add SkSize for dimensions

add SkShape baseclass, in the hopes of having SkPicture inherit from that, and 
also using shapes as the extension mechanism for things like animated-gif



git-svn-id: http://skia.googlecode.com/svn/trunk@174 2bbb7eff-a529-9590-31e7-b0007b416f81

3 files changed, 94 insertions, 0 deletions

diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 199c1b0b97..57b4f7b340 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -22,6 +22,7 @@
 #include "SkDrawLooper.h"
 #include "SkPicture.h"
 #include "SkScalarCompare.h"
+#include "SkShape.h"
 #include "SkTemplates.h"
 #include "SkUtils.h"
 #include <new>
@@ -1357,12 +1358,19 @@ void SkCanvas::drawTextOnPathHV(const void* text, size_t byteLength,
     this->drawTextOnPath(text, byteLength, path, &matrix, paint);
 }
 
+///////////////////////////////////////////////////////////////////////////////
+
 void SkCanvas::drawPicture(SkPicture& picture) {
     int saveCount = save();
     picture.draw(this);
     restoreToCount(saveCount);
 }
 
+void SkCanvas::drawShape(SkShape* shape) {
+    // shape baseclass takes care of save/restore
+    shape->draw(this);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
diff --git a/src/core/SkShape.cpp b/src/core/SkShape.cpp
new file mode 100644
index 0000000000..a6d19af96b
--- /dev/null
+++ b/src/core/SkShape.cpp
@@ -0,0 +1,85 @@
+#include "SkCanvas.h"
+#include "SkShape.h"
+#include "SkMatrix.h"
+
+SkShape::~SkShape() {
+    if (fMatrix) {
+        SkDELETE(fMatrix);
+    }
+}
+
+void SkShape::getMatrix(SkMatrix* matrix) const {
+    if (matrix) {
+        if (fMatrix) {
+            *matrix = *fMatrix;
+        } else {
+            matrix->reset();
+        }
+    }
+}
+
+void SkShape::setMatrix(const SkMatrix& matrix) {
+    if (matrix.isIdentity()) {
+        this->resetMatrix();
+    } else {
+        if (NULL == fMatrix) {
+            fMatrix = SkNEW(SkMatrix);
+        }
+        *fMatrix = matrix;
+    }
+}
+
+void SkShape::resetMatrix() {
+    if (fMatrix) {
+        SkDELETE(fMatrix);
+        fMatrix = NULL;
+    }
+}
+
+void SkShape::draw(SkCanvas* canvas) {
+    int saveCount = canvas->getSaveCount();
+    if (fMatrix) {
+        canvas->save(SkCanvas::kMatrix_SaveFlag);
+        canvas->concat(*fMatrix);
+    }
+    this->onDraw(canvas);
+    canvas->restoreToCount(saveCount);
+}
+
+void SkShape::drawXY(SkCanvas* canvas, SkScalar dx, SkScalar dy) {
+    int saveCount = canvas->save(SkCanvas::kMatrix_SaveFlag);
+    canvas->translate(dx, dy);
+    if (fMatrix) {
+        canvas->concat(*fMatrix);
+    }
+    this->onDraw(canvas);
+    canvas->restoreToCount(saveCount);
+}
+
+void SkShape::drawMatrix(SkCanvas* canvas, const SkMatrix& matrix) {
+    int saveCount = canvas->save(SkCanvas::kMatrix_SaveFlag);
+    canvas->concat(matrix);
+    if (fMatrix) {
+        canvas->concat(*fMatrix);
+    }
+    this->onDraw(canvas);
+    canvas->restoreToCount(saveCount);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+void SkShape::flatten(SkFlattenableWriteBuffer& buffer) {
+    buffer.writeBool(fMatrix != NULL);
+    if (fMatrix) {
+        *(SkMatrix*)buffer.reserve(sizeof(SkMatrix)) = *fMatrix;
+    }
+}
+
+SkShape::SkShape(SkFlattenableReadBuffer& buffer) {
+    fMatrix = NULL;
+    if (buffer.readBool()) {
+        fMatrix = SkNEW(SkMatrix);
+        buffer.read(fMatrix, sizeof(*fMatrix));
+    }
+}
+
diff --git a/src/core/core_files.mk b/src/core/core_files.mk
index 27849e7021..94e19d7255 100644
--- a/src/core/core_files.mk
+++ b/src/core/core_files.mk
@@ -72,6 +72,7 @@ SOURCE := \
     SkScan_Hairline.cpp \
     SkScan_Path.cpp \
     SkShader.cpp \
+    SkShape.cpp \
     SkSpriteBlitter_ARGB32.cpp \
     SkSpriteBlitter_RGB16.cpp \
     SkStream.cpp \