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-rw-r--r--include/gpu/GrTypes.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/gpu/GrTypes.h b/include/gpu/GrTypes.h
index 1986a4e75f..e5908de4e0 100644
--- a/include/gpu/GrTypes.h
+++ b/include/gpu/GrTypes.h
@@ -269,7 +269,9 @@ static inline int GrMaskFormatBytesPerPixel(GrMaskFormat format) {
/**
* Pixel configurations.
* Unpremultiplied configs are intended for conversion out from skia. They are
- * not supported as input (e.g. drawBitmap or a bitmap shader).
+ * not supported as input (e.g. drawBitmap or a bitmap shader). When used a
+ * render target config only draws that use blend coeffs 1,0 (AKA src-mode)
+ * will succeed.
*/
enum GrPixelConfig {
kUnknown_GrPixelConfig,