aboutsummaryrefslogtreecommitdiffhomepage
path: root/experimental/SkV8Example/SkV8Example.cpp
blob: 03a8826c88122a325d837708d32700785f6bf07a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
/*
 * Copyright 2013 Google Inc.
 *
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 *
 */
#include <v8.h>
#include <include/libplatform/libplatform.h>

#include "SkV8Example.h"
#include "Global.h"
#include "JsContext.h"
#include "Path2D.h"
#include "Path2DBuilder.h"

#include "gl/GrGLUtil.h"
#include "gl/GrGLDefines.h"
#include "gl/GrGLInterface.h"
#include "GrRenderTarget.h"
#include "GrContext.h"
#include "SkApplication.h"
#include "SkCommandLineFlags.h"
#include "SkData.h"
#include "SkDraw.h"
#include "SkGpuDevice.h"
#include "SkGraphics.h"
#include "SkScalar.h"
#include "SkSurface.h"


DEFINE_string2(infile, i, NULL, "Name of file to load JS from.\n");
DEFINE_bool(gpu, true, "Use the GPU for rendering.");

void application_init() {
    SkGraphics::Init();
    SkEvent::Init();
}

void application_term() {
    SkEvent::Term();
}

SkV8ExampleWindow::SkV8ExampleWindow(void* hwnd, JsContext* context)
    : INHERITED(hwnd)
    , fJsContext(context)
#if SK_SUPPORT_GPU
    , fCurContext(NULL)
    , fCurIntf(NULL)
    , fCurRenderTarget(NULL)
    , fCurSurface(NULL)
#endif
{
    this->setColorType(kBGRA_8888_SkColorType);
    this->setVisibleP(true);
    this->setClipToBounds(false);

#if SK_SUPPORT_GPU
    this->windowSizeChanged();
#endif
}

SkV8ExampleWindow::~SkV8ExampleWindow() {
#if SK_SUPPORT_GPU
    SkSafeUnref(fCurContext);
    SkSafeUnref(fCurIntf);
    SkSafeUnref(fCurRenderTarget);
    SkSafeUnref(fCurSurface);
#endif
}

#if SK_SUPPORT_GPU
void SkV8ExampleWindow::windowSizeChanged() {
    if (FLAGS_gpu) {
        SkOSWindow::AttachmentInfo attachmentInfo;
        bool result = this->attach(
                SkOSWindow::kNativeGL_BackEndType, 0, &attachmentInfo);
        if (!result) {
            printf("Failed to attach.");
            exit(1);
        }

        fCurIntf = GrGLCreateNativeInterface();
        fCurContext = GrContext::Create(
                kOpenGL_GrBackend, (GrBackendContext) fCurIntf);
        if (NULL == fCurIntf || NULL == fCurContext) {
            printf("Failed to initialize GL.");
            exit(1);
        }

        GrBackendRenderTargetDesc desc;
        desc.fWidth = SkScalarRoundToInt(this->width());
        desc.fHeight = SkScalarRoundToInt(this->height());
        desc.fConfig = kSkia8888_GrPixelConfig;
        desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
        desc.fSampleCnt = attachmentInfo.fSampleCount;
        desc.fStencilBits = attachmentInfo.fStencilBits;
        GrGLint buffer;
        GR_GL_GetIntegerv(fCurIntf, GR_GL_FRAMEBUFFER_BINDING, &buffer);
        desc.fRenderTargetHandle = buffer;

        SkSafeUnref(fCurRenderTarget);
        fCurRenderTarget = fCurContext->wrapBackendRenderTarget(desc);
        SkSafeUnref(fCurSurface);
        fCurSurface = SkSurface::NewRenderTargetDirect(fCurRenderTarget);
    }
}
#endif

#if SK_SUPPORT_GPU
SkSurface* SkV8ExampleWindow::createSurface() {
    if (FLAGS_gpu) {
        // Increase the ref count since callers of createSurface put the
        // results in a SkAutoTUnref.
        fCurSurface->ref();
        return fCurSurface;
    } else {
        return this->INHERITED::createSurface();
    }
}
#endif

void SkV8ExampleWindow::onSizeChange() {
    this->INHERITED::onSizeChange();

#if SK_SUPPORT_GPU
    this->windowSizeChanged();
#endif
}

Global* global = NULL;

void SkV8ExampleWindow::onDraw(SkCanvas* canvas) {

    canvas->save();
    canvas->drawColor(SK_ColorWHITE);

    // Now jump into JS and call the onDraw(canvas) method defined there.
    fJsContext->onDraw(canvas);

    canvas->restore();

    this->INHERITED::onDraw(canvas);

#if SK_SUPPORT_GPU
    if (FLAGS_gpu) {
        fCurContext->flush();
        this->present();
    }
#endif
}

#ifdef SK_BUILD_FOR_WIN
void SkV8ExampleWindow::onHandleInval(const SkIRect& rect) {
    RECT winRect;
    winRect.top = rect.top();
    winRect.bottom = rect.bottom();
    winRect.right = rect.right();
    winRect.left = rect.left();
    InvalidateRect((HWND)this->getHWND(), &winRect, false);
}
#endif


SkOSWindow* create_sk_window(void* hwnd, int argc, char** argv) {
    printf("Started\n");

    v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
    SkCommandLineFlags::Parse(argc, argv);

    v8::V8::InitializeICU();
    v8::Platform* platform = v8::platform::CreateDefaultPlatform();
    v8::V8::InitializePlatform(platform);
    v8::V8::Initialize();

    v8::Isolate* isolate = v8::Isolate::New();
    v8::Isolate::Scope isolate_scope(isolate);
    v8::HandleScope handle_scope(isolate);
    isolate->Enter();

    global = new Global(isolate);


    // Set up things to look like a browser by creating
    // a console object that invokes our print function.
    const char* startupScript =
            "function Console() {};                   \n"
            "Console.prototype.log = function() {     \n"
            "  var args = Array.prototype.slice.call(arguments).join(' '); \n"
            "  print(args);                      \n"
            "};                                       \n"
            "console = new Console();                 \n";

    if (!global->parseScript(startupScript)) {
        printf("Failed to parse startup script: %s.\n", FLAGS_infile[0]);
        exit(1);
    }

    const char* script =
            "function onDraw(canvas) {              \n"
            "    canvas.fillStyle = '#00FF00';      \n"
            "    canvas.fillRect(20, 20, 100, 100); \n"
            "    canvas.inval();                    \n"
            "}                                      \n";

    SkAutoTUnref<SkData> data;
    if (FLAGS_infile.count()) {
        data.reset(SkData::NewFromFileName(FLAGS_infile[0]));
        script = static_cast<const char*>(data->data());
    }
    if (NULL == script) {
        printf("Could not load file: %s.\n", FLAGS_infile[0]);
        exit(1);
    }
    Path2DBuilder::AddToGlobal(global);
    Path2D::AddToGlobal(global);

    if (!global->parseScript(script)) {
        printf("Failed to parse file: %s.\n", FLAGS_infile[0]);
        exit(1);
    }


    JsContext* jsContext = new JsContext(global);

    if (!jsContext->initialize()) {
        printf("Failed to initialize.\n");
        exit(1);
    }
    SkV8ExampleWindow* win = new SkV8ExampleWindow(hwnd, jsContext);
    global->setWindow(win);

    return win;
}