97 lines
2.4 KiB
C++
97 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) Meta Platforms, Inc. and affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#include <cstdlib>
|
|
#include <limits>
|
|
|
|
#include <react/renderer/components/image/ImageShadowNode.h>
|
|
#include <react/renderer/core/LayoutContext.h>
|
|
#include "ImageState.h"
|
|
|
|
namespace facebook::react {
|
|
|
|
const char ImageComponentName[] = "Image";
|
|
|
|
void ImageShadowNode::setImageManager(const SharedImageManager &imageManager) {
|
|
ensureUnsealed();
|
|
imageManager_ = imageManager;
|
|
}
|
|
|
|
void ImageShadowNode::updateStateIfNeeded() {
|
|
ensureUnsealed();
|
|
|
|
auto imageSource = getImageSource();
|
|
auto const ¤tState = getStateData();
|
|
bool hasSameRadius =
|
|
getConcreteProps().blurRadius == currentState.getBlurRadius();
|
|
bool hasSameImageSource = currentState.getImageSource() == imageSource;
|
|
|
|
if (hasSameImageSource && hasSameRadius) {
|
|
return;
|
|
}
|
|
|
|
auto state = ImageState{
|
|
imageSource,
|
|
imageManager_->requestImage(imageSource, getSurfaceId()),
|
|
getConcreteProps().blurRadius};
|
|
setStateData(std::move(state));
|
|
}
|
|
|
|
ImageSource ImageShadowNode::getImageSource() const {
|
|
auto sources = getConcreteProps().sources;
|
|
|
|
if (sources.empty()) {
|
|
return {
|
|
/* .type = */ ImageSource::Type::Invalid,
|
|
};
|
|
}
|
|
|
|
auto layoutMetrics = getLayoutMetrics();
|
|
auto size = layoutMetrics.getContentFrame().size;
|
|
auto scale = layoutMetrics.pointScaleFactor;
|
|
|
|
if (sources.size() == 1) {
|
|
auto source = sources[0];
|
|
source.size = size;
|
|
source.scale = scale;
|
|
return source;
|
|
}
|
|
|
|
auto targetImageArea = size.width * size.height * scale * scale;
|
|
auto bestFit = std::numeric_limits<Float>::infinity();
|
|
|
|
auto bestSource = ImageSource{};
|
|
|
|
for (const auto &source : sources) {
|
|
auto sourceSize = source.size;
|
|
auto sourceScale = source.scale == 0 ? scale : source.scale;
|
|
auto sourceArea =
|
|
sourceSize.width * sourceSize.height * sourceScale * sourceScale;
|
|
|
|
auto fit = std::abs(1 - (sourceArea / targetImageArea));
|
|
|
|
if (fit < bestFit) {
|
|
bestFit = fit;
|
|
bestSource = source;
|
|
}
|
|
}
|
|
|
|
bestSource.size = size;
|
|
bestSource.scale = scale;
|
|
|
|
return bestSource;
|
|
}
|
|
|
|
#pragma mark - LayoutableShadowNode
|
|
|
|
void ImageShadowNode::layout(LayoutContext layoutContext) {
|
|
updateStateIfNeeded();
|
|
ConcreteViewShadowNode::layout(layoutContext);
|
|
}
|
|
|
|
} // namespace facebook::react
|