moving trunk for module inkscape

(bzr r1)

1 files changed, 307 insertions, 0 deletions

diff --git a/src/display/sp-canvas-util.cpp b/src/display/sp-canvas-util.cpp
new file mode 100644
index 000000000..e4f2c7b75
--- /dev/null
+++ b/src/display/sp-canvas-util.cpp
@@ -0,0 +1,307 @@
+#define __SP_CANVAS_UTILS_C__
+
+/*
+ * Helper stuff for SPCanvas
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * Copyright (C) 1999-2002 authors
+ * Copyright (C) 2001-2002 Ximian, Inc.
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+
+#include "libnr/nr-matrix-div.h"
+#include "libnr/nr-pixops.h"
+#include "sp-canvas-util.h"
+
+#include <livarot/Shape.h>
+#include <livarot/int-line.h>
+#include <livarot/BitLigne.h>
+
+void
+sp_canvas_update_bbox (SPCanvasItem *item, int x1, int y1, int x2, int y2)
+{
+	sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
+	item->x1 = x1;
+	item->y1 = y1;
+	item->x2 = x2;
+	item->y2 = y2;
+	sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
+}
+
+void
+sp_canvas_item_reset_bounds (SPCanvasItem *item)
+{
+	item->x1 = 0.0;
+	item->y1 = 0.0;
+	item->x2 = 0.0;
+	item->y2 = 0.0;
+}
+
+void
+sp_canvas_prepare_buffer (SPCanvasBuf *buf)
+{
+	if (buf->is_empty) {
+		sp_canvas_clear_buffer(buf);
+		buf->is_empty = false;
+	}
+}
+
+void
+sp_canvas_clear_buffer (SPCanvasBuf *buf)
+{
+	unsigned char r, g, b;
+
+	r = (buf->bg_color >> 16) & 0xff;
+	g = (buf->bg_color >> 8) & 0xff;
+	b = buf->bg_color & 0xff;
+
+	if ((r != g) || (r != b)) {
+		int x, y;
+		for (y = buf->rect.y0; y < buf->rect.y1; y++) {
+			unsigned char *p;
+			p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride;
+			for (x = buf->rect.x0; x < buf->rect.x1; x++) {
+				*p++ = r;
+				*p++ = g;
+				*p++ = b;
+			}
+		}
+	} else {
+		int y;
+		for (y = buf->rect.y0; y < buf->rect.y1; y++) {
+			memset (buf->buf + (y - buf->rect.y0) * buf->buf_rowstride, r, 3 * (buf->rect.x1 - buf->rect.x0));
+		}
+	}
+}
+
+NR::Matrix sp_canvas_item_i2p_affine (SPCanvasItem * item)
+{
+	g_assert (item != NULL); // this may be overly zealous - it is
+				 // plausible that this gets called
+				 // with item == 0
+	
+	return item->xform;
+}
+
+NR::Matrix  sp_canvas_item_i2i_affine (SPCanvasItem * from, SPCanvasItem * to)
+{
+	g_assert (from != NULL);
+	g_assert (to != NULL);
+
+	return sp_canvas_item_i2w_affine(from) / sp_canvas_item_i2w_affine(to);
+}
+
+void sp_canvas_item_set_i2w_affine (SPCanvasItem * item,  NR::Matrix const &i2w)
+{
+	g_assert (item != NULL);
+
+	sp_canvas_item_affine_absolute(item, i2w / sp_canvas_item_i2w_affine(item->parent));
+}
+
+void sp_canvas_item_move_to_z (SPCanvasItem * item, gint z)
+{
+	g_assert (item != NULL);
+
+	gint current_z = sp_canvas_item_order (item);
+
+	if (current_z == -1) // not found in its parent
+		return;
+
+	if (z == current_z)
+		return;
+
+	if (z > current_z)
+		sp_canvas_item_raise (item, z - current_z);
+
+	sp_canvas_item_lower (item, current_z - z);
+}
+
+gint
+sp_canvas_item_compare_z (SPCanvasItem * a, SPCanvasItem * b)
+{
+	const gint o_a = sp_canvas_item_order (a);
+	const gint o_b = sp_canvas_item_order (b);
+
+	if (o_a > o_b) return -1;
+	if (o_a < o_b) return 1;
+
+	return 0;
+}
+
+// These two functions are used by canvasitems that use livarot (currently ctrlline and ctrlquadr)
+
+void
+ctrl_run_A8_OR (raster_info &dest,void *data,int st,float vst,int en,float ven)
+{
+    union {
+        uint8_t  comp[4];
+        uint32_t col;
+    } tempCol;
+    if ( st >= en ) return;
+    tempCol.col=*(uint32_t*)data;
+  
+    unsigned int r, g, b, a;
+    r = NR_RGBA32_R (tempCol.col);
+    g = NR_RGBA32_G (tempCol.col);
+    b = NR_RGBA32_B (tempCol.col);
+    a = NR_RGBA32_A (tempCol.col);
+    if (a == 0) return;
+  
+    vst*=a;
+    ven*=a;
+  
+    if ( vst < 0 ) vst=0;
+    if ( vst > 255 ) vst=255;
+    if ( ven < 0 ) ven=0;
+    if ( ven > 255 ) ven=255;
+    float      sv=vst;
+    float      dv=ven-vst;
+    int        len=en-st;
+    uint8_t*   d=(uint8_t*)dest.buffer;
+  
+    d+=3*(st-dest.startPix);
+    if ( fabs(dv) < 0.001 ) {
+        if ( sv > 249.999 ) {
+            /* Simple copy */
+            while (len > 0) {
+                d[0] = INK_COMPOSE (r, 255, d[0]);
+                d[1] = INK_COMPOSE (g, 255, d[1]);
+                d[2] = INK_COMPOSE (b, 255, d[2]);
+                d += 3;
+                len -= 1;
+            }
+        } else {
+            unsigned int c0_24=(int)sv;
+            c0_24&=0xFF;
+            while (len > 0) {
+                d[0] = INK_COMPOSE (r, c0_24, d[0]);
+                d[1] = INK_COMPOSE (g, c0_24, d[1]);
+                d[2] = INK_COMPOSE (b, c0_24, d[2]);
+                d += 3;
+                len -= 1;
+            }
+        }
+    } else {
+        if ( en <= st+1 ) {
+            sv=0.5*(vst+ven);
+            unsigned int c0_24=(int)sv;
+            c0_24&=0xFF;
+            d[0] = INK_COMPOSE (r, c0_24, d[0]);
+            d[1] = INK_COMPOSE (g, c0_24, d[1]);
+            d[2] = INK_COMPOSE (b, c0_24, d[2]);
+        } else {
+            dv/=len;
+            sv+=0.5*dv; // correction trapezoidale
+            sv*=65536;
+            dv*=65536;
+            int c0_24 = static_cast<int>(CLAMP(sv, 0, 16777216));
+            int s0_24 = static_cast<int>(dv);
+            while (len > 0) {
+                unsigned int ca;
+                /* Draw */
+                ca = c0_24 >> 16;
+                if ( ca > 255 ) ca=255;
+                d[0] = INK_COMPOSE (r, ca, d[0]);
+                d[1] = INK_COMPOSE (g, ca, d[1]);
+                d[2] = INK_COMPOSE (b, ca, d[2]);
+                d += 3;
+                c0_24 += s0_24;
+                c0_24 = CLAMP (c0_24, 0, 16777216);
+                len -= 1;
+            }
+        }
+    }
+}
+
+void nr_pixblock_render_ctrl_rgba (Shape* theS,uint32_t color,NRRectL &area,char* destBuf,int stride)
+{
+  
+    theS->CalcBBox();
+    float  l=theS->leftX,r=theS->rightX,t=theS->topY,b=theS->bottomY;
+    int    il,ir,it,ib;
+    il=(int)floor(l);
+    ir=(int)ceil(r);
+    it=(int)floor(t);
+    ib=(int)ceil(b);
+  
+//  printf("bbox %i %i %i %i  render %i %i %i %i\n",il,it,ir,ib,area.x0,area.y0,area.x1,area.y1);
+  
+    if ( il >= area.x1 || ir <= area.x0 || it >= area.y1 || ib <= area.y0 ) return;
+    if ( il < area.x0 ) il=area.x0;
+    if ( it < area.y0 ) it=area.y0;
+    if ( ir > area.x1 ) ir=area.x1;
+    if ( ib > area.y1 ) ib=area.y1;
+  
+/*  // version par FloatLigne
+    int    curPt;
+    float  curY;
+    theS->BeginRaster(curY,curPt,1.0);
+  
+    FloatLigne* theI=new FloatLigne();
+    IntLigne*   theIL=new IntLigne();
+  
+    theS->Scan(curY,curPt,(float)(it),1.0);
+  
+    char* mdata=(char*)destBuf;
+    uint32_t* ligStart=((uint32_t*)(mdata+(3*(il-area.x0)+stride*(it-area.y0))));
+    for (int y=it;y<ib;y++) {
+    theI->Reset();
+    if ( y&0x00000003 ) {
+    theS->Scan(curY,curPt,((float)(y+1)),theI,false,1.0);
+    } else {
+    theS->Scan(curY,curPt,((float)(y+1)),theI,true,1.0);
+    }
+    theI->Flatten();
+    theIL->Copy(theI);
+    
+    raster_info  dest;
+    dest.startPix=il;
+    dest.endPix=ir;
+    dest.sth=il;
+    dest.stv=y;
+    dest.buffer=ligStart;
+    theIL->Raster(dest,&color,bpath_run_A8_OR);
+    ligStart=((uint32_t*)(((char*)ligStart)+stride));
+    }
+    theS->EndRaster();
+    delete theI;
+    delete theIL;  */
+  
+    // version par BitLigne directe
+    int    curPt;
+    float  curY;
+    theS->BeginQuickRaster(curY, curPt);
+  
+    BitLigne*   theI[4];
+    for (int i=0;i<4;i++) theI[i]=new BitLigne(il,ir);
+    IntLigne*   theIL=new IntLigne();
+  
+    theS->QuickScan(curY,curPt,(float)(it),true,0.25);
+  
+    char* mdata=(char*)destBuf;
+    uint32_t* ligStart=((uint32_t*)(mdata+(3*(il-area.x0)+stride*(it-area.y0))));
+    for (int y=it;y<ib;y++) {
+        for (int i=0;i<4;i++) theI[i]->Reset();
+        theS->QuickScan(curY,curPt,((float)(y+0.25)),fill_oddEven,theI[0],0.25);
+        theS->QuickScan(curY,curPt,((float)(y+0.5)),fill_oddEven,theI[1],0.25);
+        theS->QuickScan(curY,curPt,((float)(y+0.75)),fill_oddEven,theI[2],0.25);
+        theS->QuickScan(curY,curPt,((float)(y+1.0)),fill_oddEven,theI[3],0.25);
+        theIL->Copy(4,theI);
+    
+        raster_info  dest;
+        dest.startPix=il;
+        dest.endPix=ir;
+        dest.sth=il;
+        dest.stv=y;
+        dest.buffer=ligStart;
+        theIL->Raster(dest,&color,ctrl_run_A8_OR);
+        ligStart=((uint32_t*)(((char*)ligStart)+stride));
+    }
+    theS->EndQuickRaster();
+    for (int i=0;i<4;i++) delete theI[i];
+    delete theIL;    
+}