dlls/wineps.drv/color.c

   1 /*
   2  *      PostScript colour functions
   3  *
   4  *      Copyright 1998  Huw D M Davies
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "psdrv.h"
  22 #include "wine/debug.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
  25
  26
  27 PSRGB rgb_to_grayscale_scale( void )
  28 {
  29     static const PSRGB scale = {0.3, 0.59, 0.11};
  30     /* FIXME configurable */
  31     return scale;
  32 }
  33
  34 /**********************************************************************
  35  *           PSDRV_CreateColor
  36  *
  37  * Creates a PostScript colour from a COLORREF.
  38  * Result is grey scale if ColorDevice field of ppd is CD_False else an
  39  * rgb colour is produced.
  40  */
  41 void PSDRV_CreateColor( print_ctx *ctx, PSCOLOR *pscolor, COLORREF wincolor )
  42 {
  43     int ctype = wincolor >> 24;
  44     float r, g, b;
  45
  46     if(ctype != 0 && ctype != 2)
  47         FIXME("Colour is %08lx\n", wincolor);
  48
  49     r = (wincolor & 0xff) / 256.0;
  50     g = ((wincolor >> 8) & 0xff) / 256.0;
  51     b = ((wincolor >> 16) & 0xff) / 256.0;
  52
  53     if(ctx->pi->ppd->ColorDevice != CD_False) {
  54         pscolor->type = PSCOLOR_RGB;
  55         pscolor->value.rgb.r = r;
  56         pscolor->value.rgb.g = g;
  57         pscolor->value.rgb.b = b;
  58     } else {
  59         PSRGB scale = rgb_to_grayscale_scale();
  60         pscolor->type = PSCOLOR_GRAY;
  61         pscolor->value.gray.i = r * scale.r + g * scale.g + b * scale.b;
  62     }
  63     return;
  64 }
  65
  66
  67 /***********************************************************************
  68  *           PSDRV_SetBkColor
  69  */
  70 COLORREF PSDRV_SetBkColor( print_ctx *ctx, COLORREF color )
  71 {
  72     PSDRV_CreateColor(ctx, &ctx->bkColor, color);
  73     return color;
  74 }
  75
  76
  77 /***********************************************************************
  78  *           PSDRV_SetTextColor
  79  */
  80 COLORREF PSDRV_SetTextColor( print_ctx *ctx, COLORREF color )
  81 {
  82     PSDRV_CreateColor(ctx, &ctx->font.color, color);
  83     ctx->font.set = FALSE;
  84     return color;
  85 }