gm/getpostextpath.cpp

/*
 * Copyright 2012 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/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPoint.h"
#include "include/core/SkScalar.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "include/private/SkTemplates.h"
#include "src/core/SkFontPriv.h"
#include "src/core/SkRandom.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"

#include <string.h>

using namespace skia_private;

static void strokePath(SkCanvas* canvas, const SkPath& path) {
    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setColor(SK_ColorRED);
    paint.setStyle(SkPaint::kStroke_Style);
    canvas->drawPath(path, paint);
}
DEF_SIMPLE_GM(getpostextpath, canvas, 480, 780) {
    // explicitly add spaces, to test a prev. bug
    const char* text = "Ham bur ge fons";
    size_t len = strlen(text);
    SkFont font = ToolUtils::DefaultPortableFont();
    font.setSize(48);

    SkPaint paint;
    paint.setAntiAlias(true);

    canvas->translate(SkIntToScalar(10), SkIntToScalar(64));

    canvas->drawSimpleText(text, len, SkTextEncoding::kUTF8, 0, 0, font, paint);
    SkPath path = ToolUtils::get_text_path(font, text, len, SkTextEncoding::kUTF8, nullptr);
    strokePath(canvas, path);

    SkAutoToGlyphs atg(font, text, len, SkTextEncoding::kUTF8);
    const size_t count = atg.count();
    AutoTArray<SkPoint>  pos(count);
    AutoTArray<SkScalar> widths(count);
    font.getWidths(atg.glyphs(), widths);

    SkRandom rand;
    SkScalar x = SkIntToScalar(20);
    SkScalar y = SkIntToScalar(100);
    for (size_t i = 0; i < count; ++i) {
        pos[i].set(x, y + rand.nextSScalar1() * 24);
        x += widths[i];
    }

    canvas->translate(0, SkIntToScalar(64));

    canvas->drawTextBlob(SkTextBlob::MakeFromPosText(text, len, pos, font), 0, 0, paint);
    path = ToolUtils::get_text_path(font, text, len, SkTextEncoding::kUTF8, &pos[0]);
    strokePath(canvas, path);
}