add SkFontPriv.h
Bug: skia:2664
Change-Id: I1751aee25c64880e528432441be7fa6129fc1e0f
Reviewed-on: https://skia-review.googlesource.com/c/168260
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/src/core/SkFontPriv.h b/src/core/SkFontPriv.h
new file mode 100644
index 0000000..a9d1bdd
--- /dev/null
+++ b/src/core/SkFontPriv.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkFontPriv_DEFINED
+#define SkFontPriv_DEFINED
+
+#include "SkFont.h"
+#include "SkMatrix.h"
+#include "SkTypeface.h"
+
+class SkFontPriv {
+public:
+ /**
+ * Return a matrix that applies the paint's text values: size, scale, skew
+ */
+ static SkMatrix MakeTextMatrix(SkScalar size, SkScalar scaleX, SkScalar skewX) {
+ SkMatrix m = SkMatrix::MakeScale(size * scaleX, size);
+ if (skewX) {
+ m.postSkew(skewX, 0);
+ }
+ return m;
+ }
+
+ static SkMatrix MakeTextMatrix(const SkFont& font) {
+ return MakeTextMatrix(font.getSize(), font.getScaleX(), font.getSkewX());
+ }
+
+ // returns -1 if buffer is invalid for specified encoding
+ static int ValidCountText(const void* text, size_t length, SkTextEncoding);
+
+ static SkTypeface* GetTypefaceOrDefault(const SkFont& font) {
+ return font.getTypeface() ? font.getTypeface() : SkTypeface::GetDefaultTypeface();
+ }
+
+ static sk_sp<SkTypeface> RefTypefaceOrDefault(const SkFont& font) {
+ return font.getTypeface() ? font.refTypeface() : SkTypeface::MakeDefault();
+ }
+};
+
+#endif
