view src/video/nanox/SDL_nximage.c @ 79:ffadd05de74d

Allow the user to override the relative mouse mode. They almost never want to do this, as it seriously affects applications that rely on continuous relative mouse motion.
author Sam Lantinga <slouken@lokigames.com>
date Sat, 23 Jun 2001 22:00:59 +0000
parents 57bf11a5efd7
children e8157fcb3114
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
    Copyright (C) 2001  Hsieh-Fu Tsai

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@devolution.com
    
    Hsieh-Fu Tsai
    clare@setabox.com
*/

#include <stdlib.h>

#include "SDL_error.h"

#include "SDL_nximage_c.h"

void NX_NormalUpdate (_THIS, int numrects, SDL_Rect * rects)
{
    int           i, j, xinc, yinc, destinc ;
    int           x, y, w, h ;
    unsigned char * src = NULL, * dest = NULL ;
            
    Dprintf ("enter NX_NormalUpdate\n") ;

    xinc = this -> screen -> format -> BytesPerPixel ;
    yinc = this -> screen -> pitch ;
        
    for (i = 0; i < numrects; ++ i) {
        x = rects [i].x, y = rects [i].y ;
        w = rects [i].w, h = rects [i].h ;
        src = SDL_Image + y * yinc + x * xinc ;
        dest = Image_buff ;
        destinc = w * xinc ;

        // apply GammaRamp table
#if (defined (NANOX_PIXEL_RGB) || defined (NANOX_PIXEL_0888) || \
     defined (NANOX_PIXEL_888))
        if (GammaRamp_R && GammaRamp_G && GammaRamp_B) {
            Uint8 * ptr ;
            int   k ;

            for (j = h; j > 0; -- j, src += yinc) {
                ptr = src - 1 ;
                for (k = w; k > 0; -- k) {
#ifdef NANOX_PIXEL_RGB
                    ptr += 2 ;
#endif
#ifdef NANOX_PIXEL_0888
                    ptr += 2 ;
#endif
#ifdef NANOX_PIXEL_888
                    ++ ptr ;
#endif
                    (* ptr) = GammaRamp_B [(* ptr)] ;
                    ++ ptr ;
                    (* ptr) = GammaRamp_G [(* ptr)] ;
                    ++ ptr ;
                    (* ptr) = GammaRamp_R [(* ptr)] ;
                }
            }
            src = SDL_Image + y * yinc + x * xinc ;
        }
#endif // apply Gamma table

        for (j = h; j > 0; -- j, src += yinc, dest += destinc) {
            memcpy (dest, src, destinc) ;
        }

        if (currently_fullscreen) {
            GrArea (FSwindow, SDL_GC, x + OffsetX, y + OffsetY, w, h, Image_buff, 
                pixel_type) ;
        } else {
            GrArea (SDL_Window, SDL_GC, x, y, w, h, Image_buff, pixel_type) ;
        }
    }

    Dprintf ("leave NX_NormalUpdate\n") ;
}

int NX_SetupImage (_THIS, SDL_Surface * screen)
{
    int size = screen -> h * screen -> pitch ;
    
    Dprintf ("enter NX_SetupImage\n") ;

    screen -> pixels = (void *) malloc (size) ;
    Image_buff = (unsigned char *) malloc (size) ;
    if (screen -> pixels == NULL || Image_buff == NULL) {
        free (screen -> pixels) ;
        free (Image_buff) ;
        SDL_OutOfMemory () ;
        return -1 ;
    }

    SDL_Image = (unsigned char *) screen -> pixels ;

    this -> UpdateRects = NX_NormalUpdate ;

    Dprintf ("leave NX_SetupImage\n") ;
    return 0 ;
}

void NX_DestroyImage (_THIS, SDL_Surface * screen)
{
    Dprintf ("enter NX_DestroyImage\n") ;
    
    if (SDL_Image) free (SDL_Image) ;
    if (Image_buff) free (Image_buff) ;
    if (screen) screen -> pixels = NULL ;
    
    Dprintf ("leave NX_DestroyImage\n") ;
}

int NX_ResizeImage (_THIS, SDL_Surface * screen, Uint32 flags)
{
    int            retval ;
    GR_SCREEN_INFO si ;

    Dprintf ("enter NX_ResizeImage\n") ;

    NX_DestroyImage (this, screen) ;
    retval = NX_SetupImage (this, screen) ;

    GrGetScreenInfo (& si) ;
    OffsetX = (si.cols - screen -> w) / 2 ;
    OffsetY = (si.rows - screen -> h) / 2 ;
    
    Dprintf ("leave NX_ResizeImage\n") ;
    return retval ;
}

void NX_RefreshDisplay (_THIS)
{
    Dprintf ("enter NX_RefreshDisplay\n") ;

    // Don't refresh a display that doesn't have an image (like GL)
    if (! SDL_Image) {
        return;
    }

    if (currently_fullscreen) {
        GrArea (FSwindow, SDL_GC, OffsetX, OffsetY, this -> screen -> w, 
            this -> screen -> h, SDL_Image, pixel_type) ;
    } else {
        GrArea (SDL_Window, SDL_GC, 0, 0, this -> screen -> w, 
            this -> screen -> h, SDL_Image, pixel_type) ;
    }

    Dprintf ("leave NX_RefreshDisplay\n") ;
}