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 "wine/winbase16.h"
  26 #include "x11drv.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(gdi);
  30
  31 static const char HatchBrushes[][8] =
  32 {
  33     { 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00 }, /* HS_HORIZONTAL */
  34     { 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08 }, /* HS_VERTICAL   */
  35     { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }, /* HS_FDIAGONAL  */
  36     { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }, /* HS_BDIAGONAL  */
  37     { 0x08, 0x08, 0x08, 0xff, 0x08, 0x08, 0x08, 0x08 }, /* HS_CROSS      */
  38     { 0x81, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x81 }, /* HS_DIAGCROSS  */
  39 };
  40
  41   /* Levels of each primary for dithering */
  42 #define PRIMARY_LEVELS  3
  43 #define TOTAL_LEVELS    (PRIMARY_LEVELS*PRIMARY_LEVELS*PRIMARY_LEVELS)
  44
  45  /* Dithering matrix size  */
  46 #define MATRIX_SIZE     8
  47 #define MATRIX_SIZE_2   (MATRIX_SIZE*MATRIX_SIZE)
  48
  49   /* Total number of possible levels for a dithered primary color */
  50 #define DITHER_LEVELS   (MATRIX_SIZE_2 * (PRIMARY_LEVELS-1) + 1)
  51
  52   /* Dithering matrix */
  53 static const int dither_matrix[MATRIX_SIZE_2] =
  54 {
  55      0, 32,  8, 40,  2, 34, 10, 42,
  56     48, 16, 56, 24, 50, 18, 58, 26,
  57     12, 44,  4, 36, 14, 46,  6, 38,
  58     60, 28, 52, 20, 62, 30, 54, 22,
  59      3, 35, 11, 43,  1, 33,  9, 41,
  60     51, 19, 59, 27, 49, 17, 57, 25,
  61     15, 47,  7, 39, 13, 45,  5, 37,
  62     63, 31, 55, 23, 61, 29, 53, 21
  63 };
  64
  65   /* Mapping between (R,G,B) triples and EGA colors */
  66 static const int EGAmapping[TOTAL_LEVELS] =
  67 {
  68     0,  /* 000000 -> 000000 */
  69     4,  /* 00007f -> 000080 */
  70     12, /* 0000ff -> 0000ff */
  71     2,  /* 007f00 -> 008000 */
  72     6,  /* 007f7f -> 008080 */
  73     6,  /* 007fff -> 008080 */
  74     10, /* 00ff00 -> 00ff00 */
  75     6,  /* 00ff7f -> 008080 */
  76     14, /* 00ffff -> 00ffff */
  77     1,  /* 7f0000 -> 800000 */
  78     5,  /* 7f007f -> 800080 */
  79     5,  /* 7f00ff -> 800080 */
  80     3,  /* 7f7f00 -> 808000 */
  81     8,  /* 7f7f7f -> 808080 */
  82     7,  /* 7f7fff -> c0c0c0 */
  83     3,  /* 7fff00 -> 808000 */
  84     7,  /* 7fff7f -> c0c0c0 */
  85     7,  /* 7fffff -> c0c0c0 */
  86     9,  /* ff0000 -> ff0000 */
  87     5,  /* ff007f -> 800080 */
  88     13, /* ff00ff -> ff00ff */
  89     3,  /* ff7f00 -> 808000 */
  90     7,  /* ff7f7f -> c0c0c0 */
  91     7,  /* ff7fff -> c0c0c0 */
  92     11, /* ffff00 -> ffff00 */
  93     7,  /* ffff7f -> c0c0c0 */
  94     15  /* ffffff -> ffffff */
  95 };
  96
  97 #define PIXEL_VALUE(r,g,b) \
  98     X11DRV_PALETTE_mapEGAPixel[EGAmapping[((r)*PRIMARY_LEVELS+(g))*PRIMARY_LEVELS+(b)]]
  99
 100 static const COLORREF BLACK = RGB(0, 0, 0);
 101 static const COLORREF WHITE = RGB(0xff, 0xff, 0xff);
 102
 103 /***********************************************************************
 104  *           BRUSH_DitherColor
 105  */
 106 static Pixmap BRUSH_DitherColor( COLORREF color, int depth)
 107 {
 108     /* X image for building dithered pixmap */
 109     static XImage *ditherImage = NULL;
 110     static COLORREF prevColor = 0xffffffff;
 111     unsigned int x, y;
 112     Pixmap pixmap;
 113     GC gc;
 114
 115     wine_tsx11_lock();
 116     if (!ditherImage)
 117     {
 118         ditherImage = XCreateImage( gdi_display, visual, depth, ZPixmap, 0,
 119                                     NULL, MATRIX_SIZE, MATRIX_SIZE, 32, 0 );
 120         if (!ditherImage)
 121         {
 122             wine_tsx11_unlock();
 123             ERR("Could not create dither image\n");
 124             return 0;
 125         }
 126         ditherImage->data = HeapAlloc( GetProcessHeap(), 0,
 127                                        ditherImage->height * ditherImage->bytes_per_line );
 128     }
 129
 130     if (color != prevColor)
 131     {
 132         int r = GetRValue( color ) * DITHER_LEVELS;
 133         int g = GetGValue( color ) * DITHER_LEVELS;
 134         int b = GetBValue( color ) * DITHER_LEVELS;
 135         const int *pmatrix = dither_matrix;
 136
 137         for (y = 0; y < MATRIX_SIZE; y++)
 138         {
 139             for (x = 0; x < MATRIX_SIZE; x++)
 140             {
 141                 int d  = *pmatrix++ * 256;
 142                 int dr = ((r + d) / MATRIX_SIZE_2) / 256;
 143                 int dg = ((g + d) / MATRIX_SIZE_2) / 256;
 144                 int db = ((b + d) / MATRIX_SIZE_2) / 256;
 145                 XPutPixel( ditherImage, x, y, PIXEL_VALUE(dr,dg,db) );
 146             }
 147         }
 148         prevColor = color;
 149     }
 150
 151     pixmap = XCreatePixmap( gdi_display, root_window, MATRIX_SIZE, MATRIX_SIZE, depth );
 152     gc = XCreateGC( gdi_display, pixmap, 0, NULL );
 153     XPutImage( gdi_display, pixmap, gc, ditherImage, 0, 0, 0, 0, MATRIX_SIZE, MATRIX_SIZE );
 154     XFreeGC( gdi_display, gc );
 155     wine_tsx11_unlock();
 156
 157     return pixmap;
 158 }
 159
 160
 161 /***********************************************************************
 162  *           BRUSH_DitherMono
 163  */
 164 static Pixmap BRUSH_DitherMono( COLORREF color )
 165 {
 166     /* This makes the spray work in Win 3.11 pbrush.exe */
 167     /* FIXME. Extend this basic selection of dither patterns */
 168     static const char gray_dither[][2] = {{ 0x1, 0x0 }, /* DKGRAY */
 169                                           { 0x2, 0x1 }, /* GRAY */
 170                                           { 0x1, 0x3 }, /* LTGRAY */
 171     };
 172     int gray = (30 * GetRValue(color) + 59 * GetGValue(color) + 11 * GetBValue(color)) / 100;
 173     int idx = gray * (sizeof gray_dither/sizeof gray_dither[0] + 1)/256 - 1;
 174
 175     TRACE("color=%06x -> gray=%x\n", color, gray);
 176     return XCreateBitmapFromData( gdi_display, root_window, gray_dither[idx], 2, 2 );
 177 }
 178
 179 /***********************************************************************
 180  *           BRUSH_SelectSolidBrush
 181  */
 182 static void BRUSH_SelectSolidBrush( X11DRV_PDEVICE *physDev, COLORREF color )
 183 {
 184     COLORREF colorRGB = X11DRV_PALETTE_GetColor( physDev, color );
 185     if ((physDev->depth > 1) && (screen_depth <= 8) && !X11DRV_IsSolidColor( color ))
 186     {
 187           /* Dithered brush */
 188         physDev->brush.pixmap = BRUSH_DitherColor( colorRGB, physDev->depth );
 189         physDev->brush.fillStyle = FillTiled;
 190         physDev->brush.pixel = 0;
 191     }
 192     else if (physDev->depth == 1 && colorRGB != WHITE && colorRGB != BLACK)
 193     {
 194         physDev->brush.pixel = 0;
 195         physDev->brush.pixmap = BRUSH_DitherMono( colorRGB );
 196         physDev->brush.fillStyle = FillTiled;
 197     }
 198     else
 199     {
 200           /* Solid brush */
 201         physDev->brush.pixel = X11DRV_PALETTE_ToPhysical( physDev, color );
 202         physDev->brush.fillStyle = FillSolid;
 203     }
 204 }
 205
 206
 207 static BOOL select_pattern_brush( X11DRV_PDEVICE *physdev, const struct brush_pattern *pattern )
 208 {
 209     XVisualInfo vis;
 210     Pixmap pixmap;
 211     const BITMAPINFO *info = pattern->info;
 212
 213     memset( &vis, 0, sizeof(vis) );
 214     vis.visual     = visual;
 215     vis.visualid   = visual->visualid;
 216
 217     if (physdev->depth > 1 && info->bmiHeader.biBitCount > 1)
 218     {
 219         vis.depth      = screen_depth;
 220         vis.red_mask   = visual->red_mask;
 221         vis.green_mask = visual->green_mask;
 222         vis.blue_mask  = visual->blue_mask;
 223     }
 224     else vis.depth = 1;
 225
 226     pixmap = create_pixmap_from_image( physdev->dev.hdc, &vis, info, &pattern->bits, pattern->usage );
 227     if (!pixmap) return FALSE;
 228
 229     if (physdev->brush.pixmap) XFreePixmap( gdi_display, physdev->brush.pixmap );
 230     physdev->brush.pixmap = pixmap;
 231
 232     if (vis.depth == 1)
 233     {
 234         physdev->brush.fillStyle = FillOpaqueStippled;
 235         physdev->brush.pixel = -1;  /* Special case (see DC_SetupGCForBrush) */
 236     }
 237     else
 238     {
 239         physdev->brush.fillStyle = FillTiled;
 240         physdev->brush.pixel = 0;  /* Ignored */
 241     }
 242     return TRUE;
 243 }
 244
 245 /***********************************************************************
 246  *           SelectBrush   (X11DRV.@)
 247  */
 248 HBRUSH X11DRV_SelectBrush( PHYSDEV dev, HBRUSH hbrush, const struct brush_pattern *pattern )
 249 {
 250     X11DRV_PDEVICE *physDev = get_x11drv_dev( dev );
 251     LOGBRUSH logbrush;
 252
 253     if (pattern)  /* pattern brush */
 254     {
 255         if (!select_pattern_brush( physDev, pattern )) return 0;
 256         TRACE("BS_PATTERN\n");
 257         physDev->brush.style = BS_PATTERN;
 258         return hbrush;
 259     }
 260
 261     if (!GetObjectA( hbrush, sizeof(logbrush), &logbrush )) return 0;
 262
 263     TRACE("hdc=%p hbrush=%p\n", dev->hdc, hbrush);
 264
 265     if (physDev->brush.pixmap)
 266     {
 267         XFreePixmap( gdi_display, physDev->brush.pixmap );
 268         physDev->brush.pixmap = 0;
 269     }
 270     physDev->brush.style = logbrush.lbStyle;
 271     if (hbrush == GetStockObject( DC_BRUSH ))
 272         logbrush.lbColor = GetDCBrushColor( dev->hdc );
 273
 274     switch(logbrush.lbStyle)
 275     {
 276       case BS_NULL:
 277         TRACE("BS_NULL\n" );
 278         break;
 279
 280       case BS_SOLID:
 281         TRACE("BS_SOLID\n" );
 282         BRUSH_SelectSolidBrush( physDev, logbrush.lbColor );
 283         break;
 284
 285       case BS_HATCHED:
 286         TRACE("BS_HATCHED\n" );
 287         physDev->brush.pixel = X11DRV_PALETTE_ToPhysical( physDev, logbrush.lbColor );
 288         physDev->brush.pixmap = XCreateBitmapFromData( gdi_display, root_window,
 289                                                        HatchBrushes[logbrush.lbHatch], 8, 8 );
 290         physDev->brush.fillStyle = FillStippled;
 291         break;
 292     }
 293     return hbrush;
 294 }
 295
 296
 297 /***********************************************************************
 298  *           SetDCBrushColor (X11DRV.@)
 299  */
 300 COLORREF X11DRV_SetDCBrushColor( PHYSDEV dev, COLORREF crColor )
 301 {
 302     X11DRV_PDEVICE *physDev = get_x11drv_dev( dev );
 303
 304     if (GetCurrentObject(dev->hdc, OBJ_BRUSH) == GetStockObject( DC_BRUSH ))
 305         BRUSH_SelectSolidBrush( physDev, crColor );
 306
 307     return crColor;
 308 }