grafX2/sdlscreen.c
Yves Rizoud 663229efb3 Fixed compilation error on Linux (name conflicts, issue 132)
Load/Save: Fixed display of mount points and drives ("Select drive" button)
Started documenting global variables


git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@698 416bcca6-2ee7-4201-b75f-2eb2f807beb1
2009-03-27 20:14:28 +00:00

191 lines
5.0 KiB
C

/* Grafx2 - The Ultimate 256-color bitmap paint program
Copyright 2008 Yves Rizoud
Copyright 2008 Franck Charlet
Copyright 2007 Adrien Destugues
Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
Grafx2 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; version 2
of the License.
Grafx2 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 Grafx2; if not, see <http://www.gnu.org/licenses/> or
write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include <stdlib.h>
#include <SDL.h>
#include "global.h"
#include "sdlscreen.h"
#include "erreurs.h"
#include "divers.h"
// Mise à jour minimaliste en nombre de pixels
#define UPDATE_METHOD_MULTI_RECTANGLE 1
// Mise à jour intermédiaire, par rectangle inclusif.
#define UPDATE_METHOD_CUMULATED 2
// Mise à jour totale, pour les plate-formes qui imposent un Vsync à chaque mise à jour écran.
#define UPDATE_METHOD_FULL_PAGE 3
// UPDATE_METHOD peut être fixé depuis le makefile, sinon c'est ici:
#ifndef UPDATE_METHOD
#if defined(__macosx__) || defined(__FreeBSD__)
#define UPDATE_METHOD UPDATE_METHOD_FULL_PAGE
#else
#define UPDATE_METHOD UPDATE_METHOD_CUMULATED
#endif
#endif
void Set_mode_SDL(int *width, int *height, int fullscreen)
/* On règle la résolution de l'écran */
{
Screen_SDL=SDL_SetVideoMode(*width,*height,8,(fullscreen?SDL_FULLSCREEN:0)|SDL_RESIZABLE);
if(Screen_SDL != NULL)
{
// Vérification du mode obtenu (ce n'est pas toujours celui demandé)
if (Screen_SDL->w != *width || Screen_SDL->h != *height)
{
DEBUG("Error mode video obtenu différent de celui demandé !!",0);
*width = Screen_SDL->w;
*height = Screen_SDL->h;
}
Screen_pixels=Screen_SDL->pixels;
}
else
DEBUG("Error changement de mode video !!",0);
SDL_ShowCursor(0); // Cache le curseur SDL, on le gère en soft
}
#if (UPDATE_METHOD == UPDATE_METHOD_CUMULATED)
short Min_X=0;
short Min_Y=0;
short Max_X=10000;
short Max_Y=10000;
#endif
#if (UPDATE_METHOD == UPDATE_METHOD_FULL_PAGE)
int update_is_required=0;
#endif
void Flush_update(void)
{
#if (UPDATE_METHOD == UPDATE_METHOD_FULL_PAGE)
// Mise à jour de la totalité de l'écran
if (update_is_required)
{
SDL_UpdateRect(Screen_SDL, 0, 0, 0, 0);
update_is_required=0;
}
#endif
#if (UPDATE_METHOD == UPDATE_METHOD_CUMULATED)
if (Min_X>=Max_X || Min_Y>=Max_Y)
{
; // Rien a faire
}
else
{
if (Min_X<0)
Min_X=0;
if (Min_Y<0)
Min_Y=0;
SDL_UpdateRect(Screen_SDL, Min_X*Pixel_width, Min_Y*Pixel_height, Min(Screen_width-Min_X, Max_X-Min_X)*Pixel_width, Min(Screen_height-Min_Y, Max_Y-Min_Y)*Pixel_height);
Min_X=Min_Y=10000;
Max_X=Max_Y=0;
}
#endif
}
void Update_rect(short x, short y, unsigned short width, unsigned short height)
{
#if (UPDATE_METHOD == UPDATE_METHOD_MULTI_RECTANGLE)
SDL_UpdateRect(Screen_SDL, x*Pixel_width, y*Pixel_height, width*Pixel_width, height*Pixel_height);
#endif
#if (UPDATE_METHOD == UPDATE_METHOD_CUMULATED)
if (width==0 || height==0)
{
Min_X=Min_Y=0;
Max_X=Max_Y=10000;
}
else
{
if (x < Min_X)
Min_X = x;
if (y < Min_Y)
Min_Y = y;
if (x+width>Max_X)
Max_X=x+width;
if (y+height>Max_Y)
Max_Y=y+height;
}
#endif
#if (UPDATE_METHOD == UPDATE_METHOD_FULL_PAGE)
update_is_required=1;
#endif
}
// Convertit une SDL_Surface (couleurs indexées ou RGB) en tableau de bytes (couleurs indexées)
// Si on passe NULL comme destination, elle est allouée par malloc(). Sinon,
// attention aux dimensions!
byte * Surface_to_bytefield(SDL_Surface *source, byte * dest)
{
byte *src;
byte *dest_ptr;
int y;
int remainder;
// Support seulement des images 256 couleurs
if (source->format->BytesPerPixel != 1)
return NULL;
if (source->w & 3)
remainder=4-(source->w&3);
else
remainder=0;
if (dest==NULL)
dest=(byte *)malloc(source->w*source->h);
dest_ptr=dest;
src=(byte *)(source->pixels);
for(y=0; y < source->h; y++)
{
memcpy(dest_ptr, src,source->w);
dest_ptr += source->w;
src += source->w + remainder;
}
return dest;
}
// Convertit un index de palette en couleur RGB 24 bits
SDL_Color Color_to_SDL_color(byte index)
{
SDL_Color color;
color.r = Main_palette[index].R;
color.g = Main_palette[index].G;
color.b = Main_palette[index].B;
color.unused = 255;
return color;
}
// Lecture d'un pixel pour une surface SDL.
// Attention, ne fonctionne que pour les surfaces 8-bit
byte Get_SDL_pixel_8(SDL_Surface *bmp, int x, int y)
{
return ((byte *)(bmp->pixels))[(y*bmp->pitch+x)];
}