/
sdl-graphics.cpp
2320 lines (1897 loc) · 63.8 KB
/
sdl-graphics.cpp
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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "common/scummsys.h"
#if defined(SDL_BACKEND)
#include "backends/graphics/sdl/sdl-graphics.h"
#include "backends/events/sdl/sdl-events.h"
#include "backends/platform/sdl/sdl.h"
#include "common/config-manager.h"
#include "common/mutex.h"
#include "common/translation.h"
#include "common/util.h"
#ifdef USE_RGB_COLOR
#include "common/list.h"
#endif
#include "graphics/font.h"
#include "graphics/fontman.h"
#include "graphics/scaler.h"
#include "graphics/scaler/aspect.h"
#include "graphics/surface.h"
static const OSystem::GraphicsMode s_supportedGraphicsModes[] = {
{"1x", _s("Normal (no scaling)"), GFX_NORMAL},
#ifdef USE_SCALERS
{"2x", "2x", GFX_DOUBLESIZE},
{"3x", "3x", GFX_TRIPLESIZE},
{"2xsai", "2xSAI", GFX_2XSAI},
{"super2xsai", "Super2xSAI", GFX_SUPER2XSAI},
{"supereagle", "SuperEagle", GFX_SUPEREAGLE},
{"advmame2x", "AdvMAME2x", GFX_ADVMAME2X},
{"advmame3x", "AdvMAME3x", GFX_ADVMAME3X},
#ifdef USE_HQ_SCALERS
{"hq2x", "HQ2x", GFX_HQ2X},
{"hq3x", "HQ3x", GFX_HQ3X},
#endif
{"tv2x", "TV2x", GFX_TV2X},
{"dotmatrix", "DotMatrix", GFX_DOTMATRIX},
#endif
{0, 0, 0}
};
DECLARE_TRANSLATION_ADDITIONAL_CONTEXT("Normal (no scaling)", "lowres")
// Table of relative scalers magnitudes
// [definedScale - 1][scaleFactor - 1]
static ScalerProc *scalersMagn[3][3] = {
#ifdef USE_SCALERS
{ Normal1x, AdvMame2x, AdvMame3x },
{ Normal1x, Normal1x, Normal1o5x },
{ Normal1x, Normal1x, Normal1x }
#else // remove dependencies on other scalers
{ Normal1x, Normal1x, Normal1x },
{ Normal1x, Normal1x, Normal1x },
{ Normal1x, Normal1x, Normal1x }
#endif
};
static const int s_gfxModeSwitchTable[][4] = {
{ GFX_NORMAL, GFX_DOUBLESIZE, GFX_TRIPLESIZE, -1 },
{ GFX_NORMAL, GFX_ADVMAME2X, GFX_ADVMAME3X, -1 },
{ GFX_NORMAL, GFX_HQ2X, GFX_HQ3X, -1 },
{ GFX_NORMAL, GFX_2XSAI, -1, -1 },
{ GFX_NORMAL, GFX_SUPER2XSAI, -1, -1 },
{ GFX_NORMAL, GFX_SUPEREAGLE, -1, -1 },
{ GFX_NORMAL, GFX_TV2X, -1, -1 },
{ GFX_NORMAL, GFX_DOTMATRIX, -1, -1 }
};
#ifdef USE_SCALERS
static int cursorStretch200To240(uint8 *buf, uint32 pitch, int width, int height, int srcX, int srcY, int origSrcY);
#endif
AspectRatio::AspectRatio(int w, int h) {
// TODO : Validation and so on...
// Currently, we just ensure the program don't instantiate non-supported aspect ratios
_kw = w;
_kh = h;
}
#if !defined(_WIN32_WCE) && !defined(__SYMBIAN32__) && defined(USE_SCALERS)
static AspectRatio getDesiredAspectRatio() {
const size_t AR_COUNT = 4;
const char *desiredAspectRatioAsStrings[AR_COUNT] = { "auto", "4/3", "16/9", "16/10" };
const AspectRatio desiredAspectRatios[AR_COUNT] = { AspectRatio(0, 0), AspectRatio(4,3), AspectRatio(16,9), AspectRatio(16,10) };
//TODO : We could parse an arbitrary string, if we code enough proper validation
Common::String desiredAspectRatio = ConfMan.get("desired_screen_aspect_ratio");
for (size_t i = 0; i < AR_COUNT; i++) {
assert(desiredAspectRatioAsStrings[i] != NULL);
if (!scumm_stricmp(desiredAspectRatio.c_str(), desiredAspectRatioAsStrings[i])) {
return desiredAspectRatios[i];
}
}
// TODO : Report a warning
return AspectRatio(0, 0);
}
#endif
SdlGraphicsManager::SdlGraphicsManager(SdlEventSource *sdlEventSource)
:
_sdlEventSource(sdlEventSource),
#ifdef USE_OSD
_osdSurface(0), _osdAlpha(SDL_ALPHA_TRANSPARENT), _osdFadeStartTime(0),
#endif
_hwscreen(0), _screen(0), _tmpscreen(0),
#ifdef USE_RGB_COLOR
_screenFormat(Graphics::PixelFormat::createFormatCLUT8()),
_cursorFormat(Graphics::PixelFormat::createFormatCLUT8()),
#endif
_overlayVisible(false),
_overlayscreen(0), _tmpscreen2(0),
_scalerProc(0), _screenChangeCount(0),
_mouseVisible(false), _mouseNeedsRedraw(false), _mouseData(0), _mouseSurface(0),
_mouseOrigSurface(0), _cursorTargetScale(1), _cursorPaletteDisabled(true),
_currentShakePos(0), _newShakePos(0),
_paletteDirtyStart(0), _paletteDirtyEnd(0),
_screenIsLocked(false),
_graphicsMutex(0),
#ifdef USE_SDL_DEBUG_FOCUSRECT
_enableFocusRectDebugCode(false), _enableFocusRect(false), _focusRect(),
#endif
_transactionMode(kTransactionNone) {
if (SDL_InitSubSystem(SDL_INIT_VIDEO) == -1) {
error("Could not initialize SDL: %s", SDL_GetError());
}
// This is also called in initSDL(), but initializing graphics
// may reset it.
SDL_EnableUNICODE(1);
// allocate palette storage
_currentPalette = (SDL_Color *)calloc(sizeof(SDL_Color), 256);
_cursorPalette = (SDL_Color *)calloc(sizeof(SDL_Color), 256);
_mouseBackup.x = _mouseBackup.y = _mouseBackup.w = _mouseBackup.h = 0;
memset(&_mouseCurState, 0, sizeof(_mouseCurState));
_graphicsMutex = g_system->createMutex();
#ifdef USE_SDL_DEBUG_FOCUSRECT
if (ConfMan.hasKey("use_sdl_debug_focusrect"))
_enableFocusRectDebugCode = ConfMan.getBool("use_sdl_debug_focusrect");
#endif
SDL_ShowCursor(SDL_DISABLE);
memset(&_oldVideoMode, 0, sizeof(_oldVideoMode));
memset(&_videoMode, 0, sizeof(_videoMode));
memset(&_transactionDetails, 0, sizeof(_transactionDetails));
#if !defined(_WIN32_WCE) && !defined(__SYMBIAN32__) && defined(USE_SCALERS)
_videoMode.mode = GFX_DOUBLESIZE;
_videoMode.scaleFactor = 2;
_videoMode.aspectRatioCorrection = ConfMan.getBool("aspect_ratio");
_videoMode.desiredAspectRatio = getDesiredAspectRatio();
_scalerProc = Normal2x;
#else // for small screen platforms
_videoMode.mode = GFX_NORMAL;
_videoMode.scaleFactor = 1;
_videoMode.aspectRatioCorrection = false;
_scalerProc = Normal1x;
#endif
_scalerType = 0;
#if !defined(_WIN32_WCE) && !defined(__SYMBIAN32__)
_videoMode.fullscreen = ConfMan.getBool("fullscreen");
#else
_videoMode.fullscreen = true;
#endif
}
SdlGraphicsManager::~SdlGraphicsManager() {
// Unregister the event observer
if (g_system->getEventManager()->getEventDispatcher() != NULL)
g_system->getEventManager()->getEventDispatcher()->unregisterObserver(this);
unloadGFXMode();
if (_mouseSurface)
SDL_FreeSurface(_mouseSurface);
_mouseSurface = 0;
if (_mouseOrigSurface)
SDL_FreeSurface(_mouseOrigSurface);
_mouseOrigSurface = 0;
g_system->deleteMutex(_graphicsMutex);
free(_currentPalette);
free(_cursorPalette);
free(_mouseData);
}
void SdlGraphicsManager::initEventObserver() {
// Register the graphics manager as a event observer
g_system->getEventManager()->getEventDispatcher()->registerObserver(this, 10, false);
}
bool SdlGraphicsManager::hasFeature(OSystem::Feature f) {
return
(f == OSystem::kFeatureFullscreenMode) ||
(f == OSystem::kFeatureAspectRatioCorrection) ||
(f == OSystem::kFeatureCursorHasPalette) ||
(f == OSystem::kFeatureIconifyWindow);
}
void SdlGraphicsManager::setFeatureState(OSystem::Feature f, bool enable) {
switch (f) {
case OSystem::kFeatureFullscreenMode:
setFullscreenMode(enable);
break;
case OSystem::kFeatureAspectRatioCorrection:
setAspectRatioCorrection(enable);
break;
case OSystem::kFeatureIconifyWindow:
if (enable)
SDL_WM_IconifyWindow();
break;
default:
break;
}
}
bool SdlGraphicsManager::getFeatureState(OSystem::Feature f) {
assert (_transactionMode == kTransactionNone);
switch (f) {
case OSystem::kFeatureFullscreenMode:
return _videoMode.fullscreen;
case OSystem::kFeatureAspectRatioCorrection:
return _videoMode.aspectRatioCorrection;
default:
return false;
}
}
const OSystem::GraphicsMode *SdlGraphicsManager::supportedGraphicsModes() {
return s_supportedGraphicsModes;
}
const OSystem::GraphicsMode *SdlGraphicsManager::getSupportedGraphicsModes() const {
return s_supportedGraphicsModes;
}
int SdlGraphicsManager::getDefaultGraphicsMode() const {
return GFX_DOUBLESIZE;
}
void SdlGraphicsManager::resetGraphicsScale() {
setGraphicsMode(s_gfxModeSwitchTable[_scalerType][0]);
}
void SdlGraphicsManager::beginGFXTransaction() {
assert(_transactionMode == kTransactionNone);
_transactionMode = kTransactionActive;
_transactionDetails.sizeChanged = false;
_transactionDetails.needHotswap = false;
_transactionDetails.needUpdatescreen = false;
_transactionDetails.normal1xScaler = false;
#ifdef USE_RGB_COLOR
_transactionDetails.formatChanged = false;
#endif
_oldVideoMode = _videoMode;
}
OSystem::TransactionError SdlGraphicsManager::endGFXTransaction() {
int errors = OSystem::kTransactionSuccess;
assert(_transactionMode != kTransactionNone);
if (_transactionMode == kTransactionRollback) {
if (_videoMode.fullscreen != _oldVideoMode.fullscreen) {
errors |= OSystem::kTransactionFullscreenFailed;
_videoMode.fullscreen = _oldVideoMode.fullscreen;
} else if (_videoMode.aspectRatioCorrection != _oldVideoMode.aspectRatioCorrection) {
errors |= OSystem::kTransactionAspectRatioFailed;
_videoMode.aspectRatioCorrection = _oldVideoMode.aspectRatioCorrection;
} else if (_videoMode.mode != _oldVideoMode.mode) {
errors |= OSystem::kTransactionModeSwitchFailed;
_videoMode.mode = _oldVideoMode.mode;
_videoMode.scaleFactor = _oldVideoMode.scaleFactor;
#ifdef USE_RGB_COLOR
} else if (_videoMode.format != _oldVideoMode.format) {
errors |= OSystem::kTransactionFormatNotSupported;
_videoMode.format = _oldVideoMode.format;
_screenFormat = _videoMode.format;
#endif
} else if (_videoMode.screenWidth != _oldVideoMode.screenWidth || _videoMode.screenHeight != _oldVideoMode.screenHeight) {
errors |= OSystem::kTransactionSizeChangeFailed;
_videoMode.screenWidth = _oldVideoMode.screenWidth;
_videoMode.screenHeight = _oldVideoMode.screenHeight;
_videoMode.overlayWidth = _oldVideoMode.overlayWidth;
_videoMode.overlayHeight = _oldVideoMode.overlayHeight;
}
if (_videoMode.fullscreen == _oldVideoMode.fullscreen &&
_videoMode.aspectRatioCorrection == _oldVideoMode.aspectRatioCorrection &&
_videoMode.mode == _oldVideoMode.mode &&
_videoMode.screenWidth == _oldVideoMode.screenWidth &&
_videoMode.screenHeight == _oldVideoMode.screenHeight) {
// Our new video mode would now be exactly the same as the
// old one. Since we still can not assume SDL_SetVideoMode
// to be working fine, we need to invalidate the old video
// mode, so loadGFXMode would error out properly.
_oldVideoMode.setup = false;
}
}
#ifdef USE_RGB_COLOR
if (_transactionDetails.sizeChanged || _transactionDetails.formatChanged) {
#else
if (_transactionDetails.sizeChanged) {
#endif
unloadGFXMode();
if (!loadGFXMode()) {
if (_oldVideoMode.setup) {
_transactionMode = kTransactionRollback;
errors |= endGFXTransaction();
}
} else {
setGraphicsModeIntern();
clearOverlay();
_videoMode.setup = true;
// OSystem_SDL::pollEvent used to update the screen change count,
// but actually it gives problems when a video mode was changed
// but OSystem_SDL::pollEvent was not called. This for example
// caused a crash under certain circumstances when doing an RTL.
// To fix this issue we update the screen change count right here.
_screenChangeCount++;
}
} else if (_transactionDetails.needHotswap) {
setGraphicsModeIntern();
if (!hotswapGFXMode()) {
if (_oldVideoMode.setup) {
_transactionMode = kTransactionRollback;
errors |= endGFXTransaction();
}
} else {
_videoMode.setup = true;
// OSystem_SDL::pollEvent used to update the screen change count,
// but actually it gives problems when a video mode was changed
// but OSystem_SDL::pollEvent was not called. This for example
// caused a crash under certain circumstances when doing an RTL.
// To fix this issue we update the screen change count right here.
_screenChangeCount++;
if (_transactionDetails.needUpdatescreen)
internUpdateScreen();
}
} else if (_transactionDetails.needUpdatescreen) {
setGraphicsModeIntern();
internUpdateScreen();
}
_transactionMode = kTransactionNone;
return (OSystem::TransactionError)errors;
}
#ifdef USE_RGB_COLOR
Common::List<Graphics::PixelFormat> SdlGraphicsManager::getSupportedFormats() const {
assert(!_supportedFormats.empty());
return _supportedFormats;
}
void SdlGraphicsManager::detectSupportedFormats() {
// Clear old list
_supportedFormats.clear();
// Some tables with standard formats that we always list
// as "supported". If frontend code tries to use one of
// these, we will perform the necessary format
// conversion in the background. Of course this incurs a
// performance hit, but on desktop ports this should not
// matter. We still push the currently active format to
// the front, so if frontend code just uses the first
// available format, it will get one that is "cheap" to
// use.
const Graphics::PixelFormat RGBList[] = {
#ifdef USE_RGB_COLOR
// RGBA8888, ARGB8888, RGB888
Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0),
Graphics::PixelFormat(4, 8, 8, 8, 8, 16, 8, 0, 24),
Graphics::PixelFormat(3, 8, 8, 8, 0, 16, 8, 0, 0),
#endif
// RGB565, XRGB1555, RGB555, RGBA4444, ARGB4444
Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0),
Graphics::PixelFormat(2, 5, 5, 5, 1, 10, 5, 0, 15),
Graphics::PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0),
Graphics::PixelFormat(2, 4, 4, 4, 4, 12, 8, 4, 0),
Graphics::PixelFormat(2, 4, 4, 4, 4, 8, 4, 0, 12)
};
const Graphics::PixelFormat BGRList[] = {
#ifdef USE_RGB_COLOR
// ABGR8888, BGRA8888, BGR888
Graphics::PixelFormat(4, 8, 8, 8, 8, 0, 8, 16, 24),
Graphics::PixelFormat(4, 8, 8, 8, 8, 8, 16, 24, 0),
Graphics::PixelFormat(3, 8, 8, 8, 0, 0, 8, 16, 0),
#endif
// BGR565, XBGR1555, BGR555, ABGR4444, BGRA4444
Graphics::PixelFormat(2, 5, 6, 5, 0, 0, 5, 11, 0),
Graphics::PixelFormat(2, 5, 5, 5, 1, 0, 5, 10, 15),
Graphics::PixelFormat(2, 5, 5, 5, 0, 0, 5, 10, 0),
Graphics::PixelFormat(2, 4, 4, 4, 4, 0, 4, 8, 12),
Graphics::PixelFormat(2, 4, 4, 4, 4, 4, 8, 12, 0)
};
Graphics::PixelFormat format = Graphics::PixelFormat::createFormatCLUT8();
if (_hwscreen) {
// Get our currently set hardware format
format = Graphics::PixelFormat(_hwscreen->format->BytesPerPixel,
8 - _hwscreen->format->Rloss, 8 - _hwscreen->format->Gloss,
8 - _hwscreen->format->Bloss, 8 - _hwscreen->format->Aloss,
_hwscreen->format->Rshift, _hwscreen->format->Gshift,
_hwscreen->format->Bshift, _hwscreen->format->Ashift);
// Workaround to MacOSX SDL not providing an accurate Aloss value.
if (_hwscreen->format->Amask == 0)
format.aLoss = 8;
// Push it first, as the prefered format.
_supportedFormats.push_back(format);
}
// TODO: prioritize matching alpha masks
int i;
// Push some RGB formats
for (i = 0; i < ARRAYSIZE(RGBList); i++) {
if (_hwscreen && (RGBList[i].bytesPerPixel > format.bytesPerPixel))
continue;
if (RGBList[i] != format)
_supportedFormats.push_back(RGBList[i]);
}
// Push some BGR formats
for (i = 0; i < ARRAYSIZE(BGRList); i++) {
if (_hwscreen && (BGRList[i].bytesPerPixel > format.bytesPerPixel))
continue;
if (BGRList[i] != format)
_supportedFormats.push_back(BGRList[i]);
}
// Finally, we always supposed 8 bit palette graphics
_supportedFormats.push_back(Graphics::PixelFormat::createFormatCLUT8());
}
#endif
bool SdlGraphicsManager::setGraphicsMode(int mode) {
Common::StackLock lock(_graphicsMutex);
assert(_transactionMode == kTransactionActive);
if (_oldVideoMode.setup && _oldVideoMode.mode == mode)
return true;
int newScaleFactor = 1;
switch (mode) {
case GFX_NORMAL:
newScaleFactor = 1;
break;
#ifdef USE_SCALERS
case GFX_DOUBLESIZE:
newScaleFactor = 2;
break;
case GFX_TRIPLESIZE:
newScaleFactor = 3;
break;
case GFX_2XSAI:
newScaleFactor = 2;
break;
case GFX_SUPER2XSAI:
newScaleFactor = 2;
break;
case GFX_SUPEREAGLE:
newScaleFactor = 2;
break;
case GFX_ADVMAME2X:
newScaleFactor = 2;
break;
case GFX_ADVMAME3X:
newScaleFactor = 3;
break;
#ifdef USE_HQ_SCALERS
case GFX_HQ2X:
newScaleFactor = 2;
break;
case GFX_HQ3X:
newScaleFactor = 3;
break;
#endif
case GFX_TV2X:
newScaleFactor = 2;
break;
case GFX_DOTMATRIX:
newScaleFactor = 2;
break;
#endif // USE_SCALERS
default:
warning("unknown gfx mode %d", mode);
return false;
}
_transactionDetails.normal1xScaler = (mode == GFX_NORMAL);
if (_oldVideoMode.setup && _oldVideoMode.scaleFactor != newScaleFactor)
_transactionDetails.needHotswap = true;
_transactionDetails.needUpdatescreen = true;
_videoMode.mode = mode;
_videoMode.scaleFactor = newScaleFactor;
return true;
}
void SdlGraphicsManager::setGraphicsModeIntern() {
Common::StackLock lock(_graphicsMutex);
ScalerProc *newScalerProc = 0;
switch (_videoMode.mode) {
case GFX_NORMAL:
newScalerProc = Normal1x;
break;
#ifdef USE_SCALERS
case GFX_DOUBLESIZE:
newScalerProc = Normal2x;
break;
case GFX_TRIPLESIZE:
newScalerProc = Normal3x;
break;
case GFX_2XSAI:
newScalerProc = _2xSaI;
break;
case GFX_SUPER2XSAI:
newScalerProc = Super2xSaI;
break;
case GFX_SUPEREAGLE:
newScalerProc = SuperEagle;
break;
case GFX_ADVMAME2X:
newScalerProc = AdvMame2x;
break;
case GFX_ADVMAME3X:
newScalerProc = AdvMame3x;
break;
#ifdef USE_HQ_SCALERS
case GFX_HQ2X:
newScalerProc = HQ2x;
break;
case GFX_HQ3X:
newScalerProc = HQ3x;
break;
#endif
case GFX_TV2X:
newScalerProc = TV2x;
break;
case GFX_DOTMATRIX:
newScalerProc = DotMatrix;
break;
#endif // USE_SCALERS
default:
error("Unknown gfx mode %d", _videoMode.mode);
}
_scalerProc = newScalerProc;
if (_videoMode.mode != GFX_NORMAL) {
for (int i = 0; i < ARRAYSIZE(s_gfxModeSwitchTable); i++) {
if (s_gfxModeSwitchTable[i][1] == _videoMode.mode || s_gfxModeSwitchTable[i][2] == _videoMode.mode) {
_scalerType = i;
break;
}
}
}
if (!_screen || !_hwscreen)
return;
// Blit everything to the screen
_forceFull = true;
// Even if the old and new scale factors are the same, we may have a
// different scaler for the cursor now.
blitCursor();
}
int SdlGraphicsManager::getGraphicsMode() const {
assert (_transactionMode == kTransactionNone);
return _videoMode.mode;
}
void SdlGraphicsManager::initSize(uint w, uint h, const Graphics::PixelFormat *format) {
assert(_transactionMode == kTransactionActive);
#ifdef USE_RGB_COLOR
//avoid redundant format changes
Graphics::PixelFormat newFormat;
if (!format)
newFormat = Graphics::PixelFormat::createFormatCLUT8();
else
newFormat = *format;
assert(newFormat.bytesPerPixel > 0);
if (newFormat != _videoMode.format) {
_videoMode.format = newFormat;
_transactionDetails.formatChanged = true;
_screenFormat = newFormat;
}
#endif
// Avoid redundant res changes
if ((int)w == _videoMode.screenWidth && (int)h == _videoMode.screenHeight)
return;
_videoMode.screenWidth = w;
_videoMode.screenHeight = h;
_transactionDetails.sizeChanged = true;
}
int SdlGraphicsManager::effectiveScreenHeight() const {
return _videoMode.scaleFactor *
(_videoMode.aspectRatioCorrection
? real2Aspect(_videoMode.screenHeight)
: _videoMode.screenHeight);
}
static void fixupResolutionForAspectRatio(AspectRatio desiredAspectRatio, int &width, int &height) {
assert(&width != &height);
if (desiredAspectRatio.isAuto())
return;
int kw = desiredAspectRatio.kw();
int kh = desiredAspectRatio.kh();
const int w = width;
const int h = height;
SDL_Rect const* const*availableModes = SDL_ListModes(NULL, SDL_FULLSCREEN|SDL_SWSURFACE); //TODO : Maybe specify a pixel format
assert(availableModes);
const SDL_Rect *bestMode = NULL;
uint bestMetric = (uint)-1; // Metric is wasted space
while (const SDL_Rect *mode = *availableModes++) {
if (mode->w < w)
continue;
if (mode->h < h)
continue;
if (mode->h * kw != mode->w * kh)
continue;
uint metric = mode->w * mode->h - w * h;
if (metric > bestMetric)
continue;
bestMetric = metric;
bestMode = mode;
}
if (!bestMode) {
warning("Unable to enforce the desired aspect ratio");
return;
}
width = bestMode->w;
height = bestMode->h;
}
bool SdlGraphicsManager::loadGFXMode() {
_forceFull = true;
#if !defined(__MAEMO__) && !defined(DINGUX) && !defined(GPH_DEVICE) && !defined(LINUXMOTO) && !defined(OPENPANDORA)
_videoMode.overlayWidth = _videoMode.screenWidth * _videoMode.scaleFactor;
_videoMode.overlayHeight = _videoMode.screenHeight * _videoMode.scaleFactor;
if (_videoMode.screenHeight != 200 && _videoMode.screenHeight != 400)
_videoMode.aspectRatioCorrection = false;
if (_videoMode.aspectRatioCorrection)
_videoMode.overlayHeight = real2Aspect(_videoMode.overlayHeight);
_videoMode.hardwareWidth = _videoMode.screenWidth * _videoMode.scaleFactor;
_videoMode.hardwareHeight = effectiveScreenHeight();
#else
_videoMode.hardwareWidth = _videoMode.overlayWidth;
_videoMode.hardwareHeight = _videoMode.overlayHeight;
#endif
//
// Create the surface that contains the 8 bit game data
//
#ifdef USE_RGB_COLOR
_screen = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.screenWidth, _videoMode.screenHeight,
_screenFormat.bytesPerPixel << 3,
((1 << _screenFormat.rBits()) - 1) << _screenFormat.rShift ,
((1 << _screenFormat.gBits()) - 1) << _screenFormat.gShift ,
((1 << _screenFormat.bBits()) - 1) << _screenFormat.bShift ,
((1 << _screenFormat.aBits()) - 1) << _screenFormat.aShift );
if (_screen == NULL)
error("allocating _screen failed");
#else
_screen = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.screenWidth, _videoMode.screenHeight, 8, 0, 0, 0, 0);
if (_screen == NULL)
error("allocating _screen failed");
#endif
//
// Create the surface that contains the scaled graphics in 16 bit mode
//
if (_videoMode.fullscreen) {
fixupResolutionForAspectRatio(_videoMode.desiredAspectRatio, _videoMode.hardwareWidth, _videoMode.hardwareHeight);
}
_hwscreen = SDL_SetVideoMode(_videoMode.hardwareWidth, _videoMode.hardwareHeight, 16,
_videoMode.fullscreen ? (SDL_FULLSCREEN|SDL_SWSURFACE) : SDL_SWSURFACE
);
#ifdef USE_RGB_COLOR
detectSupportedFormats();
#endif
if (_hwscreen == NULL) {
// DON'T use error(), as this tries to bring up the debug
// console, which WON'T WORK now that _hwscreen is hosed.
if (!_oldVideoMode.setup) {
warning("SDL_SetVideoMode says we can't switch to that mode (%s)", SDL_GetError());
g_system->quit();
} else {
return false;
}
}
//
// Create the surface used for the graphics in 16 bit before scaling, and also the overlay
//
// Need some extra bytes around when using 2xSaI
_tmpscreen = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.screenWidth + 3, _videoMode.screenHeight + 3,
16,
_hwscreen->format->Rmask,
_hwscreen->format->Gmask,
_hwscreen->format->Bmask,
_hwscreen->format->Amask);
if (_tmpscreen == NULL)
error("allocating _tmpscreen failed");
_overlayscreen = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.overlayWidth, _videoMode.overlayHeight,
16,
_hwscreen->format->Rmask,
_hwscreen->format->Gmask,
_hwscreen->format->Bmask,
_hwscreen->format->Amask);
if (_overlayscreen == NULL)
error("allocating _overlayscreen failed");
_overlayFormat.bytesPerPixel = _overlayscreen->format->BytesPerPixel;
_overlayFormat.rLoss = _overlayscreen->format->Rloss;
_overlayFormat.gLoss = _overlayscreen->format->Gloss;
_overlayFormat.bLoss = _overlayscreen->format->Bloss;
_overlayFormat.aLoss = _overlayscreen->format->Aloss;
_overlayFormat.rShift = _overlayscreen->format->Rshift;
_overlayFormat.gShift = _overlayscreen->format->Gshift;
_overlayFormat.bShift = _overlayscreen->format->Bshift;
_overlayFormat.aShift = _overlayscreen->format->Ashift;
_tmpscreen2 = SDL_CreateRGBSurface(SDL_SWSURFACE, _videoMode.overlayWidth + 3, _videoMode.overlayHeight + 3,
16,
_hwscreen->format->Rmask,
_hwscreen->format->Gmask,
_hwscreen->format->Bmask,
_hwscreen->format->Amask);
if (_tmpscreen2 == NULL)
error("allocating _tmpscreen2 failed");
#ifdef USE_OSD
_osdSurface = SDL_CreateRGBSurface(SDL_SWSURFACE | SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA,
_hwscreen->w,
_hwscreen->h,
16,
_hwscreen->format->Rmask,
_hwscreen->format->Gmask,
_hwscreen->format->Bmask,
_hwscreen->format->Amask);
if (_osdSurface == NULL)
error("allocating _osdSurface failed");
SDL_SetColorKey(_osdSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, kOSDColorKey);
#endif
_sdlEventSource->resetKeyboadEmulation(
_videoMode.screenWidth * _videoMode.scaleFactor - 1,
effectiveScreenHeight() - 1);
// Distinguish 555 and 565 mode
if (_hwscreen->format->Rmask == 0x7C00)
InitScalers(555);
else
InitScalers(565);
return true;
}
void SdlGraphicsManager::unloadGFXMode() {
if (_screen) {
SDL_FreeSurface(_screen);
_screen = NULL;
}
if (_hwscreen) {
SDL_FreeSurface(_hwscreen);
_hwscreen = NULL;
}
if (_tmpscreen) {
SDL_FreeSurface(_tmpscreen);
_tmpscreen = NULL;
}
if (_tmpscreen2) {
SDL_FreeSurface(_tmpscreen2);
_tmpscreen2 = NULL;
}
if (_overlayscreen) {
SDL_FreeSurface(_overlayscreen);
_overlayscreen = NULL;
}
#ifdef USE_OSD
if (_osdSurface) {
SDL_FreeSurface(_osdSurface);
_osdSurface = NULL;
}
#endif
DestroyScalers();
}
bool SdlGraphicsManager::hotswapGFXMode() {
if (!_screen)
return false;
// Keep around the old _screen & _overlayscreen so we can restore the screen data
// after the mode switch.
SDL_Surface *old_screen = _screen;
_screen = NULL;
SDL_Surface *old_overlayscreen = _overlayscreen;
_overlayscreen = NULL;
// Release the HW screen surface
SDL_FreeSurface(_hwscreen); _hwscreen = NULL;
SDL_FreeSurface(_tmpscreen); _tmpscreen = NULL;
SDL_FreeSurface(_tmpscreen2); _tmpscreen2 = NULL;
#ifdef USE_OSD
// Release the OSD surface
SDL_FreeSurface(_osdSurface); _osdSurface = NULL;
#endif
// Setup the new GFX mode
if (!loadGFXMode()) {
unloadGFXMode();
_screen = old_screen;
_overlayscreen = old_overlayscreen;
return false;
}
// reset palette
SDL_SetColors(_screen, _currentPalette, 0, 256);
// Restore old screen content
SDL_BlitSurface(old_screen, NULL, _screen, NULL);
SDL_BlitSurface(old_overlayscreen, NULL, _overlayscreen, NULL);
// Free the old surfaces
SDL_FreeSurface(old_screen);
SDL_FreeSurface(old_overlayscreen);
// Update cursor to new scale
blitCursor();
// Blit everything to the screen
internUpdateScreen();
return true;
}
void SdlGraphicsManager::updateScreen() {
assert (_transactionMode == kTransactionNone);
Common::StackLock lock(_graphicsMutex); // Lock the mutex until this function ends
internUpdateScreen();
}
void SdlGraphicsManager::internUpdateScreen() {
SDL_Surface *srcSurf, *origSurf;
int height, width;
ScalerProc *scalerProc;
int scale1;
// definitions not available for non-DEBUG here. (needed this to compile in SYMBIAN32 & linux?)
#if defined (DEBUG) && !defined(WIN32) && !defined(_WIN32_WCE)
assert(_hwscreen != NULL);
assert(_hwscreen->map->sw_data != NULL);
#endif
// If the shake position changed, fill the dirty area with blackness
if (_currentShakePos != _newShakePos ||
(_mouseNeedsRedraw && _mouseBackup.y <= _currentShakePos)) {
SDL_Rect blackrect = {0, 0, _videoMode.screenWidth * _videoMode.scaleFactor, _newShakePos * _videoMode.scaleFactor};
if (_videoMode.aspectRatioCorrection && !_overlayVisible)
blackrect.h = real2Aspect(blackrect.h - 1) + 1;
SDL_FillRect(_hwscreen, &blackrect, 0);
_currentShakePos = _newShakePos;
_forceFull = true;
}
// Check whether the palette was changed in the meantime and update the
// screen surface accordingly.
if (_screen && _paletteDirtyEnd != 0) {
SDL_SetColors(_screen, _currentPalette + _paletteDirtyStart,
_paletteDirtyStart,
_paletteDirtyEnd - _paletteDirtyStart);
_paletteDirtyEnd = 0;
_forceFull = true;
}
#ifdef USE_OSD
// OSD visible (i.e. non-transparent)?
if (_osdAlpha != SDL_ALPHA_TRANSPARENT) {
// Updated alpha value
const int diff = SDL_GetTicks() - _osdFadeStartTime;
if (diff > 0) {
if (diff >= kOSDFadeOutDuration) {
// Back to full transparency
_osdAlpha = SDL_ALPHA_TRANSPARENT;
} else {
// Do a linear fade out...
const int startAlpha = SDL_ALPHA_TRANSPARENT + kOSDInitialAlpha * (SDL_ALPHA_OPAQUE - SDL_ALPHA_TRANSPARENT) / 100;
_osdAlpha = startAlpha + diff * (SDL_ALPHA_TRANSPARENT - startAlpha) / kOSDFadeOutDuration;
}
SDL_SetAlpha(_osdSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, _osdAlpha);