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80 lines
2.8 KiB
C++
80 lines
2.8 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 "flutter/lib/ui/painting/gradient.h"
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#include "lib/tonic/converter/dart_converter.h"
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#include "lib/tonic/dart_args.h"
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#include "lib/tonic/dart_binding_macros.h"
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#include "lib/tonic/dart_library_natives.h"
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namespace blink {
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typedef CanvasGradient
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Gradient; // Because the C++ name doesn't match the Dart name.
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static void Gradient_constructor(Dart_NativeArguments args) {
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DartCallConstructor(&CanvasGradient::Create, args);
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}
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IMPLEMENT_WRAPPERTYPEINFO(ui, Gradient);
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#define FOR_EACH_BINDING(V) \
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V(Gradient, initLinear) \
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V(Gradient, initRadial)
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FOR_EACH_BINDING(DART_NATIVE_CALLBACK)
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void CanvasGradient::RegisterNatives(tonic::DartLibraryNatives* natives) {
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natives->Register({{"Gradient_constructor", Gradient_constructor, 1, true},
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FOR_EACH_BINDING(DART_REGISTER_NATIVE)});
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}
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fxl::RefPtr<CanvasGradient> CanvasGradient::Create() {
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return fxl::MakeRefCounted<CanvasGradient>();
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}
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void CanvasGradient::initLinear(const tonic::Float32List& end_points,
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const tonic::Int32List& colors,
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const tonic::Float32List& color_stops,
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SkShader::TileMode tile_mode) {
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FXL_DCHECK(end_points.num_elements() == 4);
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FXL_DCHECK(colors.num_elements() == color_stops.num_elements() ||
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color_stops.data() == nullptr);
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static_assert(sizeof(SkPoint) == sizeof(float) * 2,
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"SkPoint doesn't use floats.");
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static_assert(sizeof(SkColor) == sizeof(int32_t),
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"SkColor doesn't use int32_t.");
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set_shader(SkGradientShader::MakeLinear(
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reinterpret_cast<const SkPoint*>(end_points.data()),
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reinterpret_cast<const SkColor*>(colors.data()), color_stops.data(),
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colors.num_elements(), tile_mode));
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}
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void CanvasGradient::initRadial(double center_x,
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double center_y,
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double radius,
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const tonic::Int32List& colors,
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const tonic::Float32List& color_stops,
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SkShader::TileMode tile_mode) {
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FXL_DCHECK(colors.num_elements() == color_stops.num_elements() ||
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color_stops.data() == nullptr);
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static_assert(sizeof(SkColor) == sizeof(int32_t),
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"SkColor doesn't use int32_t.");
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set_shader(SkGradientShader::MakeRadial(
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SkPoint::Make(center_x, center_y), radius,
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reinterpret_cast<const SkColor*>(colors.data()), color_stops.data(),
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colors.num_elements(), tile_mode));
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}
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CanvasGradient::CanvasGradient() : Shader(nullptr) {}
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CanvasGradient::~CanvasGradient() {}
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} // namespace blink
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