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_WINE_PREATTACH:
  62         return FALSE;  /* prefer native version */
  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)
  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 void WINAPI GdiplusShutdown(ULONG_PTR token)
 123 {
 124     /* FIXME: no object tracking */
 125 }
 126
 127 /*****************************************************
 128  *      GdipAlloc [GDIPLUS.@]
 129  */
 130 void* WINGDIPAPI GdipAlloc(SIZE_T size)
 131 {
 132     return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
 133 }
 134
 135 /*****************************************************
 136  *      GdipFree [GDIPLUS.@]
 137  */
 138 void WINGDIPAPI GdipFree(void* ptr)
 139 {
 140     HeapFree(GetProcessHeap(), 0, ptr);
 141 }
 142
 143 /* Calculates the bezier points needed to fill in the arc portion starting at
 144  * angle start and ending at end.  These two angles should be no more than 90
 145  * degrees from each other.  x1, y1, x2, y2 describes the bounding box (upper
 146  * left and width and height).  Angles must be in radians. write_first indicates
 147  * that the first bezier point should be written out (usually this is false).
 148  * pt is the array of GpPointFs that gets written to.
 149  **/
 150 static void add_arc_part(GpPointF * pt, REAL x1, REAL y1, REAL x2, REAL y2,
 151     REAL start, REAL end, BOOL write_first)
 152 {
 153     REAL center_x, center_y, rad_x, rad_y, cos_start, cos_end,
 154         sin_start, sin_end, a, half;
 155     INT i;
 156
 157     rad_x = x2 / 2.0;
 158     rad_y = y2 / 2.0;
 159     center_x = x1 + rad_x;
 160     center_y = y1 + rad_y;
 161
 162     cos_start = cos(start);
 163     cos_end = cos(end);
 164     sin_start = sin(start);
 165     sin_end = sin(end);
 166
 167     half = (end - start) / 2.0;
 168     a = 4.0 / 3.0 * (1 - cos(half)) / sin(half);
 169
 170     if(write_first){
 171         pt[0].X = cos_start;
 172         pt[0].Y = sin_start;
 173     }
 174     pt[1].X = cos_start - a * sin_start;
 175     pt[1].Y = sin_start + a * cos_start;
 176
 177     pt[3].X = cos_end;
 178     pt[3].Y = sin_end;
 179     pt[2].X = cos_end + a * sin_end;
 180     pt[2].Y = sin_end - a * cos_end;
 181
 182     /* expand the points back from the unit circle to the ellipse */
 183     for(i = (write_first ? 0 : 1); i < 4; i ++){
 184         pt[i].X = pt[i].X * rad_x + center_x;
 185         pt[i].Y = pt[i].Y * rad_y + center_y;
 186     }
 187 }
 188
 189 /* We plot the curve as if it is on a circle then stretch the points.  This
 190  * adjusts the angles so that when we stretch the points they will end in the
 191  * right place. This is only complicated because atan and atan2 do not behave
 192  * conveniently. */
 193 static void unstretch_angle(REAL * angle, REAL rad_x, REAL rad_y)
 194 {
 195     REAL stretched;
 196     INT revs_off;
 197
 198     *angle = deg2rad(*angle);
 199
 200     if(fabs(cos(*angle)) < 0.00001 || fabs(sin(*angle)) < 0.00001)
 201         return;
 202
 203     stretched = gdiplus_atan2(sin(*angle) / fabs(rad_y), cos(*angle) / fabs(rad_x));
 204     revs_off = roundr(*angle / (2.0 * M_PI)) - roundr(stretched / (2.0 * M_PI));
 205     stretched += ((REAL)revs_off) * M_PI * 2.0;
 206     *angle = stretched;
 207 }
 208
 209 /* Stores the bezier points that correspond to the arc in points.  If points is
 210  * null, just return the number of points needed to represent the arc. */
 211 INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
 212     REAL startAngle, REAL sweepAngle)
 213 {
 214     INT i, count;
 215     REAL end_angle, start_angle, endAngle;
 216
 217     endAngle = startAngle + sweepAngle;
 218     unstretch_angle(&startAngle, x2 / 2.0, y2 / 2.0);
 219     unstretch_angle(&endAngle, x2 / 2.0, y2 / 2.0);
 220
 221     count = ceilf(fabs(endAngle - startAngle) / M_PI_2) * 3 + 1;
 222     /* don't make more than a full circle */
 223     count = min(MAX_ARC_PTS, count);
 224
 225     if(count == 1)
 226         return 0;
 227     if(!points)
 228         return count;
 229
 230     /* start_angle and end_angle are the iterative variables */
 231     start_angle = startAngle;
 232
 233     for(i = 0; i < count - 1; i += 3){
 234         /* check if we've overshot the end angle */
 235         if( sweepAngle > 0.0 )
 236             end_angle = min(start_angle + M_PI_2, endAngle);
 237         else
 238             end_angle = max(start_angle - M_PI_2, endAngle);
 239
 240         add_arc_part(&points[i], x1, y1, x2, y2, start_angle, end_angle, i == 0);
 241
 242         start_angle += M_PI_2 * (sweepAngle < 0.0 ? -1.0 : 1.0);
 243     }
 244
 245     return count;
 246 }
 247
 248 COLORREF ARGB2COLORREF(ARGB color)
 249 {
 250     /*
 251     Packing of these color structures:
 252     COLORREF:   00bbggrr
 253     ARGB:       aarrggbb
 254     FIXME:doesn't handle alpha channel
 255     */
 256     return ((color & 0x0000ff) << 16) +
 257            (color & 0x00ff00) +
 258            ((color & 0xff0000) >> 16);
 259 }
 260
 261 HBITMAP ARGB2BMP(ARGB color)
 262 {
 263     HDC hdc;
 264     BITMAPINFO bi;
 265     HBITMAP result;
 266     RGBQUAD *bits;
 267     int alpha;
 268
 269     if ((color & 0xff000000) == 0xff000000) return 0;
 270
 271     hdc = CreateCompatibleDC(NULL);
 272
 273     bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
 274     bi.bmiHeader.biWidth = 1;
 275     bi.bmiHeader.biHeight = 1;
 276     bi.bmiHeader.biPlanes = 1;
 277     bi.bmiHeader.biBitCount = 32;
 278     bi.bmiHeader.biCompression = BI_RGB;
 279     bi.bmiHeader.biSizeImage = 0;
 280     bi.bmiHeader.biXPelsPerMeter = 0;
 281     bi.bmiHeader.biYPelsPerMeter = 0;
 282     bi.bmiHeader.biClrUsed = 0;
 283     bi.bmiHeader.biClrImportant = 0;
 284
 285     result = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, (void*)&bits, NULL, 0);
 286
 287     bits[0].rgbReserved = alpha = (color>>24)&0xff;
 288     bits[0].rgbRed = ((color>>16)&0xff)*alpha/255;
 289     bits[0].rgbGreen = ((color>>8)&0xff)*alpha/255;
 290     bits[0].rgbBlue = (color&0xff)*alpha/255;
 291
 292     DeleteDC(hdc);
 293
 294     return result;
 295 }
 296
 297 /* Like atan2, but puts angle in correct quadrant if dx is 0. */
 298 REAL gdiplus_atan2(REAL dy, REAL dx)
 299 {
 300     if((dx == 0.0) && (dy != 0.0))
 301         return dy > 0.0 ? M_PI_2 : -M_PI_2;
 302
 303     return atan2(dy, dx);
 304 }
 305
 306 GpStatus hresult_to_status(HRESULT res)
 307 {
 308     switch(res){
 309         case S_OK:
 310             return Ok;
 311         case E_OUTOFMEMORY:
 312             return OutOfMemory;
 313         case E_INVALIDARG:
 314             return InvalidParameter;
 315         default:
 316             return GenericError;
 317     }
 318 }
 319
 320 /* converts a given unit to its value in pixels */
 321 REAL convert_unit(HDC hdc, GpUnit unit)
 322 {
 323     switch(unit)
 324     {
 325         case UnitInch:
 326             return (REAL) GetDeviceCaps(hdc, LOGPIXELSX);
 327         case UnitPoint:
 328             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 72.0;
 329         case UnitDocument:
 330             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 300.0;
 331         case UnitMillimeter:
 332             return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 25.4;
 333         case UnitWorld:
 334             ERR("cannot convert UnitWorld\n");
 335             return 0.0;
 336         case UnitPixel:
 337         case UnitDisplay:
 338         default:
 339             return 1.0;
 340     }
 341 }
 342
 343 /* Calculates Bezier points from cardinal spline points. */
 344 void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
 345     REAL *y1, REAL *x2, REAL *y2)
 346 {
 347     REAL xdiff, ydiff;
 348
 349     /* calculate tangent */
 350     xdiff = pts[2].X - pts[0].X;
 351     ydiff = pts[2].Y - pts[0].Y;
 352
 353     /* apply tangent to get control points */
 354     *x1 = pts[1].X - tension * xdiff;
 355     *y1 = pts[1].Y - tension * ydiff;
 356     *x2 = pts[1].X + tension * xdiff;
 357     *y2 = pts[1].Y + tension * ydiff;
 358 }
 359
 360 /* Calculates Bezier points from cardinal spline endpoints. */
 361 void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
 362     REAL tension, REAL *x, REAL *y)
 363 {
 364     /* tangent at endpoints is the line from the endpoint to the adjacent point */
 365     *x = roundr(tension * (xadj - xend) + xend);
 366     *y = roundr(tension * (yadj - yend) + yend);
 367 }
 368
 369 /* make sure path has enough space for len more points */
 370 BOOL lengthen_path(GpPath *path, INT len)
 371 {
 372     /* initial allocation */
 373     if(path->datalen == 0){
 374         path->datalen = len * 2;
 375
 376         path->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
 377         if(!path->pathdata.Points)   return FALSE;
 378
 379         path->pathdata.Types = GdipAlloc(path->datalen);
 380         if(!path->pathdata.Types){
 381             GdipFree(path->pathdata.Points);
 382             return FALSE;
 383         }
 384     }
 385     /* reallocation, double size of arrays */
 386     else if(path->datalen - path->pathdata.Count < len){
 387         while(path->datalen - path->pathdata.Count < len)
 388             path->datalen *= 2;
 389
 390         path->pathdata.Points = HeapReAlloc(GetProcessHeap(), 0,
 391             path->pathdata.Points, path->datalen * sizeof(PointF));
 392         if(!path->pathdata.Points)  return FALSE;
 393
 394         path->pathdata.Types = HeapReAlloc(GetProcessHeap(), 0,
 395             path->pathdata.Types, path->datalen);
 396         if(!path->pathdata.Types)   return FALSE;
 397     }
 398
 399     return TRUE;
 400 }
 401
 402 void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
 403     BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride)
 404 {
 405     UINT x, y;
 406     for (y=0; y<height; y++)
 407     {
 408         const BYTE *src=src_bits+y*src_stride;
 409         BYTE *dst=dst_bits+y*dst_stride;
 410         for (x=0; x<width; x++)
 411         {
 412             BYTE alpha=src[3];
 413             *dst++ = *src++ * alpha / 255;
 414             *dst++ = *src++ * alpha / 255;
 415             *dst++ = *src++ * alpha / 255;
 416             *dst++ = *src++;
 417         }
 418     }
 419 }
 420
 421 /* recursive deletion of GpRegion nodes */
 422 inline void delete_element(region_element* element)
 423 {
 424     switch(element->type)
 425     {
 426         case RegionDataRect:
 427             break;
 428         case RegionDataPath:
 429             GdipDeletePath(element->elementdata.pathdata.path);
 430             break;
 431         case RegionDataEmptyRect:
 432         case RegionDataInfiniteRect:
 433             break;
 434         default:
 435             delete_element(element->elementdata.combine.left);
 436             delete_element(element->elementdata.combine.right);
 437             GdipFree(element->elementdata.combine.left);
 438             GdipFree(element->elementdata.combine.right);
 439             break;
 440     }
 441 }
 442
 443 const char *debugstr_rectf(CONST RectF* rc)
 444 {
 445     if (!rc) return "(null)";
 446     return wine_dbg_sprintf("(%0.2f,%0.2f,%0.2f,%0.2f)", rc->X, rc->Y, rc->Width, rc->Height);
 447 }