grab from latest android

git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 53 insertions, 0 deletions

diff --git a/include/effects/SkColorMatrix.h b/include/effects/SkColorMatrix.h
new file mode 100644
index 0000000000..cee5d6e2d6
--- /dev/null
+++ b/include/effects/SkColorMatrix.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SkColorMatrix_DEFINED
+#define SkColorMatrix_DEFINED
+
+#include "SkScalar.h"
+
+class SkColorMatrix {
+public:
+    SkScalar    fMat[20];
+    
+    void setIdentity();
+    void setScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
+                  SkScalar aScale = SK_Scalar1);
+    void preScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
+                  SkScalar aScale = SK_Scalar1);
+    void postScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
+                   SkScalar aScale = SK_Scalar1);
+
+    enum Axis {
+        kR_Axis = 0,
+        kG_Axis = 1,
+        kB_Axis = 2
+    };
+    void setRotate(Axis, SkScalar degrees);
+    void setSinCos(Axis, SkScalar sine, SkScalar cosine);
+    void preRotate(Axis, SkScalar degrees);
+    void postRotate(Axis, SkScalar degrees);
+
+    void setConcat(const SkColorMatrix& a, const SkColorMatrix& b);
+    void preConcat(const SkColorMatrix& mat) { this->setConcat(*this, mat); }
+    void postConcat(const SkColorMatrix& mat) { this->setConcat(mat, *this); }
+
+    void setSaturation(SkScalar sat);
+    void setRGB2YUV();
+    void setYUV2RGB();
+};
+
+#endif