dlls/gdiplus/gdiplus.c

   1 /*
   2  * Copyright (C) 2007 Google (Evan Stade)
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20 #include <math.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winerror.h"
  25 #include "wine/debug.h"
  26 #include "wingdi.h"
  27
  28 #include "objbase.h"
  29
  30 #include "winreg.h"
  31 #include "shlwapi.h"
  32
  33 #include "gdiplus.h"
  34 #include "gdiplus_private.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
  37
  38 static Status WINAPI NotificationHook(ULONG_PTR *token)
  39 {
  40     TRACE("%p\n", token);
  41     if(!token)
  42         return InvalidParameter;
  43
  44     return Ok;
  45 }
  46
  47 static void WINAPI NotificationUnhook(ULONG_PTR token)
  48 {
  49     TRACE("%ld\n", token);
  50 }
  51
  52 /*****************************************************
  53  *      DllMain
  54  */
  55 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved)
  56 {
  57     TRACE("(%p, %d, %p)\n", hinst, reason, reserved);
  58
  59     switch(reason)
  60     {
  61     case DLL_PROCESS_ATTACH:
  62         DisableThreadLibraryCalls( hinst );
  63         break;
  64
  65     case DLL_PROCESS_DETACH:
  66         free_installed_fonts();
  67         break;
  68     }
  69     return TRUE;
  70 }
  71
  72 /*****************************************************
  73  *      GdiplusStartup [GDIPLUS.@]
  74  */
  75 Status WINAPI GdiplusStartup(ULONG_PTR *token, const struct GdiplusStartupInput *input,
  76                              struct GdiplusStartupOutput *output)
  77 {
  78     if(!token || !input)
  79         return InvalidParameter;
  80
  81     TRACE("%p %p %p\n", token, input, output);
  82     TRACE("GdiplusStartupInput %d %p %d %d\n", input->GdiplusVersion,
  83           input->DebugEventCallback, input->SuppressBackgroundThread,
  84           input->SuppressExternalCodecs);
  85
  86     if(input->GdiplusVersion < 1 || input->GdiplusVersion > 2)
  87         return UnsupportedGdiplusVersion;
  88
  89     if(input->SuppressBackgroundThread){
  90         if(!output)
  91             return InvalidParameter;
  92
  93         output->NotificationHook = NotificationHook;
  94         output->NotificationUnhook = NotificationUnhook;
  95     }
  96
  97     *token = 0xdeadbeef;
  98
  99     /* FIXME: DebugEventCallback ignored */
 100
 101     return Ok;
 102 }
 103
 104 GpStatus WINAPI GdiplusNotificationHook(ULONG_PTR *token)
 105 {
 106     FIXME("%p\n", token);
 107     return NotificationHook(token);
 108 }
 109
 110 void WINAPI GdiplusNotificationUnhook(ULONG_PTR token)
 111 {
 112     FIXME("%ld\n", token);
 113     NotificationUnhook(token);
 114 }
 115
 116 /*****************************************************
 117  *      GdiplusShutdown [GDIPLUS.@]
 118  */
 119 void WINAPI GdiplusShutdown(ULONG_PTR token)
 120 {
 121     /* FIXME: no object tracking */
 122 }
 123
 124 /* "bricksntiles" expects a return value of 0, which native coincidentally gives */
 125 ULONG WINAPI GdiplusShutdown_wrapper(ULONG_PTR token)
 126 {
 127     GdiplusShutdown(token);
 128
 129     return 0;
 130 }
 131
 132 /*****************************************************
 133  *      GdipAlloc [GDIPLUS.@]
 134  */
 135 void* WINGDIPAPI GdipAlloc(SIZE_T size)
 136 {
 137     return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
 138 }
 139
 140 /*****************************************************
 141  *      GdipFree [GDIPLUS.@]
 142  */
 143 void WINGDIPAPI GdipFree(void* ptr)
 144 {
 145     HeapFree(GetProcessHeap(), 0, ptr);
 146 }
 147
 148 /* Calculates the bezier points needed to fill in the arc portion starting at
 149  * angle start and ending at end.  These two angles should be no more than 90
 150  * degrees from each other.  x1, y1, x2, y2 describes the bounding box (upper
 151  * left and width and height).  Angles must be in radians. write_first indicates
 152  * that the first bezier point should be written out (usually this is false).
 153  * pt is the array of GpPointFs that gets written to.
 154  **/
 155 static void add_arc_part(GpPointF * pt, REAL x1, REAL y1, REAL x2, REAL y2,
 156     REAL start, REAL end, BOOL write_first)
 157 {
 158     REAL center_x, center_y, rad_x, rad_y, cos_start, cos_end,
 159         sin_start, sin_end, a, half;
 160     INT i;
 161
 162     rad_x = x2 / 2.0;
 163     rad_y = y2 / 2.0;
 164     center_x = x1 + rad_x;
 165     center_y = y1 + rad_y;
 166
 167     cos_start = cos(start);
 168     cos_end = cos(end);
 169     sin_start = sin(start);
 170     sin_end = sin(end);
 171
 172     half = (end - start) / 2.0;
 173     a = 4.0 / 3.0 * (1 - cos(half)) / sin(half);
 174
 175     if(write_first){
 176         pt[0].X = cos_start;
 177         pt[0].Y = sin_start;
 178     }
 179     pt[1].X = cos_start - a * sin_start;
 180     pt[1].Y = sin_start + a * cos_start;
 181
 182     pt[3].X = cos_end;
 183     pt[3].Y = sin_end;
 184     pt[2].X = cos_end + a * sin_end;
 185     pt[2].Y = sin_end - a * cos_end;
 186
 187     /* expand the points back from the unit circle to the ellipse */
 188     for(i = (write_first ? 0 : 1); i < 4; i ++){
 189         pt[i].X = pt[i].X * rad_x + center_x;
 190         pt[i].Y = pt[i].Y * rad_y + center_y;
 191     }
 192 }
 193
 194 /* We plot the curve as if it is on a circle then stretch the points.  This
 195  * adjusts the angles so that when we stretch the points they will end in the
 196  * right place. This is only complicated because atan and atan2 do not behave
 197  * conveniently. */
 198 static void unstretch_angle(REAL * angle, REAL rad_x, REAL rad_y)
 199 {
 200     REAL stretched;
 201     INT revs_off;
 202
 203     *angle = deg2rad(*angle);
 204
 205     if(fabs(cos(*angle)) < 0.00001 || fabs(sin(*angle)) < 0.00001)
 206         return;
 207
 208     stretched = gdiplus_atan2(sin(*angle) / fabs(rad_y), cos(*angle) / fabs(rad_x));
 209     revs_off = roundr(*angle / (2.0 * M_PI)) - roundr(stretched / (2.0 * M_PI));
 210     stretched += ((REAL)revs_off) * M_PI * 2.0;
 211     *angle = stretched;
 212 }
 213
 214 /* Stores the bezier points that correspond to the arc in points.  If points is
 215  * null, just return the number of points needed to represent the arc. */
 216 INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
 217     REAL startAngle, REAL sweepAngle)
 218 {
 219     INT i;
 220     REAL end_angle, start_angle, endAngle;
 221
 222     endAngle = startAngle + sweepAngle;
 223     unstretch_angle(&startAngle, x2 / 2.0, y2 / 2.0);
 224     unstretch_angle(&endAngle, x2 / 2.0, y2 / 2.0);
 225
 226     /* start_angle and end_angle are the iterative variables */
 227     start_angle = startAngle;
 228
 229     for(i = 0; i < MAX_ARC_PTS - 1; i += 3){
 230         /* check if we've overshot the end angle */
 231         if( sweepAngle > 0.0 )
 232         {
 233             if (start_angle >= endAngle) break;
 234             end_angle = min(start_angle + M_PI_2, endAngle);
 235         }
 236         else
 237         {
 238             if (start_angle <= endAngle) break;
 239             end_angle = max(start_angle - M_PI_2, endAngle);
 240         }
 241
 242         if (points)
 243             add_arc_part(&points[i], x1, y1, x2, y2, start_angle, end_angle, i == 0);
 244
 245         start_angle += M_PI_2 * (sweepAngle < 0.0 ? -1.0 : 1.0);
 246     }
 247
 248     if (i == 0) return 0;
 249     else return i+1;
 250 }
 251
 252 COLORREF ARGB2COLORREF(ARGB color)
 253 {
 254     /*
 255     Packing of these color structures:
 256     COLORREF:   00bbggrr
 257     ARGB:       aarrggbb
 258     FIXME:doesn't handle alpha channel
 259     */
 260     return ((color & 0x0000ff) << 16) +
 261            (color & 0x00ff00) +
 262            ((color & 0xff0000) >> 16);
 263 }
 264
 265 HBITMAP ARGB2BMP(ARGB color)
 266 {
 267     HDC hdc;
 268     BITMAPINFO bi;
 269     HBITMAP result;
 270     RGBQUAD *bits;
 271     int alpha;
 272
 273     if ((color & 0xff000000) == 0xff000000) return 0;
 274
 275     hdc = CreateCompatibleDC(NULL);
 276
 277     bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
 278     bi.bmiHeader.biWidth = 1;
 279     bi.bmiHeader.biHeight = 1;
 280     bi.bmiHeader.biPlanes = 1;
 281     bi.bmiHeader.biBitCount = 32;
 282     bi.bmiHeader.biCompression = BI_RGB;
 283     bi.bmiHeader.biSizeImage = 0;
 284     bi.bmiHeader.biXPelsPerMeter = 0;
 285     bi.bmiHeader.biYPelsPerMeter = 0;
 286     bi.bmiHeader.biClrUsed = 0;
 287     bi.bmiHeader.biClrImportant = 0;
 288
 289     result = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, (void*)&bits, NULL, 0);
 290
 291     bits[0].rgbReserved = alpha = (color>>24)&0xff;
 292     bits[0].rgbRed = ((color>>16)&0xff)*alpha/255;
 293     bits[0].rgbGreen = ((color>>8)&0xff)*alpha/255;
 294     bits[0].rgbBlue = (color&0xff)*alpha/255;
 295
 296     DeleteDC(hdc);
 297
 298     return result;
 299 }
 300
 301 /* Like atan2, but puts angle in correct quadrant if dx is 0. */
 302 REAL gdiplus_atan2(REAL dy, REAL dx)
 303 {
 304     if((dx == 0.0) && (dy != 0.0))
 305         return dy > 0.0 ? M_PI_2 : -M_PI_2;
 306
 307     return atan2(dy, dx);
 308 }
 309
 310 GpStatus hresult_to_status(HRESULT res)
 311 {
 312     switch(res){
 313         case S_OK:
 314             return Ok;
 315         case E_OUTOFMEMORY:
 316             return OutOfMemory;
 317         case E_INVALIDARG:
 318             return InvalidParameter;
 319         default:
 320             return GenericError;
 321     }
 322 }
 323
 324 /* converts a given unit to its value in pixels */
 325 REAL convert_unit(REAL logpixels, GpUnit unit)
 326 {
 327     switch(unit)
 328     {
 329         case UnitInch:
 330             return logpixels;
 331         case UnitPoint:
 332             return logpixels / 72.0;
 333         case UnitDocument:
 334             return logpixels / 300.0;
 335         case UnitMillimeter:
 336             return logpixels / 25.4;
 337         case UnitWorld:
 338             ERR("cannot convert UnitWorld\n");
 339             return 0.0;
 340         case UnitPixel:
 341         case UnitDisplay:
 342         default:
 343             return 1.0;
 344     }
 345 }
 346
 347 /* Calculates Bezier points from cardinal spline points. */
 348 void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
 349     REAL *y1, REAL *x2, REAL *y2)
 350 {
 351     REAL xdiff, ydiff;
 352
 353     /* calculate tangent */
 354     xdiff = pts[2].X - pts[0].X;
 355     ydiff = pts[2].Y - pts[0].Y;
 356
 357     /* apply tangent to get control points */
 358     *x1 = pts[1].X - tension * xdiff;
 359     *y1 = pts[1].Y - tension * ydiff;
 360     *x2 = pts[1].X + tension * xdiff;
 361     *y2 = pts[1].Y + tension * ydiff;
 362 }
 363
 364 /* Calculates Bezier points from cardinal spline endpoints. */
 365 void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
 366     REAL tension, REAL *x, REAL *y)
 367 {
 368     /* tangent at endpoints is the line from the endpoint to the adjacent point */
 369     *x = roundr(tension * (xadj - xend) + xend);
 370     *y = roundr(tension * (yadj - yend) + yend);
 371 }
 372
 373 /* make sure path has enough space for len more points */
 374 BOOL lengthen_path(GpPath *path, INT len)
 375 {
 376     /* initial allocation */
 377     if(path->datalen == 0){
 378         path->datalen = len * 2;
 379
 380         path->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
 381         if(!path->pathdata.Points)   return FALSE;
 382
 383         path->pathdata.Types = GdipAlloc(path->datalen);
 384         if(!path->pathdata.Types){
 385             GdipFree(path->pathdata.Points);
 386             return FALSE;
 387         }
 388     }
 389     /* reallocation, double size of arrays */
 390     else if(path->datalen - path->pathdata.Count < len){
 391         while(path->datalen - path->pathdata.Count < len)
 392             path->datalen *= 2;
 393
 394         path->pathdata.Points = HeapReAlloc(GetProcessHeap(), 0,
 395             path->pathdata.Points, path->datalen * sizeof(PointF));
 396         if(!path->pathdata.Points)  return FALSE;
 397
 398         path->pathdata.Types = HeapReAlloc(GetProcessHeap(), 0,
 399             path->pathdata.Types, path->datalen);
 400         if(!path->pathdata.Types)   return FALSE;
 401     }
 402
 403     return TRUE;
 404 }
 405
 406 void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
 407     BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride)
 408 {
 409     UINT x, y;
 410     for (y=0; y<height; y++)
 411     {
 412         const BYTE *src=src_bits+y*src_stride;
 413         BYTE *dst=dst_bits+y*dst_stride;
 414         for (x=0; x<width; x++)
 415         {
 416             BYTE alpha=src[3];
 417             *dst++ = *src++ * alpha / 255;
 418             *dst++ = *src++ * alpha / 255;
 419             *dst++ = *src++ * alpha / 255;
 420             *dst++ = *src++;
 421         }
 422     }
 423 }
 424
 425 /* recursive deletion of GpRegion nodes */
 426 void delete_element(region_element* element)
 427 {
 428     switch(element->type)
 429     {
 430         case RegionDataRect:
 431             break;
 432         case RegionDataPath:
 433             GdipDeletePath(element->elementdata.pathdata.path);
 434             break;
 435         case RegionDataEmptyRect:
 436         case RegionDataInfiniteRect:
 437             break;
 438         default:
 439             delete_element(element->elementdata.combine.left);
 440             delete_element(element->elementdata.combine.right);
 441             GdipFree(element->elementdata.combine.left);
 442             GdipFree(element->elementdata.combine.right);
 443             break;
 444     }
 445 }
 446
 447 const char *debugstr_rectf(CONST RectF* rc)
 448 {
 449     if (!rc) return "(null)";
 450     return wine_dbg_sprintf("(%0.2f,%0.2f,%0.2f,%0.2f)", rc->X, rc->Y, rc->Width, rc->Height);
 451 }
 452
 453 const char *debugstr_pointf(CONST PointF* pt)
 454 {
 455     if (!pt) return "(null)";
 456     return wine_dbg_sprintf("(%0.2f,%0.2f)", pt->X, pt->Y);
 457 }