fixup GLPrograms textblob todo

src/gpu/text/GrAtlasTextContext.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrAtlasTextContext.h"
 
 #include "GrDrawContext.h"
 #include "GrDrawTarget.h"
@@ skipping 371 matching lines @@
     skPaint.setSubpixelText(random->nextBool());
 
     GrPaint grPaint;
     if (!SkPaintToGrPaint(context, skPaint, viewMatrix, &grPaint)) {
         SkFAIL("couldn't convert paint\n");
     }
 
     const char* text = "The quick brown fox jumps over the lazy dog.";
     int textLen = (int)strlen(text);
 
-    // Setup clip
-    GrClip clip;
-
+    // create some random x/y offsets, including negative offsets
+    static const int kMaxTrans = 1024;
+    int xPos = (random->nextU() % 2) * 2 - 1;
+    int yPos = (random->nextU() % 2) * 2 - 1;
+    int xInt = (random->nextU() % kMaxTrans) * xPos;
+    int yInt = (random->nextU() % kMaxTrans) * yPos;
+    SkScalar x = SkIntToScalar(xInt);
+    SkScalar y = SkIntToScalar(yInt);
+    
     // right now we don't handle textblobs, nor do we handle drawPosText.  Since we only
     // intend to test the batch with this unit test, that is okay.
     SkAutoTUnref<GrAtlasTextBlob> blob(
         GrAtlasTextContext::CreateDrawTextBlob(context->getTextBlobCache(),
                                                context->getBatchFontCache(),
                                                *context->caps()->shaderCaps(), grPaint, skPaint,
                                                viewMatrix,
                                                gSurfaceProps, text,
-                                               static_cast<size_t>(textLen), 0, 0));
+                                               static_cast<size_t>(textLen), x, y));
 
-    // We'd like to be able to test this with random translations, but currently the vertex
-    // bounds and vertices will get out of sync
-    SkScalar x = 0.f;//SkIntToScalar(random->nextU());
-    SkScalar y = 0.f;//SkIntToScalar(random->nextU());
     return blob->test_createBatch(textLen, 0, 0, viewMatrix, x, y, color, skPaint,
                                   gSurfaceProps, gTextContext->dfAdjustTable(),
                                   context->getBatchFontCache());
 }
 
 #endif