Implement SkPicture::hasText() for SkRecord backend.

src/core/SkPicture.cpp

 
 /*
  * Copyright 2007 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 "SkPictureFlat.h"
@@ skipping 153 matching lines @@
     template <typename T>
     SK_WHEN(!HasMember_paint<T>, void) operator()(const T& op) { /* do nothing */ }
 
 
     int numPaintWithPathEffectUses;
     int numFastPathDashEffects;
     int numAAConcavePaths;
     int numAAHairlineConcavePaths;
 };
 
+// SkRecord visitor to find recorded text.
+struct TextHunter {
+    // All ops with text have that text as a char array member named "text".
+    SK_CREATE_MEMBER_DETECTOR(text);
+    template <typename T> SK_WHEN(HasMember_text<T>,  bool) operator()(const T&) { return true;  }
+    template <typename T> SK_WHEN(!HasMember_text<T>, bool) operator()(const T&) { return false; }
+};
+
 } // namespace
 
-void SkPicture::Analysis::init(const SkRecord& record) {
-
+SkPicture::Analysis::Analysis(const SkRecord& record) {
     fWillPlaybackBitmaps = WillPlaybackBitmaps(record);
 
     PathCounter counter;
     for (unsigned i = 0; i < record.count(); i++) {
         record.visit<void>(i, counter);
     }
     fNumPaintWithPathEffectUses = counter.numPaintWithPathEffectUses;
-    fNumFastPathDashEffects = counter.numFastPathDashEffects;
-    fNumAAConcavePaths = counter.numAAConcavePaths;
-    fNumAAHairlineConcavePaths = counter.numAAHairlineConcavePaths;
+    fNumFastPathDashEffects     = counter.numFastPathDashEffects;
+    fNumAAConcavePaths          = counter.numAAConcavePaths;
+    fNumAAHairlineConcavePaths  = counter.numAAHairlineConcavePaths;
+
+    fHasText = false;
+    TextHunter text;
+    for (unsigned i = 0; i < record.count(); i++) {
+        if (record.visit<bool>(i, text)) {
+            fHasText = true;
+            break;
+        }
+    }
 }
 
 bool SkPicture::Analysis::suitableForGpuRasterization(const char** reason,
                                                       int sampleCount) const {
     // TODO: the heuristic used here needs to be refined
     static const int kNumPaintWithPathEffectsUsesTol = 1;
     static const int kNumAAConcavePathsTol = 5;
 
     int numNonDashedPathEffects = fNumPaintWithPathEffectUses -
                                   fNumFastPathDashEffects;
@@ skipping 370 matching lines @@
         if (NULL != reason) {
             *reason = "Missing internal data.";
         }
         return false;
     }
 
     return fData->suitableForGpuRasterization(context, reason);
 }
 #endif
 
-// fRecord TODO
+// fRecord OK
 bool SkPicture::hasText() const {
-    return fData.get() && fData->hasText();
+    if (fRecord.get()) {
+        return fAnalysis.fHasText;
+    }
+    if (fData.get()) {
+        return fData->hasText();
+    }
+    SkFAIL("Unreachable");
+    return false;
 }
 
 // fRecord OK
 bool SkPicture::willPlayBackBitmaps() const {
     if (fRecord.get()) {
         return fAnalysis.fWillPlaybackBitmaps;
     }
-    if (!fData.get()) {
-        return false;
+    if (fData.get()) {
+        return fData->containsBitmaps();
     }
-    return fData->containsBitmaps();
+    SkFAIL("Unreachable");
+    return false;
 }
 
 // fRecord OK
 static int32_t next_picture_generation_id() {
     static int32_t  gPictureGenerationID = 0;
     // do a loop in case our global wraps around, as we never want to
     // return a 0
     int32_t genID;
     do {
         genID = sk_atomic_inc(&gPictureGenerationID) + 1;
     } while (SK_InvalidGenID == genID);
     return genID;
 }
 
 // fRecord OK
 uint32_t SkPicture::uniqueID() const {
     if (SK_InvalidGenID == fUniqueID) {
         fUniqueID = next_picture_generation_id();
     }
     return fUniqueID;
 }
 
 // fRecord OK
 SkPicture::SkPicture(int width, int height, SkRecord* record, SkBBoxHierarchy* bbh)
     : fWidth(width)
     , fHeight(height)
     , fRecord(record)
     , fBBH(SkSafeRef(bbh))
-    , fAnalysis() {
+    , fAnalysis(*record) {
     // TODO: delay as much of this work until just before first playback?
-
-    const_cast<Analysis*>(&fAnalysis)->init(*record);
     if (fBBH.get()) {
         SkRecordFillBounds(*record, fBBH.get());
     }
     this->needsNewGenID();
 }
 
 // Note that we are assuming that this entry point will only be called from
 // one thread. Currently the only client of this method is
 // SkGpuDevice::EXPERIMENTAL_optimize which should be only called from a single
 // thread.
@@ skipping 15 matching lines @@
 int SkPicture::approximateOpCount() const {
     SkASSERT(fRecord.get() || fData.get());
     if (fRecord.get()) {
         return fRecord->count();
     }
     if (fData.get()) {
         return fData->opCount();
     }
     return 0;
 }