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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_GEOMETRY_TRANSFORM_OPERATION_H_
#define UI_GFX_GEOMETRY_TRANSFORM_OPERATION_H_
// TODO(crbug.com/40237414): Remove dependency to Skia.
#include "base/component_export.h"
#include "third_party/skia/include/core/SkScalar.h"
#include "ui/gfx/geometry/transform.h"
namespace gfx {
class BoxF;
struct COMPONENT_EXPORT(GEOMETRY_SKIA) TransformOperation {
enum Type {
TRANSFORM_OPERATION_TRANSLATE,
TRANSFORM_OPERATION_ROTATE,
TRANSFORM_OPERATION_SCALE,
TRANSFORM_OPERATION_SKEWX,
TRANSFORM_OPERATION_SKEWY,
TRANSFORM_OPERATION_SKEW,
TRANSFORM_OPERATION_PERSPECTIVE,
TRANSFORM_OPERATION_MATRIX,
TRANSFORM_OPERATION_IDENTITY
};
Type type = TRANSFORM_OPERATION_IDENTITY;
gfx::Transform matrix;
union {
// We store the transform matrix component for perspective, which is
// -1/depth. This allows representing infinite distance correctly.
SkScalar perspective_m43;
struct {
SkScalar x, y;
} skew;
struct {
SkScalar x, y, z;
} scale;
struct {
SkScalar x, y, z;
} translate;
struct {
struct {
SkScalar x, y, z;
} axis;
SkScalar angle;
} rotate;
};
bool IsIdentity() const;
// Sets |matrix| based on type and the union values.
void Bake();
bool ApproximatelyEqual(const TransformOperation& other,
SkScalar tolerance) const;
static bool BlendTransformOperations(const TransformOperation* from,
const TransformOperation* to,
SkScalar progress,
TransformOperation* result);
static bool BlendedBoundsForBox(const gfx::BoxF& box,
const TransformOperation* from,
const TransformOperation* to,
SkScalar min_progress,
SkScalar max_progress,
gfx::BoxF* bounds);
};
} // namespace gfx
#endif // UI_GFX_GEOMETRY_TRANSFORM_OPERATION_H_
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