285 lines
6.4 KiB
C
285 lines
6.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <SDL/SDL.h>
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#define CELLW 12
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#define CELLH 10
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#define XRES 800
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#define YRES 600
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char xsize=CELLW, ysize=CELLH;
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char base=7, top=2;
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char font[256][CELLH][CELLW];
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char width[256];
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void blendpixel(unsigned *vid, int x, int y, int r, int g, int b, int a)
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{
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int t;
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if(x<0 || y<0 || x>=XRES || y>=YRES)
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return;
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if(a!=255) {
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t = vid[y*XRES+x];
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r = (a*r + (255-a)*((t>>16)&255)) >> 8;
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g = (a*g + (255-a)*((t>>8)&255)) >> 8;
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b = (a*b + (255-a)*(t&255)) >> 8;
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}
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vid[y*XRES+x] = (r<<16)|(g<<8)|b;
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}
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int drawchar(unsigned *vid, int x, int y, int c, int r, int g, int b)
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{
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int i, j;
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for(j=0; j<CELLH; j++)
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for(i=0; i<width[c]; i++)
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blendpixel(vid, x+i, y+j, r, g, b, (font[c][j][i]*255)/3);
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return x + width[c];
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}
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int drawtext(unsigned *vid, int x, int y, char *s, int r, int g, int b)
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{
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for(;*s;s++)
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x = drawchar(vid, x, y, *s, r, g, b);
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return x;
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}
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void drawline(unsigned *vid, int x1, int y1, int x2, int y2, int r, int g, int b, int a)
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{
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int cp=abs(y2-y1)>abs(x2-x1), x, y, dx, dy, sy;
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float e, de;
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if(cp) {
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y = x1;
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x1 = y1;
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y1 = y;
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y = x2;
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x2 = y2;
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y2 = y;
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}
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if(x1 > x2) {
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y = x1;
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x1 = x2;
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x2 = y;
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y = y1;
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y1 = y2;
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y2 = y;
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}
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dx = x2 - x1;
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dy = abs(y2 - y1);
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e = 0.0f;
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de = dy/(float)dx;
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y = y1;
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sy = (y1<y2) ? 1 : -1;
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for(x=x1; x<=x2; x++) {
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if(cp)
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blendpixel(vid, y, x, r, g, b, a);
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else
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blendpixel(vid, x, y, r, g, b, a);
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e += de;
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if(e >= 0.5f) {
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y += sy;
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e -= 1.0f;
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}
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}
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}
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void drawcell(unsigned *vid, int i, int j, int c, int m)
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{
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int x,y,x0=i*32+64,y0=j*32+64;
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for(y=1;y<32;y++)
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for(x=1;x<32;x++)
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blendpixel(vid, x0+x, y0+y, 127*m, 127*m, 127*m, c);
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for(x=0;x<32;x+=2) {
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if(!j)
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blendpixel(vid, x0+x, y0, 64*m, 64*m, 64*m, 255);
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if(!i)
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blendpixel(vid, x0, y0+x, 64*m, 64*m, 64*m, 255);
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blendpixel(vid, x0+x, y0+32, 64*m, 64*m, 64*m, 255);
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blendpixel(vid, x0+32, y0+x, 64*m, 64*m, 64*m, 255);
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}
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}
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/***********************************************************
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* SDL OUTPUT *
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***********************************************************/
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SDL_Surface *sdl_scrn;
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int sdl_key;
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void sdl_open(void)
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{
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if(SDL_Init(SDL_INIT_VIDEO)<0) {
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fprintf(stderr, "Initializing SDL: %s\n", SDL_GetError());
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exit(1);
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}
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atexit(SDL_Quit);
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sdl_scrn=SDL_SetVideoMode(XRES*SCALE,YRES*SCALE + 40*SCALE,32,SDL_SWSURFACE);
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if(!sdl_scrn) {
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fprintf(stderr, "Creating window: %s\n", SDL_GetError());
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exit(1);
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}
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}
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void sdl_blit(int x, int y, int w, int h, unsigned int *src, int pitch)
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{
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unsigned *dst,i,j,k;
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if(SDL_MUSTLOCK(sdl_scrn))
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if(SDL_LockSurface(sdl_scrn)<0)
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return;
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dst=(unsigned *)sdl_scrn->pixels+y*sdl_scrn->pitch/4+x;
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for(j=0;j<h;j++) {
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for(k=0;k<SCALE;k++) {
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for(i=0;i<w*SCALE;i++)
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dst[i]=src[i/SCALE];
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dst+=sdl_scrn->pitch/4;
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}
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src+=pitch/4;
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}
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if(SDL_MUSTLOCK(sdl_scrn))
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SDL_UnlockSurface(sdl_scrn);
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SDL_UpdateRect(sdl_scrn,0,0,0,0);
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}
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int frame_idx=0;
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void dump_frame(unsigned int *src, int w, int h, int pitch)
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{
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char frame_name[32];
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unsigned j,i,c;
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FILE *f;
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sprintf(frame_name,"frame%04d.ppm",frame_idx);
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f=fopen(frame_name,"w");
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fprintf(f,"P6\n%d %d\n255\n",w,h);
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for(j=0;j<h;j++) {
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for(i=0;i<w;i++) {
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c=((src[i]&0xFF0000)>>16)|(src[i]&0x00FF00)|((src[i]&0x0000FF)<<16);
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fwrite(&c,3,1,f);
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}
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src+=pitch/4;
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}
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fclose(f);
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frame_idx++;
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}
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int sdl_poll(void)
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{
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SDL_Event event;
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sdl_key=0;
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while(SDL_PollEvent(&event)) {
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switch (event.type) {
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case SDL_KEYDOWN:
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sdl_key=event.key.keysym.sym;
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break;
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case SDL_QUIT:
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return 1;
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}
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}
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return 0;
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}
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/***********************************************************
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* MAIN PROGRAM *
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***********************************************************/
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char *tag = "(c) 2008 Stanislaw Skowronek";
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int main(int argc, char *argv[])
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{
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unsigned *vid_buf = calloc(XRES*YRES, sizeof(unsigned));
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int x, y, b = 0, lb, c = 0xA0, i, j, dc = 0;
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int mode = 0;
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FILE *f;
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f = fopen("font.bin", "r");
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if(f) {
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fread(&xsize, 1, 1, f);
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fread(&ysize, 1, 1, f);
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fread(&base, 1, 1, f);
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fread(&top, 1, 1, f);
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fread(width, 1, 256, f);
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fread(font, CELLW*CELLH, 256, f);
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fclose(f);
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}
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sdl_open();
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while(!sdl_poll()) {
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if(sdl_key=='q' || sdl_key==SDLK_ESCAPE)
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break;
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if(sdl_key==' ' || sdl_key=='=') {
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c++;
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printf("Current: %02X '%c'\n", c, c);
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}
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if(sdl_key=='\b' || sdl_key=='-') {
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c--;
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printf("Current: %02X '%c'\n", c, c);
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}
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lb = b;
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b = SDL_GetMouseState(&x, &y);
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if(b) {
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x /= SCALE;
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y /= SCALE;
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}
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i = x/32-2;
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j = y/32-2;
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if(!lb && b && (i<0 || i>=CELLW)) {
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if(abs(j-base) < abs(j-top))
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mode = 2; // BASE
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else
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mode = 3; // TOP
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} else if(!lb && b && (j<0 || j>=CELLH))
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mode = 4; // LEFT
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else if(!lb && b) {
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mode = 1; // DRAW
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if(b==1)
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dc = (font[c][j][i]+3)%4;
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else
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dc = (font[c][j][i]+1)%4;
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}
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if(b)
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switch(mode) {
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case 1:
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if(i>=0 && j>=0 && i<CELLW && j<CELLH)
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font[c][j][i] = dc;
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break;
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case 2:
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base = j;
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break;
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case 3:
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top = j;
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break;
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case 4:
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width[c] = i;
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break;
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}
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memset(vid_buf, 0, XRES*YRES*4);
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for(j=0; j<CELLH; j++)
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for(i=0; i<CELLW; i++)
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drawcell(vid_buf, i, j, (font[c][j][i]*255)/3, i>=width[c]?1:2);
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drawline(vid_buf, 32, 64+base*32, 128+32*CELLW, 64+base*32, 128, 255, 128, 255);
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drawline(vid_buf, 32, 64+top*32, 128+32*CELLW, 64+top*32, 128, 128, 255, 255);
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drawline(vid_buf, 64+width[c]*32, 32, 64+width[c]*32, 128+32*CELLH, 255, 128, 128, 255);
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drawtext(vid_buf, 64, 192+32*CELLH, "A quick brown fox jumps over the lazy dog.", 255, 255, 255);
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drawtext(vid_buf, 64, 192+33*CELLH, "A QUICK BROWN FOX JUMPS OVER THE LAZY DOG.", 255, 255, 255);
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drawtext(vid_buf, 64, 192+34*CELLH, "0123456789 ~`!@#$%^&*()-=_+[]{}\\|;:'\",./<>?", 255, 255, 255);
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drawchar(vid_buf, 32, 192+32*CELLH, c, 255, 255, 255);
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sdl_blit(0, 0, XRES, YRES, vid_buf, XRES*4);
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}
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f = fopen("font.bin", "w");
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fwrite(&xsize, 1, 1, f);
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fwrite(&ysize, 1, 1, f);
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fwrite(&base, 1, 1, f);
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fwrite(&top, 1, 1, f);
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fwrite(width, 1, 256, f);
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fwrite(font, CELLW*CELLH, 256, f);
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fclose(f);
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return 0;
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}
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