graphics/psdrv/color.c

   1 /*
   2  *      PostScript colour functions
   3  *
   4  *      Copyright 1998  Huw D M Davies
   5  *
   6  */
   7
   8 #include "psdrv.h"
   9 #include "debugtools.h"
  10
  11 DEFAULT_DEBUG_CHANNEL(psdrv)
  12
  13 /**********************************************************************
  14  *           PSDRV_CmpColor
  15  *
  16  * Return TRUE if col1 == col2
  17  */
  18 BOOL PSDRV_CmpColor(PSCOLOR *col1, PSCOLOR *col2)
  19 {
  20     if(col1->type != col2->type)
  21         return FALSE;
  22
  23     switch(col1->type) {
  24     case PSCOLOR_GRAY:
  25         if(col1->value.gray.i == col2->value.gray.i)
  26             return TRUE;
  27         break;
  28     case PSCOLOR_RGB:
  29         if( col1->value.rgb.r == col2->value.rgb.r &&
  30             col1->value.rgb.g == col2->value.rgb.g &&
  31             col1->value.rgb.b == col2->value.rgb.b )
  32             return TRUE;
  33         break;
  34     default:
  35         ERR("Unknown colour type %d\n", col1->type);
  36     }
  37     return FALSE;
  38 }
  39
  40
  41 /**********************************************************************
  42  *           PSDRV_CopyColor
  43  *
  44  * Copies col2 into col1. Return FALSE on error.
  45  */
  46 BOOL PSDRV_CopyColor(PSCOLOR *col1, PSCOLOR *col2)
  47 {
  48
  49     switch(col2->type) {
  50     case PSCOLOR_GRAY:
  51         col1->value.gray.i = col2->value.gray.i;
  52         break;
  53
  54     case PSCOLOR_RGB:
  55         col1->value.rgb.r = col2->value.rgb.r;
  56         col1->value.rgb.g = col2->value.rgb.g;
  57         col1->value.rgb.b = col2->value.rgb.b;
  58         break;
  59
  60     default:
  61         ERR("Unknown colour type %d\n", col1->type);
  62         return FALSE;
  63     }
  64
  65     col1->type = col2->type;
  66     return TRUE;
  67 }
  68
  69
  70 /**********************************************************************
  71  *           PSDRV_CreateColor
  72  *
  73  * Creates a PostScript colour from a COLORREF.
  74  * Result is grey scale if ColorDevice field of ppd is FALSE else an
  75  * rgb colour is produced.
  76  */
  77 void PSDRV_CreateColor( PSDRV_PDEVICE *physDev, PSCOLOR *pscolor,
  78                      COLORREF wincolor )
  79 {
  80     int ctype = wincolor >> 24;
  81     float r, g, b;
  82
  83     if(ctype != 0 && ctype != 2)
  84         FIXME("Colour is %08lx\n", wincolor);
  85
  86     r = (wincolor & 0xff) / 256.0;
  87     g = ((wincolor >> 8) & 0xff) / 256.0;
  88     b = ((wincolor >> 16) & 0xff) / 256.0;
  89
  90     if(physDev->pi->ppd->ColorDevice) {
  91         pscolor->type = PSCOLOR_RGB;
  92         pscolor->value.rgb.r = r;
  93         pscolor->value.rgb.g = g;
  94         pscolor->value.rgb.b = b;
  95     } else {
  96         pscolor->type = PSCOLOR_GRAY;
  97         /* FIXME configurable */
  98         pscolor->value.gray.i = r * 0.3 + g * 0.59 + b * 0.11;
  99     }
 100     return;
 101 }
 102
 103
 104 /***********************************************************************
 105  *           PSDRV_SetBkColor
 106  */
 107 COLORREF PSDRV_SetBkColor( DC *dc, COLORREF color )
 108 {
 109     PSDRV_PDEVICE *physDev = (PSDRV_PDEVICE *)dc->physDev;
 110     COLORREF oldColor;
 111
 112     oldColor = dc->w.backgroundColor;
 113     dc->w.backgroundColor = color;
 114
 115     PSDRV_CreateColor(physDev, &physDev->bkColor, color);
 116
 117     return oldColor;
 118 }
 119
 120
 121 /***********************************************************************
 122  *           PSDRV_SetTextColor
 123  */
 124 COLORREF PSDRV_SetTextColor( DC *dc, COLORREF color )
 125 {
 126     PSDRV_PDEVICE *physDev = (PSDRV_PDEVICE *)dc->physDev;
 127     COLORREF oldColor;
 128
 129     oldColor = dc->w.textColor;
 130     dc->w.textColor = color;
 131
 132     PSDRV_CreateColor(physDev, &physDev->font.color, color);
 133     physDev->font.set = FALSE;
 134     return oldColor;
 135 }
 136