Hook in rough distance field support for fonts
R=bsalomon@google.com
Review URL: https://codereview.chromium.org/41213003
git-svn-id: http://skia.googlecode.com/svn/trunk/include@12229 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/GrDistanceFieldTextContext.h b/gpu/GrDistanceFieldTextContext.h
new file mode 100755
index 0000000..217faf3
--- /dev/null
+++ b/gpu/GrDistanceFieldTextContext.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrDistanceFieldTextContext_DEFINED
+#define GrDistanceFieldTextContext_DEFINED
+
+#include "GrTextContext.h"
+
+class GrTextStrike;
+
+/*
+ * This class implements GrTextContext using distance field fonts
+ */
+class GrDistanceFieldTextContext : public GrTextContext {
+public:
+ GrDistanceFieldTextContext(GrContext*, const GrPaint&, SkColor, SkScalar textRatio);
+ virtual ~GrDistanceFieldTextContext();
+
+ virtual void drawPackedGlyph(GrGlyph::PackedID, GrFixed left, GrFixed top,
+ GrFontScaler*) SK_OVERRIDE;
+
+private:
+ GrTextStrike* fStrike;
+ SkScalar fTextRatio;
+
+ void flushGlyphs(); // automatically called by destructor
+
+ enum {
+ kMinRequestedGlyphs = 1,
+ kDefaultRequestedGlyphs = 64,
+ kMinRequestedVerts = kMinRequestedGlyphs * 4,
+ kDefaultRequestedVerts = kDefaultRequestedGlyphs * 4,
+ };
+
+ SkColor fSkPaintColor;
+ SkPoint* fVertices;
+ int32_t fMaxVertices;
+ GrTexture* fCurrTexture;
+ int fCurrVertex;
+};
+
+#endif
