Mercurial > projects > ldc
view demos/qd.d @ 41:835320b88ad6 trunk
[svn r45] Added a modified version of scrapple.qd (by downs) to the demos dir. It doesn't compile yet though :(
author | lindquist |
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date | Fri, 19 Oct 2007 07:45:35 +0200 |
parents | |
children | b706170e24a9 |
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// modified version of scrapple.qd to work with llvmdc import std.stdio; //version(none) void main() { screen(640, 480); pset(10, 10); line(0, 0, 100, 100, Box, Back(Red~Black)); for (int i=0; i<=100; i+=10) { line(i, 0, 100-i, 100); line(0, i, 100, 100-i); } circle(100, 100, 50, 15, White~Black, Fill=White~Black); paint(200, 200, Red, Back=White); circle(100, 100, 50, 15, White); paint(200, 200, Black); pset(10, 11); pset(10, 11, Black); pset(10, 10); SDL_Delay(5000); } extern(C) { struct SDL_Rect { short x, y; ushort w, h; } struct SDL_PixelFormat { //SDL_Palette *palette; void *palette; ubyte BitsPerPixel, BytesPerPixel, Rloss, Gloss, Bloss, Aloss, Rshift, Gshift, Bshift, Ashift; uint Rmask, Gmask, Bmask, Amask, colorkey; ubyte alpha; } struct SDL_Surface { uint flags; SDL_PixelFormat *format; int w, h; ushort pitch; void *pixels; int offset; void *hwdata; SDL_Rect clip_rect; uint unused; uint locked; void *map; uint format_version; int refcount; } uint SDL_MapRGBA(SDL_PixelFormat *format, ubyte r, ubyte g, ubyte b, ubyte a); void SDL_GetRGBA(uint pixel, SDL_PixelFormat *fmt, ubyte *r, ubyte *g, ubyte *b, ubyte *a); int SDL_LockSurface(SDL_Surface *); void SDL_UnlockSurface(SDL_Surface *); SDL_Surface * SDL_SetVideoMode(int width, int height, int bpp, uint flags); int SDL_Flip(SDL_Surface *); void SDL_Delay(uint); const uint SDL_SWSURFACE=0; const uint SDL_HWSURFACE=1; const uint SDL_DOUBLEBUF=0x40000000; const uint SDL_FULLSCREEN=0x80000000; } SDL_Surface *display; void putpixel32(SDL_Surface *surf, int x, int y, ubyte[4] col) { uint *bufp = cast(uint *)surf.pixels + y*surf.pitch/4 + x; *bufp = SDL_MapRGBA(surf.format, col[0], col[1], col[2], col[3]); } void getpixel32(SDL_Surface *surf, int x, int y, ubyte[4] *col) { uint *bufp = cast(uint *)surf.pixels + y*surf.pitch/4 + x; SDL_GetRGBA(*bufp, surf.format, &(*col)[0], &(*col)[1], &(*col)[2], &(*col)[3]); } struct rgb { ubyte[3] values; rgb opCat(rgb other) { rgb res; foreach (id, ref v; res.values) v=(values[id]+other.values[id])/2; return res; } bool opEquals(rgb r) { return values == r.values; } } void putpixel(SDL_Surface *surf, int x, int y, rgb c) { if ( (x<0) || (y<0) || (x!<surf.w) || (y!<surf.h) ) return; putpixel32(surf, x, y, [c.values[0], c.values[1], c.values[2], 0]); } const rgb White={[255, 255, 255]}; const rgb Black={[0, 0, 0]}; const rgb Red={[255, 0, 0]}; const rgb Green={[0, 255, 0]}; const rgb Blue={[0, 0, 255]}; rgb color=White; rgb back=Black; template failfind(U, T...) { static if (T.length) static if (is(T[0] == U)) static assert(false, "Duplicate "~U.stringof~" found!"); else const bool failfind=failfind!(U, T[1..$]); else const bool failfind=true; } template select(U, T...) { static if(T.length) static if (is(U == T[0])) { static if (failfind!(U, T[1..$])) { }; const int select = 0; } else static if (select!(U, T[1..$]) != -1) const int select = 1 + select!(U, T[1..$]); else const int select = -1; else const int select = -1; } typedef rgb back_rgb; back_rgb Back(rgb r) { return cast(back_rgb) r; } back_rgb Back() { return cast(back_rgb) back; } typedef rgb box_rgb; box_rgb Box(rgb r) { return cast(box_rgb) r; } box_rgb Box() { return cast(box_rgb) color; } alias Back Fill; void execParams(T...)(T params) { const int col=select!(rgb, T); static if (col != -1) color=params[col]; const int bcol=select!(back_rgb, T); static if (bcol != -1) back=cast(rgb) params[bcol]; const int boxcol=select!(box_rgb, T); static if (boxcol != -1) color=cast(rgb) params[boxcol]; } void pset(T...)(int x, int y, T params) { SDL_LockSurface(display); scope(exit) { SDL_UnlockSurface(display); SDL_Flip(display); } execParams(params); putpixel(display, x, y, color); } rgb pget(int x, int y) { SDL_LockSurface(display); scope(exit) SDL_UnlockSurface(display); ubyte[4] c; getpixel32(display, x, y, &c); rgb res; res.values[]=c[0..3]; return res; } void swap(T)(ref T a, ref T b) { T c=a; a=b; b=c; } T abs(T)(T f) { return f < 0 ? -f : f; } void bresenham(bool countUp=true, bool steep=false)(int x0, int y0, int x1, int y1) { auto deltax = x1 - x0, deltay = y1 - y0; static if (steep) { auto Δerror = cast(float)deltax / cast(float)deltay; auto var2 = x0; const string name="y"; } else { auto Δerror = cast(float)deltay / cast(float)deltax; auto var2 = y0; const string name="x"; } auto error = 0f; for (auto var1 = mixin(name~'0'); var1 <= mixin(name~'1'); ++var1) { static if (steep) putpixel(display, var2, var1, color); else putpixel(display, var1, var2, color); error += Δerror; if (abs(error) >= 1f) { static if (countUp) { var2++; error -= 1f; } else { var2--; error += 1f; }} } } T max(T)(T a, T b) { return a>b?a:b; } T min(T)(T a, T b) { return a<b?a:b; } void line(T...)(int x0, int y0, int x1, int y1, T p) { execParams(p); static if (select!(back_rgb, T)!=-1) { SDL_LockSurface(display); scope(exit) { SDL_UnlockSurface(display); SDL_Flip(display); } auto xend=max(x0, x1); for (int x=min(x0, x1); x<=xend; ++x) { auto yend=max(y0, y1); for (int y=min(y0, y1); y<=yend; ++y) { putpixel(display, x, y, back); } } } static if (select!(box_rgb, T)!=-1) { line(x0, y0, x1, y0); line(x1, y0, x1, y1); line(x1, y1, x0, y1); line(x0, y1, x0, y0); } static if (select!(box_rgb, T)+select!(back_rgb, T)==-2) { SDL_LockSurface(display); scope(exit) { SDL_UnlockSurface(display); SDL_Flip(display); } bool steep = abs(y1 - y0) > abs(x1 - x0); void turn() { swap(x0, x1); swap(y0, y1); } if (steep) { if (y1 < y0) turn; } else { if (x1 < x0) turn; } bool stepUp=steep ? (x0 < x1) : (y0 < y1); if (steep) { if (stepUp) bresenham!(true, true)(x0, y0, x1, y1); else bresenham!(false, true)(x0, y0, x1, y1); } else { if (stepUp) bresenham!(true, false)(x0, y0, x1, y1); else bresenham!(false, false)(x0, y0, x1, y1); } } } import llvm.intrinsic; alias llvm_sqrt sqrt; template circle_bresenham_pass(bool first) { const string xy=(first?"x":"y"); const string yx=(first?"y":"x"); const string str=" auto x="~(first?"xradius":"0")~"; auto y="~(first?"0":"yradius")~"; auto xchange=yradius*yradius*"~(first?"(1-2*xradius)":"1")~"; auto ychange=xradius*xradius*"~(first?"1":"(1-2*yradius)")~"; auto error=0; auto stopx="~(first?"y2square*xradius":"0")~"; auto stopy="~(first?"0":"x2square*yradius")~"; while (stopx"~(first?">=":"<=")~"stopy) { putpixel(display, cx+x, cy+y, color); putpixel(display, cx+x, cy-y, color); putpixel(display, cx-x, cy+y, color); putpixel(display, cx-x, cy-y, color); "~yx~"++; stop"~yx~"+="~xy~"2square; error+="~yx~"change; "~yx~"change+="~xy~"2square; if ((2*error+"~xy~"change)>0) { --"~xy~"; stop"~xy~"-="~yx~"2square; error+="~xy~"change; "~xy~"change+="~yx~"2square; } } "; } void circle(T...)(int cx, int cy, int xradius, T t) { SDL_LockSurface(display); scope(exit) { SDL_UnlockSurface(display); SDL_Flip(display); } execParams(t); auto yradius=xradius; static if (T.length && is(T[0]: int)) yradius=t[0]; static if (select!(back_rgb, T) != -1) { auto ratio=xradius*1f/yradius; for (int i=0; i<=yradius; ++i) { ushort j=cast(ushort)(sqrt(cast(real)(yradius*yradius-i*i))*ratio); for (int lx=cx-j; lx<=cx+j; ++lx) putpixel(display, lx, cy+i, back); for (int lx=cx-j; lx<=cx+j; ++lx) putpixel(display, lx, cy-i, back); } } auto x2square=2*xradius*xradius; auto y2square=2*yradius*yradius; { mixin(circle_bresenham_pass!(true).str); } { mixin(circle_bresenham_pass!(false).str); } } struct floodfill_node { int x, y; static floodfill_node opCall(int x, int y) { floodfill_node res; res.x=x; res.y=y; return res; } } void paint(T...)(int x, int y, T t) { SDL_LockSurface(display); scope(exit) { SDL_UnlockSurface(display); SDL_Flip(display); } execParams(t); bool border=true; if (select!(back_rgb, T) == -1) { back=pget(x, y); border=false; } bool check(rgb r) { if (border) return (r != back) && (r != color); else return r == back; } if (back == color) throw new Exception("Having identical backgrounds and foregrounds will severely mess up floodfill."); alias floodfill_node node; node[] queue; queue ~= node(x, y); size_t count=0; while (count<queue.length) { scope(exit) count++; with (queue[count]) { if (check(pget(x, y))) { int w=x, e=x; if (w<display.w) do w++; while ((w<display.w) && check(pget(w, y))); if (e>=0) do e--; while (e>=0 && check(pget(e, y))); //SDL_Flip(display); for (int i=e+1; i<w; ++i) { putpixel(display, i, y, color); if (y && check(pget(i, y-1)) && ((i==w-1)||!check(pget(i+1, y-1)))) queue ~= node(i, y-1); if ((y < display.h-1) && check(pget(i, y+1)) && ((i==w-1)||!check(pget(i+1, y+1)))) queue ~= node(i, y+1); } } } } } void screen(size_t w, size_t h) { display = SDL_SetVideoMode(w, h, 32, SDL_SWSURFACE); } void cls() { line(0, 0, display.w-1, display.h-1, Fill=Black); }