SDL_nximage.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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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
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slouken@libsdl.org
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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") ;
}