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#include <v8.h>
10
11using namespace v8;
12
13#include "SkV8Example.h"
14#include "Global.h"
15#include "JsContext.h"
16#include "Path2D.h"
17
18#include "gl/GrGLUtil.h"
19#include "gl/GrGLDefines.h"
20#include "gl/GrGLInterface.h"
21#include "GrRenderTarget.h"
22#include "GrContext.h"
23#include "SkApplication.h"
24#include "SkCommandLineFlags.h"
25#include "SkData.h"
26#include "SkDraw.h"
27#include "SkGpuDevice.h"
28#include "SkGraphics.h"
29#include "SkScalar.h"
30#include "SkSurface.h"
31
32
33DEFINE_string2(infile, i, NULL, "Name of file to load JS from.\n");
34DEFINE_bool(gpu, true, "Use the GPU for rendering.");
35
36void application_init() {
37    SkGraphics::Init();
38    SkEvent::Init();
39}
40
41void application_term() {
42    SkEvent::Term();
43    SkGraphics::Term();
44}
45
46SkV8ExampleWindow::SkV8ExampleWindow(void* hwnd, JsContext* context)
47    : INHERITED(hwnd)
48    , fJsContext(context)
49#if SK_SUPPORT_GPU
50    , fCurContext(NULL)
51    , fCurIntf(NULL)
52    , fCurRenderTarget(NULL)
53    , fCurSurface(NULL)
54#endif
55{
56    this->setColorType(kBGRA_8888_SkColorType);
57    this->setVisibleP(true);
58    this->setClipToBounds(false);
59
60#if SK_SUPPORT_GPU
61    this->windowSizeChanged();
62#endif
63}
64
65SkV8ExampleWindow::~SkV8ExampleWindow() {
66#if SK_SUPPORT_GPU
67    SkSafeUnref(fCurContext);
68    SkSafeUnref(fCurIntf);
69    SkSafeUnref(fCurRenderTarget);
70    SkSafeUnref(fCurSurface);
71#endif
72}
73
74#if SK_SUPPORT_GPU
75void SkV8ExampleWindow::windowSizeChanged() {
76    if (FLAGS_gpu) {
77        SkOSWindow::AttachmentInfo attachmentInfo;
78        bool result = this->attach(
79                SkOSWindow::kNativeGL_BackEndType, 0, &attachmentInfo);
80        if (!result) {
81            printf("Failed to attach.");
82            exit(1);
83        }
84
85        fCurIntf = GrGLCreateNativeInterface();
86        fCurContext = GrContext::Create(
87                kOpenGL_GrBackend, (GrBackendContext) fCurIntf);
88        if (NULL == fCurIntf || NULL == fCurContext) {
89            printf("Failed to initialize GL.");
90            exit(1);
91        }
92
93        GrBackendRenderTargetDesc desc;
94        desc.fWidth = SkScalarRoundToInt(this->width());
95        desc.fHeight = SkScalarRoundToInt(this->height());
96        desc.fConfig = kSkia8888_GrPixelConfig;
97        desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
98        desc.fSampleCnt = attachmentInfo.fSampleCount;
99        desc.fStencilBits = attachmentInfo.fStencilBits;
100        GrGLint buffer;
101        GR_GL_GetIntegerv(fCurIntf, GR_GL_FRAMEBUFFER_BINDING, &buffer);
102        desc.fRenderTargetHandle = buffer;
103
104        SkSafeUnref(fCurRenderTarget);
105        fCurRenderTarget = fCurContext->wrapBackendRenderTarget(desc);
106        SkSafeUnref(fCurSurface);
107        fCurSurface = SkSurface::NewRenderTargetDirect(fCurRenderTarget);
108    }
109}
110#endif
111
112#if SK_SUPPORT_GPU
113SkCanvas* SkV8ExampleWindow::createCanvas() {
114    if (FLAGS_gpu) {
115        SkCanvas* c = fCurSurface->getCanvas();
116        // Increase the ref count since the surface keeps a reference
117        // to the canvas, but callers of createCanvas put the results
118        // in a SkAutoTUnref.
119        c->ref();
120        return c;
121    } else {
122        return this->INHERITED::createCanvas();
123    }
124}
125#endif
126
127void SkV8ExampleWindow::onSizeChange() {
128    this->INHERITED::onSizeChange();
129
130#if SK_SUPPORT_GPU
131    this->windowSizeChanged();
132#endif
133}
134
135void SkV8ExampleWindow::onDraw(SkCanvas* canvas) {
136
137    canvas->save();
138    canvas->drawColor(SK_ColorWHITE);
139
140    // Now jump into JS and call the onDraw(canvas) method defined there.
141    fJsContext->onDraw(canvas);
142
143    canvas->restore();
144
145    this->INHERITED::onDraw(canvas);
146
147#if SK_SUPPORT_GPU
148    if (FLAGS_gpu) {
149        fCurContext->flush();
150        this->present();
151    }
152#endif
153}
154
155#ifdef SK_BUILD_FOR_WIN
156void SkV8ExampleWindow::onHandleInval(const SkIRect& rect) {
157    RECT winRect;
158    winRect.top = rect.top();
159    winRect.bottom = rect.bottom();
160    winRect.right = rect.right();
161    winRect.left = rect.left();
162    InvalidateRect((HWND)this->getHWND(), &winRect, false);
163}
164#endif
165
166SkOSWindow* create_sk_window(void* hwnd, int argc, char** argv) {
167    printf("Started\n");
168
169    SkCommandLineFlags::Parse(argc, argv);
170
171    // Get the default Isolate created at startup.
172    Isolate* isolate = Isolate::GetCurrent();
173    Global* global = new Global(isolate);
174
175
176    // Set up things to look like a browser by creating
177    // a console object that invokes our print function.
178    const char* startupScript =
179            "function Console() {};                   \n"
180            "Console.prototype.log = function() {     \n"
181            "  var args = Array.prototype.slice.call(arguments).join(' '); \n"
182            "  print(args);                      \n"
183            "};                                       \n"
184            "console = new Console();                 \n";
185
186    if (!global->parseScript(startupScript)) {
187        printf("Failed to parse startup script: %s.\n", FLAGS_infile[0]);
188        exit(1);
189    }
190
191    const char* script =
192            "function onDraw(canvas) {              \n"
193            "    canvas.fillStyle = '#00FF00';      \n"
194            "    canvas.fillRect(20, 20, 100, 100); \n"
195            "    canvas.inval();                    \n"
196            "}                                      \n";
197
198    SkAutoTUnref<SkData> data;
199    if (FLAGS_infile.count()) {
200        data.reset(SkData::NewFromFileName(FLAGS_infile[0]));
201        script = static_cast<const char*>(data->data());
202    }
203    if (NULL == script) {
204        printf("Could not load file: %s.\n", FLAGS_infile[0]);
205        exit(1);
206    }
207    Path2D::AddToGlobal(global);
208
209    if (!global->parseScript(script)) {
210        printf("Failed to parse file: %s.\n", FLAGS_infile[0]);
211        exit(1);
212    }
213
214
215    JsContext* jsContext = new JsContext(global);
216
217    if (!jsContext->initialize()) {
218        printf("Failed to initialize.\n");
219        exit(1);
220    }
221    SkV8ExampleWindow* win = new SkV8ExampleWindow(hwnd, jsContext);
222    global->setWindow(win);
223
224    return win;
225}
226