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-rw-r--r--src/core/SkMatrix.cpp44
1 files changed, 26 insertions, 18 deletions
diff --git a/src/core/SkMatrix.cpp b/src/core/SkMatrix.cpp
index 8778f78f41..95662fc4cd 100644
--- a/src/core/SkMatrix.cpp
+++ b/src/core/SkMatrix.cpp
@@ -7,9 +7,10 @@
#include "SkMatrix.h"
#include "SkFloatBits.h"
-#include "SkLazyPtr.h"
#include "SkString.h"
+#include <stddef.h>
+
// In a few places, we performed the following
// a * b + c * d + e
// as
@@ -1560,31 +1561,38 @@ bool SkMatrix::getMinMaxScales(SkScalar scaleFactors[2]) const {
namespace {
-SkMatrix* create_identity() {
- SkMatrix* m = SkNEW(SkMatrix);
- m->reset();
- return m;
-}
+struct PODMatrix {
+ SkScalar matrix[9];
+ uint32_t typemask;
-SkMatrix* create_invalid() {
- SkMatrix* m = SkNEW(SkMatrix);
- m->setAll(SK_ScalarMax, SK_ScalarMax, SK_ScalarMax,
- SK_ScalarMax, SK_ScalarMax, SK_ScalarMax,
- SK_ScalarMax, SK_ScalarMax, SK_ScalarMax);
- m->getType(); // Force the type to be computed.
- return m;
-}
+ const SkMatrix& asSkMatrix() const { return *reinterpret_cast<const SkMatrix*>(this); }
+};
+SK_COMPILE_ASSERT(sizeof(PODMatrix) == sizeof(SkMatrix), PODMatrixSizeMismatch);
} // namespace
const SkMatrix& SkMatrix::I() {
- SK_DECLARE_STATIC_LAZY_PTR(SkMatrix, identity, create_identity);
- return *identity.get();
+ SK_COMPILE_ASSERT(offsetof(SkMatrix, fMat) == offsetof(PODMatrix, matrix), BadfMat);
+ SK_COMPILE_ASSERT(offsetof(SkMatrix, fTypeMask) == offsetof(PODMatrix, typemask), BadfTypeMask);
+
+ static const PODMatrix identity = { {SK_Scalar1, 0, 0,
+ 0, SK_Scalar1, 0,
+ 0, 0, SK_Scalar1 },
+ kIdentity_Mask | kRectStaysRect_Mask};
+ SkASSERT(identity.asSkMatrix().isIdentity());
+ return identity.asSkMatrix();
}
const SkMatrix& SkMatrix::InvalidMatrix() {
- SK_DECLARE_STATIC_LAZY_PTR(SkMatrix, invalid, create_invalid);
- return *invalid.get();
+ SK_COMPILE_ASSERT(offsetof(SkMatrix, fMat) == offsetof(PODMatrix, matrix), BadfMat);
+ SK_COMPILE_ASSERT(offsetof(SkMatrix, fTypeMask) == offsetof(PODMatrix, typemask), BadfTypeMask);
+
+ static const PODMatrix invalid =
+ { {SK_ScalarMax, SK_ScalarMax, SK_ScalarMax,
+ SK_ScalarMax, SK_ScalarMax, SK_ScalarMax,
+ SK_ScalarMax, SK_ScalarMax, SK_ScalarMax },
+ kTranslate_Mask | kScale_Mask | kAffine_Mask | kPerspective_Mask };
+ return invalid.asSkMatrix();
}
///////////////////////////////////////////////////////////////////////////////