add watermark test (#212)

PDFWriterTesting/CMakeLists.txt

@@ -65,6 +65,7 @@ create_test_sourcelist (Tests
   Type1Test.cpp
   UnicodeTextUsage.cpp
   UppercaseSequanceTest.cpp
+  WatermarkTest.cpp
 )
 
 # add the testing executable

PDFWriterTesting/WatermarkTest.cpp

@@ -0,0 +1,106 @@
+/*
+   Source File : WatermarkTest.cpp
+
+
+   Copyright 2011 Gal Kahana PDFWriter
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+   
+*/
+
+#include "PDFWriter.h"
+#include "DictionaryContext.h"
+#include "PDFPage.h"
+#include "PageContentContext.h"
+
+#include <iostream>
+
+#include "testing/TestIO.h"
+
+using namespace std;
+using namespace PDFHummus;
+
+int WatermarkTest(int argc, char* argv[])
+{
+    PDFWriter pdfWriter;
+	EStatusCode status; 
+
+	do
+	{
+		status = pdfWriter.StartPDF(
+            BuildRelativeOutputPath(argv, "WatermarkTest.pdf"), 
+            ePDFVersion14,         
+            LogConfiguration::DefaultLogConfiguration(),
+		    PDFCreationSettings(false, true)
+        );
+		if (status != PDFHummus::eSuccess)
+		{
+			cout << "failed to start PDF\n";
+			break;
+		}
+
+        ObjectsContext& objCtx = pdfWriter.GetObjectsContext();
+        ObjectIDType gsID = objCtx.StartNewIndirectObject();
+        DictionaryContext* dict = objCtx.StartDictionary();
+        dict->WriteKey("type");
+        dict->WriteNameValue("ExtGState");
+        dict->WriteKey("ca");
+        dict->WriteDoubleValue(0.5);
+        objCtx.EndDictionary(dict);
+        objCtx.EndIndirectObject();
+
+        PDFPage* page = new PDFPage();
+        page->SetMediaBox(PDFRectangle(0,0,595,842));
+        std::string gsName = page->GetResourcesDictionary().AddExtGStateMapping(gsID);
+
+        PageContentContext* pageContentContext = pdfWriter.StartPageContentContext(page);
+		if (NULL == pageContentContext)
+		{
+			status = PDFHummus::eFailure;
+			cout << "failed to create content context for page\n";
+            break;
+		}
+
+
+        // background so we can see the transparency
+		AbstractContentContext::GraphicOptions pathFillOptions(AbstractContentContext::eFill,
+																AbstractContentContext::eCMYK,
+																0xFF00FF00);        
+        pageContentContext->DrawRectangle(50,400,200,200,pathFillOptions);
+
+        // some transparent text
+        pageContentContext->q();
+        pageContentContext->gs(gsName);
+        pageContentContext->BT();
+        pageContentContext->k(0, 100, 100, 0);
+        PDFUsedFont* font = pdfWriter.GetFontForFile(BuildRelativeInputPath(argv,"fonts/arial.ttf"));
+        pageContentContext->Tf(font, 30);
+        pageContentContext->Tm(1,0,0,1,100,500);
+        pageContentContext->Tj("Test Text");
+        pageContentContext->ET();
+
+        // some more text, using higher level commands
+		AbstractContentContext::TextOptions textOptions(font,14,AbstractContentContext::eCMYK,0x00FFFF00);        
+        pageContentContext->WriteText(100,550,"some more text", textOptions);
+
+        pageContentContext->Q();
+
+        pdfWriter.EndPageContentContext(pageContentContext);
+        pdfWriter.WritePageAndRelease(page);
+        pdfWriter.EndPDF();
+
+	}while(false);
+
+	return status == eSuccess ? 0:1;	
+}