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WGL: Skip context initialization when window is not set.

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This commit is contained in:
bkaradzic 2013-08-10 21:26:56 -07:00
parent d265b9b0d4
commit e047232292
1 changed files with 147 additions and 131 deletions
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278
src/glcontext_wgl.cpp
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@ -78,147 +78,157 @@ namespace bgfx
wglGetProcAddress = (PFNWGLGETPROCADDRESSPROC)bx::dlsym(m_opengl32dll, "wglGetProcAddress"); wglGetProcAddress = (PFNWGLGETPROCADDRESSPROC)bx::dlsym(m_opengl32dll, "wglGetProcAddress");
BGFX_FATAL(NULL != wglGetProcAddress, Fatal::UnableToInitialize, "Failed get wglGetProcAddress."); BGFX_FATAL(NULL != wglGetProcAddress, Fatal::UnableToInitialize, "Failed get wglGetProcAddress.");
wglMakeCurrent = (PFNWGLMAKECURRENTPROC)bx::dlsym(m_opengl32dll, "wglMakeCurrent"); // If g_bgfxHwnd is NULL, the assumption is that GL context was created
BGFX_FATAL(NULL != wglMakeCurrent, Fatal::UnableToInitialize, "Failed get wglMakeCurrent."); // by user (for example, using SDL, GLFW, etc.)
BX_WARN(NULL != g_bgfxHwnd
wglCreateContext = (PFNWGLCREATECONTEXTPROC)bx::dlsym(m_opengl32dll, "wglCreateContext"); , "bgfx::winSetHwnd with valid window is not called. This might "
BGFX_FATAL(NULL != wglCreateContext, Fatal::UnableToInitialize, "Failed get wglCreateContext."); "be intentional when GL context is created by the user."
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); if (NULL != g_bgfxHwnd)
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); wglMakeCurrent = (PFNWGLMAKECURRENTPROC)bx::dlsym(m_opengl32dll, "wglMakeCurrent");
BX_TRACE("WGL extensions:"); BGFX_FATAL(NULL != wglMakeCurrent, Fatal::UnableToInitialize, "Failed get wglMakeCurrent.");
dumpExtensions(extensions);
}
if (NULL != wglChoosePixelFormatARB wglCreateContext = (PFNWGLCREATECONTEXTPROC)bx::dlsym(m_opengl32dll, "wglCreateContext");
&& NULL != wglCreateContextAttribsARB) BGFX_FATAL(NULL != wglCreateContext, Fatal::UnableToInitialize, "Failed get wglCreateContext.");
{
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; wglDeleteContext = (PFNWGLDELETECONTEXTPROC)bx::dlsym(m_opengl32dll, "wglDeleteContext");
int pixelFormat; BGFX_FATAL(NULL != wglDeleteContext, Fatal::UnableToInitialize, "Failed get wglDeleteContext.");
uint32_t numFormats = 0;
do
{
result = wglChoosePixelFormatARB(m_hdc, attrs, NULL, 1, &pixelFormat, &numFormats);
if (0 == result
|| 0 == numFormats)
{
attrs[3] >>= 1;
attrs[1] = attrs[3] == 0 ? 0 : 1;
}
} while (0 == numFormats); m_hdc = GetDC(g_bgfxHwnd);
BGFX_FATAL(NULL != m_hdc, Fatal::UnableToInitialize, "GetDC failed!");
PIXELFORMATDESCRIPTOR pfd; // Dummy window to peek into WGL functionality.
DescribePixelFormat(m_hdc, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd); //
// An application can only set the pixel format of a window one time.
BX_TRACE("Pixel format:\n" // Once a window's pixel format is set, it cannot be changed.
"\tiPixelType %d\n" // MSDN: http://msdn.microsoft.com/en-us/library/windows/desktop/dd369049%28v=vs.85%29.aspx
"\tcColorBits %d\n" HWND hwnd = CreateWindowA("STATIC"
"\tcAlphaBits %d\n" , ""
"\tcDepthBits %d\n" , WS_POPUP|WS_DISABLED
"\tcStencilBits %d\n" , -32000
, pfd.iPixelType , -32000
, pfd.cColorBits , 0
, pfd.cAlphaBits , 0
, pfd.cDepthBits , NULL
, pfd.cStencilBits , NULL
, GetModuleHandle(NULL)
, 0
); );
result = SetPixelFormat(m_hdc, pixelFormat, &pfd); HDC hdc = GetDC(hwnd);
BGFX_FATAL(0 != result, Fatal::UnableToInitialize, "SetPixelFormat failed (last err: 0x%08x)!", GetLastError() ); BGFX_FATAL(NULL != hdc, Fatal::UnableToInitialize, "GetDC failed!");
uint32_t flags = BGFX_CONFIG_DEBUG ? WGL_CONTEXT_DEBUG_BIT_ARB : 0; HGLRC context = createContext(hdc);
BX_UNUSED(flags);
int32_t contextAttrs[9] = wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
wglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)wglGetProcAddress("wglSwapIntervalEXT");
if (NULL != wglGetExtensionsStringARB)
{ {
#if BGFX_CONFIG_RENDERER_OPENGL >= 31 const char* extensions = (const char*)wglGetExtensionsStringARB(hdc);
WGL_CONTEXT_MAJOR_VERSION_ARB, 3, BX_TRACE("WGL extensions:");
WGL_CONTEXT_MINOR_VERSION_ARB, 1, dumpExtensions(extensions);
WGL_CONTEXT_FLAGS_ARB, flags, }
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
#else if (NULL != wglChoosePixelFormatARB
WGL_CONTEXT_MAJOR_VERSION_ARB, 2, && NULL != wglCreateContextAttribsARB)
WGL_CONTEXT_MINOR_VERSION_ARB, 1, {
0, 0, int32_t attrs[] =
0, 0, {
#endif // BGFX_CONFIG_RENDERER_OPENGL >= 31 WGL_SAMPLE_BUFFERS_ARB, 0,
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;
int pixelFormat;
uint32_t numFormats = 0;
do
{
result = wglChoosePixelFormatARB(m_hdc, attrs, NULL, 1, &pixelFormat, &numFormats);
if (0 == result
|| 0 == numFormats)
{
attrs[3] >>= 1;
attrs[1] = attrs[3] == 0 ? 0 : 1;
}
} while (0 == numFormats);
PIXELFORMATDESCRIPTOR pfd;
DescribePixelFormat(m_hdc, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
BX_TRACE("Pixel format:\n"
"\tiPixelType %d\n"
"\tcColorBits %d\n"
"\tcAlphaBits %d\n"
"\tcDepthBits %d\n"
"\tcStencilBits %d\n"
, pfd.iPixelType
, pfd.cColorBits
, pfd.cAlphaBits
, pfd.cDepthBits
, pfd.cStencilBits
);
result = SetPixelFormat(m_hdc, pixelFormat, &pfd);
BGFX_FATAL(0 != result, Fatal::UnableToInitialize, "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, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 1,
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() );
}
wglMakeCurrent(NULL, NULL);
wglDeleteContext(context);
DestroyWindow(hwnd);
m_context = wglCreateContextAttribsARB(m_hdc, 0, contextAttrs);
if (NULL == m_context) if (NULL == m_context)
{ {
// nVidia doesn't like context profile mask for contexts below 3.2? m_context = createContext(m_hdc);
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() );
}
wglMakeCurrent(NULL, NULL); int result = wglMakeCurrent(m_hdc, m_context);
wglDeleteContext(context); BGFX_FATAL(0 != result, Fatal::UnableToInitialize, "wglMakeCurrent failed!");
DestroyWindow(hwnd);
if (NULL == m_context) if (NULL != wglSwapIntervalEXT)
{ {
m_context = createContext(m_hdc); wglSwapIntervalEXT(0);
} }
int result = wglMakeCurrent(m_hdc, m_context);
BGFX_FATAL(0 != result, Fatal::UnableToInitialize, "wglMakeCurrent failed!");
if (NULL != wglSwapIntervalEXT)
{
wglSwapIntervalEXT(0);
} }
import(); import();
@ -226,13 +236,16 @@ namespace bgfx
void GlContext::destroy() void GlContext::destroy()
{ {
wglMakeCurrent(NULL, NULL); if (NULL != g_bgfxHwnd)
{
wglMakeCurrent(NULL, NULL);
wglDeleteContext(m_context); wglDeleteContext(m_context);
m_context = NULL; m_context = NULL;
ReleaseDC(g_bgfxHwnd, m_hdc); ReleaseDC(g_bgfxHwnd, m_hdc);
m_hdc = NULL; m_hdc = NULL;
}
bx::dlclose(m_opengl32dll); bx::dlclose(m_opengl32dll);
m_opengl32dll = NULL; m_opengl32dll = NULL;
@ -248,8 +261,11 @@ namespace bgfx
void GlContext::swap() void GlContext::swap()
{ {
wglMakeCurrent(m_hdc, m_context); if (NULL != g_bgfxHwnd)
SwapBuffers(m_hdc); {
wglMakeCurrent(m_hdc, m_context);
SwapBuffers(m_hdc);
}
} }
void GlContext::import() void GlContext::import()