Give names to the shading types

Currently the shading types are referenced by number. This Cl creates and enum
and updates the code to use the enum names instead of magic numbers.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1418623011 .

1 files changed, 12 insertions, 11 deletions

diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
index b12a65a844..3057948959 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
@@ -1092,12 +1092,13 @@ void CPDF_StreamContentParser::Handle_SetColorPS_Stroke() {
   }
   FX_Free(values);
 }
-CFX_FloatRect _GetShadingBBox(CPDF_Stream* pStream,
-                              int type,
-                              const CFX_AffineMatrix* pMatrix,
-                              CPDF_Function** pFuncs,
-                              int nFuncs,
-                              CPDF_ColorSpace* pCS);
+CFX_FloatRect GetShadingBBox(CPDF_Stream* pStream,
+                             ShadingType type,
+                             const CFX_AffineMatrix* pMatrix,
+                             CPDF_Function** pFuncs,
+                             int nFuncs,
+                             CPDF_ColorSpace* pCS);
+
 void CPDF_StreamContentParser::Handle_ShadeFill() {
   if (m_Options.m_bTextOnly) {
     return;
@@ -1127,11 +1128,11 @@ void CPDF_StreamContentParser::Handle_ShadeFill() {
   } else {
     bbox = m_BBox;
   }
-  if (pShading->m_ShadingType >= 4) {
-    bbox.Intersect(_GetShadingBBox(ToStream(pShading->m_pShadingObj),
-                                   pShading->m_ShadingType, &pObj->m_Matrix,
-                                   pShading->m_pFunctions, pShading->m_nFuncs,
-                                   pShading->m_pCS));
+  if (pShading->IsMeshShading()) {
+    bbox.Intersect(GetShadingBBox(ToStream(pShading->m_pShadingObj),
+                                  pShading->m_ShadingType, &pObj->m_Matrix,
+                                  pShading->m_pFunctions, pShading->m_nFuncs,
+                                  pShading->m_pCS));
   }
   pObj->m_Left = bbox.left;
   pObj->m_Right = bbox.right;