Source code of Windows XP (NT5)
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/****************************************************************************
Unit Cache; Interface*****************************************************************************
Module Prefix: Ca
*****************************************************************************/
#define CaEmpty 0
#define CaLine 1
#define CaRectangle 2
#define CaRoundRect 3
#define CaEllipse 4
#define CaArc 5
#define CaPie 6
#define CaPolygon 7
#define CaPolyLine 8
typedef struct{ Word type; Word verb; union { struct { Point start; Point end; Point pnSize; } line;
struct { Rect bbox; Point oval; } rect;
struct { Rect bbox; Point start; Point end; } arc;
struct { Integer numPoints; Point far * pointList; Point pnSize; } poly;
} a;
} CaPrimitive, far * CaPrimitiveLPtr;
/*********************** Exported Function Definitions **********************/
void CaInit( Handle metafile );/* initialize the gdi cache module */
void CaFini( void );/* close down the cache module */
void CaSetMetafileDefaults( void );/* Set up any defaults that will be used throughout the metafile context */
Word CaGetCachedPrimitive( void );/* return the current cached primitive type */
void CaSamePrimitive( Boolean same );/* indicate whether next primitive is the same or new */
void CaMergePen( Word verb );/* indicate that next pen should be merged with previous logical pen */
void CaCachePrimitive( CaPrimitiveLPtr primLPtr );/* Cache the primitive passed down. This includes the current pen and brush. */
void CaFlushCache( void );/* Flush the current primitive stored in the cache */
void CaFlushAttributes( void );/* flush any pending attribute elements */
void CaCreatePenIndirect( LOGPEN far * newLogPen );/* create a new pen */
void CaCreateBrushIndirect( LOGBRUSH far * newLogBrush );/* Create a new logical brush using structure passed in */
void CaCreateFontIndirect( LOGFONT far * newLogFont );/* create the logical font passed as paramter */
void CaSetBkMode( Word mode );/* set the backgound transfer mode */
void CaSetROP2( Word ROP2Code );/* set the transfer ROP mode according to ROP2Code */
void CaSetStretchBltMode( Word mode );/* stretch blt mode - how to preserve scanlines using StretchDIBits() */
void CaSetTextAlign( Word txtAlign );/* set text alignment according to parameter */
void CaSetTextColor( RGBColor txtColor );/* set the text color if different from current setting */
void CaSetTextCharacterExtra( Integer chExtra );/* set the character extra spacing */
void CaSetBkColor( RGBColor bkColor );/* set background color if different from current setting */
Boolean CaIntersectClipRect( Rect rect );/* Create new clipping rectangle - return FALSE if drawing is disabled */
void CaSetClipRect( Rect rect );/* set the current cliprectangle to be equal to rect */
Rect far * CaGetClipRect( void );/* return the current cached clip rectangle */
void CaNonRectangularClip( void );/* notify cache that a non-rectangular clipping region was set */
void CaSaveDC( void );/* save the current device context - used to set up clipping rects */
void CaRestoreDC( void );/* restore the device context and invalidate cached attributes */
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