| // Copyright (c) 2012 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 "ui/gfx/skia_util.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "base/numerics/safe_conversions.h" |
| #include "base/numerics/safe_math.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "third_party/skia/include/core/SkColorPriv.h" |
| #include "third_party/skia/include/core/SkUnPreMultiply.h" |
| #include "third_party/skia/include/effects/SkGradientShader.h" |
| #include "third_party/skia/include/effects/SkLayerDrawLooper.h" |
| #include "ui/gfx/geometry/quad_f.h" |
| #include "ui/gfx/geometry/rect.h" |
| #include "ui/gfx/geometry/rect_f.h" |
| #include "ui/gfx/transform.h" |
| |
| namespace gfx { |
| |
| SkPoint PointToSkPoint(const Point& point) { |
| return SkPoint::Make(SkIntToScalar(point.x()), SkIntToScalar(point.y())); |
| } |
| |
| SkIPoint PointToSkIPoint(const Point& point) { |
| return SkIPoint::Make(point.x(), point.y()); |
| } |
| |
| SkPoint PointFToSkPoint(const PointF& point) { |
| return SkPoint::Make(SkFloatToScalar(point.x()), SkFloatToScalar(point.y())); |
| } |
| |
| SkRect RectToSkRect(const Rect& rect) { |
| return SkRect::MakeXYWH( |
| SkIntToScalar(rect.x()), SkIntToScalar(rect.y()), |
| SkIntToScalar(rect.width()), SkIntToScalar(rect.height())); |
| } |
| |
| SkIRect RectToSkIRect(const Rect& rect) { |
| return SkIRect::MakeXYWH(rect.x(), rect.y(), rect.width(), rect.height()); |
| } |
| |
| Rect SkIRectToRect(const SkIRect& rect) { |
| Rect result; |
| result.SetByBounds(rect.left(), rect.top(), rect.right(), rect.bottom()); |
| return result; |
| } |
| |
| SkRect RectFToSkRect(const RectF& rect) { |
| return SkRect::MakeXYWH(SkFloatToScalar(rect.x()), |
| SkFloatToScalar(rect.y()), |
| SkFloatToScalar(rect.width()), |
| SkFloatToScalar(rect.height())); |
| } |
| |
| RectF SkRectToRectF(const SkRect& rect) { |
| return RectF(SkScalarToFloat(rect.x()), |
| SkScalarToFloat(rect.y()), |
| SkScalarToFloat(rect.width()), |
| SkScalarToFloat(rect.height())); |
| } |
| |
| SkSize SizeFToSkSize(const SizeF& size) { |
| return SkSize::Make(SkFloatToScalar(size.width()), |
| SkFloatToScalar(size.height())); |
| } |
| |
| SkISize SizeToSkISize(const Size& size) { |
| return SkISize::Make(size.width(), size.height()); |
| } |
| |
| SizeF SkSizeToSizeF(const SkSize& size) { |
| return SizeF(SkScalarToFloat(size.width()), SkScalarToFloat(size.height())); |
| } |
| |
| Size SkISizeToSize(const SkISize& size) { |
| return Size(size.width(), size.height()); |
| } |
| |
| void TransformToFlattenedSkMatrix(const gfx::Transform& transform, |
| SkMatrix* flattened) { |
| // Convert from 4x4 to 3x3 by dropping the third row and column. |
| flattened->set(0, SkMScalarToScalar(transform.matrix().get(0, 0))); |
| flattened->set(1, SkMScalarToScalar(transform.matrix().get(0, 1))); |
| flattened->set(2, SkMScalarToScalar(transform.matrix().get(0, 3))); |
| flattened->set(3, SkMScalarToScalar(transform.matrix().get(1, 0))); |
| flattened->set(4, SkMScalarToScalar(transform.matrix().get(1, 1))); |
| flattened->set(5, SkMScalarToScalar(transform.matrix().get(1, 3))); |
| flattened->set(6, SkMScalarToScalar(transform.matrix().get(3, 0))); |
| flattened->set(7, SkMScalarToScalar(transform.matrix().get(3, 1))); |
| flattened->set(8, SkMScalarToScalar(transform.matrix().get(3, 3))); |
| } |
| |
| bool BitmapsAreEqual(const SkBitmap& bitmap1, const SkBitmap& bitmap2) { |
| void* addr1 = NULL; |
| void* addr2 = NULL; |
| size_t size1 = 0; |
| size_t size2 = 0; |
| |
| addr1 = bitmap1.getAddr32(0, 0); |
| size1 = bitmap1.computeByteSize(); |
| |
| addr2 = bitmap2.getAddr32(0, 0); |
| size2 = bitmap2.computeByteSize(); |
| |
| return (size1 == size2) && (0 == memcmp(addr1, addr2, size1)); |
| } |
| |
| void ConvertSkiaToRGBA(const unsigned char* skia, |
| int pixel_width, |
| unsigned char* rgba) { |
| int total_length = pixel_width * 4; |
| for (int i = 0; i < total_length; i += 4) { |
| const uint32_t pixel_in = *reinterpret_cast<const uint32_t*>(&skia[i]); |
| |
| // Pack the components here. |
| SkAlpha alpha = SkGetPackedA32(pixel_in); |
| if (alpha != 0 && alpha != 255) { |
| SkColor unmultiplied = SkUnPreMultiply::PMColorToColor(pixel_in); |
| rgba[i + 0] = SkColorGetR(unmultiplied); |
| rgba[i + 1] = SkColorGetG(unmultiplied); |
| rgba[i + 2] = SkColorGetB(unmultiplied); |
| rgba[i + 3] = alpha; |
| } else { |
| rgba[i + 0] = SkGetPackedR32(pixel_in); |
| rgba[i + 1] = SkGetPackedG32(pixel_in); |
| rgba[i + 2] = SkGetPackedB32(pixel_in); |
| rgba[i + 3] = alpha; |
| } |
| } |
| } |
| |
| void QuadFToSkPoints(const gfx::QuadF& quad, SkPoint points[4]) { |
| points[0] = PointFToSkPoint(quad.p1()); |
| points[1] = PointFToSkPoint(quad.p2()); |
| points[2] = PointFToSkPoint(quad.p3()); |
| points[3] = PointFToSkPoint(quad.p4()); |
| } |
| |
| // We treat HarfBuzz ints as 16.16 fixed-point. |
| static const int kHbUnit1 = 1 << 16; |
| |
| int SkiaScalarToHarfBuzzUnits(SkScalar value) { |
| return base::saturated_cast<int>(value * kHbUnit1); |
| } |
| |
| SkScalar HarfBuzzUnitsToSkiaScalar(int value) { |
| static const SkScalar kSkToHbRatio = SK_Scalar1 / kHbUnit1; |
| return kSkToHbRatio * value; |
| } |
| |
| float HarfBuzzUnitsToFloat(int value) { |
| static const float kFloatToHbRatio = 1.0f / kHbUnit1; |
| return kFloatToHbRatio * value; |
| } |
| |
| } // namespace gfx |