Bastien Nocera | a7bc748 | 2008-02-23 01:51:37 +0000 | [diff] [blame] | 1 | /* |
| 2 | * lines.c |
| 3 | * iTunesXPlugIn |
| 4 | * |
| 5 | * Created by guillaum on Tue Aug 14 2001. |
| 6 | * Copyright (c) 2001 __CompanyName__. All rights reserved. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #ifdef HAVE_CONFIG_H |
| 11 | #include "config.h" |
| 12 | #endif |
| 13 | |
| 14 | #include "lines.h" |
| 15 | #include <math.h> |
| 16 | |
| 17 | static inline unsigned char |
| 18 | lighten (unsigned char value, unsigned char power) |
| 19 | { |
| 20 | unsigned char i; |
| 21 | |
| 22 | for (i = 0; i < power; i++) |
| 23 | value += (255 - value) / 5; |
| 24 | return value; |
| 25 | } |
| 26 | |
| 27 | void |
| 28 | goom_lines (GoomData * goomdata, gint16 data[2][512], unsigned int ID, |
| 29 | unsigned int *p, guint32 power) |
| 30 | { |
| 31 | guint32 color1; |
| 32 | guint32 color2; |
| 33 | guint32 resolx = goomdata->resolx; |
| 34 | guint32 resoly = goomdata->resoly; |
| 35 | unsigned char *color = 1 + (unsigned char *) &color1; |
| 36 | |
| 37 | switch (ID) { |
| 38 | case 0: /* Horizontal stereo lines */ |
| 39 | { |
| 40 | color1 = 0x0000AA00; |
| 41 | color2 = 0x00AA0000; |
| 42 | break; |
| 43 | } |
| 44 | |
| 45 | case 1: /* Stereo circles */ |
| 46 | { |
| 47 | color1 = 0x00AA33DD; |
| 48 | color2 = 0x00AA33DD; |
| 49 | break; |
| 50 | } |
| 51 | } |
| 52 | *color = lighten (*color, power); |
| 53 | color++; |
| 54 | *color = lighten (*color, power); |
| 55 | color++; |
| 56 | *color = lighten (*color, power); |
| 57 | color = 1 + (unsigned char *) &color2; |
| 58 | *color = lighten (*color, power); |
| 59 | color++; |
| 60 | *color = lighten (*color, power); |
| 61 | color++; |
| 62 | *color = lighten (*color, power); |
| 63 | |
| 64 | switch (ID) { |
| 65 | case 0: /* Horizontal stereo lines */ |
| 66 | { |
| 67 | unsigned int i; |
| 68 | |
| 69 | for (i = 0; i < 512; i++) { |
| 70 | guint32 plot; |
| 71 | |
| 72 | plot = i * resolx / 512 + (resoly / 4 + data[0][i] / 1600) * resolx; |
| 73 | p[plot] = color1; |
| 74 | p[plot + 1] = color1; |
| 75 | plot = i * resolx / 512 + (resoly * 3 / 4 - data[1][i] / 1600) * resolx; |
| 76 | p[plot] = color2; |
| 77 | p[plot + 1] = color2; |
| 78 | } |
| 79 | break; |
| 80 | } |
| 81 | |
| 82 | case 1: /* Stereo circles */ |
| 83 | { |
| 84 | float z; |
| 85 | unsigned int monX = resolx / 2; |
| 86 | float monY = resoly / 4; |
| 87 | float monY2 = resoly / 2; |
| 88 | |
| 89 | for (z = 0; z < 6.2832f; z += 1.0f / monY) { |
| 90 | /* float offset1 = 128+data[1][(unsigned int)(z*81.33f)])/200000; */ |
| 91 | p[monX + (unsigned int) ((monY + ((float) resoly) * (128 + |
| 92 | data[1][(unsigned int) (z * 81.33f)]) / 200000) * |
| 93 | cos (z) + resolx * (unsigned int) (monY2 + (monY + |
| 94 | ((float) resoly) * (128 + |
| 95 | data[1][(unsigned int) (z * 81.33f)]) / 400000) * |
| 96 | sin (z)))] = color1; |
| 97 | p[monX + (unsigned int) ((monY - ((float) resoly) * (128 + |
| 98 | data[0][(unsigned int) (z * 81.33f)]) / 200000) * |
| 99 | cos (z) + resolx * (unsigned int) (monY2 + (monY - |
| 100 | ((float) resoly) * (128 + |
| 101 | data[0][(unsigned int) (z * 81.33f)]) / 400000) * |
| 102 | sin (z)))] = color2; |
| 103 | } |
| 104 | break; |
| 105 | } |
| 106 | } |
| 107 | } |