Implemented transparent gradients

src/pdf/SkPDFUtils.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkData.h"
 #include "SkGeometry.h"
 #include "SkPaint.h"
 #include "SkPath.h"
 #include "SkPDFResourceDict.h"
 #include "SkPDFUtils.h"
 #include "SkStream.h"
 #include "SkString.h"
 #include "SkPDFTypes.h"
 
+//static
+SkPDFArray* SkPDFUtils::RectToArray(const SkRect& rect) {
+    SkPDFArray* result = new SkPDFArray();
+    result->reserve(4);
+    result->appendScalar(rect.fLeft);
+    result->appendScalar(rect.fTop);
+    result->appendScalar(rect.fRight);
+    result->appendScalar(rect.fBottom);
+    return result;
+}
+
 // static
 SkPDFArray* SkPDFUtils::MatrixToArray(const SkMatrix& matrix) {
     SkScalar values[6];
     if (!matrix.asAffine(values)) {
         SkMatrix::SetAffineIdentity(values);
     }
 
     SkPDFArray* result = new SkPDFArray;
     result->reserve(6);
     for (size_t i = 0; i < SK_ARRAY_COUNT(values); i++) {
@@ skipping 185 matching lines @@
 }
 
 // static
 void SkPDFUtils::ApplyGraphicState(int objectIndex, SkWStream* content) {
     content->writeText("/");
     content->writeText(SkPDFResourceDict::getResourceName(
             SkPDFResourceDict::kExtGState_ResourceType,
             objectIndex).c_str());
     content->writeText(" gs\n");
 }
+
+// static
+void SkPDFUtils::ApplyPattern(int objectIndex, SkWStream* content) {
+    // Select Pattern color space (CS, cs) and set pattern object as current
+    // color (SCN, scn)
+    SkString resourceName = SkPDFResourceDict::getResourceName(
+            SkPDFResourceDict::kPattern_ResourceType,
+            objectIndex);
+    content->writeText("/Pattern CS/Pattern cs/");
+    content->writeText(resourceName.c_str());
+    content->writeText(" SCN/");
+    content->writeText(resourceName.c_str());
+    content->writeText(" scn\n");
+}