Use per-typeface sets of glyphs for nvpr text

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 1ae2f5856bd4cfe8a521f9744991f26170c5793a..06f63872005fb9c0664707ccea4c09b07f36e81a 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -21,6 +21,8 @@ class GrPathRenderer;
 class GrPathRendererChain;
 class GrStencilBuffer;
 class GrVertexBufferAllocPool;
+class SkDescriptor;
+class SkTypeface;
 
 class GrGpu : public GrDrawTarget {
 public:
@@ -149,11 +151,33 @@ public:
     GrPath* createPath(const SkPath& path, const SkStrokeRec& stroke);
 
     /**
-     * Creates a path range object that can be used to draw multiple paths via
-     * drawPaths(). It is only legal to call this if the caps report support for
-     * path rendering.
+     * Creates a range of glyph paths, indexed by glyph id. The glyphs will have an

[bsalomon, 2014/09/15 14:16:21]

I'm wondering if the PR class should be accessible to the text context to avoid
having a bunch of shims on GrGpu.

[Chris Dalton, 2014/09/15 21:05:25]

That could work, but I think createPath() ought to follow the same pattern.
Should we change the behavior for that one too? What about having the
createPath/createGlyphs methods on the GrContext? Should we take both out of
there as well?

+     * inverted y-direction in order to match the raw font path data.
+     *
+     * @param SkTypeface   Typeface that defines the glyphs.
+     *                     If null, the default typeface will be used.
+     *
+     * @param SkDescriptor Additional font configuration that specifies the font's size,
+     *                     stroke, and other flags. This will generally come from an
+     *                     SkGlyphCache.
+     *
+     *                     It is recommended to leave this value null when possible, in
+     *                     which case the glyphs will be loaded directly from the font's
+     *                     raw path data and sized at SkPaint::kCanonicalTextSizeForPaths.
+     *                     This results in less memory usage and more efficient GPU paths.
+     *
+     *                     If non-null, the glyph paths will match the font descriptor,
+     *                     including with the stroke information baked directly into
+     *                     the outlines.
+     *
+     * @param SkStrokeRec  Common stroke that the GPU will apply to every path. Note
+     *                     that if the glyph outlines contain strokes from the font
+     *                     descriptor, this stroke will be applied on top of those
+     *                     outlines.
+     *
+     * It is only legal to call this if the caps report support for path rendering.
      */
-    GrPathRange* createPathRange(size_t size, const SkStrokeRec&);
+    GrPathRange* createGlyphs(const SkTypeface*, const SkDescriptor*, const SkStrokeRec&);
 
     /**
      * Returns an index buffer that can be used to render quads.