diff options
| -rw-r--r-- | main.ha | 86 | ||||
| -rw-r--r-- | spec | 1 |
2 files changed, 69 insertions, 18 deletions
@@ -5,6 +5,7 @@ export fn main() void = { sdl2::SDL_Init(sdl2::SDL_INIT_VIDEO)!; defer sdl2::SDL_Quit(); + const win = sdl2::SDL_CreateWindow("hi", sdl2::SDL_WINDOWPOS_UNDEFINED, sdl2::SDL_WINDOWPOS_UNDEFINED, 640, 480, sdl2::SDL_WindowFlags::NONE)!; defer sdl2::SDL_DestroyWindow(win); @@ -18,45 +19,94 @@ export fn main() void = { sdl2::SDL_MapRGB(format, 0, 255, 0), sdl2::SDL_MapRGB(format, 0, 0, 255))!; fmt::println(wsurf.w * wsurf.h)!; + fmt::println(sdl2::SDL_GetPixelFormatName(format.format))!; - const pixels = (wsurf.pixels as *opaque: *[*]u32)[..wsurf.w * wsurf.h]; - + const pic = picture_from_surface(wsurf); let quit = false; let n = 0z; + let lasttime = sdl2::SDL_GetTicks(); + let drawing = false; + let mousex = 0; + let mousey = 0; for (!quit) { let ev = sdl2::event { ... }; for (sdl2::SDL_PollEvent(&ev)! == 1) switch (ev.event_type) { case sdl2::SDL_EventType::QUIT => quit = true; - case sdl2::SDL_EventType::KEYDOWN => { + case sdl2::SDL_EventType::KEYDOWN => const keysym = ev.key.keysym.sym; if (keysym == sdl2::SDL_Keycode::ESCAPE) quit = true; - fmt::println("got key", keysym: int)!; - }; + case sdl2::SDL_EventType::MOUSEBUTTONDOWN, + sdl2::SDL_EventType::MOUSEBUTTONUP => + const d = ev.button; + mousex = d.x; + mousey = d.y; + if (d.button == 1) + drawing = (d.state == 1); + case sdl2::SDL_EventType::MOUSEMOTION => + const d = ev.motion; + mousex = d.x; + mousey = d.y; case => void; }; - for (let i = 0z; i < 100; i+=1) { - pixels[n] = sdl2::SDL_MapRGB(format, 0, 255, 0); - n += 1; - }; + if (drawing) circle(pic, mousex, mousey, 25, 0x00ffff); + + // circle(pic, 100, 100, n:int, 0xff0000); sdl2::SDL_UpdateWindowSurface(win)!; - sdl2::SDL_Delay(1000 / 60); + n += 1; + sdl2::SDL_Delay(1000/60); + + // if (n % 100 == 0) { + // const thistime = sdl2::SDL_GetTicks(); + // const dt = (thistime - lasttime): f64; + // lasttime = thistime; + // const dt = dt / 100.0; + // const fps = 1000.0/dt; + // fmt::printfln("fps: {}",fps)!; + // }; + }; +}; - // sdl2::SDL_SetRenderDrawColor(render, 50, 50, 50, 255)!; - // sdl2::SDL_RenderClear(render)!; +def WHITE = 0x556602; +def BLACK = 0x0; - // rect.x = (sdl2::SDL_GetTicks(): int)/100; - // sdl2::SDL_SetRenderDrawColor(render, 255, 0, 0, 0)!; - // sdl2::SDL_RenderFillRect(render, &rect)!; +type picture = struct { + d: []u32, + w: size, + h: size, +}; +fn pidx(pic: picture, x: size, y: size) size = (pic.w*y)+x; +fn pic_set(pic: picture, x: size, y: size, val: u32) void = pic.d[pidx(pic,x,y)] = val; +fn picture_from_surface(surf: *sdl2::SDL_Surface) picture = picture { + w = surf.w: size, + h = surf.h: size, + d = (surf.pixels as *opaque: *[*]u32)[..surf.w*surf.h], +}; - // sdl2::SDL_RenderPresent(render); - // sdl2::SDL_Delay(1000 / 60); - }; +fn min(a: int, b: int) int = if (a<b) a else b; +fn max(a: int, b: int) int = if (a<b) b else a; +fn circle(pic: picture, cx: int, cy: int, r: int, color: u32) void = { + const ymin = max(0, cy-r); + const ymax = min(pic.h:int-1, cy+r); + const xmin = max(0, cx-r); + const xmax = min(pic.w:int-1, cx+r); + const r2 = r*r + r; + for (let y = ymin; y<=ymax; y+=1) { + const yd = y-cy; + for (let x = xmin; x<=xmax; x+=1) { + const xd = x-cx; + if (yd*yd + xd*xd <= r2) { + // we already made sure x and y are both greater than 0 + pic_set(pic, x:size, y:size, color); + }; + }; + }; }; + @@ -1,4 +1,5 @@ program where you can draw with the mouse + DONE program where you can draw with the mouse and it draws lines between the points program where you can draw with the mouse and it interpolates nicely with beziers program where you can do that multiplayerly |