/**
* Sets up all the internal display flags depending on
* the current video settings.
*/
void Screen::makeVideoFlags()
{
_flags = SDL_HWSURFACE|SDL_DOUBLEBUF|SDL_HWPALETTE;
if (Options::asyncBlit)
{
_flags |= SDL_ASYNCBLIT;
}
if (isOpenGLEnabled())
{
_flags = SDL_OPENGL;
SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 );
SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
}
if (Options::allowResize)
{
_flags |= SDL_RESIZABLE;
}
// Handle window positioning
if (Options::windowedModePositionX != -1 || Options::windowedModePositionY != -1)
{
std::ostringstream ss;
ss << "SDL_VIDEO_WINDOW_POS=" << std::dec << Options::windowedModePositionX << "," << Options::windowedModePositionY;
SDL_putenv(const_cast<char*>(ss.str().c_str()));
SDL_putenv(const_cast<char*>("SDL_VIDEO_CENTERED="));
}
else if (Options::borderless)
{
SDL_putenv(const_cast<char*>("SDL_VIDEO_WINDOW_POS="));
SDL_putenv(const_cast<char*>("SDL_VIDEO_CENTERED=center"));
}
else
{
SDL_putenv(const_cast<char*>("SDL_VIDEO_WINDOW_POS="));
SDL_putenv(const_cast<char*>("SDL_VIDEO_CENTERED="));
}
// Handle display mode
if (Options::fullscreen)
{
_flags |= SDL_FULLSCREEN;
}
if (Options::borderless)
{
_flags |= SDL_NOFRAME;
SDL_putenv(const_cast<char*>("SDL_VIDEO_CENTERED=center"));
}
else
{
SDL_putenv(const_cast<char*>("SDL_VIDEO_CENTERED="));
}
_bpp = (is32bitEnabled() || isOpenGLEnabled()) ? 32 : 8;
_baseWidth = Options::baseXResolution;
_baseHeight = Options::baseYResolution;
}
/**
* Saves a screenshot of the screen's contents.
* @param filename Filename of the PNG file.
*/
void Screen::screenshot(const std::string &filename) const
{
SDL_Surface *screenshot = SDL_AllocSurface(0, getWidth() - getWidth()%4, getHeight(), 24, 0xff, 0xff00, 0xff0000, 0);
if (isOpenGLEnabled())
{
#ifndef __NO_OPENGL
GLenum format = GL_RGB;
for (int y = 0; y < getHeight(); ++y)
{
glReadPixels(0, getHeight()-(y+1), getWidth() - getWidth()%4, 1, format, GL_UNSIGNED_BYTE, ((Uint8*)screenshot->pixels) + y*screenshot->pitch);
}
glErrorCheck();
#endif
}
else
{
SDL_BlitSurface(_screen, 0, screenshot, 0);
}
unsigned error = lodepng::encode(filename, (const unsigned char *)(screenshot->pixels), getWidth() - getWidth()%4, getHeight(), LCT_RGB);
if (error)
{
Log(LOG_ERROR) << "Saving to PNG failed: " << lodepng_error_text(error);
}
SDL_FreeSurface(screenshot);
}
/**
* Renders the buffer's contents onto the screen, applying
* any necessary filters or conversions in the process.
* If the scaling factor is bigger than 1, the entire contents
* of the buffer are resized by that factor (eg. 2 = doubled)
* before being put on screen.
*/
void Screen::flip()
{
if (getWidth() != _baseWidth || getHeight() != _baseHeight || isOpenGLEnabled())
{
Zoom::flipWithZoom(_surface->getSurface(), _screen, _topBlackBand, _bottomBlackBand, _leftBlackBand, _rightBlackBand, &glOutput);
}
else
{
SDL_BlitSurface(_surface->getSurface(), 0, _screen, 0);
}
// perform any requested palette update
if (_pushPalette && _numColors && _screen->format->BitsPerPixel == 8)
{
if (_screen->format->BitsPerPixel == 8 && SDL_SetColors(_screen, &(deferredPalette[_firstColor]), _firstColor, _numColors) == 0)
{
Log(LOG_DEBUG) << "Display palette doesn't match requested palette";
}
_numColors = 0;
_pushPalette = false;
}
if (SDL_Flip(_screen) == -1)
{
throw Exception(SDL_GetError());
}
}
/// Sets the _flags and _bpp variables based on game options; needed in more than one place now
void Screen::makeVideoFlags()
{
_flags = SDL_SWSURFACE|SDL_HWPALETTE;
if (Options::getBool("asyncBlit")) _flags |= SDL_ASYNCBLIT;
if (isOpenGLEnabled()) _flags = SDL_OPENGL;
if (Options::getBool("allowResize")) _flags |= SDL_RESIZABLE;
if (_fullscreen)
{
_flags |= SDL_FULLSCREEN;
}
_bpp = (Screen::isHQXEnabled() || Screen::isOpenGLEnabled()) ? 32 : 8;
}
/**
* Changes the screen's resolution. The display surface
* and palette have to be reset for this to happen properly.
* @param width Width in pixels.
* @param height Height in pixels.
*/
void Screen::setResolution(int width, int height)
{
makeVideoFlags();
if (!_surface || (_surface &&
(_surface->getSurface()->format->BitsPerPixel != _bpp ||
_surface->getSurface()->w != BASE_WIDTH ||
_surface->getSurface()->h != BASE_HEIGHT))) // don't reallocate _surface if not necessary, it's a waste of CPU cycles
{
if (_surface) delete _surface;
_surface = new Surface((int)BASE_WIDTH, (int)BASE_HEIGHT, 0, 0, Screen::isHQXEnabled() ? 32 : 8); // only HQX needs 32bpp for this surface; the OpenGL class has its own 32bpp buffer
if (_surface->getSurface()->format->BitsPerPixel == 8) _surface->setPalette(deferredPalette);
}
SDL_SetColorKey(_surface->getSurface(), 0, 0); // turn off color key!
Log(LOG_INFO) << "Attempting to set display to " << width << "x" << height << "x" << _bpp << "...";
_screen = SDL_SetVideoMode(width, height, _bpp, _flags);
if (_screen == 0)
{
throw Exception(SDL_GetError());
}
_scaleX = getWidth() / (double)BASE_WIDTH;
_scaleY = getHeight() / (double)BASE_HEIGHT;
if (isOpenGLEnabled())
{
glOutput.init(BASE_WIDTH, BASE_HEIGHT);
glOutput.linear = Options::getBool("useOpenGLSmoothing"); // setting from shader file will override this, though
glOutput.set_shader(CrossPlatform::getDataFile(Options::getString("useOpenGLShader")).c_str());
glOutput.setVSync(Options::getBool("vSyncForOpenGL"));
OpenGL::checkErrors = Options::getBool("checkOpenGLErrors");
}
Log(LOG_INFO) << "Display set to " << getWidth() << "x" << getHeight() << "x" << (int)_screen->format->BitsPerPixel << ".";
if (_screen->format->BitsPerPixel == 8)
{
setPalette(getPalette());
}
}
/**
* Resets the screen surfaces based on the current display options,
* as they don't automatically take effect.
* @param resetVideo Reset display surface.
*/
void Screen::resetDisplay(bool resetVideo)
{
int width = Options::displayWidth;
int height = Options::displayHeight;
#ifdef __linux__
Uint32 oldFlags = _flags;
#endif
makeVideoFlags();
if (!_surface || (_surface &&
(_surface->getSurface()->format->BitsPerPixel != _bpp ||
_surface->getSurface()->w != _baseWidth ||
_surface->getSurface()->h != _baseHeight))) // don't reallocate _surface if not necessary, it's a waste of CPU cycles
{
if (_surface) delete _surface;
_surface = new Surface(_baseWidth, _baseHeight, 0, 0, Screen::is32bitEnabled() ? 32 : 8); // only HQX needs 32bpp for this surface; the OpenGL class has its own 32bpp buffer
if (_surface->getSurface()->format->BitsPerPixel == 8) _surface->setPalette(deferredPalette);
}
SDL_SetColorKey(_surface->getSurface(), 0, 0); // turn off color key!
if (resetVideo || _screen->format->BitsPerPixel != _bpp)
{
#ifdef __linux__
// Workaround for segfault when switching to opengl
if (!(oldFlags & SDL_OPENGL) && (_flags & SDL_OPENGL))
{
Uint8 cursor = 0;
char *_oldtitle = 0;
SDL_WM_GetCaption(&_oldtitle, NULL);
std::string title(_oldtitle);
SDL_QuitSubSystem(SDL_INIT_VIDEO);
SDL_InitSubSystem(SDL_INIT_VIDEO);
SDL_ShowCursor(SDL_ENABLE);
SDL_EnableUNICODE(1);
SDL_WM_SetCaption(title.c_str(), 0);
SDL_SetCursor(SDL_CreateCursor(&cursor, &cursor, 1,1,0,0));
}
#endif
Log(LOG_INFO) << "Attempting to set display to " << width << "x" << height << "x" << _bpp << "...";
_screen = SDL_SetVideoMode(width, height, _bpp, _flags);
if (_screen == 0)
{
Log(LOG_ERROR) << SDL_GetError();
Log(LOG_INFO) << "Attempting to set display to default resolution...";
_screen = SDL_SetVideoMode(640, 400, _bpp, _flags);
if (_screen == 0)
{
throw Exception(SDL_GetError());
}
}
Log(LOG_INFO) << "Display set to " << getWidth() << "x" << getHeight() << "x" << (int)_screen->format->BitsPerPixel << ".";
}
else
{
clear();
}
Options::displayWidth = getWidth();
Options::displayHeight = getHeight();
_scaleX = getWidth() / (double)_baseWidth;
_scaleY = getHeight() / (double)_baseHeight;
_clear.x = 0;
_clear.y = 0;
_clear.w = getWidth();
_clear.h = getHeight();
double pixelRatioY = 1.0;
if (Options::nonSquarePixelRatio && !Options::allowResize)
{
pixelRatioY = 1.2;
}
bool cursorInBlackBands;
if (!Options::keepAspectRatio)
{
cursorInBlackBands = false;
}
else if (Options::fullscreen)
{
cursorInBlackBands = Options::cursorInBlackBandsInFullscreen;
}
else if (!Options::borderless)
{
cursorInBlackBands = Options::cursorInBlackBandsInWindow;
}
else
{
cursorInBlackBands = Options::cursorInBlackBandsInBorderlessWindow;
}
if (_scaleX > _scaleY && Options::keepAspectRatio)
{
int targetWidth = (int)floor(_scaleY * (double)_baseWidth);
_topBlackBand = _bottomBlackBand = 0;
_leftBlackBand = (getWidth() - targetWidth) / 2;
if (_leftBlackBand < 0)
{
_leftBlackBand = 0;
}
_rightBlackBand = getWidth() - targetWidth - _leftBlackBand;
_cursorTopBlackBand = 0;
if (cursorInBlackBands)
{
_scaleX = _scaleY;
_cursorLeftBlackBand = _leftBlackBand;
}
else
{
_cursorLeftBlackBand = 0;
}
}
else if (_scaleY > _scaleX && Options::keepAspectRatio)
{
int targetHeight = (int)floor(_scaleX * (double)_baseHeight * pixelRatioY);
_topBlackBand = (getHeight() - targetHeight) / 2;
if (_topBlackBand < 0)
{
_topBlackBand = 0;
}
_bottomBlackBand = getHeight() - targetHeight - _topBlackBand;
if (_bottomBlackBand < 0)
{
_bottomBlackBand = 0;
}
_leftBlackBand = _rightBlackBand = 0;
_cursorLeftBlackBand = 0;
if (cursorInBlackBands)
{
_scaleY = _scaleX;
_cursorTopBlackBand = _topBlackBand;
}
else
{
_cursorTopBlackBand = 0;
}
}
else
{
_topBlackBand = _bottomBlackBand = _leftBlackBand = _rightBlackBand = _cursorTopBlackBand = _cursorLeftBlackBand = 0;
}
if (isOpenGLEnabled())
{
#ifndef __NO_OPENGL
glOutput.init(_baseWidth, _baseHeight);
glOutput.linear = Options::useOpenGLSmoothing; // setting from shader file will override this, though
glOutput.set_shader(FileMap::getFilePath(Options::useOpenGLShader).c_str());
glOutput.setVSync(Options::vSyncForOpenGL);
OpenGL::checkErrors = Options::checkOpenGLErrors;
#endif
}
if (_screen->format->BitsPerPixel == 8)
{
setPalette(getPalette());
}
}