dlls/winex11.drv/brush.c

   1 /*
   2  * X11DRV brush objects
   3  *
   4  * Copyright 1993, 1994  Alexandre Julliard
   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 #if 0
  22 #pragma makedep unix
  23 #endif
  24
  25 #include "config.h"
  26
  27 #include <stdlib.h>
  28
  29 #include "x11drv.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  33
  34 static const char HatchBrushes[][8] =
  35 {
  36     { 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00 }, /* HS_HORIZONTAL */
  37     { 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08 }, /* HS_VERTICAL   */
  38     { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }, /* HS_FDIAGONAL  */
  39     { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }, /* HS_BDIAGONAL  */
  40     { 0x08, 0x08, 0x08, 0xff, 0x08, 0x08, 0x08, 0x08 }, /* HS_CROSS      */
  41     { 0x81, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x81 }, /* HS_DIAGCROSS  */
  42 };
  43
  44   /* Levels of each primary for dithering */
  45 #define PRIMARY_LEVELS  3
  46 #define TOTAL_LEVELS    (PRIMARY_LEVELS*PRIMARY_LEVELS*PRIMARY_LEVELS)
  47
  48  /* Dithering matrix size  */
  49 #define MATRIX_SIZE     8
  50 #define MATRIX_SIZE_2   (MATRIX_SIZE*MATRIX_SIZE)
  51
  52   /* Total number of possible levels for a dithered primary color */
  53 #define DITHER_LEVELS   (MATRIX_SIZE_2 * (PRIMARY_LEVELS-1) + 1)
  54
  55   /* Dithering matrix */
  56 static const int dither_matrix[MATRIX_SIZE_2] =
  57 {
  58      0, 32,  8, 40,  2, 34, 10, 42,
  59     48, 16, 56, 24, 50, 18, 58, 26,
  60     12, 44,  4, 36, 14, 46,  6, 38,
  61     60, 28, 52, 20, 62, 30, 54, 22,
  62      3, 35, 11, 43,  1, 33,  9, 41,
  63     51, 19, 59, 27, 49, 17, 57, 25,
  64     15, 47,  7, 39, 13, 45,  5, 37,
  65     63, 31, 55, 23, 61, 29, 53, 21
  66 };
  67
  68   /* Mapping between (R,G,B) triples and EGA colors */
  69 static const int EGAmapping[TOTAL_LEVELS] =
  70 {
  71     0,  /* 000000 -> 000000 */
  72     4,  /* 00007f -> 000080 */
  73     12, /* 0000ff -> 0000ff */
  74     2,  /* 007f00 -> 008000 */
  75     6,  /* 007f7f -> 008080 */
  76     6,  /* 007fff -> 008080 */
  77     10, /* 00ff00 -> 00ff00 */
  78     6,  /* 00ff7f -> 008080 */
  79     14, /* 00ffff -> 00ffff */
  80     1,  /* 7f0000 -> 800000 */
  81     5,  /* 7f007f -> 800080 */
  82     5,  /* 7f00ff -> 800080 */
  83     3,  /* 7f7f00 -> 808000 */
  84     8,  /* 7f7f7f -> 808080 */
  85     7,  /* 7f7fff -> c0c0c0 */
  86     3,  /* 7fff00 -> 808000 */
  87     7,  /* 7fff7f -> c0c0c0 */
  88     7,  /* 7fffff -> c0c0c0 */
  89     9,  /* ff0000 -> ff0000 */
  90     5,  /* ff007f -> 800080 */
  91     13, /* ff00ff -> ff00ff */
  92     3,  /* ff7f00 -> 808000 */
  93     7,  /* ff7f7f -> c0c0c0 */
  94     7,  /* ff7fff -> c0c0c0 */
  95     11, /* ffff00 -> ffff00 */
  96     7,  /* ffff7f -> c0c0c0 */
  97     15  /* ffffff -> ffffff */
  98 };
  99
 100 #define PIXEL_VALUE(r,g,b) \
 101     X11DRV_PALETTE_mapEGAPixel[EGAmapping[((r)*PRIMARY_LEVELS+(g))*PRIMARY_LEVELS+(b)]]
 102
 103 static const COLORREF BLACK = RGB(0, 0, 0);
 104 static const COLORREF WHITE = RGB(0xff, 0xff, 0xff);
 105
 106 /***********************************************************************
 107  *           BRUSH_DitherColor
 108  */
 109 static Pixmap BRUSH_DitherColor( COLORREF color, int depth)
 110 {
 111     /* X image for building dithered pixmap */
 112     static XImage *ditherImage = NULL;
 113     static COLORREF prevColor = 0xffffffff;
 114     unsigned int x, y;
 115     Pixmap pixmap;
 116     GC gc;
 117
 118     XLockDisplay( gdi_display );
 119     if (!ditherImage)
 120     {
 121         ditherImage = XCreateImage( gdi_display, default_visual.visual, depth, ZPixmap, 0,
 122                                     NULL, MATRIX_SIZE, MATRIX_SIZE, 32, 0 );
 123         if (!ditherImage)
 124         {
 125             ERR("Could not create dither image\n");
 126             XUnlockDisplay( gdi_display );
 127             return 0;
 128         }
 129         ditherImage->data = malloc( ditherImage->height * ditherImage->bytes_per_line );
 130     }
 131
 132     if (color != prevColor)
 133     {
 134         int r = GetRValue( color ) * DITHER_LEVELS;
 135         int g = GetGValue( color ) * DITHER_LEVELS;
 136         int b = GetBValue( color ) * DITHER_LEVELS;
 137         const int *pmatrix = dither_matrix;
 138
 139         for (y = 0; y < MATRIX_SIZE; y++)
 140         {
 141             for (x = 0; x < MATRIX_SIZE; x++)
 142             {
 143                 int d  = *pmatrix++ * 256;
 144                 int dr = ((r + d) / MATRIX_SIZE_2) / 256;
 145                 int dg = ((g + d) / MATRIX_SIZE_2) / 256;
 146                 int db = ((b + d) / MATRIX_SIZE_2) / 256;
 147                 XPutPixel( ditherImage, x, y, PIXEL_VALUE(dr,dg,db) );
 148             }
 149         }
 150         prevColor = color;
 151     }
 152
 153     pixmap = XCreatePixmap( gdi_display, root_window, MATRIX_SIZE, MATRIX_SIZE, depth );
 154     gc = XCreateGC( gdi_display, pixmap, 0, NULL );
 155     XPutImage( gdi_display, pixmap, gc, ditherImage, 0, 0, 0, 0, MATRIX_SIZE, MATRIX_SIZE );
 156     XFreeGC( gdi_display, gc );
 157     XUnlockDisplay( gdi_display );
 158
 159     return pixmap;
 160 }
 161
 162
 163 /***********************************************************************
 164  *           BRUSH_DitherMono
 165  */
 166 static Pixmap BRUSH_DitherMono( COLORREF color )
 167 {
 168     /* This makes the spray work in Win 3.11 pbrush.exe */
 169     /* FIXME. Extend this basic selection of dither patterns */
 170     static const char gray_dither[][2] = {{ 0x1, 0x0 }, /* DKGRAY */
 171                                           { 0x2, 0x1 }, /* GRAY */
 172                                           { 0x1, 0x3 }, /* LTGRAY */
 173     };
 174     int gray = (30 * GetRValue(color) + 59 * GetGValue(color) + 11 * GetBValue(color)) / 100;
 175     int idx = gray * (ARRAY_SIZE( gray_dither ) + 1)/256 - 1;
 176
 177     TRACE("color=%s -> gray=%x\n", debugstr_color(color), gray);
 178     return XCreateBitmapFromData( gdi_display, root_window, gray_dither[idx], 2, 2 );
 179 }
 180
 181 /***********************************************************************
 182  *           BRUSH_SelectSolidBrush
 183  */
 184 static void BRUSH_SelectSolidBrush( X11DRV_PDEVICE *physDev, COLORREF color )
 185 {
 186     COLORREF colorRGB = X11DRV_PALETTE_GetColor( physDev, color );
 187     if ((physDev->depth > 1) && (default_visual.depth <= 8) && !X11DRV_IsSolidColor( color ))
 188     {
 189           /* Dithered brush */
 190         physDev->brush.pixmap = BRUSH_DitherColor( colorRGB, physDev->depth );
 191         physDev->brush.fillStyle = FillTiled;
 192         physDev->brush.pixel = 0;
 193     }
 194     else if (physDev->depth == 1 && colorRGB != WHITE && colorRGB != BLACK)
 195     {
 196         physDev->brush.pixel = 0;
 197         physDev->brush.pixmap = BRUSH_DitherMono( colorRGB );
 198         physDev->brush.fillStyle = FillTiled;
 199     }
 200     else
 201     {
 202           /* Solid brush */
 203         physDev->brush.pixel = X11DRV_PALETTE_ToPhysical( physDev, color );
 204         physDev->brush.fillStyle = FillSolid;
 205     }
 206 }
 207
 208
 209 static BOOL select_pattern_brush( X11DRV_PDEVICE *physdev, const struct brush_pattern *pattern )
 210 {
 211     XVisualInfo vis = default_visual;
 212     Pixmap pixmap;
 213     const BITMAPINFO *info = pattern->info;
 214
 215     if (physdev->depth == 1 || info->bmiHeader.biBitCount == 1) vis.depth = 1;
 216
 217     pixmap = create_pixmap_from_image( physdev->dev.hdc, &vis, info, &pattern->bits, pattern->usage );
 218     if (!pixmap) return FALSE;
 219
 220     if (physdev->brush.pixmap) XFreePixmap( gdi_display, physdev->brush.pixmap );
 221     physdev->brush.pixmap = pixmap;
 222
 223     if (vis.depth == 1)
 224     {
 225         physdev->brush.fillStyle = FillOpaqueStippled;
 226         physdev->brush.pixel = -1;  /* Special case (see DC_SetupGCForBrush) */
 227     }
 228     else
 229     {
 230         physdev->brush.fillStyle = FillTiled;
 231         physdev->brush.pixel = 0;  /* Ignored */
 232     }
 233     return TRUE;
 234 }
 235
 236 /***********************************************************************
 237  *           SelectBrush   (X11DRV.@)
 238  */
 239 HBRUSH X11DRV_SelectBrush( PHYSDEV dev, HBRUSH hbrush, const struct brush_pattern *pattern )
 240 {
 241     X11DRV_PDEVICE *physDev = get_x11drv_dev( dev );
 242     LOGBRUSH logbrush;
 243
 244     if (pattern)  /* pattern brush */
 245     {
 246         if (!select_pattern_brush( physDev, pattern )) return 0;
 247         TRACE("BS_PATTERN\n");
 248         physDev->brush.style = BS_PATTERN;
 249         return hbrush;
 250     }
 251
 252     if (!NtGdiExtGetObjectW( hbrush, sizeof(logbrush), &logbrush )) return 0;
 253
 254     TRACE("hdc=%p hbrush=%p\n", dev->hdc, hbrush);
 255
 256     if (physDev->brush.pixmap)
 257     {
 258         XFreePixmap( gdi_display, physDev->brush.pixmap );
 259         physDev->brush.pixmap = 0;
 260     }
 261     physDev->brush.style = logbrush.lbStyle;
 262     if (hbrush == GetStockObject( DC_BRUSH ))
 263         NtGdiGetDCDword( dev->hdc, NtGdiGetDCBrushColor, &logbrush.lbColor );
 264
 265     switch(logbrush.lbStyle)
 266     {
 267       case BS_NULL:
 268         TRACE("BS_NULL\n" );
 269         break;
 270
 271       case BS_SOLID:
 272         TRACE("BS_SOLID\n" );
 273         BRUSH_SelectSolidBrush( physDev, logbrush.lbColor );
 274         break;
 275
 276       case BS_HATCHED:
 277         TRACE("BS_HATCHED\n" );
 278         physDev->brush.pixel = X11DRV_PALETTE_ToPhysical( physDev, logbrush.lbColor );
 279         physDev->brush.pixmap = XCreateBitmapFromData( gdi_display, root_window,
 280                                                        HatchBrushes[logbrush.lbHatch], 8, 8 );
 281         physDev->brush.fillStyle = FillStippled;
 282         break;
 283     }
 284     return hbrush;
 285 }
 286
 287
 288 /***********************************************************************
 289  *           SetDCBrushColor (X11DRV.@)
 290  */
 291 COLORREF X11DRV_SetDCBrushColor( PHYSDEV dev, COLORREF crColor )
 292 {
 293     X11DRV_PDEVICE *physDev = get_x11drv_dev( dev );
 294
 295     if (NtGdiGetDCObject( dev->hdc, NTGDI_OBJ_BRUSH ) == GetStockObject( DC_BRUSH ))
 296         BRUSH_SelectSolidBrush( physDev, crColor );
 297
 298     return crColor;
 299 }