remove unused functions

src/image/SkImagePriv.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImagePriv.h"
 #include "SkCanvas.h"
 #include "SkPicture.h"
@@ skipping 51 matching lines @@
     } else {
         bm.lockPixels();
         if (bm.getPixels()) {
             image = SkImage::NewRasterCopy(info, bm.getPixels(), bm.rowBytes());
         }
         bm.unlockPixels();
     }
     return image;
 }
 
-static bool needs_layer(const SkPaint& paint) {
-    return  0xFF != paint.getAlpha() ||
-    paint.getColorFilter() ||
-    paint.getImageFilter() ||
-    SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode);
-}
-
-void SkImagePrivDrawPicture(SkCanvas* canvas, SkPicture* picture,
-                            SkScalar x, SkScalar y, const SkPaint* paint) {
-    int saveCount = canvas->getSaveCount();
-
-    if (paint && needs_layer(*paint)) {
-        SkRect bounds;
-        bounds.set(x, y,
-                   x + SkIntToScalar(picture->width()),
-                   y + SkIntToScalar(picture->height()));
-        canvas->saveLayer(&bounds, paint);
-        canvas->translate(x, y);
-    } else if (x || y) {
-        canvas->save();
-        canvas->translate(x, y);
-    }
-
-    canvas->drawPicture(*picture);
-    canvas->restoreToCount(saveCount);
-}
-
-void SkImagePrivDrawPicture(SkCanvas* canvas, SkPicture* picture,
-                            const SkRect* src,  const SkRect& dst, const SkPaint* paint) {
-    int saveCount = canvas->getSaveCount();
-
-    SkMatrix matrix;
-    SkRect   tmpSrc;
-
-    if (NULL != src) {
-        tmpSrc = *src;
-    } else {
-        tmpSrc.set(0, 0,
-                   SkIntToScalar(picture->width()),
-                   SkIntToScalar(picture->height()));
-    }
-
-    matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);
-    if (paint && needs_layer(*paint)) {
-        canvas->saveLayer(&dst, paint);
-    } else {
-        canvas->save();
-    }
-    canvas->concat(matrix);
-    if (!paint || !needs_layer(*paint)) {
-        canvas->clipRect(tmpSrc);
-    }
-
-    canvas->drawPicture(*picture);
-    canvas->restoreToCount(saveCount);
-}