Expose drawTextBlob to devices.

src/core/SkCanvas.cpp

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkCanvas.h"
 #include "SkCanvasPriv.h"
 #include "SkBitmapDevice.h"
 #include "SkDeviceImageFilterProxy.h"
 #include "SkDraw.h"
 #include "SkDrawFilter.h"
 #include "SkDrawLooper.h"
 #include "SkMetaData.h"
 #include "SkPathOps.h"
 #include "SkPatchUtils.h"
 #include "SkPicture.h"
 #include "SkRasterClip.h"
 #include "SkRRect.h"
 #include "SkSmallAllocator.h"
 #include "SkSurface_Base.h"
 #include "SkTemplates.h"
-#include "SkTextBlob.h"
 #include "SkTextFormatParams.h"
 #include "SkTLazy.h"
 #include "SkUtils.h"
 
 #if SK_SUPPORT_GPU
 #include "GrRenderTarget.h"
 #endif
 
 // experimental for faster tiled drawing...
 //#define SK_ENABLE_CLIP_QUICKREJECT
@@ skipping 2175 matching lines @@
     while (iter.next()) {
         iter.fDevice->drawTextOnPath(iter, text, byteLength, path,
                                      matrix, looper.paint());
     }
 
     LOOPER_END
 }
 
 void SkCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
                               const SkPaint& paint) {
-    SkASSERT(blob);
+    LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL)
 
-    // FIXME: dispatch to the device instead
-
-    if (x || y) {
-        this->translate(x, y);
+    while (iter.next()) {
+        SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint());
+        iter.fDevice->drawTextBlob(iter, blob, x, y, dfp.paint());
     }
 
-    SkPaint runPaint = paint;
-    SkTextBlob::RunIterator it(blob);
-    while (!it.done()) {
-        size_t textLen = it.glyphCount() * sizeof(uint16_t);
-        const SkPoint& offset = it.offset();
-        // applyFontToPaint() always overwrites the exact same attributes,
-        // so it is safe to not re-seed the paint.
-        it.applyFontToPaint(&runPaint);
-
-        switch (it.positioning()) {
-        case SkTextBlob::kDefault_Positioning:
-            this->drawText(it.glyphs(), textLen, offset.x(), offset.y(), runPaint);
-            break;
-        case SkTextBlob::kHorizontal_Positioning:
-            this->drawPosTextH(it.glyphs(), textLen, it.pos(), offset.y(), runPaint);
-            break;
-        case SkTextBlob::kFull_Positioning:
-            this->drawPosText(it.glyphs(), textLen, (const SkPoint*)it.pos(), runPaint);
-            break;
-        default:
-            SkFAIL("unhandled positioning mode");
-        }
-
-        it.next();
-    }
-
-    if (x || y) {
-        this->translate(-x, -y);
-    }
+    LOOPER_END
 }
 
 // These will become non-virtual, so they always call the (virtual) onDraw... method
 void SkCanvas::drawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
                         const SkPaint& paint) {
     this->onDrawText(text, byteLength, x, y, paint);
 }
 void SkCanvas::drawPosText(const void* text, size_t byteLength, const SkPoint pos[],
                            const SkPaint& paint) {
     this->onDrawPosText(text, byteLength, pos, paint);
@@ skipping 326 matching lines @@
     }
 
     if (NULL != matrix) {
         canvas->concat(*matrix);
     }
 }
 
 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() {
     fCanvas->restoreToCount(fSaveCount);
 }