stuff-from-scratch/test/fonts/TestDirectWriteFontEngine.cpp

#include "TestFramework.h"
#include "TestUtils.h"

#include "DirectWriteHelpers.h"
#include "DirectWriteFontEngine.h"
#include "FileLogger.h"

#include "SvgDocument.h"
#include "SvgWriter.h"
#include "SvgShapeElements.h"
#include "File.h"
#include "FontItem.h"

TEST_CASE(TestDirectWriteFontEngine, "fonts")
{
	DirectWriteFontEngine font_engine;
	font_engine.initialize();

	auto glyph_run_outlines = font_engine.getGlyphRunOutlines({ 66 });
	auto path = glyph_run_outlines->toPostScriptPath();

	auto doc = std::make_unique<SvgDocument>();

	auto element = std::make_unique<SvgPath>();
	element->setPath(path);
	element->setFillRule("evenodd");

	doc->getRoot()->addChild(std::move(element));
	doc->setViewBox(-20.0, -20.0, 40.0, 40.0);

	auto writer = std::make_unique<SvgWriter>();
	auto doc_string = writer->toString(doc.get());

	File file(TestUtils::getTestOutputDir(__FILE__) / "out.svg");
	file.writeText(doc_string);

}

TEST_CASE(TestDirectWriteFontEngine_GlyphMetrics, "fonts")
{
	DirectWriteFontEngine font_engine;
	font_engine.initialize();

	FontItem font("Verdana", 16);

	const auto advance = font_engine.getHorizontalAdvance(font, "abc");
	MLOG_INFO("Advance is: " << advance);

	REQUIRE(advance != 0.0);
}