Added public API FPDFPath_GetStrokeColor

There is already public APIs for SetFillColor, GetFillColor, and
SetStrokeColor; this is the only one missing.
This function is helpful to have when extracting path information from
annotations.

Change-Id: I2bf80a1dc5433e65bbb1d005c0e609d01c9133be
Reviewed-on: https://pdfium-review.googlesource.com/6710
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>

1 files changed, 26 insertions, 8 deletions

diff --git a/fpdfsdk/fpdfeditpath.cpp b/fpdfsdk/fpdfeditpath.cpp
index 3a0a296cdf..6235210113 100644
--- a/fpdfsdk/fpdfeditpath.cpp
+++ b/fpdfsdk/fpdfeditpath.cpp
@@ -52,7 +52,7 @@ DLLEXPORT FPDF_BOOL FPDFPath_SetStrokeColor(FPDF_PAGEOBJECT path,
     return false;
 
   float rgb[3] = {R / 255.f, G / 255.f, B / 255.f};
-  auto* pPathObj = static_cast<CPDF_PathObject*>(path);
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
   pPathObj->m_GeneralState.SetStrokeAlpha(A / 255.f);
   pPathObj->m_ColorState.SetStrokeColor(
       CPDF_ColorSpace::GetStockCS(PDFCS_DEVICERGB), rgb, 3);
@@ -60,11 +60,29 @@ DLLEXPORT FPDF_BOOL FPDFPath_SetStrokeColor(FPDF_PAGEOBJECT path,
   return true;
 }
 
+DLLEXPORT FPDF_BOOL FPDFPath_GetStrokeColor(FPDF_PAGEOBJECT path,
+                                            unsigned int* R,
+                                            unsigned int* G,
+                                            unsigned int* B,
+                                            unsigned int* A) {
+  if (!path || !R || !G || !B || !A)
+    return false;
+
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
+  uint32_t strokeRGB = pPathObj->m_ColorState.GetStrokeRGB();
+  *R = FXSYS_GetRValue(strokeRGB);
+  *G = FXSYS_GetGValue(strokeRGB);
+  *B = FXSYS_GetBValue(strokeRGB);
+  *A = static_cast<unsigned int>(pPathObj->m_GeneralState.GetStrokeAlpha() *
+                                 255.f);
+  return true;
+}
+
 DLLEXPORT FPDF_BOOL FPDFPath_SetStrokeWidth(FPDF_PAGEOBJECT path, float width) {
   if (!path || width < 0.0f)
     return false;
 
-  auto* pPathObj = static_cast<CPDF_PathObject*>(path);
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
   pPathObj->m_GraphState.SetLineWidth(width);
   pPathObj->SetDirty(true);
   return true;
@@ -86,7 +104,7 @@ DLLEXPORT FPDF_BOOL FPDFPath_GetFillColor(FPDF_PAGEOBJECT path,
   if (!path || !R || !G || !B || !A)
     return false;
 
-  auto* pPathObj = static_cast<CPDF_PathObject*>(path);
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
   uint32_t fillRGB = pPathObj->m_ColorState.GetFillRGB();
   *R = FXSYS_GetRValue(fillRGB);
   *G = FXSYS_GetGValue(fillRGB);
@@ -100,7 +118,7 @@ DLLEXPORT FPDF_BOOL FPDFPath_MoveTo(FPDF_PAGEOBJECT path, float x, float y) {
   if (!path)
     return false;
 
-  auto* pPathObj = static_cast<CPDF_PathObject*>(path);
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
   pPathObj->m_Path.AppendPoint(CFX_PointF(x, y), FXPT_TYPE::MoveTo, false);
   pPathObj->SetDirty(true);
   return true;
@@ -110,7 +128,7 @@ DLLEXPORT FPDF_BOOL FPDFPath_LineTo(FPDF_PAGEOBJECT path, float x, float y) {
   if (!path)
     return false;
 
-  auto* pPathObj = static_cast<CPDF_PathObject*>(path);
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
   pPathObj->m_Path.AppendPoint(CFX_PointF(x, y), FXPT_TYPE::LineTo, false);
   pPathObj->SetDirty(true);
   return true;
@@ -126,7 +144,7 @@ DLLEXPORT FPDF_BOOL FPDFPath_BezierTo(FPDF_PAGEOBJECT path,
   if (!path)
     return false;
 
-  auto* pPathObj = static_cast<CPDF_PathObject*>(path);
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
   pPathObj->m_Path.AppendPoint(CFX_PointF(x1, y1), FXPT_TYPE::BezierTo, false);
   pPathObj->m_Path.AppendPoint(CFX_PointF(x2, y2), FXPT_TYPE::BezierTo, false);
   pPathObj->m_Path.AppendPoint(CFX_PointF(x3, y3), FXPT_TYPE::BezierTo, false);
@@ -138,7 +156,7 @@ DLLEXPORT FPDF_BOOL FPDFPath_Close(FPDF_PAGEOBJECT path) {
   if (!path)
     return false;
 
-  auto* pPathObj = static_cast<CPDF_PathObject*>(path);
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
   if (pPathObj->m_Path.GetPoints().empty())
     return false;
 
@@ -153,7 +171,7 @@ DLLEXPORT FPDF_BOOL FPDFPath_SetDrawMode(FPDF_PAGEOBJECT path,
   if (!path)
     return false;
 
-  auto* pPathObj = static_cast<CPDF_PathObject*>(path);
+  auto* pPathObj = CPDFPathObjectFromFPDFPageObject(path);
 
   if (fillmode == FPDF_FILLMODE_ALTERNATE)
     pPathObj->m_FillType = FXFILL_ALTERNATE;