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 inch_per_mm = 1.0 / 25.4;
  40 static const REAL point_per_inch = 72.0;
  41 static const REAL inch_per_point = 1.0 / 72.0;
  42
  43 static Status WINAPI NotificationHook(ULONG_PTR *token)
  44 {
  45     TRACE("%p\n", token);
  46     if(!token)
  47         return InvalidParameter;
  48
  49     return Ok;
  50 }
  51
  52 static void WINAPI NotificationUnhook(ULONG_PTR token)
  53 {
  54     TRACE("%Id\n", token);
  55 }
  56
  57 /*****************************************************
  58  *      DllMain
  59  */
  60 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved)
  61 {
  62     TRACE("(%p, %ld, %p)\n", hinst, reason, reserved);
  63
  64     switch(reason)
  65     {
  66     case DLL_PROCESS_ATTACH:
  67         DisableThreadLibraryCalls( hinst );
  68         init_generic_string_formats();
  69         break;
  70
  71     case DLL_PROCESS_DETACH:
  72         if (reserved) break;
  73         free_installed_fonts();
  74         free_generic_string_formats();
  75         break;
  76     }
  77     return TRUE;
  78 }
  79
  80 /*****************************************************
  81  *      GdiplusStartup [GDIPLUS.@]
  82  */
  83 Status WINAPI GdiplusStartup(ULONG_PTR *token, const struct GdiplusStartupInput *input,
  84                              struct GdiplusStartupOutput *output)
  85 {
  86     if(!token || !input)
  87         return InvalidParameter;
  88
  89     TRACE("%p %p %p\n", token, input, output);
  90     TRACE("GdiplusStartupInput %d %p %d %d\n", input->GdiplusVersion,
  91           input->DebugEventCallback, input->SuppressBackgroundThread,
  92           input->SuppressExternalCodecs);
  93
  94     if(input->GdiplusVersion < 1 || input->GdiplusVersion > 2)
  95         return UnsupportedGdiplusVersion;
  96
  97     if(input->SuppressBackgroundThread){
  98         if(!output)
  99             return InvalidParameter;
 100
 101         output->NotificationHook = NotificationHook;
 102         output->NotificationUnhook = NotificationUnhook;
 103     }
 104
 105     *token = 0xdeadbeef;
 106
 107     /* FIXME: DebugEventCallback ignored */
 108
 109     return Ok;
 110 }
 111
 112 GpStatus WINAPI GdiplusNotificationHook(ULONG_PTR *token)
 113 {
 114     FIXME("%p\n", token);
 115     return NotificationHook(token);
 116 }
 117
 118 void WINAPI GdiplusNotificationUnhook(ULONG_PTR token)
 119 {
 120     FIXME("%Id\n", token);
 121     NotificationUnhook(token);
 122 }
 123
 124 /*****************************************************
 125  *      GdiplusShutdown [GDIPLUS.@]
 126  */
 127 ULONG WINAPI GdiplusShutdown_wrapper(ULONG_PTR token)
 128 {
 129     /* Notice the slightly different prototype from the official
 130      * signature which forces us to use the _wrapper suffix.
 131      */
 132
 133     /* FIXME: no object tracking */
 134
 135     /* "bricksntiles" expects a return value of 0, which native
 136      * coincidentally gives.
 137      */
 138     return 0;
 139 }
 140
 141 /*****************************************************
 142  *      GdipAlloc [GDIPLUS.@]
 143  */
 144 void* WINGDIPAPI GdipAlloc(SIZE_T size)
 145 {
 146     return calloc(1, size);
 147 }
 148
 149 /*****************************************************
 150  *      GdipFree [GDIPLUS.@]
 151  */
 152 void WINGDIPAPI GdipFree(void* ptr)
 153 {
 154     free(ptr);
 155 }
 156
 157 /* Calculates the bezier points needed to fill in the arc portion starting at
 158  * angle start and ending at end.  These two angles should be no more than 90
 159  * degrees from each other.  x1, y1, x2, y2 describes the bounding box (upper
 160  * left and width and height).  Angles must be in radians. write_first indicates
 161  * that the first bezier point should be written out (usually this is false).
 162  * pt is the array of GpPointFs that gets written to.
 163  **/
 164 static void add_arc_part(GpPointF * pt, REAL x1, REAL y1, REAL x2, REAL y2,
 165     REAL start, REAL end, BOOL write_first)
 166 {
 167     REAL center_x, center_y, rad_x, rad_y, cos_start, cos_end,
 168         sin_start, sin_end, a, half;
 169     INT i;
 170
 171     rad_x = x2 / 2.0;
 172     rad_y = y2 / 2.0;
 173     center_x = x1 + rad_x;
 174     center_y = y1 + rad_y;
 175
 176     cos_start = cos(start);
 177     cos_end = cos(end);
 178     sin_start = sin(start);
 179     sin_end = sin(end);
 180
 181     half = (end - start) / 2.0;
 182     a = 4.0 / 3.0 * (1 - cos(half)) / sin(half);
 183
 184     if(write_first){
 185         pt[0].X = cos_start;
 186         pt[0].Y = sin_start;
 187     }
 188     pt[1].X = cos_start - a * sin_start;
 189     pt[1].Y = sin_start + a * cos_start;
 190
 191     pt[3].X = cos_end;
 192     pt[3].Y = sin_end;
 193     pt[2].X = cos_end + a * sin_end;
 194     pt[2].Y = sin_end - a * cos_end;
 195
 196     /* expand the points back from the unit circle to the ellipse */
 197     for(i = (write_first ? 0 : 1); i < 4; i ++){
 198         pt[i].X = pt[i].X * rad_x + center_x;
 199         pt[i].Y = pt[i].Y * rad_y + center_y;
 200     }
 201 }
 202
 203 /* We plot the curve as if it is on a circle then stretch the points.  This
 204  * adjusts the angles so that when we stretch the points they will end in the
 205  * right place. This is only complicated because atan and atan2 do not behave
 206  * conveniently. */
 207 static REAL unstretch_angle(REAL angle, REAL dia_x, REAL dia_y)
 208 {
 209     REAL stretched;
 210     INT revs_off;
 211
 212     if(fabs(cos(angle)) < 0.00001 || fabs(sin(angle)) < 0.00001)
 213         return angle;
 214
 215     stretched = gdiplus_atan2(sin(angle) / fabs(dia_y), cos(angle) / fabs(dia_x));
 216     revs_off = gdip_round(angle / (2.0 * M_PI)) - gdip_round(stretched / (2.0 * M_PI));
 217     stretched += ((REAL)revs_off) * M_PI * 2.0;
 218     return stretched;
 219 }
 220
 221 /* Stores the bezier points that correspond to the arc in points.  If points is
 222  * null, just return the number of points needed to represent the arc. */
 223 INT arc2polybezier(GpPointF * points, REAL left, REAL top, REAL width, REAL height,
 224     REAL start_angle, REAL sweep_angle)
 225 {
 226     INT i;
 227     REAL partial_end_angle, end_angle;
 228
 229     end_angle = deg2rad(start_angle + sweep_angle);
 230     start_angle = deg2rad(start_angle);
 231
 232     if (width != height)
 233     {
 234         start_angle = unstretch_angle(start_angle, width, height);
 235         end_angle = unstretch_angle(end_angle, width, height);
 236     }
 237
 238     for(i = 0; i < MAX_ARC_PTS - 1; i += 3){
 239         /* check if we've overshot the end angle */
 240         if( sweep_angle > 0.0 )
 241         {
 242             if (start_angle >= end_angle) break;
 243             partial_end_angle = min(start_angle + M_PI_2, end_angle);
 244         }
 245         else
 246         {
 247             if (start_angle <= end_angle) break;
 248             partial_end_angle = max(start_angle - M_PI_2, end_angle);
 249         }
 250
 251         if (points)
 252             add_arc_part(&points[i], left, top, width, height, start_angle, partial_end_angle, i == 0);
 253
 254         start_angle = partial_end_angle;
 255     }
 256
 257     if (i == 0) return 0;
 258     else return i+1;
 259 }
 260
 261 COLORREF ARGB2COLORREF(ARGB color)
 262 {
 263     /*
 264     Packing of these color structures:
 265     COLORREF:   00bbggrr
 266     ARGB:       aarrggbb
 267     FIXME:doesn't handle alpha channel
 268     */
 269     return ((color & 0x0000ff) << 16) +
 270            (color & 0x00ff00) +
 271            ((color & 0xff0000) >> 16);
 272 }
 273
 274 HBITMAP ARGB2BMP(ARGB color)
 275 {
 276     BITMAPINFO bi;
 277     HBITMAP result;
 278     RGBQUAD *bits;
 279     int alpha;
 280
 281     if ((color & 0xff000000) == 0xff000000) return 0;
 282
 283     bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
 284     bi.bmiHeader.biWidth = 1;
 285     bi.bmiHeader.biHeight = 1;
 286     bi.bmiHeader.biPlanes = 1;
 287     bi.bmiHeader.biBitCount = 32;
 288     bi.bmiHeader.biCompression = BI_RGB;
 289     bi.bmiHeader.biSizeImage = 0;
 290     bi.bmiHeader.biXPelsPerMeter = 0;
 291     bi.bmiHeader.biYPelsPerMeter = 0;
 292     bi.bmiHeader.biClrUsed = 0;
 293     bi.bmiHeader.biClrImportant = 0;
 294
 295     result = CreateDIBSection(0, &bi, DIB_RGB_COLORS, (void*)&bits, NULL, 0);
 296
 297     bits[0].rgbReserved = alpha = (color>>24)&0xff;
 298     bits[0].rgbRed = ((color>>16)&0xff)*alpha/255;
 299     bits[0].rgbGreen = ((color>>8)&0xff)*alpha/255;
 300     bits[0].rgbBlue = (color&0xff)*alpha/255;
 301
 302     return result;
 303 }
 304
 305 /* Like atan2, but puts angle in correct quadrant if dx is 0. */
 306 REAL gdiplus_atan2(REAL dy, REAL dx)
 307 {
 308     if((dx == 0.0) && (dy != 0.0))
 309         return dy > 0.0 ? M_PI_2 : -M_PI_2;
 310
 311     return atan2(dy, dx);
 312 }
 313
 314 GpStatus hresult_to_status(HRESULT res)
 315 {
 316     switch(res){
 317         case S_OK:
 318             return Ok;
 319         case E_OUTOFMEMORY:
 320             return OutOfMemory;
 321         case E_INVALIDARG:
 322             return InvalidParameter;
 323         default:
 324             return GenericError;
 325     }
 326 }
 327
 328 /* converts a given unit to its value in pixels */
 329 REAL units_to_pixels(REAL units, GpUnit unit, REAL dpi, BOOL printer_display)
 330 {
 331     switch (unit)
 332     {
 333     case UnitPixel:
 334     case UnitWorld:
 335         return units;
 336     case UnitDisplay:
 337         if (printer_display)
 338             return units * dpi * 0.01f;
 339         else
 340             return units;
 341     case UnitPoint:
 342         return units * dpi * inch_per_point;
 343     case UnitInch:
 344         return units * dpi;
 345     case UnitDocument:
 346         return units * dpi * (1.0f / 300.0f); /* Per MSDN */
 347     case UnitMillimeter:
 348         return units * dpi * inch_per_mm;
 349     default:
 350         FIXME("Unhandled unit type: %d\n", unit);
 351         return 0;
 352     }
 353 }
 354
 355 /* converts value in pixels to a given unit */
 356 REAL pixels_to_units(REAL pixels, GpUnit unit, REAL dpi, BOOL printer_display)
 357 {
 358     switch (unit)
 359     {
 360     case UnitPixel:
 361     case UnitWorld:
 362         return pixels;
 363     case UnitDisplay:
 364         if (printer_display)
 365             return pixels * 100.0 / dpi;
 366         else
 367             return pixels;
 368     case UnitPoint:
 369         return pixels * point_per_inch / dpi;
 370     case UnitInch:
 371         return pixels / dpi;
 372     case UnitDocument:
 373         return pixels * 300.0 / dpi;
 374     case UnitMillimeter:
 375         return pixels * mm_per_inch / dpi;
 376     default:
 377         FIXME("Unhandled unit type: %d\n", unit);
 378         return 0;
 379     }
 380 }
 381
 382 REAL units_scale(GpUnit from, GpUnit to, REAL dpi, BOOL printer_display)
 383 {
 384     REAL pixels = units_to_pixels(1.0, from, dpi, printer_display);
 385     return pixels_to_units(pixels, to, dpi, printer_display);
 386 }
 387
 388 /* Calculates Bezier points from cardinal spline points. */
 389 void calc_curve_bezier(const GpPointF *pts, REAL tension, REAL *x1,
 390     REAL *y1, REAL *x2, REAL *y2)
 391 {
 392     REAL xdiff, ydiff;
 393
 394     /* calculate tangent */
 395     xdiff = pts[2].X - pts[0].X;
 396     ydiff = pts[2].Y - pts[0].Y;
 397
 398     /* apply tangent to get control points */
 399     *x1 = pts[1].X - tension * xdiff;
 400     *y1 = pts[1].Y - tension * ydiff;
 401     *x2 = pts[1].X + tension * xdiff;
 402     *y2 = pts[1].Y + tension * ydiff;
 403 }
 404
 405 /* Calculates Bezier points from cardinal spline endpoints. */
 406 void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
 407     REAL tension, REAL *x, REAL *y)
 408 {
 409     /* tangent at endpoints is the line from the endpoint to the adjacent point */
 410     *x = gdip_round(tension * (xadj - xend) + xend);
 411     *y = gdip_round(tension * (yadj - yend) + yend);
 412 }
 413
 414 /* make sure path has enough space for len more points */
 415 BOOL lengthen_path(GpPath *path, INT len)
 416 {
 417     /* initial allocation */
 418     if(path->datalen == 0){
 419         path->datalen = len * 2;
 420
 421         path->pathdata.Points = calloc(path->datalen, sizeof(PointF));
 422         if(!path->pathdata.Points) return FALSE;
 423
 424         path->pathdata.Types = calloc(1, path->datalen);
 425         if(!path->pathdata.Types){
 426             free(path->pathdata.Points);
 427             return FALSE;
 428         }
 429     }
 430     /* reallocation, double size of arrays */
 431     else if(path->datalen - path->pathdata.Count < len){
 432         while(path->datalen - path->pathdata.Count < len)
 433             path->datalen *= 2;
 434
 435         path->pathdata.Points = realloc(path->pathdata.Points, path->datalen * sizeof(PointF));
 436         if(!path->pathdata.Points) return FALSE;
 437
 438         path->pathdata.Types = realloc(path->pathdata.Types, path->datalen);
 439         if(!path->pathdata.Types) return FALSE;
 440     }
 441
 442     return TRUE;
 443 }
 444
 445 void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
 446     BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride)
 447 {
 448     INT x, y;
 449     for (y=0; y<height; y++)
 450     {
 451         const BYTE *src=src_bits+y*src_stride;
 452         BYTE *dst=dst_bits+y*dst_stride;
 453         for (x=0; x<width; x++)
 454         {
 455             BYTE alpha=src[3];
 456             *dst++ = (*src++ * alpha + 127) / 255;
 457             *dst++ = (*src++ * alpha + 127) / 255;
 458             *dst++ = (*src++ * alpha + 127) / 255;
 459             *dst++ = *src++;
 460         }
 461     }
 462 }
 463
 464 /* recursive deletion of GpRegion nodes */
 465 void delete_element(region_element* element)
 466 {
 467     switch(element->type)
 468     {
 469         case RegionDataRect:
 470             break;
 471         case RegionDataPath:
 472             GdipDeletePath(element->elementdata.path);
 473             break;
 474         case RegionDataEmptyRect:
 475         case RegionDataInfiniteRect:
 476             break;
 477         default:
 478             delete_element(element->elementdata.combine.left);
 479             delete_element(element->elementdata.combine.right);
 480             free(element->elementdata.combine.left);
 481             free(element->elementdata.combine.right);
 482             break;
 483     }
 484 }
 485
 486 const char *debugstr_rectf(const RectF* rc)
 487 {
 488     if (!rc) return "(null)";
 489     return wine_dbg_sprintf("(%0.2f,%0.2f,%0.2f,%0.2f)", rc->X, rc->Y, rc->Width, rc->Height);
 490 }
 491
 492 const char *debugstr_pointf(const PointF* pt)
 493 {
 494     if (!pt) return "(null)";
 495     return wine_dbg_sprintf("(%0.2f,%0.2f)", pt->X, pt->Y);
 496 }
 497
 498 const char *debugstr_matrix(const GpMatrix *matrix)
 499 {
 500     if (!matrix) return "(null)";
 501     return wine_dbg_sprintf("%p(%0.2f,%0.2f,%0.2f,%0.2f,%0.2f,%0.2f)",matrix, matrix->matrix[0], matrix->matrix[1],
 502                             matrix->matrix[2], matrix->matrix[3], matrix->matrix[4], matrix->matrix[5]);
 503 }