add kRGBA_F16_SkColorType

src/core/SkPixmap.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkConfig8888.h"
 #include "SkData.h"
@@ skipping 189 matching lines @@
                 p = (uint32_t*)((char*)p + rowBytes);
             }
             break;
         }
         default:
             return false; // no change, so don't call notifyPixelsChanged()
     }
     return true;
 }
 
+#include "SkNx.h"
+#include "SkHalf.h"
+
+static void sk_memset64(uint64_t dst[], uint64_t value, int count) {
+    for (int i = 0; i < count; ++i) {
+        dst[i] = value;
+    }
+}
+
+bool SkPixmap::erase(const SkColor4f& origColor, const SkIRect* subset) const {
+    SkPixmap pm;
+    if (subset) {
+        if (!this->extractSubset(&pm, *subset)) {
+            return false;
+        }
+    } else {
+        pm = *this;
+    }
+
+    const SkColor4f color = origColor.pin();
+
+    if (kRGBA_F16_SkColorType != pm.colorType()) {
+        Sk4f c4 = Sk4f::Load(color.vec());
+        SkColor c;
+        (c4 * Sk4f(255) + Sk4f(0.5f)).store(&c);
+        return pm.erase(c);
+    }
+
+    const uint64_t half4 = color.premul().toF16();
+    for (int y = 0; y < pm.height(); ++y) {
+        sk_memset64(pm.writable_addr64(0, y), half4, pm.width());
+    }
+    return true;
+}
+
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkSurface.h"
 #include "SkXfermode.h"
 
 bool SkPixmap::scalePixels(const SkPixmap& dst, SkFilterQuality quality) const {
     // Can't do anthing with empty src or dst
     if (this->width() <= 0 || this->height() <= 0 || dst.width() <= 0 || dst.height() <= 0) {
         return false;
     }
@@ skipping 58 matching lines @@
     if (!fStorage) {
         return nullptr;
     }
 
     const SkData* data = SkData::NewFromMalloc(fStorage, this->getSafeSize());
     fStorage = nullptr;
     this->INHERITED::reset();
 
     return data;
 }