SkTextBlob

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 2185 matching lines @@
     LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL)
 
     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);
+
+    // FIXME: dispatch to the device instead
+
+    if (x || y) {
+        this->translate(x, y);
+    }
+
+    SkTextBlob::RunIterator it(blob);
+    while (!it.done()) {
+        size_t textLen = it.glyphCount() * sizeof(uint16_t);
+        switch (it.positioning()) {
+        case SkTextBlob::kDefault_Positioning:
+            this->drawText(it.glyphs(), textLen, 0, 0, paint);
+            break;
+        case SkTextBlob::kHorizontal_Positioning:
+            this->drawPosTextH(it.glyphs(), textLen, it.pos(), 0, paint);
+            break;
+        case SkTextBlob::kFull_Positioning:
+            this->drawPosText(it.glyphs(), textLen, (const SkPoint*)it.pos(), paint);
+            break;
+        default:
+            SkFAIL("unhandled positioning mode");
+        }
+
+        it.next();
+    }
+
+    if (x || y) {
+        this->translate(-x, -y);
+    }
+}
+
 // 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);
 }
 void SkCanvas::drawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
                             SkScalar constY, const SkPaint& paint) {
     this->onDrawPosTextH(text, byteLength, xpos, constY, paint);
 }
 void SkCanvas::drawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
                               const SkMatrix* matrix, const SkPaint& paint) {
     this->onDrawTextOnPath(text, byteLength, path, matrix, paint);
 }
+void SkCanvas::drawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
+                            const SkPaint& paint) {
+    if (NULL != blob) {
+        this->onDrawTextBlob(blob, x, y, paint);
+    }
+}
 
 void SkCanvas::drawVertices(VertexMode vmode, int vertexCount,
                             const SkPoint verts[], const SkPoint texs[],
                             const SkColor colors[], SkXfermode* xmode,
                             const uint16_t indices[], int indexCount,
                             const SkPaint& paint) {
     LOOPER_BEGIN(paint, SkDrawFilter::kPath_Type, NULL)
 
     while (iter.next()) {
         iter.fDevice->drawVertices(iter, vmode, vertexCount, verts, texs,
@@ skipping 301 matching lines @@
     }
 
     if (NULL != matrix) {
         canvas->concat(*matrix);
     }
 }
 
 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() {
     fCanvas->restoreToCount(fSaveCount);
 }