SkImageEncoder: simplify API

(re-land 248ff02 & 2cb6cb7, with changes)

  - Hide SkImageEncoder class in private header.
  - SkImageEncoder::Type becomes SkEncodedImageFormat
  - SkEncodedFormat becomes SkEncodedImageFormat
  - SkImageEncoder static functions replaced with
    single function EncodeImage()
  - utility wrappers for EncodeImage() are in
    sk_tool_utils.h

TODO: remove link-time registration mechanism.
TODO: clean up clients use of API and flip the flag.
TODO: implement EncodeImage() in chromeium/skia/ext

Change-Id: I47d451e50be4d5c6c130869c7fa7c2857243d9f0
Reviewed-on: https://skia-review.googlesource.com/4909
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
Reviewed-on: https://skia-review.googlesource.com/5186
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>

1 files changed, 13 insertions, 12 deletions

diff --git a/src/image/SkImage.cpp b/src/image/SkImage.cpp
index 3487b7d927..e0436815a7 100644
--- a/src/image/SkImage.cpp
+++ b/src/image/SkImage.cpp
@@ -103,27 +103,22 @@ sk_sp<SkShader> SkImage::makeShader(SkShader::TileMode tileX, SkShader::TileMode
     return SkImageShader::Make(sk_ref_sp(const_cast<SkImage*>(this)), tileX, tileY, localMatrix);
 }
 
-SkData* SkImage::encode(SkImageEncoder::Type type, int quality) const {
+SkData* SkImage::encode(SkEncodedImageFormat type, int quality) const {
     SkBitmap bm;
     // TODO: Right now, the encoders don't handle F16 or linearly premultiplied data. Once they do,
     // we should decode in "color space aware" mode, then re-encode that. For now, work around this
     // by asking for a legacy decode (which gives us the raw data in N32).
     if (as_IB(this)->getROPixels(&bm, SkDestinationSurfaceColorMode::kLegacy)) {
-        return SkImageEncoder::EncodeData(bm, type, quality);
+        SkDynamicMemoryWStream buf;
+        return SkEncodeImage(&buf, bm, type, quality) ? buf.detachAsData().release() : nullptr;
     }
     return nullptr;
 }
 
 SkData* SkImage::encode(SkPixelSerializer* serializer) const {
-    sk_sp<SkPixelSerializer> defaultSerializer;
-    SkPixelSerializer* effectiveSerializer = serializer;
-    if (!effectiveSerializer) {
-        defaultSerializer.reset(SkImageEncoder::CreatePixelSerializer());
-        SkASSERT(defaultSerializer.get());
-        effectiveSerializer = defaultSerializer.get();
-    }
     sk_sp<SkData> encoded(this->refEncoded());
-    if (encoded && effectiveSerializer->useEncodedData(encoded->data(), encoded->size())) {
+    if (encoded &&
+        (!serializer || serializer->useEncodedData(encoded->data(), encoded->size()))) {
         return encoded.release();
     }
 
@@ -134,7 +129,13 @@ SkData* SkImage::encode(SkPixelSerializer* serializer) const {
     // by asking for a legacy decode (which gives us the raw data in N32).
     if (as_IB(this)->getROPixels(&bm, SkDestinationSurfaceColorMode::kLegacy) &&
         bm.requestLock(&apu)) {
-        return effectiveSerializer->encode(apu.pixmap());
+        if (serializer) {
+            return serializer->encode(apu.pixmap());
+        } else {
+            SkDynamicMemoryWStream buf;
+            return SkEncodeImage(&buf, apu.pixmap(), SkEncodedImageFormat::kPNG, 100)
+                   ? buf.detachAsData().release() : nullptr;
+        }
     }
 
     return nullptr;
@@ -188,7 +189,7 @@ GrBackendObject SkImage::getTextureHandle(bool flushPendingGrContextIO) const {
     GrTexture* texture = as_IB(this)->peekTexture();
     if (texture) {
         GrContext* context = texture->getContext();
-        if (context) {            
+        if (context) {
             if (flushPendingGrContextIO) {
                 context->prepareSurfaceForExternalIO(texture);
             }