FuzzCOLRv1.cpp File Reference

#include "include/core/SkCanvas.h"
#include "include/core/SkData.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkStream.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTypeface.h"
#include "tools/fonts/FontToolUtils.h"
#include <algorithm>

Go to the source code of this file.

Functions
void	FuzzCOLRv1 (const uint8_t *data, size_t size)

Function Documentation

FuzzCOLRv1()

void FuzzCOLRv1	(	const uint8_t *	data,
		size_t	size
	)

Definition at line 19 of file FuzzCOLRv1.cpp.

                                                  {
    // We do not want the portable fontmgr here, as it does not allow creation of fonts from bytes.
    sk_sp<SkFontMgr> mgr = ToolUtils::TestFontMgr();
    std::unique_ptr<SkStreamAsset> stream = SkMemoryStream::MakeDirect(data, size);
    sk_sp<SkTypeface> typeface = mgr->makeFromStream(std::move(stream), 0);
 
    if (!typeface) {
        return;
    }
 
    auto s = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(128, 128));
    if (!s) {
        return;
    }
 
    // Place at a baseline in the lower part of the canvas square, but canvas size and baseline
    // placement are chosen arbitrarily and we just need to cover colrv1 rendering in this
    // fuzz test.
    SkFont colrv1Font = SkFont(typeface, 120);
    SkCanvas* canvas = s->getCanvas();
    SkPaint paint;
    int numGlyphs = typeface->countGlyphs();
 
    for (int i = 0; i < std::min(numGlyphs, 10); ++i) {
        SkPoint origin = SkPoint::Make(10, 108);
        SkPoint position = SkPoint::Make(0, 0);
        SkGlyphID glyphId = i;
        canvas->drawGlyphs(1, &glyphId, &position, origin, colrv1Font, paint);
    }
}