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comparison temp-c-stuff @ 485:cd6a96a07d2e

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added reference c program for converting vga rgb to vb rgb.
author Robert McIntyre <rlm@mit.edu>
date Sun, 06 May 2012 20:54:09 -0500
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484:f6b5a1914efa 485:cd6a96a07d2e
1 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2
3
4 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
5
6
7 // This section of code is used to convert an RGB (pc) triplet into a RGB (gameboy)
8 // triplet. This section of code was kindly donated by Brett Bibby (GameBrains).
9
10 BYTE intensity[32] =
11 {
12 0x00,0x10,0x20,0x30,0x40,0x50,0x5e,0x6c,0x7a,0x88,0x94,0xa0,0xae,0xb7,0xbf,0xc6,
13 0xce,0xd3,0xd9,0xdf,0xe3,0xe7,0xeb,0xef,0xf3,0xf6,0xf9,0xfb,0xfd,0xfe,0xff,0xff
14 };
15
16 unsigned char influence[3][3] =
17 {
18 {16,4,4},
19 {8,16,8},
20 {0,8,16}
21 };
22
23 RGBQUAD translate(BYTE rgb[3])
24 {
25 RGBQUAD color;
26 BYTE tmp[3];
27 BYTE m[3][3];
28 BYTE i,j;
29
30 for (i=0;i<3;i++)
31 for (j=0;j<3;j++)
32 m[i][j] = (intensity[rgb[i]>>3]*influence[i][j]) >> 5;
33
34 for (i=0;i<3;i++)
35 {
36 if (m[0][i]>m[1][i])
37 {
38 j=m[0][i];
39 m[0][i]=m[1][i];
40 m[1][i]=j;
41 }
42
43 if (m[1][i]>m[2][i])
44 {
45 j=m[1][i];
46 m[1][i]=m[2][i];
47 m[2][i]=j;
48 }
49
50 if (m[0][i]>m[1][i])
51 {
52 j=m[0][i];
53 m[0][i]=m[1][i];
54 m[1][i]=j;
55 }
56
57 tmp[i]=(((m[0][i]+m[1][i]*2+m[2][i]*4)*5) >> 4)+32;
58 }
59
60 color.rgbRed = tmp[0];
61 color.rgbGreen = tmp[1];
62 color.rgbBlue = tmp[2];
63
64 return color;
65 }
66
67
68
69
70
71 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
72