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Diffstat (limited to 'src/gfx.c')
| -rw-r--r-- | src/gfx.c | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/src/gfx.c b/src/gfx.c new file mode 100644 index 0000000..e37a211 --- /dev/null +++ b/src/gfx.c @@ -0,0 +1,290 @@ +/* + + ezx81 - X11 ZX81 emulator + + Copyright (C) 2003 Ian Cowburn (ianc@noddybox.demon.co.uk) + + This program 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; either version 2 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + ------------------------------------------------------------------------- + + Config file + +*/ +static const char ident[]="$Id$"; + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <stdarg.h> + +#include "gfx.h" +#include "exit.h" +#include "config.h" + +#include "font.h" + +static const char ident_h[]=EZX81_GFX_H; +static const char ident_fh[]=EZX81_FONT_H; + + +/* ---------------------------------------- MACROS +*/ +#ifndef TRUE +#define TRUE 1 +#endif + +#ifndef FALSE +#define FALSE 0 +#endif + +#define SCR_W 320 +#define SCR_H 200 + +#define LOCK do \ + { \ + if (SDL_MUSTLOCK(surface)) \ + if (SDL_LockSurface(surface)<0) \ + Exit("Failed to lock surface: %s\n", \ + SDL_GetError()); \ + } while(0) + +#define UNLOCK do \ + { \ + if (SDL_MUSTLOCK(surface)) \ + SDL_UnlockSurface(surface); \ + } while(0) + + +/* ---------------------------------------- STATICS +*/ +static SDL_Surface *surface; +static Uint32 ticks; +static Uint32 frame; +static int scale; + + +/* ---------------------------------------- PRIVATE FUNCTIONS +*/ + +/* Taken from SDL documentation +*/ +static void putpixel(int x, int y, Uint32 pixel) +{ + int bpp; + Uint8 *p; + + bpp=surface->format->BytesPerPixel; + p=(Uint8 *)surface->pixels+y*surface->pitch+x*bpp; + + switch(bpp) + { + case 1: + *p=pixel; + break; + + case 2: + *(Uint16 *)p=pixel; + break; + + case 3: + if(SDL_BYTEORDER==SDL_BIG_ENDIAN) + { + p[0]=(pixel>>16)&0xff; + p[1]=(pixel>>8)&0xff; + p[2]=pixel&0xff; + } else + { + p[0]=pixel&0xff; + p[1]=(pixel>>8)&0xff; + p[2]=(pixel>>16)&0xff; + } + break; + + case 4: + *(Uint32 *)p=pixel; + break; + } +} + + +static void DoHLine(int x1, int x2, int y, Uint32 col) +{ + for(;x1<=x2;x1++) + putpixel(x1,y,col); +} + + +static void DoVLine(int x, int y1, int y2, Uint32 col) +{ + for(;y1<=y2;y1++) + putpixel(x,y1,col); +} + + +/* ---------------------------------------- EXPORTED INTERFACES +*/ +void GFXInit(void) +{ + scale=IConfig(CONF_SCALE); + + if (scale<0) + scale=1; + + frame=1000/IConfig(CONF_FRAMES_PER_SEC); + + if (SDL_Init(SDL_INIT_TIMER|SDL_INIT_VIDEO)) + Exit("Failed to init SDL: %s\n",SDL_GetError()); + + if (!(surface=SDL_SetVideoMode + (SCR_W,SCR_H,0,IConfig(CONF_FULLSCREEN) ? SDL_FULLSCREEN : 0))) + Exit("Failed to open video: %s\n",SDL_GetError()); + + SDL_ShowCursor(SDL_DISABLE); + SDL_WM_SetCaption("eZX81","eZX81"); +} + + +SDL_Surface *GFXGetSurface(void) +{ + return surface; +} + + +Uint32 GFXRGB(Uint8 r, Uint8 g, Uint8 b) +{ + return SDL_MapRGB(surface->format,r,g,b); +} + + +void GFXClear(Uint32 col) +{ + SDL_FillRect(surface,NULL,col); +} + + +void GFXStartFrame(void) +{ + ticks=SDL_GetTicks(); +} + + +void GFXEndFrame(int delay) +{ + SDL_UpdateRect(surface,0,0,0,0); + + if (delay) + { + Uint32 diff; + + diff=SDL_GetTicks()-ticks; + + if (diff<frame) + SDL_Delay(frame-diff); + } +} + + +void GFXPlot(int x, int y, Uint32 col) +{ + LOCK; + + putpixel(x,y,col); + + UNLOCK; +} + + +void GFXRect(int x, int y, int w, int h, Uint32 col, int solid) +{ + LOCK; + + if (solid) + { + SDL_Rect r; + + r.x=x; + r.y=y; + r.w=w; + r.h=h; + + SDL_FillRect(surface,&r,col); + } + else + { + DoHLine(x,x+w,y,col); + DoHLine(x,x+w,y+h,col); + DoVLine(x,y,y+h,col); + DoVLine(x+w,y,y+h,col); + } + + UNLOCK; +} + + +void GFXHLine(int x1, int x2, int y, Uint32 col) +{ + LOCK; + DoHLine(x1,x2,y,col); + UNLOCK; +} + + +void GFXVLine(int x, int y1, int y2, Uint32 col) +{ + LOCK; + DoVLine(x,y1,y2,col); + UNLOCK; +} + + +void GFXPrint(int x, int y, Uint32 col, const char *format, ...) +{ + char buff[257]; + va_list va; + char *p; + int sx,sy; + + va_start(va,format); + vsprintf(buff,format,va); + va_end(va); + + p=buff; + + LOCK; + + while(*p) + { + for(sy=0;sy<8;sy++) + { + if (y+sy<SCR_H && x<SCR_W) + { + for(sx=0;sx<8;sx++) + { + if (font[(int)*p][sx+sy*8] && x+sx<SCR_W) + putpixel(x+sx,y+sy,col); + } + } + } + + p++; + x+=8; + } + + UNLOCK; +} + + +/* END OF FILE */ |