SkPDF: Draw paths with mask filters; color filter.

Also:
  - drawPaint, drawPath w/ perspective shaders
  - text with mask filters, stroking, path effect.
  - SkPDFUtils::GetShaderLocalMatrix

BUG=skia:237
BUG=skia:238
BUG=skia:5607
Change-Id: Iffeaf2d7abbde13fd2577ce9feaa178657f48364
Reviewed-on: https://skia-review.googlesource.com/18200
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/pdf/SkPDFUtils.h b/src/pdf/SkPDFUtils.h
index 00c4b72b7b..c1d9a72250 100644
--- a/src/pdf/SkPDFUtils.h
+++ b/src/pdf/SkPDFUtils.h
@@ -11,6 +11,7 @@
 
 #include "SkPaint.h"
 #include "SkPath.h"
+#include "SkShader.h"
 #include "SkStream.h"
 #include "SkUtils.h"
 
@@ -111,6 +112,14 @@ static sk_sp<T> GetCachedT(sk_sp<T>* cachedT, sk_sp<T> (*makeNewT)()) {
     *cachedT = (*makeNewT)();
     return *cachedT;
 }
+
+inline SkMatrix GetShaderLocalMatrix(const SkShader* shader) {
+    SkMatrix localMatrix;
+    if (sk_sp<SkShader> s = shader->makeAsALocalMatrixShader(&localMatrix)) {
+        return SkMatrix::Concat(s->getLocalMatrix(), localMatrix);
+    }
+    return shader->getLocalMatrix();
+}
 }  // namespace SkPDFUtils
 
 #endif