2 * Copyright (C) 2007 Google (Evan Stade)
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.
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.
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
25 #include "wine/debug.h"
34 #include "gdiplus_private.h"
36 WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
38 static Status WINAPI NotificationHook(ULONG_PTR *token)
42 return InvalidParameter;
47 static void WINAPI NotificationUnhook(ULONG_PTR token)
49 TRACE("%ld\n", token);
52 /*****************************************************
55 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved)
57 TRACE("(%p, %d, %p)\n", hinst, reason, reserved);
61 case DLL_WINE_PREATTACH:
62 return FALSE; /* prefer native version */
64 case DLL_PROCESS_ATTACH:
65 DisableThreadLibraryCalls( hinst );
71 /*****************************************************
72 * GdiplusStartup [GDIPLUS.@]
74 Status WINAPI GdiplusStartup(ULONG_PTR *token, const struct GdiplusStartupInput *input,
75 struct GdiplusStartupOutput *output)
78 return InvalidParameter;
80 TRACE("%p %p %p\n", token, input, output);
81 TRACE("GdiplusStartupInput %d %p %d %d\n", input->GdiplusVersion,
82 input->DebugEventCallback, input->SuppressBackgroundThread,
83 input->SuppressExternalCodecs);
85 if(input->GdiplusVersion != 1)
86 return UnsupportedGdiplusVersion;
88 if(input->SuppressBackgroundThread){
90 return InvalidParameter;
92 output->NotificationHook = NotificationHook;
93 output->NotificationUnhook = NotificationUnhook;
98 /* FIXME: DebugEventCallback ignored */
103 GpStatus WINAPI GdiplusNotificationHook(ULONG_PTR *token)
105 FIXME("%p\n", token);
106 return NotificationHook(token);
109 void WINAPI GdiplusNotificationUnhook(ULONG_PTR token)
111 FIXME("%ld\n", token);
112 NotificationUnhook(token);
115 /*****************************************************
116 * GdiplusShutdown [GDIPLUS.@]
118 void WINAPI GdiplusShutdown(ULONG_PTR token)
120 /* FIXME: no object tracking */
123 /*****************************************************
124 * GdipAlloc [GDIPLUS.@]
126 void* WINGDIPAPI GdipAlloc(SIZE_T size)
128 return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
131 /*****************************************************
132 * GdipFree [GDIPLUS.@]
134 void WINGDIPAPI GdipFree(void* ptr)
136 HeapFree(GetProcessHeap(), 0, ptr);
139 /* Calculates the bezier points needed to fill in the arc portion starting at
140 * angle start and ending at end. These two angles should be no more than 90
141 * degrees from each other. x1, y1, x2, y2 describes the bounding box (upper
142 * left and width and height). Angles must be in radians. write_first indicates
143 * that the first bezier point should be written out (usually this is false).
144 * pt is the array of GpPointFs that gets written to.
146 static void add_arc_part(GpPointF * pt, REAL x1, REAL y1, REAL x2, REAL y2,
147 REAL start, REAL end, BOOL write_first)
149 REAL center_x, center_y, rad_x, rad_y, cos_start, cos_end,
150 sin_start, sin_end, a, half;
155 center_x = x1 + rad_x;
156 center_y = y1 + rad_y;
158 cos_start = cos(start);
160 sin_start = sin(start);
163 half = (end - start) / 2.0;
164 a = 4.0 / 3.0 * (1 - cos(half)) / sin(half);
170 pt[1].X = cos_start - a * sin_start;
171 pt[1].Y = sin_start + a * cos_start;
175 pt[2].X = cos_end + a * sin_end;
176 pt[2].Y = sin_end - a * cos_end;
178 /* expand the points back from the unit circle to the ellipse */
179 for(i = (write_first ? 0 : 1); i < 4; i ++){
180 pt[i].X = pt[i].X * rad_x + center_x;
181 pt[i].Y = pt[i].Y * rad_y + center_y;
185 /* We plot the curve as if it is on a circle then stretch the points. This
186 * adjusts the angles so that when we stretch the points they will end in the
187 * right place. This is only complicated because atan and atan2 do not behave
189 static void unstretch_angle(REAL * angle, REAL rad_x, REAL rad_y)
194 *angle = deg2rad(*angle);
196 if(fabs(cos(*angle)) < 0.00001 || fabs(sin(*angle)) < 0.00001)
199 stretched = gdiplus_atan2(sin(*angle) / fabs(rad_y), cos(*angle) / fabs(rad_x));
200 revs_off = roundr(*angle / (2.0 * M_PI)) - roundr(stretched / (2.0 * M_PI));
201 stretched += ((REAL)revs_off) * M_PI * 2.0;
205 /* Stores the bezier points that correspond to the arc in points. If points is
206 * null, just return the number of points needed to represent the arc. */
207 INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
208 REAL startAngle, REAL sweepAngle)
211 REAL end_angle, start_angle, endAngle;
213 endAngle = startAngle + sweepAngle;
214 unstretch_angle(&startAngle, x2 / 2.0, y2 / 2.0);
215 unstretch_angle(&endAngle, x2 / 2.0, y2 / 2.0);
217 count = ceilf(fabs(endAngle - startAngle) / M_PI_2) * 3 + 1;
218 /* don't make more than a full circle */
219 count = min(MAX_ARC_PTS, count);
226 /* start_angle and end_angle are the iterative variables */
227 start_angle = startAngle;
229 for(i = 0; i < count - 1; i += 3){
230 /* check if we've overshot the end angle */
231 if( sweepAngle > 0.0 )
232 end_angle = min(start_angle + M_PI_2, endAngle);
234 end_angle = max(start_angle - M_PI_2, endAngle);
236 add_arc_part(&points[i], x1, y1, x2, y2, start_angle, end_angle, i == 0);
238 start_angle += M_PI_2 * (sweepAngle < 0.0 ? -1.0 : 1.0);
244 COLORREF ARGB2COLORREF(ARGB color)
247 Packing of these color structures:
250 FIXME:doesn't handle alpha channel
252 return ((color & 0x0000ff) << 16) +
254 ((color & 0xff0000) >> 16);
257 /* Like atan2, but puts angle in correct quadrant if dx is 0. */
258 REAL gdiplus_atan2(REAL dy, REAL dx)
260 if((dx == 0.0) && (dy != 0.0))
261 return dy > 0.0 ? M_PI_2 : -M_PI_2;
263 return atan2(dy, dx);
266 GpStatus hresult_to_status(HRESULT res)
274 return InvalidParameter;
280 /* converts a given unit to its value in pixels */
281 REAL convert_unit(HDC hdc, GpUnit unit)
286 return (REAL) GetDeviceCaps(hdc, LOGPIXELSX);
288 return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 72.0;
290 return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 300.0;
292 return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 25.4;
294 ERR("cannot convert UnitWorld\n");
303 /* Calculates Bezier points from cardinal spline points. */
304 void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
305 REAL *y1, REAL *x2, REAL *y2)
309 /* calculate tangent */
310 xdiff = pts[2].X - pts[0].X;
311 ydiff = pts[2].Y - pts[0].Y;
313 /* apply tangent to get control points */
314 *x1 = pts[1].X - tension * xdiff;
315 *y1 = pts[1].Y - tension * ydiff;
316 *x2 = pts[1].X + tension * xdiff;
317 *y2 = pts[1].Y + tension * ydiff;
320 /* Calculates Bezier points from cardinal spline endpoints. */
321 void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
322 REAL tension, REAL *x, REAL *y)
324 /* tangent at endpoints is the line from the endpoint to the adjacent point */
325 *x = roundr(tension * (xadj - xend) + xend);
326 *y = roundr(tension * (yadj - yend) + yend);
329 /* make sure path has enough space for len more points */
330 BOOL lengthen_path(GpPath *path, INT len)
332 /* initial allocation */
333 if(path->datalen == 0){
334 path->datalen = len * 2;
336 path->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
337 if(!path->pathdata.Points) return FALSE;
339 path->pathdata.Types = GdipAlloc(path->datalen);
340 if(!path->pathdata.Types){
341 GdipFree(path->pathdata.Points);
345 /* reallocation, double size of arrays */
346 else if(path->datalen - path->pathdata.Count < len){
347 while(path->datalen - path->pathdata.Count < len)
350 path->pathdata.Points = HeapReAlloc(GetProcessHeap(), 0,
351 path->pathdata.Points, path->datalen * sizeof(PointF));
352 if(!path->pathdata.Points) return FALSE;
354 path->pathdata.Types = HeapReAlloc(GetProcessHeap(), 0,
355 path->pathdata.Types, path->datalen);
356 if(!path->pathdata.Types) return FALSE;
362 /* recursive deletion of GpRegion nodes */
363 inline void delete_element(region_element* element)
365 switch(element->type)
370 GdipDeletePath(element->elementdata.pathdata.path);
372 case RegionDataEmptyRect:
373 case RegionDataInfiniteRect:
376 delete_element(element->elementdata.combine.left);
377 delete_element(element->elementdata.combine.right);
378 GdipFree(element->elementdata.combine.left);
379 GdipFree(element->elementdata.combine.right);