1450 lines
46 KiB
C
1450 lines
46 KiB
C
/*
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* X11 graphics driver graphics functions
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*
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* Copyright 1993,1994 Alexandre Julliard
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*/
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/*
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* FIXME: none of these functions obey the GM_ADVANCED
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* graphics mode
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*/
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#include "config.h"
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#ifndef X_DISPLAY_MISSING
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#include <X11/Intrinsic.h>
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#include "ts_xlib.h"
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#include "ts_xutil.h"
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#include <math.h>
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#ifdef HAVE_FLOAT_H
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# include <float.h>
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#endif
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#include <stdlib.h>
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#ifndef PI
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#define PI M_PI
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#endif
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#include <string.h>
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#include "x11drv.h"
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#include "x11font.h"
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#include "bitmap.h"
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#include "gdi.h"
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#include "dc.h"
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#include "monitor.h"
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#include "bitmap.h"
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#include "callback.h"
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#include "metafile.h"
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#include "palette.h"
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#include "color.h"
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#include "region.h"
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#include "struct32.h"
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#include "debug.h"
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#include "xmalloc.h"
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DEFAULT_DEBUG_CHANNEL(graphics)
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#define ABS(x) ((x)<0?(-(x)):(x))
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/* ROP code to GC function conversion */
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const int X11DRV_XROPfunction[16] =
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{
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GXclear, /* R2_BLACK */
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GXnor, /* R2_NOTMERGEPEN */
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GXandInverted, /* R2_MASKNOTPEN */
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GXcopyInverted, /* R2_NOTCOPYPEN */
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GXandReverse, /* R2_MASKPENNOT */
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GXinvert, /* R2_NOT */
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GXxor, /* R2_XORPEN */
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GXnand, /* R2_NOTMASKPEN */
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GXand, /* R2_MASKPEN */
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GXequiv, /* R2_NOTXORPEN */
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GXnoop, /* R2_NOP */
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GXorInverted, /* R2_MERGENOTPEN */
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GXcopy, /* R2_COPYPEN */
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GXorReverse, /* R2_MERGEPENNOT */
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GXor, /* R2_MERGEPEN */
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GXset /* R2_WHITE */
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};
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/***********************************************************************
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* X11DRV_SetupGCForPatBlt
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*
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* Setup the GC for a PatBlt operation using current brush.
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* If fMapColors is TRUE, X pixels are mapped to Windows colors.
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* Return FALSE if brush is BS_NULL, TRUE otherwise.
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*/
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BOOL X11DRV_SetupGCForPatBlt( DC * dc, GC gc, BOOL fMapColors )
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{
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XGCValues val;
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unsigned long mask;
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Pixmap pixmap = 0;
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X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
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if (physDev->brush.style == BS_NULL) return FALSE;
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if (physDev->brush.pixel == -1)
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{
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/* Special case used for monochrome pattern brushes.
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* We need to swap foreground and background because
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* Windows does it the wrong way...
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*/
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val.foreground = physDev->backgroundPixel;
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val.background = physDev->textPixel;
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}
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else
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{
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val.foreground = physDev->brush.pixel;
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val.background = physDev->backgroundPixel;
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}
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if (fMapColors && X11DRV_PALETTE_XPixelToPalette)
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{
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val.foreground = X11DRV_PALETTE_XPixelToPalette[val.foreground];
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val.background = X11DRV_PALETTE_XPixelToPalette[val.background];
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}
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if (dc->w.flags & DC_DIRTY) CLIPPING_UpdateGCRegion(dc);
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val.function = X11DRV_XROPfunction[dc->w.ROPmode-1];
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/*
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** Let's replace GXinvert by GXxor with (black xor white)
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** This solves the selection color and leak problems in excel
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** FIXME : Let's do that only if we work with X-pixels, not with Win-pixels
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*/
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if (val.function == GXinvert)
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{
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val.foreground = BlackPixelOfScreen(X11DRV_GetXScreen()) ^ WhitePixelOfScreen(X11DRV_GetXScreen());
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val.function = GXxor;
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}
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val.fill_style = physDev->brush.fillStyle;
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switch(val.fill_style)
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{
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case FillStippled:
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case FillOpaqueStippled:
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if (dc->w.backgroundMode==OPAQUE) val.fill_style = FillOpaqueStippled;
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val.stipple = physDev->brush.pixmap;
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mask = GCStipple;
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break;
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case FillTiled:
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if (fMapColors && X11DRV_PALETTE_XPixelToPalette)
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{
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register int x, y;
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XImage *image;
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EnterCriticalSection( &X11DRV_CritSection );
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pixmap = XCreatePixmap( display,
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X11DRV_GetXRootWindow(),
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8, 8,
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MONITOR_GetDepth(&MONITOR_PrimaryMonitor) );
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image = XGetImage( display, physDev->brush.pixmap, 0, 0, 8, 8,
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AllPlanes, ZPixmap );
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for (y = 0; y < 8; y++)
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for (x = 0; x < 8; x++)
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XPutPixel( image, x, y,
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X11DRV_PALETTE_XPixelToPalette[XGetPixel( image, x, y)] );
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XPutImage( display, pixmap, gc, image, 0, 0, 0, 0, 8, 8 );
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XDestroyImage( image );
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LeaveCriticalSection( &X11DRV_CritSection );
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val.tile = pixmap;
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}
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else val.tile = physDev->brush.pixmap;
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mask = GCTile;
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break;
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default:
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mask = 0;
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break;
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}
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val.ts_x_origin = dc->w.DCOrgX + dc->w.brushOrgX;
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val.ts_y_origin = dc->w.DCOrgY + dc->w.brushOrgY;
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val.fill_rule = (dc->w.polyFillMode==WINDING) ? WindingRule : EvenOddRule;
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TSXChangeGC( display, gc,
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GCFunction | GCForeground | GCBackground | GCFillStyle |
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GCFillRule | GCTileStipXOrigin | GCTileStipYOrigin | mask,
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&val );
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if (pixmap) TSXFreePixmap( display, pixmap );
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return TRUE;
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}
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/***********************************************************************
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* X11DRV_SetupGCForBrush
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*
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* Setup physDev->gc for drawing operations using current brush.
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* Return FALSE if brush is BS_NULL, TRUE otherwise.
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*/
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BOOL X11DRV_SetupGCForBrush( DC * dc )
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{
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X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
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return X11DRV_SetupGCForPatBlt( dc, physDev->gc, FALSE );
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}
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/***********************************************************************
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* X11DRV_SetupGCForPen
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*
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* Setup physDev->gc for drawing operations using current pen.
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* Return FALSE if pen is PS_NULL, TRUE otherwise.
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*/
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BOOL X11DRV_SetupGCForPen( DC * dc )
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{
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XGCValues val;
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X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
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if (physDev->pen.style == PS_NULL) return FALSE;
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if (dc->w.flags & DC_DIRTY) CLIPPING_UpdateGCRegion(dc);
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switch (dc->w.ROPmode)
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{
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case R2_BLACK :
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val.foreground = BlackPixelOfScreen( X11DRV_GetXScreen() );
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val.function = GXcopy;
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break;
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case R2_WHITE :
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val.foreground = WhitePixelOfScreen( X11DRV_GetXScreen() );
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val.function = GXcopy;
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break;
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case R2_XORPEN :
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val.foreground = physDev->pen.pixel;
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/* It is very unlikely someone wants to XOR with 0 */
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/* This fixes the rubber-drawings in paintbrush */
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if (val.foreground == 0)
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val.foreground = BlackPixelOfScreen( X11DRV_GetXScreen() )
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^ WhitePixelOfScreen( X11DRV_GetXScreen() );
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val.function = GXxor;
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break;
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default :
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val.foreground = physDev->pen.pixel;
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val.function = X11DRV_XROPfunction[dc->w.ROPmode-1];
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}
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val.background = physDev->backgroundPixel;
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val.fill_style = FillSolid;
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if ((physDev->pen.width <= 1) &&
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(physDev->pen.style != PS_SOLID) &&
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(physDev->pen.style != PS_INSIDEFRAME))
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{
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TSXSetDashes( display, physDev->gc, 0, physDev->pen.dashes,
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physDev->pen.dash_len );
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val.line_style = (dc->w.backgroundMode == OPAQUE) ?
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LineDoubleDash : LineOnOffDash;
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}
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else val.line_style = LineSolid;
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val.line_width = physDev->pen.width;
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if (val.line_width <= 1) {
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val.cap_style = CapNotLast;
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} else {
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switch (physDev->pen.endcap)
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{
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case PS_ENDCAP_SQUARE:
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val.cap_style = CapProjecting;
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break;
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case PS_ENDCAP_FLAT:
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val.cap_style = CapButt;
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break;
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case PS_ENDCAP_ROUND:
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default:
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val.cap_style = CapRound;
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}
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}
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switch (physDev->pen.linejoin)
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{
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case PS_JOIN_BEVEL:
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val.join_style = JoinBevel;
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break;
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case PS_JOIN_MITER:
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val.join_style = JoinMiter;
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break;
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case PS_JOIN_ROUND:
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default:
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val.join_style = JoinRound;
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}
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TSXChangeGC( display, physDev->gc,
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GCFunction | GCForeground | GCBackground | GCLineWidth |
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GCLineStyle | GCCapStyle | GCJoinStyle | GCFillStyle, &val );
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return TRUE;
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}
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/***********************************************************************
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* X11DRV_SetupGCForText
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*
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* Setup physDev->gc for text drawing operations.
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* Return FALSE if the font is null, TRUE otherwise.
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*/
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BOOL X11DRV_SetupGCForText( DC * dc )
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{
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X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
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XFontStruct* xfs = XFONT_GetFontStruct( physDev->font );
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if( xfs )
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{
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XGCValues val;
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if (dc->w.flags & DC_DIRTY) CLIPPING_UpdateGCRegion(dc);
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val.function = GXcopy; /* Text is always GXcopy */
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val.foreground = physDev->textPixel;
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val.background = physDev->backgroundPixel;
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val.fill_style = FillSolid;
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val.font = xfs->fid;
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TSXChangeGC( display, physDev->gc,
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GCFunction | GCForeground | GCBackground | GCFillStyle |
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GCFont, &val );
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return TRUE;
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}
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WARN(graphics, "Physical font failure\n" );
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return FALSE;
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}
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/**********************************************************************
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* X11DRV_MoveToEx
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*/
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BOOL
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X11DRV_MoveToEx(DC *dc,INT x,INT y,LPPOINT pt) {
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if (pt)
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{
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pt->x = dc->w.CursPosX;
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pt->y = dc->w.CursPosY;
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}
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dc->w.CursPosX = x;
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dc->w.CursPosY = y;
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return TRUE;
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}
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/***********************************************************************
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* X11DRV_LineTo
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*/
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BOOL
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X11DRV_LineTo( DC *dc, INT x, INT y )
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{
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X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
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if (X11DRV_SetupGCForPen( dc ))
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TSXDrawLine(display, physDev->drawable, physDev->gc,
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dc->w.DCOrgX + XLPTODP( dc, dc->w.CursPosX ),
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dc->w.DCOrgY + YLPTODP( dc, dc->w.CursPosY ),
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dc->w.DCOrgX + XLPTODP( dc, x ),
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dc->w.DCOrgY + YLPTODP( dc, y ) );
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dc->w.CursPosX = x;
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dc->w.CursPosY = y;
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return TRUE;
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}
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/***********************************************************************
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* X11DRV_DrawArc
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*
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* Helper functions for Arc(), Chord() and Pie().
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* 'lines' is the number of lines to draw: 0 for Arc, 1 for Chord, 2 for Pie.
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*
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*/
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static BOOL
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X11DRV_DrawArc( DC *dc, INT left, INT top, INT right,
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INT bottom, INT xstart, INT ystart,
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INT xend, INT yend, INT lines )
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{
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INT xcenter, ycenter, istart_angle, idiff_angle;
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INT width, oldwidth, oldendcap;
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double start_angle, end_angle;
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XPoint points[4];
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X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
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left = XLPTODP( dc, left );
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top = YLPTODP( dc, top );
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right = XLPTODP( dc, right );
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bottom = YLPTODP( dc, bottom );
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xstart = XLPTODP( dc, xstart );
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ystart = YLPTODP( dc, ystart );
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xend = XLPTODP( dc, xend );
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yend = YLPTODP( dc, yend );
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if (right < left) { INT tmp = right; right = left; left = tmp; }
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if (bottom < top) { INT tmp = bottom; bottom = top; top = tmp; }
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if ((left == right) || (top == bottom)
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||(lines && ((right-left==1)||(bottom-top==1)))) return TRUE;
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oldwidth = width = physDev->pen.width;
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oldendcap = physDev->pen.endcap;
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if (!width) width = 1;
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if(physDev->pen.style == PS_NULL) width = 0;
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if ((physDev->pen.style == PS_INSIDEFRAME))
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{
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if (2*width > (right-left)) width=(right-left + 1)/2;
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if (2*width > (bottom-top)) width=(bottom-top + 1)/2;
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left += width / 2;
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right -= (width - 1) / 2;
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top += width / 2;
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bottom -= (width - 1) / 2;
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}
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if(width == 0) width = 1; /* more accurate */
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physDev->pen.width = width;
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physDev->pen.endcap = PS_ENDCAP_SQUARE;
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xcenter = (right + left) / 2;
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ycenter = (bottom + top) / 2;
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start_angle = atan2( (double)(ycenter-ystart)*(right-left),
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(double)(xstart-xcenter)*(bottom-top) );
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end_angle = atan2( (double)(ycenter-yend)*(right-left),
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(double)(xend-xcenter)*(bottom-top) );
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if ((xstart==xend)&&(ystart==yend))
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{ /* A lazy program delivers xstart=xend=ystart=yend=0) */
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start_angle = 0;
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end_angle = 2* PI;
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}
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else /* notorious cases */
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if ((start_angle == PI)&&( end_angle <0))
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start_angle = - PI;
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else
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if ((end_angle == PI)&&( start_angle <0))
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end_angle = - PI;
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istart_angle = (INT)(start_angle * 180 * 64 / PI + 0.5);
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idiff_angle = (INT)((end_angle - start_angle) * 180 * 64 / PI + 0.5);
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if (idiff_angle <= 0) idiff_angle += 360 * 64;
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/* Fill arc with brush if Chord() or Pie() */
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if ((lines > 0) && X11DRV_SetupGCForBrush( dc )) {
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TSXSetArcMode( display, physDev->gc,
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(lines==1) ? ArcChord : ArcPieSlice);
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TSXFillArc( display, physDev->drawable, physDev->gc,
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dc->w.DCOrgX + left, dc->w.DCOrgY + top,
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right-left-1, bottom-top-1, istart_angle, idiff_angle );
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}
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/* Draw arc and lines */
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if (X11DRV_SetupGCForPen( dc )){
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TSXDrawArc( display, physDev->drawable, physDev->gc,
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dc->w.DCOrgX + left, dc->w.DCOrgY + top,
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right-left-1, bottom-top-1, istart_angle, idiff_angle );
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if (lines) {
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/* use the truncated values */
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start_angle=(double)istart_angle*PI/64./180.;
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end_angle=(double)(istart_angle+idiff_angle)*PI/64./180.;
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/* calculate the endpoints and round correctly */
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points[0].x = (int) floor(dc->w.DCOrgX + (right+left)/2.0 +
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cos(start_angle) * (right-left-width*2+2) / 2. + 0.5);
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points[0].y = (int) floor(dc->w.DCOrgY + (top+bottom)/2.0 -
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sin(start_angle) * (bottom-top-width*2+2) / 2. + 0.5);
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points[1].x = (int) floor(dc->w.DCOrgX + (right+left)/2.0 +
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cos(end_angle) * (right-left-width*2+2) / 2. + 0.5);
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points[1].y = (int) floor(dc->w.DCOrgY + (top+bottom)/2.0 -
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sin(end_angle) * (bottom-top-width*2+2) / 2. + 0.5);
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/* OK this stuff is optimized for Xfree86
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* which is probably the most used server by
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* wine users. Other X servers will not
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* display correctly. (eXceed for instance)
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* so if you feel you must change make sure that
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* you either use Xfree86 or seperate your changes
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* from these (compile switch or whatever)
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*/
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if (lines == 2) {
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INT dx1,dy1;
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points[3] = points[1];
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points[1].x = dc->w.DCOrgX + xcenter;
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points[1].y = dc->w.DCOrgY + ycenter;
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points[2] = points[1];
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dx1=points[1].x-points[0].x;
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dy1=points[1].y-points[0].y;
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if(((top-bottom) | -2) == -2)
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if(dy1>0) points[1].y--;
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if(dx1<0) {
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if (((-dx1)*64)<=ABS(dy1)*37) points[0].x--;
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if(((-dx1*9))<(dy1*16)) points[0].y--;
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if( dy1<0 && ((dx1*9)) < (dy1*16)) points[0].y--;
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} else {
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if(dy1 < 0) points[0].y--;
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if(((right-left) | -2) == -2) points[1].x--;
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}
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dx1=points[3].x-points[2].x;
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dy1=points[3].y-points[2].y;
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if(((top-bottom) | -2 ) == -2)
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if(dy1 < 0) points[2].y--;
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if( dx1<0){
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if( dy1>0) points[3].y--;
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|
if(((right-left) | -2) == -2 ) points[2].x--;
|
|
}else {
|
|
points[3].y--;
|
|
if( dx1 * 64 < dy1 * -37 ) points[3].x--;
|
|
}
|
|
lines++;
|
|
}
|
|
TSXDrawLines( display, physDev->drawable, physDev->gc,
|
|
points, lines+1, CoordModeOrigin );
|
|
}
|
|
}
|
|
physDev->pen.width = oldwidth;
|
|
physDev->pen.endcap = oldendcap;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* X11DRV_Arc
|
|
*/
|
|
BOOL
|
|
X11DRV_Arc( DC *dc, INT left, INT top, INT right, INT bottom,
|
|
INT xstart, INT ystart, INT xend, INT yend )
|
|
{
|
|
return X11DRV_DrawArc( dc, left, top, right, bottom,
|
|
xstart, ystart, xend, yend, 0 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* X11DRV_Pie
|
|
*/
|
|
BOOL
|
|
X11DRV_Pie( DC *dc, INT left, INT top, INT right, INT bottom,
|
|
INT xstart, INT ystart, INT xend, INT yend )
|
|
{
|
|
return X11DRV_DrawArc( dc, left, top, right, bottom,
|
|
xstart, ystart, xend, yend, 2 );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* X11DRV_Chord
|
|
*/
|
|
BOOL
|
|
X11DRV_Chord( DC *dc, INT left, INT top, INT right, INT bottom,
|
|
INT xstart, INT ystart, INT xend, INT yend )
|
|
{
|
|
return X11DRV_DrawArc( dc, left, top, right, bottom,
|
|
xstart, ystart, xend, yend, 1 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* X11DRV_Ellipse
|
|
*/
|
|
BOOL
|
|
X11DRV_Ellipse( DC *dc, INT left, INT top, INT right, INT bottom )
|
|
{
|
|
INT width, oldwidth;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
left = XLPTODP( dc, left );
|
|
top = YLPTODP( dc, top );
|
|
right = XLPTODP( dc, right );
|
|
bottom = YLPTODP( dc, bottom );
|
|
if ((left == right) || (top == bottom)) return TRUE;
|
|
|
|
if (right < left) { INT tmp = right; right = left; left = tmp; }
|
|
if (bottom < top) { INT tmp = bottom; bottom = top; top = tmp; }
|
|
|
|
oldwidth = width = physDev->pen.width;
|
|
if (!width) width = 1;
|
|
if(physDev->pen.style == PS_NULL) width = 0;
|
|
|
|
if ((physDev->pen.style == PS_INSIDEFRAME))
|
|
{
|
|
if (2*width > (right-left)) width=(right-left + 1)/2;
|
|
if (2*width > (bottom-top)) width=(bottom-top + 1)/2;
|
|
left += width / 2;
|
|
right -= (width - 1) / 2;
|
|
top += width / 2;
|
|
bottom -= (width - 1) / 2;
|
|
}
|
|
if(width == 0) width = 1; /* more accurate */
|
|
physDev->pen.width = width;
|
|
|
|
if (X11DRV_SetupGCForBrush( dc ))
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
right-left-1, bottom-top-1, 0, 360*64 );
|
|
if (X11DRV_SetupGCForPen( dc ))
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
right-left-1, bottom-top-1, 0, 360*64 );
|
|
physDev->pen.width = oldwidth;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* X11DRV_Rectangle
|
|
*/
|
|
BOOL
|
|
X11DRV_Rectangle(DC *dc, INT left, INT top, INT right, INT bottom)
|
|
{
|
|
INT width, oldwidth, oldjoinstyle;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
TRACE(graphics, "(%d %d %d %d)\n",
|
|
left, top, right, bottom);
|
|
|
|
left = XLPTODP( dc, left );
|
|
top = YLPTODP( dc, top );
|
|
right = XLPTODP( dc, right );
|
|
bottom = YLPTODP( dc, bottom );
|
|
|
|
if ((left == right) || (top == bottom)) return TRUE;
|
|
|
|
if (right < left) { INT tmp = right; right = left; left = tmp; }
|
|
if (bottom < top) { INT tmp = bottom; bottom = top; top = tmp; }
|
|
|
|
oldwidth = width = physDev->pen.width;
|
|
if (!width) width = 1;
|
|
if(physDev->pen.style == PS_NULL) width = 0;
|
|
|
|
if ((physDev->pen.style == PS_INSIDEFRAME))
|
|
{
|
|
if (2*width > (right-left)) width=(right-left + 1)/2;
|
|
if (2*width > (bottom-top)) width=(bottom-top + 1)/2;
|
|
left += width / 2;
|
|
right -= (width - 1) / 2;
|
|
top += width / 2;
|
|
bottom -= (width - 1) / 2;
|
|
}
|
|
if(width == 1) width = 0;
|
|
physDev->pen.width = width;
|
|
oldjoinstyle = physDev->pen.linejoin;
|
|
if(physDev->pen.type != PS_GEOMETRIC)
|
|
physDev->pen.linejoin = PS_JOIN_MITER;
|
|
|
|
if ((right > left + width) && (bottom > top + width))
|
|
{
|
|
if (X11DRV_SetupGCForBrush( dc ))
|
|
TSXFillRectangle( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left + (width + 1) / 2,
|
|
dc->w.DCOrgY + top + (width + 1) / 2,
|
|
right-left-width-1, bottom-top-width-1);
|
|
}
|
|
if (X11DRV_SetupGCForPen( dc ))
|
|
TSXDrawRectangle( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
right-left-1, bottom-top-1 );
|
|
|
|
physDev->pen.width = oldwidth;
|
|
physDev->pen.linejoin = oldjoinstyle;
|
|
return TRUE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* X11DRV_RoundRect
|
|
*/
|
|
BOOL
|
|
X11DRV_RoundRect( DC *dc, INT left, INT top, INT right,
|
|
INT bottom, INT ell_width, INT ell_height )
|
|
{
|
|
INT width, oldwidth, oldendcap;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
TRACE(graphics, "(%d %d %d %d %d %d\n",
|
|
left, top, right, bottom, ell_width, ell_height);
|
|
|
|
left = XLPTODP( dc, left );
|
|
top = YLPTODP( dc, top );
|
|
right = XLPTODP( dc, right );
|
|
bottom = YLPTODP( dc, bottom );
|
|
|
|
if ((left == right) || (top == bottom))
|
|
return TRUE;
|
|
|
|
/* Make sure ell_width and ell_height are >= 1 otherwise XDrawArc gets
|
|
called with width/height < 0 */
|
|
ell_width = MAX(abs( ell_width * dc->vportExtX / dc->wndExtX ), 1);
|
|
ell_height = MAX(abs( ell_height * dc->vportExtY / dc->wndExtY ), 1);
|
|
|
|
/* Fix the coordinates */
|
|
|
|
if (right < left) { INT tmp = right; right = left; left = tmp; }
|
|
if (bottom < top) { INT tmp = bottom; bottom = top; top = tmp; }
|
|
|
|
oldwidth = width = physDev->pen.width;
|
|
oldendcap = physDev->pen.endcap;
|
|
if (!width) width = 1;
|
|
if(physDev->pen.style == PS_NULL) width = 0;
|
|
|
|
if ((physDev->pen.style == PS_INSIDEFRAME))
|
|
{
|
|
if (2*width > (right-left)) width=(right-left + 1)/2;
|
|
if (2*width > (bottom-top)) width=(bottom-top + 1)/2;
|
|
left += width / 2;
|
|
right -= (width - 1) / 2;
|
|
top += width / 2;
|
|
bottom -= (width - 1) / 2;
|
|
}
|
|
if(width == 0) width = 1;
|
|
physDev->pen.width = width;
|
|
physDev->pen.endcap = PS_ENDCAP_SQUARE;
|
|
|
|
if (X11DRV_SetupGCForBrush( dc ))
|
|
{
|
|
if (ell_width > (right-left) )
|
|
if (ell_height > (bottom-top) )
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
right - left - 1, bottom - top - 1,
|
|
0, 360 * 64 );
|
|
else{
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
right - left - 1, ell_height, 0, 180 * 64 );
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left,
|
|
dc->w.DCOrgY + bottom - ell_height - 1,
|
|
right - left - 1, ell_height, 180 * 64,
|
|
180 * 64 );
|
|
}
|
|
else if (ell_height > (bottom-top) ){
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
ell_width, bottom - top - 1, 90 * 64, 180 * 64 );
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + right - ell_width -1, dc->w.DCOrgY + top,
|
|
ell_width, bottom - top - 1, 270 * 64, 180 * 64 );
|
|
}else{
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
ell_width, ell_height, 90 * 64, 90 * 64 );
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left,
|
|
dc->w.DCOrgY + bottom - ell_height - 1,
|
|
ell_width, ell_height, 180 * 64, 90 * 64 );
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + right - ell_width - 1,
|
|
dc->w.DCOrgY + bottom - ell_height - 1,
|
|
ell_width, ell_height, 270 * 64, 90 * 64 );
|
|
TSXFillArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + right - ell_width - 1,
|
|
dc->w.DCOrgY + top,
|
|
ell_width, ell_height, 0, 90 * 64 );
|
|
}
|
|
if (ell_width < right - left)
|
|
{
|
|
TSXFillRectangle( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left + (ell_width + 1) / 2,
|
|
dc->w.DCOrgY + top + 1,
|
|
right - left - ell_width - 1,
|
|
(ell_height + 1) / 2 - 1);
|
|
TSXFillRectangle( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left + (ell_width + 1) / 2,
|
|
dc->w.DCOrgY + bottom - (ell_height) / 2 - 1,
|
|
right - left - ell_width - 1,
|
|
(ell_height) / 2 );
|
|
}
|
|
if (ell_height < bottom - top)
|
|
{
|
|
TSXFillRectangle( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left + 1,
|
|
dc->w.DCOrgY + top + (ell_height + 1) / 2,
|
|
right - left - 2,
|
|
bottom - top - ell_height - 1);
|
|
}
|
|
}
|
|
/* FIXME: this could be done with on X call
|
|
* more efficient and probably more correct
|
|
* on any X server: XDrawArcs will draw
|
|
* straight horizontal and vertical lines
|
|
* if width or height are zero.
|
|
*
|
|
* BTW this stuff is optimized for an Xfree86 server
|
|
* read the comments inside the X11DRV_DrawArc function
|
|
*/
|
|
if (X11DRV_SetupGCForPen(dc)) {
|
|
if (ell_width > (right-left) )
|
|
if (ell_height > (bottom-top) )
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
right - left - 1, bottom -top - 1, 0 , 360 * 64 );
|
|
else{
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
right - left - 1, ell_height - 1, 0 , 180 * 64 );
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left,
|
|
dc->w.DCOrgY + bottom - ell_height,
|
|
right - left - 1, ell_height - 1, 180 * 64 , 180 * 64 );
|
|
}
|
|
else if (ell_height > (bottom-top) ){
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
ell_width - 1 , bottom - top - 1, 90 * 64 , 180 * 64 );
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + right - ell_width,
|
|
dc->w.DCOrgY + top,
|
|
ell_width - 1 , bottom - top - 1, 270 * 64 , 180 * 64 );
|
|
}else{
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + top,
|
|
ell_width - 1, ell_height - 1, 90 * 64, 90 * 64 );
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left, dc->w.DCOrgY + bottom - ell_height,
|
|
ell_width - 1, ell_height - 1, 180 * 64, 90 * 64 );
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + right - ell_width,
|
|
dc->w.DCOrgY + bottom - ell_height,
|
|
ell_width - 1, ell_height - 1, 270 * 64, 90 * 64 );
|
|
TSXDrawArc( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + right - ell_width, dc->w.DCOrgY + top,
|
|
ell_width - 1, ell_height - 1, 0, 90 * 64 );
|
|
}
|
|
if (ell_width < right - left)
|
|
{
|
|
TSXDrawLine( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left + ell_width / 2,
|
|
dc->w.DCOrgY + top,
|
|
dc->w.DCOrgX + right - (ell_width+1) / 2,
|
|
dc->w.DCOrgY + top);
|
|
TSXDrawLine( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left + ell_width / 2 ,
|
|
dc->w.DCOrgY + bottom - 1,
|
|
dc->w.DCOrgX + right - (ell_width+1)/ 2,
|
|
dc->w.DCOrgY + bottom - 1);
|
|
}
|
|
if (ell_height < bottom - top)
|
|
{
|
|
TSXDrawLine( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + right - 1,
|
|
dc->w.DCOrgY + top + ell_height / 2,
|
|
dc->w.DCOrgX + right - 1,
|
|
dc->w.DCOrgY + bottom - (ell_height+1) / 2);
|
|
TSXDrawLine( display, physDev->drawable, physDev->gc,
|
|
dc->w.DCOrgX + left,
|
|
dc->w.DCOrgY + top + ell_height / 2,
|
|
dc->w.DCOrgX + left,
|
|
dc->w.DCOrgY + bottom - (ell_height+1) / 2);
|
|
}
|
|
}
|
|
physDev->pen.width = oldwidth;
|
|
physDev->pen.endcap = oldendcap;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* X11DRV_SetPixel
|
|
*/
|
|
COLORREF
|
|
X11DRV_SetPixel( DC *dc, INT x, INT y, COLORREF color )
|
|
{
|
|
Pixel pixel;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
x = dc->w.DCOrgX + XLPTODP( dc, x );
|
|
y = dc->w.DCOrgY + YLPTODP( dc, y );
|
|
pixel = X11DRV_PALETTE_ToPhysical( dc, color );
|
|
|
|
TSXSetForeground( display, physDev->gc, pixel );
|
|
TSXSetFunction( display, physDev->gc, GXcopy );
|
|
TSXDrawPoint( display, physDev->drawable, physDev->gc, x, y );
|
|
|
|
/* inefficient but simple... */
|
|
|
|
return X11DRV_PALETTE_ToLogical(pixel);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* X11DRV_GetPixel
|
|
*/
|
|
COLORREF
|
|
X11DRV_GetPixel( DC *dc, INT x, INT y )
|
|
{
|
|
static Pixmap pixmap = 0;
|
|
XImage * image;
|
|
int pixel;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
x = dc->w.DCOrgX + XLPTODP( dc, x );
|
|
y = dc->w.DCOrgY + YLPTODP( dc, y );
|
|
EnterCriticalSection( &X11DRV_CritSection );
|
|
if (dc->w.flags & DC_MEMORY)
|
|
{
|
|
image = XGetImage( display, physDev->drawable, x, y, 1, 1,
|
|
AllPlanes, ZPixmap );
|
|
}
|
|
else
|
|
{
|
|
/* If we are reading from the screen, use a temporary copy */
|
|
/* to avoid a BadMatch error */
|
|
if (!pixmap) pixmap = XCreatePixmap( display, X11DRV_GetXRootWindow(),
|
|
1, 1, dc->w.bitsPerPixel );
|
|
XCopyArea( display, physDev->drawable, pixmap, BITMAP_colorGC,
|
|
x, y, 1, 1, 0, 0 );
|
|
image = XGetImage( display, pixmap, 0, 0, 1, 1, AllPlanes, ZPixmap );
|
|
}
|
|
pixel = XGetPixel( image, 0, 0 );
|
|
XDestroyImage( image );
|
|
LeaveCriticalSection( &X11DRV_CritSection );
|
|
|
|
return X11DRV_PALETTE_ToLogical(pixel);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* X11DRV_PaintRgn
|
|
*/
|
|
BOOL
|
|
X11DRV_PaintRgn( DC *dc, HRGN hrgn )
|
|
{
|
|
RECT box;
|
|
HRGN tmpVisRgn, prevVisRgn;
|
|
HDC hdc = dc->hSelf; /* FIXME: should not mix dc/hdc this way */
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
if (!(tmpVisRgn = CreateRectRgn( 0, 0, 0, 0 ))) return FALSE;
|
|
|
|
/* Transform region into device co-ords */
|
|
if ( !REGION_LPTODP( hdc, tmpVisRgn, hrgn )
|
|
|| OffsetRgn( tmpVisRgn, dc->w.DCOrgX, dc->w.DCOrgY ) == ERROR) {
|
|
DeleteObject( tmpVisRgn );
|
|
return FALSE;
|
|
}
|
|
|
|
/* Modify visible region */
|
|
if (!(prevVisRgn = SaveVisRgn16( hdc ))) {
|
|
DeleteObject( tmpVisRgn );
|
|
return FALSE;
|
|
}
|
|
CombineRgn( tmpVisRgn, prevVisRgn, tmpVisRgn, RGN_AND );
|
|
SelectVisRgn16( hdc, tmpVisRgn );
|
|
DeleteObject( tmpVisRgn );
|
|
|
|
/* Fill the region */
|
|
|
|
GetRgnBox( dc->w.hGCClipRgn, &box );
|
|
if (X11DRV_SetupGCForBrush( dc ))
|
|
TSXFillRectangle( display, physDev->drawable, physDev->gc,
|
|
box.left, box.top,
|
|
box.right-box.left, box.bottom-box.top );
|
|
|
|
/* Restore the visible region */
|
|
|
|
RestoreVisRgn16( hdc );
|
|
return TRUE;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* X11DRV_Polyline
|
|
*/
|
|
BOOL
|
|
X11DRV_Polyline( DC *dc, const POINT* pt, INT count )
|
|
{
|
|
INT oldwidth;
|
|
register int i;
|
|
XPoint *points;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
if((oldwidth = physDev->pen.width) == 0) physDev->pen.width = 1;
|
|
|
|
points = (XPoint *) xmalloc (sizeof (XPoint) * (count));
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
points[i].x = dc->w.DCOrgX + XLPTODP( dc, pt[i].x );
|
|
points[i].y = dc->w.DCOrgY + YLPTODP( dc, pt[i].y );
|
|
}
|
|
|
|
if (X11DRV_SetupGCForPen ( dc ))
|
|
TSXDrawLines( display, physDev->drawable, physDev->gc,
|
|
points, count, CoordModeOrigin );
|
|
|
|
free( points );
|
|
physDev->pen.width = oldwidth;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* X11DRV_Polygon
|
|
*/
|
|
BOOL
|
|
X11DRV_Polygon( DC *dc, const POINT* pt, INT count )
|
|
{
|
|
register int i;
|
|
XPoint *points;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
points = (XPoint *) xmalloc (sizeof (XPoint) * (count+1));
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
points[i].x = dc->w.DCOrgX + XLPTODP( dc, pt[i].x );
|
|
points[i].y = dc->w.DCOrgY + YLPTODP( dc, pt[i].y );
|
|
}
|
|
points[count] = points[0];
|
|
|
|
if (X11DRV_SetupGCForBrush( dc ))
|
|
TSXFillPolygon( display, physDev->drawable, physDev->gc,
|
|
points, count+1, Complex, CoordModeOrigin);
|
|
|
|
if (X11DRV_SetupGCForPen ( dc ))
|
|
TSXDrawLines( display, physDev->drawable, physDev->gc,
|
|
points, count+1, CoordModeOrigin );
|
|
|
|
free( points );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* X11DRV_PolyPolygon
|
|
*/
|
|
BOOL
|
|
X11DRV_PolyPolygon( DC *dc, const POINT* pt, const INT* counts, UINT polygons)
|
|
{
|
|
HRGN hrgn;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
/* FIXME: The points should be converted to device coords before */
|
|
/* creating the region. */
|
|
|
|
hrgn = CreatePolyPolygonRgn( pt, counts, polygons, dc->w.polyFillMode );
|
|
X11DRV_PaintRgn( dc, hrgn );
|
|
DeleteObject( hrgn );
|
|
|
|
/* Draw the outline of the polygons */
|
|
|
|
if (X11DRV_SetupGCForPen ( dc ))
|
|
{
|
|
int i, j, max = 0;
|
|
XPoint *points;
|
|
|
|
for (i = 0; i < polygons; i++) if (counts[i] > max) max = counts[i];
|
|
points = (XPoint *) xmalloc( sizeof(XPoint) * (max+1) );
|
|
|
|
for (i = 0; i < polygons; i++)
|
|
{
|
|
for (j = 0; j < counts[i]; j++)
|
|
{
|
|
points[j].x = dc->w.DCOrgX + XLPTODP( dc, pt->x );
|
|
points[j].y = dc->w.DCOrgY + YLPTODP( dc, pt->y );
|
|
pt++;
|
|
}
|
|
points[j] = points[0];
|
|
TSXDrawLines( display, physDev->drawable, physDev->gc,
|
|
points, j + 1, CoordModeOrigin );
|
|
}
|
|
free( points );
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* X11DRV_PolyPolyline
|
|
*/
|
|
BOOL
|
|
X11DRV_PolyPolyline( DC *dc, const POINT* pt, const DWORD* counts, DWORD polylines )
|
|
{
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
if (X11DRV_SetupGCForPen ( dc ))
|
|
{
|
|
int i, j, max = 0;
|
|
XPoint *points;
|
|
|
|
for (i = 0; i < polylines; i++) if (counts[i] > max) max = counts[i];
|
|
points = (XPoint *) xmalloc( sizeof(XPoint) * (max+1) );
|
|
|
|
for (i = 0; i < polylines; i++)
|
|
{
|
|
for (j = 0; j < counts[i]; j++)
|
|
{
|
|
points[j].x = dc->w.DCOrgX + XLPTODP( dc, pt->x );
|
|
points[j].y = dc->w.DCOrgY + YLPTODP( dc, pt->y );
|
|
pt++;
|
|
}
|
|
points[j] = points[0];
|
|
TSXDrawLines( display, physDev->drawable, physDev->gc,
|
|
points, j + 1, CoordModeOrigin );
|
|
}
|
|
free( points );
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* X11DRV_InternalFloodFill
|
|
*
|
|
* Internal helper function for flood fill.
|
|
* (xorg,yorg) is the origin of the X image relative to the drawable.
|
|
* (x,y) is relative to the origin of the X image.
|
|
*/
|
|
static void X11DRV_InternalFloodFill(XImage *image, DC *dc,
|
|
int x, int y,
|
|
int xOrg, int yOrg,
|
|
Pixel pixel, WORD fillType )
|
|
{
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
int left, right;
|
|
|
|
#define TO_FLOOD(x,y) ((fillType == FLOODFILLBORDER) ? \
|
|
(XGetPixel(image,x,y) != pixel) : \
|
|
(XGetPixel(image,x,y) == pixel))
|
|
|
|
if (!TO_FLOOD(x,y)) return;
|
|
|
|
/* Find left and right boundaries */
|
|
|
|
left = right = x;
|
|
while ((left > 0) && TO_FLOOD( left-1, y )) left--;
|
|
while ((right < image->width) && TO_FLOOD( right, y )) right++;
|
|
XFillRectangle( display, physDev->drawable, physDev->gc,
|
|
xOrg + left, yOrg + y, right-left, 1 );
|
|
|
|
/* Set the pixels of this line so we don't fill it again */
|
|
|
|
for (x = left; x < right; x++)
|
|
{
|
|
if (fillType == FLOODFILLBORDER) XPutPixel( image, x, y, pixel );
|
|
else XPutPixel( image, x, y, ~pixel );
|
|
}
|
|
|
|
/* Fill the line above */
|
|
|
|
if (--y >= 0)
|
|
{
|
|
x = left;
|
|
while (x < right)
|
|
{
|
|
while ((x < right) && !TO_FLOOD(x,y)) x++;
|
|
if (x >= right) break;
|
|
while ((x < right) && TO_FLOOD(x,y)) x++;
|
|
X11DRV_InternalFloodFill(image, dc, x-1, y,
|
|
xOrg, yOrg, pixel, fillType );
|
|
}
|
|
}
|
|
|
|
/* Fill the line below */
|
|
|
|
if ((y += 2) < image->height)
|
|
{
|
|
x = left;
|
|
while (x < right)
|
|
{
|
|
while ((x < right) && !TO_FLOOD(x,y)) x++;
|
|
if (x >= right) break;
|
|
while ((x < right) && TO_FLOOD(x,y)) x++;
|
|
X11DRV_InternalFloodFill(image, dc, x-1, y,
|
|
xOrg, yOrg, pixel, fillType );
|
|
}
|
|
}
|
|
#undef TO_FLOOD
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* X11DRV_DoFloodFill
|
|
*
|
|
* Main flood-fill routine.
|
|
*
|
|
* The Xlib critical section must be entered before calling this function.
|
|
*/
|
|
|
|
struct FloodFill_params
|
|
{
|
|
DC *dc;
|
|
INT x;
|
|
INT y;
|
|
COLORREF color;
|
|
UINT fillType;
|
|
};
|
|
|
|
static BOOL X11DRV_DoFloodFill( const struct FloodFill_params *params )
|
|
{
|
|
XImage *image;
|
|
RECT rect;
|
|
DC *dc = params->dc;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
if (GetRgnBox( dc->w.hGCClipRgn, &rect ) == ERROR) return FALSE;
|
|
|
|
if (!(image = XGetImage( display, physDev->drawable,
|
|
rect.left,
|
|
rect.top,
|
|
rect.right - rect.left,
|
|
rect.bottom - rect.top,
|
|
AllPlanes, ZPixmap ))) return FALSE;
|
|
|
|
if (X11DRV_SetupGCForBrush( dc ))
|
|
{
|
|
/* ROP mode is always GXcopy for flood-fill */
|
|
XSetFunction( display, physDev->gc, GXcopy );
|
|
X11DRV_InternalFloodFill(image, dc,
|
|
XLPTODP(dc,params->x) + dc->w.DCOrgX - rect.left,
|
|
YLPTODP(dc,params->y) + dc->w.DCOrgY - rect.top,
|
|
rect.left,
|
|
rect.top,
|
|
X11DRV_PALETTE_ToPhysical( dc, params->color ),
|
|
params->fillType );
|
|
}
|
|
|
|
XDestroyImage( image );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* X11DRV_ExtFloodFill
|
|
*/
|
|
BOOL
|
|
X11DRV_ExtFloodFill( DC *dc, INT x, INT y, COLORREF color,
|
|
UINT fillType )
|
|
{
|
|
BOOL result;
|
|
struct FloodFill_params params;
|
|
|
|
TRACE(graphics, "X11DRV_ExtFloodFill %d,%d %06lx %d\n",
|
|
x, y, color, fillType );
|
|
|
|
params.dc = dc;
|
|
params.x = x;
|
|
params.y = y;
|
|
params.color = color;
|
|
params.fillType = fillType;
|
|
|
|
if (!PtVisible( dc->hSelf, x, y )) return FALSE;
|
|
EnterCriticalSection( &X11DRV_CritSection );
|
|
result = CALL_LARGE_STACK( X11DRV_DoFloodFill, ¶ms );
|
|
LeaveCriticalSection( &X11DRV_CritSection );
|
|
return result;
|
|
}
|
|
|
|
/******************************************************************
|
|
*
|
|
* *Very* simple bezier drawing code,
|
|
*
|
|
* It uses a recursive algorithm to divide the curve in a series
|
|
* of straight line segements. Not ideal but for me sufficient.
|
|
* If you are in need for something better look for some incremental
|
|
* algorithm.
|
|
*
|
|
* 7 July 1998 Rein Klazes
|
|
*/
|
|
|
|
/*
|
|
* some macro definitions for bezier drawing
|
|
*
|
|
* to avoid trucation errors the coordinates are
|
|
* shifted upwards. When used in drawing they are
|
|
* shifted down again, including correct rounding
|
|
* and avoiding floating point arithmatic
|
|
* 4 bits should allow 27 bits coordinates which I saw
|
|
* somewere in the win32 doc's
|
|
*
|
|
*/
|
|
|
|
#define BEZIERSHIFTBITS 4
|
|
#define BEZIERSHIFTUP(x) ((x)<<BEZIERSHIFTBITS)
|
|
#define BEZIERPIXEL BEZIERSHIFTUP(1)
|
|
#define BEZIERSHIFTDOWN(x) (((x)+(1<<(BEZIERSHIFTBITS-1)))>>BEZIERSHIFTBITS)
|
|
/* maximum depth of recursion */
|
|
#define BEZIERMAXDEPTH 8
|
|
|
|
/* size of array to store points on */
|
|
/* enough for one curve */
|
|
#define BEZMAXPOINTS (150)
|
|
|
|
/* calculate Bezier average, in this case the middle
|
|
* correctly rounded...
|
|
* */
|
|
|
|
#define BEZIERMIDDLE(Mid, P1, P2) \
|
|
(Mid).x=((P1).x+(P2).x + 1)/2;\
|
|
(Mid).y=((P1).y+(P2).y + 1)/2;
|
|
|
|
/**********************************************************
|
|
* BezierCheck helper function to check
|
|
* that recursion can be terminated
|
|
* Points[0] and Points[3] are begin and endpoint
|
|
* Points[1] and Points[2] are control points
|
|
* level is the recursion depth
|
|
* returns true if the recusion can be terminated
|
|
*/
|
|
static BOOL BezierCheck( int level, POINT *Points)
|
|
{
|
|
INT dx, dy;
|
|
dx=Points[3].x-Points[0].x;
|
|
dy=Points[3].y-Points[0].y;
|
|
if(ABS(dy)<=ABS(dx)){/* shallow line */
|
|
/* check that control points are between begin and end */
|
|
if(Points[1].x < Points[0].x){
|
|
if(Points[1].x < Points[3].x)
|
|
return FALSE;
|
|
}else
|
|
if(Points[1].x > Points[3].x)
|
|
return FALSE;
|
|
if(Points[2].x < Points[0].x){
|
|
if(Points[2].x < Points[3].x)
|
|
return FALSE;
|
|
}else
|
|
if(Points[2].x > Points[3].x)
|
|
return FALSE;
|
|
dx=BEZIERSHIFTDOWN(dx);
|
|
if(!dx) return TRUE;
|
|
if(abs(Points[1].y-Points[0].y-(dy/dx)*
|
|
BEZIERSHIFTDOWN(Points[1].x-Points[0].x)) > BEZIERPIXEL ||
|
|
abs(Points[2].y-Points[0].y-(dy/dx)*
|
|
BEZIERSHIFTDOWN(Points[2].x-Points[0].x)) > BEZIERPIXEL )
|
|
return FALSE;
|
|
else
|
|
return TRUE;
|
|
}else{ /* steep line */
|
|
/* check that control points are between begin and end */
|
|
if(Points[1].y < Points[0].y){
|
|
if(Points[1].y < Points[3].y)
|
|
return FALSE;
|
|
}else
|
|
if(Points[1].y > Points[3].y)
|
|
return FALSE;
|
|
if(Points[2].y < Points[0].y){
|
|
if(Points[2].y < Points[3].y)
|
|
return FALSE;
|
|
}else
|
|
if(Points[2].y > Points[3].y)
|
|
return FALSE;
|
|
dy=BEZIERSHIFTDOWN(dy);
|
|
if(!dy) return TRUE;
|
|
if(abs(Points[1].x-Points[0].x-(dx/dy)*
|
|
BEZIERSHIFTDOWN(Points[1].y-Points[0].y)) > BEZIERPIXEL ||
|
|
abs(Points[2].x-Points[0].x-(dx/dy)*
|
|
BEZIERSHIFTDOWN(Points[2].y-Points[0].y)) > BEZIERPIXEL )
|
|
return FALSE;
|
|
else
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/***********************************************************************
|
|
* X11DRV_Bezier
|
|
* Draw a -what microsoft calls- bezier curve
|
|
* The routine recursively devides the curve
|
|
* in two parts until a straight line can be drawn
|
|
*
|
|
* level recusion depth counted backwards
|
|
* dc device context
|
|
* Points array of begin(0), end(3) and control points(1 and 2)
|
|
* XPoints array with points calculated sofar
|
|
* *pIx nr points calculated sofar
|
|
*
|
|
*/
|
|
static void X11DRV_Bezier(int level, DC * dc, POINT *Points,
|
|
XPoint* xpoints, unsigned int* pIx)
|
|
{
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
if(*pIx == BEZMAXPOINTS){
|
|
TSXDrawLines( display, physDev->drawable, physDev->gc,
|
|
xpoints, *pIx, CoordModeOrigin );
|
|
*pIx=0;
|
|
}
|
|
if(!level || BezierCheck(level, Points)) {
|
|
if(*pIx == 0){
|
|
xpoints[*pIx].x= dc->w.DCOrgX + BEZIERSHIFTDOWN(Points[0].x);
|
|
xpoints[*pIx].y= dc->w.DCOrgY + BEZIERSHIFTDOWN(Points[0].y);
|
|
*pIx=1;
|
|
}
|
|
xpoints[*pIx].x= dc->w.DCOrgX + BEZIERSHIFTDOWN(Points[3].x);
|
|
xpoints[*pIx].y= dc->w.DCOrgY + BEZIERSHIFTDOWN(Points[3].y);
|
|
(*pIx) ++;
|
|
} else {
|
|
POINT Points2[4]; /* for the second recursive call */
|
|
Points2[3]=Points[3];
|
|
BEZIERMIDDLE(Points2[2], Points[2], Points[3]);
|
|
BEZIERMIDDLE(Points2[0], Points[1], Points[2]);
|
|
BEZIERMIDDLE(Points2[1],Points2[0],Points2[2]);
|
|
|
|
BEZIERMIDDLE(Points[1], Points[0], Points[1]);
|
|
BEZIERMIDDLE(Points[2], Points[1], Points2[0]);
|
|
BEZIERMIDDLE(Points[3], Points[2], Points2[1]);
|
|
|
|
Points2[0]=Points[3];
|
|
|
|
/* do the two halves */
|
|
X11DRV_Bezier(level-1, dc, Points, xpoints, pIx);
|
|
X11DRV_Bezier(level-1, dc, Points2, xpoints, pIx);
|
|
}
|
|
}
|
|
|
|
/***********************************************************************
|
|
* X11DRV_PolyBezier
|
|
* Implement functionality for PolyBezier and PolyBezierTo
|
|
* calls.
|
|
* [i] dc pointer to device context
|
|
* [i] start, first point in curve
|
|
* [i] BezierPoints , array of point filled with rest of the points
|
|
* [i] count, number of points in BezierPoints, must be a
|
|
* multiple of 3.
|
|
*/
|
|
BOOL
|
|
X11DRV_PolyBezier(DC *dc, POINT start, const POINT* BezierPoints, DWORD count)
|
|
{
|
|
POINT Points[4];
|
|
int i;
|
|
unsigned int ix=0;
|
|
XPoint* xpoints;
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
|
|
TRACE(graphics, "dc=%p count=%ld %ld,%ld - %ld,%ld - %ld,%ld - %ld,%ld\n",
|
|
dc, count,
|
|
start.x, start.y,
|
|
(Points+0)->x, (Points+0)->y,
|
|
(Points+1)->x, (Points+1)->y,
|
|
(Points+2)->x, (Points+2)->y);
|
|
if(!count || count % 3){/* paranoid */
|
|
WARN(graphics," bad value for count : %ld\n", count);
|
|
return FALSE;
|
|
}
|
|
xpoints=(XPoint*) xmalloc( sizeof(XPoint)*BEZMAXPOINTS);
|
|
Points[3].x=BEZIERSHIFTUP(XLPTODP(dc,start.x));
|
|
Points[3].y=BEZIERSHIFTUP(YLPTODP(dc,start.y));
|
|
while(count){
|
|
Points[0]=Points[3];
|
|
for(i=1;i<4;i++) {
|
|
Points[i].x= BEZIERSHIFTUP(XLPTODP(dc,BezierPoints->x));
|
|
Points[i].y= BEZIERSHIFTUP(YLPTODP(dc,BezierPoints->y));
|
|
BezierPoints++;
|
|
}
|
|
X11DRV_Bezier(BEZIERMAXDEPTH , dc, Points, xpoints, &ix );
|
|
count -=3;
|
|
}
|
|
if( ix) TSXDrawLines( display, physDev->drawable, physDev->gc,
|
|
xpoints, ix, CoordModeOrigin );
|
|
free(xpoints);
|
|
return TRUE;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* X11DRV_SetBkColor
|
|
*/
|
|
COLORREF
|
|
X11DRV_SetBkColor( DC *dc, COLORREF color )
|
|
{
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
COLORREF oldColor;
|
|
|
|
oldColor = dc->w.backgroundColor;
|
|
dc->w.backgroundColor = color;
|
|
|
|
physDev->backgroundPixel = X11DRV_PALETTE_ToPhysical( dc, color );
|
|
|
|
return oldColor;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* X11DRV_SetTextColor
|
|
*/
|
|
COLORREF
|
|
X11DRV_SetTextColor( DC *dc, COLORREF color )
|
|
{
|
|
X11DRV_PDEVICE *physDev = (X11DRV_PDEVICE *)dc->physDev;
|
|
COLORREF oldColor;
|
|
|
|
oldColor = dc->w.textColor;
|
|
dc->w.textColor = color;
|
|
|
|
physDev->textPixel = X11DRV_PALETTE_ToPhysical( dc, color );
|
|
|
|
return oldColor;
|
|
}
|
|
|
|
#endif /* !defined(X_DISPLAY_MISSING) */
|