add ptr/len and SkData versions of Deflate()

git-svn-id: http://skia.googlecode.com/svn/trunk@1726 2bbb7eff-a529-9590-31e7-b0007b416f81

2 files changed, 31 insertions, 3 deletions

diff --git a/include/core/SkFlate.h b/include/core/SkFlate.h
index ef76f68450..38f0fd1724 100644
--- a/include/core/SkFlate.h
+++ b/include/core/SkFlate.h
@@ -19,6 +19,7 @@
 
 #include "SkTypes.h"
 
+class SkData;
 class SkWStream;
 class SkStream;
 
@@ -31,11 +32,24 @@ public:
      */
     static bool HaveFlate();
 
-    /** Use the flate compression algorithm to compress the data in src,
-        putting the result into dst.  Returns false if an error occurs.
+    /**
+     *  Use the flate compression algorithm to compress the data in src,
+     *  putting the result into dst.  Returns false if an error occurs.
      */
     static bool Deflate(SkStream* src, SkWStream* dst);
-
+    
+    /**
+     *  Use the flate compression algorithm to compress the data in src,
+     *  putting the result into dst.  Returns false if an error occurs.
+     */
+    static bool Deflate(const void* src, size_t len, SkWStream* dst);
+    
+    /**
+     *  Use the flate compression algorithm to compress the data,
+     *  putting the result into dst.  Returns false if an error occurs.
+     */
+    static bool Deflate(const SkData*, SkWStream* dst);
+    
     /** Use the flate compression algorithm to decompress the data in src,
         putting the result into dst.  Returns false if an error occurs.
      */
diff --git a/src/core/SkFlate.cpp b/src/core/SkFlate.cpp
index 5acf2abfa0..3bae8a9334 100644
--- a/src/core/SkFlate.cpp
+++ b/src/core/SkFlate.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include "SkData.h"
 #include "SkFlate.h"
 #include "SkStream.h"
 
@@ -123,6 +124,19 @@ bool SkFlate::Deflate(SkStream* src, SkWStream* dst) {
     return doFlate(true, src, dst);
 }
 
+bool SkFlate::Deflate(const void* ptr, size_t len, SkWStream* dst) {
+    SkMemoryStream stream(ptr, len);
+    return doFlate(true, &stream, dst);
+}
+
+bool SkFlate::Deflate(const SkData* data, SkWStream* dst) {
+    if (data) {
+        SkMemoryStream stream(data->data(), data->size());
+        return doFlate(true, &stream, dst);
+    }
+    return false;
+}
+
 // static
 bool SkFlate::Inflate(SkStream* src, SkWStream* dst) {
     return doFlate(false, src, dst);