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 const REAL mm_per_inch = 25.4;
  39 static const REAL point_per_inch = 72.0;
  40
  41 static Status WINAPI NotificationHook(ULONG_PTR *token)
  42 {
  43     TRACE("%p\n", token);
  44     if(!token)
  45         return InvalidParameter;
  46
  47     return Ok;
  48 }
  49
  50 static void WINAPI NotificationUnhook(ULONG_PTR token)
  51 {
  52     TRACE("%ld\n", token);
  53 }
  54
  55 /*****************************************************
  56  *      DllMain
  57  */
  58 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved)
  59 {
  60     TRACE("(%p, %d, %p)\n", hinst, reason, reserved);
  61
  62     switch(reason)
  63     {
  64     case DLL_PROCESS_ATTACH:
  65         DisableThreadLibraryCalls( hinst );
  66         break;
  67
  68     case DLL_PROCESS_DETACH:
  69         free_installed_fonts();
  70         break;
  71     }
  72     return TRUE;
  73 }
  74
  75 /*****************************************************
  76  *      GdiplusStartup [GDIPLUS.@]
  77  */
  78 Status WINAPI GdiplusStartup(ULONG_PTR *token, const struct GdiplusStartupInput *input,
  79                              struct GdiplusStartupOutput *output)
  80 {
  81     if(!token || !input)
  82         return InvalidParameter;
  83
  84     TRACE("%p %p %p\n", token, input, output);
  85     TRACE("GdiplusStartupInput %d %p %d %d\n", input->GdiplusVersion,
  86           input->DebugEventCallback, input->SuppressBackgroundThread,
  87           input->SuppressExternalCodecs);
  88
  89     if(input->GdiplusVersion < 1 || input->GdiplusVersion > 2)
  90         return UnsupportedGdiplusVersion;
  91
  92     if(input->SuppressBackgroundThread){
  93         if(!output)
  94             return InvalidParameter;
  95
  96         output->NotificationHook = NotificationHook;
  97         output->NotificationUnhook = NotificationUnhook;
  98     }
  99
 100     *token = 0xdeadbeef;
 101
 102     /* FIXME: DebugEventCallback ignored */
 103
 104     return Ok;
 105 }
 106
 107 GpStatus WINAPI GdiplusNotificationHook(ULONG_PTR *token)
 108 {
 109     FIXME("%p\n", token);
 110     return NotificationHook(token);
 111 }
 112
 113 void WINAPI GdiplusNotificationUnhook(ULONG_PTR token)
 114 {
 115     FIXME("%ld\n", token);
 116     NotificationUnhook(token);
 117 }
 118
 119 /*****************************************************
 120  *      GdiplusShutdown [GDIPLUS.@]
 121  */
 122 ULONG WINAPI GdiplusShutdown_wrapper(ULONG_PTR token)
 123 {
 124     /* Notice the slightly different prototype from the official
 125      * signature which forces us to use the _wrapper suffix.
 126      */
 127
 128     /* FIXME: no object tracking */
 129
 130     /* "bricksntiles" expects a return value of 0, which native
 131      * coincidentally gives.
 132      */
 133     return 0;
 134 }
 135
 136 /*****************************************************
 137  *      GdipAlloc [GDIPLUS.@]
 138  */
 139 void* WINGDIPAPI GdipAlloc(SIZE_T size)
 140 {
 141     return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
 142 }
 143
 144 /*****************************************************
 145  *      GdipFree [GDIPLUS.@]
 146  */
 147 void WINGDIPAPI GdipFree(void* ptr)
 148 {
 149     HeapFree(GetProcessHeap(), 0, ptr);
 150 }
 151
 152 /* Calculates the bezier points needed to fill in the arc portion starting at
 153  * angle start and ending at end.  These two angles should be no more than 90
 154  * degrees from each other.  x1, y1, x2, y2 describes the bounding box (upper
 155  * left and width and height).  Angles must be in radians. write_first indicates
 156  * that the first bezier point should be written out (usually this is false).
 157  * pt is the array of GpPointFs that gets written to.
 158  **/
 159 static void add_arc_part(GpPointF * pt, REAL x1, REAL y1, REAL x2, REAL y2,
 160     REAL start, REAL end, BOOL write_first)
 161 {
 162     REAL center_x, center_y, rad_x, rad_y, cos_start, cos_end,
 163         sin_start, sin_end, a, half;
 164     INT i;
 165
 166     rad_x = x2 / 2.0;
 167     rad_y = y2 / 2.0;
 168     center_x = x1 + rad_x;
 169     center_y = y1 + rad_y;
 170
 171     cos_start = cos(start);
 172     cos_end = cos(end);
 173     sin_start = sin(start);
 174     sin_end = sin(end);
 175
 176     half = (end - start) / 2.0;
 177     a = 4.0 / 3.0 * (1 - cos(half)) / sin(half);
 178
 179     if(write_first){
 180         pt[0].X = cos_start;
 181         pt[0].Y = sin_start;
 182     }
 183     pt[1].X = cos_start - a * sin_start;
 184     pt[1].Y = sin_start + a * cos_start;
 185
 186     pt[3].X = cos_end;
 187     pt[3].Y = sin_end;
 188     pt[2].X = cos_end + a * sin_end;
 189     pt[2].Y = sin_end - a * cos_end;
 190
 191     /* expand the points back from the unit circle to the ellipse */
 192     for(i = (write_first ? 0 : 1); i < 4; i ++){
 193         pt[i].X = pt[i].X * rad_x + center_x;
 194         pt[i].Y = pt[i].Y * rad_y + center_y;
 195     }
 196 }
 197
 198 /* We plot the curve as if it is on a circle then stretch the points.  This
 199  * adjusts the angles so that when we stretch the points they will end in the
 200  * right place. This is only complicated because atan and atan2 do not behave
 201  * conveniently. */
 202 static void unstretch_angle(REAL * angle, REAL rad_x, REAL rad_y)
 203 {
 204     REAL stretched;
 205     INT revs_off;
 206
 207     *angle = deg2rad(*angle);
 208
 209     if(fabs(cos(*angle)) < 0.00001 || fabs(sin(*angle)) < 0.00001)
 210         return;
 211
 212     stretched = gdiplus_atan2(sin(*angle) / fabs(rad_y), cos(*angle) / fabs(rad_x));
 213     revs_off = roundr(*angle / (2.0 * M_PI)) - roundr(stretched / (2.0 * M_PI));
 214     stretched += ((REAL)revs_off) * M_PI * 2.0;
 215     *angle = stretched;
 216 }
 217
 218 /* Stores the bezier points that correspond to the arc in points.  If points is
 219  * null, just return the number of points needed to represent the arc. */
 220 INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
 221     REAL startAngle, REAL sweepAngle)
 222 {
 223     INT i;
 224     REAL end_angle, start_angle, endAngle;
 225
 226     endAngle = startAngle + sweepAngle;
 227     unstretch_angle(&startAngle, x2 / 2.0, y2 / 2.0);
 228     unstretch_angle(&endAngle, x2 / 2.0, y2 / 2.0);
 229
 230     /* start_angle and end_angle are the iterative variables */
 231     start_angle = startAngle;
 232
 233     for(i = 0; i < MAX_ARC_PTS - 1; i += 3){
 234         /* check if we've overshot the end angle */
 235         if( sweepAngle > 0.0 )
 236         {
 237             if (start_angle >= endAngle) break;
 238             end_angle = min(start_angle + M_PI_2, endAngle);
 239         }
 240         else
 241         {
 242             if (start_angle <= endAngle) break;
 243             end_angle = max(start_angle - M_PI_2, endAngle);
 244         }
 245
 246         if (points)
 247             add_arc_part(&points[i], x1, y1, x2, y2, start_angle, end_angle, i == 0);
 248
 249         start_angle += M_PI_2 * (sweepAngle < 0.0 ? -1.0 : 1.0);
 250     }
 251
 252     if (i == 0) return 0;
 253     else return i+1;
 254 }
 255
 256 COLORREF ARGB2COLORREF(ARGB color)
 257 {
 258     /*
 259     Packing of these color structures:
 260     COLORREF:   00bbggrr
 261     ARGB:       aarrggbb
 262     FIXME:doesn't handle alpha channel
 263     */
 264     return ((color & 0x0000ff) << 16) +
 265            (color & 0x00ff00) +
 266            ((color & 0xff0000) >> 16);
 267 }
 268
 269 HBITMAP ARGB2BMP(ARGB color)
 270 {
 271     BITMAPINFO bi;
 272     HBITMAP result;
 273     RGBQUAD *bits;
 274     int alpha;
 275
 276     if ((color & 0xff000000) == 0xff000000) return 0;
 277
 278     bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
 279     bi.bmiHeader.biWidth = 1;
 280     bi.bmiHeader.biHeight = 1;
 281     bi.bmiHeader.biPlanes = 1;
 282     bi.bmiHeader.biBitCount = 32;
 283     bi.bmiHeader.biCompression = BI_RGB;
 284     bi.bmiHeader.biSizeImage = 0;
 285     bi.bmiHeader.biXPelsPerMeter = 0;
 286     bi.bmiHeader.biYPelsPerMeter = 0;
 287     bi.bmiHeader.biClrUsed = 0;
 288     bi.bmiHeader.biClrImportant = 0;
 289
 290     result = CreateDIBSection(0, &bi, DIB_RGB_COLORS, (void*)&bits, NULL, 0);
 291
 292     bits[0].rgbReserved = alpha = (color>>24)&0xff;
 293     bits[0].rgbRed = ((color>>16)&0xff)*alpha/255;
 294     bits[0].rgbGreen = ((color>>8)&0xff)*alpha/255;
 295     bits[0].rgbBlue = (color&0xff)*alpha/255;
 296
 297     return result;
 298 }
 299
 300 /* Like atan2, but puts angle in correct quadrant if dx is 0. */
 301 REAL gdiplus_atan2(REAL dy, REAL dx)
 302 {
 303     if((dx == 0.0) && (dy != 0.0))
 304         return dy > 0.0 ? M_PI_2 : -M_PI_2;
 305
 306     return atan2(dy, dx);
 307 }
 308
 309 GpStatus hresult_to_status(HRESULT res)
 310 {
 311     switch(res){
 312         case S_OK:
 313             return Ok;
 314         case E_OUTOFMEMORY:
 315             return OutOfMemory;
 316         case E_INVALIDARG:
 317             return InvalidParameter;
 318         default:
 319             return GenericError;
 320     }
 321 }
 322
 323 /* converts a given unit to its value in inches */
 324 REAL convert_unit(REAL logpixels, GpUnit unit)
 325 {
 326     switch(unit)
 327     {
 328         case UnitInch:
 329             return logpixels;
 330         case UnitPoint:
 331             return logpixels / 72.0;
 332         case UnitDocument:
 333             return logpixels / 300.0;
 334         case UnitMillimeter:
 335             return logpixels / 25.4;
 336         case UnitWorld:
 337             ERR("cannot convert UnitWorld\n");
 338             return 0.0;
 339         case UnitPixel:
 340         case UnitDisplay:
 341         default:
 342             return 1.0;
 343     }
 344 }
 345
 346 /* converts a given unit to its value in pixels */
 347 REAL units_to_pixels(REAL units, GpUnit unit, REAL dpi)
 348 {
 349     switch (unit)
 350     {
 351     case UnitPixel:
 352     case UnitWorld:
 353     case UnitDisplay:
 354         return units;
 355     case UnitPoint:
 356         return units * dpi / point_per_inch;
 357     case UnitInch:
 358         return units * dpi;
 359     case UnitDocument:
 360         return units * dpi / 300.0; /* Per MSDN */
 361     case UnitMillimeter:
 362         return units * dpi / mm_per_inch;
 363     default:
 364         FIXME("Unhandled unit type: %d\n", unit);
 365         return 0;
 366     }
 367 }
 368
 369 /* converts value in pixels to a given unit */
 370 REAL pixels_to_units(REAL pixels, GpUnit unit, REAL dpi)
 371 {
 372     switch (unit)
 373     {
 374     case UnitPixel:
 375     case UnitWorld:
 376     case UnitDisplay:
 377         return pixels;
 378     case UnitPoint:
 379         return pixels * point_per_inch / dpi;
 380     case UnitInch:
 381         return pixels / dpi;
 382     case UnitDocument:
 383         return pixels * 300.0 / dpi;
 384     case UnitMillimeter:
 385         return pixels * mm_per_inch / dpi;
 386     default:
 387         FIXME("Unhandled unit type: %d\n", unit);
 388         return 0;
 389     }
 390 }
 391
 392 /* Calculates Bezier points from cardinal spline points. */
 393 void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
 394     REAL *y1, REAL *x2, REAL *y2)
 395 {
 396     REAL xdiff, ydiff;
 397
 398     /* calculate tangent */
 399     xdiff = pts[2].X - pts[0].X;
 400     ydiff = pts[2].Y - pts[0].Y;
 401
 402     /* apply tangent to get control points */
 403     *x1 = pts[1].X - tension * xdiff;
 404     *y1 = pts[1].Y - tension * ydiff;
 405     *x2 = pts[1].X + tension * xdiff;
 406     *y2 = pts[1].Y + tension * ydiff;
 407 }
 408
 409 /* Calculates Bezier points from cardinal spline endpoints. */
 410 void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
 411     REAL tension, REAL *x, REAL *y)
 412 {
 413     /* tangent at endpoints is the line from the endpoint to the adjacent point */
 414     *x = roundr(tension * (xadj - xend) + xend);
 415     *y = roundr(tension * (yadj - yend) + yend);
 416 }
 417
 418 /* make sure path has enough space for len more points */
 419 BOOL lengthen_path(GpPath *path, INT len)
 420 {
 421     /* initial allocation */
 422     if(path->datalen == 0){
 423         path->datalen = len * 2;
 424
 425         path->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
 426         if(!path->pathdata.Points)   return FALSE;
 427
 428         path->pathdata.Types = GdipAlloc(path->datalen);
 429         if(!path->pathdata.Types){
 430             GdipFree(path->pathdata.Points);
 431             return FALSE;
 432         }
 433     }
 434     /* reallocation, double size of arrays */
 435     else if(path->datalen - path->pathdata.Count < len){
 436         while(path->datalen - path->pathdata.Count < len)
 437             path->datalen *= 2;
 438
 439         path->pathdata.Points = HeapReAlloc(GetProcessHeap(), 0,
 440             path->pathdata.Points, path->datalen * sizeof(PointF));
 441         if(!path->pathdata.Points)  return FALSE;
 442
 443         path->pathdata.Types = HeapReAlloc(GetProcessHeap(), 0,
 444             path->pathdata.Types, path->datalen);
 445         if(!path->pathdata.Types)   return FALSE;
 446     }
 447
 448     return TRUE;
 449 }
 450
 451 void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
 452     BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride)
 453 {
 454     INT x, y;
 455     for (y=0; y<height; y++)
 456     {
 457         const BYTE *src=src_bits+y*src_stride;
 458         BYTE *dst=dst_bits+y*dst_stride;
 459         for (x=0; x<width; x++)
 460         {
 461             BYTE alpha=src[3];
 462             *dst++ = *src++ * alpha / 255;
 463             *dst++ = *src++ * alpha / 255;
 464             *dst++ = *src++ * alpha / 255;
 465             *dst++ = *src++;
 466         }
 467     }
 468 }
 469
 470 /* recursive deletion of GpRegion nodes */
 471 void delete_element(region_element* element)
 472 {
 473     switch(element->type)
 474     {
 475         case RegionDataRect:
 476             break;
 477         case RegionDataPath:
 478             GdipDeletePath(element->elementdata.pathdata.path);
 479             break;
 480         case RegionDataEmptyRect:
 481         case RegionDataInfiniteRect:
 482             break;
 483         default:
 484             delete_element(element->elementdata.combine.left);
 485             delete_element(element->elementdata.combine.right);
 486             GdipFree(element->elementdata.combine.left);
 487             GdipFree(element->elementdata.combine.right);
 488             break;
 489     }
 490 }
 491
 492 const char *debugstr_rectf(CONST RectF* rc)
 493 {
 494     if (!rc) return "(null)";
 495     return wine_dbg_sprintf("(%0.2f,%0.2f,%0.2f,%0.2f)", rc->X, rc->Y, rc->Width, rc->Height);
 496 }
 497
 498 const char *debugstr_pointf(CONST PointF* pt)
 499 {
 500     if (!pt) return "(null)";
 501     return wine_dbg_sprintf("(%0.2f,%0.2f)", pt->X, pt->Y);
 502 }