skiaYoga2.cpp

#include <iostream>
#include <map>
#include <string>
#include <algorithm>
#include <yoga/Yoga.h>
#include <yoga/YGNode.h>
#include <yoga/YGLayout.h>
#include <yoga/YGStyle.h>
#include <skia/core/SkCanvas.h>
#include <skia/core/SkColor.h>
#include <skia/core/SkFont.h>
#include <skia/encode/SkPngEncoder.h>
#include <skia/encode/SkEncoder.h>
#include <skia/core/SkBitmap.h>
#include <skia/core/SkSurface.h>
#include <skia/core/SkStream.h>
#include <skia/core/SkImage.h>
#include <fstream>
#include <cstdlib>
#include <ctime>
void addNode(const YGNodeRef root, const YGConfigRef config) {

	const YGNodeRef child1 = YGNodeNewWithConfig(config);
	
	int index = YGNodeGetChildCount(root);
	
	YGNodeStyleSetWidth(child1, 100);
	YGNodeStyleSetHeight(child1, 100);
	YGNodeInsertChild(root, child1, index);

	return ;

}

void iterateOverNodes(const YGNodeRef root, SkCanvas * canvas) {
	
	int count = YGNodeGetChildCount(root);
	
	SkColor4f color[] = { SkColors::kBlue, SkColors::kGreen, SkColors::kGray , SkColors::kMagenta, SkColors::kBlack};

	
	for (int index = 0; index < count; index++) {
		int rand_index = std::rand() % 5;
		std::cout << "Random value is " << rand_index << "\n";
		YGNodeRef node = YGNodeGetChild(root, index);
		SkRect rect;
		SkPaint paint;
		rect.setXYWH(YGNodeLayoutGetLeft(node), YGNodeLayoutGetTop(node), YGNodeLayoutGetWidth(node), YGNodeLayoutGetHeight(node));
		std::cout << YGNodeLayoutGetHeight(node) << "\n";
		std::cout << YGNodeLayoutGetWidth(node) << "\n";
		std::cout << YGNodeLayoutGetTop(node) << "\n";
		std::cout << YGNodeLayoutGetBottom(node) << "\n";
		paint.setColor(color[rand_index]);

		canvas->drawRect(rect, paint);
	}
}

int main() {

	std::srand(std::time(0));


	const YGConfigRef config = YGConfigNew();


	const YGNodeRef root = YGNodeNewWithConfig(config);
	YGNodeStyleSetFlexDirection(root, YGFlexDirection::YGFlexDirectionRow);
	YGNodeStyleSetDirection(root, YGDirection::YGDirectionLTR);
	YGNodeStyleSetJustifyContent(root, YGJustifyCenter);
	YGNodeStyleSetAlignItems(root, YGAlignCenter);
	YGNodeStyleSetAlignContent(root, YGAlignCenter);
	YGNodeStyleSetWidth(root, 400);
	YGNodeStyleSetHeight(root, 400);


	addNode(root, config);

	addNode(root, config);
	
	addNode(root, config);

	addNode(root, config);

	YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirection::YGDirectionLTR);

	
	

	SkBitmap bitmap{};
	bitmap.allocN32Pixels(400, 400);


	SkCanvas canvas{ bitmap };


	SkRect rect1;
	SkPaint paint1;
	paint1.setColor(SkColors::kCyan);
	rect1.fBottom = SkFloatToScalar(400.0f);
	rect1.fTop = SkFloatToScalar(0.0f);
	rect1.fLeft = SkFloatToScalar(0.0f);
	rect1.fRight = SkFloatToScalar(400.0f);

	canvas.drawRect(rect1, paint1);



	iterateOverNodes(root, &canvas);



	auto data = SkEncodeBitmap(bitmap, SkEncodedImageFormat::kPNG, 80);

	std::ofstream file("img.png", std::ios_base::out | std::ios_base::binary);

	file.write((const char*)data.get()->bytes(), data->size());

	file.close();

}