diff options
author | erdgeist <> | 2003-05-13 12:05:12 +0000 |
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committer | erdgeist <> | 2003-05-13 12:05:12 +0000 |
commit | 866f0ad8030ea2ceea22a4d61e6ff0006546c3fa (patch) | |
tree | 54f3af1248bce246e1dd92b196b818271d21f2f6 /Gfx.c |
Here we go
Diffstat (limited to 'Gfx.c')
-rwxr-xr-x | Gfx.c | 65 |
1 files changed, 65 insertions, 0 deletions
@@ -0,0 +1,65 @@ | |||
1 | #include "Gfx.h" | ||
2 | #include "Kullers.h" | ||
3 | |||
4 | static void *bitmap = (void*)0; | ||
5 | unsigned long g_width, g_height; | ||
6 | unsigned long minx, miny, maxx, maxy; | ||
7 | |||
8 | void Gfx_init( void *offscreen, int width, int height ) { | ||
9 | maxx = g_width = width; | ||
10 | maxy = g_height = height; | ||
11 | bitmap = offscreen; | ||
12 | minx = miny = 0; | ||
13 | } | ||
14 | |||
15 | void Gfx_destroy( void ) { | ||
16 | // if( bitmap ) | ||
17 | // free( bitmap ); | ||
18 | } | ||
19 | |||
20 | void Gfx_clear( void ) { | ||
21 | unsigned long *dest = ((unsigned long *)bitmap) + miny * g_width + minx; | ||
22 | int nochy = maxy - miny; | ||
23 | |||
24 | while( nochy-- ) { | ||
25 | memset( dest, 0, (maxx - minx) << 2); | ||
26 | dest += g_width; | ||
27 | } | ||
28 | |||
29 | minx = g_width; miny = g_height; | ||
30 | maxx = 0; maxy = 0; | ||
31 | } | ||
32 | |||
33 | int getkulleroff( int radius ) { | ||
34 | int sum = 0; | ||
35 | while( --radius>0 ) | ||
36 | sum += radius*radius; | ||
37 | return sum; | ||
38 | } | ||
39 | |||
40 | void Gfx_kuller( int x, int y, int radius, unsigned long r, unsigned long g, unsigned long b ) { | ||
41 | unsigned long *dest = ((unsigned long *)bitmap) + y * g_width + x; | ||
42 | unsigned char *src = Kullers + getkulleroff( radius ) - 1; | ||
43 | int xoffs = g_width - radius; | ||
44 | int nochy = radius; | ||
45 | |||
46 | if( minx > x ) minx = x; | ||
47 | if( miny > y ) miny = y; | ||
48 | if( maxx < x + radius ) maxx = x + radius; | ||
49 | if( maxy < y + radius ) maxy = y + radius; | ||
50 | |||
51 | while( nochy-- >0 ) { | ||
52 | int nochx = radius; | ||
53 | while( nochx-- >0 ) { | ||
54 | if( *(++src) ) { | ||
55 | int this_r = ((r * (int)*src) >> 8); | ||
56 | int this_g = ((g * (int)*src) >> 8); | ||
57 | int this_b = ((b * (int)*src) >> 8); | ||
58 | *(dest++) = (this_r<<16) | (this_g<<8) | this_b; | ||
59 | } else { | ||
60 | dest++; | ||
61 | } | ||
62 | } | ||
63 | dest += xoffs; | ||
64 | } | ||
65 | } | ||