aboutsummaryrefslogtreecommitdiffhomepage
path: root/tools/gpu/gl/win/CreatePlatformGLTestContext_win.cpp
blob: 5fc355a22a168f6e07f3d6fcda2555d34abb3d06 (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

/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "gl/GLTestContext.h"

#include <windows.h>
#include <GL/GL.h>
#include "win/SkWGL.h"

#include <windows.h>

namespace {

std::function<void()> context_restorer() {
    auto glrc = wglGetCurrentContext();
    auto dc = wglGetCurrentDC();
    return [glrc, dc] { wglMakeCurrent(dc, glrc); };
}

class WinGLTestContext : public sk_gpu_test::GLTestContext {
public:
    WinGLTestContext(GrGLStandard forcedGpuAPI, WinGLTestContext* shareContext);
    ~WinGLTestContext() override;

private:
    void destroyGLContext();

    void onPlatformMakeCurrent() const override;
    std::function<void()> onPlatformGetAutoContextRestore() const override;
    void onPlatformSwapBuffers() const override;
    GrGLFuncPtr onPlatformGetProcAddress(const char* name) const override;

    HWND fWindow;
    HDC fDeviceContext;
    HGLRC fGlRenderContext;
    static ATOM gWC;
    SkWGLPbufferContext* fPbufferContext;
};

ATOM WinGLTestContext::gWC = 0;

WinGLTestContext::WinGLTestContext(GrGLStandard forcedGpuAPI, WinGLTestContext* shareContext)
    : fWindow(nullptr)
    , fDeviceContext(nullptr)
    , fGlRenderContext(0)
    , fPbufferContext(nullptr) {
    HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(nullptr);

    if (!gWC) {
        WNDCLASS wc;
        wc.cbClsExtra = 0;
        wc.cbWndExtra = 0;
        wc.hbrBackground = nullptr;
        wc.hCursor = LoadCursor(nullptr, IDC_ARROW);
        wc.hIcon = LoadIcon(nullptr, IDI_APPLICATION);
        wc.hInstance = hInstance;
        wc.lpfnWndProc = (WNDPROC) DefWindowProc;
        wc.lpszClassName = TEXT("Griffin");
        wc.lpszMenuName = nullptr;
        wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;

        gWC = RegisterClass(&wc);
        if (!gWC) {
            SkDebugf("Could not register window class.\n");
            return;
        }
    }

    if (!(fWindow = CreateWindow(TEXT("Griffin"),
                                 TEXT("The Invisible Man"),
                                 WS_OVERLAPPEDWINDOW,
                                 0, 0, 1, 1,
                                 nullptr, nullptr,
                                 hInstance, nullptr))) {
        SkDebugf("Could not create window.\n");
        return;
    }

    if (!(fDeviceContext = GetDC(fWindow))) {
        SkDebugf("Could not get device context.\n");
        this->destroyGLContext();
        return;
    }
    // Requesting a Core profile would bar us from using NVPR. So we request
    // compatibility profile or GL ES.
    SkWGLContextRequest contextType =
        kGLES_GrGLStandard == forcedGpuAPI ?
        kGLES_SkWGLContextRequest : kGLPreferCompatibilityProfile_SkWGLContextRequest;

    HGLRC winShareContext = nullptr;
    if (shareContext) {
        winShareContext = shareContext->fPbufferContext ? shareContext->fPbufferContext->getGLRC()
                                                        : shareContext->fGlRenderContext;
    }
    fPbufferContext = SkWGLPbufferContext::Create(fDeviceContext, contextType, winShareContext);

    HDC dc;
    HGLRC glrc;
    if (nullptr == fPbufferContext) {
        if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, false, contextType,
                                                    winShareContext))) {
            SkDebugf("Could not create rendering context.\n");
            this->destroyGLContext();
            return;
        }
        dc = fDeviceContext;
        glrc = fGlRenderContext;
    } else {
        ReleaseDC(fWindow, fDeviceContext);
        fDeviceContext = 0;
        DestroyWindow(fWindow);
        fWindow = 0;

        dc = fPbufferContext->getDC();
        glrc = fPbufferContext->getGLRC();
    }

    SkScopeExit restorer(context_restorer());
    if (!(wglMakeCurrent(dc, glrc))) {
        SkDebugf("Could not set the context.\n");
        this->destroyGLContext();
        return;
    }

    sk_sp<const GrGLInterface> gl(GrGLCreateNativeInterface());
    if (nullptr == gl.get()) {
        SkDebugf("Could not create GL interface.\n");
        this->destroyGLContext();
        return;
    }
    if (!gl->validate()) {
        SkDebugf("Could not validate GL interface.\n");
        this->destroyGLContext();
        return;
    }

    this->init(gl.release());
}

WinGLTestContext::~WinGLTestContext() {
    this->teardown();
    this->destroyGLContext();
}

void WinGLTestContext::destroyGLContext() {
    SkSafeSetNull(fPbufferContext);
    if (fGlRenderContext) {
        // This deletes the context immediately even if it is current.
        wglDeleteContext(fGlRenderContext);
        fGlRenderContext = 0;
    }
    if (fWindow && fDeviceContext) {
        ReleaseDC(fWindow, fDeviceContext);
        fDeviceContext = 0;
    }
    if (fWindow) {
        DestroyWindow(fWindow);
        fWindow = 0;
    }
}

void WinGLTestContext::onPlatformMakeCurrent() const {
    HDC dc;
    HGLRC glrc;

    if (nullptr == fPbufferContext) {
        dc = fDeviceContext;
        glrc = fGlRenderContext;
    } else {
        dc = fPbufferContext->getDC();
        glrc = fPbufferContext->getGLRC();
    }

    if (!wglMakeCurrent(dc, glrc)) {
        SkDebugf("Could not create rendering context.\n");
    }
}

std::function<void()> WinGLTestContext::onPlatformGetAutoContextRestore() const {
    if (wglGetCurrentContext() == fGlRenderContext) {
        return nullptr;
    }
    return context_restorer();
}

void WinGLTestContext::onPlatformSwapBuffers() const {
    HDC dc;

    if (nullptr == fPbufferContext) {
        dc = fDeviceContext;
    } else {
        dc = fPbufferContext->getDC();
    }
    if (!SwapBuffers(dc)) {
        SkDebugf("Could not complete SwapBuffers.\n");
    }
}

GrGLFuncPtr WinGLTestContext::onPlatformGetProcAddress(const char* name) const {
    return reinterpret_cast<GrGLFuncPtr>(wglGetProcAddress(name));
}

} // anonymous namespace

namespace sk_gpu_test {
GLTestContext* CreatePlatformGLTestContext(GrGLStandard forcedGpuAPI,
                                           GLTestContext *shareContext) {
    WinGLTestContext* winShareContext = reinterpret_cast<WinGLTestContext*>(shareContext);
    WinGLTestContext *ctx = new WinGLTestContext(forcedGpuAPI, winShareContext);
    if (!ctx->isValid()) {
        delete ctx;
        return nullptr;
    }
    return ctx;
}
}  // namespace sk_gpu_test