mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-05 10:18:22 +02:00
121 lines
1.9 KiB
ObjectPascal
121 lines
1.9 KiB
ObjectPascal
{ %skiptarget=android }
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{ %CPU=i386 }
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{ %OPT=-Cg- }
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{ Source provided for Free Pascal Bug Report 1066 }
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{ Submitted by "Fernando Oscar Schmitt" on 2000-07-24 }
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{ e-mail: pulp@cpovo.net }
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var
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somevar:longint;
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{$asmmode intel}
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{$inline on}
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procedure putpixel(x,y,color:longint);assembler;inline;
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asm
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mov edi,x
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mov eax,y
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cmp edi,0
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jl @@putpixelend
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cmp eax,0
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jl @@putpixelend
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cmp edi,1023
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jg @@putpixelend
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cmp eax,767
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jg @@putpixelend
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shl eax,12
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mov ebx,color
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add eax,somevar
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mov [eax+edi*4],ebx
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@@putpixelend:
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end ['eax','ebx','edi'];
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procedure pixelrow(y,x1,x2,color:longint);assembler;inline;
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asm
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mov edi,x1
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mov ecx,x2
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mov eax,y
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cmp edi,ecx
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jle @@pixelrowdirok
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xchg edi,ecx
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@@pixelrowdirok:
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cmp eax,0
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jl @@endpixelrow
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cmp eax,767
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jg @@endpixelrow
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cmp ecx,0
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jl @@endpixelrow
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cmp edi,1023
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jg @@endpixelrow
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cmp edi,0
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jge @@pixelrowx1ok
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mov edi,0
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@@pixelrowx1ok:
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cmp ecx,1023
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jle @@pixelrowx2ok
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mov ecx,1023
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@@pixelrowx2ok:
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sub ecx,edi
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shl eax,12
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inc ecx
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add eax,somevar
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cld
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lea edi,[eax+4*edi]
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mov eax,color
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rep stosd
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@@endpixelrow:
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end ['eax','ecx','edi'];
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function str(w:word):string;
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var tmp:string;
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begin
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system.str(w,tmp);
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str:=tmp;
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end;
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function str(l:longint):string;
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var tmp:string;
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begin
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system.str(l,tmp);
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str:=tmp;
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end;
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procedure circle(x0,y0,r,color:longint);
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var x,y:longint;
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begin
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for x:=0 to trunc(r*(sqrt(2)/2))+1 do
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begin
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y:=round(sqrt(r*r-x*x));
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putpixel(x0+x,y0+y,color);
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putpixel(x0-x,y0+y,color);
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putpixel(x0+x,y0-y,color);
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putpixel(x0-x,y0-y,color);
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putpixel(x0+y,y0+x,color);
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putpixel(x0-y,y0+x,color);
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putpixel(x0+y,y0-x,color);
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putpixel(x0-y,y0-x,color);
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end;
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end;
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procedure circlefill(x0,y0,r,color:longint);
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var x,y:longint;
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begin
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for x:=0 to trunc(r*(sqrt(2)/2))+1 do
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begin
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y:=round(sqrt(r*r-x*x));
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pixelrow(y0+y,x0-x,x0+x,color);
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pixelrow(y0-y,x0-x,x0+x,color);
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pixelrow(y0+x,x0-y,x0+y,color);
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pixelrow(y0-x,x0-y,x0+y,color);
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end;
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end;
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begin
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end.
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