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/gm.h" 9 #include "include/core/SkBlendMode.h" 10 #include "include/core/SkCanvas.h" 11 #include "include/core/SkColor.h" 12 #include "include/core/SkFont.h" 13 #include "include/core/SkFontTypes.h" 14 #include "include/core/SkPaint.h" 15 #include "include/core/SkRect.h" 16 #include "include/core/SkRefCnt.h" 17 #include "include/core/SkScalar.h" 18 #include "include/core/SkSize.h" 19 #include "include/core/SkString.h" 20 #include "include/core/SkTextBlob.h" 21 #include "include/core/SkTypeface.h" 22 #include "tools/ToolUtils.h" 23 24 #include <string.h> 25 26 namespace skiagm { 27 class TextBlobBlockReordering : public GM { 28 public: 29 // This gm tests that textblobs translate properly when their draw order is different from their 30 // flush order TextBlobBlockReordering()31 TextBlobBlockReordering() { } 32 33 protected: onOnceBeforeDraw()34 void onOnceBeforeDraw() override { 35 SkTextBlobBuilder builder; 36 37 // make textblob 38 // Large text is used to trigger atlas eviction 39 SkFont font(ToolUtils::create_portable_typeface(), 56); 40 font.setEdging(SkFont::Edging::kAlias); 41 const char* text = "AB"; 42 43 SkRect bounds; 44 font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds); 45 46 SkScalar yOffset = bounds.height(); 47 ToolUtils::add_to_text_blob(&builder, text, font, 0, yOffset - 30); 48 49 // build 50 fBlob = builder.make(); 51 } 52 onShortName()53 SkString onShortName() override { 54 return SkString("textblobblockreordering"); 55 } 56 onISize()57 SkISize onISize() override { 58 return SkISize::Make(kWidth, kHeight); 59 } 60 61 // This draws the same text blob 3 times. The second draw used a different xfer mode so its 62 // GrDrawOp doesn't get combined with the first and third. Ultimately, they will be flushed in 63 // the order first, third, and then second. onDraw(SkCanvas * canvas)64 void onDraw(SkCanvas* canvas) override { 65 canvas->drawColor(SK_ColorGRAY); 66 67 SkPaint paint; 68 canvas->translate(10, 40); 69 70 SkRect bounds = fBlob->bounds(); 71 const int yDelta = SkScalarFloorToInt(bounds.height()) + 20; 72 const int xDelta = SkScalarFloorToInt(bounds.width()); 73 74 canvas->drawTextBlob(fBlob, 0, 0, paint); 75 76 canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta)); 77 78 // Draw a rect where the text should be, and then twiddle the xfermode so we don't combine. 79 SkPaint redPaint; 80 redPaint.setColor(SK_ColorRED); 81 canvas->drawRect(bounds, redPaint); 82 SkPaint srcInPaint(paint); 83 srcInPaint.setBlendMode(SkBlendMode::kSrcIn); 84 canvas->drawTextBlob(fBlob, 0, 0, srcInPaint); 85 86 canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta)); 87 canvas->drawTextBlob(fBlob, 0, 0, paint); 88 } 89 90 private: 91 sk_sp<SkTextBlob> fBlob; 92 93 inline static constexpr int kWidth = 275; 94 inline static constexpr int kHeight = 200; 95 96 using INHERITED = GM; 97 }; 98 99 ////////////////////////////////////////////////////////////////////////////// 100 101 DEF_GM(return new TextBlobBlockReordering;) 102 } // namespace skiagm 103