default SkPixelSerializer

Add SkImageEncoder::EncodeData(const SkPixmap&, ...) function.

Add SkImageEncoder::CreatePixelSerializer() to return a
PixelSerializer that calls into SkImageEncoder::EncodeData.

SkImage::encode() make use of SkImageEncoder::CreatePixelSerializer.

Committed: https://skia.googlesource.com/skia/+/b0bd1516bff3f5afcbfd615e805867531657811b

Committed: https://skia.googlesource.com/skia/+/808ce2886d732b1055f89c8fb0f1b11b47fcb0ce

Review URL: https://codereview.chromium.org/1507123002

1 files changed, 18 insertions, 0 deletions

diff --git a/src/ports/SkImageDecoder_empty.cpp b/src/ports/SkImageDecoder_empty.cpp
index 11c3db1afc..f52dada73b 100644
--- a/src/ports/SkImageDecoder_empty.cpp
+++ b/src/ports/SkImageDecoder_empty.cpp
@@ -11,6 +11,7 @@
 #include "SkImageDecoder.h"
 #include "SkImageEncoder.h"
 #include "SkMovie.h"
+#include "SkPixelSerializer.h"
 #include "SkStream.h"
 
 class SkColorTable;
@@ -108,6 +109,10 @@ SkData* SkImageEncoder::EncodeData(const SkImageInfo&, const void* pixels, size_
     return nullptr;
 }
 
+SkData* SkImageEncoder::EncodeData(const SkPixmap&, Type, int) {
+    return nullptr;
+}
+
 bool SkImageEncoder::encodeStream(SkWStream*, const SkBitmap&, int) {
     return false;
 }
@@ -119,4 +124,17 @@ SkData* SkImageEncoder::encodeData(const SkBitmap&, int) {
 bool SkImageEncoder::encodeFile(const char file[], const SkBitmap& bm, int quality) {
     return false;
 }
+
+namespace {
+class ImageEncoderPixelSerializer final : public SkPixelSerializer {
+protected:
+    bool onUseEncodedData(const void*, size_t) override { return true; }
+    SkData* onEncode(const SkPixmap&) override { return nullptr; }
+};
+}  // namespace
+
+SkPixelSerializer* SkImageEncoder::CreatePixelSerializer() {
+    return new ImageEncoderPixelSerializer;
+}
+
 /////////////////////////////////////////////////////////////////////////