Revert "change SkColorTable to be immutable"

samplecode/SampleDitherBitmap.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 "SampleCode.h"
 #include "SkColorPriv.h"
 #include "SkGradientShader.h"
@@ skipping 36 matching lines @@
     path.close();
 
     SkIRect bounds;
     path.getBounds().round(&bounds);
     SkRegion clip(bounds);
     bool result = region.setPath(path, clip); // <-- !! DOWN !!
     SkDebugf("----- result %d\n", result);
 }
 
 static SkBitmap make_bitmap() {
-    SkPMColor c[256];
+    SkBitmap bm;
+    SkColorTable* ctable = new SkColorTable(256);
+
+    SkPMColor* c = ctable->lockColors();
     for (int i = 0; i < 256; i++) {
         c[i] = SkPackARGB32(0xFF, i, 0, 0);
     }
-    SkColorTable* ctable = new SkColorTable(c, 256, kOpaque_SkAlphaType);
-
-    SkBitmap bm;
+    ctable->unlockColors(true);
     bm.setConfig(SkBitmap::kIndex8_Config, 256, 32);
     bm.allocPixels(ctable);
     ctable->unref();
 
     bm.lockPixels();
     for (int y = 0; y < bm.height(); y++) {
         uint8_t* p = bm.getAddr8(0, y);
         for (int x = 0; x < 256; x++) {
             p[x] = x;
         }
@@ skipping 20 matching lines @@
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "DitherBitmap");
             return true;
         }
         return this->INHERITED::onQuery(evt);
     }
 
     static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) {
         SkAutoLockPixels alp(*bm);  // needed for ctable
         bm->setIsOpaque(isOpaque);
-#if 0
         SkColorTable* ctable = bm->getColorTable();
         if (ctable) {
-            if (ctable->isOpaque() != isOpaque) {
-                // how do we change a colortable? don't want to
-            }
+            ctable->setIsOpaque(isOpaque);
         }
-#endif
     }
 
     static void draw2(SkCanvas* canvas, const SkBitmap& bm) {
         SkPaint paint;
         SkBitmap bitmap(bm);
 
         setBitmapOpaque(&bitmap, false);
         paint.setDither(false);
         canvas->drawBitmap(bitmap, 0, 0, &paint);
         paint.setDither(true);
@@ skipping 19 matching lines @@
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new DitherBitmapView; }
 static SkViewRegister reg(MyFactory);