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// 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"
#include "ui/gfx/transform_util.h"
#include "ui/gfx/vector3d_f.h"
namespace cc {
TransformOperations::TransformOperations()
: decomposed_transform_dirty_(true) {
}
TransformOperations::TransformOperations(const TransformOperations& other) {
operations_ = other.operations_;
decomposed_transform_dirty_ = other.decomposed_transform_dirty_;
if (!decomposed_transform_dirty_) {
decomposed_transform_.reset(
new gfx::DecomposedTransform(*other.decomposed_transform_.get()));
}
}
TransformOperations::~TransformOperations() {
}
gfx::Transform TransformOperations::Apply() const {
gfx::Transform to_return;
for (size_t i = 0; i < operations_.size(); ++i)
to_return.PreconcatTransform(operations_[i].matrix);
return to_return;
}
gfx::Transform TransformOperations::Blend(
const TransformOperations& from, double progress) const {
gfx::Transform 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 {
gfx::Transform 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);
decomposed_transform_dirty_ = true;
}
void TransformOperations::AppendRotate(double x, double y, double z,
double degrees) {
TransformOperation to_add;
to_add.matrix.RotateAbout(gfx::Vector3dF(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);
decomposed_transform_dirty_ = true;
}
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);
decomposed_transform_dirty_ = true;
}
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);
decomposed_transform_dirty_ = true;
}
void TransformOperations::AppendPerspective(double depth) {
TransformOperation to_add;
to_add.matrix.ApplyPerspectiveDepth(depth);
to_add.type = TransformOperation::TransformOperationPerspective;
to_add.perspective_depth = depth;
operations_.push_back(to_add);
decomposed_transform_dirty_ = true;
}
void TransformOperations::AppendMatrix(const gfx::Transform& matrix) {
TransformOperation to_add;
to_add.matrix = matrix;
to_add.type = TransformOperation::TransformOperationMatrix;
operations_.push_back(to_add);
decomposed_transform_dirty_ = true;
}
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,
gfx::Transform* 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) {
gfx::Transform blended;
if (!TransformOperation::BlendTransformOperations(
from_identity ? 0 : &from.operations_[i],
to_identity ? 0 : &operations_[i],
progress,
blended))
return false;
result->PreconcatTransform(blended);
}
return true;
}
if (progress <= 0.0) {
*result = from.Apply();
return true;
}
if (progress >= 1.0) {
*result = Apply();
return true;
}
if (!ComputeDecomposedTransform() || !from.ComputeDecomposedTransform())
return false;
gfx::DecomposedTransform to_return;
if (!gfx::BlendDecomposedTransforms(&to_return,
*decomposed_transform_.get(),
*from.decomposed_transform_.get(),
progress))
return false;
*result = ComposeTransform(to_return);
return true;
}
bool TransformOperations::ComputeDecomposedTransform() const {
if (decomposed_transform_dirty_) {
if (!decomposed_transform_)
decomposed_transform_.reset(new gfx::DecomposedTransform());
gfx::Transform transform = Apply();
if (!gfx::DecomposeTransform(decomposed_transform_.get(), transform))
return false;
decomposed_transform_dirty_ = false;
}
return true;
}
} // namespace cc
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