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/*! |
\file Draw_FillCircle.c |
\author Mario Palomo <mpalomo@ihman.com> |
\author Jose M. de la Huerga Fernández |
\author Pepe González Mora |
\date 05-2002 |
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This library is free software; you can redistribute it and/or |
modify it under the terms of the GNU Library General Public |
License as published by the Free Software Foundation; either |
version 2 of the License, or (at your option) any later version. |
|
This library is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
Library General Public License for more details. |
|
You should have received a copy of the GNU Library General Public |
License along with this library; if not, write to the Free Foundation, |
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
*/ |
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#if SDL_DRAW_BPP == 1 |
#define SDL_DRAW_PUTPIXEL \ |
memset(p0, color, 2*x+1); \ |
memset(p1, color, 2*x+1); \ |
p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)); \ |
p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)); \ |
memset(p0, color, 2*y+1); \ |
memset(p1, color, 2*y+1); |
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#elif SDL_DRAW_BPP == 2 |
#define SDL_DRAW_PUTPIXEL \ |
i = 2*x+1; \ |
switch( i % 4 ) { \ |
do{ \ |
case 0: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
p0+=2; p1+=2; \ |
case 3: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
p0+=2; p1+=2; \ |
case 2: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
p0+=2; p1+=2; \ |
case 1: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
p0+=2; p1+=2; \ |
}while( (i-=4) > 0 ); \ |
} \ |
p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)*2); \ |
p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)*2); \ |
i = 2*y+1; \ |
switch( i % 4 ) { \ |
do{ \ |
case 0: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
p0+=2; p1+=2; \ |
case 3: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
p0+=2; p1+=2; \ |
case 2: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
p0+=2; p1+=2; \ |
case 1: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
p0+=2; p1+=2; \ |
}while( (i-=4) > 0 ); \ |
} |
|
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#elif SDL_DRAW_BPP == 3 |
#define SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
if (SDL_BYTEORDER == SDL_BIG_ENDIAN) { \ |
p0[0] = colorbyte2; \ |
p0[1] = colorbyte1; \ |
p0[2] = colorbyte0; \ |
p1[0] = colorbyte2; \ |
p1[1] = colorbyte1; \ |
p1[2] = colorbyte0; \ |
} else { \ |
p0[0] = colorbyte0; \ |
p0[1] = colorbyte1; \ |
p0[2] = colorbyte2; \ |
p1[0] = colorbyte0; \ |
p1[1] = colorbyte1; \ |
p1[2] = colorbyte2; \ |
} |
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#define SDL_DRAW_PUTPIXEL \ |
i = 2*x+1; \ |
switch( i % 4 ) { \ |
do{ \ |
case 0: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
p0+=3; p1+=3; \ |
case 3: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
p0+=3; p1+=3; \ |
case 2: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
p0+=3; p1+=3; \ |
case 1: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
p0+=3; p1+=3; \ |
}while( (i-=4) > 0 ); \ |
} \ |
p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)*3); \ |
p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)*3); \ |
i = 2*y+1; \ |
switch( i % 4 ) { \ |
do{ \ |
case 0: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
p0+=3; p1+=3; \ |
case 3: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
p0+=3; p1+=3; \ |
case 2: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
p0+=3; p1+=3; \ |
case 1: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
p0+=3; p1+=3; \ |
}while( (i-=4) > 0 ); \ |
} |
|
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#elif SDL_DRAW_BPP == 4 |
|
#ifdef __linux__ |
#define SDL_DRAW_WMEMSET_START \ |
if (sizeof(wchar_t) == sizeof(Uint32)) { \ |
wmemset((wchar_t*)p0, color, 2*x+1); \ |
wmemset((wchar_t*)p1, color, 2*x+1); \ |
p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)*4); \ |
p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)*4); \ |
wmemset((wchar_t*)p0, color, 2*y+1); \ |
wmemset((wchar_t*)p1, color, 2*y+1); \ |
} else { |
#define SDL_DRAW_WMEMSET_END } |
#else |
#define SDL_DRAW_WMEMSET_START |
#define SDL_DRAW_WMEMSET_END |
#endif |
|
#define SDL_DRAW_PUTPIXEL \ |
SDL_DRAW_WMEMSET_START \ |
i = 2*x+1; \ |
switch( i % 4 ) { \ |
do{ \ |
case 0: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
p0+=4; p1+=4; \ |
case 3: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
p0+=4; p1+=4; \ |
case 2: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
p0+=4; p1+=4; \ |
case 1: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
p0+=4; p1+=4; \ |
}while( (i-=4) > 0 ); \ |
} \ |
p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)*4); \ |
p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)*4); \ |
i = 2*y+1; \ |
switch( i % 4 ) { \ |
do{ \ |
case 0: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
p0+=4; p1+=4; \ |
case 3: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
p0+=4; p1+=4; \ |
case 2: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
p0+=4; p1+=4; \ |
case 1: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
p0+=4; p1+=4; \ |
}while( (i-=4) > 0 ); \ |
} \ |
SDL_DRAW_WMEMSET_END |
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#endif /*SDL_DRAW_BPP*/ |
|
|
|
void SDL_DRAWFUNCTION(SDL_Surface *super, |
Sint16 x0, Sint16 y0, Uint16 r, |
Uint32 color) |
{ |
#if SDL_DRAW_BPP == 3 |
Uint8 colorbyte0 = (Uint8) (color & 0xff); |
Uint8 colorbyte1 = (Uint8) ((color >> 8) & 0xff); |
Uint8 colorbyte2 = (Uint8) ((color >> 16) & 0xff); |
#endif |
|
register Uint8 *p0; |
register Uint8 *p1; |
#if SDL_DRAW_BPP != 1 |
register Sint16 i; |
#endif |
|
Sint16 x = 0; |
Sint16 y = r-1; /*radius zero == draw nothing*/ |
Sint16 d = 3 - 2*r; |
Sint16 diagonalInc = 10 - 4*r; |
Sint16 rightInc = 6; |
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while (x <= y) { |
|
p0 = ((Uint8*)super->pixels+ (y0+y)*super->pitch+ (x0-x)*SDL_DRAW_BPP); |
p1 = ((Uint8*)super->pixels+ (y0-y)*super->pitch+ (x0-x)*SDL_DRAW_BPP); |
|
SDL_DRAW_PUTPIXEL |
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if (d >= 0) { |
d += diagonalInc; |
diagonalInc += 8; |
y -= 1; |
} else { |
d += rightInc; |
diagonalInc += 4; |
} |
rightInc += 4; |
x += 1; |
} |
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}/*Draw_FillCircle*/ |
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#undef SDL_DRAW_PUTPIXEL |
#undef SDL_DRAW_PUTPIXEL_BPP_3_AUX |
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#undef SDL_DRAW_WMEMSET_START |
#undef SDL_DRAW_WMEMSET_END |
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