check-point for drawables (experimental)

git-svn-id: http://skia.googlecode.com/svn/trunk@133 2bbb7eff-a529-9590-31e7-b0007b416f81

3 files changed, 210 insertions, 0 deletions

diff --git a/include/core/SkDrawable.h b/include/core/SkDrawable.h
new file mode 100644
index 0000000000..793534759a
--- /dev/null
+++ b/include/core/SkDrawable.h
@@ -0,0 +1,54 @@
+#ifndef SkDrawable_DEFINED
+#define SkDrawable_DEFINED
+
+#include "SkFlattenable.h"
+#include "SkMatrix.h"
+
+class SkCanvas;
+struct SkRect;
+
+class SkDrawable : public SkFlattenable {
+public:
+            SkDrawable();
+    virtual ~SkDrawable();
+
+    void getMatrix(SkMatrix*) const;
+    void setMatrix(const SkMatrix&);
+    void resetMatrix();
+        
+    void draw(SkCanvas*);
+    
+    void inval() {}
+
+    SkDrawable* attachChildToFront(SkDrawable* child);
+    SkDrawable* attachChildToBack(SkDrawable* child);
+
+    SkDrawable* getParent() const { return fParent; }
+    void detachFromParent();
+    void detachAllChildren();
+
+    class B2FIter {
+    public:
+        B2FIter(const SkDrawable* parent);
+        SkDrawable* next();
+    private:
+        SkDrawable* fFirstChild;
+        SkDrawable* fChild;
+    };
+    
+protected:
+    virtual void onDraw(SkCanvas*) {}
+    
+private:
+    SkMatrix    fMatrix;
+
+    SkDrawable* fParent;
+    SkDrawable* fFirstChild;
+    SkDrawable* fNextSibling;
+    SkDrawable* fPrevSibling;
+
+    typedef SkFlattenable INHERITED;
+};
+
+#endif
+
diff --git a/src/core/SkDrawable.cpp b/src/core/SkDrawable.cpp
new file mode 100644
index 0000000000..85f3175bdb
--- /dev/null
+++ b/src/core/SkDrawable.cpp
@@ -0,0 +1,152 @@
+#include "SkDrawable.h"
+#include "SkCanvas.h"
+
+SkDrawable::SkDrawable() {
+    fMatrix.reset();
+    fParent = fFirstChild = fNextSibling = fPrevSibling = NULL;
+}
+
+SkDrawable::~SkDrawable() {
+    this->detachAllChildren();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+void SkDrawable::resetMatrix() {
+    fMatrix.reset();
+}
+
+void SkDrawable::getMatrix(SkMatrix* matrix) const {
+    if (matrix) {
+        *matrix = fMatrix;
+    }
+}
+
+void SkDrawable::setMatrix(const SkMatrix& matrix) {
+    if (fMatrix != matrix) {
+        this->inval();
+        fMatrix = matrix;
+        this->inval();
+    }
+}
+
+void SkDrawable::draw(SkCanvas* canvas) {
+    SkAutoCanvasRestore ar(canvas, false);
+    canvas->save(SkCanvas::kMatrix_SaveFlag);
+    canvas->concat(fMatrix);
+
+    this->onDraw(canvas);
+    
+    B2FIter iter(this);
+    SkDrawable* child;
+    while ((child = iter.next()) != NULL) {
+        child->draw(canvas);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+void SkDrawable::detachFromParent() {
+	SkDrawable* parent = fParent;
+
+	if (NULL == parent) {
+		return;
+    }
+    
+    this->inval();
+    
+	SkDrawable*	next = NULL;
+    
+	if (fNextSibling != this) {	// do we have any siblings
+		fNextSibling->fPrevSibling = fPrevSibling;
+		fPrevSibling->fNextSibling = fNextSibling;
+		next = fNextSibling;
+	}
+    
+	if (fParent->fFirstChild == this) {
+		fParent->fFirstChild = next;
+    }
+    
+	fParent = fNextSibling = fPrevSibling = NULL;
+	this->unref();
+}
+
+SkDrawable* SkDrawable::attachChildToBack(SkDrawable* child) {
+	SkASSERT(child != this);
+
+	if (child == NULL || fFirstChild == child) {
+		return child;
+    }
+
+	child->ref();
+	child->detachFromParent();
+
+	if (fFirstChild == NULL) {
+		child->fNextSibling = child;
+		child->fPrevSibling = child;
+	} else {
+		child->fNextSibling = fFirstChild;
+		child->fPrevSibling = fFirstChild->fPrevSibling;
+		fFirstChild->fPrevSibling->fNextSibling = child;
+		fFirstChild->fPrevSibling = child;
+	}
+
+	fFirstChild = child;
+	child->fParent = this;
+	child->inval();
+	return child;
+}
+
+SkDrawable* SkDrawable::attachChildToFront(SkDrawable* child) {
+	SkASSERT(child != this);
+
+    if (child == NULL || fFirstChild && fFirstChild->fPrevSibling == child) {
+		return child;
+    }
+
+	child->ref();
+	child->detachFromParent();
+
+	if (fFirstChild == NULL) {
+		fFirstChild = child;
+		child->fNextSibling = child;
+		child->fPrevSibling = child;
+	} else {
+		child->fNextSibling = fFirstChild;
+		child->fPrevSibling = fFirstChild->fPrevSibling;
+		fFirstChild->fPrevSibling->fNextSibling = child;
+		fFirstChild->fPrevSibling = child;
+	}
+
+	child->fParent = this;
+	child->inval();
+	return child;
+}
+
+void SkDrawable::detachAllChildren() {
+	while (fFirstChild) {
+		fFirstChild->detachFromParent();
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+SkDrawable::B2FIter::B2FIter(const SkDrawable* parent) {
+	fFirstChild = parent ? parent->fFirstChild : NULL;
+	fChild = fFirstChild;
+}
+
+SkDrawable*	SkDrawable::B2FIter::next() {
+	SkDrawable* curr = fChild;
+    
+	if (fChild) {
+		SkDrawable* next = fChild->fNextSibling;
+		if (next == fFirstChild) {
+			next = NULL;
+        }
+		fChild = next;
+	}
+	return curr;
+}
+
+
diff --git a/xcode/sampleapp/SampleApp.xcodeproj/project.pbxproj b/xcode/sampleapp/SampleApp.xcodeproj/project.pbxproj
index 3def3dae0e..e172db7628 100644
--- a/xcode/sampleapp/SampleApp.xcodeproj/project.pbxproj
+++ b/xcode/sampleapp/SampleApp.xcodeproj/project.pbxproj
@@ -69,6 +69,7 @@
 		00A41E4B0EFC312F00C9CBEB /* SampleArc.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 00A41E4A0EFC312F00C9CBEB /* SampleArc.cpp */; };
 		0156F80407C56A3000C6122B /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0156F80307C56A3000C6122B /* Foundation.framework */; };
 		01FC44D507BD3BB800D228F4 /* Quartz.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 01FC44D407BD3BB800D228F4 /* Quartz.framework */; };
+		2714E7960F7733EE00E95AE0 /* SkDrawable.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2714E7950F7733EE00E95AE0 /* SkDrawable.cpp */; };
 		8D0C4E8D0486CD37000505A6 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = 0867D6AAFE840B52C02AAC07 /* InfoPlist.strings */; };
 		8D0C4E8E0486CD37000505A6 /* main.nib in Resources */ = {isa = PBXBuildFile; fileRef = 02345980000FD03B11CA0E72 /* main.nib */; };
 		8D0C4E920486CD37000505A6 /* Carbon.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 20286C33FDCF999611CA2CEA /* Carbon.framework */; };
@@ -187,6 +188,7 @@
 		0867D6ABFE840B52C02AAC07 /* English */ = {isa = PBXFileReference; fileEncoding = 10; lastKnownFileType = text.plist.strings; name = English; path = English.lproj/InfoPlist.strings; sourceTree = "<group>"; };
 		1870340FFE93FCAF11CA0CD7 /* English */ = {isa = PBXFileReference; lastKnownFileType = wrapper.nib; name = English; path = English.lproj/main.nib; sourceTree = "<group>"; };
 		20286C33FDCF999611CA2CEA /* Carbon.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Carbon.framework; path = /System/Library/Frameworks/Carbon.framework; sourceTree = "<absolute>"; };
+		2714E7950F7733EE00E95AE0 /* SkDrawable.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SkDrawable.cpp; path = ../../src/core/SkDrawable.cpp; sourceTree = SOURCE_ROOT; };
 		32DBCF6D0370B57F00C91783 /* CICarbonSample_Prefix.pch */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CICarbonSample_Prefix.pch; sourceTree = "<group>"; };
 		4A9504C8FFE6A3BC11CA0CBA /* ApplicationServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = ApplicationServices.framework; path = /System/Library/Frameworks/ApplicationServices.framework; sourceTree = "<absolute>"; };
 		4A9504CAFFE6A41611CA0CBA /* CoreServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreServices.framework; path = /System/Library/Frameworks/CoreServices.framework; sourceTree = "<absolute>"; };
@@ -328,6 +330,7 @@
 				002884490EFAA35C0083E387 /* core.xcodeproj */,
 				002884B40EFAB69F0083E387 /* maccore.xcodeproj */,
 				00003C8C0EFC230E000FF73A /* effects.xcodeproj */,
+				2714E7950F7733EE00E95AE0 /* SkDrawable.cpp */,
 			);
 			name = CICarbonSample;
 			sourceTree = "<group>";
@@ -515,6 +518,7 @@
 				007C785E0F3B4C230004B142 /* SamplePathClip.cpp in Sources */,
 				009CC9190F65918A002185BE /* SampleFontScalerTest.cpp in Sources */,
 				007A7CB30F01658C00A2D6EE /* SamplePicture.cpp in Sources */,
+				2714E7960F7733EE00E95AE0 /* SkDrawable.cpp in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};