/* === S Y N F I G ========================================================= */
/*! \file radialblur.cpp
-** \brief Template Header
+** \brief Implementation of the "Radial Blur" layer
+**
+** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007, 2008 Chris Moore
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
SYNFIG_LAYER_INIT(RadialBlur);
SYNFIG_LAYER_SET_NAME(RadialBlur,"radial_blur");
-SYNFIG_LAYER_SET_LOCAL_NAME(RadialBlur,_("Radial Blur"));
-SYNFIG_LAYER_SET_CATEGORY(RadialBlur,_("Blurs"));
+SYNFIG_LAYER_SET_LOCAL_NAME(RadialBlur,N_("Radial Blur"));
+SYNFIG_LAYER_SET_CATEGORY(RadialBlur,N_("Blurs"));
SYNFIG_LAYER_SET_VERSION(RadialBlur,"0.1");
SYNFIG_LAYER_SET_CVS_ID(RadialBlur,"$Id$");
bool
RadialBlur::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
{
+ // don't do anything at quality 10
+ if (quality == 10)
+ return context.accelerated_render(surface,quality,renddesc,cb);
+
if(cb && !cb->amount_complete(0,10000))
return false;
Surface tmp_surface;
+ const Point tl(renddesc.get_tl()), br(renddesc.get_br());
+ const int w(renddesc.get_w()), h(renddesc.get_h());
+ const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
- if(!context.accelerated_render(surface,quality,renddesc,cb))
- return false;
-
- tmp_surface=*surface;
+ Rect rect(tl, br);
+ Point pos;
- int x,y;
+ // find how far towards the origin of the blur we are going to
+ // wander for each of the 4 corners of our tile, expanding the
+ // render description for each of them if necessary
+ int x, y;
+ for(y=0,pos[1]=tl[1];y<h;y+=(h-1),pos[1]+=ph*(h-1))
+ for(x=0,pos[0]=tl[0];x<w;x+=(w-1),pos[0]+=pw*(w-1))
+ rect.expand((pos-origin)*(1.0f-size) + origin);
+
+ // round out to the nearest pixel
+ Point tmp_surface_tl = Point(tl[0] - pw*(int((tl[0]-rect.get_min()[0])/pw+1-1e-6)),
+ tl[1] - ph*(int((tl[1]-rect.get_max()[1])/ph+1-1e-6)));
+ Point tmp_surface_br = Point(br[0] + pw*(int((rect.get_max()[0]-br[0])/pw+2-1e-6)),
+ br[1] + ph*(int((rect.get_min()[1]-br[1])/ph+2-1e-6)));
+
+ // round to nearest integer width and height (should be very
+ // nearly whole numbers already, but don't want to round 5.99999
+ // down to 5)
+ int tmp_surface_width = int((tmp_surface_br[0]-tmp_surface_tl[0])/pw + 0.5);
+ int tmp_surface_height = int((tmp_surface_br[1]-tmp_surface_tl[1])/ph + 0.5);
+
+ RendDesc desc(renddesc);
+ desc.clear_flags();
+ desc.set_wh(tmp_surface_width,tmp_surface_height);
+ desc.set_tl(tmp_surface_tl);
+ desc.set_br(tmp_surface_br);
+
+ // render the layers beneath us
+ if(!context.accelerated_render(&tmp_surface,quality,desc,cb))
+ return false;
- const Point tl(renddesc.get_tl());
- Point pos;
- const int w(surface->get_w());
- const int h(surface->get_h());
- const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
+ // copy the part of the layers beneath us that corresponds to this tile
+ surface->set_wh(w, h);
+ Surface::pen pen(surface->get_pen(0, 0));
+ tmp_surface.blit_to(pen,
+ int((tl[0] - tmp_surface_tl[0])/pw + 0.5),
+ int((tl[1] - tmp_surface_tl[1])/ph + 0.5),
+ w, h);
Surface::alpha_pen apen(surface->begin());
apen.set_alpha(get_amount());
apen.set_blend_method(get_blend_method());
+/*
int steps(5);
if(quality>=9)steps=20;
else if(quality>=4)steps=60;
else if(quality>=3)steps=100;
else steps=120;
+*/
Surface::value_prep_type cooker;
+ // loop through the pixels
for(y=0,pos[1]=tl[1];y<h;y++,apen.inc_y(),apen.dec_x(x),pos[1]+=ph)
for(x=0,pos[0]=tl[0];x<w;x++,apen.inc_x(),pos[0]+=pw)
{
Point
- begin(pos-tl),
- end((pos-origin)*(1.0f-size)+origin-tl);
+ begin(pos-tmp_surface_tl),
+ end((pos-origin)*(1.0f-size) + origin-tmp_surface_tl);
begin[0]/=pw;begin[1]/=ph;
end[0]/=pw;end[1]/=ph;
int sx, sy; /* step positive or negative (1 or -1) */
int dx, dy; /* delta (difference in X and Y between points) */
int e;
- int w(tmp_surface.get_w()),h(tmp_surface.get_h());
+ int w(tmp_surface_width), h(tmp_surface_height);
dx = abs(x1 - x0);
sx = ((x1 - x0) > 0) ? 1 : -1;
pool+=cooker.cook(tmp_surface[x0][y0]);
poolsize+=1;
}
- }
+ } else
+ printf("%s:%d unexpected %d >= %d or %d >= %d?\n", __FILE__, __LINE__, x0, w, y0, h);
while (e >= 0)
{
if(cb && !cb->amount_complete(10000,10000)) return false;
+// #define DRAW_TILE_OUTLINES
+#ifdef DRAW_TILE_OUTLINES
+ // draw red lines to show tiles
+ {
+ int x, y;
+ if (w != 0 && h != 0) {
+ Surface::alpha_pen apen(surface->begin());
+ apen.set_alpha(get_amount());
+ apen.set_blend_method(get_blend_method());
+ apen.set_value(Color(1, 0, 0, .1));
+ for (x = 0; x < w; x++) { apen.put_value(); apen.inc_x(); } apen.dec_x(w);
+ for (y = 0; y < h; y++) { apen.put_value(); apen.inc_y(); } apen.dec_y(h);
+ }
+ }
+#endif // DRAW_TILE_OUTLINES
+
return true;
}
projects / synfig.git / blobdiff