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#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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