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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2003 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "sdl-common.h"
#include "common/scaler.h"
#include "common/util.h"
#include "common/engine.h" // Only #included for error() and warning()
class OSystem_SDL : public OSystem_SDL_Common {
public:
OSystem_SDL();
// Update the dirty areas of the screen
void update_screen();
// Set a parameter
uint32 property(int param, Property *value);
protected:
SDL_Surface *_hwscreen; // hardware screen
ScalerProc *_scaler_proc;
virtual void load_gfx_mode();
virtual void unload_gfx_mode();
void hotswap_gfx_mode();
};
OSystem_SDL_Common *OSystem_SDL_Common::create_intern() {
return new OSystem_SDL();
}
OSystem_SDL::OSystem_SDL()
: _hwscreen(0), _scaler_proc(0)
{
}
void OSystem_SDL::load_gfx_mode() {
_forceFull = true;
_mode_flags |= DF_UPDATE_EXPAND_1_PIXEL;
_tmpscreen = NULL;
_tmpScreenWidth = (_screenWidth + 3);
switch(_mode) {
case GFX_2XSAI:
_scaleFactor = 2;
_scaler_proc = _2xSaI;
break;
case GFX_SUPER2XSAI:
_scaleFactor = 2;
_scaler_proc = Super2xSaI;
break;
case GFX_SUPEREAGLE:
_scaleFactor = 2;
_scaler_proc = SuperEagle;
break;
case GFX_ADVMAME2X:
_scaleFactor = 2;
_scaler_proc = AdvMame2x;
break;
case GFX_ADVMAME3X:
_scaleFactor = 3;
_scaler_proc = AdvMame3x;
break;
case GFX_TV2X:
_scaleFactor = 2;
_scaler_proc = TV2x;
break;
case GFX_DOTMATRIX:
_scaleFactor = 2;
_scaler_proc = DotMatrix;
break;
case GFX_BILINEAR:
case GFX_DOUBLESIZE:
_scaleFactor = 2;
_scaler_proc = Normal2x;
break;
case GFX_TRIPLESIZE:
_scaleFactor = 3;
_scaler_proc = Normal3x;
break;
case GFX_NORMAL:
_scaleFactor = 1;
_scaler_proc = Normal1x;
break;
default:
error("unknown gfx mode %d", _mode);
_scaleFactor = 1;
_scaler_proc = NULL;
}
//
// Create the surface that contains the 8 bit game data
//
_screen = SDL_CreateRGBSurface(SDL_SWSURFACE, _screenWidth, _screenHeight, 8, 0, 0, 0, 0);
if (_screen == NULL)
error("_screen failed");
//
// Create the surface that contains the scaled graphics in 16 bit mode
//
_hwscreen = SDL_SetVideoMode(_screenWidth * _scaleFactor, (_adjustAspectRatio ? 240 : _screenHeight) * _scaleFactor, 16,
_full_screen ? (SDL_FULLSCREEN|SDL_SWSURFACE) : SDL_SWSURFACE
);
if (_hwscreen == NULL)
error("_hwscreen failed");
//
// Create the surface used for the graphics in 16 bit before scaling, and also the overlay
//
// Distinguish 555 and 565 mode
if (_hwscreen->format->Rmask == 0x7C00)
Init_2xSaI(555);
else
Init_2xSaI(565);
// Need some extra bytes around when using 2xSaI
uint16 *tmp_screen = (uint16 *)calloc(_tmpScreenWidth * (_screenHeight + 3), sizeof(uint16));
_tmpscreen = SDL_CreateRGBSurfaceFrom(tmp_screen,
_tmpScreenWidth, _screenHeight + 3, 16, _tmpScreenWidth * 2,
_hwscreen->format->Rmask,
_hwscreen->format->Gmask,
_hwscreen->format->Bmask,
_hwscreen->format->Amask);
if (_tmpscreen == NULL)
error("_tmpscreen failed");
// keyboard cursor control, some other better place for it?
km.x_max = _screenWidth * _scaleFactor - 1;
km.y_max = _screenHeight * _scaleFactor - 1;
km.delay_time = 25;
km.last_time = 0;
}
void OSystem_SDL::unload_gfx_mode() {
if (_screen) {
SDL_FreeSurface(_screen);
_screen = NULL;
}
if (_hwscreen) {
SDL_FreeSurface(_hwscreen);
_hwscreen = NULL;
}
if (_tmpscreen) {
free(_tmpscreen->pixels);
SDL_FreeSurface(_tmpscreen);
_tmpscreen = NULL;
}
}
void OSystem_SDL::hotswap_gfx_mode() {
if (!_screen)
return;
// Keep around the old _screen & _tmpscreen so we can restore the screen data
// after the mode switch.
SDL_Surface *old_screen = _screen;
SDL_Surface *old_tmpscreen = _tmpscreen;
// Release the HW screen surface
SDL_FreeSurface(_hwscreen);
// Setup the new GFX mode
load_gfx_mode();
// reset palette
SDL_SetColors(_screen, _currentPalette, 0, 256);
// Restore old screen content
SDL_BlitSurface(old_screen, NULL, _screen, NULL);
SDL_BlitSurface(old_tmpscreen, NULL, _tmpscreen, NULL);
// Free the old surfaces
SDL_FreeSurface(old_screen);
free(old_tmpscreen->pixels);
SDL_FreeSurface(old_tmpscreen);
// Finally, blit everything to the screen
update_screen();
}
void OSystem_SDL::update_screen() {
assert(_hwscreen != NULL);
StackLock lock(_graphicsMutex, this); // Lock the mutex until this function ends
// If the shake position changed, fill the dirty area with blackness
if (_currentShakePos != _newShakePos) {
SDL_Rect blackrect = {0, 0, _screenWidth * _scaleFactor, _newShakePos * _scaleFactor};
SDL_FillRect(_hwscreen, &blackrect, 0);
_currentShakePos = _newShakePos;
_forceFull = true;
}
// Make sure the mouse is drawn, if it should be drawn.
draw_mouse();
// Check whether the palette was changed in the meantime and update the
// screen surface accordingly.
if (_paletteDirtyEnd != 0) {
SDL_SetColors(_screen, _currentPalette + _paletteDirtyStart,
_paletteDirtyStart,
_paletteDirtyEnd - _paletteDirtyStart);
_paletteDirtyEnd = 0;
_forceFull = true;
}
// Force a full redraw if requested
if (_forceFull) {
_num_dirty_rects = 1;
_dirty_rect_list[0].x = 0;
_dirty_rect_list[0].y = 0;
_dirty_rect_list[0].w = _screenWidth;
_dirty_rect_list[0].h = _screenHeight;
}
// Only draw anything if necessary
if (_num_dirty_rects > 0) {
SDL_Rect *r;
SDL_Rect dst;
uint32 srcPitch, dstPitch;
SDL_Rect *last_rect = _dirty_rect_list + _num_dirty_rects;
if (_scaler_proc == Normal1x && !_adjustAspectRatio) {
SDL_Surface *target = _overlayVisible ? _tmpscreen : _screen;
for (r = _dirty_rect_list; r != last_rect; ++r) {
dst = *r;
if (_overlayVisible) {
// FIXME: I don't understand why this is necessary...
dst.x--;
dst.y--;
}
dst.y += _currentShakePos;
if (SDL_BlitSurface(target, r, _hwscreen, &dst) != 0)
error("SDL_BlitSurface failed: %s", SDL_GetError());
}
} else {
if (!_overlayVisible) {
for (r = _dirty_rect_list; r != last_rect; ++r) {
dst = *r;
dst.x++; // Shift rect by one since 2xSai needs to acces the data around
dst.y++; // any pixel to scale it, and we want to avoid mem access crashes.
if (SDL_BlitSurface(_screen, r, _tmpscreen, &dst) != 0)
error("SDL_BlitSurface failed: %s", SDL_GetError());
}
}
SDL_LockSurface(_tmpscreen);
SDL_LockSurface(_hwscreen);
srcPitch = _tmpscreen->pitch;
dstPitch = _hwscreen->pitch;
for (r = _dirty_rect_list; r != last_rect; ++r) {
register int dst_y = r->y + _currentShakePos;
register int dst_h = 0;
register int orig_dst_y = 0;
if (dst_y < _screenHeight) {
dst_h = r->h;
if (dst_h > _screenHeight - dst_y)
dst_h = _screenHeight - dst_y;
dst_y *= _scaleFactor;
if (_adjustAspectRatio) {
orig_dst_y = dst_y;
dst_y = real2Aspect(dst_y);
}
_scaler_proc((byte *)_tmpscreen->pixels + (r->x * 2 + 2) + (r->y + 1) * srcPitch, srcPitch,
(byte *)_hwscreen->pixels + r->x * 2 * _scaleFactor + dst_y * dstPitch, dstPitch, r->w, dst_h);
}
r->x *= _scaleFactor;
r->y = dst_y;
r->w *= _scaleFactor;
r->h = dst_h * _scaleFactor;
if (_adjustAspectRatio && orig_dst_y / _scaleFactor < _screenHeight)
r->h = stretch200To240((uint8 *) _hwscreen->pixels, dstPitch, r->w, r->h, r->x, r->y, orig_dst_y);
}
SDL_UnlockSurface(_tmpscreen);
SDL_UnlockSurface(_hwscreen);
}
// Readjust the dirty rect list in case we are doing a full update.
// This is necessary if shaking is active.
if (_forceFull) {
_dirty_rect_list[0].y = 0;
_dirty_rect_list[0].h = (_adjustAspectRatio ? 240 : _screenHeight) * _scaleFactor;
}
// Finally, blit all our changes to the screen
SDL_UpdateRects(_hwscreen, _num_dirty_rects, _dirty_rect_list);
}
_num_dirty_rects = 0;
_forceFull = false;
}
uint32 OSystem_SDL::property(int param, Property *value) {
StackLock lock(_graphicsMutex, this); // Lock the mutex until this function ends
if (param == PROP_TOGGLE_FULLSCREEN) {
assert(_hwscreen != 0);
_full_screen ^= true;
#ifdef MACOSX
// On OS X, SDL_WM_ToggleFullScreen is currently not implemented. Worse,
// it still always returns -1. So we simply don't call it at all and
// use hotswap_gfx_mode() directly to switch to fullscreen mode.
hotswap_gfx_mode();
#else
if (!SDL_WM_ToggleFullScreen(_hwscreen)) {
// if ToggleFullScreen fails, achieve the same effect with hotswap gfx mode
hotswap_gfx_mode();
}
#endif
return 1;
} else if (param == PROP_SET_GFX_MODE) {
if (value->gfx_mode >= 10)
return 0;
_mode = value->gfx_mode;
hotswap_gfx_mode();
return 1;
} else if (param == PROP_TOGGLE_ASPECT_RATIO) {
if (_screenHeight == 200) {
assert(_hwscreen != 0);
_adjustAspectRatio ^= true;
hotswap_gfx_mode();
}
}
return OSystem_SDL_Common::property(param, value);
}
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