122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
/********************************************************
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** FILENAME : playfield.c **
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** AUTHOR : Jason Bou-Samra **
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** : Paragon **
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** DATE : 09/01/2023 **
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** DESCRIPTION: amiga 1000 playfield example **
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** NOTES : a recreation of the amiga 1000 **
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** playfield example in C/SDL **
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** CHANGES : see changes.txt **
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********************************************************/
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/* to compile: cc playfield.c -lSDL2 -lm */
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#include <stdio.h>
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#include <SDL2/SDL.h>
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#include <math.h>
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#include <stdbool.h>
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int initSDL (void);
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int shutdownSDL (void);
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int do_playfield(void);
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bool quit = false; /* quit flag */
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SDL_Window *window = NULL;
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SDL_Renderer *sr;
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SDL_Event event;
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int p1x, p2x, line;
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/* window paramaters */
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#define WIDTH 640 /* pixels */
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#define HEIGHT 512 /* pixels */
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#define TITLE "Playfield Example" /* window title */
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int main (void)
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{
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initSDL ();
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SDL_RenderSetScale (sr, 2.0, 2.0); /* scale x2 */
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while (quit == false)
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{
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while (SDL_PollEvent (&event))
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{
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if (event.type == SDL_QUIT || event.type == SDL_WINDOWEVENT_CLOSE)
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{
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quit = true;
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}
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}
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if (quit)
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{
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break;
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}
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do_playfield();
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SDL_Delay(50);
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}
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shutdownSDL (); /* bye */
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}
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/* initialise SDL */
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int initSDL ()
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{
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SDL_Init (SDL_INIT_EVERYTHING);
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/* new window */
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window = SDL_CreateWindow (TITLE, /* title */
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SDL_WINDOWPOS_UNDEFINED, /* x pos */
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SDL_WINDOWPOS_UNDEFINED, /* w pos */
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WIDTH, /* width */
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HEIGHT, /* height */
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0); /* Additional flag(s) */
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/* deal with error */
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if (window == NULL)
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{
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fprintf (stderr, "SDL window failed to initialise: %s\n",
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SDL_GetError ());
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return 1;
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}
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/* creater renderer */
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sr = SDL_CreateRenderer (window, 0, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
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}
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/* shutdown routine */
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int shutdownSDL ()
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{
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SDL_DestroyWindow (window); /* free memory */
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SDL_Quit (); /* shutdown entire sdl sub-systems */
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return 0;
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}
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int do_playfield()
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{
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SDL_SetRenderDrawColor (sr, 0xFF, 0x00, 0x00, 0xFF); /* background */
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SDL_RenderClear (sr);
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SDL_SetRenderDrawColor (sr, 0xFF, 0xFF, 0x00, 0xFF); /* set pen colour*/
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line=0;
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for (int i=0; i<200; i++) // 200 lines
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{
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p1x=0; p2x=7;
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for (int j=0; j<20; j++) // #FF00FF00 recreate pattern
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{
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SDL_RenderDrawLine (sr, p1x, line, p2x, line);
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p2x=p2x+16;
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p1x=p1x+16;
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// printf("%i %i %i\n", line, p1x, p2x);
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}
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line=line+1;
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}
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SDL_RenderPresent (sr);
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}
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/* author*/
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char author[] = { "amiga 1000 playfield example" };
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const char* text = "by commodore amiga inc.";
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