void OpenGLGraphicsManager::setActualScreenSize(uint width, uint height) {
_outputScreenWidth = width;
_outputScreenHeight = height;
// Setup backbuffer size.
_backBuffer.setDimensions(width, height);
uint overlayWidth = width;
uint overlayHeight = height;
// WORKAROUND: We can only support surfaces up to the maximum supported
// texture size. Thus, in case we encounter a physical size bigger than
// this maximum texture size we will simply use an overlay as big as
// possible and then scale it to the physical display size. This sounds
// bad but actually all recent chips should support full HD resolution
// anyway. Thus, it should not be a real issue for modern hardware.
if ( overlayWidth > (uint)g_context.maxTextureSize
|| overlayHeight > (uint)g_context.maxTextureSize) {
const frac_t outputAspect = intToFrac(_outputScreenWidth) / _outputScreenHeight;
if (outputAspect > (frac_t)FRAC_ONE) {
overlayWidth = g_context.maxTextureSize;
overlayHeight = intToFrac(overlayWidth) / outputAspect;
} else {
overlayHeight = g_context.maxTextureSize;
overlayWidth = fracToInt(overlayHeight * outputAspect);
}
}
// HACK: We limit the minimal overlay size to 256x200, which is the
// minimum of the dimensions of the two resolutions 256x240 (NES) and
// 320x200 (many DOS games use this). This hopefully assure that our
// GUI has working layouts.
overlayWidth = MAX<uint>(overlayWidth, 256);
overlayHeight = MAX<uint>(overlayHeight, 200);
if (!_overlay || _overlay->getFormat() != _defaultFormatAlpha) {
delete _overlay;
_overlay = nullptr;
_overlay = createSurface(_defaultFormatAlpha);
assert(_overlay);
// We always filter the overlay with GL_LINEAR. This assures it's
// readable in case it needs to be scaled and does not affect it
// otherwise.
_overlay->enableLinearFiltering(true);
}
_overlay->allocate(overlayWidth, overlayHeight);
_overlay->fill(0);
// Re-setup the scaling for the screen and cursor
recalculateDisplayArea();
recalculateCursorScaling();
// Something changed, so update the screen change ID.
++_screenChangeID;
}
void OpenGLGraphicsManager::setActualScreenSize(uint width, uint height) {
_outputScreenWidth = width;
_outputScreenHeight = height;
// Setup coordinates system.
GLCALL(glViewport(0, 0, _outputScreenWidth, _outputScreenHeight));
GLCALL(glMatrixMode(GL_PROJECTION));
GLCALL(glLoadIdentity());
#ifdef USE_GLES
GLCALL(glOrthof(0, _outputScreenWidth, _outputScreenHeight, 0, -1, 1));
#else
GLCALL(glOrtho(0, _outputScreenWidth, _outputScreenHeight, 0, -1, 1));
#endif
GLCALL(glMatrixMode(GL_MODELVIEW));
GLCALL(glLoadIdentity());
uint overlayWidth = width;
uint overlayHeight = height;
// WORKAROUND: We can only support surfaces up to the maximum supported
// texture size. Thus, in case we encounter a physical size bigger than
// this maximum texture size we will simply use an overlay as big as
// possible and then scale it to the physical display size. This sounds
// bad but actually all recent chips should support full HD resolution
// anyway. Thus, it should not be a real issue for modern hardware.
if ( overlayWidth > (uint)Texture::getMaximumTextureSize()
|| overlayHeight > (uint)Texture::getMaximumTextureSize()) {
const frac_t outputAspect = intToFrac(_outputScreenWidth) / _outputScreenHeight;
if (outputAspect > (frac_t)FRAC_ONE) {
overlayWidth = Texture::getMaximumTextureSize();
overlayHeight = intToFrac(overlayWidth) / outputAspect;
} else {
overlayHeight = Texture::getMaximumTextureSize();
overlayWidth = fracToInt(overlayHeight * outputAspect);
}
}
// HACK: We limit the minimal overlay size to 256x200, which is the
// minimum of the dimensions of the two resolutions 256x240 (NES) and
// 320x200 (many DOS games use this). This hopefully assure that our
// GUI has working layouts.
overlayWidth = MAX<uint>(overlayWidth, 256);
overlayHeight = MAX<uint>(overlayHeight, 200);
if (!_overlay || _overlay->getFormat() != _defaultFormatAlpha) {
delete _overlay;
_overlay = nullptr;
_overlay = createTexture(_defaultFormatAlpha);
assert(_overlay);
// We always filter the overlay with GL_LINEAR. This assures it's
// readable in case it needs to be scaled and does not affect it
// otherwise.
_overlay->enableLinearFiltering(true);
}
_overlay->allocate(overlayWidth, overlayHeight);
_overlay->fill(0);
#ifdef USE_OSD
if (!_osd || _osd->getFormat() != _defaultFormatAlpha) {
delete _osd;
_osd = nullptr;
_osd = createTexture(_defaultFormatAlpha);
assert(_osd);
// We always filter the osd with GL_LINEAR. This assures it's
// readable in case it needs to be scaled and does not affect it
// otherwise.
_osd->enableLinearFiltering(true);
}
_osd->allocate(_overlay->getWidth(), _overlay->getHeight());
_osd->fill(0);
#endif
// Re-setup the scaling for the screen and cursor
recalculateDisplayArea();
recalculateCursorScaling();
// Something changed, so update the screen change ID.
++_screenChangeID;
}
OSystem::TransactionError OpenGLGraphicsManager::endGFXTransaction() {
assert(_transactionMode == kTransactionActive);
uint transactionError = OSystem::kTransactionSuccess;
bool setupNewGameScreen = false;
if ( _oldState.gameWidth != _currentState.gameWidth
|| _oldState.gameHeight != _currentState.gameHeight) {
setupNewGameScreen = true;
}
#ifdef USE_RGB_COLOR
if (_oldState.gameFormat != _currentState.gameFormat) {
setupNewGameScreen = true;
}
// Check whether the requested format can actually be used.
Common::List<Graphics::PixelFormat> supportedFormats = getSupportedFormats();
// In case the requested format is not usable we will fall back to CLUT8.
if (Common::find(supportedFormats.begin(), supportedFormats.end(), _currentState.gameFormat) == supportedFormats.end()) {
_currentState.gameFormat = Graphics::PixelFormat::createFormatCLUT8();
transactionError |= OSystem::kTransactionFormatNotSupported;
}
#endif
do {
uint requestedWidth = _currentState.gameWidth;
uint requestedHeight = _currentState.gameHeight;
const uint desiredAspect = getDesiredGameScreenAspect();
requestedHeight = intToFrac(requestedWidth) / desiredAspect;
if (!loadVideoMode(requestedWidth, requestedHeight,
#ifdef USE_RGB_COLOR
_currentState.gameFormat
#else
Graphics::PixelFormat::createFormatCLUT8()
#endif
)
// HACK: This is really nasty but we don't have any guarantees of
// a context existing before, which means we don't know the maximum
// supported texture size before this. Thus, we check whether the
// requested game resolution is supported over here.
|| ( _currentState.gameWidth > (uint)Texture::getMaximumTextureSize()
|| _currentState.gameHeight > (uint)Texture::getMaximumTextureSize())) {
if (_transactionMode == kTransactionActive) {
// Try to setup the old state in case its valid and is
// actually different from the new one.
if (_oldState.valid && _oldState != _currentState) {
// Give some hints on what failed to set up.
if ( _oldState.gameWidth != _currentState.gameWidth
|| _oldState.gameHeight != _currentState.gameHeight) {
transactionError |= OSystem::kTransactionSizeChangeFailed;
}
#ifdef USE_RGB_COLOR
if (_oldState.gameFormat != _currentState.gameFormat) {
transactionError |= OSystem::kTransactionFormatNotSupported;
}
#endif
if (_oldState.aspectRatioCorrection != _currentState.aspectRatioCorrection) {
transactionError |= OSystem::kTransactionAspectRatioFailed;
}
if (_oldState.graphicsMode != _currentState.graphicsMode) {
transactionError |= OSystem::kTransactionModeSwitchFailed;
}
// Roll back to the old state.
_currentState = _oldState;
_transactionMode = kTransactionRollback;
// Try to set up the old state.
continue;
}
}
// DON'T use error(), as this tries to bring up the debug
// console, which WON'T WORK now that we might no have a
// proper screen.
warning("OpenGLGraphicsManager::endGFXTransaction: Could not load any graphics mode!");
g_system->quit();
}
// In case we reach this we have a valid state, yay.
_transactionMode = kTransactionNone;
_currentState.valid = true;
} while (_transactionMode == kTransactionRollback);
if (setupNewGameScreen) {
delete _gameScreen;
_gameScreen = nullptr;
#ifdef USE_RGB_COLOR
_gameScreen = createTexture(_currentState.gameFormat);
#else
_gameScreen = createTexture(Graphics::PixelFormat::createFormatCLUT8());
#endif
assert(_gameScreen);
if (_gameScreen->hasPalette()) {
_gameScreen->setPalette(0, 256, _gamePalette);
}
_gameScreen->allocate(_currentState.gameWidth, _currentState.gameHeight);
_gameScreen->enableLinearFiltering(_currentState.graphicsMode == GFX_LINEAR);
// We fill the screen to all black or index 0 for CLUT8.
if (_currentState.gameFormat.bytesPerPixel == 1) {
_gameScreen->fill(0);
} else {
_gameScreen->fill(_gameScreen->getSurface()->format.RGBToColor(0, 0, 0));
}
}
// Update our display area and cursor scaling. This makes sure we pick up
// aspect ratio correction and game screen changes correctly.
recalculateDisplayArea();
recalculateCursorScaling();
// Something changed, so update the screen change ID.
++_screenChangeID;
// Since transactionError is a ORd list of TransactionErrors this is
// clearly wrong. But our API is simply broken.
return (OSystem::TransactionError)transactionError;
}