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-rw-r--r--include/core/SkPixmap.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/core/SkPixmap.h b/include/core/SkPixmap.h
index 3a7abdf134..5f90273a97 100644
--- a/include/core/SkPixmap.h
+++ b/include/core/SkPixmap.h
@@ -71,6 +71,17 @@ public:
SkIRect bounds() const { return SkIRect::MakeWH(this->width(), this->height()); }
+ /**
+ * Return the rowbytes expressed as a number of pixels (like width and height).
+ */
+ int rowBytesAsPixels() const { return int(fRowBytes >> this->shiftPerPixel()); }
+
+ /**
+ * Return the shift amount per pixel (i.e. 0 for 1-byte per pixel, 1 for 2-bytes per pixel
+ * colortypes, 2 for 4-bytes per pixel colortypes). Return 0 for kUnknown_SkColorType.
+ */
+ int shiftPerPixel() const { return fInfo.bytesPerPixel() >> 1; }
+
uint64_t getSize64() const { return sk_64_mul(fInfo.height(), fRowBytes); }
uint64_t getSafeSize64() const { return fInfo.getSafeSize64(fRowBytes); }
size_t getSafeSize() const { return fInfo.getSafeSize(fRowBytes); }