void GlContext::create(uint32_t /*_width*/, uint32_t /*_height*/)
{
m_opengl32dll = bx::dlopen("opengl32.dll");
BGFX_FATAL(NULL != m_opengl32dll, Fatal::UnableToInitialize, "Failed to load opengl32.dll.");
wglGetProcAddress = (PFNWGLGETPROCADDRESSPROC)bx::dlsym(m_opengl32dll, "wglGetProcAddress");
BGFX_FATAL(NULL != wglGetProcAddress, Fatal::UnableToInitialize, "Failed get wglGetProcAddress.");
// If g_bgfxHwnd is NULL, the assumption is that GL context was created
// by user (for example, using SDL, GLFW, etc.)
BX_WARN(NULL != g_bgfxHwnd
, "bgfx::winSetHwnd with valid window is not called. This might "
"be intentional when GL context is created by the user."
);
if (NULL != g_bgfxHwnd)
{
wglMakeCurrent = (PFNWGLMAKECURRENTPROC)bx::dlsym(m_opengl32dll, "wglMakeCurrent");
BGFX_FATAL(NULL != wglMakeCurrent, Fatal::UnableToInitialize, "Failed get wglMakeCurrent.");
wglCreateContext = (PFNWGLCREATECONTEXTPROC)bx::dlsym(m_opengl32dll, "wglCreateContext");
BGFX_FATAL(NULL != wglCreateContext, Fatal::UnableToInitialize, "Failed get wglCreateContext.");
wglDeleteContext = (PFNWGLDELETECONTEXTPROC)bx::dlsym(m_opengl32dll, "wglDeleteContext");
BGFX_FATAL(NULL != wglDeleteContext, Fatal::UnableToInitialize, "Failed get wglDeleteContext.");
m_hdc = GetDC(g_bgfxHwnd);
BGFX_FATAL(NULL != m_hdc, Fatal::UnableToInitialize, "GetDC failed!");
// Dummy window to peek into WGL functionality.
//
// An application can only set the pixel format of a window one time.
// Once a window's pixel format is set, it cannot be changed.
// MSDN: http://msdn.microsoft.com/en-us/library/windows/desktop/dd369049%28v=vs.85%29.aspx
HWND hwnd = CreateWindowA("STATIC"
, ""
, WS_POPUP|WS_DISABLED
, -32000
, -32000
, 0
, 0
, NULL
, NULL
, GetModuleHandle(NULL)
, 0
);
HDC hdc = GetDC(hwnd);
BGFX_FATAL(NULL != hdc, Fatal::UnableToInitialize, "GetDC failed!");
HGLRC context = createContext(hdc);
wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
wglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)wglGetProcAddress("wglSwapIntervalEXT");
if (NULL != wglGetExtensionsStringARB)
{
const char* extensions = (const char*)wglGetExtensionsStringARB(hdc);
BX_TRACE("WGL extensions:");
dumpExtensions(extensions);
}
if (NULL != wglChoosePixelFormatARB
&& NULL != wglCreateContextAttribsARB)
{
int32_t attrs[] =
{
WGL_SAMPLE_BUFFERS_ARB, 0,
WGL_SAMPLES_ARB, 0,
WGL_SUPPORT_OPENGL_ARB, true,
WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB,
WGL_DRAW_TO_WINDOW_ARB, true,
WGL_DOUBLE_BUFFER_ARB, true,
WGL_COLOR_BITS_ARB, 32,
WGL_DEPTH_BITS_ARB, 24,
WGL_STENCIL_BITS_ARB, 8,
0
};
int result;
uint32_t numFormats = 0;
do
{
result = wglChoosePixelFormatARB(m_hdc, attrs, NULL, 1, &m_pixelFormat, &numFormats);
if (0 == result
|| 0 == numFormats)
{
attrs[3] >>= 1;
attrs[1] = attrs[3] == 0 ? 0 : 1;
}
} while (0 == numFormats);
DescribePixelFormat(m_hdc, m_pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &m_pfd);
BX_TRACE("Pixel format:\n"
"\tiPixelType %d\n"
"\tcColorBits %d\n"
"\tcAlphaBits %d\n"
"\tcDepthBits %d\n"
"\tcStencilBits %d\n"
, m_pfd.iPixelType
, m_pfd.cColorBits
, m_pfd.cAlphaBits
, m_pfd.cDepthBits
, m_pfd.cStencilBits
);
result = SetPixelFormat(m_hdc, m_pixelFormat, &m_pfd);
// When window is created by SDL and SDL_WINDOW_OPENGL is set SetPixelFormat
// will fail. Just warn and continue. In case it failed for some other reason
// create context will fail and it will error out there.
BX_WARN(result, "SetPixelFormat failed (last err: 0x%08x)!", GetLastError() );
uint32_t flags = BGFX_CONFIG_DEBUG ? WGL_CONTEXT_DEBUG_BIT_ARB : 0;
BX_UNUSED(flags);
int32_t contextAttrs[9] =
{
#if BGFX_CONFIG_RENDERER_OPENGL >= 31
WGL_CONTEXT_MAJOR_VERSION_ARB, BGFX_CONFIG_RENDERER_OPENGL / 10,
WGL_CONTEXT_MINOR_VERSION_ARB, BGFX_CONFIG_RENDERER_OPENGL % 10,
WGL_CONTEXT_FLAGS_ARB, flags,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
#else
WGL_CONTEXT_MAJOR_VERSION_ARB, 2,
WGL_CONTEXT_MINOR_VERSION_ARB, 1,
0, 0,
0, 0,
#endif // BGFX_CONFIG_RENDERER_OPENGL >= 31
0
};
m_context = wglCreateContextAttribsARB(m_hdc, 0, contextAttrs);
if (NULL == m_context)
{
// nVidia doesn't like context profile mask for contexts below 3.2?
contextAttrs[6] = WGL_CONTEXT_PROFILE_MASK_ARB == contextAttrs[6] ? 0 : contextAttrs[6];
m_context = wglCreateContextAttribsARB(m_hdc, 0, contextAttrs);
}
BGFX_FATAL(NULL != m_context, Fatal::UnableToInitialize, "Failed to create context 0x%08x.", GetLastError() );
BX_STATIC_ASSERT(sizeof(contextAttrs) == sizeof(m_contextAttrs) );
memcpy(m_contextAttrs, contextAttrs, sizeof(contextAttrs) );
}
void VRImplOVR::connect(VRDesc* _desc)
{
ovrGraphicsLuid luid;
ovrResult result = ovr_Create(&m_session, &luid);
if (!OVR_SUCCESS(result))
{
BX_TRACE("Failed to create OVR device.");
return;
}
BX_STATIC_ASSERT(sizeof(_desc->m_adapterLuid) >= sizeof(luid));
memcpy(&_desc->m_adapterLuid, &luid, sizeof(luid));
ovrHmdDesc hmdDesc = ovr_GetHmdDesc(m_session);
_desc->m_deviceType = hmdDesc.Type;
_desc->m_refreshRate = hmdDesc.DisplayRefreshRate;
_desc->m_deviceSize.m_w = hmdDesc.Resolution.w;
_desc->m_deviceSize.m_h = hmdDesc.Resolution.h;
BX_TRACE("OVR HMD: %s, %s, firmware: %d.%d"
, hmdDesc.ProductName
, hmdDesc.Manufacturer
, hmdDesc.FirmwareMajor
, hmdDesc.FirmwareMinor
);
ovrSizei eyeSize[2] =
{
ovr_GetFovTextureSize(m_session, ovrEye_Left, hmdDesc.DefaultEyeFov[0], 1.0f),
ovr_GetFovTextureSize(m_session, ovrEye_Right, hmdDesc.DefaultEyeFov[0], 1.0f),
};
for (int eye = 0; eye < 2; ++eye)
{
BX_STATIC_ASSERT(sizeof(_desc->m_eyeFov[eye]) == sizeof(hmdDesc.DefaultEyeFov[eye]));
memcpy(&_desc->m_eyeFov[eye], &hmdDesc.DefaultEyeFov[eye], sizeof(_desc->m_eyeFov[eye]));
_desc->m_eyeSize[eye].m_w = eyeSize[eye].w;
_desc->m_eyeSize[eye].m_h = eyeSize[eye].h;
}
float neckOffset[2] = {OVR_DEFAULT_NECK_TO_EYE_HORIZONTAL, OVR_DEFAULT_NECK_TO_EYE_VERTICAL};
ovr_GetFloatArray(m_session, OVR_KEY_NECK_TO_EYE_DISTANCE, neckOffset, 2);
_desc->m_neckOffset[0] = neckOffset[0];
_desc->m_neckOffset[1] = neckOffset[1];
// build constant layer settings
m_renderLayer.Header.Type = ovrLayerType_EyeFov;
m_renderLayer.Header.Flags = 0;
for (int eye = 0; eye < 2; ++eye)
{
m_renderLayer.Fov[eye] = hmdDesc.DefaultEyeFov[eye];
m_renderLayer.Viewport[eye].Pos.x = 0;
m_renderLayer.Viewport[eye].Pos.y = 0;
m_renderLayer.Viewport[eye].Size = eyeSize[eye];
}
m_viewScale.HmdSpaceToWorldScaleInMeters = 1.0f;
for (int eye = 0; eye < 2; ++eye)
{
ovrEyeRenderDesc erd = ovr_GetRenderDesc(m_session, static_cast<ovrEyeType>(eye), hmdDesc.DefaultEyeFov[eye]);
m_viewScale.HmdToEyeOffset[eye] = erd.HmdToEyeOffset;
m_eyeFov[eye] = erd.Fov;
m_pixelsPerTanAngleAtCenter[eye] = erd.PixelsPerTanAngleAtCenter;
}
}
