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