**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 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
#include "context.h"
#include "layer.h"
+#include "layer_composite.h"
#include "string.h"
#include "vector.h"
#include "color.h"
const Rect bbox(renddesc.get_rect());
+ // this is going to be set to true if this layer contributes
+ // nothing, but it's a straight blend with non-zero amount, and so
+ // it has an effect anyway
+ bool straight_and_empty = false;
+ etl::handle<Layer_Composite> composite;
Context context(*this);
+
for(;!(context)->empty();++context)
{
- // If we are not active
- // then move on to next layer
+ // If we are not active then move on to next layer
if(!(*context)->active())
continue;
const Rect layer_bounds((*context)->get_bounding_rect());
-
- // If the box area is less than zero
- // then move on to next layer
- if(layer_bounds.area()<=0.0000000000001)
- continue;
-
- // If the boxes do not intersect
- // then move on to next layer
- if(!(layer_bounds && bbox))
+ composite = etl::handle<Layer_Composite>::cast_dynamic(*context);
+
+ // If the box area is less than zero or the boxes do not
+ // intersect then move on to next layer, unless the layer is
+ // using a straight blend and has a non-zero amount, in which
+ // case it will still affect the result
+ if(layer_bounds.area() <= 0.0000000000001 || !(layer_bounds && bbox))
+ {
+ if (composite &&
+ Color::is_straight(composite->get_blend_method()) &&
+ composite->get_amount() != 0.0f)
+ {
+ straight_and_empty = true;
+ break;
+ }
continue;
+ }
+
+ // If this layer has Straight as the blend method and amount
+ // is 1.0, and the layer doesn't depend on its context, then
+ // we don't want to render the context
+ if (composite &&
+ composite->get_blend_method() == Color::BLEND_STRAIGHT &&
+ composite->get_amount() == 1.0f &&
+ !composite->reads_context())
+ {
+ Layer::Handle layer = *context;
+ while (!context->empty()) context++; // skip the context
+ return layer->accelerated_render(context,surface,quality,renddesc, cb);
+ }
// Break out of the loop--we have found a good layer
break;
}
// If this layer isn't defined, return alpha
- if((context)->empty())
+ if (context->empty() || (straight_and_empty && composite->get_amount() == 1.0f))
{
#ifdef SYNFIG_DEBUG_LAYERS
synfig::info("Context::accelerated_render(): Hit end of list");
depth++;
curr_layer=(*context)->get_name(); //make sure the layer inside is referring to the correct layer outside
profile_timer.reset(); // +
- bool ret((*context)->accelerated_render(context+1,surface,quality,renddesc, cb));
+#endif // SYNFIG_PROFILE_LAYERS
+
+ bool ret;
+ // this layer doesn't draw anything onto the canvas we're
+ // rendering, but it uses straight blending, so we need to render
+ // the stuff under us and then blit transparent pixels over it
+ // using the appropriate 'amount'
+ if (straight_and_empty)
+ {
+ if ((ret = Context((context+1)).accelerated_render(surface,quality,renddesc,cb)))
+ {
+ Surface clearsurface;
+ clearsurface.set_wh(renddesc.get_w(),renddesc.get_h());
+ clearsurface.clear();
+
+ Surface::alpha_pen apen(surface->begin());
+ apen.set_alpha(composite->get_amount());
+ apen.set_blend_method(composite->get_blend_method());
+
+ clearsurface.blit_to(apen);
+ }
+ }
+ else
+ ret = (*context)->accelerated_render(context+1,surface,quality,renddesc, cb);
+
+#ifdef SYNFIG_PROFILE_LAYERS
//post work for the previous layer
time_table[curr_layer]+=profile_timer(); //-
if(run_table.count(curr_layer))run_table[curr_layer]++;
//print out the table it we're done...
if(depth==0) _print_profile_report(),time_table.clear(),run_table.clear();
profile_timer.reset(); //+
- return ret;
-#else // SYNFIG_PROFILE_LAYERS
- return (*context)->accelerated_render(context+1,surface,quality,renddesc, cb);
#endif // SYNFIG_PROFILE_LAYERS
+ return ret;
}
catch(std::bad_alloc)
{
Context context(*this);
while(!(context)->empty())
{
- // If this layer is active, then go
- // ahead and break out of the loop
- if((*context)->active() && !(*context)->dirty_time_.is_equal(time))
+ // If this layer is active, and
+ // it either isn't already set to the given time or
+ // it's a time loop layer,
+ // then break out of the loop and set its time
+ if((*context)->active() &&
+ (!(*context)->dirty_time_.is_equal(time) ||
+ (*context)->get_name() == "timeloop"))
break;
// Otherwise, we want to keep searching
projects / synfig.git / blobdiff