skeletal animation support added to API and software backend

SkCanvas::drawVertices now supports overloads that take an array of bone deformation matrices.
SkVertices::MakeCopy and SkVertices::Builder now support two additional optional attributes, boneIndices and boneWeights.

Bug: skia:
Change-Id: I30a3b11691e7cdb13924907cc1401ff86d127aea
Reviewed-on: https://skia-review.googlesource.com/137221
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Ruiqi Mao <ruiqimao@google.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/pipe/SkPipeReader.cpp b/src/pipe/SkPipeReader.cpp
index ada4a21342..312e3da4e8 100644
--- a/src/pipe/SkPipeReader.cpp
+++ b/src/pipe/SkPipeReader.cpp
@@ -562,9 +562,14 @@ static void drawImageLattice_handler(SkPipeReader& reader, uint32_t packedVerb,
 static void drawVertices_handler(SkPipeReader& reader, uint32_t packedVerb, SkCanvas* canvas) {
     SkASSERT(SkPipeVerb::kDrawVertices == unpack_verb(packedVerb));
     SkBlendMode bmode = (SkBlendMode)unpack_verb_extra(packedVerb);
+    sk_sp<SkVertices> vertices = nullptr;
     if (sk_sp<SkData> data = reader.readByteArrayAsData()) {
-        canvas->drawVertices(SkVertices::Decode(data->data(), data->size()), bmode,
-                             read_paint(reader));
+        vertices = SkVertices::Decode(data->data(), data->size());
+    }
+    int boneCount = reader.read32();
+    const SkMatrix* bones = boneCount ? reader.skipT<SkMatrix>(boneCount) : nullptr;
+    if (vertices) {
+        canvas->drawVertices(vertices, bones, boneCount, bmode, read_paint(reader));
     }
 }