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1 | // Copyright (c) 1999-2012 OPEN CASCADE SAS |
2 | // |
3 | // The content of this file is subject to the Open CASCADE Technology Public |
4 | // License Version 6.5 (the "License"). You may not use the content of this file |
5 | // except in compliance with the License. Please obtain a copy of the License |
6 | // at http://www.opencascade.org and read it completely before using this file. |
7 | // |
8 | // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its |
9 | // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. |
10 | // |
11 | // The Original Code and all software distributed under the License is |
12 | // distributed on an "AS IS" basis, without warranty of any kind, and the |
13 | // Initial Developer hereby disclaims all such warranties, including without |
14 | // limitation, any warranties of merchantability, fitness for a particular |
15 | // purpose or non-infringement. Please see the License for the specific terms |
16 | // and conditions governing the rights and limitations under the License. |
17 | |
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18 | |
19 | #include <Xw_Extension.h> |
20 | |
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21 | /* ifdef then trace on */ |
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22 | #ifdef TRACE |
23 | #define TRACE_GET_COLOR |
24 | #endif |
25 | |
26 | /* |
27 | STATUS Xw_get_color(acolormap,index,r,g,b,pixel): |
28 | XW_EXT_COLORMAP *acolormap Colormap extension structure |
29 | int index ; Color index 0 >= x < MAXCOLOR |
30 | float *r,*g,*b ; Return Red,Green,Blue color value 0. >= x <= 1. |
31 | unsigned long *pixel ; |
32 | |
33 | Get R,G,B Color values from index . |
34 | |
35 | Returns ERROR if BadColor Index or color is not defined |
36 | Returns SUCCESS if Successful |
37 | |
38 | */ |
39 | |
40 | #ifdef XW_PROTOTYPE |
41 | XW_STATUS Xw_get_color (void* acolormap,int index,float* r,float* g,float* b,unsigned long *pixel) |
42 | #else |
43 | XW_STATUS Xw_get_color (acolormap,index,r,g,b,pixel) |
44 | void *acolormap; |
45 | int index ; |
46 | float *r,*g,*b ; |
47 | unsigned long *pixel ; |
48 | #endif /*XW_PROTOTYPE*/ |
49 | { |
50 | XW_EXT_COLORMAP *pcolormap = (XW_EXT_COLORMAP*)acolormap; |
51 | XColor color ; |
52 | |
53 | *pixel = 0; |
54 | *r = *g = *b = 0.; |
55 | |
56 | if ( !Xw_isdefine_colorindex(pcolormap,index) ) { |
57 | /*ERROR*Bad color Index*/ |
58 | Xw_set_error(1,"Xw_get_color",&index) ; |
59 | return (XW_ERROR) ; |
60 | } |
61 | |
62 | |
63 | switch ( _CCLASS ) { |
64 | |
65 | case PseudoColor : |
66 | case StaticColor : |
67 | color.pixel = pcolormap->pixels[index] ; |
68 | XQueryColor(_CDISPLAY,_CINFO.colormap,&color) ; |
69 | *r = (float)color.red/0xFFFF ; |
70 | *g = (float)color.green/0xFFFF ; |
71 | *b = (float)color.blue/0xFFFF ; |
72 | break ; |
73 | |
74 | case TrueColor : |
75 | { unsigned long mask = _CVISUAL->map_entries-1 ; |
76 | unsigned long red,green,blue ; |
77 | unsigned long rmask = _CVISUAL->red_mask ; |
78 | unsigned long gmask = _CVISUAL->green_mask ; |
79 | unsigned long bmask = _CVISUAL->blue_mask ; |
80 | |
81 | color.pixel = pcolormap->pixels[index] ; |
82 | red = color.pixel & rmask ; |
83 | while ( !(rmask & 0x01) ) { rmask >>= 1; red >>= 1; } |
84 | |
85 | green = color.pixel & gmask ; |
86 | while ( !(gmask & 0x01) ) { gmask >>= 1; green >>= 1; } |
87 | |
88 | blue = color.pixel & bmask ; |
89 | while ( !(bmask & 0x01) ) { bmask >>= 1; blue >>= 1; } |
90 | |
91 | *r = (float)red/mask ; |
92 | *g = (float)green/mask ; |
93 | *b = (float)blue/mask ; |
94 | } |
95 | break ; |
96 | |
97 | default : |
98 | /*Unmatchable Visual class*/ |
99 | Xw_set_error(67,"Xw_get_color",&_CCLASS) ; |
100 | return (XW_ERROR) ; |
101 | } |
102 | |
103 | *pixel = color.pixel ; |
104 | |
105 | |
106 | #ifdef TRACE_GET_COLOR |
107 | if( Xw_get_trace() > 1 ) { |
108 | printf(" Xw_get_color(%lx,%d,%f,%f,%f,%lx)\n",(long ) pcolormap,index,*r,*g,*b,*pixel) ; |
109 | } |
110 | #endif |
111 | |
112 | return (XW_SUCCESS); |
113 | } |