[GDIPLUS] Sync with Wine Staging 4.0. CORE-15682
[reactos.git] / dll / win32 / gdiplus / gdiplus_private.h
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 #ifndef __WINE_GP_PRIVATE_H_
20 #define __WINE_GP_PRIVATE_H_
21
22 #include <math.h>
23 #include <stdarg.h>
24
25 #include "windef.h"
26 #include "wingdi.h"
27 #include "winbase.h"
28 #include "winuser.h"
29
30 #include "objbase.h"
31 #include "ocidl.h"
32 #include "wincodecsdk.h"
33 #include "wine/heap.h"
34 #include "wine/list.h"
35
36 #include "gdiplus.h"
37
38 #define GP_DEFAULT_PENSTYLE (PS_GEOMETRIC | PS_SOLID | PS_ENDCAP_FLAT | PS_JOIN_MITER)
39 #define MAX_ARC_PTS (13)
40 #define MAX_DASHLEN (16) /* this is a limitation of gdi */
41 #define INCH_HIMETRIC (2540)
42
43 #define VERSION_MAGIC 0xdbc01001
44 #define VERSION_MAGIC2 0xdbc01002
45 #define VALID_MAGIC(x) (((x) & 0xfffff000) == 0xdbc01000)
46 #define TENSION_CONST (0.3)
47
48 #define GIF_DISPOSE_UNSPECIFIED 0
49 #define GIF_DISPOSE_DO_NOT_DISPOSE 1
50 #define GIF_DISPOSE_RESTORE_TO_BKGND 2
51 #define GIF_DISPOSE_RESTORE_TO_PREV 3
52
53
54 COLORREF ARGB2COLORREF(ARGB color) DECLSPEC_HIDDEN;
55 HBITMAP ARGB2BMP(ARGB color) DECLSPEC_HIDDEN;
56 extern INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
57 REAL startAngle, REAL sweepAngle) DECLSPEC_HIDDEN;
58 extern REAL gdiplus_atan2(REAL dy, REAL dx) DECLSPEC_HIDDEN;
59 extern GpStatus hresult_to_status(HRESULT res) DECLSPEC_HIDDEN;
60 extern REAL units_to_pixels(REAL units, GpUnit unit, REAL dpi) DECLSPEC_HIDDEN;
61 extern REAL pixels_to_units(REAL pixels, GpUnit unit, REAL dpi) DECLSPEC_HIDDEN;
62 extern REAL units_scale(GpUnit from, GpUnit to, REAL dpi) DECLSPEC_HIDDEN;
63
64 #define WineCoordinateSpaceGdiDevice ((GpCoordinateSpace)4)
65
66 extern GpStatus gdi_transform_acquire(GpGraphics *graphics);
67 extern GpStatus gdi_transform_release(GpGraphics *graphics);
68 extern GpStatus get_graphics_transform(GpGraphics *graphics, GpCoordinateSpace dst_space,
69 GpCoordinateSpace src_space, GpMatrix *matrix) DECLSPEC_HIDDEN;
70 extern GpStatus gdip_transform_points(GpGraphics *graphics, GpCoordinateSpace dst_space,
71 GpCoordinateSpace src_space, GpPointF *points, INT count) DECLSPEC_HIDDEN;
72
73 extern GpStatus graphics_from_image(GpImage *image, GpGraphics **graphics) DECLSPEC_HIDDEN;
74 extern GpStatus encode_image_png(GpImage *image, IStream* stream, GDIPCONST EncoderParameters* params) DECLSPEC_HIDDEN;
75
76 extern GpStatus METAFILE_GetGraphicsContext(GpMetafile* metafile, GpGraphics **result) DECLSPEC_HIDDEN;
77 extern GpStatus METAFILE_GetDC(GpMetafile* metafile, HDC *hdc) DECLSPEC_HIDDEN;
78 extern GpStatus METAFILE_ReleaseDC(GpMetafile* metafile, HDC hdc) DECLSPEC_HIDDEN;
79 extern GpStatus METAFILE_GraphicsClear(GpMetafile* metafile, ARGB color) DECLSPEC_HIDDEN;
80 extern GpStatus METAFILE_FillRectangles(GpMetafile* metafile, GpBrush* brush,
81 GDIPCONST GpRectF* rects, INT count) DECLSPEC_HIDDEN;
82 extern GpStatus METAFILE_SetClipRect(GpMetafile* metafile,
83 REAL x, REAL y, REAL width, REAL height, CombineMode mode) DECLSPEC_HIDDEN;
84 extern GpStatus METAFILE_SetClipRegion(GpMetafile* metafile, GpRegion* region, CombineMode mode) DECLSPEC_HIDDEN;
85 extern GpStatus METAFILE_SetPageTransform(GpMetafile* metafile, GpUnit unit, REAL scale) DECLSPEC_HIDDEN;
86 extern GpStatus METAFILE_SetWorldTransform(GpMetafile* metafile, GDIPCONST GpMatrix* transform) DECLSPEC_HIDDEN;
87 extern GpStatus METAFILE_ScaleWorldTransform(GpMetafile* metafile, REAL sx, REAL sy, MatrixOrder order) DECLSPEC_HIDDEN;
88 extern GpStatus METAFILE_MultiplyWorldTransform(GpMetafile* metafile, GDIPCONST GpMatrix* matrix, MatrixOrder order) DECLSPEC_HIDDEN;
89 extern GpStatus METAFILE_RotateWorldTransform(GpMetafile* metafile, REAL angle, MatrixOrder order) DECLSPEC_HIDDEN;
90 extern GpStatus METAFILE_TranslateWorldTransform(GpMetafile* metafile, REAL dx, REAL dy, MatrixOrder order) DECLSPEC_HIDDEN;
91 extern GpStatus METAFILE_ResetWorldTransform(GpMetafile* metafile) DECLSPEC_HIDDEN;
92 extern GpStatus METAFILE_BeginContainer(GpMetafile* metafile, GDIPCONST GpRectF *dstrect,
93 GDIPCONST GpRectF *srcrect, GpUnit unit, DWORD StackIndex) DECLSPEC_HIDDEN;
94 extern GpStatus METAFILE_BeginContainerNoParams(GpMetafile* metafile, DWORD StackIndex) DECLSPEC_HIDDEN;
95 extern GpStatus METAFILE_EndContainer(GpMetafile* metafile, DWORD StackIndex) DECLSPEC_HIDDEN;
96 extern GpStatus METAFILE_SaveGraphics(GpMetafile* metafile, DWORD StackIndex) DECLSPEC_HIDDEN;
97 extern GpStatus METAFILE_RestoreGraphics(GpMetafile* metafile, DWORD StackIndex) DECLSPEC_HIDDEN;
98 extern GpStatus METAFILE_GraphicsDeleted(GpMetafile* metafile) DECLSPEC_HIDDEN;
99 extern GpStatus METAFILE_DrawImagePointsRect(GpMetafile* metafile, GpImage *image,
100 GDIPCONST GpPointF *points, INT count, REAL srcx, REAL srcy, REAL srcwidth,
101 REAL srcheight, GpUnit srcUnit, GDIPCONST GpImageAttributes* imageAttributes,
102 DrawImageAbort callback, VOID *callbackData) DECLSPEC_HIDDEN;
103 extern GpStatus METAFILE_AddSimpleProperty(GpMetafile *metafile, SHORT prop, SHORT val) DECLSPEC_HIDDEN;
104 extern GpStatus METAFILE_DrawPath(GpMetafile *metafile, GpPen *pen, GpPath *path) DECLSPEC_HIDDEN;
105 extern GpStatus METAFILE_FillPath(GpMetafile *metafile, GpBrush *brush, GpPath *path) DECLSPEC_HIDDEN;
106 extern void METAFILE_Free(GpMetafile *metafile) DECLSPEC_HIDDEN;
107
108 extern void calc_curve_bezier(const GpPointF *pts, REAL tension, REAL *x1,
109 REAL *y1, REAL *x2, REAL *y2) DECLSPEC_HIDDEN;
110 extern void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
111 REAL tension, REAL *x, REAL *y) DECLSPEC_HIDDEN;
112
113 extern void free_installed_fonts(void) DECLSPEC_HIDDEN;
114
115 extern BOOL lengthen_path(GpPath *path, INT len) DECLSPEC_HIDDEN;
116
117 extern DWORD write_region_data(const GpRegion *region, void *data) DECLSPEC_HIDDEN;
118 extern DWORD write_path_data(GpPath *path, void *data) DECLSPEC_HIDDEN;
119
120 extern GpStatus trace_path(GpGraphics *graphics, GpPath *path) DECLSPEC_HIDDEN;
121
122 typedef struct region_element region_element;
123 extern void delete_element(region_element *element) DECLSPEC_HIDDEN;
124
125 extern GpStatus get_hatch_data(GpHatchStyle hatchstyle, const char **result) DECLSPEC_HIDDEN;
126
127 static inline INT gdip_round(REAL x)
128 {
129 return (INT) floorf(x + 0.5);
130 }
131
132 static inline INT ceilr(REAL x)
133 {
134 return (INT) ceilf(x);
135 }
136
137 static inline REAL deg2rad(REAL degrees)
138 {
139 return M_PI * degrees / 180.0;
140 }
141
142 static inline ARGB color_over(ARGB bg, ARGB fg)
143 {
144 BYTE b, g, r, a;
145 BYTE bg_alpha, fg_alpha;
146
147 fg_alpha = (fg>>24)&0xff;
148
149 if (fg_alpha == 0xff) return fg;
150
151 if (fg_alpha == 0) return bg;
152
153 bg_alpha = (((bg>>24)&0xff) * (0xff-fg_alpha)) / 0xff;
154
155 if (bg_alpha == 0) return fg;
156
157 a = bg_alpha + fg_alpha;
158 b = ((bg&0xff)*bg_alpha + (fg&0xff)*fg_alpha)/a;
159 g = (((bg>>8)&0xff)*bg_alpha + ((fg>>8)&0xff)*fg_alpha)/a;
160 r = (((bg>>16)&0xff)*bg_alpha + ((fg>>16)&0xff)*fg_alpha)/a;
161
162 return (a<<24)|(r<<16)|(g<<8)|b;
163 }
164
165 /* fg is premult, bg and return value are not */
166 static inline ARGB color_over_fgpremult(ARGB bg, ARGB fg)
167 {
168 BYTE b, g, r, a;
169 BYTE bg_alpha, fg_alpha;
170
171 fg_alpha = (fg>>24)&0xff;
172
173 if (fg_alpha == 0) return bg;
174
175 bg_alpha = (((bg>>24)&0xff) * (0xff-fg_alpha)) / 0xff;
176
177 a = bg_alpha + fg_alpha;
178 b = ((bg&0xff)*bg_alpha + (fg&0xff)*0xff)/a;
179 g = (((bg>>8)&0xff)*bg_alpha + ((fg>>8)&0xff)*0xff)/a;
180 r = (((bg>>16)&0xff)*bg_alpha + ((fg>>16)&0xff)*0xff)/a;
181
182 return (a<<24)|(r<<16)|(g<<8)|b;
183 }
184
185 extern const char *debugstr_rectf(const RectF* rc) DECLSPEC_HIDDEN;
186
187 extern const char *debugstr_pointf(const PointF* pt) DECLSPEC_HIDDEN;
188
189 extern void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
190 BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride) DECLSPEC_HIDDEN;
191
192 extern GpStatus convert_pixels(INT width, INT height,
193 INT dst_stride, BYTE *dst_bits, PixelFormat dst_format,
194 INT src_stride, const BYTE *src_bits, PixelFormat src_format, ColorPalette *palette) DECLSPEC_HIDDEN;
195
196 extern PixelFormat apply_image_attributes(const GpImageAttributes *attributes, LPBYTE data,
197 UINT width, UINT height, INT stride, ColorAdjustType type, PixelFormat fmt) DECLSPEC_HIDDEN;
198
199 struct GpMatrix{
200 REAL matrix[6];
201 };
202
203 struct GpPen{
204 UINT style;
205 GpUnit unit;
206 REAL width;
207 GpLineCap endcap;
208 GpLineCap startcap;
209 GpDashCap dashcap;
210 GpCustomLineCap *customstart;
211 GpCustomLineCap *customend;
212 GpLineJoin join;
213 REAL miterlimit;
214 GpDashStyle dash;
215 REAL *dashes;
216 INT numdashes;
217 REAL offset; /* dash offset */
218 GpBrush *brush;
219 GpPenAlignment align;
220 GpMatrix transform;
221 };
222
223 struct GpGraphics{
224 HDC hdc;
225 HWND hwnd;
226 BOOL owndc;
227 BOOL alpha_hdc;
228 GpImage *image;
229 ImageType image_type;
230 SmoothingMode smoothing;
231 CompositingQuality compqual;
232 InterpolationMode interpolation;
233 PixelOffsetMode pixeloffset;
234 CompositingMode compmode;
235 TextRenderingHint texthint;
236 GpUnit unit; /* page unit */
237 REAL scale; /* page scale */
238 REAL xres, yres;
239 GpMatrix worldtrans; /* world transform */
240 BOOL busy; /* hdc handle obtained by GdipGetDC */
241 GpRegion *clip; /* in device coords */
242 UINT textcontrast; /* not used yet. get/set only */
243 struct list containers;
244 GraphicsContainer contid; /* last-issued container ID */
245 INT origin_x, origin_y;
246 INT gdi_transform_acquire_count, gdi_transform_save;
247 GpMatrix gdi_transform;
248 HRGN gdi_clip;
249 /* For giving the caller an HDC when we technically can't: */
250 HBITMAP temp_hbitmap;
251 int temp_hbitmap_width;
252 int temp_hbitmap_height;
253 BYTE *temp_bits;
254 HDC temp_hdc;
255 };
256
257 struct GpBrush{
258 GpBrushType bt;
259 };
260
261 struct GpHatch{
262 GpBrush brush;
263 GpHatchStyle hatchstyle;
264 ARGB forecol;
265 ARGB backcol;
266 };
267
268 struct GpSolidFill{
269 GpBrush brush;
270 ARGB color;
271 };
272
273 struct GpPathGradient{
274 GpBrush brush;
275 GpPath* path;
276 ARGB centercolor;
277 GpWrapMode wrap;
278 BOOL gamma;
279 GpPointF center;
280 GpPointF focus;
281 REAL* blendfac; /* blend factors */
282 REAL* blendpos; /* blend positions */
283 INT blendcount;
284 ARGB *surroundcolors;
285 INT surroundcolorcount;
286 ARGB* pblendcolor; /* preset blend colors */
287 REAL* pblendpos; /* preset blend positions */
288 INT pblendcount;
289 GpMatrix transform;
290 };
291
292 struct GpLineGradient{
293 GpBrush brush;
294 ARGB startcolor;
295 ARGB endcolor;
296 RectF rect;
297 GpWrapMode wrap;
298 BOOL gamma;
299 REAL* blendfac; /* blend factors */
300 REAL* blendpos; /* blend positions */
301 INT blendcount;
302 ARGB* pblendcolor; /* preset blend colors */
303 REAL* pblendpos; /* preset blend positions */
304 INT pblendcount;
305 GpMatrix transform;
306 };
307
308 struct GpTexture{
309 GpBrush brush;
310 GpMatrix transform;
311 GpImage *image;
312 GpImageAttributes *imageattributes;
313 BYTE *bitmap_bits; /* image bits converted to ARGB and run through imageattributes */
314 };
315
316 struct GpPath{
317 GpFillMode fill;
318 GpPathData pathdata;
319 BOOL newfigure; /* whether the next drawing action starts a new figure */
320 INT datalen; /* size of the arrays in pathdata */
321 };
322
323 struct GpPathIterator{
324 GpPathData pathdata;
325 INT subpath_pos; /* for NextSubpath methods */
326 INT marker_pos; /* for NextMarker methods */
327 INT pathtype_pos; /* for NextPathType methods */
328 };
329
330 struct GpCustomLineCap{
331 CustomLineCapType type;
332 GpPathData pathdata;
333 BOOL fill; /* TRUE for fill, FALSE for stroke */
334 GpLineCap cap; /* as far as I can tell, this value is ignored */
335 REAL inset; /* how much to adjust the end of the line */
336 GpLineJoin join;
337 REAL scale;
338 };
339
340 struct GpAdjustableArrowCap{
341 GpCustomLineCap cap;
342 REAL middle_inset;
343 REAL height;
344 REAL width;
345 };
346
347 struct GpImage{
348 IWICBitmapDecoder *decoder;
349 ImageType type;
350 GUID format;
351 UINT flags;
352 UINT frame_count, current_frame;
353 ColorPalette *palette;
354 REAL xres, yres;
355 LONG busy;
356 };
357
358 #define EmfPlusObjectTableSize 64
359
360 typedef enum EmfPlusObjectType
361 {
362 ObjectTypeInvalid,
363 ObjectTypeBrush,
364 ObjectTypePen,
365 ObjectTypePath,
366 ObjectTypeRegion,
367 ObjectTypeImage,
368 ObjectTypeFont,
369 ObjectTypeStringFormat,
370 ObjectTypeImageAttributes,
371 ObjectTypeCustomLineCap,
372 ObjectTypeMax = ObjectTypeCustomLineCap,
373 } EmfPlusObjectType;
374
375 /* Deserialized EmfPlusObject record. */
376 struct emfplus_object {
377 EmfPlusObjectType type;
378 union {
379 GpBrush *brush;
380 GpPen *pen;
381 GpPath *path;
382 GpRegion *region;
383 GpImage *image;
384 GpFont *font;
385 GpImageAttributes *image_attributes;
386 void *object;
387 } u;
388 };
389
390 struct GpMetafile{
391 GpImage image;
392 GpRectF bounds;
393 GpUnit unit;
394 MetafileType metafile_type;
395 HENHMETAFILE hemf;
396 int preserve_hemf; /* if true, hemf belongs to the app and should not be deleted */
397
398 /* recording */
399 HDC record_dc;
400 GpGraphics *record_graphics;
401 BYTE *comment_data;
402 DWORD comment_data_size;
403 DWORD comment_data_length;
404 IStream *record_stream;
405 BOOL auto_frame; /* If true, determine the frame automatically */
406 GpPointF auto_frame_min, auto_frame_max;
407 DWORD next_object_id;
408
409 /* playback */
410 GpGraphics *playback_graphics;
411 HDC playback_dc;
412 GpPointF playback_points[3];
413 GpRectF src_rect;
414 HANDLETABLE *handle_table;
415 int handle_count;
416 XFORM gdiworldtransform;
417 GpMatrix *world_transform;
418 GpUnit page_unit;
419 REAL page_scale;
420 GpRegion *base_clip; /* clip region in device space for all metafile output */
421 GpRegion *clip; /* clip region within the metafile */
422 struct list containers;
423 struct emfplus_object objtable[EmfPlusObjectTableSize];
424 };
425
426 struct GpBitmap{
427 GpImage image;
428 INT width;
429 INT height;
430 PixelFormat format;
431 ImageLockMode lockmode;
432 BYTE *bitmapbits; /* pointer to the buffer we passed in BitmapLockBits */
433 HBITMAP hbitmap;
434 HDC hdc;
435 BYTE *bits; /* actual image bits if this is a DIB */
436 INT stride; /* stride of bits if this is a DIB */
437 BYTE *own_bits; /* image bits that need to be freed with this object */
438 INT lockx, locky; /* X and Y coordinates of the rect when a bitmap is locked for writing. */
439 IWICMetadataReader *metadata_reader; /* NULL if there is no metadata */
440 UINT prop_count;
441 PropertyItem *prop_item; /* cached image properties */
442 };
443
444 struct GpCachedBitmap{
445 GpImage *image;
446 };
447
448 struct color_key{
449 BOOL enabled;
450 ARGB low;
451 ARGB high;
452 };
453
454 struct color_matrix{
455 BOOL enabled;
456 ColorMatrixFlags flags;
457 ColorMatrix colormatrix;
458 ColorMatrix graymatrix;
459 };
460
461 struct color_remap_table{
462 BOOL enabled;
463 INT mapsize;
464 ColorMap *colormap;
465 };
466
467 enum imageattr_noop{
468 IMAGEATTR_NOOP_UNDEFINED,
469 IMAGEATTR_NOOP_SET,
470 IMAGEATTR_NOOP_CLEAR,
471 };
472
473 struct GpImageAttributes{
474 WrapMode wrap;
475 ARGB outside_color;
476 BOOL clamp;
477 struct color_key colorkeys[ColorAdjustTypeCount];
478 struct color_matrix colormatrices[ColorAdjustTypeCount];
479 struct color_remap_table colorremaptables[ColorAdjustTypeCount];
480 BOOL gamma_enabled[ColorAdjustTypeCount];
481 REAL gamma[ColorAdjustTypeCount];
482 enum imageattr_noop noop[ColorAdjustTypeCount];
483 };
484
485 struct GpFont{
486 GpFontFamily *family;
487 OUTLINETEXTMETRICW otm;
488 REAL emSize; /* in font units */
489 Unit unit;
490 };
491
492 extern const struct GpStringFormat default_drawstring_format DECLSPEC_HIDDEN;
493
494 struct GpStringFormat{
495 INT attr;
496 LANGID lang;
497 LANGID digitlang;
498 StringAlignment align;
499 StringTrimming trimming;
500 HotkeyPrefix hkprefix;
501 StringAlignment line_align;
502 StringDigitSubstitute digitsub;
503 INT tabcount;
504 REAL firsttab;
505 REAL *tabs;
506 CharacterRange *character_ranges;
507 INT range_count;
508 BOOL generic_typographic;
509 };
510
511 extern void init_generic_string_formats(void) DECLSPEC_HIDDEN;
512 extern void free_generic_string_formats(void) DECLSPEC_HIDDEN;
513
514 struct GpFontCollection{
515 GpFontFamily **FontFamilies;
516 INT count;
517 INT allocated;
518 };
519
520 struct GpFontFamily{
521 WCHAR FamilyName[LF_FACESIZE];
522 UINT16 em_height, ascent, descent, line_spacing; /* in font units */
523 int dpi;
524 };
525
526 /* internal use */
527 typedef enum RegionType
528 {
529 RegionDataRect = 0x10000000,
530 RegionDataPath = 0x10000001,
531 RegionDataEmptyRect = 0x10000002,
532 RegionDataInfiniteRect = 0x10000003,
533 } RegionType;
534
535 struct region_element
536 {
537 DWORD type; /* Rectangle, Path, SpecialRectangle, or CombineMode */
538 union
539 {
540 GpRectF rect;
541 GpPath *path;
542 struct
543 {
544 struct region_element *left; /* the original region */
545 struct region_element *right; /* what *left was combined with */
546 } combine;
547 } elementdata;
548 };
549
550 struct GpRegion{
551 DWORD num_children;
552 region_element node;
553 };
554
555 struct memory_buffer
556 {
557 const BYTE *buffer;
558 INT size, pos;
559 };
560
561 static inline void init_memory_buffer(struct memory_buffer *mbuf, const BYTE *buffer, INT size)
562 {
563 mbuf->buffer = buffer;
564 mbuf->size = size;
565 mbuf->pos = 0;
566 }
567
568 static inline const void *buffer_read(struct memory_buffer *mbuf, INT size)
569 {
570 if (mbuf->size - mbuf->pos >= size)
571 {
572 const void *data = mbuf->buffer + mbuf->pos;
573 mbuf->pos += size;
574 return data;
575 }
576 return NULL;
577 }
578
579 typedef GpStatus (*gdip_format_string_callback)(HDC hdc,
580 GDIPCONST WCHAR *string, INT index, INT length, GDIPCONST GpFont *font,
581 GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format,
582 INT lineno, const RectF *bounds, INT *underlined_indexes,
583 INT underlined_index_count, void *user_data);
584
585 GpStatus gdip_format_string(HDC hdc,
586 GDIPCONST WCHAR *string, INT length, GDIPCONST GpFont *font,
587 GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format, int ignore_empty_clip,
588 gdip_format_string_callback callback, void *user_data) DECLSPEC_HIDDEN;
589
590 void get_log_fontW(const GpFont *, GpGraphics *, LOGFONTW *) DECLSPEC_HIDDEN;
591
592 static inline BOOL image_lock(GpImage *image, BOOL *unlock)
593 {
594 LONG tid = GetCurrentThreadId(), owner_tid;
595 owner_tid = InterlockedCompareExchange(&image->busy, tid, 0);
596 *unlock = !owner_tid;
597 return !owner_tid || owner_tid==tid;
598 }
599
600 static inline void image_unlock(GpImage *image, BOOL unlock)
601 {
602 if (unlock) image->busy = 0;
603 }
604
605 #endif