/*

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@libsdl.org

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") ;

}