Add skia to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 36 insertions, 0 deletions

diff --git a/skia/effects/SkPixelXorXfermode.cpp b/skia/effects/SkPixelXorXfermode.cpp
new file mode 100644
index 0000000..a5599e2
--- /dev/null
+++ b/skia/effects/SkPixelXorXfermode.cpp
@@ -0,0 +1,36 @@
+#include "SkPixelXorXfermode.h"
+#include "SkColorPriv.h"
+
+// we always return an opaque color, 'cause I don't know what to do with
+// the alpha-component and still return a valid premultiplied color.
+SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst)
+{
+    SkPMColor res = src ^ dst ^ fOpColor;
+    res |= (SK_A32_MASK << SK_A32_SHIFT);   // force it to be opaque
+    return res;
+}
+
+void SkPixelXorXfermode::flatten(SkFlattenableWriteBuffer& wb)
+{
+    this->INHERITED::flatten(wb);
+    wb.write32(fOpColor);
+}
+
+SkPixelXorXfermode::SkPixelXorXfermode(SkFlattenableReadBuffer& rb)
+    : SkXfermode(rb)
+{
+    fOpColor = rb.readU32();
+}
+
+SkFlattenable::Factory SkPixelXorXfermode::getFactory()
+{
+    return Create;
+}
+
+SkFlattenable* SkPixelXorXfermode::Create(SkFlattenableReadBuffer& rb)
+{
+    return SkNEW_ARGS(SkPixelXorXfermode, (rb));
+}
+
+
+