From 1115320cfac30914e84615d43d79a0055e238c7b Mon Sep 17 00:00:00 2001
From: Ivan Mahonin <bh@icystar.com>
Date: Oct 17 2018 05:44:07 +0000
Subject: Fix CheckerBoard


---

diff --git a/synfig-core/src/modules/mod_geometry/checkerboard.cpp b/synfig-core/src/modules/mod_geometry/checkerboard.cpp
index fb77d75..09ae4a9 100644
--- a/synfig-core/src/modules/mod_geometry/checkerboard.cpp
+++ b/synfig-core/src/modules/mod_geometry/checkerboard.cpp
@@ -97,6 +97,18 @@ public:
 	static Token token;
 	virtual Token::Handle get_token() const { return token.handle(); }
 
+	virtual void on_target_set_as_source() {
+		Task::Handle &subtask = sub_task(0);
+		if ( subtask
+		  && subtask->target_surface == target_surface
+		  && !Color::is_straight(blend_method) )
+		{
+			trunc_by_bounds();
+			subtask->source_rect = source_rect;
+			subtask->target_rect = target_rect;
+		}
+	}
+
 	virtual Color::BlendMethodFlags get_supported_blend_methods() const
 		{ return Color::BLEND_METHODS_ALL; }
 
@@ -125,7 +137,8 @@ public:
 			return false;
 
 		Surface::alpha_pen apen(la->get_surface().get_pen(target_rect.minx, target_rect.miny));
-		apen.set_blend_method(blend_method);
+		ColorReal amount = blend ? this->amount : ColorReal(1.0);
+		apen.set_blend_method(blend ? blend_method : Color::BLEND_COMPOSITE);
 		Color c = color;
 		if (antialias) {
 			ColorReal kx(matrix.axis_x().mag()*0.5);
@@ -166,9 +179,9 @@ public:
 };
 
 rendering::Task::Token TaskCheckerBoard::token(
-	DescAbstract<TaskCheckerBoard>("TaskCheckerBoard") );
+	DescAbstract<TaskCheckerBoard>("CheckerBoard") );
 rendering::Task::Token TaskCheckerBoardSW::token(
-	DescReal<TaskCheckerBoardSW, TaskCheckerBoard>("TaskCheckerBoardSW") );
+	DescReal<TaskCheckerBoardSW, TaskCheckerBoard>("CheckerBoardSW") );
 
 } // namespace
 
diff --git a/synfig-core/src/synfig/rendering/common/task/tasktransformation.cpp b/synfig-core/src/synfig/rendering/common/task/tasktransformation.cpp
index db591e4..af1b874 100644
--- a/synfig-core/src/synfig/rendering/common/task/tasktransformation.cpp
+++ b/synfig-core/src/synfig/rendering/common/task/tasktransformation.cpp
@@ -46,9 +46,9 @@ using namespace rendering;
 
 
 Task::Token TaskTransformation::token(
-	DescAbstract<TaskTransformation>("TaskTransformation") );
+	DescAbstract<TaskTransformation>("Transformation") );
 Task::Token TaskTransformationAffine::token(
-	DescAbstract<TaskTransformationAffine, TaskTransformation>("TaskTransformationAffine") );
+	DescAbstract<TaskTransformationAffine, TaskTransformation>("TransformationAffine") );
 
 
 TaskTransformation::TaskTransformation():