dlls/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);
  55 HBITMAP ARGB2BMP(ARGB color);
  56 extern INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
  57     REAL startAngle, REAL sweepAngle);
  58 extern REAL gdiplus_atan2(REAL dy, REAL dx);
  59 extern GpStatus hresult_to_status(HRESULT res);
  60 extern REAL units_to_pixels(REAL units, GpUnit unit, REAL dpi, BOOL printer_display);
  61 extern REAL pixels_to_units(REAL pixels, GpUnit unit, REAL dpi, BOOL printer_display);
  62 extern REAL units_scale(GpUnit from, GpUnit to, REAL dpi, BOOL printer_display);
  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);
  70 extern GpStatus gdip_transform_points(GpGraphics *graphics, GpCoordinateSpace dst_space,
  71         GpCoordinateSpace src_space, GpPointF *points, INT count);
  72 void transform_properties(GpGraphics *, GDIPCONST GpMatrix *, BOOL, REAL *, REAL *, REAL *);
  73
  74 extern GpStatus graphics_from_image(GpImage *image, GpGraphics **graphics);
  75 extern GpStatus encode_image_png(GpImage *image, IStream* stream, GDIPCONST EncoderParameters* params);
  76 extern GpStatus terminate_encoder_wic(GpImage *image);
  77
  78 extern GpStatus METAFILE_GetGraphicsContext(GpMetafile* metafile, GpGraphics **result);
  79 extern GpStatus METAFILE_GetDC(GpMetafile* metafile, HDC *hdc);
  80 extern GpStatus METAFILE_ReleaseDC(GpMetafile* metafile, HDC hdc);
  81 extern GpStatus METAFILE_GraphicsClear(GpMetafile* metafile, ARGB color);
  82 extern GpStatus METAFILE_FillRectangles(GpMetafile* metafile, GpBrush* brush,
  83     GDIPCONST GpRectF* rects, INT count);
  84 extern GpStatus METAFILE_SetClipRect(GpMetafile* metafile,
  85     REAL x, REAL y, REAL width, REAL height, CombineMode mode);
  86 extern GpStatus METAFILE_SetClipRegion(GpMetafile* metafile, GpRegion* region, CombineMode mode);
  87 extern GpStatus METAFILE_SetPageTransform(GpMetafile* metafile, GpUnit unit, REAL scale);
  88 extern GpStatus METAFILE_SetWorldTransform(GpMetafile* metafile, GDIPCONST GpMatrix* transform);
  89 extern GpStatus METAFILE_ScaleWorldTransform(GpMetafile* metafile, REAL sx, REAL sy, MatrixOrder order);
  90 extern GpStatus METAFILE_MultiplyWorldTransform(GpMetafile* metafile, GDIPCONST GpMatrix* matrix, MatrixOrder order);
  91 extern GpStatus METAFILE_RotateWorldTransform(GpMetafile* metafile, REAL angle, MatrixOrder order);
  92 extern GpStatus METAFILE_TranslateWorldTransform(GpMetafile* metafile, REAL dx, REAL dy, MatrixOrder order);
  93 extern GpStatus METAFILE_ResetWorldTransform(GpMetafile* metafile);
  94 extern GpStatus METAFILE_BeginContainer(GpMetafile* metafile, GDIPCONST GpRectF *dstrect,
  95     GDIPCONST GpRectF *srcrect, GpUnit unit, DWORD StackIndex);
  96 extern GpStatus METAFILE_BeginContainerNoParams(GpMetafile* metafile, DWORD StackIndex);
  97 extern GpStatus METAFILE_EndContainer(GpMetafile* metafile, DWORD StackIndex);
  98 extern GpStatus METAFILE_SaveGraphics(GpMetafile* metafile, DWORD StackIndex);
  99 extern GpStatus METAFILE_RestoreGraphics(GpMetafile* metafile, DWORD StackIndex);
 100 extern GpStatus METAFILE_GraphicsDeleted(GpMetafile* metafile);
 101 extern GpStatus METAFILE_DrawImagePointsRect(GpMetafile* metafile, GpImage *image,
 102      GDIPCONST GpPointF *points, INT count, REAL srcx, REAL srcy, REAL srcwidth,
 103      REAL srcheight, GpUnit srcUnit, GDIPCONST GpImageAttributes* imageAttributes,
 104      DrawImageAbort callback, VOID *callbackData);
 105 extern GpStatus METAFILE_AddSimpleProperty(GpMetafile *metafile, SHORT prop, SHORT val);
 106 extern GpStatus METAFILE_DrawPath(GpMetafile *metafile, GpPen *pen, GpPath *path);
 107 extern GpStatus METAFILE_FillPath(GpMetafile *metafile, GpBrush *brush, GpPath *path);
 108 extern GpStatus METAFILE_DrawDriverString(GpMetafile *metafile, GDIPCONST UINT16 *text, INT length,
 109     GDIPCONST GpFont *font, GDIPCONST GpStringFormat *format, GDIPCONST GpBrush *brush,
 110     GDIPCONST PointF *positions, INT flags, GDIPCONST GpMatrix *matrix);
 111 extern GpStatus METAFILE_FillRegion(GpMetafile* metafile, GpBrush* brush,
 112     GpRegion* region);
 113 extern void METAFILE_Free(GpMetafile *metafile);
 114 extern GpStatus METAFILE_DrawEllipse(GpMetafile *metafile, GpPen *pen, GpRectF *rect);
 115 extern GpStatus METAFILE_FillEllipse(GpMetafile *metafile, GpBrush *brush, GpRectF *rect);
 116 extern GpStatus METAFILE_DrawRectangles(GpMetafile *metafile, GpPen *pen, const GpRectF *rects, INT count);
 117 extern GpStatus METAFILE_FillPie(GpMetafile *metafile, GpBrush *brush, const GpRectF *rect,
 118     REAL startAngle, REAL sweepAngle);
 119 extern GpStatus METAFILE_DrawArc(GpMetafile *metafile, GpPen *pen, const GpRectF *rect,
 120     REAL startAngle, REAL sweepAngle);
 121 extern GpStatus METAFILE_OffsetClip(GpMetafile *metafile, REAL dx, REAL dy);
 122 extern GpStatus METAFILE_ResetClip(GpMetafile *metafile);
 123 extern GpStatus METAFILE_SetClipPath(GpMetafile *metafile, GpPath *path, CombineMode mode);
 124 extern GpStatus METAFILE_SetRenderingOrigin(GpMetafile *metafile, INT x, INT y);
 125
 126 extern void calc_curve_bezier(const GpPointF *pts, REAL tension, REAL *x1,
 127     REAL *y1, REAL *x2, REAL *y2);
 128 extern void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
 129     REAL tension, REAL *x, REAL *y);
 130
 131 extern void free_installed_fonts(void);
 132
 133 extern BOOL lengthen_path(GpPath *path, INT len);
 134
 135 extern DWORD write_region_data(const GpRegion *region, void *data);
 136 extern DWORD write_path_data(GpPath *path, void *data);
 137
 138 extern GpStatus trace_path(GpGraphics *graphics, GpPath *path);
 139
 140 typedef struct region_element region_element;
 141 extern void delete_element(region_element *element);
 142
 143 extern GpStatus get_hatch_data(GpHatchStyle hatchstyle, const unsigned char **result);
 144
 145 static inline INT gdip_round(REAL x)
 146 {
 147     return (INT) floorf(x + 0.5);
 148 }
 149
 150 static inline INT ceilr(REAL x)
 151 {
 152     return (INT) ceilf(x);
 153 }
 154
 155 static inline REAL deg2rad(REAL degrees)
 156 {
 157     return M_PI * degrees / 180.0;
 158 }
 159
 160 static inline ARGB color_over(ARGB bg, ARGB fg)
 161 {
 162     BYTE b, g, r, a;
 163     BYTE bg_alpha, fg_alpha;
 164
 165     fg_alpha = (fg>>24)&0xff;
 166
 167     if (fg_alpha == 0xff) return fg;
 168
 169     if (fg_alpha == 0) return bg;
 170
 171     bg_alpha = (((bg>>24)&0xff) * (0xff-fg_alpha)) / 0xff;
 172
 173     if (bg_alpha == 0) return fg;
 174
 175     a = bg_alpha + fg_alpha;
 176     b = ((bg&0xff)*bg_alpha + (fg&0xff)*fg_alpha)/a;
 177     g = (((bg>>8)&0xff)*bg_alpha + ((fg>>8)&0xff)*fg_alpha)/a;
 178     r = (((bg>>16)&0xff)*bg_alpha + ((fg>>16)&0xff)*fg_alpha)/a;
 179
 180     return (a<<24)|(r<<16)|(g<<8)|b;
 181 }
 182
 183 /* fg is premult, bg and return value are not */
 184 static inline ARGB color_over_fgpremult(ARGB bg, ARGB fg)
 185 {
 186     BYTE b, g, r, a;
 187     BYTE bg_alpha, fg_alpha;
 188
 189     fg_alpha = (fg>>24)&0xff;
 190
 191     if (fg_alpha == 0) return bg;
 192
 193     bg_alpha = (((bg>>24)&0xff) * (0xff-fg_alpha)) / 0xff;
 194
 195     a = bg_alpha + fg_alpha;
 196     b = ((bg&0xff)*bg_alpha + (fg&0xff)*0xff)/a;
 197     g = (((bg>>8)&0xff)*bg_alpha + ((fg>>8)&0xff)*0xff)/a;
 198     r = (((bg>>16)&0xff)*bg_alpha + ((fg>>16)&0xff)*0xff)/a;
 199
 200     return (a<<24)|(r<<16)|(g<<8)|b;
 201 }
 202
 203 extern const char *debugstr_rectf(const RectF* rc);
 204
 205 extern const char *debugstr_pointf(const PointF* pt);
 206
 207 extern const char *debugstr_matrix(const GpMatrix* matrix);
 208
 209 extern void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
 210     BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride);
 211
 212 extern GpStatus convert_pixels(INT width, INT height,
 213     INT dst_stride, BYTE *dst_bits, PixelFormat dst_format, ColorPalette *dst_palette,
 214     INT src_stride, const BYTE *src_bits, PixelFormat src_format, ColorPalette *src_palette);
 215
 216 extern PixelFormat apply_image_attributes(const GpImageAttributes *attributes, LPBYTE data,
 217     UINT width, UINT height, INT stride, ColorAdjustType type, PixelFormat fmt);
 218
 219 struct GpMatrix{
 220     REAL matrix[6];
 221 };
 222
 223 struct GpPen{
 224     UINT style;
 225     GpUnit unit;
 226     REAL width;
 227     GpLineCap endcap;
 228     GpLineCap startcap;
 229     GpDashCap dashcap;
 230     GpCustomLineCap *customstart;
 231     GpCustomLineCap *customend;
 232     GpLineJoin join;
 233     REAL miterlimit;
 234     GpDashStyle dash;
 235     REAL *dashes;
 236     INT numdashes;
 237     REAL offset;    /* dash offset */
 238     GpBrush *brush;
 239     GpPenAlignment align;
 240     GpMatrix transform;
 241     REAL *compound_array;
 242     INT compound_array_size;
 243 };
 244
 245 struct GpGraphics{
 246     HDC hdc;
 247     HWND hwnd;
 248     BOOL owndc;
 249     BOOL alpha_hdc;
 250     BOOL printer_display;
 251     GpImage *image;
 252     ImageType image_type;
 253     SmoothingMode smoothing;
 254     CompositingQuality compqual;
 255     InterpolationMode interpolation;
 256     PixelOffsetMode pixeloffset;
 257     CompositingMode compmode;
 258     TextRenderingHint texthint;
 259     GpUnit unit;    /* page unit */
 260     REAL scale;     /* page scale */
 261     REAL xres, yres;
 262     GpMatrix worldtrans; /* world transform */
 263     BOOL busy;      /* hdc handle obtained by GdipGetDC */
 264     GpRegion *clip; /* in device coords */
 265     UINT textcontrast; /* not used yet. get/set only */
 266     struct list containers;
 267     GraphicsContainer contid; /* last-issued container ID */
 268     INT origin_x, origin_y;
 269     INT gdi_transform_acquire_count, gdi_transform_save;
 270     GpMatrix gdi_transform;
 271     HRGN gdi_clip;
 272     /* For giving the caller an HDC when we technically can't: */
 273     HBITMAP temp_hbitmap;
 274     int temp_hbitmap_width;
 275     int temp_hbitmap_height;
 276     BYTE *temp_bits;
 277     HDC temp_hdc;
 278 };
 279
 280 struct GpBrush{
 281     GpBrushType bt;
 282 };
 283
 284 struct GpHatch{
 285     GpBrush brush;
 286     GpHatchStyle hatchstyle;
 287     ARGB forecol;
 288     ARGB backcol;
 289 };
 290
 291 struct GpSolidFill{
 292     GpBrush brush;
 293     ARGB color;
 294 };
 295
 296 struct GpPathGradient{
 297     GpBrush brush;
 298     GpPath* path;
 299     ARGB centercolor;
 300     GpWrapMode wrap;
 301     BOOL gamma;
 302     GpPointF center;
 303     GpPointF focus;
 304     REAL* blendfac;  /* blend factors */
 305     REAL* blendpos;  /* blend positions */
 306     INT blendcount;
 307     ARGB *surroundcolors;
 308     INT surroundcolorcount;
 309     ARGB* pblendcolor; /* preset blend colors */
 310     REAL* pblendpos; /* preset blend positions */
 311     INT pblendcount;
 312     GpMatrix transform;
 313 };
 314
 315 struct GpLineGradient{
 316     GpBrush brush;
 317     ARGB startcolor;
 318     ARGB endcolor;
 319     RectF rect;
 320     GpWrapMode wrap;
 321     BOOL gamma;
 322     REAL* blendfac;  /* blend factors */
 323     REAL* blendpos;  /* blend positions */
 324     INT blendcount;
 325     ARGB* pblendcolor; /* preset blend colors */
 326     REAL* pblendpos; /* preset blend positions */
 327     INT pblendcount;
 328     GpMatrix transform;
 329 };
 330
 331 struct GpTexture{
 332     GpBrush brush;
 333     GpMatrix transform;
 334     GpImage *image;
 335     GpImageAttributes *imageattributes;
 336     BYTE *bitmap_bits; /* image bits converted to ARGB and run through imageattributes */
 337 };
 338
 339 struct GpPath{
 340     GpFillMode fill;
 341     GpPathData pathdata;
 342     BOOL newfigure; /* whether the next drawing action starts a new figure */
 343     INT datalen; /* size of the arrays in pathdata */
 344 };
 345
 346 struct GpPathIterator{
 347     GpPathData pathdata;
 348     INT subpath_pos;    /* for NextSubpath methods */
 349     INT marker_pos;     /* for NextMarker methods */
 350     INT pathtype_pos;   /* for NextPathType methods */
 351 };
 352
 353 struct GpCustomLineCap{
 354     CustomLineCapType type;
 355     GpPathData pathdata;
 356     BOOL fill;      /* TRUE for fill, FALSE for stroke */
 357     GpLineCap basecap;  /* cap used together with customLineCap */
 358     REAL inset;      /* distance between line end and cap beginning */
 359     GpLineCap strokeStartCap;
 360     GpLineCap strokeEndCap;
 361     GpLineJoin join; /* joins used for drawing custom cap*/
 362     REAL scale;
 363 };
 364
 365 struct GpAdjustableArrowCap{
 366     GpCustomLineCap cap;
 367     REAL middle_inset;
 368     REAL height;
 369     REAL width;
 370 };
 371
 372 struct GpImage{
 373     IWICBitmapDecoder *decoder;
 374     IWICBitmapEncoder *encoder;
 375     ImageType type;
 376     GUID format;
 377     UINT flags;
 378     UINT frame_count, current_frame;
 379     ColorPalette *palette;
 380     REAL xres, yres;
 381     SRWLOCK lock;
 382 };
 383
 384 #define EmfPlusObjectTableSize 64
 385
 386 typedef enum EmfPlusObjectType
 387 {
 388     ObjectTypeInvalid,
 389     ObjectTypeBrush,
 390     ObjectTypePen,
 391     ObjectTypePath,
 392     ObjectTypeRegion,
 393     ObjectTypeImage,
 394     ObjectTypeFont,
 395     ObjectTypeStringFormat,
 396     ObjectTypeImageAttributes,
 397     ObjectTypeCustomLineCap,
 398     ObjectTypeMax = ObjectTypeCustomLineCap,
 399 } EmfPlusObjectType;
 400
 401 /* Deserialized EmfPlusObject record. */
 402 struct emfplus_object {
 403     EmfPlusObjectType type;
 404     union {
 405         GpBrush *brush;
 406         GpPen *pen;
 407         GpPath *path;
 408         GpRegion *region;
 409         GpImage *image;
 410         GpFont *font;
 411         GpImageAttributes *image_attributes;
 412         void *object;
 413     } u;
 414 };
 415
 416 struct GpMetafile{
 417     GpImage image;
 418     GpRectF bounds;
 419     GpUnit unit;
 420     MetafileType metafile_type;
 421     HENHMETAFILE hemf;
 422     int preserve_hemf; /* if true, hemf belongs to the app and should not be deleted */
 423
 424     /* recording */
 425     HDC record_dc;
 426     GpGraphics *record_graphics;
 427     BYTE *comment_data;
 428     DWORD comment_data_size;
 429     DWORD comment_data_length;
 430     IStream *record_stream;
 431     BOOL auto_frame; /* If true, determine the frame automatically */
 432     GpPointF auto_frame_min, auto_frame_max;
 433     DWORD next_object_id;
 434     UINT limit_dpi;
 435     BOOL printer_display;
 436     REAL logical_dpix;
 437     REAL logical_dpiy;
 438
 439     /* playback */
 440     GpGraphics *playback_graphics;
 441     HDC playback_dc;
 442     GpPointF playback_points[3];
 443     GpRectF src_rect;
 444     HANDLETABLE *handle_table;
 445     int handle_count;
 446     GpMatrix *world_transform;
 447     GpUnit page_unit;
 448     REAL page_scale;
 449     GpRegion *base_clip; /* clip region in device space for all metafile output */
 450     GpRegion *clip; /* clip region within the metafile */
 451     struct list containers;
 452     struct emfplus_object objtable[EmfPlusObjectTableSize];
 453 };
 454
 455 struct GpBitmap{
 456     GpImage image;
 457     INT width;
 458     INT height;
 459     PixelFormat format;
 460     ImageLockMode lockmode;
 461     BYTE *bitmapbits;   /* pointer to the buffer we passed in BitmapLockBits */
 462     HBITMAP hbitmap;
 463     HDC hdc;
 464     BYTE *bits; /* actual image bits if this is a DIB */
 465     INT stride; /* stride of bits if this is a DIB */
 466     BYTE *own_bits; /* image bits that need to be freed with this object */
 467     INT lockx, locky; /* X and Y coordinates of the rect when a bitmap is locked for writing. */
 468     IWICMetadataReader *metadata_reader; /* NULL if there is no metadata */
 469     UINT prop_count;
 470     PropertyItem *prop_item; /* cached image properties */
 471 };
 472
 473 struct GpCachedBitmap{
 474     GpImage *image;
 475 };
 476
 477 struct color_key{
 478     BOOL enabled;
 479     ARGB low;
 480     ARGB high;
 481 };
 482
 483 struct color_matrix{
 484     BOOL enabled;
 485     ColorMatrixFlags flags;
 486     ColorMatrix colormatrix;
 487     ColorMatrix graymatrix;
 488 };
 489
 490 struct color_remap_table{
 491     BOOL enabled;
 492     INT mapsize;
 493     ColorMap *colormap;
 494 };
 495
 496 enum imageattr_noop{
 497     IMAGEATTR_NOOP_UNDEFINED,
 498     IMAGEATTR_NOOP_SET,
 499     IMAGEATTR_NOOP_CLEAR,
 500 };
 501
 502 struct GpImageAttributes{
 503     WrapMode wrap;
 504     ARGB outside_color;
 505     BOOL clamp;
 506     struct color_key colorkeys[ColorAdjustTypeCount];
 507     struct color_matrix colormatrices[ColorAdjustTypeCount];
 508     struct color_remap_table colorremaptables[ColorAdjustTypeCount];
 509     BOOL gamma_enabled[ColorAdjustTypeCount];
 510     REAL gamma[ColorAdjustTypeCount];
 511     enum imageattr_noop noop[ColorAdjustTypeCount];
 512 };
 513
 514 struct GpFont{
 515     GpFontFamily *family;
 516     OUTLINETEXTMETRICW otm;
 517     REAL emSize; /* in font units */
 518     Unit unit;
 519 };
 520
 521 extern const struct GpStringFormat default_drawstring_format;
 522
 523 struct GpStringFormat{
 524     INT attr;
 525     LANGID lang;
 526     LANGID digitlang;
 527     StringAlignment align;
 528     StringTrimming trimming;
 529     HotkeyPrefix hkprefix;
 530     StringAlignment line_align;
 531     StringDigitSubstitute digitsub;
 532     INT tabcount;
 533     REAL firsttab;
 534     REAL *tabs;
 535     CharacterRange *character_ranges;
 536     INT range_count;
 537     BOOL generic_typographic;
 538 };
 539
 540 extern void init_generic_string_formats(void);
 541 extern void free_generic_string_formats(void);
 542
 543 struct GpFontCollection{
 544     GpFontFamily **FontFamilies;
 545     INT count;
 546     INT allocated;
 547 };
 548
 549 struct GpFontFamily{
 550     WCHAR FamilyName[LF_FACESIZE];
 551     UINT16 em_height, ascent, descent, line_spacing; /* in font units */
 552     int dpi;
 553     BOOL installed;
 554     LONG ref;
 555 };
 556
 557 /* internal use */
 558 typedef enum RegionType
 559 {
 560     RegionDataRect          = 0x10000000,
 561     RegionDataPath          = 0x10000001,
 562     RegionDataEmptyRect     = 0x10000002,
 563     RegionDataInfiniteRect  = 0x10000003,
 564 } RegionType;
 565
 566 struct region_element
 567 {
 568     DWORD type; /* Rectangle, Path, SpecialRectangle, or CombineMode */
 569     union
 570     {
 571         GpRectF rect;
 572         GpPath *path;
 573         struct
 574         {
 575             struct region_element *left;  /* the original region */
 576             struct region_element *right; /* what *left was combined with */
 577         } combine;
 578     } elementdata;
 579 };
 580
 581 struct GpRegion{
 582     DWORD num_children;
 583     region_element node;
 584 };
 585
 586 struct memory_buffer
 587 {
 588     const BYTE *buffer;
 589     INT size, pos;
 590 };
 591
 592 static inline void init_memory_buffer(struct memory_buffer *mbuf, const BYTE *buffer, INT size)
 593 {
 594     mbuf->buffer = buffer;
 595     mbuf->size = size;
 596     mbuf->pos = 0;
 597 }
 598
 599 static inline const void *buffer_read(struct memory_buffer *mbuf, INT size)
 600 {
 601     if (mbuf->size - mbuf->pos >= size)
 602     {
 603         const void *data = mbuf->buffer + mbuf->pos;
 604         mbuf->pos += size;
 605         return data;
 606     }
 607     return NULL;
 608 }
 609
 610 typedef GpStatus (*gdip_format_string_callback)(HDC hdc,
 611     GDIPCONST WCHAR *string, INT index, INT length, GDIPCONST GpFont *font,
 612     GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format,
 613     INT lineno, const RectF *bounds, INT *underlined_indexes,
 614     INT underlined_index_count, void *user_data);
 615
 616 GpStatus gdip_format_string(HDC hdc,
 617     GDIPCONST WCHAR *string, INT length, GDIPCONST GpFont *font,
 618     GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format, int ignore_empty_clip,
 619     gdip_format_string_callback callback, void *user_data);
 620
 621 void get_log_fontW(const GpFont *, GpGraphics *, LOGFONTW *);
 622
 623 static inline BOOL image_lock(GpImage *image)
 624 {
 625     return TryAcquireSRWLockExclusive(&image->lock);
 626 }
 627
 628 static inline void image_unlock(GpImage *image)
 629 {
 630     ReleaseSRWLockExclusive(&image->lock);
 631 }
 632
 633 static inline void set_rect(GpRectF *rect, REAL x, REAL y, REAL width, REAL height)
 634 {
 635     rect->X = x;
 636     rect->Y = y;
 637     rect->Width = width;
 638     rect->Height = height;
 639 }
 640
 641 #endif