOutputs(), 16u));
   int nresults = 0;
-  if (!m_pFunc->Call(pBuf, CountComponents(), results, &nresults) ||
+  if (!m_pFunc->Call(pBuf, CountComponents(), results.data(), &nresults) ||
       nresults == 0) {
     return false;
   }
 
-  return m_pAltCS->GetRGB(results, R, G, B);
+  return m_pAltCS->GetRGB(results.data(), R, G, B);
 }
 
 void CPDF_DeviceNCS::EnableStdConversion(bool bEnabled) {
-- 
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