| // 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 "third_party/skia/include/core/SkBitmap.h" |
| #include "third_party/skia/include/core/SkColorFilter.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/image/image_skia_rep.h" |
| #include "ui/gfx/shadow_value.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) { |
| return Rect(rect.x(), rect.y(), rect.width(), rect.height()); |
| } |
| |
| 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))); |
| } |
| |
| sk_sp<SkShader> CreateImageRepShader(const gfx::ImageSkiaRep& image_rep, |
| SkShader::TileMode tile_mode, |
| const SkMatrix& local_matrix) { |
| return CreateImageRepShaderForScale(image_rep, tile_mode, local_matrix, |
| image_rep.scale()); |
| } |
| |
| sk_sp<SkShader> CreateImageRepShaderForScale( |
| const gfx::ImageSkiaRep& image_rep, |
| SkShader::TileMode tile_mode, |
| const SkMatrix& local_matrix, |
| SkScalar scale) { |
| // Unscale matrix by |scale| such that the bitmap is drawn at the |
| // correct density. |
| // Convert skew and translation to pixel coordinates. |
| // Thus, for |bitmap_scale| = 2: |
| // x scale = 2, x translation = 1 DIP, |
| // should be converted to |
| // x scale = 1, x translation = 2 pixels. |
| SkMatrix shader_scale = local_matrix; |
| shader_scale.preScale(scale, scale); |
| shader_scale.setScaleX(local_matrix.getScaleX() / scale); |
| shader_scale.setScaleY(local_matrix.getScaleY() / scale); |
| |
| return SkShader::MakeBitmapShader( |
| image_rep.sk_bitmap(), tile_mode, tile_mode, &shader_scale); |
| } |
| |
| sk_sp<SkShader> CreateGradientShader(int start_point, |
| int end_point, |
| SkColor start_color, |
| SkColor end_color) { |
| SkColor grad_colors[2] = { start_color, end_color}; |
| SkPoint grad_points[2]; |
| grad_points[0].iset(0, start_point); |
| grad_points[1].iset(0, end_point); |
| |
| return SkGradientShader::MakeLinear( |
| grad_points, grad_colors, NULL, 2, SkShader::kClamp_TileMode); |
| } |
| |
| // TODO(estade): remove. Only exists to support legacy CreateShadowDrawLooper. |
| static SkScalar DeprecatedRadiusToSigma(double radius) { |
| // This captures historically what skia did under the hood. Now skia accepts |
| // sigma, not radius, so we perform the conversion. |
| return radius > 0 ? SkDoubleToScalar(0.57735f * radius + 0.5) : 0; |
| } |
| |
| // This is copied from |
| // third_party/WebKit/Source/platform/graphics/skia/SkiaUtils.h |
| static SkScalar RadiusToSigma(double radius) { |
| return radius > 0 ? SkDoubleToScalar(0.288675f * radius + 0.5f) : 0; |
| } |
| |
| sk_sp<SkDrawLooper> CreateShadowDrawLooper( |
| const std::vector<ShadowValue>& shadows) { |
| if (shadows.empty()) |
| return nullptr; |
| |
| SkLayerDrawLooper::Builder looper_builder; |
| |
| looper_builder.addLayer(); // top layer of the original. |
| |
| SkLayerDrawLooper::LayerInfo layer_info; |
| layer_info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; |
| layer_info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; |
| layer_info.fColorMode = SkXfermode::kSrc_Mode; |
| |
| for (size_t i = 0; i < shadows.size(); ++i) { |
| const ShadowValue& shadow = shadows[i]; |
| |
| layer_info.fOffset.set(SkIntToScalar(shadow.x()), |
| SkIntToScalar(shadow.y())); |
| |
| SkPaint* paint = looper_builder.addLayer(layer_info); |
| // SkBlurMaskFilter's blur radius defines the range to extend the blur from |
| // original mask, which is half of blur amount as defined in ShadowValue. |
| // Note that because this function uses DeprecatedRadiusToSigma, it actually |
| // creates a draw looper with roughly twice the desired blur. |
| paint->setMaskFilter(SkBlurMaskFilter::Make( |
| kNormal_SkBlurStyle, DeprecatedRadiusToSigma(shadow.blur() / 2), |
| SkBlurMaskFilter::kHighQuality_BlurFlag)); |
| paint->setColorFilter( |
| SkColorFilter::MakeModeFilter(shadow.color(), |
| SkXfermode::kSrcIn_Mode)); |
| } |
| |
| return looper_builder.detach(); |
| } |
| |
| sk_sp<SkDrawLooper> CreateShadowDrawLooperCorrectBlur( |
| const std::vector<ShadowValue>& shadows) { |
| if (shadows.empty()) |
| return nullptr; |
| |
| SkLayerDrawLooper::Builder looper_builder; |
| |
| looper_builder.addLayer(); // top layer of the original. |
| |
| SkLayerDrawLooper::LayerInfo layer_info; |
| layer_info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit; |
| layer_info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit; |
| layer_info.fColorMode = SkXfermode::kSrc_Mode; |
| |
| for (size_t i = 0; i < shadows.size(); ++i) { |
| const ShadowValue& shadow = shadows[i]; |
| |
| layer_info.fOffset.set(SkIntToScalar(shadow.x()), |
| SkIntToScalar(shadow.y())); |
| |
| SkPaint* paint = looper_builder.addLayer(layer_info); |
| // SkBlurMaskFilter's blur radius defines the range to extend the blur from |
| // original mask, which is half of blur amount as defined in ShadowValue. |
| paint->setMaskFilter(SkBlurMaskFilter::Make( |
| kNormal_SkBlurStyle, RadiusToSigma(shadow.blur() / 2), |
| SkBlurMaskFilter::kHighQuality_BlurFlag)); |
| paint->setColorFilter( |
| SkColorFilter::MakeModeFilter(shadow.color(), |
| SkXfermode::kSrcIn_Mode)); |
| } |
| |
| return looper_builder.detach(); |
| } |
| |
| bool BitmapsAreEqual(const SkBitmap& bitmap1, const SkBitmap& bitmap2) { |
| void* addr1 = NULL; |
| void* addr2 = NULL; |
| size_t size1 = 0; |
| size_t size2 = 0; |
| |
| bitmap1.lockPixels(); |
| addr1 = bitmap1.getAddr32(0, 0); |
| size1 = bitmap1.getSize(); |
| bitmap1.unlockPixels(); |
| |
| bitmap2.lockPixels(); |
| addr2 = bitmap2.getAddr32(0, 0); |
| size2 = bitmap2.getSize(); |
| bitmap2.unlockPixels(); |
| |
| return (size1 == size2) && (0 == memcmp(addr1, addr2, bitmap1.getSize())); |
| } |
| |
| 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 |