int gladLoadWGL(HDC hdc) {
if(open_gl()) {
gladLoadWGLLoader((GLADloadproc)get_proc, hdc);
close_gl();
return 1;
}
return 0;
}
int gladLoadWGL(HDC hdc) {
int status = 0;
if(open_gl()) {
status = gladLoadWGLLoader((GLADloadproc)get_proc, hdc);
close_gl();
}
return status;
}
std::unique_ptr<os::OpenGLContext> MFCGraphicsOperations::createOpenGLContext(os::Viewport* port, const os::OpenGLContextAttributes& ctx)
{
auto mfcView = reinterpret_cast<MFCViewport*>(port);
auto temp_ctx = wglCreateContext(mfcView->getHDC());
if (!temp_ctx)
{
mprintf(("Unable to create fake context for OpenGL W32!\n"));
return nullptr;
}
if (!wglMakeCurrent(mfcView->getHDC(), temp_ctx))
{
mprintf(("Unable to make current thread for OpenGL W32!\n"));
if (!wglDeleteContext(temp_ctx))
{
mprintf(("Failed to delete render context!"));
}
return nullptr;
}
if (!gladLoadWGLLoader(gladWGLLoader, mfcView->getHDC()))
{
mprintf(("Failed to load WGL functions!\n"));
wglMakeCurrent(nullptr, nullptr);
if (!wglDeleteContext(temp_ctx))
{
mprintf(("Failed to delete render context!"));
}
return nullptr;
}
if (!GLAD_WGL_ARB_create_context)
{
// No support for 3.x
if (ctx.major_version >= 3)
{
mprintf(("Can't create requested OpenGL context!\n"));
wglMakeCurrent(nullptr, nullptr);
if (!wglDeleteContext(temp_ctx))
{
mprintf(("Failed to delete fake context!"));
}
return nullptr;
}
// Major version is low enough -> just use the fake context
return std::unique_ptr<os::OpenGLContext>(new MFCOpenGLContext(temp_ctx));
}
SCP_vector<int> attrib_list;
attrib_list.push_back(WGL_CONTEXT_MAJOR_VERSION_ARB);
attrib_list.push_back(ctx.major_version);
attrib_list.push_back(WGL_CONTEXT_MINOR_VERSION_ARB);
attrib_list.push_back(ctx.minor_version);
if (GLAD_WGL_ARB_create_context_profile)
{
attrib_list.push_back(WGL_CONTEXT_PROFILE_MASK_ARB);
attrib_list.push_back(ctx.profile == os::OpenGLProfile::Core ?
WGL_CONTEXT_CORE_PROFILE_BIT_ARB : WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB);
}
int flags = 0;
if (ctx.flags[os::OpenGLContextFlags::Debug])
{
flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
}
if (ctx.flags[os::OpenGLContextFlags::ForwardCompatible])
{
flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
}
if (flags != 0)
{
attrib_list.push_back(WGL_CONTEXT_FLAGS_ARB);
attrib_list.push_back(flags);
}
attrib_list.push_back(0);
auto attrib_ctx = wglCreateContextAttribsARB(mfcView->getHDC(), nullptr, attrib_list.data());
// We don't need the fake context anymore
wglMakeCurrent(nullptr, nullptr);
if (!wglDeleteContext(temp_ctx))
{
mprintf(("Failed to delete fakse context!"));
}
if (attrib_ctx == nullptr)
{
mprintf(("Failed to create OpenGL context!\n"));
return nullptr;
}
if (!wglMakeCurrent(mfcView->getHDC(), attrib_ctx))
{
mprintf(("Unable to make current thread for OpenGL W32!\n"));
if (!wglDeleteContext(attrib_ctx))
{
mprintf(("Failed to delete render context!"));
}
return nullptr;
}
if (!gladLoadWGLLoader(gladWGLLoader, mfcView->getHDC()))
{
mprintf(("Failed to load WGL functions!\n"));
wglMakeCurrent(nullptr, nullptr);
if (!wglDeleteContext(temp_ctx))
{
mprintf(("Failed to delete render context!"));
}
return nullptr;
}
return std::unique_ptr<os::OpenGLContext>(new MFCOpenGLContext(attrib_ctx));
}