84 lines
2.6 KiB
Plaintext
84 lines
2.6 KiB
Plaintext
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//
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// DrawableFrameHostObject.mm
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// VisionCamera
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//
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// Created by Marc Rousavy on 20.07.23.
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// Copyright © 2023 mrousavy. All rights reserved.
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//
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#import "DrawableFrameHostObject.h"
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#import "SkCanvas.h"
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#import "SkImageHelpers.h"
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std::vector<jsi::PropNameID> DrawableFrameHostObject::getPropertyNames(jsi::Runtime& rt) {
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auto result = FrameHostObject::getPropertyNames(rt);
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// Skia - Render Frame
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result.push_back(jsi::PropNameID::forUtf8(rt, std::string("render")));
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if (_canvas != nullptr) {
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auto canvasPropNames = _canvas->getPropertyNames(rt);
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for (auto& prop : canvasPropNames) {
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result.push_back(std::move(prop));
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}
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}
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return result;
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}
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SkRect inscribe(SkSize size, SkRect rect) {
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auto halfWidthDelta = (rect.width() - size.width()) / 2.0;
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auto halfHeightDelta = (rect.height() - size.height()) / 2.0;
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return SkRect::MakeXYWH(rect.x() + halfWidthDelta,
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rect.y() + halfHeightDelta, size.width(),
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size.height());
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}
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jsi::Value DrawableFrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& propName) {
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auto name = propName.utf8(runtime);
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if (name == "render") {
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auto render = JSI_HOST_FUNCTION_LAMBDA {
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if (_canvas == nullptr) {
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throw jsi::JSError(runtime, "Trying to render a Frame without a Skia Canvas! Did you install Skia?");
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}
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// convert CMSampleBuffer to SkImage
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auto context = _canvas->getCanvas()->recordingContext();
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auto image = SkImageHelpers::convertCMSampleBufferToSkImage(context, frame.buffer);
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// draw SkImage
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if (count > 0) {
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// ..with paint/shader
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auto paintHostObject = arguments[0].asObject(runtime).asHostObject<RNSkia::JsiSkPaint>(runtime);
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auto paint = paintHostObject->getObject();
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_canvas->getCanvas()->drawImage(image, 0, 0, SkSamplingOptions(), paint.get());
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} else {
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// ..without paint/shader
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_canvas->getCanvas()->drawImage(image, 0, 0);
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}
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return jsi::Value::undefined();
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};
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return jsi::Function::createFromHostFunction(runtime, jsi::PropNameID::forUtf8(runtime, "render"), 1, render);
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}
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if (name == "isDrawable") {
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return jsi::Value(_canvas != nullptr);
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}
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if (_canvas != nullptr) {
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// If we have a Canvas, try to access the property on there.
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auto result = _canvas->get(runtime, propName);
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if (!result.isUndefined()) {
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return result;
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}
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}
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// fallback to base implementation
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return FrameHostObject::get(runtime, propName);
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}
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void DrawableFrameHostObject::invalidateCanvas() {
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_canvas = nullptr;
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}
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