Move SkYUVAIndex and SkImageSourceChannel to SkImageInfoPriv.h until used in public API

Change-Id: Ib75be2b6e9eb9b80f1f9e738bc8e3300ddc08f22
Reviewed-on: https://skia-review.googlesource.com/129927
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Cary Clark <caryclark@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/src/core/SkImagePriv.h b/src/core/SkImagePriv.h
index b0bc85efaf..7848bf4035 100644
--- a/src/core/SkImagePriv.h
+++ b/src/core/SkImagePriv.h
@@ -83,4 +83,40 @@ void SkImage_unpinAsTexture(const SkImage*, GrContext*);
  */
 sk_sp<SkImage> SkImageMakeRasterCopyAndAssignColorSpace(const SkImage*, SkColorSpace*);
 
+/** \enum SkImageInfo::SkImageSourceChannel
+    Describes different channels we could read from image source.
+*/
+enum SkImageSourceChannel {
+    /** Describes the red channel; */
+    kR_SkImageSourceChannel,
+
+    /** Describes the green channel; */
+    kG_SkImageSourceChannel,
+
+    /** Describes the blue channel; */
+    kB_SkImageSourceChannel,
+
+    /** Describes the alpha channel; */
+    kA_SkImageSourceChannel,
+
+    /** Describes the alpha channel; */
+    kLastEnum_SkImageSourceChannel = kA_SkImageSourceChannel,
+};
+
+/** \struct SkYUVAIndex
+    Describes from which image source and which channel to read each individual YUVA plane.
+
+    SkYUVAIndex contains a index for which image source to read from and a enum for which channel
+    to read from.
+*/
+struct SK_API SkYUVAIndex {
+    /** The index is a number between -1..3 which definies which image source to read from, where -1
+     * means the image source doesn't exist. The assumption is we will always have image sources for
+     * each of YUV planes, but optionally have image source for A plane. */
+    int fIndex;
+    /** The channel describes from which channel to read the info from. Currently we only deal with
+     * YUV and NV12 and channel info is ignored. */
+    SkImageSourceChannel fChannel;
+};
+
 #endif