From 7c5c9da436194c75d91797f114a87a6119ca255d Mon Sep 17 00:00:00 2001 From: bsalomon Date: Mon, 9 Jun 2014 15:11:30 -0700 Subject: GM/bench for text draws with various parameters and clip rects. R=jvanverth@google.com, robertphillips@google.com Author: bsalomon@google.com Review URL: https://codereview.chromium.org/319053002 --- gm/variedtext.cpp | 169 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 169 insertions(+) create mode 100644 gm/variedtext.cpp (limited to 'gm/variedtext.cpp') diff --git a/gm/variedtext.cpp b/gm/variedtext.cpp new file mode 100644 index 0000000000..e174796780 --- /dev/null +++ b/gm/variedtext.cpp @@ -0,0 +1,169 @@ +/* + * 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 "SkPath.h" +#include "SkTypeface.h" +#include "SkRandom.h" + +/** + * Draws text with random parameters. The text draws each get their own clip rect. It is also + * used as a bench to measure how well the GPU backend batches text draws. + */ + +class VariedTextGM : public skiagm::GM { +public: + VariedTextGM(bool effectiveClip, bool lcd) + : fEffectiveClip(effectiveClip) + , fLCD(lcd) { + memset(fTypefacesToUnref, 0, sizeof(fTypefacesToUnref)); + } + + ~VariedTextGM() { + for (size_t i = 0; i < SK_ARRAY_COUNT(fTypefacesToUnref); ++i) { + SkSafeUnref(fTypefacesToUnref[i]); + } + } + +protected: + virtual SkString onShortName() SK_OVERRIDE { + SkString name("varied_text"); + if (fEffectiveClip) { + name.append("_clipped"); + } else { + name.append("_ignorable_clip"); + } + if (fLCD) { + name.append("_lcd"); + } else { + name.append("_no_lcd"); + } + return name; + } + + virtual SkISize onISize() SK_OVERRIDE { + return SkISize::Make(640, 480); + } + + virtual void onOnceBeforeDraw() SK_OVERRIDE { + fPaint.setAntiAlias(true); + fPaint.setLCDRenderText(fLCD); + + SkISize size = this->getISize(); + SkScalar w = SkIntToScalar(size.fWidth); + SkScalar h = SkIntToScalar(size.fHeight); + + SK_COMPILE_ASSERT(4 == SK_ARRAY_COUNT(fTypefacesToUnref), typeface_cnt); + fTypefacesToUnref[0] = SkTypeface::CreateFromName("sans-serif", SkTypeface::kNormal); + fTypefacesToUnref[1] = SkTypeface::CreateFromName("sans-serif", SkTypeface::kBold); + fTypefacesToUnref[2] = SkTypeface::CreateFromName("serif", SkTypeface::kNormal); + fTypefacesToUnref[3] = SkTypeface::CreateFromName("serif", SkTypeface::kBold); + + SkRandom random; + for (int i = 0; i < kCnt; ++i) { + int length = random.nextRangeU(kMinLength, kMaxLength); + char text[kMaxLength]; + for (int j = 0; j < length; ++j) { + text[j] = (char)random.nextRangeU('!', 'z'); + } + fStrings[i].set(text, length); + + fColors[i] = random.nextU(); + fColors[i] |= 0xFF000000; + + static const SkScalar kMinPtSize = 8.f; + static const SkScalar kMaxPtSize = 32.f; + + fPtSizes[i] = random.nextRangeScalar(kMinPtSize, kMaxPtSize); + + fTypefaces[i] = fTypefacesToUnref[ + random.nextULessThan(SK_ARRAY_COUNT(fTypefacesToUnref))]; + + SkRect r; + fPaint.setColor(fColors[i]); + fPaint.setTypeface(fTypefaces[i]); + fPaint.setTextSize(fPtSizes[i]); + + fPaint.measureText(fStrings[i].c_str(), fStrings[i].size(), &r); + // safeRect is set of x,y positions where we can draw the string without hitting + // the GM's border. + SkRect safeRect = SkRect::MakeLTRB(-r.fLeft, -r.fTop, w - r.fRight, h - r.fBottom); + if (safeRect.isEmpty()) { + // If we don't fit then just don't worry about how we get cliped to the device + // border. + safeRect = SkRect::MakeWH(w, h); + } + fPositions[i].fX = random.nextRangeScalar(safeRect.fLeft, safeRect.fRight); + fPositions[i].fY = random.nextRangeScalar(safeRect.fTop, safeRect.fBottom); + + fClipRects[i] = r; + fClipRects[i].offset(fPositions[i].fX, fPositions[i].fY); + fClipRects[i].outset(2.f, 2.f); + + if (fEffectiveClip) { + fClipRects[i].fRight -= 0.25f * fClipRects[i].width(); + } + } + } + + virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { + for (int i = 0; i < kCnt; ++i) { + fPaint.setColor(fColors[i]); + fPaint.setTextSize(fPtSizes[i]); + fPaint.setTypeface(fTypefaces[i]); + + canvas->save(); + canvas->clipRect(fClipRects[i]); + canvas->translate(fPositions[i].fX, fPositions[i].fY); + canvas->drawText(fStrings[i].c_str(), fStrings[i].size(), 0, 0, fPaint); + canvas->restore(); + } + + // Visualize the clips, but not in bench mode. + if (kBench_Mode != this->getMode()) { + SkPaint wirePaint; + wirePaint.setAntiAlias(true); + wirePaint.setStrokeWidth(0); + wirePaint.setStyle(SkPaint::kStroke_Style); + for (int i = 0; i < kCnt; ++i) { + canvas->drawRect(fClipRects[i], wirePaint); + } + } + } + + virtual uint32_t onGetFlags() const SK_OVERRIDE { + // The aa hairline stroked rects used to visualize the clip draw slightly differently in + // quilt mode in dm. + return kAsBench_Flag | kSkipTiled_Flag; + } + +private: + static const int kCnt = 30; + static const int kMinLength = 15; + static const int kMaxLength = 40; + + bool fEffectiveClip; + bool fLCD; + SkTypeface* fTypefacesToUnref[4]; + SkPaint fPaint; + + // precomputed for each text draw + SkString fStrings[kCnt]; + SkColor fColors[kCnt]; + SkScalar fPtSizes[kCnt]; + SkTypeface* fTypefaces[kCnt]; + SkPoint fPositions[kCnt]; + SkRect fClipRects[kCnt]; + + typedef skiagm::GM INHERITED; +}; + +DEF_GM( return SkNEW(VariedTextGM(false, false)); ) +DEF_GM( return SkNEW(VariedTextGM(true, false)); ) +DEF_GM( return SkNEW(VariedTextGM(false, true)); ) +DEF_GM( return SkNEW(VariedTextGM(true, true)); ) -- cgit v1.2.3