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 /*****************************************************
 125  *      GdipAlloc [GDIPLUS.@]
 126  */
 127 void* WINGDIPAPI GdipAlloc(SIZE_T size)
 128 {
 129     return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
 130 }
 131
 132 /*****************************************************
 133  *      GdipFree [GDIPLUS.@]
 134  */
 135 void WINGDIPAPI GdipFree(void* ptr)
 136 {
 137     HeapFree(GetProcessHeap(), 0, ptr);
 138 }
 139
 140 /* Calculates the bezier points needed to fill in the arc portion starting at
 141  * angle start and ending at end.  These two angles should be no more than 90
 142  * degrees from each other.  x1, y1, x2, y2 describes the bounding box (upper
 143  * left and width and height).  Angles must be in radians. write_first indicates
 144  * that the first bezier point should be written out (usually this is false).
 145  * pt is the array of GpPointFs that gets written to.
 146  **/
 147 static void add_arc_part(GpPointF * pt, REAL x1, REAL y1, REAL x2, REAL y2,
 148     REAL start, REAL end, BOOL write_first)
 149 {
 150     REAL center_x, center_y, rad_x, rad_y, cos_start, cos_end,
 151         sin_start, sin_end, a, half;
 152     INT i;
 153
 154     rad_x = x2 / 2.0;
 155     rad_y = y2 / 2.0;
 156     center_x = x1 + rad_x;
 157     center_y = y1 + rad_y;
 158
 159     cos_start = cos(start);
 160     cos_end = cos(end);
 161     sin_start = sin(start);
 162     sin_end = sin(end);
 163
 164     half = (end - start) / 2.0;
 165     a = 4.0 / 3.0 * (1 - cos(half)) / sin(half);
 166
 167     if(write_first){
 168         pt[0].X = cos_start;
 169         pt[0].Y = sin_start;
 170     }
 171     pt[1].X = cos_start - a * sin_start;
 172     pt[1].Y = sin_start + a * cos_start;
 173
 174     pt[3].X = cos_end;
 175     pt[3].Y = sin_end;
 176     pt[2].X = cos_end + a * sin_end;
 177     pt[2].Y = sin_end - a * cos_end;
 178
 179     /* expand the points back from the unit circle to the ellipse */
 180     for(i = (write_first ? 0 : 1); i < 4; i ++){
 181         pt[i].X = pt[i].X * rad_x + center_x;
 182         pt[i].Y = pt[i].Y * rad_y + center_y;
 183     }
 184 }
 185
 186 /* We plot the curve as if it is on a circle then stretch the points.  This
 187  * adjusts the angles so that when we stretch the points they will end in the
 188  * right place. This is only complicated because atan and atan2 do not behave
 189  * conveniently. */
 190 static void unstretch_angle(REAL * angle, REAL rad_x, REAL rad_y)
 191 {
 192     REAL stretched;
 193     INT revs_off;
 194
 195     *angle = deg2rad(*angle);
 196
 197     if(fabs(cos(*angle)) < 0.00001 || fabs(sin(*angle)) < 0.00001)
 198         return;
 199
 200     stretched = gdiplus_atan2(sin(*angle) / fabs(rad_y), cos(*angle) / fabs(rad_x));
 201     revs_off = roundr(*angle / (2.0 * M_PI)) - roundr(stretched / (2.0 * M_PI));
 202     stretched += ((REAL)revs_off) * M_PI * 2.0;
 203     *angle = stretched;
 204 }
 205
 206 /* Stores the bezier points that correspond to the arc in points.  If points is
 207  * null, just return the number of points needed to represent the arc. */
 208 INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
 209     REAL startAngle, REAL sweepAngle)
 210 {
 211     INT i;
 212     REAL end_angle, start_angle, endAngle;
 213
 214     endAngle = startAngle + sweepAngle;
 215     unstretch_angle(&startAngle, x2 / 2.0, y2 / 2.0);
 216     unstretch_angle(&endAngle, x2 / 2.0, y2 / 2.0);
 217
 218     /* start_angle and end_angle are the iterative variables */
 219     start_angle = startAngle;
 220
 221     for(i = 0; i < MAX_ARC_PTS - 1; i += 3){
 222         /* check if we've overshot the end angle */
 223         if( sweepAngle > 0.0 )
 224         {
 225             if (start_angle >= endAngle) break;
 226             end_angle = min(start_angle + M_PI_2, endAngle);
 227         }
 228         else
 229         {
 230             if (start_angle <= endAngle) break;
 231             end_angle = max(start_angle - M_PI_2, endAngle);
 232         }
 233
 234         if (points)
 235             add_arc_part(&points[i], x1, y1, x2, y2, start_angle, end_angle, i == 0);
 236
 237         start_angle += M_PI_2 * (sweepAngle < 0.0 ? -1.0 : 1.0);
 238     }
 239
 240     if (i == 0) return 0;
 241     else return i+1;
 242 }
 243
 244 COLORREF ARGB2COLORREF(ARGB color)
 245 {
 246     /*
 247     Packing of these color structures:
 248     COLORREF:   00bbggrr
 249     ARGB:       aarrggbb
 250     FIXME:doesn't handle alpha channel
 251     */
 252     return ((color & 0x0000ff) << 16) +
 253            (color & 0x00ff00) +
 254            ((color & 0xff0000) >> 16);
 255 }
 256
 257 HBITMAP ARGB2BMP(ARGB color)
 258 {
 259     HDC hdc;
 260     BITMAPINFO bi;
 261     HBITMAP result;
 262     RGBQUAD *bits;
 263     int alpha;
 264
 265     if ((color & 0xff000000) == 0xff000000) return 0;
 266
 267     hdc = CreateCompatibleDC(NULL);
 268
 269     bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
 270     bi.bmiHeader.biWidth = 1;
 271     bi.bmiHeader.biHeight = 1;
 272     bi.bmiHeader.biPlanes = 1;
 273     bi.bmiHeader.biBitCount = 32;
 274     bi.bmiHeader.biCompression = BI_RGB;
 275     bi.bmiHeader.biSizeImage = 0;
 276     bi.bmiHeader.biXPelsPerMeter = 0;
 277     bi.bmiHeader.biYPelsPerMeter = 0;
 278     bi.bmiHeader.biClrUsed = 0;
 279     bi.bmiHeader.biClrImportant = 0;
 280
 281     result = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, (void*)&bits, NULL, 0);
 282
 283     bits[0].rgbReserved = alpha = (color>>24)&0xff;
 284     bits[0].rgbRed = ((color>>16)&0xff)*alpha/255;
 285     bits[0].rgbGreen = ((color>>8)&0xff)*alpha/255;
 286     bits[0].rgbBlue = (color&0xff)*alpha/255;
 287
 288     DeleteDC(hdc);
 289
 290     return result;
 291 }
 292
 293 /* Like atan2, but puts angle in correct quadrant if dx is 0. */
 294 REAL gdiplus_atan2(REAL dy, REAL dx)
 295 {
 296     if((dx == 0.0) && (dy != 0.0))
 297         return dy > 0.0 ? M_PI_2 : -M_PI_2;
 298
 299     return atan2(dy, dx);
 300 }
 301
 302 GpStatus hresult_to_status(HRESULT res)
 303 {
 304     switch(res){
 305         case S_OK:
 306             return Ok;
 307         case E_OUTOFMEMORY:
 308             return OutOfMemory;
 309         case E_INVALIDARG:
 310             return InvalidParameter;
 311         default:
 312             return GenericError;
 313     }
 314 }
 315
 316 /* converts a given unit to its value in pixels */
 317 REAL convert_unit(HDC hdc, GpUnit unit)
 318 {
 319     switch(unit)
 320     {
 321         case UnitInch:
 322             return (REAL) GetDeviceCaps(hdc, LOGPIXELSX);
 323         case UnitPoint:
 324             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 72.0;
 325         case UnitDocument:
 326             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 300.0;
 327         case UnitMillimeter:
 328             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 25.4;
 329         case UnitWorld:
 330             ERR("cannot convert UnitWorld\n");
 331             return 0.0;
 332         case UnitPixel:
 333         case UnitDisplay:
 334         default:
 335             return 1.0;
 336     }
 337 }
 338
 339 /* Calculates Bezier points from cardinal spline points. */
 340 void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
 341     REAL *y1, REAL *x2, REAL *y2)
 342 {
 343     REAL xdiff, ydiff;
 344
 345     /* calculate tangent */
 346     xdiff = pts[2].X - pts[0].X;
 347     ydiff = pts[2].Y - pts[0].Y;
 348
 349     /* apply tangent to get control points */
 350     *x1 = pts[1].X - tension * xdiff;
 351     *y1 = pts[1].Y - tension * ydiff;
 352     *x2 = pts[1].X + tension * xdiff;
 353     *y2 = pts[1].Y + tension * ydiff;
 354 }
 355
 356 /* Calculates Bezier points from cardinal spline endpoints. */
 357 void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
 358     REAL tension, REAL *x, REAL *y)
 359 {
 360     /* tangent at endpoints is the line from the endpoint to the adjacent point */
 361     *x = roundr(tension * (xadj - xend) + xend);
 362     *y = roundr(tension * (yadj - yend) + yend);
 363 }
 364
 365 /* make sure path has enough space for len more points */
 366 BOOL lengthen_path(GpPath *path, INT len)
 367 {
 368     /* initial allocation */
 369     if(path->datalen == 0){
 370         path->datalen = len * 2;
 371
 372         path->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
 373         if(!path->pathdata.Points)   return FALSE;
 374
 375         path->pathdata.Types = GdipAlloc(path->datalen);
 376         if(!path->pathdata.Types){
 377             GdipFree(path->pathdata.Points);
 378             return FALSE;
 379         }
 380     }
 381     /* reallocation, double size of arrays */
 382     else if(path->datalen - path->pathdata.Count < len){
 383         while(path->datalen - path->pathdata.Count < len)
 384             path->datalen *= 2;
 385
 386         path->pathdata.Points = HeapReAlloc(GetProcessHeap(), 0,
 387             path->pathdata.Points, path->datalen * sizeof(PointF));
 388         if(!path->pathdata.Points)  return FALSE;
 389
 390         path->pathdata.Types = HeapReAlloc(GetProcessHeap(), 0,
 391             path->pathdata.Types, path->datalen);
 392         if(!path->pathdata.Types)   return FALSE;
 393     }
 394
 395     return TRUE;
 396 }
 397
 398 void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
 399     BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride)
 400 {
 401     UINT x, y;
 402     for (y=0; y<height; y++)
 403     {
 404         const BYTE *src=src_bits+y*src_stride;
 405         BYTE *dst=dst_bits+y*dst_stride;
 406         for (x=0; x<width; x++)
 407         {
 408             BYTE alpha=src[3];
 409             *dst++ = *src++ * alpha / 255;
 410             *dst++ = *src++ * alpha / 255;
 411             *dst++ = *src++ * alpha / 255;
 412             *dst++ = *src++;
 413         }
 414     }
 415 }
 416
 417 /* recursive deletion of GpRegion nodes */
 418 void delete_element(region_element* element)
 419 {
 420     switch(element->type)
 421     {
 422         case RegionDataRect:
 423             break;
 424         case RegionDataPath:
 425             GdipDeletePath(element->elementdata.pathdata.path);
 426             break;
 427         case RegionDataEmptyRect:
 428         case RegionDataInfiniteRect:
 429             break;
 430         default:
 431             delete_element(element->elementdata.combine.left);
 432             delete_element(element->elementdata.combine.right);
 433             GdipFree(element->elementdata.combine.left);
 434             GdipFree(element->elementdata.combine.right);
 435             break;
 436     }
 437 }
 438
 439 const char *debugstr_rectf(CONST RectF* rc)
 440 {
 441     if (!rc) return "(null)";
 442     return wine_dbg_sprintf("(%0.2f,%0.2f,%0.2f,%0.2f)", rc->X, rc->Y, rc->Width, rc->Height);
 443 }
 444
 445 const char *debugstr_pointf(CONST PointF* pt)
 446 {
 447     if (!pt) return "(null)";
 448     return wine_dbg_sprintf("(%0.2f,%0.2f)", pt->X, pt->Y);
 449 }