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, BOOL printer_display) DECLSPEC_HIDDEN;
  61 extern REAL pixels_to_units(REAL pixels, GpUnit unit, REAL dpi, BOOL printer_display) DECLSPEC_HIDDEN;
  62 extern REAL units_scale(GpUnit from, GpUnit to, REAL dpi, BOOL printer_display) 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     BOOL printer_display;
 235     GpImage *image;
 236     ImageType image_type;
 237     SmoothingMode smoothing;
 238     CompositingQuality compqual;
 239     InterpolationMode interpolation;
 240     PixelOffsetMode pixeloffset;
 241     CompositingMode compmode;
 242     TextRenderingHint texthint;
 243     GpUnit unit;    /* page unit */
 244     REAL scale;     /* page scale */
 245     REAL xres, yres;
 246     GpMatrix worldtrans; /* world transform */
 247     BOOL busy;      /* hdc handle obtained by GdipGetDC */
 248     GpRegion *clip; /* in device coords */
 249     UINT textcontrast; /* not used yet. get/set only */
 250     struct list containers;
 251     GraphicsContainer contid; /* last-issued container ID */
 252     INT origin_x, origin_y;
 253     INT gdi_transform_acquire_count, gdi_transform_save;
 254     GpMatrix gdi_transform;
 255     HRGN gdi_clip;
 256     /* For giving the caller an HDC when we technically can't: */
 257     HBITMAP temp_hbitmap;
 258     int temp_hbitmap_width;
 259     int temp_hbitmap_height;
 260     BYTE *temp_bits;
 261     HDC temp_hdc;
 262 };
 263
 264 struct GpBrush{
 265     GpBrushType bt;
 266 };
 267
 268 struct GpHatch{
 269     GpBrush brush;
 270     GpHatchStyle hatchstyle;
 271     ARGB forecol;
 272     ARGB backcol;
 273 };
 274
 275 struct GpSolidFill{
 276     GpBrush brush;
 277     ARGB color;
 278 };
 279
 280 struct GpPathGradient{
 281     GpBrush brush;
 282     GpPath* path;
 283     ARGB centercolor;
 284     GpWrapMode wrap;
 285     BOOL gamma;
 286     GpPointF center;
 287     GpPointF focus;
 288     REAL* blendfac;  /* blend factors */
 289     REAL* blendpos;  /* blend positions */
 290     INT blendcount;
 291     ARGB *surroundcolors;
 292     INT surroundcolorcount;
 293     ARGB* pblendcolor; /* preset blend colors */
 294     REAL* pblendpos; /* preset blend positions */
 295     INT pblendcount;
 296     GpMatrix transform;
 297 };
 298
 299 struct GpLineGradient{
 300     GpBrush brush;
 301     ARGB startcolor;
 302     ARGB endcolor;
 303     RectF rect;
 304     GpWrapMode wrap;
 305     BOOL gamma;
 306     REAL* blendfac;  /* blend factors */
 307     REAL* blendpos;  /* blend positions */
 308     INT blendcount;
 309     ARGB* pblendcolor; /* preset blend colors */
 310     REAL* pblendpos; /* preset blend positions */
 311     INT pblendcount;
 312     GpMatrix transform;
 313 };
 314
 315 struct GpTexture{
 316     GpBrush brush;
 317     GpMatrix transform;
 318     GpImage *image;
 319     GpImageAttributes *imageattributes;
 320     BYTE *bitmap_bits; /* image bits converted to ARGB and run through imageattributes */
 321 };
 322
 323 struct GpPath{
 324     GpFillMode fill;
 325     GpPathData pathdata;
 326     BOOL newfigure; /* whether the next drawing action starts a new figure */
 327     INT datalen; /* size of the arrays in pathdata */
 328 };
 329
 330 struct GpPathIterator{
 331     GpPathData pathdata;
 332     INT subpath_pos;    /* for NextSubpath methods */
 333     INT marker_pos;     /* for NextMarker methods */
 334     INT pathtype_pos;   /* for NextPathType methods */
 335 };
 336
 337 struct GpCustomLineCap{
 338     CustomLineCapType type;
 339     GpPathData pathdata;
 340     BOOL fill;      /* TRUE for fill, FALSE for stroke */
 341     GpLineCap cap;  /* as far as I can tell, this value is ignored */
 342     REAL inset;     /* how much to adjust the end of the line */
 343     GpLineJoin join;
 344     REAL scale;
 345 };
 346
 347 struct GpAdjustableArrowCap{
 348     GpCustomLineCap cap;
 349     REAL middle_inset;
 350     REAL height;
 351     REAL width;
 352 };
 353
 354 struct GpImage{
 355     IWICBitmapDecoder *decoder;
 356     IWICBitmapEncoder *encoder;
 357     ImageType type;
 358     GUID format;
 359     UINT flags;
 360     UINT frame_count, current_frame;
 361     ColorPalette *palette;
 362     REAL xres, yres;
 363     LONG busy;
 364 };
 365
 366 #define EmfPlusObjectTableSize 64
 367
 368 typedef enum EmfPlusObjectType
 369 {
 370     ObjectTypeInvalid,
 371     ObjectTypeBrush,
 372     ObjectTypePen,
 373     ObjectTypePath,
 374     ObjectTypeRegion,
 375     ObjectTypeImage,
 376     ObjectTypeFont,
 377     ObjectTypeStringFormat,
 378     ObjectTypeImageAttributes,
 379     ObjectTypeCustomLineCap,
 380     ObjectTypeMax = ObjectTypeCustomLineCap,
 381 } EmfPlusObjectType;
 382
 383 /* Deserialized EmfPlusObject record. */
 384 struct emfplus_object {
 385     EmfPlusObjectType type;
 386     union {
 387         GpBrush *brush;
 388         GpPen *pen;
 389         GpPath *path;
 390         GpRegion *region;
 391         GpImage *image;
 392         GpFont *font;
 393         GpImageAttributes *image_attributes;
 394         void *object;
 395     } u;
 396 };
 397
 398 struct GpMetafile{
 399     GpImage image;
 400     GpRectF bounds;
 401     GpUnit unit;
 402     MetafileType metafile_type;
 403     HENHMETAFILE hemf;
 404     int preserve_hemf; /* if true, hemf belongs to the app and should not be deleted */
 405
 406     /* recording */
 407     HDC record_dc;
 408     GpGraphics *record_graphics;
 409     BYTE *comment_data;
 410     DWORD comment_data_size;
 411     DWORD comment_data_length;
 412     IStream *record_stream;
 413     BOOL auto_frame; /* If true, determine the frame automatically */
 414     GpPointF auto_frame_min, auto_frame_max;
 415     DWORD next_object_id;
 416     UINT limit_dpi;
 417     BOOL printer_display;
 418     REAL logical_dpix;
 419     REAL logical_dpiy;
 420
 421     /* playback */
 422     GpGraphics *playback_graphics;
 423     HDC playback_dc;
 424     GpPointF playback_points[3];
 425     GpRectF src_rect;
 426     HANDLETABLE *handle_table;
 427     int handle_count;
 428     GpMatrix *world_transform;
 429     GpUnit page_unit;
 430     REAL page_scale;
 431     GpRegion *base_clip; /* clip region in device space for all metafile output */
 432     GpRegion *clip; /* clip region within the metafile */
 433     struct list containers;
 434     struct emfplus_object objtable[EmfPlusObjectTableSize];
 435 };
 436
 437 struct GpBitmap{
 438     GpImage image;
 439     INT width;
 440     INT height;
 441     PixelFormat format;
 442     ImageLockMode lockmode;
 443     BYTE *bitmapbits;   /* pointer to the buffer we passed in BitmapLockBits */
 444     HBITMAP hbitmap;
 445     HDC hdc;
 446     BYTE *bits; /* actual image bits if this is a DIB */
 447     INT stride; /* stride of bits if this is a DIB */
 448     BYTE *own_bits; /* image bits that need to be freed with this object */
 449     INT lockx, locky; /* X and Y coordinates of the rect when a bitmap is locked for writing. */
 450     IWICMetadataReader *metadata_reader; /* NULL if there is no metadata */
 451     UINT prop_count;
 452     PropertyItem *prop_item; /* cached image properties */
 453 };
 454
 455 struct GpCachedBitmap{
 456     GpImage *image;
 457 };
 458
 459 struct color_key{
 460     BOOL enabled;
 461     ARGB low;
 462     ARGB high;
 463 };
 464
 465 struct color_matrix{
 466     BOOL enabled;
 467     ColorMatrixFlags flags;
 468     ColorMatrix colormatrix;
 469     ColorMatrix graymatrix;
 470 };
 471
 472 struct color_remap_table{
 473     BOOL enabled;
 474     INT mapsize;
 475     ColorMap *colormap;
 476 };
 477
 478 enum imageattr_noop{
 479     IMAGEATTR_NOOP_UNDEFINED,
 480     IMAGEATTR_NOOP_SET,
 481     IMAGEATTR_NOOP_CLEAR,
 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     enum imageattr_noop noop[ColorAdjustTypeCount];
 494 };
 495
 496 struct GpFont{
 497     GpFontFamily *family;
 498     OUTLINETEXTMETRICW otm;
 499     REAL emSize; /* in font units */
 500     Unit unit;
 501 };
 502
 503 extern const struct GpStringFormat default_drawstring_format DECLSPEC_HIDDEN;
 504
 505 struct GpStringFormat{
 506     INT attr;
 507     LANGID lang;
 508     LANGID digitlang;
 509     StringAlignment align;
 510     StringTrimming trimming;
 511     HotkeyPrefix hkprefix;
 512     StringAlignment line_align;
 513     StringDigitSubstitute digitsub;
 514     INT tabcount;
 515     REAL firsttab;
 516     REAL *tabs;
 517     CharacterRange *character_ranges;
 518     INT range_count;
 519     BOOL generic_typographic;
 520 };
 521
 522 extern void init_generic_string_formats(void) DECLSPEC_HIDDEN;
 523 extern void free_generic_string_formats(void) DECLSPEC_HIDDEN;
 524
 525 struct GpFontCollection{
 526     GpFontFamily **FontFamilies;
 527     INT count;
 528     INT allocated;
 529 };
 530
 531 struct GpFontFamily{
 532     WCHAR FamilyName[LF_FACESIZE];
 533     UINT16 em_height, ascent, descent, line_spacing; /* in font units */
 534     int dpi;
 535 };
 536
 537 /* internal use */
 538 typedef enum RegionType
 539 {
 540     RegionDataRect          = 0x10000000,
 541     RegionDataPath          = 0x10000001,
 542     RegionDataEmptyRect     = 0x10000002,
 543     RegionDataInfiniteRect  = 0x10000003,
 544 } RegionType;
 545
 546 struct region_element
 547 {
 548     DWORD type; /* Rectangle, Path, SpecialRectangle, or CombineMode */
 549     union
 550     {
 551         GpRectF rect;
 552         GpPath *path;
 553         struct
 554         {
 555             struct region_element *left;  /* the original region */
 556             struct region_element *right; /* what *left was combined with */
 557         } combine;
 558     } elementdata;
 559 };
 560
 561 struct GpRegion{
 562     DWORD num_children;
 563     region_element node;
 564 };
 565
 566 struct memory_buffer
 567 {
 568     const BYTE *buffer;
 569     INT size, pos;
 570 };
 571
 572 static inline void init_memory_buffer(struct memory_buffer *mbuf, const BYTE *buffer, INT size)
 573 {
 574     mbuf->buffer = buffer;
 575     mbuf->size = size;
 576     mbuf->pos = 0;
 577 }
 578
 579 static inline const void *buffer_read(struct memory_buffer *mbuf, INT size)
 580 {
 581     if (mbuf->size - mbuf->pos >= size)
 582     {
 583         const void *data = mbuf->buffer + mbuf->pos;
 584         mbuf->pos += size;
 585         return data;
 586     }
 587     return NULL;
 588 }
 589
 590 typedef GpStatus (*gdip_format_string_callback)(HDC hdc,
 591     GDIPCONST WCHAR *string, INT index, INT length, GDIPCONST GpFont *font,
 592     GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format,
 593     INT lineno, const RectF *bounds, INT *underlined_indexes,
 594     INT underlined_index_count, void *user_data);
 595
 596 GpStatus gdip_format_string(HDC hdc,
 597     GDIPCONST WCHAR *string, INT length, GDIPCONST GpFont *font,
 598     GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format, int ignore_empty_clip,
 599     gdip_format_string_callback callback, void *user_data) DECLSPEC_HIDDEN;
 600
 601 void get_log_fontW(const GpFont *, GpGraphics *, LOGFONTW *) DECLSPEC_HIDDEN;
 602
 603 static inline BOOL image_lock(GpImage *image, BOOL *unlock)
 604 {
 605     LONG tid = GetCurrentThreadId(), owner_tid;
 606     owner_tid = InterlockedCompareExchange(&image->busy, tid, 0);
 607     *unlock = !owner_tid;
 608     return !owner_tid || owner_tid==tid;
 609 }
 610
 611 static inline void image_unlock(GpImage *image, BOOL unlock)
 612 {
 613     if (unlock) image->busy = 0;
 614 }
 615
 616 #endif