#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)); // CAIRO FIXME: for cairo output we need 32bpp, so it will be 4 * ... } } } 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) { gint const o_a = sp_canvas_item_order (a); gint const 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; } /* Local Variables: mode:c++ c-file-style:"stroustrup" c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) indent-tabs-mode:nil fill-column:99 End: */ // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :