graphics/psdrv/graphics.c

   1 /*
   2  *      PostScript driver graphics functions
   3  *
   4  *      Copyright 1998  Huw D M Davies
   5  *
   6  */
   7 #include <string.h>
   8 #include <math.h>
   9 #include "config.h"
  10 #if defined(HAVE_FLOAT_H)
  11  #include <float.h>
  12 #endif
  13 #if !defined(PI)
  14  #define PI M_PI
  15 #endif
  16 #include "psdrv.h"
  17 #include "debug.h"
  18 #include "winspool.h"
  19
  20 DEFAULT_DEBUG_CHANNEL(psdrv)
  21
  22 /**********************************************************************
  23  *           PSDRV_MoveToEx
  24  */
  25 BOOL PSDRV_MoveToEx(DC *dc, INT x, INT y, LPPOINT pt)
  26 {
  27     TRACE(psdrv, "%d %d\n", x, y);
  28     if (pt)
  29     {
  30         pt->x = dc->w.CursPosX;
  31         pt->y = dc->w.CursPosY;
  32     }
  33     dc->w.CursPosX = x;
  34     dc->w.CursPosY = y;
  35
  36     return TRUE;
  37 }
  38
  39
  40 /***********************************************************************
  41  *           PSDRV_LineTo
  42  */
  43 BOOL PSDRV_LineTo(DC *dc, INT x, INT y)
  44 {
  45     TRACE(psdrv, "%d %d\n", x, y);
  46
  47     PSDRV_SetPen(dc);
  48     PSDRV_WriteMoveTo(dc, XLPTODP(dc, dc->w.CursPosX),
  49                           YLPTODP(dc, dc->w.CursPosY));
  50     PSDRV_WriteLineTo(dc, XLPTODP(dc, x), YLPTODP(dc, y));
  51     PSDRV_WriteStroke(dc);
  52
  53     dc->w.CursPosX = x;
  54     dc->w.CursPosY = y;
  55     return TRUE;
  56 }
  57
  58
  59 /***********************************************************************
  60  *           PSDRV_Rectangle
  61  */
  62 BOOL PSDRV_Rectangle( DC *dc, INT left, INT top, INT right,
  63                        INT bottom )
  64 {
  65     INT width = XLSTODS(dc, right - left);
  66     INT height = YLSTODS(dc, bottom - top);
  67
  68
  69     TRACE(psdrv, "%d %d - %d %d\n", left, top, right, bottom);
  70
  71     PSDRV_WriteRectangle(dc, XLPTODP(dc, left), YLPTODP(dc, top),
  72                              width, height);
  73
  74     PSDRV_Brush(dc,0);
  75     PSDRV_SetPen(dc);
  76     PSDRV_WriteStroke(dc);
  77     return TRUE;
  78 }
  79
  80
  81 /***********************************************************************
  82  *           PSDRV_RoundRect
  83  */
  84 BOOL PSDRV_RoundRect( DC *dc, INT left, INT top, INT right,
  85                         INT bottom, INT ell_width, INT ell_height )
  86 {
  87     left = XLPTODP( dc, left );
  88     right = XLPTODP( dc, right );
  89     top = YLPTODP( dc, top );
  90     bottom = YLPTODP( dc, bottom );
  91     ell_width = XLSTODS( dc, ell_width );
  92     ell_height = YLSTODS( dc, ell_height );
  93
  94     if( left > right ) { INT tmp = left; left = right; right = tmp; }
  95     if( top > bottom ) { INT tmp = top; top = bottom; bottom = tmp; }
  96
  97     if(ell_width > right - left) ell_width = right - left;
  98     if(ell_height > bottom - top) ell_height = bottom - top;
  99
 100     PSDRV_WriteMoveTo( dc, left, top + ell_height/2 );
 101     PSDRV_WriteArc( dc, left + ell_width/2, top + ell_height/2, ell_width,
 102                     ell_height, 90.0, 180.0);
 103     PSDRV_WriteLineTo( dc, right - ell_width/2, top );
 104     PSDRV_WriteArc( dc, right - ell_width/2, top + ell_height/2, ell_width,
 105                     ell_height, 0.0, 90.0);
 106     PSDRV_WriteLineTo( dc, right, bottom - ell_height/2 );
 107     PSDRV_WriteArc( dc, right - ell_width/2, bottom - ell_height/2, ell_width,
 108                     ell_height, -90.0, 0.0);
 109     PSDRV_WriteLineTo( dc, right - ell_width/2, bottom);
 110     PSDRV_WriteArc( dc, left + ell_width/2, bottom - ell_height/2, ell_width,
 111                     ell_height, 180.0, -90.0);
 112     PSDRV_WriteClosePath( dc );
 113
 114     PSDRV_Brush(dc,0);
 115     PSDRV_SetPen(dc);
 116     PSDRV_WriteStroke(dc);
 117     return TRUE;
 118 }
 119
 120 /***********************************************************************
 121  *           PSDRV_DrawArc
 122  *
 123  * Does the work of Arc, Chord and Pie. lines is 0, 1 or 2 respectively.
 124  */
 125 static BOOL PSDRV_DrawArc( DC *dc, INT left, INT top,
 126                              INT right, INT bottom,
 127                              INT xstart, INT ystart,
 128                              INT xend, INT yend,
 129                              int lines )
 130 {
 131     INT x, y, h, w;
 132     double start_angle, end_angle, ratio;
 133
 134     x = XLPTODP(dc, (left + right)/2);
 135     y = YLPTODP(dc, (top + bottom)/2);
 136
 137     w = XLSTODS(dc, (right - left));
 138     h = YLSTODS(dc, (bottom - top));
 139
 140     if(w < 0) w = -w;
 141     if(h < 0) h = -h;
 142     ratio = ((double)w)/h;
 143
 144     /* angle is the angle after the rectangle is transformed to a square and is
 145        measured anticlockwise from the +ve x-axis */
 146
 147     start_angle = atan2((double)(y - ystart) * ratio, (double)(xstart - x));
 148     end_angle = atan2((double)(y - yend) * ratio, (double)(xend - x));
 149
 150     start_angle *= 180.0 / PI;
 151     end_angle *= 180.0 / PI;
 152
 153     if(lines == 2) /* pie */
 154         PSDRV_WriteMoveTo(dc, x, y);
 155     PSDRV_WriteArc(dc, x, y, w, h, start_angle, end_angle);
 156     if(lines == 1 || lines == 2) { /* chord or pie */
 157         PSDRV_WriteClosePath(dc);
 158         PSDRV_Brush(dc,0);
 159     }
 160     PSDRV_SetPen(dc);
 161     PSDRV_WriteStroke(dc);
 162     return TRUE;
 163 }
 164
 165
 166 /***********************************************************************
 167  *           PSDRV_Arc
 168  */
 169 BOOL PSDRV_Arc( DC *dc, INT left, INT top, INT right, INT bottom,
 170                   INT xstart, INT ystart, INT xend, INT yend )
 171 {
 172     return PSDRV_DrawArc( dc, left, top, right, bottom, xstart, ystart,
 173                          xend, yend, 0 );
 174 }
 175
 176 /***********************************************************************
 177  *           PSDRV_Chord
 178  */
 179 BOOL PSDRV_Chord( DC *dc, INT left, INT top, INT right, INT bottom,
 180                   INT xstart, INT ystart, INT xend, INT yend )
 181 {
 182     return PSDRV_DrawArc( dc, left, top, right, bottom, xstart, ystart,
 183                          xend, yend, 1 );
 184 }
 185
 186
 187 /***********************************************************************
 188  *           PSDRV_Pie
 189  */
 190 BOOL PSDRV_Pie( DC *dc, INT left, INT top, INT right, INT bottom,
 191                   INT xstart, INT ystart, INT xend, INT yend )
 192 {
 193     return PSDRV_DrawArc( dc, left, top, right, bottom, xstart, ystart,
 194                          xend, yend, 2 );
 195 }
 196
 197
 198 /***********************************************************************
 199  *           PSDRV_Ellipse
 200  */
 201 BOOL PSDRV_Ellipse( DC *dc, INT left, INT top, INT right, INT bottom)
 202 {
 203     INT x, y, w, h;
 204
 205     TRACE(psdrv, "%d %d - %d %d\n", left, top, right, bottom);
 206
 207     x = XLPTODP(dc, (left + right)/2);
 208     y = YLPTODP(dc, (top + bottom)/2);
 209
 210     w = XLSTODS(dc, (right - left));
 211     h = YLSTODS(dc, (bottom - top));
 212
 213     PSDRV_WriteArc(dc, x, y, w, h, 0.0, 360.0);
 214     PSDRV_WriteClosePath(dc);
 215     PSDRV_Brush(dc,0);
 216     PSDRV_SetPen(dc);
 217     PSDRV_WriteStroke(dc);
 218     return TRUE;
 219 }
 220
 221
 222 /***********************************************************************
 223  *           PSDRV_PolyPolyline
 224  */
 225 BOOL PSDRV_PolyPolyline( DC *dc, const POINT* pts, const DWORD* counts,
 226                            DWORD polylines )
 227 {
 228     DWORD polyline, line;
 229     const POINT* pt;
 230     TRACE(psdrv, "\n");
 231
 232     pt = pts;
 233     for(polyline = 0; polyline < polylines; polyline++) {
 234         PSDRV_WriteMoveTo(dc, XLPTODP(dc, pt->x), YLPTODP(dc, pt->y));
 235         pt++;
 236         for(line = 1; line < counts[polyline]; line++) {
 237             PSDRV_WriteLineTo(dc, XLPTODP(dc, pt->x), YLPTODP(dc, pt->y));
 238             pt++;
 239         }
 240     }
 241     PSDRV_SetPen(dc);
 242     PSDRV_WriteStroke(dc);
 243     return TRUE;
 244 }
 245
 246
 247 /***********************************************************************
 248  *           PSDRV_Polyline
 249  */
 250 BOOL PSDRV_Polyline( DC *dc, const POINT* pt, INT count )
 251 {
 252     return PSDRV_PolyPolyline( dc, pt, (LPDWORD) &count, 1 );
 253 }
 254
 255
 256 /***********************************************************************
 257  *           PSDRV_PolyPolygon
 258  */
 259 BOOL PSDRV_PolyPolygon( DC *dc, const POINT* pts, const INT* counts,
 260                           UINT polygons )
 261 {
 262     DWORD polygon, line;
 263     const POINT* pt;
 264     TRACE(psdrv, "\n");
 265
 266     pt = pts;
 267     for(polygon = 0; polygon < polygons; polygon++) {
 268         PSDRV_WriteMoveTo(dc, XLPTODP(dc, pt->x), YLPTODP(dc, pt->y));
 269         pt++;
 270         for(line = 1; line < counts[polygon]; line++) {
 271             PSDRV_WriteLineTo(dc, XLPTODP(dc, pt->x), YLPTODP(dc, pt->y));
 272             pt++;
 273         }
 274         PSDRV_WriteClosePath(dc);
 275     }
 276
 277     if(dc->w.polyFillMode == ALTERNATE)
 278         PSDRV_Brush(dc, 1);
 279     else /* WINDING */
 280         PSDRV_Brush(dc, 0);
 281     PSDRV_SetPen(dc);
 282     PSDRV_WriteStroke(dc);
 283     return TRUE;
 284 }
 285
 286
 287 /***********************************************************************
 288  *           PSDRV_Polygon
 289  */
 290 BOOL PSDRV_Polygon( DC *dc, const POINT* pt, INT count )
 291 {
 292      return PSDRV_PolyPolygon( dc, pt, &count, 1 );
 293 }
 294
 295
 296 /***********************************************************************
 297  *           PSDRV_SetPixel
 298  */
 299 COLORREF PSDRV_SetPixel( DC *dc, INT x, INT y, COLORREF color )
 300 {
 301     PSDRV_PDEVICE *physDev = (PSDRV_PDEVICE *)dc->physDev;
 302     PSCOLOR pscolor;
 303
 304     x = XLPTODP(dc, x);
 305     y = YLPTODP(dc, y);
 306
 307     PSDRV_WriteRectangle( dc, x, y, 0, 0 );
 308     PSDRV_CreateColor( physDev, &pscolor, color );
 309     PSDRV_WriteSetColor( dc, &pscolor );
 310     PSDRV_WriteFill( dc );
 311     return color;
 312 }