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GLCtrl: Support of minimal GL in windows (thanks Tom1)

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git-svn-id: svn://ultimatepp.org/upp/trunk@13564 f0d560ea-af0d-0410-9eb7-867de7ffcac7
This commit is contained in:
cxl 2019-08-30 16:18:29 +00:00
parent 5e7a84b5d6
commit cf4a5b030d
1 changed files with 11 additions and 5 deletions
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16
uppsrc/GLCtrl/Win32GLCtrl.cpp
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@ -28,7 +28,7 @@ void MakeWGLContext(int depthBits, int stencilBits, int samples)
if(pass == 0) {
s_pfd.nSize = sizeof(s_pfd);
s_pfd.nVersion = 1;
s_pfd.dwFlags = PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_GENERIC_ACCELERATED|PFD_GENERIC_FORMAT;
s_pfd.dwFlags = PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_GENERIC_ACCELERATED|PFD_GENERIC_FORMAT|PFD_DOUBLEBUFFER_DONTCARE;
s_pfd.iPixelType = PFD_TYPE_RGBA;
s_pfd.cColorBits = 32;
s_pfd.cAlphaBits = 8;
@ -65,18 +65,24 @@ void MakeWGLContext(int depthBits, int stencilBits, int samples)
if(!SetPixelFormat(hDC, s_pixelFormatID, &s_pfd))
return;
s_openGLContext = wglCreateContext(hDC);
bool enhanced_mode=false;
if(pass == 0) {
HGLRC hRC = wglCreateContext(hDC);
wglMakeCurrent(hDC, hRC);
wglMakeCurrent(hDC, s_openGLContext);
glewInit();
if (glewIsSupported("GL_VERSION_2_1")) enhanced_mode=true;
wglMakeCurrent(NULL, NULL);
wglDeleteContext(hRC);
}
else
s_openGLContext = wglCreateContext(hDC);
ReleaseDC(hWND, hDC);
DestroyWindow(hWND);
if(!enhanced_mode) break; // In basic mode, this is it.
}
}
}