dlls/gdiplus/pathiterator.c

   1 /*
   2  * Copyright (C) 2007 Google (Evan Stade)
   3  * Copyright (C) 2008 Nikolay Sivov <bunglehead at gmail dot com>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include <stdarg.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "wingdi.h"
  25
  26 #include "objbase.h"
  27
  28 #include "gdiplus.h"
  29 #include "gdiplus_private.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
  33
  34 GpStatus WINGDIPAPI GdipCreatePathIter(GpPathIterator **iterator, GpPath* path)
  35 {
  36     INT size;
  37
  38     TRACE("(%p, %p)\n", iterator, path);
  39
  40     if(!iterator)
  41         return InvalidParameter;
  42
  43     *iterator = heap_alloc_zero(sizeof(GpPathIterator));
  44     if(!*iterator)  return OutOfMemory;
  45
  46     if(path){
  47         size = path->pathdata.Count;
  48
  49         (*iterator)->pathdata.Types  = heap_alloc_zero(size);
  50         (*iterator)->pathdata.Points = heap_alloc_zero(size * sizeof(PointF));
  51
  52         memcpy((*iterator)->pathdata.Types, path->pathdata.Types, size);
  53         memcpy((*iterator)->pathdata.Points, path->pathdata.Points,size * sizeof(PointF));
  54         (*iterator)->pathdata.Count = size;
  55     }
  56     else{
  57         (*iterator)->pathdata.Types  = NULL;
  58         (*iterator)->pathdata.Points = NULL;
  59         (*iterator)->pathdata.Count  = 0;
  60     }
  61
  62     (*iterator)->subpath_pos  = 0;
  63     (*iterator)->marker_pos   = 0;
  64     (*iterator)->pathtype_pos = 0;
  65
  66     return Ok;
  67 }
  68
  69 GpStatus WINGDIPAPI GdipDeletePathIter(GpPathIterator *iter)
  70 {
  71     TRACE("(%p)\n", iter);
  72
  73     if(!iter)
  74         return InvalidParameter;
  75
  76     heap_free(iter->pathdata.Types);
  77     heap_free(iter->pathdata.Points);
  78     heap_free(iter);
  79
  80     return Ok;
  81 }
  82
  83 GpStatus WINGDIPAPI GdipPathIterCopyData(GpPathIterator* iterator,
  84     INT* resultCount, GpPointF* points, BYTE* types, INT startIndex, INT endIndex)
  85 {
  86     TRACE("(%p, %p, %p, %p, %d, %d)\n", iterator, resultCount, points, types,
  87            startIndex, endIndex);
  88
  89     if(!iterator || !types || !points)
  90         return InvalidParameter;
  91
  92     if(endIndex > iterator->pathdata.Count - 1 || startIndex < 0 ||
  93         endIndex < startIndex){
  94         *resultCount = 0;
  95         return Ok;
  96     }
  97
  98     *resultCount = endIndex - startIndex + 1;
  99
 100     memcpy(types, &(iterator->pathdata.Types[startIndex]), *resultCount);
 101     memcpy(points, &(iterator->pathdata.Points[startIndex]),
 102         *resultCount * sizeof(PointF));
 103
 104     return Ok;
 105 }
 106
 107 GpStatus WINGDIPAPI GdipPathIterHasCurve(GpPathIterator* iterator, BOOL* hasCurve)
 108 {
 109     INT i;
 110
 111     TRACE("(%p, %p)\n", iterator, hasCurve);
 112
 113     if(!iterator)
 114         return InvalidParameter;
 115
 116     *hasCurve = FALSE;
 117
 118     for(i = 0; i < iterator->pathdata.Count; i++)
 119         if((iterator->pathdata.Types[i] & PathPointTypePathTypeMask) == PathPointTypeBezier){
 120             *hasCurve = TRUE;
 121             break;
 122         }
 123
 124     return Ok;
 125 }
 126
 127 GpStatus WINGDIPAPI GdipPathIterGetSubpathCount(GpPathIterator* iterator, INT* count)
 128 {
 129     INT i;
 130
 131     TRACE("(%p, %p)\n", iterator, count);
 132
 133     if(!iterator || !count)
 134         return InvalidParameter;
 135
 136     *count = 0;
 137     for(i = 0; i < iterator->pathdata.Count; i++){
 138         if(iterator->pathdata.Types[i] == PathPointTypeStart)
 139             (*count)++;
 140     }
 141
 142     return Ok;
 143 }
 144
 145 GpStatus WINGDIPAPI GdipPathIterNextMarker(GpPathIterator* iterator, INT *resultCount,
 146     INT* startIndex, INT* endIndex)
 147 {
 148     INT i;
 149
 150     TRACE("(%p, %p, %p, %p)\n", iterator, resultCount, startIndex, endIndex);
 151
 152     if(!iterator || !startIndex || !endIndex)
 153         return InvalidParameter;
 154
 155     *resultCount = 0;
 156
 157     /* first call could start with second point as all subsequent, cause
 158        path couldn't contain only one */
 159     for(i = iterator->marker_pos + 1; i < iterator->pathdata.Count; i++){
 160         if((iterator->pathdata.Types[i] & PathPointTypePathMarker) ||
 161            (i == iterator->pathdata.Count - 1)){
 162             *startIndex = iterator->marker_pos;
 163             if(iterator->marker_pos > 0) (*startIndex)++;
 164             *endIndex   = iterator->marker_pos = i;
 165             *resultCount= *endIndex - *startIndex + 1;
 166             break;
 167         }
 168     }
 169
 170     return Ok;
 171 }
 172
 173 GpStatus WINGDIPAPI GdipPathIterNextMarkerPath(GpPathIterator* iterator, INT* result,
 174     GpPath* path)
 175 {
 176     INT start, end;
 177
 178     TRACE("(%p, %p, %p)\n", iterator, result, path);
 179
 180     if(!iterator || !result)
 181         return InvalidParameter;
 182
 183     GdipPathIterNextMarker(iterator, result, &start, &end);
 184     /* return path */
 185     if(((*result) > 0) && path){
 186         GdipResetPath(path);
 187
 188         if(!lengthen_path(path, *result))
 189             return OutOfMemory;
 190
 191         memcpy(path->pathdata.Points, &(iterator->pathdata.Points[start]), sizeof(GpPointF)*(*result));
 192         memcpy(path->pathdata.Types,  &(iterator->pathdata.Types[start]),  sizeof(BYTE)*(*result));
 193         path->pathdata.Count = *result;
 194     }
 195
 196     return Ok;
 197 }
 198
 199 GpStatus WINGDIPAPI GdipPathIterNextSubpath(GpPathIterator* iterator,
 200     INT *resultCount, INT* startIndex, INT* endIndex, BOOL* isClosed)
 201 {
 202     INT i, count;
 203
 204     TRACE("(%p, %p, %p, %p, %p)\n", iterator, resultCount, startIndex,
 205            endIndex, isClosed);
 206
 207     if(!iterator || !startIndex || !endIndex || !isClosed || !resultCount)
 208         return InvalidParameter;
 209
 210     count = iterator->pathdata.Count;
 211
 212     /* iterator created with NULL path */
 213     if(count == 0){
 214         *resultCount = 0;
 215         return Ok;
 216     }
 217
 218     if(iterator->subpath_pos == count){
 219         *startIndex = *endIndex = *resultCount = 0;
 220         *isClosed = TRUE;
 221         return Ok;
 222     }
 223
 224     *startIndex = iterator->subpath_pos;
 225
 226     for(i = iterator->subpath_pos + 1; i < count &&
 227         !(iterator->pathdata.Types[i] == PathPointTypeStart); i++);
 228
 229     *endIndex = i - 1;
 230     iterator->subpath_pos = i;
 231
 232     *resultCount = *endIndex - *startIndex + 1;
 233
 234     if(iterator->pathdata.Types[*endIndex] & PathPointTypeCloseSubpath)
 235         *isClosed = TRUE;
 236     else
 237         *isClosed = FALSE;
 238
 239     return Ok;
 240 }
 241 GpStatus WINGDIPAPI GdipPathIterRewind(GpPathIterator *iterator)
 242 {
 243     TRACE("(%p)\n", iterator);
 244
 245     if(!iterator)
 246         return InvalidParameter;
 247
 248     iterator->subpath_pos = 0;
 249     iterator->marker_pos = 0;
 250     iterator->pathtype_pos = 0;
 251
 252     return Ok;
 253 }
 254
 255 GpStatus WINGDIPAPI GdipPathIterGetCount(GpPathIterator* iterator, INT* count)
 256 {
 257     TRACE("(%p, %p)\n", iterator, count);
 258
 259     if(!iterator || !count)
 260         return InvalidParameter;
 261
 262     *count = iterator->pathdata.Count;
 263
 264     return Ok;
 265 }
 266
 267 GpStatus WINGDIPAPI GdipPathIterEnumerate(GpPathIterator* iterator, INT* resultCount,
 268     GpPointF *points, BYTE *types, INT count)
 269 {
 270     TRACE("(%p, %p, %p, %p, %d)\n", iterator, resultCount, points, types, count);
 271
 272     if((count < 0) || !resultCount)
 273         return InvalidParameter;
 274
 275     if(count == 0){
 276         *resultCount = 0;
 277         return Ok;
 278     }
 279
 280     return GdipPathIterCopyData(iterator, resultCount, points, types, 0, count-1);
 281 }
 282
 283 GpStatus WINGDIPAPI GdipPathIterIsValid(GpPathIterator* iterator, BOOL* valid)
 284 {
 285     TRACE("(%p, %p)\n", iterator, valid);
 286
 287     if(!iterator || !valid)
 288         return InvalidParameter;
 289
 290     *valid = TRUE;
 291
 292     return Ok;
 293 }
 294
 295 GpStatus WINGDIPAPI GdipPathIterNextPathType(GpPathIterator* iter, INT* result,
 296     BYTE* type, INT* start, INT* end)
 297 {
 298     FIXME("(%p, %p, %p, %p, %p) stub\n", iter, result, type, start, end);
 299
 300     if(!iter || !result || !type || !start || !end)
 301         return InvalidParameter;
 302
 303     return NotImplemented;
 304 }
 305
 306 GpStatus WINGDIPAPI GdipPathIterNextSubpathPath(GpPathIterator* iter, INT* result,
 307     GpPath* path, BOOL* closed)
 308 {
 309     INT start, end;
 310
 311     TRACE("(%p, %p, %p, %p)\n", iter, result, path, closed);
 312
 313     if(!iter || !result || !closed)
 314         return InvalidParameter;
 315
 316     GdipPathIterNextSubpath(iter, result, &start, &end, closed);
 317     /* return path */
 318     if(((*result) > 0) && path){
 319         GdipResetPath(path);
 320
 321         if(!lengthen_path(path, *result))
 322             return OutOfMemory;
 323
 324         memcpy(path->pathdata.Points, &(iter->pathdata.Points[start]), sizeof(GpPointF)*(*result));
 325         memcpy(path->pathdata.Types,  &(iter->pathdata.Types[start]),  sizeof(BYTE)*(*result));
 326         path->pathdata.Count = *result;
 327     }
 328
 329     return Ok;
 330 }