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 #include "sk_tool_utils.h" 10 11 #include "SkCanvas.h" 12 #include "SkTextBlob.h" 13 14 namespace skiagm { 15 class TextBlobBlockReordering : public GM { 16 public: 17 // This gm tests that textblobs translate properly when their draw order is different from their 18 // flush order 19 TextBlobBlockReordering() { } 20 21 protected: 22 void onOnceBeforeDraw() override { 23 SkTextBlobBuilder builder; 24 25 // make textblob 26 // Large text is used to trigger atlas eviction 27 SkPaint paint; 28 paint.setTextSize(56); 29 const char* text = "AB"; 30 sk_tool_utils::set_portable_typeface(&paint); 31 32 SkRect bounds; 33 paint.measureText(text, strlen(text), &bounds); 34 35 SkScalar yOffset = bounds.height(); 36 sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 30); 37 38 // build 39 fBlob = builder.make(); 40 } 41 42 SkString onShortName() override { 43 return SkString("textblobblockreordering"); 44 } 45 46 SkISize onISize() override { 47 return SkISize::Make(kWidth, kHeight); 48 } 49 50 // This draws the same text blob 3 times. The second draw used a different xfer mode so its 51 // GrDrawOp doesn't get combined with the first and third. Ultimately, they will be flushed in 52 // the order first, third, and then second. 53 void onDraw(SkCanvas* canvas) override { 54 canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorGRAY)); 55 56 SkPaint paint; 57 canvas->translate(10, 40); 58 59 SkRect bounds = fBlob->bounds(); 60 const int yDelta = SkScalarFloorToInt(bounds.height()) + 20; 61 const int xDelta = SkScalarFloorToInt(bounds.width()); 62 63 canvas->drawTextBlob(fBlob, 0, 0, paint); 64 65 canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta)); 66 67 // Draw a rect where the text should be, and then twiddle the xfermode so we don't combine. 68 SkPaint redPaint; 69 redPaint.setColor(SK_ColorRED); 70 canvas->drawRect(bounds, redPaint); 71 SkPaint srcInPaint(paint); 72 srcInPaint.setBlendMode(SkBlendMode::kSrcIn); 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 sk_sp<SkTextBlob> fBlob; 81 82 static constexpr int kWidth = 275; 83 static constexpr int kHeight = 200; 84 85 typedef GM INHERITED; 86 }; 87 88 ////////////////////////////////////////////////////////////////////////////// 89 90 DEF_GM(return new TextBlobBlockReordering;) 91 } 92
