skia2/gm/slug.cpp

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/*
* Copyright 2021 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontStyle.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/private/SkTDArray.h"
#include "include/private/chromium/GrSlug.h"
#include "tools/ToolUtils.h"
#if SK_SUPPORT_GPU && defined(SK_EXPERIMENTAL_SIMULATE_DRAWGLYPHRUNLIST_WITH_SLUG)
class SlugGM : public skiagm::GM {
public:
SlugGM(const char* txt)
: fText(txt) {
}
protected:
void onOnceBeforeDraw() override {
fTypeface = ToolUtils::create_portable_typeface("serif", SkFontStyle());
SkFont font(fTypeface);
size_t txtLen = strlen(fText);
int glyphCount = font.countText(fText, txtLen, SkTextEncoding::kUTF8);
fGlyphs.append(glyphCount);
font.textToGlyphs(fText, txtLen, SkTextEncoding::kUTF8, fGlyphs.begin(), glyphCount);
}
SkString onShortName() override {
return SkString("slug");
}
SkISize onISize() override {
return SkISize::Make(1000, 480);
}
void onDraw(SkCanvas* canvas) override {
sk_sp<SkTextBlob> blob(this->makeBlob());
SkPaint p;
p.setAntiAlias(true);
canvas->clipIRect(SkIRect::MakeSize(this->getISize()).makeInset(40, 50));
canvas->scale(1.3f, 1.3f);
sk_sp<GrSlug> slug = GrSlug::ConvertBlob(canvas, *blob, {10, 10}, p);
if (slug == nullptr) {
return;
}
canvas->translate(0.5, 0.5);
canvas->translate(30, 30);
canvas->drawTextBlob(blob, 10, 10, p);
canvas->translate(370, 0);
slug->draw(canvas);
for (float scale = 1.5; scale < 4; scale += 0.5) {
canvas->translate(-370, 20 * scale);
canvas->save();
canvas->scale(scale, scale);
canvas->rotate(5);
canvas->drawTextBlob(blob, 10, 10, p);
canvas->restore();
canvas->translate(370, 0);
canvas->save();
canvas->scale(scale, scale);
canvas->rotate(5);
slug->draw(canvas);
canvas->restore();
}
}
private:
sk_sp<SkTextBlob> makeBlob() {
SkTextBlobBuilder builder;
SkFont font;
font.setSubpixel(true);
font.setEdging(SkFont::Edging::kAntiAlias);
font.setTypeface(fTypeface);
font.setSize(16);
const SkTextBlobBuilder::RunBuffer& buf = builder.allocRun(font, fGlyphs.count(), 0, 0);
memcpy(buf.glyphs, fGlyphs.begin(), fGlyphs.count() * sizeof(uint16_t));
return builder.make();
}
SkTDArray<uint16_t> fGlyphs;
sk_sp<SkTypeface> fTypeface;
const char* fText;
using INHERITED = skiagm::GM;
};
DEF_GM(return new SlugGM("hamburgefons");)
#endif