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

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

1 files changed, 17 insertions, 0 deletions

diff --git a/src/ports/SkImageDecoder_empty.cpp b/src/ports/SkImageDecoder_empty.cpp
index 11c3db1afc..94d4eb51de 100644
--- a/src/ports/SkImageDecoder_empty.cpp
+++ b/src/ports/SkImageDecoder_empty.cpp
@@ -108,6 +108,10 @@ SkData* SkImageEncoder::EncodeData(const SkImageInfo&, const void* pixels, size_
     return nullptr;
 }
 
+static SkData* SkImageEncoder::EncodeData(const SkPixmap&, Type, int) {
+    return nullptr;
+}
+
 bool SkImageEncoder::encodeStream(SkWStream*, const SkBitmap&, int) {
     return false;
 }
@@ -119,4 +123,17 @@ 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& pmap) override { return nullptr; }
+};
+}  // namespace
+
+SkPixelSerializer* SkImageEncoder::CreatePixelSerializer() {
+    return new ImageEncoderPixelSerializer;
+}
+
 /////////////////////////////////////////////////////////////////////////