4f linear gradient shader blitters

Add F16 specializations to support writing to half-float dests.

Add color profile template arg across the board to support writing
to sRGB dests.

R=reed@google.com,mtklein@google.com,herb@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1808963005

Review URL: https://codereview.chromium.org/1808963005

1 files changed, 10 insertions, 0 deletions

diff --git a/src/core/SkUtils.h b/src/core/SkUtils.h
index 332ea8da7e..26f19e6906 100644
--- a/src/core/SkUtils.h
+++ b/src/core/SkUtils.h
@@ -32,6 +32,16 @@ static inline void sk_memset32(uint32_t buffer[], uint32_t value, int count) {
     }
 }
 
+/** Similar to memset(), but it assigns a 64bit value into the buffer.
+    @param buffer   The memory to have value copied into it
+    @param value    The 64bit value to be copied into buffer
+    @param count    The number of times value should be copied into the buffer.
+*/
+static inline void sk_memset64(uint64_t buffer[], uint64_t value, int count) {
+    for (int i = 0; i < count; i++) {
+        buffer[i] = value;
+    }
+}
 ///////////////////////////////////////////////////////////////////////////////
 
 #define kMaxBytesInUTF8Sequence     4