Start canonicalizing color for all A8 textblobs

tools/sk_tool_utils.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "sk_tool_utils.h"
 #include "sk_tool_utils_flags.h"
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkShader.h"
 #include "SkTestScalerContext.h"
+#include "SkTextBlob.h"
 
 DEFINE_bool(portableFonts, false, "Use portable fonts");
 DEFINE_bool(resourceFonts, false, "Use resource fonts");
 
 namespace sk_tool_utils {
 
 const char* colortype_name(SkColorType ct) {
     switch (ct) {
         case kUnknown_SkColorType:      return "Unknown";
         case kAlpha_8_SkColorType:      return "Alpha_8";
@@ skipping 45 matching lines @@
             bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
 }
 
 void draw_checkerboard(SkCanvas* canvas, SkColor c1, SkColor c2, int size) {
     SkPaint paint;
     paint.setShader(create_checkerboard_shader(c1, c2, size))->unref();
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     canvas->drawPaint(paint);
 }
 
+void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint,
+                      SkScalar x, SkScalar y) {
+    SkPaint paint(origPaint);
+    SkTDArray<uint16_t> glyphs;
+
+    size_t len = strlen(text);
+    glyphs.append(paint.textToGlyphs(text, len, NULL));
+    paint.textToGlyphs(text, len, glyphs.begin());
+
+    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
+    const SkTextBlobBuilder::RunBuffer& run = builder->allocRun(paint, glyphs.count(), x, y,
+                                                                NULL);
+    memcpy(run.glyphs, glyphs.begin(), glyphs.count() * sizeof(uint16_t));
+}
+
+
 }  // namespace sk_tool_utils