From 73bd9cfa67d62a500d45bee844cf8cd863890109 Mon Sep 17 00:00:00 2001
From: dooglus <dooglus@1f10aa63-cdf2-0310-b900-c93c546f37ac>
Date: Tue, 4 Sep 2007 22:31:56 +0000
Subject: [PATCH] The XOR Pattern layer now has 'Z Depth', 'Amount' and 'Blend
 Method' parameters.  And why not?

git-svn-id: http://svn.voria.com/code@598 1f10aa63-cdf2-0310-b900-c93c546f37ac
---
 .../trunk/src/modules/lyr_std/xorpattern.cpp       | 48 ++++++++++++++++++----
 synfig-core/trunk/src/modules/lyr_std/xorpattern.h |  5 ++-
 2 files changed, 44 insertions(+), 9 deletions(-)

diff --git a/synfig-core/trunk/src/modules/lyr_std/xorpattern.cpp b/synfig-core/trunk/src/modules/lyr_std/xorpattern.cpp
index cbbfe56..9e74ead 100644
--- a/synfig-core/trunk/src/modules/lyr_std/xorpattern.cpp
+++ b/synfig-core/trunk/src/modules/lyr_std/xorpattern.cpp
@@ -60,6 +60,7 @@ SYNFIG_LAYER_SET_CVS_ID(XORPattern,"$Id$");
 /* === M E T H O D S ======================================================= */
 
 XORPattern::XORPattern():
+	Layer_Composite	(1.0,Color::BLEND_STRAIGHT),
 	pos(0.125,0.125),
 	size(0.25,0.25)
 {
@@ -70,7 +71,8 @@ XORPattern::set_param(const String & param, const ValueBase &value)
 {
 	IMPORT(pos);
 	IMPORT(size);
-	return false;
+
+	return Layer_Composite::set_param(param,value);
 }
 
 ValueBase
@@ -82,27 +84,36 @@ XORPattern::get_param(const String & param)const
 	EXPORT_NAME();
 	EXPORT_VERSION();
 
-	return ValueBase();
+	return Layer_Composite::get_param(param);
 }
 
 Color
 XORPattern::get_color(Context context, const Point &point)const
 {
+	if(get_amount()==0.0)
+		return context.get_color(point);
+
 	unsigned int a=(unsigned int)floor((point[0]-pos[0])/size[0]), b=(unsigned int)floor((point[1]-pos[1])/size[1]);
 	unsigned char rindex=(a^b);
 	unsigned char gindex=(a^(~b))*4;
 	unsigned char bindex=~(a^b)*2;
 
-	return Color((Color::value_type)rindex/(Color::value_type)255.0,
-				 (Color::value_type)gindex/(Color::value_type)255.0,
-				 (Color::value_type)bindex/(Color::value_type)255.0,
-				 1.0);
+	Color color((Color::value_type)rindex/(Color::value_type)255.0,
+				(Color::value_type)gindex/(Color::value_type)255.0,
+				(Color::value_type)bindex/(Color::value_type)255.0,
+				1.0);
+
+	if(get_amount() == 1 && get_blend_method() == Color::BLEND_STRAIGHT)
+		return color;
+	else
+		return Color::blend(color,context.get_color(point),get_amount(),get_blend_method());
+
 }
 
 Layer::Vocab
 XORPattern::get_param_vocab()const
 {
-	Layer::Vocab ret;
+	Layer::Vocab ret(Layer_Composite::get_param_vocab());
 
 	ret.push_back(ParamDesc("pos")
 		.set_local_name(_("Offset"))
@@ -114,3 +125,26 @@ XORPattern::get_param_vocab()const
 
 	return ret;
 }
+
+synfig::Layer::Handle
+XORPattern::hit_check(synfig::Context context, const synfig::Point &getpos)const
+{
+	// if we have a zero amount
+	if(get_amount()==0.0)
+		// then the click passes down to our context
+		return context.hit_check(getpos);
+
+	synfig::Layer::Handle tmp;
+	// if we are behind the context, and the click hits something in the context
+	if(get_blend_method()==Color::BLEND_BEHIND && (tmp=context.hit_check(getpos)))
+		// then return the thing it hit in the context
+		return tmp;
+
+	// if we're using an 'onto' blend method and the click missed the context
+	if(Color::is_onto(get_blend_method()) && !(tmp=context.hit_check(getpos)))
+		// then it misses everything
+		return 0;
+
+	// otherwise the click hit us, since we're the size of the whole plane
+	return const_cast<XORPattern*>(this);
+}
diff --git a/synfig-core/trunk/src/modules/lyr_std/xorpattern.h b/synfig-core/trunk/src/modules/lyr_std/xorpattern.h
index 2408f37..760a6cb 100644
--- a/synfig-core/trunk/src/modules/lyr_std/xorpattern.h
+++ b/synfig-core/trunk/src/modules/lyr_std/xorpattern.h
@@ -29,7 +29,7 @@
 
 /* === H E A D E R S ======================================================= */
 
-#include <synfig/layer.h>
+#include <synfig/layer_composite.h>
 #include <synfig/color.h>
 #include <synfig/context.h>
 #include <synfig/vector.h>
@@ -44,7 +44,7 @@ using namespace synfig;
 using namespace std;
 using namespace etl;
 
-class XORPattern : public Layer
+class XORPattern : public synfig::Layer_Composite, public synfig::Layer_NoDeform
 {
 	SYNFIG_LAYER_MODULE_EXT
 
@@ -60,6 +60,7 @@ public:
 	virtual ValueBase get_param(const String &param)const;
 	virtual Color get_color(Context context, const Point &pos)const;
 	virtual Vocab get_param_vocab()const;
+	virtual synfig::Layer::Handle hit_check(synfig::Context context, const synfig::Point &point)const;
 };
 
 /* === E N D =============================================================== */
-- 
2.7.4