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, 6 insertions, 4 deletions

diff --git a/src/core/SkPictureRecord.cpp b/src/core/SkPictureRecord.cpp
index 87c8c4d2fb..922fb6a425 100644
--- a/src/core/SkPictureRecord.cpp
+++ b/src/core/SkPictureRecord.cpp
@@ -682,14 +682,16 @@ void SkPictureRecord::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matri
     this->validate(initialOffset, size);
 }
 
-void SkPictureRecord::onDrawVerticesObject(const SkVertices* vertices, SkBlendMode mode,
-                                           const SkPaint& paint) {
-    // op + paint index + vertices index + mode
-    size_t size = 4 * kUInt32Size;
+void SkPictureRecord::onDrawVerticesObject(const SkVertices* vertices, const SkMatrix* bones,
+                                           int boneCount, SkBlendMode mode, const SkPaint& paint) {
+    // op + paint index + vertices index + number of bones + bone matrices + mode
+    size_t size = 5 * kUInt32Size + boneCount * sizeof(SkMatrix);
     size_t initialOffset = this->addDraw(DRAW_VERTICES_OBJECT, &size);
 
     this->addPaint(paint);
     this->addVertices(vertices);
+    this->addInt(boneCount);
+    fWriter.write(bones, boneCount * sizeof(SkMatrix));
     this->addInt(static_cast<uint32_t>(mode));
 
     this->validate(initialOffset, size);