Add SkEncodedInfo to report properties of encoded image data

All this does is build an SkEncodedInfo for each codec, and
then convert it to an SkImageInfo.

In future steps I intend to:
(1) Use SkEncodedInfo in place of SrcConfig in SkSwizzler.
(2) Support more conversions in SkSwizzler (non-native
BGRA/RGBA, 16-bit components, float, fixed point)
(3) Investigate optimizing conversions from encoded data
to linear color spaces.

BUG=skia:4133
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1820073002

Committed: https://skia.googlesource.com/skia/+/f682d9ad70d690a343bc15e26ef321d86770be41

Review URL: https://codereview.chromium.org/1820073002

1 files changed, 11 insertions, 3 deletions

diff --git a/src/codec/SkJpegDecoderMgr.cpp b/src/codec/SkJpegDecoderMgr.cpp
index 63228bb585..8517e0dac2 100644
--- a/src/codec/SkJpegDecoderMgr.cpp
+++ b/src/codec/SkJpegDecoderMgr.cpp
@@ -35,12 +35,20 @@ SkCodec::Result JpegDecoderMgr::returnFailure(const char caller[], SkCodec::Resu
     return result;
 }
 
-SkColorType JpegDecoderMgr::getColorType() {
+SkEncodedInfo::Color JpegDecoderMgr::getEncodedColor() {
     switch (fDInfo.jpeg_color_space) {
         case JCS_GRAYSCALE:
-            return kGray_8_SkColorType;
+            return SkEncodedInfo::kGray_Color;
+        case JCS_YCbCr:
+            return SkEncodedInfo::kYUV_Color;
+        case JCS_RGB:
+            return SkEncodedInfo::kRGB_Color;
+        case JCS_YCCK:
+            return SkEncodedInfo::kYCCK_Color;
+        case JCS_CMYK:
+            return SkEncodedInfo::kInvertedCMYK_Color;
         default:
-            return kN32_SkColorType;
+            return SkEncodedInfo::kUnknown_Color;
     }
 }