GHOST_TSuccess GHOST_WindowWin32::initMultisample(PIXELFORMATDESCRIPTOR pfd)
{
int pixelFormat;
bool success = FALSE;
UINT numFormats;
HDC hDC = GetDC(getHWND());
float fAttributes[] = {0, 0};
UINT nMaxFormats = 1;
// The attributes to look for
int iAttributes[] = {
WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
WGL_COLOR_BITS_ARB, pfd.cColorBits,
WGL_DEPTH_BITS_ARB, pfd.cDepthBits,
WGL_ALPHA_BITS_ARB, pfd.cAlphaBits,
WGL_STENCIL_BITS_ARB, pfd.cStencilBits,
WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
WGL_SAMPLES_ARB, m_multisample,
0, 0
};
// Get the function
PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
if (!wglChoosePixelFormatARB)
{
m_multisampleEnabled = GHOST_kFailure;
return GHOST_kFailure;
}
// iAttributes[17] is the initial multisample. If not valid try to use the closest valid value under it.
while (iAttributes[17] > 0) {
// See if the format is valid
success = wglChoosePixelFormatARB(hDC, iAttributes, fAttributes, nMaxFormats, &pixelFormat, &numFormats);
GHOST_PRINTF("WGL_SAMPLES_ARB = %i --> success = %i, %i formats\n", iAttributes[17], success, numFormats);
if (success && numFormats >= 1 && m_multisampleEnabled == GHOST_kFailure) {
GHOST_PRINTF("valid pixel format with %i multisamples\n", iAttributes[17]);
m_multisampleEnabled = GHOST_kSuccess;
m_msPixelFormat = pixelFormat;
}
iAttributes[17] -= 1;
success = GHOST_kFailure;
}
if (m_multisampleEnabled == GHOST_kSuccess) {
return GHOST_kSuccess;
}
GHOST_PRINT("no available pixel format\n");
return GHOST_kFailure;
}
void GHOST_NDOFManager::setDeadZone(float dz)
{
if (dz < 0.0f) {
// negative values don't make sense, so clamp at zero
dz = 0.0f;
}
else if (dz > 0.5f) {
// warn the rogue user/developer, but allow it
GHOST_PRINTF("ndof: dead zone of %.2f is rather high...\n", dz);
}
m_deadZone = dz;
GHOST_PRINTF("ndof: dead zone set to %.2f\n", dz);
}
