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Annotation of previous/src/screen.c, revision 1.1

1.1     ! root        1: /*
        !             2:   Hatari - screen.c
        !             3: 
        !             4:   This file is distributed under the GNU Public License, version 2 or at your
        !             5:   option any later version. Read the file gpl.txt for details.
        !             6: 
        !             7: */
        !             8: 
        !             9: const char Screen_fileid[] = "Hatari screen.c : " __DATE__ " " __TIME__;
        !            10: 
        !            11: #include <SDL.h>
        !            12: #include <SDL_endian.h>
        !            13: 
        !            14: #include "main.h"
        !            15: #include "configuration.h"
        !            16: #include "log.h"
        !            17: #include "m68000.h"
        !            18: #include "paths.h"
        !            19: #include "screen.h"
        !            20: #include "control.h"
        !            21: #include "convert/routines.h"
        !            22: #include "resolution.h"
        !            23: #include "statusbar.h"
        !            24: #include "video.h"
        !            25: 
        !            26: 
        !            27: /* extern for several purposes */
        !            28: SDL_Surface *sdlscrn = NULL;                /* The SDL screen surface */
        !            29: int nScreenZoomX, nScreenZoomY;             /* Zooming factors, used for scaling mouse motions */
        !            30: int nBorderPixelsLeft, nBorderPixelsRight;  /* Pixels in left and right border */
        !            31: int nBorderPixelsTop, nBorderPixelsBottom;  /* Lines in top and bottom border */
        !            32: 
        !            33: /* extern for shortcuts and falcon/hostscreen.c */
        !            34: bool bGrabMouse = false;      /* Grab the mouse cursor in the window */
        !            35: bool bInFullScreen = false;   /* true if in full screen */
        !            36: 
        !            37: 
        !            38: /* extern for video.c */
        !            39: Uint8 pNEXTScreen[(1120*832)*2];
        !            40: FRAMEBUFFER *pFrameBuffer;    /* Pointer into current 'FrameBuffer' */
        !            41: 
        !            42: static FRAMEBUFFER FrameBuffers[NUM_FRAMEBUFFERS]; /* Store frame buffer details to tell how to update */
        !            43: static Uint8 *pNEXTScreenCopy;                       /* Keep track of current and previous ST screen data */
        !            44: static Uint8 *pPCScreenDest;                       /* Destination PC buffer */
        !            45: static int NEXTScreenEndHorizLine;                   /* End lines to be converted */
        !            46: static int PCScreenBytesPerLine;
        !            47: static int NEXTScreenWidthBytes;
        !            48: static SDL_Rect NEXTScreenRect;                      /* screen size without statusbar */
        !            49: 
        !            50: static int NEXTScreenLineOffset[910];  /* Offsets for ST screen lines eg, 0,160,320... */
        !            51: 
        !            52: static void (*ScreenDrawFunctionsNormal[3])(void); /* Screen draw functions */
        !            53: 
        !            54: static bool bScreenContentsChanged;     /* true if buffer changed and requires blitting */
        !            55: static bool bScrDoubleY;                /* true if double on Y */
        !            56: static int ScrUpdateFlag;               /* Bit mask of how to update screen */
        !            57: 
        !            58: 
        !            59: static bool Screen_DrawFrame(bool bForceFlip);
        !            60: 
        !            61: 
        !            62: /*-----------------------------------------------------------------------*/
        !            63: /**
        !            64:  * Create ST 0x777 / STe 0xfff color format to 16 or 32 bits per pixel
        !            65:  * conversion table. Called each time when changed resolution or to/from
        !            66:  * fullscreen mode.
        !            67:  */
        !            68: static void Screen_SetupRGBTable(void)
        !            69: {
        !            70: }
        !            71: 
        !            72: SDL_Color sdlColors[16];
        !            73: Uint32 colors[32];
        !            74: 
        !            75: /*-----------------------------------------------------------------------*/
        !            76: /**
        !            77:  * Create new palette for display.
        !            78:  */
        !            79: static void Screen_CreatePalette(void)
        !            80: {
        !            81: 
        !            82:        sdlColors[0].r = sdlColors[0].g = sdlColors[0].b = 255;
        !            83:        sdlColors[1].r = sdlColors[1].g = sdlColors[1].b = 160;
        !            84:        sdlColors[2].r = sdlColors[2].g = sdlColors[2].b = 80;
        !            85:        sdlColors[3].r = sdlColors[3].g = sdlColors[3].b = 0;
        !            86: }
        !            87: 
        !            88: 
        !            89: /*-----------------------------------------------------------------------*/
        !            90: /**
        !            91:  * Create 8-Bit palette for display if needed.
        !            92:  */
        !            93: static void Screen_Handle8BitPalettes(void)
        !            94: {
        !            95: }
        !            96: 
        !            97: 
        !            98: /*-----------------------------------------------------------------------*/
        !            99: /**
        !           100:  * Set screen draw functions.
        !           101:  */
        !           102: static void Screen_SetDrawFunctions(int nBitCount, bool bDoubleLowRes)
        !           103: {
        !           104:                ScreenDrawFunctionsNormal[ST_HIGH_RES] = ConvertHighRes_640x8Bit;
        !           105: }
        !           106: 
        !           107: 
        !           108: /*-----------------------------------------------------------------------*/
        !           109: /**
        !           110:  * Set amount of border pixels
        !           111:  */
        !           112: static void Screen_SetBorderPixels(int leftX, int leftY)
        !           113: {
        !           114: }
        !           115: 
        !           116: /*-----------------------------------------------------------------------*/
        !           117: /**
        !           118:  * store Y offset for each horizontal line in our source ST screen for
        !           119:  * reference in the convert functions.
        !           120:  */
        !           121: static void Screen_SetSTScreenOffsets(void)
        !           122: {
        !           123: }
        !           124: 
        !           125: 
        !           126: /*-----------------------------------------------------------------------*/
        !           127: /**
        !           128:  * Initialize SDL screen surface / set resolution.
        !           129:  */
        !           130: static void Screen_SetResolution(void)
        !           131: {
        !           132:        int Width, Height, nZoom, SBarHeight, BitCount, maxW, maxH;
        !           133:        Uint32 sdlVideoFlags;
        !           134:        bool bDoubleLowRes = false;
        !           135: 
        !           136:        BitCount = 8;
        !           137: 
        !           138:        nBorderPixelsTop = nBorderPixelsBottom = 0;
        !           139:        nBorderPixelsLeft = nBorderPixelsRight = 0;
        !           140: 
        !           141:        nScreenZoomX = 1;
        !           142:        nScreenZoomY = 1;
        !           143: 
        !           144:        Width = 1120;
        !           145:        Height = 832;
        !           146:        nZoom = 1;
        !           147: 
        !           148:        /* Statusbar height for doubled screen size */
        !           149:        SBarHeight = Statusbar_GetHeightForSize(1120, 832);
        !           150:        Resolution_GetLimits(&maxW, &maxH, &BitCount);
        !           151:                
        !           152:        
        !           153:        Screen_SetSTScreenOffsets();  
        !           154:        Height += Statusbar_SetHeight(Width, Height);
        !           155: 
        !           156:        /* SDL Video attributes: */
        !           157:        if (bInFullScreen)
        !           158:        {
        !           159:                sdlVideoFlags  = SDL_HWSURFACE|SDL_FULLSCREEN|SDL_HWPALETTE/*|SDL_DOUBLEBUF*/;
        !           160:                /* SDL_DOUBLEBUF helps avoiding tearing and can be faster on suitable HW,
        !           161:                 * but it doesn't work with partial screen updates done by the ST screen
        !           162:                 * update code or the Hatari GUI, so double buffering is disabled.
        !           163:                 */
        !           164:        }
        !           165:        else
        !           166:        {
        !           167:                sdlVideoFlags  = SDL_SWSURFACE|SDL_HWPALETTE;
        !           168:        }
        !           169: 
        !           170:        /* Check if we really have to change the video mode: */
        !           171:        if (!sdlscrn || sdlscrn->w != Width || sdlscrn->h != Height
        !           172:            || (BitCount && sdlscrn->format->BitsPerPixel != BitCount)
        !           173:            || (sdlscrn->flags&SDL_FULLSCREEN) != (sdlVideoFlags&SDL_FULLSCREEN))
        !           174:        {
        !           175: #ifdef _MUDFLAP
        !           176:                if (sdlscrn) {
        !           177:                        __mf_unregister(sdlscrn->pixels, sdlscrn->pitch*sdlscrn->h, __MF_TYPE_GUESS);
        !           178:                }
        !           179: #endif
        !           180:                if (bInFullScreen)
        !           181:                {
        !           182:                        /* unhide the Hatari WM window for fullscreen */
        !           183:                        Control_ReparentWindow(Width, Height, bInFullScreen);
        !           184:                }
        !           185:                
        !           186:                /* Set new video mode */
        !           187:                //fprintf(stderr,"Requesting video mode %i %i %i\n", Width, Height, BitCount);
        !           188:                sdlscrn = SDL_SetVideoMode(Width, Height, BitCount, sdlVideoFlags);
        !           189:                //fprintf(stderr,"Got video mode %i %i %i\n", sdlscrn->w, sdlscrn->h, sdlscrn->format->BitsPerPixel);
        !           190: 
        !           191:                /* By default ConfigureParams.Screen.nForceBpp and therefore
        !           192:                 * BitCount is zero which means "SDL color depth autodetection".
        !           193:                 * In this case the SDL_SetVideoMode() call might return
        !           194:                 * a 24 bpp resolution
        !           195:                 */
        !           196:                if (sdlscrn && sdlscrn->format->BitsPerPixel == 24)
        !           197:                {
        !           198:                        fprintf(stderr, "Unsupported color depth 24, trying 32 bpp instead...\n");
        !           199:                        sdlscrn = SDL_SetVideoMode(Width, Height, 32, sdlVideoFlags);
        !           200:                }
        !           201: 
        !           202:                /* Exit if we can not open a screen */
        !           203:                if (!sdlscrn)
        !           204:                {
        !           205:                        fprintf(stderr, "Could not set video mode:\n %s\n", SDL_GetError() );
        !           206:                        SDL_Quit();
        !           207:                        exit(-2);
        !           208:                }
        !           209: #ifdef _MUDFLAP
        !           210:                __mf_register(sdlscrn->pixels, sdlscrn->pitch*sdlscrn->h, __MF_TYPE_GUESS, "SDL pixels");
        !           211: #endif
        !           212: 
        !           213:                if (!bInFullScreen)
        !           214:                {
        !           215:                        /* re-embed the new Hatari SDL window */
        !           216:                        Control_ReparentWindow(Width, Height, bInFullScreen);
        !           217:                }
        !           218:                
        !           219:                /* Re-init screen palette: */
        !           220:                if (sdlscrn->format->BitsPerPixel == 8)
        !           221:                        Screen_Handle8BitPalettes();    /* Initialize new 8 bit palette */
        !           222:                else
        !           223:                        Screen_SetupRGBTable();         /* Create color convertion table */
        !           224: 
        !           225:                Statusbar_Init(sdlscrn);
        !           226:                
        !           227:                /* screen area without the statusbar */
        !           228:                NEXTScreenRect.x = 0;
        !           229:                NEXTScreenRect.y = 0;
        !           230:                NEXTScreenRect.w = sdlscrn->w;
        !           231:                NEXTScreenRect.h = sdlscrn->h - Statusbar_GetHeight();
        !           232:        }
        !           233: 
        !           234:        /* Set drawing functions */
        !           235:        Screen_SetDrawFunctions(sdlscrn->format->BitsPerPixel, bDoubleLowRes);
        !           236: 
        !           237:        Screen_SetFullUpdate();           /* Cause full update of screen */
        !           238: }
        !           239: 
        !           240: 
        !           241: /*-----------------------------------------------------------------------*/
        !           242: /**
        !           243:  * Init Screen bitmap and buffers/tables needed for ST to PC screen conversion
        !           244:  */
        !           245: void Screen_Init(void)
        !           246: {
        !           247:        int i;
        !           248:        SDL_Surface *pIconSurf;
        !           249:        char sIconFileName[FILENAME_MAX];
        !           250: 
        !           251:        /* Clear frame buffer structures and set current pointer */
        !           252:        memset(FrameBuffers, 0, NUM_FRAMEBUFFERS * sizeof(FRAMEBUFFER));
        !           253: 
        !           254:        /* Allocate previous screen check workspace. We are going to double-buffer a double-buffered screen. Oh. */
        !           255:        for (i = 0; i < NUM_FRAMEBUFFERS; i++)
        !           256:        {
        !           257:                FrameBuffers[i].pNEXTScreen = malloc(((1024)/8)*768);
        !           258:                FrameBuffers[i].pNEXTScreenCopy = malloc(((1024)/8)*768);
        !           259:                if (!FrameBuffers[i].pNEXTScreen || !FrameBuffers[i].pNEXTScreenCopy)
        !           260:                {
        !           261:                        fprintf(stderr, "Failed to allocate frame buffer memory.\n");
        !           262:                        exit(-1);
        !           263:                }
        !           264:        }
        !           265:        pFrameBuffer = &FrameBuffers[0];
        !           266: 
        !           267:        /* Load and set icon */
        !           268:        snprintf(sIconFileName, sizeof(sIconFileName), "%s%cprevious-icon.bmp",
        !           269:                 Paths_GetDataDir(), PATHSEP);
        !           270:        pIconSurf = SDL_LoadBMP(sIconFileName);
        !           271:        if (pIconSurf)
        !           272:        {
        !           273:                SDL_SetColorKey(pIconSurf, SDL_SRCCOLORKEY, SDL_MapRGB(pIconSurf->format, 255, 255, 255));
        !           274:                SDL_WM_SetIcon(pIconSurf, NULL);
        !           275:                SDL_FreeSurface(pIconSurf);
        !           276:        }
        !           277: 
        !           278:        /* Set initial window resolution */
        !           279:        bInFullScreen = ConfigureParams.Screen.bFullScreen;
        !           280:        Screen_SetResolution();
        !           281: 
        !           282:        if (bGrabMouse)
        !           283:                SDL_WM_GrabInput(SDL_GRAB_ON);
        !           284: 
        !           285:        Video_SetScreenRasters();                       /* Set rasters ready for first screen */
        !           286: 
        !           287:        Screen_CreatePalette();
        !           288:        /* Configure some SDL stuff: */
        !           289:        SDL_WM_SetCaption(PROG_NAME, "Previous");
        !           290:        SDL_ShowCursor(SDL_DISABLE);
        !           291: }
        !           292: 
        !           293: 
        !           294: /*-----------------------------------------------------------------------*/
        !           295: /**
        !           296:  * Free screen bitmap and allocated resources
        !           297:  */
        !           298: void Screen_UnInit(void)
        !           299: {
        !           300:        int i;
        !           301: 
        !           302:        /* Free memory used for copies */
        !           303:        for (i = 0; i < NUM_FRAMEBUFFERS; i++)
        !           304:        {
        !           305:                free(FrameBuffers[i].pNEXTScreen);
        !           306:                free(FrameBuffers[i].pNEXTScreenCopy);
        !           307:        }
        !           308: }
        !           309: 
        !           310: 
        !           311: /*-----------------------------------------------------------------------*/
        !           312: /**
        !           313:  * Reset screen
        !           314:  */
        !           315: void Screen_Reset(void)
        !           316: {
        !           317:        /* Cause full update */
        !           318:        Screen_ModeChanged();
        !           319: }
        !           320: 
        !           321: 
        !           322: /*-----------------------------------------------------------------------*/
        !           323: /**
        !           324:  * Set flags so screen will be TOTALLY re-drawn (clears whole of full-screen)
        !           325:  * next time around
        !           326:  */
        !           327: void Screen_SetFullUpdate(void)
        !           328: {
        !           329:        int i;
        !           330: 
        !           331:        /* Update frame buffers */
        !           332:        for (i = 0; i < NUM_FRAMEBUFFERS; i++)
        !           333:                FrameBuffers[i].bFullUpdate = true;
        !           334: }
        !           335: 
        !           336: 
        !           337: /*-----------------------------------------------------------------------*/
        !           338: /**
        !           339:  * Clear Window display memory
        !           340:  */
        !           341: static void Screen_ClearScreen(void)
        !           342: {
        !           343:        SDL_FillRect(sdlscrn, &NEXTScreenRect, SDL_MapRGB(sdlscrn->format, 0, 0, 0));
        !           344: }
        !           345: 
        !           346: 
        !           347: /*-----------------------------------------------------------------------*/
        !           348: /**
        !           349:  * Return true if (falcon/tt) hostscreen functions need to be used
        !           350:  * instead of the (st/ste) functions here.
        !           351:  */
        !           352: static bool Screen_UseHostScreen(void)
        !           353: {
        !           354:        return false;
        !           355: }
        !           356: 
        !           357: /*-----------------------------------------------------------------------*/
        !           358: /**
        !           359:  * Force screen redraw.  Does the right thing regardless of whether
        !           360:  * we're in ST/STe, Falcon or TT mode.  Needed when switching modes
        !           361:  * while emulation is paused.
        !           362:  */
        !           363: static void Screen_Refresh(void)
        !           364: {
        !           365:        Screen_DrawFrame(true);
        !           366: }
        !           367: 
        !           368: 
        !           369: /*-----------------------------------------------------------------------*/
        !           370: /**
        !           371:  * Enter Full screen mode
        !           372:  */
        !           373: void Screen_EnterFullScreen(void)
        !           374: {
        !           375:        bool bWasRunning;
        !           376: 
        !           377:        if (!bInFullScreen)
        !           378:        {
        !           379:                /* Hold things... */
        !           380:                bWasRunning = Main_PauseEmulation(false);
        !           381:                bInFullScreen = true;
        !           382: 
        !           383:                if (Screen_UseHostScreen())
        !           384:                {
        !           385: //                     HostScreen_toggleFullScreen();
        !           386:                }
        !           387:                else
        !           388:                {
        !           389:                        Screen_SetResolution();
        !           390:                        Screen_ClearScreen();       /* Black out screen bitmap as will be invalid when return */
        !           391:                }
        !           392: 
        !           393:                SDL_Delay(20);                  /* To give monitor time to change to new resolution */
        !           394:                
        !           395:                if (bWasRunning)
        !           396:                {
        !           397:                        /* And off we go... */
        !           398:                        Main_UnPauseEmulation();
        !           399:                }
        !           400:                else
        !           401:                {
        !           402:                        Screen_Refresh();
        !           403:                }
        !           404:                SDL_WM_GrabInput(SDL_GRAB_ON);  /* Grab mouse pointer in fullscreen */
        !           405:        }
        !           406: }
        !           407: 
        !           408: 
        !           409: /*-----------------------------------------------------------------------*/
        !           410: /**
        !           411:  * Return from Full screen mode back to a window
        !           412:  */
        !           413: void Screen_ReturnFromFullScreen(void)
        !           414: {
        !           415:        bool bWasRunning;
        !           416: 
        !           417:        if (bInFullScreen)
        !           418:        {
        !           419:                /* Hold things... */
        !           420:                bWasRunning = Main_PauseEmulation(false);
        !           421:                bInFullScreen = false;
        !           422: 
        !           423:                if (Screen_UseHostScreen())
        !           424:                {
        !           425: //                     HostScreen_toggleFullScreen();
        !           426:                }
        !           427:                else
        !           428:                {
        !           429:                        Screen_SetResolution();
        !           430:                }
        !           431:                SDL_Delay(20);                /* To give monitor time to switch resolution */
        !           432: 
        !           433:                if (bWasRunning)
        !           434:                {
        !           435:                        /* And off we go... */
        !           436:                        Main_UnPauseEmulation();
        !           437:                }
        !           438:                else
        !           439:                {
        !           440:                        Screen_Refresh();
        !           441:                }
        !           442: 
        !           443:                if (!bGrabMouse)
        !           444:                {
        !           445:                        /* Un-grab mouse pointer in windowed mode */
        !           446:                        SDL_WM_GrabInput(SDL_GRAB_OFF);
        !           447:                }
        !           448:        }
        !           449: }
        !           450: 
        !           451: 
        !           452: /*-----------------------------------------------------------------------*/
        !           453: /**
        !           454:  * Have we changed between low/med/high res?
        !           455:  */
        !           456: static void Screen_DidResolutionChange(int new_res)
        !           457: {
        !           458: }
        !           459: 
        !           460: 
        !           461: /*-----------------------------------------------------------------------*/
        !           462: /**
        !           463:  * Force things associated with changing between low/medium/high res.
        !           464:  */
        !           465: void Screen_ModeChanged(void)
        !           466: {
        !           467:        if (!sdlscrn)
        !           468:        {
        !           469:                /* screen not yet initialized */
        !           470:                return;
        !           471:        }
        !           472:                /* Set new display mode, if differs from current */
        !           473:                Screen_SetResolution();
        !           474:                Screen_SetFullUpdate();
        !           475:        if (bInFullScreen || bGrabMouse)
        !           476:                SDL_WM_GrabInput(SDL_GRAB_ON);
        !           477:        else
        !           478:                SDL_WM_GrabInput(SDL_GRAB_OFF);
        !           479: }
        !           480: 
        !           481: 
        !           482: /*-----------------------------------------------------------------------*/
        !           483: /**
        !           484:  * Compare current resolution on line with previous, and set 'UpdateLine' accordingly
        !           485:  * Return if swap between low/medium resolution
        !           486:  */
        !           487: static bool Screen_CompareResolution(int y, int *pUpdateLine, int oldres)
        !           488: {
        !           489:        return false;
        !           490: }
        !           491: 
        !           492: 
        !           493: /*-----------------------------------------------------------------------*/
        !           494: /**
        !           495:  * Check to see if palette changes cause screen update and keep 'HBLPalette[]' up-to-date
        !           496:  */
        !           497: static void Screen_ComparePalette(int y, int *pUpdateLine)
        !           498: {
        !           499: }
        !           500: 
        !           501: 
        !           502: /*-----------------------------------------------------------------------*/
        !           503: /**
        !           504:  * Check for differences in Palette and Resolution from Mask table and update
        !           505:  * and store off which lines need updating and create full-screen palette.
        !           506:  * (It is very important for these routines to check for colour changes with
        !           507:  * the previous screen so only the very minimum parts are updated).
        !           508:  * Return new STRes value.
        !           509:  */
        !           510: static int Screen_ComparePaletteMask(int res)
        !           511: {
        !           512:        return 0;
        !           513: }
        !           514: 
        !           515: 
        !           516: /*-----------------------------------------------------------------------*/
        !           517: /**
        !           518:  * Update Palette Mask to show 'full-update' required. This is usually done after a resolution change
        !           519:  * or when going between a Window and full-screen display
        !           520:  */
        !           521: static void Screen_SetFullUpdateMask(void)
        !           522: {
        !           523: }
        !           524: 
        !           525: 
        !           526: /*-----------------------------------------------------------------------*/
        !           527: /**
        !           528:  * Set details for ST screen conversion.
        !           529:  */
        !           530: static void Screen_SetConvertDetails(void)
        !           531: {
        !           532: }
        !           533: 
        !           534: 
        !           535: /*-----------------------------------------------------------------------*/
        !           536: /**
        !           537:  * Lock full-screen for drawing
        !           538:  */
        !           539: static bool Screen_Lock(void)
        !           540: {
        !           541:        if (SDL_MUSTLOCK(sdlscrn))
        !           542:        {
        !           543:                if (SDL_LockSurface(sdlscrn))
        !           544:                {
        !           545:                        Screen_ReturnFromFullScreen();   /* All OK? If not need to jump back to a window */
        !           546:                        return false;
        !           547:                }
        !           548:        }
        !           549: 
        !           550:        return true;
        !           551: }
        !           552: 
        !           553: /*-----------------------------------------------------------------------*/
        !           554: /**
        !           555:  * UnLock full-screen
        !           556:  */
        !           557: static void Screen_UnLock(void)
        !           558: {
        !           559:        if ( SDL_MUSTLOCK(sdlscrn) )
        !           560:                SDL_UnlockSurface(sdlscrn);
        !           561: }
        !           562: 
        !           563: 
        !           564: /*-----------------------------------------------------------------------*/
        !           565: /**
        !           566:  * Blit our converted ST screen to window/full-screen
        !           567:  */
        !           568: static void Screen_Blit(void)
        !           569: {
        !           570:        unsigned char *pTmpScreen;
        !           571: 
        !           572:        {
        !           573:                SDL_UpdateRects(sdlscrn, 1, &NEXTScreenRect);
        !           574:        }
        !           575: 
        !           576:        /* Swap copy/raster buffers in screen. */
        !           577:        pTmpScreen = pFrameBuffer->pNEXTScreenCopy;
        !           578:        pFrameBuffer->pNEXTScreenCopy = pFrameBuffer->pNEXTScreen;
        !           579:        pFrameBuffer->pNEXTScreen = pTmpScreen;
        !           580: }
        !           581: 
        !           582: 
        !           583: /*-----------------------------------------------------------------------*/
        !           584: /**
        !           585:  */
        !           586: static bool Screen_DrawFrame(bool bForceFlip)
        !           587: {
        !           588:        int new_res;
        !           589:        void (*pDrawFunction)(void);
        !           590:        
        !           591:        /* Lock screen ready for drawing */
        !           592:        if (Screen_Lock())
        !           593:        {
        !           594:                
        !           595:                pDrawFunction = ScreenDrawFunctionsNormal[ST_HIGH_RES];
        !           596: 
        !           597:                if (pDrawFunction)
        !           598:                        CALL_VAR(pDrawFunction);
        !           599: 
        !           600:                /* Unlock screen */
        !           601:                Screen_UnLock();
        !           602: 
        !           603:                /* draw statusbar or overlay led(s) after unlock */
        !           604:                Statusbar_OverlayBackup(sdlscrn);
        !           605:                Statusbar_Update(sdlscrn);
        !           606: 
        !           607:                Screen_Blit();
        !           608: 
        !           609:                return bScreenContentsChanged;
        !           610:        }
        !           611: 
        !           612:        return false;
        !           613: }
        !           614: 
        !           615: 
        !           616: /*-----------------------------------------------------------------------*/
        !           617: /**
        !           618:  * Draw ST screen to window/full-screen
        !           619:  */
        !           620: bool Screen_Draw(void)
        !           621: {
        !           622:        if (!bQuitProgram)
        !           623:        {
        !           624:                /* And draw (if screen contents changed) */
        !           625:                Screen_DrawFrame(false);
        !           626:                return true;
        !           627:        }
        !           628: 
        !           629:        return false;
        !           630: }
        !           631: 
        !           632: 
        !           633: /* -------------- screen conversion routines --------------------------------
        !           634: */
        !           635: 
        !           636: 
        !           637: /*-----------------------------------------------------------------------*/
        !           638: /**
        !           639:  */
        !           640: static int AdjustLinePaletteRemap(int y)
        !           641: {
        !           642:        return true;
        !           643: }
        !           644: 
        !           645: 
        !           646: /*-----------------------------------------------------------------------*/
        !           647: /**
        !           648:  */
        !           649: static void Convert_StartFrame(void)
        !           650: {
        !           651: }
        !           652: 
        !           653: /* lookup tables and conversion macros */
        !           654: #include "convert/macros.h"
        !           655: 
        !           656: /* Conversion routines */
        !           657: 
        !           658: #include "convert/high640x8.c"    /* HighRes To 640xH x 8-bit color */
        !           659: 

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