commit-bot@chromium.org | 7fa22f3 | 2013-06-18 15:37:27 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2013 Google Inc. |
| 3 | * |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #include "BaseExample.h" |
| 11 | |
| 12 | #include "SkApplication.h" |
| 13 | #include "SkDraw.h" |
| 14 | #include "SkGradientShader.h" |
| 15 | #include "SkGraphics.h" |
| 16 | #include "SkUnitMappers.h" |
| 17 | |
| 18 | class HelloSkia : public BaseExample { |
| 19 | public: |
| 20 | HelloSkia(void* hWnd, int argc, char** argv) |
| 21 | : INHERITED(hWnd, argc, argv) |
| 22 | { |
| 23 | fBGColor = SK_ColorWHITE; |
| 24 | fRotationAngle = SkIntToScalar(0); |
| 25 | |
| 26 | setupBackend(kGPU_DeviceType); |
| 27 | // Another option is software rendering: |
| 28 | // setupBackend(kRaster_DeviceType); |
| 29 | } |
| 30 | |
| 31 | protected: |
| 32 | virtual void draw(SkCanvas* canvas) SK_OVERRIDE { |
| 33 | // Clear background |
| 34 | canvas->drawColor(fBGColor); |
| 35 | |
| 36 | SkPaint paint; |
| 37 | paint.setColor(SK_ColorRED); |
| 38 | |
| 39 | // Draw a rectangle with blue paint |
| 40 | SkRect rect = { |
| 41 | SkIntToScalar(10), SkIntToScalar(10), |
| 42 | SkIntToScalar(128), SkIntToScalar(128) |
| 43 | }; |
| 44 | canvas->drawRect(rect, paint); |
| 45 | |
| 46 | // Set up a linear gradient and draw a circle |
| 47 | { |
| 48 | SkPoint linearPoints[] = { |
| 49 | {SkIntToScalar(0), SkIntToScalar(0)}, |
| 50 | {SkIntToScalar(300), SkIntToScalar(300)} |
| 51 | }; |
| 52 | SkColor linearColors[] = {SK_ColorGREEN, SK_ColorBLACK}; |
| 53 | |
| 54 | SkUnitMapper* linearMapper = new SkDiscreteMapper(100); |
| 55 | SkAutoUnref lm_deleter(linearMapper); |
| 56 | |
| 57 | SkShader* shader = SkGradientShader::CreateLinear( |
| 58 | linearPoints, linearColors, NULL, 2, |
| 59 | SkShader::kMirror_TileMode, linearMapper); |
| 60 | SkAutoUnref shader_deleter(shader); |
| 61 | |
| 62 | paint.setShader(shader); |
| 63 | paint.setFlags(SkPaint::kAntiAlias_Flag); |
| 64 | |
| 65 | canvas->drawCircle(SkIntToScalar(200), SkIntToScalar(200), |
| 66 | SkIntToScalar(64), paint); |
| 67 | |
| 68 | // Detach shader |
| 69 | paint.setShader(NULL); |
| 70 | } |
| 71 | |
| 72 | |
| 73 | // Draw a message with a nice black paint. |
| 74 | paint.setFlags( |
| 75 | SkPaint::kAntiAlias_Flag | |
| 76 | SkPaint::kSubpixelText_Flag | // ... avoid waggly text when rotating. |
| 77 | SkPaint::kUnderlineText_Flag); |
| 78 | paint.setColor(SK_ColorBLACK); |
| 79 | paint.setTextSize(SkIntToScalar(20)); |
| 80 | |
| 81 | canvas->save(); |
| 82 | |
| 83 | static const char message[] = "Hello Skia!!!"; |
| 84 | |
| 85 | // Translate and rotate |
| 86 | canvas->translate(SkIntToScalar(300), SkIntToScalar(300)); |
| 87 | fRotationAngle += SkDoubleToScalar(0.2); |
| 88 | if (fRotationAngle > SkDoubleToScalar(360.0)) { |
| 89 | fRotationAngle -= SkDoubleToScalar(360.0); |
| 90 | } |
| 91 | canvas->rotate(fRotationAngle); |
| 92 | |
| 93 | // Draw the text: |
| 94 | canvas->drawText(message, strlen(message), SkIntToScalar(0), SkIntToScalar(0), paint); |
| 95 | |
| 96 | canvas->restore(); |
| 97 | |
| 98 | // Invalidate the window to force a redraw. Poor man's animation mechanism. |
| 99 | this->inval(NULL); |
| 100 | |
| 101 | INHERITED::draw(canvas); |
| 102 | } |
| 103 | |
| 104 | private: |
| 105 | SkScalar fRotationAngle; |
| 106 | SkColor fBGColor; |
| 107 | typedef BaseExample INHERITED; |
| 108 | }; |
| 109 | |
| 110 | SkOSWindow* create_sk_window(void* hwnd, int argc, char** argv) { |
| 111 | return new HelloSkia(hwnd, argc, argv); |
| 112 | } |
| 113 | |