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| 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 |
| 18 TextBlobBlockReordering() { } |
| 19 |
| 20 protected: |
| 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 |
| 41 SkString onShortName() override { |
| 42 return SkString("textblobblockreordering"); |
| 43 } |
| 44 |
| 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 secon
d |
| 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 } |
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