caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 1 | /* |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 2 | * Copyright 2017 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 | */ |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 7 | |
| 8 | #include "HelloWorld.h" |
| 9 | |
bsalomon | f276ac5 | 2015-10-09 13:36:42 -0700 | [diff] [blame] | 10 | #include "GrContext.h" |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 11 | #include "SkCanvas.h" |
Mike Reed | a6d1c0a | 2019-01-03 23:29:38 -0500 | [diff] [blame] | 12 | #include "SkFont.h" |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 13 | #include "SkGradientShader.h" |
| 14 | #include "SkGraphics.h" |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 15 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 16 | using namespace sk_app; |
| 17 | |
| 18 | Application* Application::Create(int argc, char** argv, void* platformData) { |
| 19 | return new HelloWorld(argc, argv, platformData); |
| 20 | } |
| 21 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 22 | HelloWorld::HelloWorld(int argc, char** argv, void* platformData) |
| 23 | : fBackendType(Window::kNativeGL_BackendType) |
| 24 | , fRotationAngle(0) { |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 25 | SkGraphics::Init(); |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 26 | |
| 27 | fWindow = Window::CreateNativeWindow(platformData); |
| 28 | fWindow->setRequestedDisplayParams(DisplayParams()); |
| 29 | |
| 30 | // register callbacks |
Brian Osman | 80fc07e | 2017-12-08 16:45:43 -0500 | [diff] [blame] | 31 | fWindow->pushLayer(this); |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 32 | |
| 33 | fWindow->attach(fBackendType); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 34 | } |
| 35 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 36 | HelloWorld::~HelloWorld() { |
| 37 | fWindow->detach(); |
| 38 | delete fWindow; |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 39 | } |
| 40 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 41 | void HelloWorld::updateTitle() { |
Brian Salomon | bdecacf | 2018-02-02 20:32:49 -0500 | [diff] [blame] | 42 | if (!fWindow || fWindow->sampleCount() <= 1) { |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 43 | return; |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 44 | } |
| 45 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 46 | SkString title("Hello World "); |
| 47 | title.append(Window::kRaster_BackendType == fBackendType ? "Raster" : "OpenGL"); |
| 48 | fWindow->setTitle(title.c_str()); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 49 | } |
| 50 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 51 | void HelloWorld::onBackendCreated() { |
| 52 | this->updateTitle(); |
| 53 | fWindow->show(); |
| 54 | fWindow->inval(); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 55 | } |
| 56 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 57 | void HelloWorld::onPaint(SkCanvas* canvas) { |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 58 | // Clear background |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 59 | canvas->clear(SK_ColorWHITE); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 60 | |
| 61 | SkPaint paint; |
| 62 | paint.setColor(SK_ColorRED); |
| 63 | |
| 64 | // Draw a rectangle with red paint |
reed | c6f28f7 | 2016-03-14 12:22:10 -0700 | [diff] [blame] | 65 | SkRect rect = SkRect::MakeXYWH(10, 10, 128, 128); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 66 | canvas->drawRect(rect, paint); |
| 67 | |
| 68 | // Set up a linear gradient and draw a circle |
| 69 | { |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 70 | SkPoint linearPoints[] = { { 0, 0 }, { 300, 300 } }; |
| 71 | SkColor linearColors[] = { SK_ColorGREEN, SK_ColorBLACK }; |
| 72 | paint.setShader(SkGradientShader::MakeLinear(linearPoints, linearColors, nullptr, 2, |
| 73 | SkShader::kMirror_TileMode)); |
| 74 | paint.setAntiAlias(true); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 75 | |
| 76 | canvas->drawCircle(200, 200, 64, paint); |
| 77 | |
| 78 | // Detach shader |
reed | c6f28f7 | 2016-03-14 12:22:10 -0700 | [diff] [blame] | 79 | paint.setShader(nullptr); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 80 | } |
| 81 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 82 | // Draw a message with a nice black paint |
Mike Reed | a6d1c0a | 2019-01-03 23:29:38 -0500 | [diff] [blame] | 83 | SkFont font; |
| 84 | font.setSubpixel(true); |
| 85 | font.setSize(20); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 86 | paint.setColor(SK_ColorBLACK); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 87 | |
| 88 | canvas->save(); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 89 | static const char message[] = "Hello World"; |
| 90 | |
| 91 | // Translate and rotate |
| 92 | canvas->translate(300, 300); |
| 93 | fRotationAngle += 0.2f; |
| 94 | if (fRotationAngle > 360) { |
| 95 | fRotationAngle -= 360; |
| 96 | } |
| 97 | canvas->rotate(fRotationAngle); |
| 98 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 99 | // Draw the text |
Mike Reed | a6d1c0a | 2019-01-03 23:29:38 -0500 | [diff] [blame] | 100 | canvas->drawSimpleText(message, strlen(message), kUTF8_SkTextEncoding, 0, 0, font, paint); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 101 | |
| 102 | canvas->restore(); |
| 103 | } |
| 104 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 105 | void HelloWorld::onIdle() { |
| 106 | // Just re-paint continously |
| 107 | fWindow->inval(); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 108 | } |
| 109 | |
Brian Osman | eff04b5 | 2017-11-21 13:18:02 -0500 | [diff] [blame] | 110 | bool HelloWorld::onChar(SkUnichar c, uint32_t modifiers) { |
| 111 | if (' ' == c) { |
| 112 | fBackendType = Window::kRaster_BackendType == fBackendType ? Window::kNativeGL_BackendType |
| 113 | : Window::kRaster_BackendType; |
| 114 | fWindow->detach(); |
| 115 | fWindow->attach(fBackendType); |
caryclark | 52edc4d | 2015-02-02 12:55:14 -0800 | [diff] [blame] | 116 | } |
| 117 | return true; |
| 118 | } |