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-rw-r--r--src/display/sp-canvas-util.cpp307
1 files changed, 307 insertions, 0 deletions
diff --git a/src/display/sp-canvas-util.cpp b/src/display/sp-canvas-util.cpp
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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;
+}
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