1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "gm.h" 9 10 #include "SkCanvas.h" 11 #include "SkTextBlob.h" 12 13 namespace skiagm { 14 class TextBlobBlockReordering : public GM { 15 public: 16 // This gm tests that textblobs translate properly when their draw order is different from their 17 // flush order TextBlobBlockReordering()18 TextBlobBlockReordering() { } 19 20 protected: onOnceBeforeDraw()21 void onOnceBeforeDraw() override { 22 SkTextBlobBuilder builder; 23 24 // make textblob 25 // Large text is used to trigger atlas eviction 26 SkPaint paint; 27 paint.setTextSize(56); 28 const char* text = "AB"; 29 sk_tool_utils::set_portable_typeface(&paint); 30 31 SkRect bounds; 32 paint.measureText(text, strlen(text), &bounds); 33 34 SkScalar yOffset = bounds.height(); 35 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 30); 36 37 // build 38 fBlob.reset(builder.build()); 39 } 40 onShortName()41 SkString onShortName() override { 42 return SkString("textblobblockreordering"); 43 } 44 onISize()45 SkISize onISize() override { 46 return SkISize::Make(kWidth, kHeight); 47 } 48 49 // This draws the same text blob 3 times. The second draw used a different 50 // xfer mode so it doens't get batched with the first and third. 51 // ultimately thye iwll be flushed in the order first, third, and then second onDraw(SkCanvas * canvas)52 void onDraw(SkCanvas* canvas) override { 53 canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorGRAY)); 54 55 SkPaint paint; 56 canvas->translate(10, 40); 57 58 SkRect bounds = fBlob->bounds(); 59 const int yDelta = SkScalarFloorToInt(bounds.height()) + 20; 60 const int xDelta = SkScalarFloorToInt(bounds.width()); 61 62 canvas->drawTextBlob(fBlob, 0, 0, paint); 63 64 canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta)); 65 66 // draw a rect where the text should be, and then twiddle the xfermode 67 // so we don't batch 68 SkPaint redPaint; 69 redPaint.setColor(SK_ColorRED); 70 canvas->drawRect(bounds, redPaint); 71 SkPaint srcInPaint(paint); 72 srcInPaint.setXfermodeMode(SkXfermode::kSrcIn_Mode); 73 canvas->drawTextBlob(fBlob, 0, 0, srcInPaint); 74 75 canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta)); 76 canvas->drawTextBlob(fBlob, 0, 0, paint); 77 } 78 79 private: 80 SkAutoTUnref<const SkTextBlob> fBlob; 81 82 static const int kWidth = 275; 83 static const int kHeight = 200; 84 85 typedef GM INHERITED; 86 }; 87 88 ////////////////////////////////////////////////////////////////////////////// 89 90 DEF_GM(return new TextBlobBlockReordering;) 91 } 92