blob: fc6eb12721794b4a16d6f37a47b278f8910c078c [file] [log] [blame]
/*
* Copyright 2011 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/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
class LcdTextGM : public skiagm::GM {
public:
LcdTextGM() {
const int pointSize = 36;
textHeight = SkIntToScalar(pointSize);
}
protected:
SkString onShortName() {
return SkString("lcdtext");
}
SkISize onISize() { return SkISize::Make(640, 480); }
virtual void onDraw(SkCanvas* canvas) {
y = textHeight;
drawText(canvas, SkString("TEXT: SubpixelTrue LCDRenderTrue"),
true, true);
drawText(canvas, SkString("TEXT: SubpixelTrue LCDRenderFalse"),
true, false);
drawText(canvas, SkString("TEXT: SubpixelFalse LCDRenderTrue"),
false, true);
drawText(canvas, SkString("TEXT: SubpixelFalse LCDRenderFalse"),
false, false);
}
void drawText(SkCanvas* canvas, const SkString& string,
bool subpixelTextEnabled, bool lcdRenderTextEnabled) {
SkPaint paint;
paint.setColor(SK_ColorBLACK);
paint.setDither(true);
SkFont font(nullptr, textHeight);
if (subpixelTextEnabled) {
font.setSubpixel(true);
}
if (lcdRenderTextEnabled) {
font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
}
canvas->drawString(string, 0, y, font, paint);
y += textHeight;
}
private:
typedef skiagm::GM INHERITED;
SkScalar y, textHeight;
};
/*
* Skia will automatically disable LCD requests if the total size exceeds some limit
* (hard coded in this test for now, as it is now avaiable as an API)
*
* Test this both by changing "textsize" and by changing the computed size (textsize * CTM)
*/
class LcdTextSizeGM : public skiagm::GM {
enum {
kLCDTextSizeLimit = 48
};
static void ScaleAbout(SkCanvas* canvas, SkScalar sx, SkScalar sy, SkScalar px, SkScalar py) {
SkMatrix m;
m.setScale(sx, sy, px, py);
canvas->concat(m);
}
public:
LcdTextSizeGM() {}
protected:
SkString onShortName() {
return SkString("lcdtextsize");
}
SkISize onISize() { return SkISize::Make(320, 120); }
virtual void onDraw(SkCanvas* canvas) {
const char* lcd_text = "LCD";
const char* gray_text = "GRAY";
const struct {
SkPoint fLoc;
SkScalar fTextSize;
SkScalar fScale;
const char* fText;
} rec[] = {
{ { 10, 50 }, kLCDTextSizeLimit - 1, 1, lcd_text },
{ { 160, 50 }, kLCDTextSizeLimit + 1, 1, gray_text },
{ { 10, 100 }, kLCDTextSizeLimit / 2, 1.99f, lcd_text },
{ { 160, 100 }, kLCDTextSizeLimit / 2, 2.01f, gray_text },
};
for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
const SkPoint loc = rec[i].fLoc;
SkAutoCanvasRestore acr(canvas, true);
SkFont font(nullptr, rec[i].fTextSize);
font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
ScaleAbout(canvas, rec[i].fScale, rec[i].fScale, loc.x(), loc.y());
canvas->drawString(rec[i].fText, loc.x(), loc.y(), font, SkPaint());
}
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new LcdTextGM; )
DEF_GM( return new LcdTextSizeGM; )