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/list.h"
  34
  35 #include "gdiplus.h"
  36
  37 #define GP_DEFAULT_PENSTYLE (PS_GEOMETRIC | PS_SOLID | PS_ENDCAP_FLAT | PS_JOIN_MITER)
  38 #define MAX_ARC_PTS (13)
  39 #define MAX_DASHLEN (16) /* this is a limitation of gdi */
  40 #define INCH_HIMETRIC (2540)
  41
  42 #define VERSION_MAGIC  0xdbc01001
  43 #define VERSION_MAGIC2 0xdbc01002
  44 #define VALID_MAGIC(x) (((x) & 0xfffff000) == 0xdbc01000)
  45 #define TENSION_CONST (0.3)
  46
  47 #define GIF_DISPOSE_UNSPECIFIED 0
  48 #define GIF_DISPOSE_DO_NOT_DISPOSE 1
  49 #define GIF_DISPOSE_RESTORE_TO_BKGND 2
  50 #define GIF_DISPOSE_RESTORE_TO_PREV 3
  51
  52 static inline void* __WINE_ALLOC_SIZE(1) heap_alloc(size_t size)
  53 {
  54     return HeapAlloc(GetProcessHeap(), 0, size);
  55 }
  56
  57 static inline void* __WINE_ALLOC_SIZE(1) heap_alloc_zero(size_t size)
  58 {
  59     return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
  60 }
  61
  62 static inline void* __WINE_ALLOC_SIZE(2) heap_realloc(void *mem, size_t size)
  63 {
  64     return HeapReAlloc(GetProcessHeap(), 0, mem, size);
  65 }
  66
  67 static inline BOOL heap_free(void *mem)
  68 {
  69     return HeapFree(GetProcessHeap(), 0, mem);
  70 }
  71
  72 COLORREF ARGB2COLORREF(ARGB color) DECLSPEC_HIDDEN;
  73 HBITMAP ARGB2BMP(ARGB color) DECLSPEC_HIDDEN;
  74 extern INT arc2polybezier(GpPointF * points, REAL x1, REAL y1, REAL x2, REAL y2,
  75     REAL startAngle, REAL sweepAngle) DECLSPEC_HIDDEN;
  76 extern REAL gdiplus_atan2(REAL dy, REAL dx) DECLSPEC_HIDDEN;
  77 extern GpStatus hresult_to_status(HRESULT res) DECLSPEC_HIDDEN;
  78 extern REAL units_to_pixels(REAL units, GpUnit unit, REAL dpi) DECLSPEC_HIDDEN;
  79 extern REAL pixels_to_units(REAL pixels, GpUnit unit, REAL dpi) DECLSPEC_HIDDEN;
  80 extern REAL units_scale(GpUnit from, GpUnit to, REAL dpi) DECLSPEC_HIDDEN;
  81
  82 #define WineCoordinateSpaceGdiDevice ((GpCoordinateSpace)4)
  83
  84 extern GpStatus gdi_transform_acquire(GpGraphics *graphics);
  85 extern GpStatus gdi_transform_release(GpGraphics *graphics);
  86 extern GpStatus get_graphics_transform(GpGraphics *graphics, GpCoordinateSpace dst_space,
  87         GpCoordinateSpace src_space, GpMatrix *matrix) DECLSPEC_HIDDEN;
  88 extern GpStatus gdip_transform_points(GpGraphics *graphics, GpCoordinateSpace dst_space,
  89         GpCoordinateSpace src_space, GpPointF *points, INT count) DECLSPEC_HIDDEN;
  90
  91 extern GpStatus graphics_from_image(GpImage *image, GpGraphics **graphics) DECLSPEC_HIDDEN;
  92 extern GpStatus encode_image_png(GpImage *image, IStream* stream, GDIPCONST EncoderParameters* params) DECLSPEC_HIDDEN;
  93
  94 extern GpStatus METAFILE_GetGraphicsContext(GpMetafile* metafile, GpGraphics **result) DECLSPEC_HIDDEN;
  95 extern GpStatus METAFILE_GetDC(GpMetafile* metafile, HDC *hdc) DECLSPEC_HIDDEN;
  96 extern GpStatus METAFILE_ReleaseDC(GpMetafile* metafile, HDC hdc) DECLSPEC_HIDDEN;
  97 extern GpStatus METAFILE_GraphicsClear(GpMetafile* metafile, ARGB color) DECLSPEC_HIDDEN;
  98 extern GpStatus METAFILE_FillRectangles(GpMetafile* metafile, GpBrush* brush,
  99     GDIPCONST GpRectF* rects, INT count) DECLSPEC_HIDDEN;
 100 extern GpStatus METAFILE_SetClipRect(GpMetafile* metafile,
 101     REAL x, REAL y, REAL width, REAL height, CombineMode mode) DECLSPEC_HIDDEN;
 102 extern GpStatus METAFILE_SetClipRegion(GpMetafile* metafile, GpRegion* region, CombineMode mode) DECLSPEC_HIDDEN;
 103 extern GpStatus METAFILE_SetPageTransform(GpMetafile* metafile, GpUnit unit, REAL scale) DECLSPEC_HIDDEN;
 104 extern GpStatus METAFILE_SetWorldTransform(GpMetafile* metafile, GDIPCONST GpMatrix* transform) DECLSPEC_HIDDEN;
 105 extern GpStatus METAFILE_ScaleWorldTransform(GpMetafile* metafile, REAL sx, REAL sy, MatrixOrder order) DECLSPEC_HIDDEN;
 106 extern GpStatus METAFILE_MultiplyWorldTransform(GpMetafile* metafile, GDIPCONST GpMatrix* matrix, MatrixOrder order) DECLSPEC_HIDDEN;
 107 extern GpStatus METAFILE_RotateWorldTransform(GpMetafile* metafile, REAL angle, MatrixOrder order) DECLSPEC_HIDDEN;
 108 extern GpStatus METAFILE_TranslateWorldTransform(GpMetafile* metafile, REAL dx, REAL dy, MatrixOrder order) DECLSPEC_HIDDEN;
 109 extern GpStatus METAFILE_ResetWorldTransform(GpMetafile* metafile) DECLSPEC_HIDDEN;
 110 extern GpStatus METAFILE_BeginContainer(GpMetafile* metafile, GDIPCONST GpRectF *dstrect,
 111     GDIPCONST GpRectF *srcrect, GpUnit unit, DWORD StackIndex) DECLSPEC_HIDDEN;
 112 extern GpStatus METAFILE_BeginContainerNoParams(GpMetafile* metafile, DWORD StackIndex) DECLSPEC_HIDDEN;
 113 extern GpStatus METAFILE_EndContainer(GpMetafile* metafile, DWORD StackIndex) DECLSPEC_HIDDEN;
 114 extern GpStatus METAFILE_SaveGraphics(GpMetafile* metafile, DWORD StackIndex) DECLSPEC_HIDDEN;
 115 extern GpStatus METAFILE_RestoreGraphics(GpMetafile* metafile, DWORD StackIndex) DECLSPEC_HIDDEN;
 116 extern GpStatus METAFILE_GraphicsDeleted(GpMetafile* metafile) DECLSPEC_HIDDEN;
 117 extern GpStatus METAFILE_DrawImagePointsRect(GpMetafile* metafile, GpImage *image,
 118      GDIPCONST GpPointF *points, INT count, REAL srcx, REAL srcy, REAL srcwidth,
 119      REAL srcheight, GpUnit srcUnit, GDIPCONST GpImageAttributes* imageAttributes,
 120      DrawImageAbort callback, VOID *callbackData) DECLSPEC_HIDDEN;
 121 extern GpStatus METAFILE_AddSimpleProperty(GpMetafile *metafile, SHORT prop, SHORT val) DECLSPEC_HIDDEN;
 122 extern GpStatus METAFILE_DrawPath(GpMetafile *metafile, GpPen *pen, GpPath *path) DECLSPEC_HIDDEN;
 123 extern GpStatus METAFILE_FillPath(GpMetafile *metafile, GpBrush *brush, GpPath *path) DECLSPEC_HIDDEN;
 124 extern void METAFILE_Free(GpMetafile *metafile) DECLSPEC_HIDDEN;
 125
 126 extern void calc_curve_bezier(const GpPointF *pts, REAL tension, REAL *x1,
 127     REAL *y1, REAL *x2, REAL *y2) DECLSPEC_HIDDEN;
 128 extern void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
 129     REAL tension, REAL *x, REAL *y) DECLSPEC_HIDDEN;
 130
 131 extern void free_installed_fonts(void) DECLSPEC_HIDDEN;
 132
 133 extern BOOL lengthen_path(GpPath *path, INT len) DECLSPEC_HIDDEN;
 134
 135 extern DWORD write_region_data(const GpRegion *region, void *data) DECLSPEC_HIDDEN;
 136 extern DWORD write_path_data(GpPath *path, void *data) DECLSPEC_HIDDEN;
 137
 138 extern GpStatus trace_path(GpGraphics *graphics, GpPath *path) DECLSPEC_HIDDEN;
 139
 140 typedef struct region_element region_element;
 141 extern void delete_element(region_element *element) DECLSPEC_HIDDEN;
 142
 143 extern GpStatus get_hatch_data(GpHatchStyle hatchstyle, const char **result) DECLSPEC_HIDDEN;
 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) DECLSPEC_HIDDEN;
 204
 205 extern const char *debugstr_pointf(const PointF* pt) DECLSPEC_HIDDEN;
 206
 207 extern void convert_32bppARGB_to_32bppPARGB(UINT width, UINT height,
 208     BYTE *dst_bits, INT dst_stride, const BYTE *src_bits, INT src_stride) DECLSPEC_HIDDEN;
 209
 210 extern GpStatus convert_pixels(INT width, INT height,
 211     INT dst_stride, BYTE *dst_bits, PixelFormat dst_format,
 212     INT src_stride, const BYTE *src_bits, PixelFormat src_format, ColorPalette *palette) DECLSPEC_HIDDEN;
 213
 214 extern PixelFormat apply_image_attributes(const GpImageAttributes *attributes, LPBYTE data,
 215     UINT width, UINT height, INT stride, ColorAdjustType type, PixelFormat fmt) DECLSPEC_HIDDEN;
 216
 217 struct GpMatrix{
 218     REAL matrix[6];
 219 };
 220
 221 struct GpPen{
 222     UINT style;
 223     GpUnit unit;
 224     REAL width;
 225     GpLineCap endcap;
 226     GpLineCap startcap;
 227     GpDashCap dashcap;
 228     GpCustomLineCap *customstart;
 229     GpCustomLineCap *customend;
 230     GpLineJoin join;
 231     REAL miterlimit;
 232     GpDashStyle dash;
 233     REAL *dashes;
 234     INT numdashes;
 235     REAL offset;    /* dash offset */
 236     GpBrush *brush;
 237     GpPenAlignment align;
 238     GpMatrix transform;
 239 };
 240
 241 struct GpGraphics{
 242     HDC hdc;
 243     HWND hwnd;
 244     BOOL owndc;
 245     BOOL alpha_hdc;
 246     GpImage *image;
 247     ImageType image_type;
 248     SmoothingMode smoothing;
 249     CompositingQuality compqual;
 250     InterpolationMode interpolation;
 251     PixelOffsetMode pixeloffset;
 252     CompositingMode compmode;
 253     TextRenderingHint texthint;
 254     GpUnit unit;    /* page unit */
 255     REAL scale;     /* page scale */
 256     REAL xres, yres;
 257     GpMatrix worldtrans; /* world transform */
 258     BOOL busy;      /* hdc handle obtained by GdipGetDC */
 259     GpRegion *clip; /* in device coords */
 260     UINT textcontrast; /* not used yet. get/set only */
 261     struct list containers;
 262     GraphicsContainer contid; /* last-issued container ID */
 263     INT origin_x, origin_y;
 264     INT gdi_transform_acquire_count, gdi_transform_save;
 265     GpMatrix gdi_transform;
 266     HRGN gdi_clip;
 267     /* For giving the caller an HDC when we technically can't: */
 268     HBITMAP temp_hbitmap;
 269     int temp_hbitmap_width;
 270     int temp_hbitmap_height;
 271     BYTE *temp_bits;
 272     HDC temp_hdc;
 273 };
 274
 275 struct GpBrush{
 276     GpBrushType bt;
 277 };
 278
 279 struct GpHatch{
 280     GpBrush brush;
 281     GpHatchStyle hatchstyle;
 282     ARGB forecol;
 283     ARGB backcol;
 284 };
 285
 286 struct GpSolidFill{
 287     GpBrush brush;
 288     ARGB color;
 289 };
 290
 291 struct GpPathGradient{
 292     GpBrush brush;
 293     GpPath* path;
 294     ARGB centercolor;
 295     GpWrapMode wrap;
 296     BOOL gamma;
 297     GpPointF center;
 298     GpPointF focus;
 299     REAL* blendfac;  /* blend factors */
 300     REAL* blendpos;  /* blend positions */
 301     INT blendcount;
 302     ARGB *surroundcolors;
 303     INT surroundcolorcount;
 304     ARGB* pblendcolor; /* preset blend colors */
 305     REAL* pblendpos; /* preset blend positions */
 306     INT pblendcount;
 307     GpMatrix transform;
 308 };
 309
 310 struct GpLineGradient{
 311     GpBrush brush;
 312     GpPointF startpoint;
 313     GpPointF endpoint;
 314     ARGB startcolor;
 315     ARGB endcolor;
 316     RectF rect;
 317     GpWrapMode wrap;
 318     BOOL gamma;
 319     REAL* blendfac;  /* blend factors */
 320     REAL* blendpos;  /* blend positions */
 321     INT blendcount;
 322     ARGB* pblendcolor; /* preset blend colors */
 323     REAL* pblendpos; /* preset blend positions */
 324     INT pblendcount;
 325     GpMatrix transform;
 326 };
 327
 328 struct GpTexture{
 329     GpBrush brush;
 330     GpMatrix transform;
 331     GpImage *image;
 332     GpImageAttributes *imageattributes;
 333     BYTE *bitmap_bits; /* image bits converted to ARGB and run through imageattributes */
 334 };
 335
 336 struct GpPath{
 337     GpFillMode fill;
 338     GpPathData pathdata;
 339     BOOL newfigure; /* whether the next drawing action starts a new figure */
 340     INT datalen; /* size of the arrays in pathdata */
 341 };
 342
 343 struct GpPathIterator{
 344     GpPathData pathdata;
 345     INT subpath_pos;    /* for NextSubpath methods */
 346     INT marker_pos;     /* for NextMarker methods */
 347     INT pathtype_pos;   /* for NextPathType methods */
 348 };
 349
 350 struct GpCustomLineCap{
 351     CustomLineCapType type;
 352     GpPathData pathdata;
 353     BOOL fill;      /* TRUE for fill, FALSE for stroke */
 354     GpLineCap cap;  /* as far as I can tell, this value is ignored */
 355     REAL inset;     /* how much to adjust the end of the line */
 356     GpLineJoin join;
 357     REAL scale;
 358 };
 359
 360 struct GpAdjustableArrowCap{
 361     GpCustomLineCap cap;
 362 };
 363
 364 struct GpImage{
 365     IWICBitmapDecoder *decoder;
 366     ImageType type;
 367     GUID format;
 368     UINT flags;
 369     UINT frame_count, current_frame;
 370     ColorPalette *palette;
 371     REAL xres, yres;
 372     LONG busy;
 373 };
 374
 375 #define EmfPlusObjectTableSize 64
 376
 377 typedef enum EmfPlusObjectType
 378 {
 379     ObjectTypeInvalid,
 380     ObjectTypeBrush,
 381     ObjectTypePen,
 382     ObjectTypePath,
 383     ObjectTypeRegion,
 384     ObjectTypeImage,
 385     ObjectTypeFont,
 386     ObjectTypeStringFormat,
 387     ObjectTypeImageAttributes,
 388     ObjectTypeCustomLineCap,
 389     ObjectTypeMax = ObjectTypeCustomLineCap,
 390 } EmfPlusObjectType;
 391
 392 /* Deserialized EmfPlusObject record. */
 393 struct emfplus_object {
 394     EmfPlusObjectType type;
 395     union {
 396         GpBrush *brush;
 397         GpPen *pen;
 398         GpPath *path;
 399         GpRegion *region;
 400         GpImage *image;
 401         GpFont *font;
 402         GpImageAttributes *image_attributes;
 403         void *object;
 404     } u;
 405 };
 406
 407 struct GpMetafile{
 408     GpImage image;
 409     GpRectF bounds;
 410     GpUnit unit;
 411     MetafileType metafile_type;
 412     HENHMETAFILE hemf;
 413     int preserve_hemf; /* if true, hemf belongs to the app and should not be deleted */
 414
 415     /* recording */
 416     HDC record_dc;
 417     GpGraphics *record_graphics;
 418     BYTE *comment_data;
 419     DWORD comment_data_size;
 420     DWORD comment_data_length;
 421     IStream *record_stream;
 422     BOOL auto_frame; /* If true, determine the frame automatically */
 423     GpPointF auto_frame_min, auto_frame_max;
 424     DWORD next_object_id;
 425
 426     /* playback */
 427     GpGraphics *playback_graphics;
 428     HDC playback_dc;
 429     GpPointF playback_points[3];
 430     GpRectF src_rect;
 431     HANDLETABLE *handle_table;
 432     int handle_count;
 433     XFORM gdiworldtransform;
 434     GpMatrix *world_transform;
 435     GpUnit page_unit;
 436     REAL page_scale;
 437     GpRegion *base_clip; /* clip region in device space for all metafile output */
 438     GpRegion *clip; /* clip region within the metafile */
 439     struct list containers;
 440     struct emfplus_object objtable[EmfPlusObjectTableSize];
 441 };
 442
 443 struct GpBitmap{
 444     GpImage image;
 445     INT width;
 446     INT height;
 447     PixelFormat format;
 448     ImageLockMode lockmode;
 449     BYTE *bitmapbits;   /* pointer to the buffer we passed in BitmapLockBits */
 450     HBITMAP hbitmap;
 451     HDC hdc;
 452     BYTE *bits; /* actual image bits if this is a DIB */
 453     INT stride; /* stride of bits if this is a DIB */
 454     BYTE *own_bits; /* image bits that need to be freed with this object */
 455     INT lockx, locky; /* X and Y coordinates of the rect when a bitmap is locked for writing. */
 456     IWICMetadataReader *metadata_reader; /* NULL if there is no metadata */
 457     UINT prop_count;
 458     PropertyItem *prop_item; /* cached image properties */
 459 };
 460
 461 struct GpCachedBitmap{
 462     GpImage *image;
 463 };
 464
 465 struct color_key{
 466     BOOL enabled;
 467     ARGB low;
 468     ARGB high;
 469 };
 470
 471 struct color_matrix{
 472     BOOL enabled;
 473     ColorMatrixFlags flags;
 474     ColorMatrix colormatrix;
 475     ColorMatrix graymatrix;
 476 };
 477
 478 struct color_remap_table{
 479     BOOL enabled;
 480     INT mapsize;
 481     ColorMap *colormap;
 482 };
 483
 484 struct GpImageAttributes{
 485     WrapMode wrap;
 486     ARGB outside_color;
 487     BOOL clamp;
 488     struct color_key colorkeys[ColorAdjustTypeCount];
 489     struct color_matrix colormatrices[ColorAdjustTypeCount];
 490     struct color_remap_table colorremaptables[ColorAdjustTypeCount];
 491     BOOL gamma_enabled[ColorAdjustTypeCount];
 492     REAL gamma[ColorAdjustTypeCount];
 493 };
 494
 495 struct GpFont{
 496     GpFontFamily *family;
 497     OUTLINETEXTMETRICW otm;
 498     REAL emSize; /* in font units */
 499     Unit unit;
 500 };
 501
 502 extern const struct GpStringFormat default_drawstring_format DECLSPEC_HIDDEN;
 503
 504 struct GpStringFormat{
 505     INT attr;
 506     LANGID lang;
 507     LANGID digitlang;
 508     StringAlignment align;
 509     StringTrimming trimming;
 510     HotkeyPrefix hkprefix;
 511     StringAlignment line_align;
 512     StringDigitSubstitute digitsub;
 513     INT tabcount;
 514     REAL firsttab;
 515     REAL *tabs;
 516     CharacterRange *character_ranges;
 517     INT range_count;
 518     BOOL generic_typographic;
 519 };
 520
 521 extern void init_generic_string_formats(void) DECLSPEC_HIDDEN;
 522 extern void free_generic_string_formats(void) DECLSPEC_HIDDEN;
 523
 524 struct GpFontCollection{
 525     GpFontFamily **FontFamilies;
 526     INT count;
 527     INT allocated;
 528 };
 529
 530 struct GpFontFamily{
 531     WCHAR FamilyName[LF_FACESIZE];
 532     UINT16 em_height, ascent, descent, line_spacing; /* in font units */
 533     int dpi;
 534 };
 535
 536 /* internal use */
 537 typedef enum RegionType
 538 {
 539     RegionDataRect          = 0x10000000,
 540     RegionDataPath          = 0x10000001,
 541     RegionDataEmptyRect     = 0x10000002,
 542     RegionDataInfiniteRect  = 0x10000003,
 543 } RegionType;
 544
 545 struct region_element
 546 {
 547     DWORD type; /* Rectangle, Path, SpecialRectangle, or CombineMode */
 548     union
 549     {
 550         GpRectF rect;
 551         GpPath *path;
 552         struct
 553         {
 554             struct region_element *left;  /* the original region */
 555             struct region_element *right; /* what *left was combined with */
 556         } combine;
 557     } elementdata;
 558 };
 559
 560 struct GpRegion{
 561     DWORD num_children;
 562     region_element node;
 563 };
 564
 565 struct memory_buffer
 566 {
 567     const BYTE *buffer;
 568     INT size, pos;
 569 };
 570
 571 static inline void init_memory_buffer(struct memory_buffer *mbuf, const BYTE *buffer, INT size)
 572 {
 573     mbuf->buffer = buffer;
 574     mbuf->size = size;
 575     mbuf->pos = 0;
 576 }
 577
 578 static inline const void *buffer_read(struct memory_buffer *mbuf, INT size)
 579 {
 580     if (mbuf->size - mbuf->pos >= size)
 581     {
 582         const void *data = mbuf->buffer + mbuf->pos;
 583         mbuf->pos += size;
 584         return data;
 585     }
 586     return NULL;
 587 }
 588
 589 typedef GpStatus (*gdip_format_string_callback)(HDC hdc,
 590     GDIPCONST WCHAR *string, INT index, INT length, GDIPCONST GpFont *font,
 591     GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format,
 592     INT lineno, const RectF *bounds, INT *underlined_indexes,
 593     INT underlined_index_count, void *user_data);
 594
 595 GpStatus gdip_format_string(HDC hdc,
 596     GDIPCONST WCHAR *string, INT length, GDIPCONST GpFont *font,
 597     GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format, int ignore_empty_clip,
 598     gdip_format_string_callback callback, void *user_data) DECLSPEC_HIDDEN;
 599
 600 void get_log_fontW(const GpFont *, GpGraphics *, LOGFONTW *) DECLSPEC_HIDDEN;
 601
 602 static inline BOOL image_lock(GpImage *image, BOOL *unlock)
 603 {
 604     LONG tid = GetCurrentThreadId(), owner_tid;
 605     owner_tid = InterlockedCompareExchange(&image->busy, tid, 0);
 606     *unlock = !owner_tid;
 607     return !owner_tid || owner_tid==tid;
 608 }
 609
 610 static inline void image_unlock(GpImage *image, BOOL unlock)
 611 {
 612     if (unlock) image->busy = 0;
 613 }
 614
 615 #endif