blitters for sRGB and float16

src/core/SkBlitter.cpp

Index: src/core/SkBlitter.cpp
diff --git a/src/core/SkBlitter.cpp b/src/core/SkBlitter.cpp
index eec31525a63548abfb3bf377d7c541c8275de09f..72694b266e939979fe95d9bf4039c64804043aa9 100644
--- a/src/core/SkBlitter.cpp
+++ b/src/core/SkBlitter.cpp
@@ -913,23 +913,27 @@ SkBlitter* SkBlitter::Choose(const SkPixmap& device,
             break;
 
         case kN32_SkColorType:
-            if (shader) {
-                if (shaderContext->supports4f() && ALLOW_SRGB) {
-                    blitter = allocator->createT<SkARGB32_Shader4f_Blitter>(
-                                                                  device, *paint, shaderContext);
+            if (device.info().isSRGB()) {
+                blitter = SkBlitter_ARGB32_Create(device, *paint, shaderContext, allocator);
+            } else {
+                if (shader) {
+                        blitter = allocator->createT<SkARGB32_Shader_Blitter>(
+                                device, *paint, shaderContext);
+                } else if (paint->getColor() == SK_ColorBLACK) {
+                    blitter = allocator->createT<SkARGB32_Black_Blitter>(device, *paint);
+                } else if (paint->getAlpha() == 0xFF) {
+                    blitter = allocator->createT<SkARGB32_Opaque_Blitter>(device, *paint);
                 } else {
-                    blitter = allocator->createT<SkARGB32_Shader_Blitter>(
-                            device, *paint, shaderContext);
+                    blitter = allocator->createT<SkARGB32_Blitter>(device, *paint);
                 }
-            } else if (paint->getColor() == SK_ColorBLACK) {
-                blitter = allocator->createT<SkARGB32_Black_Blitter>(device, *paint);
-            } else if (paint->getAlpha() == 0xFF) {
-                blitter = allocator->createT<SkARGB32_Opaque_Blitter>(device, *paint);
-            } else {
-                blitter = allocator->createT<SkARGB32_Blitter>(device, *paint);
             }
             break;
 
+        case kRGBA_F16_SkColorType:
+        // kU16_SkColorType:
+            blitter = SkBlitter_ARGB64_Create(device, *paint, shaderContext, allocator);
+            break;
+
         default:
             SkDEBUGFAIL("unsupported device config");
             blitter = allocator->createT<SkNullBlitter>();
@@ -972,6 +976,7 @@ SkShaderBlitter::SkShaderBlitter(const SkPixmap& device, const SkPaint& paint,
 
     fShader->ref();
     fShaderFlags = fShaderContext->getFlags();
+    fConstInY = SkToBool(fShaderFlags & SkShader::kConstInY32_Flag);
 }
 
 SkShaderBlitter::~SkShaderBlitter() {