Define cc::TransformOperations and webkit::WebTransformOperationsImpl

cc/transform_operations.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/transform_operations.h"
+
+using WebKit::WebTransformationMatrix;
+
+namespace cc {
+
+TransformOperations::TransformOperations() {
+}
+
+TransformOperations::TransformOperations(const TransformOperations& other) {
+  operations_ = other.operations_;
+}
+
+TransformOperations::~TransformOperations() {
+}
+
+WebTransformationMatrix TransformOperations::Apply() const {
+  WebTransformationMatrix to_return;
+  for (size_t i = 0; i < operations_.size(); ++i)
+    to_return.multiply(operations_[i].matrix);
+  return to_return;
+}
+
+WebTransformationMatrix TransformOperations::Blend(
+    const TransformOperations& from, double progress) const {
+  WebTransformationMatrix to_return;
+  BlendInternal(from, progress, to_return);
+  return to_return;
+}
+
+bool TransformOperations::MatchesTypes(const TransformOperations& other) const {
+  if (IsIdentity() || other.IsIdentity())
+    return true;
+
+  if (operations_.size() != other.operations_.size())
+    return false;
+
+  for (size_t i = 0; i < operations_.size(); ++i) {
+    if (operations_[i].type != other.operations_[i].type
+      && !operations_[i].IsIdentity()
+      && !other.operations_[i].IsIdentity())
+      return false;
+  }
+
+  return true;
+}
+
+bool TransformOperations::CanBlendWith(
+    const TransformOperations& other) const {
+  WebTransformationMatrix dummy;
+  return BlendInternal(other, 0.5, dummy);
+}
+
+void TransformOperations::AppendTranslate(double x, double y, double z) {
+  TransformOperation to_add;
+  to_add.matrix.translate3d(x, y, z);
+  to_add.type = TransformOperation::TransformOperationTranslate;
+  to_add.translate.x = x;
+  to_add.translate.y = y;
+  to_add.translate.z = z;
+  operations_.push_back(to_add);
+}
+
+void TransformOperations::AppendRotate(double x, double y, double z,
+                                       double degrees) {
+  TransformOperation to_add;
+  to_add.matrix.rotate3d(x, y, z, degrees);
+  to_add.type = TransformOperation::TransformOperationRotate;
+  to_add.rotate.axis.x = x;
+  to_add.rotate.axis.y = y;
+  to_add.rotate.axis.z = z;
+  to_add.rotate.angle = degrees;
+  operations_.push_back(to_add);
+}
+
+void TransformOperations::AppendScale(double x, double y, double z) {
+  TransformOperation to_add;
+  to_add.matrix.scale3d(x, y, z);
+  to_add.type = TransformOperation::TransformOperationScale;
+  to_add.scale.x = x;
+  to_add.scale.y = y;
+  to_add.scale.z = z;
+  operations_.push_back(to_add);
+}
+
+void TransformOperations::AppendSkew(double x, double y) {
+  TransformOperation to_add;
+  to_add.matrix.skewX(x);
+  to_add.matrix.skewY(y);
+  to_add.type = TransformOperation::TransformOperationSkew;
+  to_add.skew.x = x;
+  to_add.skew.y = y;
+  operations_.push_back(to_add);
+}
+
+void TransformOperations::AppendPerspective(double depth) {
+  TransformOperation to_add;
+  to_add.matrix.applyPerspective(depth);
+  to_add.type = TransformOperation::TransformOperationPerspective;
+  to_add.perspective_depth = depth;
+  operations_.push_back(to_add);
+}
+
+void TransformOperations::AppendMatrix(const WebTransformationMatrix& matrix) {
+  TransformOperation to_add;
+  to_add.matrix = matrix;
+  to_add.type = TransformOperation::TransformOperationMatrix;
+  operations_.push_back(to_add);
+}
+
+void TransformOperations::AppendIdentity() {
+  operations_.push_back(TransformOperation());
+}
+
+bool TransformOperations::IsIdentity() const {
+  for (size_t i = 0; i < operations_.size(); ++i) {
+    if (!operations_[i].IsIdentity())
+      return false;
+  }
+  return true;
+}
+
+bool TransformOperations::BlendInternal(const TransformOperations& from,
+                                        double progress,
+                                        WebTransformationMatrix& result) const {
+  bool from_identity = from.IsIdentity();
+  bool to_identity = IsIdentity();
+  if (from_identity && to_identity)
+    return true;
+
+  if (MatchesTypes(from)) {
+    size_t num_operations =
+        std::max(from_identity ? 0 : from.operations_.size(),
+                 to_identity ? 0 : operations_.size());
+    for (size_t i = 0; i < num_operations; ++i) {
+      WebTransformationMatrix blended;
+      if (!TransformOperation::BlendTransformOperations(
+          from_identity ? 0 : &from.operations_[i],
+          to_identity ? 0 : &operations_[i],
+          progress,
+          blended))
+          return false;
+      result.multiply(blended);
+    }
+    return true;
+  }
+
+  result = Apply();
+  WebTransformationMatrix from_transform = from.Apply();
+  return result.blend(from_transform, progress);
+}
+
+}  // namespace cc