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96df6c373c
We still use SkPicture as our rasterization backend, but now we're uploading our layer tree to C++. A future patch will push the layer tree deeper into the system and we'll eventually switch backends.
40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "sky/engine/core/painting/Matrix.h"
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namespace blink {
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// Mappings from SkMatrix-index to input-index.
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static const int kSkMatrixIndexToMatrix4Index[] = {
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0, 4, 12,
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1, 5, 13,
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3, 7, 15,
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};
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SkMatrix toSkMatrix(const Float32List& matrix4, ExceptionState& es)
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{
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ASSERT(matrix4.data());
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SkMatrix sk_matrix;
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if (matrix4.num_elements() != 16) {
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es.ThrowTypeError("Incorrect number of elements in matrix.");
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return sk_matrix;
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}
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for (intptr_t i = 0; i < 9; ++i)
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sk_matrix[i] = matrix4[kSkMatrixIndexToMatrix4Index[i]];
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return sk_matrix;
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}
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Float32List toMatrix4(const SkMatrix& sk_matrix)
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{
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Float32List matrix4(Dart_NewTypedData(Dart_TypedData_kFloat32, 16));
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for (intptr_t i = 0; i < 9; ++i)
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matrix4[kSkMatrixIndexToMatrix4Index[i]] = sk_matrix[i];
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matrix4[10] = 1.0; // Identity along the z axis.
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return matrix4;
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}
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} // namespace blink
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