status_t
VirtualScreen::SetConfiguration(Desktop& desktop,
ScreenConfigurations& configurations, uint32* _changedScreens)
{
// Remember previous screen modes
typedef std::map<Screen*, display_mode> ScreenModeMap;
ScreenModeMap previousModes;
bool previousModesFailed = false;
if (_changedScreens != NULL) {
*_changedScreens = 0;
try {
for (int32 i = 0; i < fScreenList.CountItems(); i++) {
Screen* screen = fScreenList.ItemAt(i)->screen;
display_mode mode;
screen->GetMode(mode);
previousModes.insert(std::make_pair(screen, mode));
}
} catch (...) {
previousModesFailed = true;
*_changedScreens = ~0L;
}
}
_Reset();
ScreenList list;
status_t status = gScreenManager->AcquireScreens(&desktop, NULL, 0,
desktop.TargetScreen(), false, list);
if (status != B_OK) {
// TODO: we would try again here with force == true
return status;
}
for (int32 i = 0; i < list.CountItems(); i++) {
Screen* screen = list.ItemAt(i);
AddScreen(screen, configurations);
if (!previousModesFailed && _changedScreens != NULL) {
// Figure out which screens have changed their mode
display_mode mode;
screen->GetMode(mode);
ScreenModeMap::const_iterator found = previousModes.find(screen);
if (found != previousModes.end()
&& memcmp(&mode, &found->second, sizeof(display_mode)))
*_changedScreens |= 1 << i;
}
}
UpdateFrame();
return B_OK;
}
void
VirtualScreen::UpdateFrame()
{
int32 virtualWidth = 0, virtualHeight = 0;
for (int32 i = 0; i < fScreenList.CountItems(); i++) {
Screen* screen = fScreenList.ItemAt(i)->screen;
uint16 width, height;
uint32 colorSpace;
float frequency;
screen->GetMode(width, height, colorSpace, frequency);
// TODO: compute virtual size depending on the actual screen position!
virtualWidth += width;
virtualHeight = max_c(virtualHeight, height);
}
fFrame.Set(0, 0, virtualWidth - 1, virtualHeight - 1);
}
