Move SkCodec::Origin into its own file

It is now used by SkPixmap and will soon be in SkJpegEncoder. No need
for those to depend on SkCodec.

Bug: 768878
TBR=reed@google.com
(reed@ already approved the API change in
https://skia-review.googlesource.com/60721)
Change-Id: If1a6e1d5b60a7a3d8c97818e15a48d28ba804668
Reviewed-on: https://skia-review.googlesource.com/61680
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
diff --git a/src/codec/SkCodec.cpp b/src/codec/SkCodec.cpp
index c3d99f2..59978c6 100644
--- a/src/codec/SkCodec.cpp
+++ b/src/codec/SkCodec.cpp
@@ -128,7 +128,7 @@
 
 SkCodec::SkCodec(int width, int height, const SkEncodedInfo& info,
         XformFormat srcFormat, std::unique_ptr<SkStream> stream,
-        sk_sp<SkColorSpace> colorSpace, Origin origin)
+        sk_sp<SkColorSpace> colorSpace, SkEncodedOrigin origin)
     : fEncodedInfo(info)
     , fSrcInfo(info.makeImageInfo(width, height, std::move(colorSpace)))
     , fSrcXformFormat(srcFormat)
@@ -142,7 +142,8 @@
 {}
 
 SkCodec::SkCodec(const SkEncodedInfo& info, const SkImageInfo& imageInfo,
-        XformFormat srcFormat, std::unique_ptr<SkStream> stream, Origin origin)
+        XformFormat srcFormat, std::unique_ptr<SkStream> stream,
+        SkEncodedOrigin origin)
     : fEncodedInfo(info)
     , fSrcInfo(imageInfo)
     , fSrcXformFormat(srcFormat)
diff --git a/src/codec/SkCodecImageGenerator.cpp b/src/codec/SkCodecImageGenerator.cpp
index e8d7d30..741c8e3 100644
--- a/src/codec/SkCodecImageGenerator.cpp
+++ b/src/codec/SkCodecImageGenerator.cpp
@@ -15,23 +15,23 @@
 #define kSwapXY     SkPixmapPriv::kSwapXY
 
 const uint8_t gOrientationFlags[] = {
-    0,                              // kTopLeft_Origin
-    kMirrorX,                       // kTopRight_Origin
-    kMirrorX | kMirrorY,            // kBottomRight_Origin
-               kMirrorY,            // kBottomLeft_Origin
-                          kSwapXY,  // kLeftTop_Origin
-    kMirrorX            | kSwapXY,  // kRightTop_Origin
-    kMirrorX | kMirrorY | kSwapXY,  // kRightBottom_Origin
-               kMirrorY | kSwapXY,  // kLeftBottom_Origin
+    0,                              // kTopLeft_SkEncodedOrigin
+    kMirrorX,                       // kTopRight_SkEncodedOrigin
+    kMirrorX | kMirrorY,            // kBottomRight_SkEncodedOrigin
+               kMirrorY,            // kBottomLeft_SkEncodedOrigin
+                          kSwapXY,  // kLeftTop_SkEncodedOrigin
+    kMirrorX            | kSwapXY,  // kRightTop_SkEncodedOrigin
+    kMirrorX | kMirrorY | kSwapXY,  // kRightBottom_SkEncodedOrigin
+               kMirrorY | kSwapXY,  // kLeftBottom_SkEncodedOrigin
 };
 
-SkPixmapPriv::OrientFlags SkPixmapPriv::OriginToOrient(SkCodec::Origin o) {
+SkPixmapPriv::OrientFlags SkPixmapPriv::OriginToOrient(SkEncodedOrigin o) {
     unsigned io = static_cast<int>(o) - 1;
     SkASSERT(io < SK_ARRAY_COUNT(gOrientationFlags));
     return static_cast<SkPixmapPriv::OrientFlags>(gOrientationFlags[io]);
 }
 
-static bool should_swap_width_height(SkCodec::Origin o) {
+static bool should_swap_width_height(SkEncodedOrigin o) {
     return SkToBool(SkPixmapPriv::OriginToOrient(o) & kSwapXY);
 }
 
@@ -73,12 +73,12 @@
 
 bool SkCodecImageGenerator::onGetPixels(const SkImageInfo& requestInfo, void* requestPixels,
                                         size_t requestRowBytes, const Options& opts) {
-    const SkCodec::Origin origin = fCodec->getOrigin();
+    const auto origin = fCodec->getOrigin();
     const SkPixmap request(requestInfo, requestPixels, requestRowBytes);
     const SkPixmap* codecMap = &request;
     SkAutoPixmapStorage storage;    // used if we have to post-orient the output from the codec
 
-    if (origin != SkCodec::kTopLeft_Origin) {
+    if (origin != kTopLeft_SkEncodedOrigin) {
         SkImageInfo info = requestInfo;
         if (should_swap_width_height(origin)) {
             info = swap_width_height(info);
diff --git a/src/codec/SkJpegCodec.cpp b/src/codec/SkJpegCodec.cpp
index be5c9f7..062f05b 100644
--- a/src/codec/SkJpegCodec.cpp
+++ b/src/codec/SkJpegCodec.cpp
@@ -45,7 +45,7 @@
 const uint32_t kExifHeaderSize = 14;
 const uint32_t kExifMarker = JPEG_APP0 + 1;
 
-static bool is_orientation_marker(jpeg_marker_struct* marker, SkCodec::Origin* orientation) {
+static bool is_orientation_marker(jpeg_marker_struct* marker, SkEncodedOrigin* orientation) {
     if (kExifMarker != marker->marker || marker->data_length < kExifHeaderSize) {
         return false;
     }
@@ -87,8 +87,8 @@
         uint32_t count = get_endian_int(data + 4, littleEndian);
         if (kOriginTag == tag && kOriginType == type && 1 == count) {
             uint16_t val = get_endian_short(data + 8, littleEndian);
-            if (0 < val && val <= SkCodec::kLast_Origin) {
-                *orientation = (SkCodec::Origin) val;
+            if (0 < val && val <= kLast_SkEncodedOrigin) {
+                *orientation = (SkEncodedOrigin) val;
                 return true;
             }
         }
@@ -97,15 +97,15 @@
     return false;
 }
 
-static SkCodec::Origin get_exif_orientation(jpeg_decompress_struct* dinfo) {
-    SkCodec::Origin orientation;
+static SkEncodedOrigin get_exif_orientation(jpeg_decompress_struct* dinfo) {
+    SkEncodedOrigin orientation;
     for (jpeg_marker_struct* marker = dinfo->marker_list; marker; marker = marker->next) {
         if (is_orientation_marker(marker, &orientation)) {
             return orientation;
         }
     }
 
-    return SkCodec::kDefault_Origin;
+    return kDefault_SkEncodedOrigin;
 }
 
 static bool is_icc_marker(jpeg_marker_struct* marker) {
@@ -227,7 +227,7 @@
         // Create image info object and the codec
         SkEncodedInfo info = SkEncodedInfo::Make(color, SkEncodedInfo::kOpaque_Alpha, 8);
 
-        Origin orientation = get_exif_orientation(decoderMgr->dinfo());
+        SkEncodedOrigin orientation = get_exif_orientation(decoderMgr->dinfo());
         sk_sp<SkData> iccData = get_icc_profile(decoderMgr->dinfo());
         sk_sp<SkColorSpace> colorSpace = nullptr;
         if (iccData) {
@@ -284,7 +284,7 @@
 
 SkJpegCodec::SkJpegCodec(int width, int height, const SkEncodedInfo& info,
                          std::unique_ptr<SkStream> stream, JpegDecoderMgr* decoderMgr,
-                         sk_sp<SkColorSpace> colorSpace, Origin origin)
+                         sk_sp<SkColorSpace> colorSpace, SkEncodedOrigin origin)
     : INHERITED(width, height, info, SkColorSpaceXform::kRGBA_8888_ColorFormat, std::move(stream),
                 std::move(colorSpace), origin)
     , fDecoderMgr(decoderMgr)
diff --git a/src/codec/SkJpegCodec.h b/src/codec/SkJpegCodec.h
index fd8ee63..41814d2 100644
--- a/src/codec/SkJpegCodec.h
+++ b/src/codec/SkJpegCodec.h
@@ -107,7 +107,7 @@
      *                   takes ownership
      */
     SkJpegCodec(int width, int height, const SkEncodedInfo& info, std::unique_ptr<SkStream> stream,
-            JpegDecoderMgr* decoderMgr, sk_sp<SkColorSpace> colorSpace, Origin origin);
+            JpegDecoderMgr* decoderMgr, sk_sp<SkColorSpace> colorSpace, SkEncodedOrigin origin);
 
     /*
      * Checks if the conversion between the input image and the requested output
diff --git a/src/core/SkPixmapPriv.h b/src/core/SkPixmapPriv.h
index dfc9ce2..1d677fd 100644
--- a/src/core/SkPixmapPriv.h
+++ b/src/core/SkPixmapPriv.h
@@ -9,7 +9,7 @@
 #define SkPixmapPriv_DEFINED
 
 #include "SkPixmap.h"
-#include "SkCodec.h"
+#include "SkEncodedOrigin.h"
 
 class SkPixmapPriv {
 public:
@@ -20,7 +20,7 @@
         kSwapXY  = 1 << 2,
     };
 
-    static OrientFlags OriginToOrient(SkCodec::Origin);
+    static OrientFlags OriginToOrient(SkEncodedOrigin);
 
     /**
      *  Copy the pixels in this pixmap into dst, applying the orientation transformations specified