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// Copyright 2013 The Flutter 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 "flutter/lib/ui/painting/vertices.h"
#include <algorithm>
#include "flutter/lib/ui/ui_dart_state.h"
#include "third_party/tonic/dart_binding_macros.h"
#include "third_party/tonic/dart_library_natives.h"
namespace flutter {
namespace {
void DecodePoints(const tonic::Float32List& coords, SkPoint* points) {
for (int i = 0; i < coords.num_elements(); i += 2) {
points[i / 2] = SkPoint::Make(coords[i], coords[i + 1]);
}
}
template <typename T>
void DecodeInts(const tonic::Int32List& ints, T* out) {
for (int i = 0; i < ints.num_elements(); i++) {
out[i] = ints[i];
}
}
} // namespace
IMPLEMENT_WRAPPERTYPEINFO(ui, Vertices);
#define FOR_EACH_BINDING(V) V(Vertices, init)
FOR_EACH_BINDING(DART_NATIVE_CALLBACK)
Vertices::Vertices() {}
Vertices::~Vertices() {}
void Vertices::RegisterNatives(tonic::DartLibraryNatives* natives) {
natives->Register({FOR_EACH_BINDING(DART_REGISTER_NATIVE)});
}
bool Vertices::init(Dart_Handle vertices_handle,
SkVertices::VertexMode vertex_mode,
const tonic::Float32List& positions,
const tonic::Float32List& texture_coordinates,
const tonic::Int32List& colors,
const tonic::Uint16List& indices) {
UIDartState::ThrowIfUIOperationsProhibited();
uint32_t builderFlags = 0;
if (texture_coordinates.data()) {
builderFlags |= SkVertices::kHasTexCoords_BuilderFlag;
}
if (colors.data()) {
builderFlags |= SkVertices::kHasColors_BuilderFlag;
}
SkVertices::Builder builder(vertex_mode, positions.num_elements() / 2,
indices.num_elements(), builderFlags);
if (!builder.isValid()) {
return false;
}
// positions are required for SkVertices::Builder
FML_DCHECK(positions.data());
if (positions.data()) {
DecodePoints(positions, builder.positions());
}
if (texture_coordinates.data()) {
// SkVertices::Builder assumes equal numbers of elements
FML_DCHECK(positions.num_elements() == texture_coordinates.num_elements());
DecodePoints(texture_coordinates, builder.texCoords());
}
if (colors.data()) {
// SkVertices::Builder assumes equal numbers of elements
FML_DCHECK(positions.num_elements() / 2 == colors.num_elements());
DecodeInts<SkColor>(colors, builder.colors());
}
if (indices.data()) {
std::copy(indices.data(), indices.data() + indices.num_elements(),
builder.indices());
}
auto vertices = fml::MakeRefCounted<Vertices>();
vertices->vertices_ = builder.detach();
vertices->AssociateWithDartWrapper(vertices_handle);
return true;
}
size_t Vertices::GetAllocationSize() const {
return sizeof(Vertices) + vertices_->approximateSize();
}
} // namespace flutter