move colorshader into its own .cpp, add color4f variant
Implemented as a different subclass for SkColorShader (which is also private) partly to make the CL clearer/simpler, and partly for flatten/unflatten compatibility. Later I'm sure we could combine these if that proves useful.
Lots of TODOs at the moment, but still valuable to get reviewed.
Note: this ignores the question (for the moment) about how to interpret SkColor in the larger world. That needs to happen, but this CL is more focused on what *else* to do besides handle the old-style input (and old-style pipeline).
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1934313002
Review-Url: https://codereview.chromium.org/1934313002
diff --git a/include/core/SkShader.h b/include/core/SkShader.h
index 0de53ad..60aa7cd 100644
--- a/include/core/SkShader.h
+++ b/include/core/SkShader.h
@@ -17,6 +17,7 @@
#include "../gpu/GrColor.h"
class SkColorFilter;
+class SkColorSpace;
class SkPath;
class SkPicture;
class SkXfermode;
@@ -375,6 +376,14 @@
*/
static sk_sp<SkShader> MakeColorShader(SkColor);
+ /**
+ * Create a shader that draws the specified color (in the specified colorspace).
+ *
+ * This works around the limitation that SkPaint::setColor() only takes byte values, and does
+ * not support specific colorspaces.
+ */
+ static sk_sp<SkShader> MakeColorShader(const SkColor4f&, sk_sp<SkColorSpace>);
+
static sk_sp<SkShader> MakeComposeShader(sk_sp<SkShader> dst, sk_sp<SkShader> src,
SkXfermode::Mode);