518 lines
15 KiB
C
518 lines
15 KiB
C
/*
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* GDI graphics operations
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*
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* Copyright 1993 Alexandre Julliard
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*/
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static char Copyright[] = "Copyright Alexandre Julliard, 1993";
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#include <math.h>
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#include <X11/Xlib.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 "gdi.h"
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/***********************************************************************
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* LineTo (GDI.19)
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*/
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BOOL LineTo( HDC hdc, short x, short y )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return FALSE;
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if (DC_SetupGCForPen( dc ))
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XDrawLine(XT_display, dc->u.x.drawable, dc->u.x.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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* MoveTo (GDI.20)
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*/
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DWORD MoveTo( HDC hdc, short x, short y )
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{
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POINT pt;
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if (MoveToEx( hdc, x, y, &pt )) return pt.x | (pt.y << 16);
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else return 0;
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}
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/***********************************************************************
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* MoveToEx (GDI.483)
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*/
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BOOL MoveToEx( HDC hdc, short x, short y, LPPOINT pt )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return FALSE;
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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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* GRAPH_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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BOOL GRAPH_DrawArc( HDC hdc, int left, int top, int right, int bottom,
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int xstart, int ystart, int xend, int yend, int lines )
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{
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int xcenter, ycenter;
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double start_angle, end_angle, diff_angle;
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XPoint points[3];
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return FALSE;
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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 ((left == right) || (top == bottom)) return FALSE;
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if (!DC_SetupGCForPen( dc )) return TRUE;
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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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diff_angle = end_angle - start_angle;
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if (diff_angle < 0.0) diff_angle += 2*PI;
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XDrawArc( XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + left, dc->w.DCOrgY + top,
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right-left-1, bottom-top-1,
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(int)(start_angle * 180 * 64 / PI),
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(int)(diff_angle * 180 * 64 / PI) );
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if (!lines) return TRUE;
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points[0].x = dc->w.DCOrgX + xcenter + (int)(cos(start_angle) * (right-left) / 2);
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points[0].y = dc->w.DCOrgY + ycenter - (int)(sin(start_angle) * (bottom-top) / 2);
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points[1].x = dc->w.DCOrgX + xcenter + (int)(cos(end_angle) * (right-left) / 2);
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points[1].y = dc->w.DCOrgY + ycenter - (int)(sin(end_angle) * (bottom-top) / 2);
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if (lines == 2)
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{
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points[2] = 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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}
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XDrawLines( XT_display, dc->u.x.drawable, dc->u.x.gc,
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points, lines+1, CoordModeOrigin );
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return TRUE;
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}
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/***********************************************************************
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* Arc (GDI.23)
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*/
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BOOL Arc( HDC hdc, int left, int top, int right, int bottom,
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int xstart, int ystart, int xend, int yend )
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{
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return GRAPH_DrawArc( hdc, left, top, right, bottom,
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xstart, ystart, xend, yend, 0 );
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}
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/***********************************************************************
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* Pie (GDI.26)
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*/
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BOOL Pie( HDC hdc, int left, int top, int right, int bottom,
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int xstart, int ystart, int xend, int yend )
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{
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return GRAPH_DrawArc( hdc, left, top, right, bottom,
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xstart, ystart, xend, yend, 2 );
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}
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/***********************************************************************
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* Chord (GDI.348)
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*/
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BOOL Chord( HDC hdc, int left, int top, int right, int bottom,
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int xstart, int ystart, int xend, int yend )
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{
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return GRAPH_DrawArc( hdc, left, top, right, bottom,
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xstart, ystart, xend, yend, 1 );
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}
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/***********************************************************************
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* Ellipse (GDI.24)
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*/
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BOOL Ellipse( HDC hdc, int left, int top, int right, int bottom )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return FALSE;
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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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if ((left == right) || (top == bottom)) return FALSE;
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if (DC_SetupGCForBrush( dc ))
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XFillArc( XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + left, dc->w.DCOrgY + top,
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right-left-1, bottom-top-1, 0, 360*64 );
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if (DC_SetupGCForPen( dc ))
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XDrawArc( XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + left, dc->w.DCOrgY + top,
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right-left-1, bottom-top-1, 0, 360*64 );
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return TRUE;
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}
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/***********************************************************************
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* Rectangle (GDI.27)
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*/
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BOOL Rectangle( HDC hdc, int left, int top, int right, int bottom )
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{
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return FALSE;
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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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if (DC_SetupGCForBrush( dc ))
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XFillRectangle( XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + left, dc->w.DCOrgY + top,
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right-left-1, bottom-top-1 );
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if (DC_SetupGCForPen( dc ))
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XDrawRectangle( XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + left, dc->w.DCOrgY + top,
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right-left-1, bottom-top-1 );
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return TRUE;
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}
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/***********************************************************************
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* FillRect (USER.81)
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*/
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int FillRect( HDC hdc, LPRECT rect, HBRUSH hbrush )
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{
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HBRUSH prevBrush;
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if ((rect->right <= rect->left) || (rect->bottom <= rect->top)) return 0;
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if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
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PatBlt( hdc, rect->left, rect->top,
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rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
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SelectObject( hdc, prevBrush );
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return 1;
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}
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/***********************************************************************
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* InvertRect (USER.82)
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*/
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void InvertRect( HDC hdc, LPRECT rect )
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{
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if ((rect->right <= rect->left) || (rect->bottom <= rect->top)) return;
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PatBlt( hdc, rect->left, rect->top,
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rect->right - rect->left, rect->bottom - rect->top, DSTINVERT );
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}
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/***********************************************************************
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* FrameRect (USER.83)
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*/
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int FrameRect( HDC hdc, LPRECT rect, HBRUSH hbrush )
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{
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HBRUSH prevBrush;
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int left, top, right, bottom;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return FALSE;
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if ((rect->right <= rect->left) || (rect->bottom <= rect->top)) return 0;
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if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
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left = XLPTODP( dc, rect->left );
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top = YLPTODP( dc, rect->top );
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right = XLPTODP( dc, rect->right );
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bottom = YLPTODP( dc, rect->bottom );
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if (DC_SetupGCForBrush( dc )) {
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PatBlt( hdc, rect->left, rect->top, 1,
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rect->bottom - rect->top, PATCOPY );
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PatBlt( hdc, rect->right - 1, rect->top, 1,
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rect->bottom - rect->top, PATCOPY );
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PatBlt( hdc, rect->left, rect->top,
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rect->right - rect->left, 1, PATCOPY );
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PatBlt( hdc, rect->left, rect->bottom - 1,
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rect->right - rect->left, 1, PATCOPY );
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}
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SelectObject( hdc, prevBrush );
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return 1;
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}
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/***********************************************************************
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* SetPixel (GDI.31)
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*/
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COLORREF SetPixel( HDC hdc, short x, short y, COLORREF color )
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{
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int pixel;
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PALETTEENTRY entry;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return 0;
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x = dc->w.DCOrgX + XLPTODP( dc, x );
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y = dc->w.DCOrgY + YLPTODP( dc, y );
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pixel = GetNearestPaletteIndex( dc->w.hPalette, color );
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GetPaletteEntries( dc->w.hPalette, pixel, 1, &entry );
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XSetForeground( XT_display, dc->u.x.gc, pixel );
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XSetFunction( XT_display, dc->u.x.gc, GXcopy );
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XDrawPoint( XT_display, dc->u.x.drawable, dc->u.x.gc, x, y );
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return RGB( entry.peRed, entry.peGreen, entry.peBlue );
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}
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/***********************************************************************
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* GetPixel (GDI.83)
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*/
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COLORREF GetPixel( HDC hdc, short x, short y )
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{
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PALETTEENTRY entry;
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XImage * image;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return 0;
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x = dc->w.DCOrgX + XLPTODP( dc, x );
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y = dc->w.DCOrgY + YLPTODP( dc, y );
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if ((x < 0) || (y < 0)) return 0;
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if (!(dc->w.flags & DC_MEMORY))
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{
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XWindowAttributes win_attr;
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if (!XGetWindowAttributes( XT_display, dc->u.x.drawable, &win_attr ))
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return 0;
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if (win_attr.map_state != IsViewable) return 0;
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if ((x >= win_attr.width) || (y >= win_attr.height)) return 0;
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}
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image = XGetImage( XT_display, dc->u.x.drawable, x, y,
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1, 1, AllPlanes, ZPixmap );
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GetPaletteEntries( dc->w.hPalette, XGetPixel( image, 0, 0 ), 1, &entry );
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XDestroyImage( image );
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return RGB( entry.peRed, entry.peGreen, entry.peBlue );
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}
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/***********************************************************************
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* PaintRgn (GDI.43)
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*/
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BOOL PaintRgn( HDC hdc, HRGN hrgn )
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{
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RECT box;
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HRGN tmpVisRgn, prevVisRgn;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return FALSE;
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/* Modify visible region */
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prevVisRgn = SaveVisRgn( hdc );
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if (prevVisRgn)
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{
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if (!(tmpVisRgn = CreateRectRgn( 0, 0, 0, 0 )))
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{
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RestoreVisRgn( hdc );
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return FALSE;
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}
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CombineRgn( tmpVisRgn, prevVisRgn, hrgn, RGN_AND );
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SelectVisRgn( hdc, tmpVisRgn );
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DeleteObject( tmpVisRgn );
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}
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else SelectVisRgn( hdc, hrgn );
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/* Fill the region */
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GetClipBox( hdc, &box );
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if (DC_SetupGCForBrush( dc ))
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XFillRectangle( XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + box.left, dc->w.DCOrgY + box.top,
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box.right-box.left, box.bottom-box.top );
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/* Restore the visible region */
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if (prevVisRgn) RestoreVisRgn( hdc );
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else SelectVisRgn( hdc, 0 );
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return TRUE;
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}
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/***********************************************************************
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* FillRgn (GDI.40)
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*/
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BOOL FillRgn( HDC hdc, HRGN hrgn, HBRUSH hbrush )
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{
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BOOL retval;
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HBRUSH prevBrush = SelectObject( hdc, hbrush );
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if (!prevBrush) return FALSE;
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retval = PaintRgn( hdc, hrgn );
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SelectObject( hdc, prevBrush );
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return retval;
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}
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/***********************************************************************
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* DrawFocusRect (GDI.466)
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*/
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void DrawFocusRect( HDC hdc, LPRECT rc )
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{
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HPEN hPen, hOldPen;
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int oldDrawMode, oldBkMode;
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int left, top, right, bottom;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (!dc) return;
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left = XLPTODP( dc, rc->left );
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top = YLPTODP( dc, rc->top );
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right = XLPTODP( dc, rc->right );
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bottom = YLPTODP( dc, rc->bottom );
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hPen = CreatePen(PS_DOT, 1, GetSysColor(COLOR_WINDOWTEXT));
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hOldPen = (HPEN)SelectObject(hdc, (HANDLE)hPen);
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oldDrawMode = SetROP2(hdc, R2_XORPEN);
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oldBkMode = SetBkMode(hdc, TRANSPARENT);
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if (DC_SetupGCForPen( dc ))
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XDrawRectangle( XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + left, dc->w.DCOrgY + top,
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right-left-1, bottom-top-1 );
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SetBkMode(hdc, oldBkMode);
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SetROP2(hdc, oldDrawMode);
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SelectObject(hdc, (HANDLE)hOldPen);
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DeleteObject((HANDLE)hPen);
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}
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/**********************************************************************
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* Line (Not a MSWin Call)
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*/
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void Line(HDC hDC, int X1, int Y1, int X2, int Y2)
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{
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MoveTo(hDC, X1, Y1);
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LineTo(hDC, X2, Y2);
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}
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/**********************************************************************
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* DrawReliefRect (Not a MSWin Call)
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*/
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void DrawReliefRect(HDC hDC, RECT rect, int ThickNess, int Mode)
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{
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HPEN hWHITEPen;
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HPEN hDKGRAYPen;
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HPEN hOldPen;
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int OldColor;
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rect.right--; rect.bottom--;
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hDKGRAYPen = CreatePen(PS_SOLID, 1, 0x00808080L);
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hWHITEPen = GetStockObject(WHITE_PEN);
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hOldPen = SelectObject(hDC, hWHITEPen);
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while(ThickNess > 0) {
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if (Mode == 0)
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SelectObject(hDC, hWHITEPen);
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else
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SelectObject(hDC, hDKGRAYPen);
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Line(hDC, rect.left, rect.top, rect.right, rect.top);
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Line(hDC, rect.left, rect.top, rect.left, rect.bottom + 1);
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if (Mode == 0)
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SelectObject(hDC, hDKGRAYPen);
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else
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SelectObject(hDC, hWHITEPen);
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Line(hDC, rect.right, rect.bottom, rect.left, rect.bottom);
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Line(hDC, rect.right, rect.bottom, rect.right, rect.top - 1);
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InflateRect(&rect, -1, -1);
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ThickNess--;
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}
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SelectObject(hDC, hOldPen);
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DeleteObject(hDKGRAYPen);
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}
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/**********************************************************************
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* Polyline (GDI.37)
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*/
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BOOL Polyline (HDC hdc, LPPOINT pt, int count)
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{
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register int i;
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DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
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if (DC_SetupGCForPen( dc ))
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{
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for (i = 0; i < count-1; i ++)
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XDrawLine (XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + XLPTODP(dc, pt [i].x),
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dc->w.DCOrgY + YLPTODP(dc, pt [i].y),
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dc->w.DCOrgX + XLPTODP(dc, pt [i+1].x),
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dc->w.DCOrgY + YLPTODP(dc, pt [i+1].y));
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XDrawLine (XT_display, dc->u.x.drawable, dc->u.x.gc,
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dc->w.DCOrgX + XLPTODP(dc, pt [count-1].x),
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dc->w.DCOrgY + YLPTODP(dc, pt [count-1].y),
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dc->w.DCOrgX + XLPTODP(dc, pt [0].x),
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dc->w.DCOrgY + YLPTODP(dc, pt [0].y));
|
|
}
|
|
|
|
return (TRUE);
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* Polygon (GDI.36)
|
|
*/
|
|
BOOL Polygon (HDC hdc, LPPOINT pt, int count)
|
|
{
|
|
register int i;
|
|
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
|
|
XPoint *points = (XPoint *) malloc (sizeof (XPoint) * count+1);
|
|
|
|
if (DC_SetupGCForBrush( dc ))
|
|
{
|
|
|
|
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];
|
|
|
|
XFillPolygon( XT_display, dc->u.x.drawable, dc->u.x.gc,
|
|
points, count, Complex, CoordModeOrigin);
|
|
|
|
if (DC_SetupGCForPen ( dc ))
|
|
{
|
|
XDrawLines( XT_display, dc->u.x.drawable, dc->u.x.gc,
|
|
points, count, CoordModeOrigin );
|
|
}
|
|
}
|
|
free ((void *) points);
|
|
return (TRUE);
|
|
}
|
|
|
|
|