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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
#include "SkDashPathEffect.h"
static void test_nulldev(SkCanvas* canvas) {
SkBitmap bm;
bm.setInfo(SkImageInfo::MakeN32Premul(30, 30));
// notice: no pixels mom! be sure we don't crash
// https://code.google.com/p/chromium/issues/detail?id=352616
SkCanvas c(bm);
SkBitmap src;
src.allocN32Pixels(10, 10);
src.eraseColor(SK_ColorRED);
// ensure we don't crash
c.writePixels(src, 0, 0);
}
static void draw_text_stroked(SkCanvas* canvas, const SkPaint& paint, SkScalar strokeWidth) {
SkPaint p(paint);
SkPoint loc = { 20, 435 };
if (strokeWidth > 0) {
p.setStyle(SkPaint::kFill_Style);
canvas->drawText("P", 1, loc.fX, loc.fY - 225, p);
canvas->drawPosText("P", 1, &loc, p);
}
p.setColor(SK_ColorRED);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(strokeWidth);
canvas->drawText("P", 1, loc.fX, loc.fY - 225, p);
canvas->drawPosText("P", 1, &loc, p);
}
static void draw_text_set(SkCanvas* canvas, const SkPaint& paint) {
SkAutoCanvasRestore acr(canvas, true);
draw_text_stroked(canvas, paint, 10);
canvas->translate(200, 0);
draw_text_stroked(canvas, paint, 0);
const SkScalar intervals[] = { 20, 10, 5, 10 };
const SkScalar phase = 0;
canvas->translate(200, 0);
SkPaint p(paint);
p.setPathEffect(SkDashPathEffect::Create(intervals, SK_ARRAY_COUNT(intervals), phase))->unref();
draw_text_stroked(canvas, p, 10);
}
class StrokeTextGM : public skiagm::GM {
// Skia has a threshold above which it draws text via paths instead of using scalercontext
// and caching the glyph. This GM wants to ensure that we draw stroking correctly on both
// sides of this threshold.
enum {
kBelowThreshold_TextSize = 255,
kAboveThreshold_TextSize = 257
};
public:
StrokeTextGM() {}
protected:
virtual uint32_t onGetFlags() const SK_OVERRIDE {
return kSkipTiled_Flag;
}
virtual SkString onShortName() SK_OVERRIDE {
return SkString("stroketext");
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(1200, 480);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
if (true) { test_nulldev(canvas); }
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setTextSize(kBelowThreshold_TextSize);
draw_text_set(canvas, paint);
canvas->translate(600, 0);
paint.setTextSize(kAboveThreshold_TextSize);
draw_text_set(canvas, paint);
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return SkNEW(StrokeTextGM); )
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