add localmatrix-shader
BUG=skia:
R=scroggo@google.com, dominikg@chromium.org
Author: reed@google.com
Review URL: https://codereview.chromium.org/272593002
git-svn-id: http://skia.googlecode.com/svn/trunk@14633 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/core/SkShader.h b/include/core/SkShader.h
index dc93b84..2f3764c 100644
--- a/include/core/SkShader.h
+++ b/include/core/SkShader.h
@@ -401,6 +401,23 @@
static SkShader* CreatePictureShader(SkPicture* src, TileMode tmx, TileMode tmy,
const SkMatrix* localMatrix = NULL);
+ /**
+ * Return a shader that will apply the specified localMatrix to the proxy shader.
+ * The specified matrix will be applied before any matrix associated with the proxy.
+ *
+ * Note: ownership of the proxy is not transferred (though a ref is taken).
+ */
+ static SkShader* CreateLocalMatrixShader(SkShader* proxy, const SkMatrix& localMatrix);
+
+ /**
+ * If this shader can be represented by another shader + a localMatrix, return that shader
+ * and, if not NULL, the localMatrix. If not, return NULL and ignore the localMatrix parameter.
+ *
+ * Note: the returned shader (if not NULL) will have been ref'd, and it is the responsibility
+ * of the caller to balance that with unref() when they are done.
+ */
+ virtual SkShader* refAsALocalMatrixShader(SkMatrix* localMatrix) const;
+
SK_TO_STRING_VIRT()
SK_DEFINE_FLATTENABLE_TYPE(SkShader)