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// 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/SkBlurMaskFilter.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()));
}
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
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