joshualitt | 44c4851 | 2015-08-01 07:33:41 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 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 "Resources.h" |
| 11 | #include "SkCanvas.h" |
| 12 | #include "SkGradientShader.h" |
| 13 | #include "SkStream.h" |
| 14 | #include "SkSurface.h" |
| 15 | #include "SkTextBlob.h" |
| 16 | #include "SkTypeface.h" |
| 17 | #include "../src/fonts/SkRandomScalerContext.h" |
| 18 | |
| 19 | #if SK_SUPPORT_GPU |
| 20 | |
| 21 | #include "GrContext.h" |
| 22 | |
| 23 | namespace skiagm { |
| 24 | class TextBlobRandomFont : public GM { |
| 25 | public: |
| 26 | // This gm tests that textblobs can be translated and scaled with a font that returns random |
| 27 | // but deterministic masks |
| 28 | TextBlobRandomFont() { } |
| 29 | |
| 30 | protected: |
| 31 | void onOnceBeforeDraw() override { |
| 32 | SkTextBlobBuilder builder; |
| 33 | |
| 34 | const char* text = "The quick brown fox jumps over the lazy dog."; |
| 35 | |
| 36 | // make textbloben |
| 37 | SkPaint paint; |
| 38 | paint.setTextSize(32); |
| 39 | paint.setLCDRenderText(true); |
| 40 | |
| 41 | // Setup our random scaler context |
| 42 | SkAutoTUnref<SkTypeface> orig(sk_tool_utils::create_portable_typeface("sans-serif", |
| 43 | SkTypeface::kBold)); |
| 44 | if (NULL == orig) { |
| 45 | orig.reset(SkTypeface::RefDefault()); |
| 46 | } |
| 47 | SkAutoTUnref<SkTypeface> random(SkNEW_ARGS(SkRandomTypeface, (orig, paint, false))); |
| 48 | paint.setTypeface(random); |
| 49 | |
| 50 | SkRect bounds; |
| 51 | paint.measureText(text, strlen(text), &bounds); |
| 52 | |
| 53 | SkScalar yOffset = bounds.height(); |
| 54 | sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0); |
| 55 | |
| 56 | // A8 |
| 57 | paint.setSubpixelText(false); |
| 58 | paint.setLCDRenderText(false); |
| 59 | sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 32); |
| 60 | |
| 61 | // build |
| 62 | fBlob.reset(builder.build()); |
| 63 | } |
| 64 | |
| 65 | SkString onShortName() override { |
| 66 | return SkString("textblobrandomfont"); |
| 67 | } |
| 68 | |
| 69 | SkISize onISize() override { |
| 70 | return SkISize::Make(kWidth, kHeight); |
| 71 | } |
| 72 | |
| 73 | void onDraw(SkCanvas* canvas) override { |
| 74 | // This GM exists to test a specific feature of the GPU backend. |
| 75 | if (NULL == canvas->getGrContext()) { |
| 76 | this->drawGpuOnlyMessage(canvas); |
| 77 | return; |
| 78 | } |
| 79 | |
| 80 | canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorWHITE)); |
| 81 | |
| 82 | SkImageInfo info = SkImageInfo::MakeN32Premul(kWidth, kHeight); |
| 83 | SkSurfaceProps props(0, kUnknown_SkPixelGeometry); |
| 84 | SkAutoTUnref<SkSurface> surface(canvas->newSurface(info, &props)); |
| 85 | if (surface) { |
| 86 | SkPaint paint; |
| 87 | paint.setAntiAlias(true); |
| 88 | |
| 89 | SkCanvas* c = surface->getCanvas(); |
| 90 | |
| 91 | int stride = SkScalarCeilToInt(fBlob->bounds().height() / 2) + 10; |
| 92 | int yOffset = stride; |
| 93 | for (int i = 0; i < 10; i++) { |
| 94 | // fiddle the canvas to force regen of textblobs |
| 95 | canvas->rotate(i % 2 ? 0.0f : -0.05f); |
| 96 | canvas->drawTextBlob(fBlob, 10.0f, SkIntToScalar(yOffset), paint); |
| 97 | yOffset += stride; |
| 98 | |
| 99 | // This will draw as black boxes |
| 100 | c->drawTextBlob(fBlob, 10, SkIntToScalar(yOffset), paint); |
| 101 | surface->draw(canvas, 0, 0, nullptr); |
| 102 | |
| 103 | // free gpu resources and verify |
| 104 | yOffset += stride; |
| 105 | canvas->getGrContext()->freeGpuResources(); |
| 106 | canvas->drawTextBlob(fBlob, 10, SkIntToScalar(yOffset), paint); |
| 107 | |
| 108 | yOffset += stride; |
| 109 | } |
| 110 | |
| 111 | } else { |
| 112 | const char* text = "This test requires a surface"; |
| 113 | size_t len = strlen(text); |
| 114 | SkPaint paint; |
| 115 | canvas->drawText(text, len, 10, 100, paint); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | private: |
| 120 | SkAutoTUnref<const SkTextBlob> fBlob; |
| 121 | |
| 122 | static const int kWidth = 1000; |
| 123 | static const int kHeight = 1000; |
| 124 | |
| 125 | typedef GM INHERITED; |
| 126 | }; |
| 127 | |
| 128 | ////////////////////////////////////////////////////////////////////////////// |
| 129 | |
| 130 | DEF_GM( return SkNEW(TextBlobRandomFont); ) |
| 131 | } |
| 132 | #endif |