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 #include "config.h"
  22
  23 #include <stdlib.h>
  24
  25 #include "x11drv.h"
  26 #include "wine/debug.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  29
  30 static const char HatchBrushes[][8] =
  31 {
  32     { 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00 }, /* HS_HORIZONTAL */
  33     { 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08 }, /* HS_VERTICAL   */
  34     { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }, /* HS_FDIAGONAL  */
  35     { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }, /* HS_BDIAGONAL  */
  36     { 0x08, 0x08, 0x08, 0xff, 0x08, 0x08, 0x08, 0x08 }, /* HS_CROSS      */
  37     { 0x81, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x81 }, /* HS_DIAGCROSS  */
  38 };
  39
  40   /* Levels of each primary for dithering */
  41 #define PRIMARY_LEVELS  3
  42 #define TOTAL_LEVELS    (PRIMARY_LEVELS*PRIMARY_LEVELS*PRIMARY_LEVELS)
  43
  44  /* Dithering matrix size  */
  45 #define MATRIX_SIZE     8
  46 #define MATRIX_SIZE_2   (MATRIX_SIZE*MATRIX_SIZE)
  47
  48   /* Total number of possible levels for a dithered primary color */
  49 #define DITHER_LEVELS   (MATRIX_SIZE_2 * (PRIMARY_LEVELS-1) + 1)
  50
  51   /* Dithering matrix */
  52 static const int dither_matrix[MATRIX_SIZE_2] =
  53 {
  54      0, 32,  8, 40,  2, 34, 10, 42,
  55     48, 16, 56, 24, 50, 18, 58, 26,
  56     12, 44,  4, 36, 14, 46,  6, 38,
  57     60, 28, 52, 20, 62, 30, 54, 22,
  58      3, 35, 11, 43,  1, 33,  9, 41,
  59     51, 19, 59, 27, 49, 17, 57, 25,
  60     15, 47,  7, 39, 13, 45,  5, 37,
  61     63, 31, 55, 23, 61, 29, 53, 21
  62 };
  63
  64   /* Mapping between (R,G,B) triples and EGA colors */
  65 static const int EGAmapping[TOTAL_LEVELS] =
  66 {
  67     0,  /* 000000 -> 000000 */
  68     4,  /* 00007f -> 000080 */
  69     12, /* 0000ff -> 0000ff */
  70     2,  /* 007f00 -> 008000 */
  71     6,  /* 007f7f -> 008080 */
  72     6,  /* 007fff -> 008080 */
  73     10, /* 00ff00 -> 00ff00 */
  74     6,  /* 00ff7f -> 008080 */
  75     14, /* 00ffff -> 00ffff */
  76     1,  /* 7f0000 -> 800000 */
  77     5,  /* 7f007f -> 800080 */
  78     5,  /* 7f00ff -> 800080 */
  79     3,  /* 7f7f00 -> 808000 */
  80     8,  /* 7f7f7f -> 808080 */
  81     7,  /* 7f7fff -> c0c0c0 */
  82     3,  /* 7fff00 -> 808000 */
  83     7,  /* 7fff7f -> c0c0c0 */
  84     7,  /* 7fffff -> c0c0c0 */
  85     9,  /* ff0000 -> ff0000 */
  86     5,  /* ff007f -> 800080 */
  87     13, /* ff00ff -> ff00ff */
  88     3,  /* ff7f00 -> 808000 */
  89     7,  /* ff7f7f -> c0c0c0 */
  90     7,  /* ff7fff -> c0c0c0 */
  91     11, /* ffff00 -> ffff00 */
  92     7,  /* ffff7f -> c0c0c0 */
  93     15  /* ffffff -> ffffff */
  94 };
  95
  96 #define PIXEL_VALUE(r,g,b) \
  97     X11DRV_PALETTE_mapEGAPixel[EGAmapping[((r)*PRIMARY_LEVELS+(g))*PRIMARY_LEVELS+(b)]]
  98
  99 static const COLORREF BLACK = RGB(0, 0, 0);
 100 static const COLORREF WHITE = RGB(0xff, 0xff, 0xff);
 101
 102 /***********************************************************************
 103  *           BRUSH_DitherColor
 104  */
 105 static Pixmap BRUSH_DitherColor( COLORREF color, int depth)
 106 {
 107     /* X image for building dithered pixmap */
 108     static XImage *ditherImage = NULL;
 109     static COLORREF prevColor = 0xffffffff;
 110     unsigned int x, y;
 111     Pixmap pixmap;
 112     GC gc;
 113
 114     XLockDisplay( gdi_display );
 115     if (!ditherImage)
 116     {
 117         ditherImage = XCreateImage( gdi_display, default_visual.visual, depth, ZPixmap, 0,
 118                                     NULL, MATRIX_SIZE, MATRIX_SIZE, 32, 0 );
 119         if (!ditherImage)
 120         {
 121             ERR("Could not create dither image\n");
 122             XUnlockDisplay( gdi_display );
 123             return 0;
 124         }
 125         ditherImage->data = HeapAlloc( GetProcessHeap(), 0,
 126                                        ditherImage->height * ditherImage->bytes_per_line );
 127     }
 128
 129     if (color != prevColor)
 130     {
 131         int r = GetRValue( color ) * DITHER_LEVELS;
 132         int g = GetGValue( color ) * DITHER_LEVELS;
 133         int b = GetBValue( color ) * DITHER_LEVELS;
 134         const int *pmatrix = dither_matrix;
 135
 136         for (y = 0; y < MATRIX_SIZE; y++)
 137         {
 138             for (x = 0; x < MATRIX_SIZE; x++)
 139             {
 140                 int d  = *pmatrix++ * 256;
 141                 int dr = ((r + d) / MATRIX_SIZE_2) / 256;
 142                 int dg = ((g + d) / MATRIX_SIZE_2) / 256;
 143                 int db = ((b + d) / MATRIX_SIZE_2) / 256;
 144                 XPutPixel( ditherImage, x, y, PIXEL_VALUE(dr,dg,db) );
 145             }
 146         }
 147         prevColor = color;
 148     }
 149
 150     pixmap = XCreatePixmap( gdi_display, root_window, MATRIX_SIZE, MATRIX_SIZE, depth );
 151     gc = XCreateGC( gdi_display, pixmap, 0, NULL );
 152     XPutImage( gdi_display, pixmap, gc, ditherImage, 0, 0, 0, 0, MATRIX_SIZE, MATRIX_SIZE );
 153     XFreeGC( gdi_display, gc );
 154     XUnlockDisplay( gdi_display );
 155
 156     return pixmap;
 157 }
 158
 159
 160 /***********************************************************************
 161  *           BRUSH_DitherMono
 162  */
 163 static Pixmap BRUSH_DitherMono( COLORREF color )
 164 {
 165     /* This makes the spray work in Win 3.11 pbrush.exe */
 166     /* FIXME. Extend this basic selection of dither patterns */
 167     static const char gray_dither[][2] = {{ 0x1, 0x0 }, /* DKGRAY */
 168                                           { 0x2, 0x1 }, /* GRAY */
 169                                           { 0x1, 0x3 }, /* LTGRAY */
 170     };
 171     int gray = (30 * GetRValue(color) + 59 * GetGValue(color) + 11 * GetBValue(color)) / 100;
 172     int idx = gray * (ARRAY_SIZE( gray_dither ) + 1)/256 - 1;
 173
 174     TRACE("color=%06x -> gray=%x\n", color, gray);
 175     return XCreateBitmapFromData( gdi_display, root_window, gray_dither[idx], 2, 2 );
 176 }
 177
 178 /***********************************************************************
 179  *           BRUSH_SelectSolidBrush
 180  */
 181 static void BRUSH_SelectSolidBrush( X11DRV_PDEVICE *physDev, COLORREF color )
 182 {
 183     COLORREF colorRGB = X11DRV_PALETTE_GetColor( physDev, color );
 184     if ((physDev->depth > 1) && (default_visual.depth <= 8) && !X11DRV_IsSolidColor( color ))
 185     {
 186           /* Dithered brush */
 187         physDev->brush.pixmap = BRUSH_DitherColor( colorRGB, physDev->depth );
 188         physDev->brush.fillStyle = FillTiled;
 189         physDev->brush.pixel = 0;
 190     }
 191     else if (physDev->depth == 1 && colorRGB != WHITE && colorRGB != BLACK)
 192     {
 193         physDev->brush.pixel = 0;
 194         physDev->brush.pixmap = BRUSH_DitherMono( colorRGB );
 195         physDev->brush.fillStyle = FillTiled;
 196     }
 197     else
 198     {
 199           /* Solid brush */
 200         physDev->brush.pixel = X11DRV_PALETTE_ToPhysical( physDev, color );
 201         physDev->brush.fillStyle = FillSolid;
 202     }
 203 }
 204
 205
 206 static BOOL select_pattern_brush( X11DRV_PDEVICE *physdev, const struct brush_pattern *pattern )
 207 {
 208     XVisualInfo vis = default_visual;
 209     Pixmap pixmap;
 210     const BITMAPINFO *info = pattern->info;
 211
 212     if (physdev->depth == 1 || info->bmiHeader.biBitCount == 1) vis.depth = 1;
 213
 214     pixmap = create_pixmap_from_image( physdev->dev.hdc, &vis, info, &pattern->bits, pattern->usage );
 215     if (!pixmap) return FALSE;
 216
 217     if (physdev->brush.pixmap) XFreePixmap( gdi_display, physdev->brush.pixmap );
 218     physdev->brush.pixmap = pixmap;
 219
 220     if (vis.depth == 1)
 221     {
 222         physdev->brush.fillStyle = FillOpaqueStippled;
 223         physdev->brush.pixel = -1;  /* Special case (see DC_SetupGCForBrush) */
 224     }
 225     else
 226     {
 227         physdev->brush.fillStyle = FillTiled;
 228         physdev->brush.pixel = 0;  /* Ignored */
 229     }
 230     return TRUE;
 231 }
 232
 233 /***********************************************************************
 234  *           SelectBrush   (X11DRV.@)
 235  */
 236 HBRUSH CDECL X11DRV_SelectBrush( PHYSDEV dev, HBRUSH hbrush, const struct brush_pattern *pattern )
 237 {
 238     X11DRV_PDEVICE *physDev = get_x11drv_dev( dev );
 239     LOGBRUSH logbrush;
 240
 241     if (pattern)  /* pattern brush */
 242     {
 243         if (!select_pattern_brush( physDev, pattern )) return 0;
 244         TRACE("BS_PATTERN\n");
 245         physDev->brush.style = BS_PATTERN;
 246         return hbrush;
 247     }
 248
 249     if (!GetObjectA( hbrush, sizeof(logbrush), &logbrush )) return 0;
 250
 251     TRACE("hdc=%p hbrush=%p\n", dev->hdc, hbrush);
 252
 253     if (physDev->brush.pixmap)
 254     {
 255         XFreePixmap( gdi_display, physDev->brush.pixmap );
 256         physDev->brush.pixmap = 0;
 257     }
 258     physDev->brush.style = logbrush.lbStyle;
 259     if (hbrush == GetStockObject( DC_BRUSH ))
 260         logbrush.lbColor = GetDCBrushColor( dev->hdc );
 261
 262     switch(logbrush.lbStyle)
 263     {
 264       case BS_NULL:
 265         TRACE("BS_NULL\n" );
 266         break;
 267
 268       case BS_SOLID:
 269         TRACE("BS_SOLID\n" );
 270         BRUSH_SelectSolidBrush( physDev, logbrush.lbColor );
 271         break;
 272
 273       case BS_HATCHED:
 274         TRACE("BS_HATCHED\n" );
 275         physDev->brush.pixel = X11DRV_PALETTE_ToPhysical( physDev, logbrush.lbColor );
 276         physDev->brush.pixmap = XCreateBitmapFromData( gdi_display, root_window,
 277                                                        HatchBrushes[logbrush.lbHatch], 8, 8 );
 278         physDev->brush.fillStyle = FillStippled;
 279         break;
 280     }
 281     return hbrush;
 282 }
 283
 284
 285 /***********************************************************************
 286  *           SetDCBrushColor (X11DRV.@)
 287  */
 288 COLORREF CDECL X11DRV_SetDCBrushColor( PHYSDEV dev, COLORREF crColor )
 289 {
 290     X11DRV_PDEVICE *physDev = get_x11drv_dev( dev );
 291
 292     if (GetCurrentObject(dev->hdc, OBJ_BRUSH) == GetStockObject( DC_BRUSH ))
 293         BRUSH_SelectSolidBrush( physDev, crColor );
 294
 295     return crColor;
 296 }