Add more primitives to Cairo drawing backend

2 files changed, 255 insertions, 43 deletions

diff --git a/tdegtk/tqtcairopainter.cpp b/tdegtk/tqtcairopainter.cpp
index ae440b7..8f917e1 100644
--- a/tdegtk/tqtcairopainter.cpp
+++ b/tdegtk/tqtcairopainter.cpp
@@ -99,16 +99,16 @@ void TQt3CairoPaintDevice::dualStrokePen() {
 	cairo_stroke(m_painter);
 }
 
-void TQt3CairoPaintDevice::dualStrokeBrush() {
+void TQt3CairoPaintDevice::dualStrokeBrush(cairo_fill_rule_t fillMethod) {
 	if (m_bgColorMode == TQt::OpaqueMode) {
 		// Draw background
 		cairo_save(m_painter);
-		updateBrush(TRUE);
+		updateBrush(TRUE, fillMethod);
 		cairo_fill(m_painter);
 		cairo_restore(m_painter);
 	}
 	// Draw foreground
-	updateBrush(FALSE);
+	updateBrush(FALSE, fillMethod);
 	cairo_fill(m_painter);
 }
 
@@ -222,7 +222,7 @@ void TQt3CairoPaintDevice::updatePen(bool backgroundStroke) {
 	cairo_set_source_rgba(m_painter, tqRed(color), tqGreen(color), tqBlue(color), tqAlpha(color));
 }
 
-void TQt3CairoPaintDevice::updateBrush(bool backgroundStroke) {
+void TQt3CairoPaintDevice::updateBrush(bool backgroundStroke, cairo_fill_rule_t fillMethod) {
 	if (!m_painter) {
 		return;
 	}
@@ -338,6 +338,203 @@ void TQt3CairoPaintDevice::updateBrush(bool backgroundStroke) {
 			cairo_pattern_destroy(pattern);
 		}
 	}
+	cairo_set_fill_rule(m_painter, fillMethod);
+}
+
+static inline void fix_neg_rect( int *x, int *y, int *w, int *h ) {
+	if ( *w < 0 ) {
+		*w = -*w + 2;
+		*x -= *w - 1;
+	}
+	if ( *h < 0 ) {
+		*h = -*h + 2;
+		*y -= *h - 1;
+	}
+}
+
+void TQt3CairoPaintDevice::drawPolygon(const TQPointArray* pointarray, bool winding, bool fill, bool close) {
+	int i;
+
+	if (m_painter) {
+		cairo_save(m_painter);
+		if (pointarray) {
+			int x;
+			int y;
+			bool first;
+			if ((m_brush.style() != TQBrush::NoBrush) && fill) {
+				first = true;
+				for (i=0;i<pointarray->count();i++) {
+					pointarray->point(i, &x, &y );
+					if (first) {
+						cairo_move_to(m_painter, x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET);
+						first = false;
+					}
+					else {
+						cairo_line_to(m_painter, x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET);
+					}
+				}
+				if (close) {
+					cairo_close_path(m_painter);
+				}
+				dualStrokeBrush((winding)?CAIRO_FILL_RULE_EVEN_ODD:CAIRO_FILL_RULE_WINDING);
+			}
+			if (m_pen.style() != TQPen::NoPen) {
+				first = true;
+				for (i=0;i<pointarray->count();i++) {
+					pointarray->point(i, &x, &y );
+					if (first) {
+						cairo_move_to(m_painter, x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET);
+						first = false;
+					}
+					else {
+						cairo_line_to(m_painter, x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET);
+					}
+				}
+				if (close) {
+					cairo_close_path(m_painter);
+				}
+				dualStrokePen();
+			}
+		}
+		cairo_restore(m_painter);
+	}
+}
+
+void TQt3CairoPaintDevice::drawRoundRect(int x, int y, int w, int h, int xRnd, int yRnd) {
+	if (!m_painter) {
+		return;
+	}
+
+	if ( xRnd <= 0 || yRnd <= 0 ) {
+		// Draw normal rectangle
+		TQPDevCmdParam param[2];
+		int command = PdcDrawRect;
+		TQRect rectangle(x, y, w, h);
+		param[0].rect = &rectangle;
+		cmd(command, NULL, param);
+		return;
+	}
+
+	if ( xRnd >= 100 ) {                          // fix ranges
+		xRnd = 99;
+	}
+	if ( yRnd >= 100 ) {
+		yRnd = 99;
+	}
+
+	if ( w <= 0 || h <= 0 ) {
+	fix_neg_rect( &x, &y, &w, &h );
+	}
+	w--;
+	h--;
+	int rxx = w*xRnd/200;
+	int ryy = h*yRnd/200;
+	// were there overflows?
+	if ( rxx < 0 ) {
+		rxx = w/200*xRnd;
+	}
+	if ( ryy < 0 ) {
+		ryy = h/200*yRnd;
+	}
+	int rxx2 = 2*rxx;
+	int ryy2 = 2*ryy;
+	TQPointArray a[4];
+	a[0].makeArc( x, y, rxx2, ryy2, 1*16*90, 16*90 );
+	a[1].makeArc( x, y+h-ryy2, rxx2, ryy2, 2*16*90, 16*90 );
+	a[2].makeArc( x+w-rxx2, y+h-ryy2, rxx2, ryy2, 3*16*90, 16*90 );
+	a[3].makeArc( x+w-rxx2, y, rxx2, ryy2, 0*16*90, 16*90 );
+	// ### is there a better way to join TQPointArrays?
+	TQPointArray aa;
+	aa.resize( a[0].size() + a[1].size() + a[2].size() + a[3].size() );
+	uint j = 0;
+	for ( int k=0; k<4; k++ ) {
+		for ( uint i=0; i<a[k].size(); i++ ) {
+			aa.setPoint( j, a[k].point(i) );
+			j++;
+		}
+	}
+
+	// Draw polygon
+	drawPolygon(&aa, false, true, true);
+
+	return;
+}
+
+void TQt3CairoPaintDevice::drawEllipse(int x, int y, int w, int h) {
+	if (!m_painter) {
+		return;
+	}
+
+	TQPointArray a;
+	a.makeArc(x, y, w, h, 0, 360*16);
+
+	// Draw polygon
+	drawPolygon(&a, false, true, true);
+
+	return;
+}
+
+void TQt3CairoPaintDevice::drawArc(int x, int y, int w, int h, int a, int alen) {
+	if (!m_painter) {
+		return;
+	}
+
+	TQPointArray pa;
+	pa.makeArc(x, y, w, h, a, alen); // arc polyline
+
+	// Draw polygon
+	drawPolygon(&pa, false, false, false);
+
+	return;
+}
+
+void TQt3CairoPaintDevice::drawPie(int x, int y, int w, int h, int a, int alen) {
+	if (!m_painter) {
+		return;
+	}
+
+	// Make sure "a" is 0..360*16, as otherwise a*4 may overflow 16 bits.
+	if ( a > (360*16) ) {
+		a = a % (360*16);
+	}
+	else if ( a < 0 ) {
+		a = a % (360*16);
+		if ( a < 0 ) {
+			a += (360*16);
+		}
+	}
+
+	TQPointArray pa;
+	pa.makeArc(x, y, w, h, a, alen); // arc polyline
+	int n = pa.size();
+	int cx, cy;
+	cx = x+w/2;
+	cy = y+h/2;
+	pa.resize(n+2);
+	pa.setPoint(n, cx, cy);   // add legs
+	pa.setPoint(n+1, pa.at(0));
+
+	// Draw polygon
+	drawPolygon(&pa, false, true, true);
+
+	return;
+}
+
+void TQt3CairoPaintDevice::drawChord(int x, int y, int w, int h, int a, int alen) {
+	if (!m_painter) {
+		return;
+	}
+
+	TQPointArray pa;
+	pa.makeArc(x, y, w-1, h-1, a, alen); // arc polygon
+	int n = pa.size();
+	pa.resize(n+1);
+	pa.setPoint(n, pa.at(0));         // connect endpoints
+
+	// Draw polygon
+	drawPolygon(&pa, false, true, true);
+
+	return;
 }
 
 /*!
@@ -478,7 +675,7 @@ bool TQt3CairoPaintDevice::cmd( int c, TQPainter *pt, TQPDevCmdParam *p )
 			if (m_brush.style() != TQBrush::NoBrush) {
 				int line_width = m_pen.width();
 				cairo_rectangle(m_painter, x+line_width+CAIRO_PIXEL_OFFSET, y+line_width+CAIRO_PIXEL_OFFSET, width-(line_width*2), height-(line_width*2));
-				dualStrokeBrush();
+				dualStrokeBrush(CAIRO_FILL_RULE_EVEN_ODD);
 			}
 			cairo_restore(m_painter);
 		}
@@ -488,22 +685,52 @@ bool TQt3CairoPaintDevice::cmd( int c, TQPainter *pt, TQPDevCmdParam *p )
 #endif
 		}
 		break;
-#if 0
 	    case PdcDrawRoundRect:
-		m_qt4painter->drawRoundedRect( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter), p[1].ival, p[2].ival );
+		if (m_painter) {
+			cairo_save(m_painter);
+			if (p) {
+				drawRoundRect(x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET, width, height, p[1].ival, p[2].ival);
+			}
+			cairo_restore(m_painter);
+		}
 		break;
 	    case PdcDrawEllipse:
-		m_qt4painter->drawEllipse( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter) );
+		if (m_painter) {
+			cairo_save(m_painter);
+			if (p) {
+				drawEllipse(x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET, width, height);
+			}
+			cairo_restore(m_painter);
+		}
 		break;
 	    case PdcDrawArc:
-		m_qt4painter->drawArc( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter), p[1].ival, p[2].ival );
+		if (m_painter) {
+			cairo_save(m_painter);
+			if (p) {
+				drawArc(x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET, width, height, p[1].ival, p[2].ival);
+			}
+			cairo_restore(m_painter);
+		}
 		break;
 	    case PdcDrawPie:
-		m_qt4painter->drawPie( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter), p[1].ival, p[2].ival );
+		if (m_painter) {
+			cairo_save(m_painter);
+			if (p) {
+				drawPie(x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET, width, height, p[1].ival, p[2].ival);
+			}
+			cairo_restore(m_painter);
+		}
 		break;
 	    case PdcDrawChord:
-		m_qt4painter->drawChord( qt4PainterAdjustedRectangle(qt4rect, m_qt4painter), p[1].ival, p[2].ival );
+		if (m_painter) {
+			cairo_save(m_painter);
+			if (p) {
+				drawChord(x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET, width, height, p[1].ival, p[2].ival);
+			}
+			cairo_restore(m_painter);
+		}
 		break;
+#if 0
 	    case PdcDrawLineSegments:
 		index = 0;
 		count = -1;
@@ -512,36 +739,16 @@ bool TQt3CairoPaintDevice::cmd( int c, TQPainter *pt, TQPDevCmdParam *p )
 		break;
 #endif
 	    case PdcDrawPolyline:
-		if (m_painter) {
-			cairo_save(m_painter);
-			if (p) {
-				const TQPointArray* pointarray = p[0].ptarr;
-				if (pointarray) {
-					int x;
-					int y;
-					bool first=true;
-					for (i=0;i<pointarray->count();i++) {
-						pointarray->point(i, &x, &y );
-						if (first) {
-							cairo_move_to(m_painter, x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET);
-							first = false;
-						}
-						else {
-							cairo_line_to(m_painter, x+CAIRO_PIXEL_OFFSET, y+CAIRO_PIXEL_OFFSET);
-						}
-					}
-					if (m_pen.style() != TQPen::NoPen) {
-						dualStrokePen();
-					}
-				}
-			}
-			cairo_restore(m_painter);
+		if (p) {
+			drawPolygon(p[0].ptarr, false, false, true);
 		}
 		break;
-#if 0
 	    case PdcDrawPolygon:
-		m_qt4painter->drawPolygon( qt4polygon, (p[1].ival == 0)?Qt::OddEvenFill:Qt::WindingFill );
+		if (p) {
+			drawPolygon(p[0].ptarr, p[1].ival, true, true);
+		}
 		break;
+#if 0
 	    case PdcDrawCubicBezier:
 		index = 0;
 		path.moveTo(qt4polygon.at(index));
@@ -592,14 +799,12 @@ bool TQt3CairoPaintDevice::cmd( int c, TQPainter *pt, TQPDevCmdParam *p )
 			m_painter = NULL;
 		}
 		break;
-#if 0
 	    case PdcSave:
-		m_qt4painter->save();
+		cairo_save(m_painter);
 		break;
 	    case PdcRestore:
-		m_qt4painter->restore();
+		cairo_restore(m_painter);
 		break;
-#endif
 	    case PdcSetBkColor:
 		if (p) {
 			const TQColor* color = p[0].color;
diff --git a/tdegtk/tqtcairopainter.h b/tdegtk/tqtcairopainter.h
index fa051c2..7e43468 100644
--- a/tdegtk/tqtcairopainter.h
+++ b/tdegtk/tqtcairopainter.h
@@ -44,8 +44,15 @@ class Q_EXPORT TQt3CairoPaintDevice : public TQPaintDevice		// picture class
 		void updatePen(bool backgroundStroke=FALSE);
 		void dualStrokePen();
 
-		void updateBrush(bool backgroundStroke=FALSE);
-		void dualStrokeBrush();
+		void updateBrush(bool backgroundStroke=FALSE, cairo_fill_rule_t fillMethod=CAIRO_FILL_RULE_WINDING);
+		void dualStrokeBrush(cairo_fill_rule_t fillMethod=CAIRO_FILL_RULE_WINDING);
+
+		void drawPolygon(const TQPointArray* pointarray, bool winding, bool fill, bool close);
+		void drawRoundRect(int x, int y, int w, int h, int xRnd, int yRnd);
+		void drawEllipse(int x, int y, int w, int h);
+		void drawArc(int x, int y, int w, int h, int a, int alen);
+		void drawPie(int x, int y, int w, int h, int a, int alen);
+		void drawChord(int x, int y, int w, int h, int a, int alen);
 	
 	private:
 		cairo_surface_t *m_surface;