SkTextBlob

samplecode/SampleText.cpp

Index: samplecode/SampleText.cpp
diff --git a/samplecode/SampleText.cpp b/samplecode/SampleText.cpp
index 17456b2ee988e6cbfca5d02d6caa1fba434db5a3..c028b32bfbbea3d427829803efe3747f83743669 100644
--- a/samplecode/SampleText.cpp
+++ b/samplecode/SampleText.cpp
@@ -20,6 +20,7 @@
 #include "SkUtils.h"
 #include "SkColorPriv.h"
 #include "SkColorFilter.h"
+#include "SkTextBlob.h"
 #include "SkTime.h"
 #include "SkTypeface.h"
 #include "SkXfermode.h"
@@ -76,16 +77,18 @@ static const struct {
 static void DrawTheText(SkCanvas* canvas, const char text[], size_t length, SkScalar x, SkScalar y,
                         const SkPaint& paint, SkScalar clickX) {
     SkPaint p(paint);
+    SkPoint pts[1000];
+    SkScalar xPos[1000];
+    SkASSERT(length <= SK_ARRAY_COUNT(pts));
 
 #if 0
     canvas->drawText(text, length, x, y, paint);
 #else
     {
-        SkPoint pts[1000];
         SkScalar xpos = x;
-        SkASSERT(length <= SK_ARRAY_COUNT(pts));
         for (size_t i = 0; i < length; i++) {
             pts[i].set(xpos, y), xpos += paint.getTextSize();
+            xPos[i] = pts[i].x();
         }
         canvas->drawPosText(text, length, pts, paint);
     }
@@ -103,6 +106,35 @@ static void DrawTheText(SkCanvas* canvas, const char text[], size_t length, SkSc
         canvas->drawText(text, length, x, y, p);
     }
 #endif
+
+
+    uint16_t glyphs[1000];
+    SkASSERT(length <= SK_ARRAY_COUNT(glyphs));
+    int glyphCount = paint.textToGlyphs(text, length, glyphs);
+    SkPaint glyphPaint = paint;
+    glyphPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
+
+    SkTextBlobBuilder blobBuilder;
+    SkTextBlobBuilder::RunBuffer posRun = blobBuilder.allocRun(glyphPaint, glyphCount);
+    memcpy(posRun.glyphs, glyphs, glyphCount * sizeof(uint16_t));
+    memcpy(posRun.pos, pts, glyphCount * sizeof(SkScalar) * 2);
+    SkAutoTUnref<const SkTextBlob> posBlob(blobBuilder.build());
+    canvas->drawTextBlob(posBlob, 0, 400, glyphPaint);
+
+    glyphPaint.setSubpixelText(true);
+    uint16_t* defaultRun = blobBuilder.allocRun(glyphPaint, glyphCount,
+                                                SkPoint::Make(0, 0));
+    memcpy(defaultRun, glyphs, glyphCount * sizeof(uint16_t));
+    SkAutoTUnref<const SkTextBlob> blob(blobBuilder.build());
+    canvas->drawTextBlob(blob, 180, 400 + y, glyphPaint);
+
+    glyphPaint.setSubpixelText(false);
+    glyphPaint.setLinearText(true);
+    SkTextBlobBuilder::RunBuffer hPosRun = blobBuilder.allocRun(glyphPaint, glyphCount, 0, NULL);
+    memcpy(hPosRun.glyphs, glyphs, glyphCount * sizeof(uint16_t));
+    memcpy(hPosRun.pos, xPos, glyphCount * sizeof(SkScalar));
+    SkAutoTUnref<const SkTextBlob> hPosBlob(blobBuilder.build());
+    canvas->drawTextBlob(hPosBlob, 360, 400 + y, glyphPaint);
 }
 
 class TextSpeedView : public SampleView {