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- /*
- * 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 {
- static constexpr SkScalar kTextHeight = 36;
- SkScalar fY = kTextHeight;
- SkString onShortName() override { return SkString("lcdtext"); }
- SkISize onISize() override { return {640, 480}; }
- void onDraw(SkCanvas* canvas) override {
- fY = kTextHeight;
- 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, kTextHeight);
- if (subpixelTextEnabled) {
- font.setSubpixel(true);
- }
- if (lcdRenderTextEnabled) {
- font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
- }
- canvas->drawString(string, 0, fY, font, paint);
- fY += kTextHeight;
- }
- };
- /*
- * 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 {
- static void ScaleAbout(SkCanvas* canvas, SkScalar sx, SkScalar sy, SkScalar px, SkScalar py) {
- SkMatrix m;
- m.setScale(sx, sy, px, py);
- canvas->concat(m);
- }
- SkString onShortName() override { return SkString("lcdtextsize"); }
- SkISize onISize() override { return {320, 120}; }
- void onDraw(SkCanvas* canvas) override {
- const char* lcd_text = "LCD";
- const char* gray_text = "GRAY";
- constexpr static float kLCDTextSizeLimit = 48;
- 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());
- }
- }
- };
- DEF_GM( return new LcdTextGM; )
- DEF_GM( return new LcdTextSizeGM; )
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