SkTextBlob

src/core/SkPictureRecord.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPictureRecord.h"
 #include "SkBBoxHierarchy.h"
 #include "SkDevice.h"
 #include "SkPatchUtils.h"
 #include "SkPictureStateTree.h"
 #include "SkPixelRef.h"
 #include "SkRRect.h"
+#include "SkTextBlob.h"
 #include "SkTSearch.h"
 
 #define HEAP_BLOCK_SIZE 4096
 
 // If SK_RECORD_LITERAL_PICTURES is defined, record our inputs as literally as possible.
 // Otherwise, we can be clever and record faster equivalents.  kBeClever is normally true.
 static const bool kBeClever =
 #ifdef SK_RECORD_LITERAL_PICTURES
     false;
 #else
@@ skipping 82 matching lines @@
         0,  // TRANSLATE - no paint
         0,  // NOOP - no paint
         0,  // BEGIN_GROUP - no paint
         0,  // COMMENT - no paint
         0,  // END_GROUP - no paint
         1,  // DRAWDRRECT - right after op code
         0,  // PUSH_CULL - no paint
         0,  // POP_CULL - no paint
         1,  // DRAW_PATCH - right after op code
         1,  // DRAW_PICTURE_MATRIX_PAINT - right after op code
+        1,  // DRAW_TEXT_BLOB - right after op code
     };
 
     SK_COMPILE_ASSERT(sizeof(gPaintOffsets) == LAST_DRAWTYPE_ENUM + 1,
                       need_to_be_in_sync);
     SkASSERT((unsigned)op <= (unsigned)LAST_DRAWTYPE_ENUM);
 
     int overflow = 0;
     if (0 != (opSize & ~MASK_24) || opSize == MASK_24) {
         // This op's size overflows so an extra uint32_t will be written
         // after the op code
@@ skipping 1068 matching lines @@
     size_t size = 3 * kUInt32Size + SkAlign4(byteLength) + kUInt32Size + m.writeToMemory(NULL);
     size_t initialOffset = this->addDraw(DRAW_TEXT_ON_PATH, &size);
     SkASSERT(initialOffset+getPaintOffset(DRAW_TEXT_ON_PATH, size) == fWriter.bytesWritten());
     this->addPaint(paint);
     this->addText(text, byteLength);
     this->addPath(path);
     this->addMatrix(m);
     this->validate(initialOffset, size);
 }
 
+
+void SkPictureRecord::onDrawTextBlob(const SkTextBlob* blob, const SkPoint& offset,
+                                     const SkPaint& paint) {
+    // op + paint index + chunk count + offset
+    size_t size = 3 * kUInt32Size + sizeof(SkPoint);
+    unsigned chunk_count = 0;
+
+    {
+        // Yikes -- we need to scan the chunks upfront to compute the size :(
+        // Hopefully this is going to be irrelevant soon thanks to SkRecord.
+        SkTextBlob::Iter iter(blob);
+        while (const SkTextChunk* chunk = iter.next()) {
+            chunk_count++;
+
+            // glyph count + chunk paint + flags + bounds bool
+            size += 4 * kUInt32Size;
+            if (!chunk->fBoundsDirty) {
+                size += sizeof(chunk->fBounds);
+            }
+            // glyphs
+            size += SkAlign4(chunk->fGlyphCount * sizeof(uint16_t));
+            // positions
+            size += SkAlign4(chunk->fGlyphCount * sizeof(SkScalar) * chunk->fScalarsPerPos);
+        }
+    }
+
+    size_t initialOffset = this->addDraw(DRAW_TEXT_BLOB, &size);
+    SkASSERT(initialOffset+getPaintOffset(DRAW_TEXT_ON_PATH, size) == fWriter.bytesWritten());
+    this->addPaint(paint);
+    this->addInt(chunk_count);
+    this->addPoint(offset);
+
+    SkTextBlob::Iter iter(blob);
+    while (const SkTextChunk* chunk = iter.next()) {
+        this->addInt(SkToInt(chunk->fGlyphCount));
+        this->addPaint(chunk->fFont);
+        this->addInt(chunk->fScalarsPerPos);
+        this->addRectPtr(chunk->fBoundsDirty ? NULL : &chunk->fBounds);
+        fWriter.writePad(chunk->fGlyphs, chunk->fGlyphCount * sizeof(uint16_t));
+        if (chunk->fScalarsPerPos > 0) {
+            SkASSERT(NULL != chunk->fPos);
+            fWriter.writePad(chunk->fPos, chunk->fGlyphCount * sizeof(SkScalar) * chunk->fScalarsPerPos);
+        }
+    }
+
+    this->validate(initialOffset, size);
+}
+
 void SkPictureRecord::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix,
                                     const SkPaint* paint) {
     // op + picture index
     size_t size = 2 * kUInt32Size;
     size_t initialOffset;
 
     if (NULL == matrix && NULL == paint) {
         initialOffset = this->addDraw(DRAW_PICTURE, &size);
         this->addPicture(picture);
     } else {
@@ skipping 298 matching lines @@
 }
 
 void SkPictureRecord::addText(const void* text, size_t byteLength) {
     fContentInfo.onDrawText();
     addInt(SkToInt(byteLength));
     fWriter.writePad(text, byteLength);
 }
 
 ///////////////////////////////////////////////////////////////////////////////