| /* |
| * 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) { |
| } |
| |
| protected: |
| SkString onShortName() 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; |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(640, 480); |
| } |
| |
| void onOnceBeforeDraw() override { |
| fPaint.setAntiAlias(true); |
| fPaint.setLCDRenderText(fLCD); |
| |
| SkISize size = this->getISize(); |
| SkScalar w = SkIntToScalar(size.fWidth); |
| SkScalar h = SkIntToScalar(size.fHeight); |
| |
| static_assert(4 == SK_ARRAY_COUNT(fTypefaces), "typeface_cnt"); |
| fTypefaces[0] = sk_tool_utils::create_portable_typeface("sans-serif", SkTypeface::kNormal); |
| fTypefaces[1] = sk_tool_utils::create_portable_typeface("sans-serif", SkTypeface::kBold); |
| fTypefaces[2] = sk_tool_utils::create_portable_typeface("serif", SkTypeface::kNormal); |
| fTypefaces[3] = sk_tool_utils::create_portable_typeface("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; |
| fColors[i] = sk_tool_utils::color_to_565(fColors[i]); |
| |
| static const SkScalar kMinPtSize = 8.f; |
| static const SkScalar kMaxPtSize = 32.f; |
| |
| fPtSizes[i] = random.nextRangeScalar(kMinPtSize, kMaxPtSize); |
| |
| fTypefaceIndices[i] = random.nextULessThan(SK_ARRAY_COUNT(fTypefaces)); |
| |
| SkRect r; |
| fPaint.setColor(fColors[i]); |
| fPaint.setTypeface(fTypefaces[fTypefaceIndices[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(); |
| } |
| } |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| for (int i = 0; i < kCnt; ++i) { |
| fPaint.setColor(fColors[i]); |
| fPaint.setTextSize(fPtSizes[i]); |
| fPaint.setTypeface(fTypefaces[fTypefaceIndices[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); |
| } |
| } |
| } |
| |
| bool runAsBench() const override { return true; } |
| |
| private: |
| static const int kCnt = 30; |
| static const int kMinLength = 15; |
| static const int kMaxLength = 40; |
| |
| bool fEffectiveClip; |
| bool fLCD; |
| sk_sp<SkTypeface> fTypefaces[4]; |
| SkPaint fPaint; |
| |
| // precomputed for each text draw |
| SkString fStrings[kCnt]; |
| SkColor fColors[kCnt]; |
| SkScalar fPtSizes[kCnt]; |
| int fTypefaceIndices[kCnt]; |
| SkPoint fPositions[kCnt]; |
| SkRect fClipRects[kCnt]; |
| |
| typedef skiagm::GM INHERITED; |
| }; |
| |
| DEF_GM(return new VariedTextGM(false, false);) |
| DEF_GM(return new VariedTextGM(true, false);) |
| DEF_GM(return new VariedTextGM(false, true);) |
| DEF_GM(return new VariedTextGM(true, true);) |