bigtext.cpp

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/*
 * Copyright 2013 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/SkData.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypeface.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"
 
/**
 *  Skia may draw from outlines when the size is very large, so we exercise that
 *  here.
*/
 
class BigTextGM : public skiagm::GM {
public:
    BigTextGM() {}
 
protected:
    SkString getName() const override { return SkString("bigtext"); }
 
    SkISize getISize() override { return SkISize::Make(640, 480); }
 
    void onDraw(SkCanvas* canvas) override {
        SkPaint paint;
        paint.setAntiAlias(true);
        SkFont font(ToolUtils::DefaultPortableTypeface(), 1500);
 
        SkRect r;
        (void)font.measureText("/", 1, SkTextEncoding::kUTF8, &r);
        SkPoint pos = {
            this->width()/2 - r.centerX(),
            this->height()/2 - r.centerY()
        };
 
        paint.setColor(SK_ColorRED);
        canvas->drawSimpleText("/", 1, SkTextEncoding::kUTF8, pos.fX, pos.fY, font, paint);
 
        paint.setColor(SK_ColorBLUE);
        canvas->drawSimpleText("\\", 1, SkTextEncoding::kUTF8, pos.fX, pos.fY, font, paint);
    }
 
private:
    using INHERITED = skiagm::GM;
};
 
DEF_GM(return new BigTextGM;)
 
// Exercise the case where the glyph is sufficiently large that we should just draw with a path,
// but the DirectWrite scaler context failed to calculate the bounds and reported empty bounds.
// With empty bounds the glyph was discarded instead of rendered from path. See crbug.com/1370488
DEF_SIMPLE_GM(bigtext_crbug_1370488, canvas, 512, 512) {
    auto typeface = ToolUtils::CreateTypefaceFromResource("fonts/SpiderSymbol.ttf");
    const char* text = "\xEF\x80\xA1";
    if (!typeface) {
        typeface = ToolUtils::DefaultPortableTypeface();
        text = "H";
    }
 
    SkFont font(typeface, 12.f);
    canvas->translate(-1800.f, 1800.f);
    canvas->scale(437.5f, 437.5f);
    SkPaint paint;
    paint.setAntiAlias(true);
    canvas->drawString(text, 0.f, 0.f, font, paint);
}