diff --git a/bench/benchmain.cpp b/bench/benchmain.cpp
index 229b80e..c2928a5 100644
--- a/bench/benchmain.cpp
+++ b/bench/benchmain.cpp
@@ -24,7 +24,7 @@
 #include "SkPicture.h"
 #include "SkString.h"
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 static void log_error(const char msg[]) { SkDebugf("%s", msg); }
 static void log_progress(const char msg[]) { SkDebugf("%s", msg); }
 #else
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index f7f918e..d22fbd6 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -723,7 +723,7 @@
                                 const SkPath& path, const SkMatrix* matrix,
                                 const SkPaint& paint);
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     /** Draw the text on path, with each character/glyph origin specified by the pos[]
         array. The origin is interpreted by the Align setting in the paint.
         @param text The text to be drawn
diff --git a/include/core/SkDevice.h b/include/core/SkDevice.h
index 488a004..6fe1c19 100644
--- a/include/core/SkDevice.h
+++ b/include/core/SkDevice.h
@@ -220,7 +220,7 @@
     virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
                                 const SkPath& path, const SkMatrix* matrix,
                                 const SkPaint& paint);
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     virtual void drawPosTextOnPath(const SkDraw& draw, const void* text, size_t len,
                                    const SkPoint pos[], const SkPaint& paint,
                                    const SkPath& path, const SkMatrix* matrix);
diff --git a/include/core/SkDraw.h b/include/core/SkDraw.h
index 2ea0740..f1e126a 100644
--- a/include/core/SkDraw.h
+++ b/include/core/SkDraw.h
@@ -55,7 +55,7 @@
                         int scalarsPerPosition, const SkPaint& paint) const;
     void    drawTextOnPath(const char text[], size_t byteLength,
                         const SkPath&, const SkMatrix*, const SkPaint&) const;
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     void    drawPosTextOnPath(const char text[], size_t byteLength,
                               const SkPoint pos[], const SkPaint& paint,
                               const SkPath& path, const SkMatrix* matrix) const;
diff --git a/include/core/SkFontHost.h b/include/core/SkFontHost.h
index c32c3d5..1b18aba 100644
--- a/include/core/SkFontHost.h
+++ b/include/core/SkFontHost.h
@@ -278,7 +278,7 @@
     static void SetSubpixelOrder(LCDOrder order);
     static LCDOrder GetSubpixelOrder();
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     ///////////////////////////////////////////////////////////////////////////
 
     /**
diff --git a/include/core/SkPaint.h b/include/core/SkPaint.h
index ee9b65c..eb5611b 100644
--- a/include/core/SkPaint.h
+++ b/include/core/SkPaint.h
@@ -818,7 +818,7 @@
     void getTextPath(const void* text, size_t length, SkScalar x, SkScalar y,
                      SkPath* path) const;
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     const SkGlyph& getUnicharMetrics(SkUnichar);
     const void* findImage(const SkGlyph&);
 
@@ -854,7 +854,7 @@
     unsigned        fStyle : 2;
     unsigned        fTextEncoding : 2;  // 3 values
     unsigned        fHinting : 2;
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     uint32_t        fGenerationID;
 #endif
 
diff --git a/include/core/SkPath.h b/include/core/SkPath.h
index 5982ea0..8eedb46 100644
--- a/include/core/SkPath.h
+++ b/include/core/SkPath.h
@@ -13,7 +13,7 @@
 #include "SkMatrix.h"
 #include "SkTDArray.h"
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 #define GEN_ID_INC              fGenerationID++
 #define GEN_ID_PTR_INC(ptr)     ptr->fGenerationID++
 #else
@@ -646,7 +646,7 @@
     void flatten(SkWriter32&) const;
     void unflatten(SkReader32&);
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     uint32_t getGenerationID() const;
 #endif
 
@@ -660,7 +660,7 @@
     uint8_t             fSegmentMask;
     mutable uint8_t     fBoundsIsDirty;
     mutable uint8_t     fConvexity;
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     uint32_t            fGenerationID;
 #endif
 
diff --git a/include/core/SkPixelRef.h b/include/core/SkPixelRef.h
index e5073af..7e21a43 100644
--- a/include/core/SkPixelRef.h
+++ b/include/core/SkPixelRef.h
@@ -124,7 +124,7 @@
     virtual Factory getFactory() const { return NULL; }
     virtual void flatten(SkFlattenableWriteBuffer&) const;
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     /**
      *  Acquire a "global" ref on this object.
      *  The default implementation just calls ref(), but subclasses can override
diff --git a/include/core/SkRegion.h b/include/core/SkRegion.h
index 7942985..bbce882 100644
--- a/include/core/SkRegion.h
+++ b/include/core/SkRegion.h
@@ -283,7 +283,7 @@
      */
     bool op(const SkRegion& rgna, const SkRegion& rgnb, Op op);
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     /** Returns a new char* containing the list of rectangles in this region
      */
     char* toString();
diff --git a/include/core/SkTRegistry.h b/include/core/SkTRegistry.h
index f655a43..34fcffd 100644
--- a/include/core/SkTRegistry.h
+++ b/include/core/SkTRegistry.h
@@ -21,7 +21,7 @@
     typedef T (*Factory)(P);
 
     SkTRegistry(Factory fact) {
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
         // work-around for double-initialization bug
         {
             SkTRegistry* reg = gHead;
diff --git a/include/core/SkThread_platform.h b/include/core/SkThread_platform.h
index 68c9c1f..2d94571 100644
--- a/include/core/SkThread_platform.h
+++ b/include/core/SkThread_platform.h
@@ -10,7 +10,7 @@
 #ifndef SkThread_platform_DEFINED
 #define SkThread_platform_DEFINED
 
-#if defined(ANDROID) && !defined(SK_BUILD_FOR_ANDROID_NDK)
+#if defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_ANDROID_NDK)
 
 #include <utils/threads.h>
 #include <utils/Atomic.h>
diff --git a/include/core/SkUtils.h b/include/core/SkUtils.h
index fb18d20..2e20107 100644
--- a/include/core/SkUtils.h
+++ b/include/core/SkUtils.h
@@ -32,7 +32,7 @@
 typedef void (*SkMemset32Proc)(uint32_t dst[], uint32_t value, int count);
 SkMemset32Proc SkMemset32GetPlatformProc();
 
-#if defined(ANDROID) && !defined(SK_BUILD_FOR_ANDROID_NDK)
+#if defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_ANDROID_NDK)
     #include "cutils/memory.h"
     
     #define sk_memset16(dst, value, count)    android_memset16(dst, value, (count) << 1)
diff --git a/include/effects/SkPorterDuff.h b/include/effects/SkPorterDuff.h
index 2d5bdb1..44d94f8 100644
--- a/include/effects/SkPorterDuff.h
+++ b/include/effects/SkPorterDuff.h
@@ -45,7 +45,7 @@
         kMultiply_Mode, //!< [Sa * Da, Sc * Dc]
         kScreen_Mode,   //!< [Sa + Da - Sa * Da, Sc + Dc - Sc * Dc]
         kAdd_Mode,      //!< Saturate(S + D)
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
         kOverlay_Mode,
 #endif
 
diff --git a/include/gpu/GrConfig.h b/include/gpu/GrConfig.h
index 1d07af1..461dee7 100644
--- a/include/gpu/GrConfig.h
+++ b/include/gpu/GrConfig.h
@@ -61,7 +61,7 @@
         #undef GR_IOS_BUILD
         #define GR_IOS_BUILD        1
 //      #error "IOS"
-    #elif (defined(ANDROID_NDK) && ANDROID_NDK) || defined(ANDROID)
+    #elif defined(SK_BUILD_FOR_ANDROID)
         #undef GR_ANDROID_BUILD
         #define GR_ANDROID_BUILD    1
 //      #error "ANDROID"
diff --git a/include/utils/SkCamera.h b/include/utils/SkCamera.h
index e82aaa1..57521b8 100644
--- a/include/utils/SkCamera.h
+++ b/include/utils/SkCamera.h
@@ -150,7 +150,7 @@
     void rotateY(SkScalar deg);
     void rotateZ(SkScalar deg);
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     void setCameraLocation(SkScalar x, SkScalar y, SkScalar z);
 #endif
 
diff --git a/include/views/SkWindow.h b/include/views/SkWindow.h
index eda928c..c72163c 100644
--- a/include/views/SkWindow.h
+++ b/include/views/SkWindow.h
@@ -108,7 +108,7 @@
     #include "SkOSWindow_Mac.h"
 #elif defined(SK_BUILD_FOR_WIN)
     #include "SkOSWindow_Win.h"
-#elif defined(ANDROID)
+#elif defined(SK_BUILD_FOR_ANDROID)
     #include "SkOSWindow_Android.h"
 #elif defined(SK_BUILD_FOR_UNIX)
   #include "SkOSWindow_Unix.h"
diff --git a/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index aeb71ad..17778fb 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -1041,7 +1041,7 @@
         SkPDFDocument doc;
         SkPDFDevice* device = static_cast<SkPDFDevice*>(fPdfCanvas->getDevice());
         doc.appendPage(device);
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
         name.prepend("/sdcard/");
 #endif
         
@@ -1787,7 +1787,7 @@
     fZoomCenterX = SkScalarHalf(this->width());
     fZoomCenterY = SkScalarHalf(this->height());
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     // FIXME: The first draw after a size change does not work on Android, so
     // we post an invalidate.
     this->postInvalDelay();
diff --git a/src/animator/SkDisplayEvent.cpp b/src/animator/SkDisplayEvent.cpp
index d295018..e3116d7 100644
--- a/src/animator/SkDisplayEvent.cpp
+++ b/src/animator/SkDisplayEvent.cpp
@@ -255,7 +255,7 @@
     return true;
 }
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 
 #include "SkMetaData.h"
 #include "SkParse.h"
diff --git a/src/core/SkBitmapProcState_filter.h b/src/core/SkBitmapProcState_filter.h
index dcb93cf..f69e17a 100644
--- a/src/core/SkBitmapProcState_filter.h
+++ b/src/core/SkBitmapProcState_filter.h
@@ -7,12 +7,6 @@
  */
 
 
-#ifdef __arm__
-#ifdef ANDROID
-    #include <machine/cpu-features.h>
-#endif
-#endif
-
 #include "SkColorPriv.h"
 
 /*
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 1640a94..ea1c467 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1617,7 +1617,7 @@
     LOOPER_END
 }
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 void SkCanvas::drawPosTextOnPath(const void* text, size_t byteLength,
                                  const SkPoint pos[], const SkPaint& paint,
                                  const SkPath& path, const SkMatrix* matrix) {
diff --git a/src/core/SkDevice.cpp b/src/core/SkDevice.cpp
index bf25ff1..a66f2a9 100644
--- a/src/core/SkDevice.cpp
+++ b/src/core/SkDevice.cpp
@@ -410,7 +410,7 @@
     draw.drawTextOnPath((const char*)text, len, path, matrix, paint);
 }
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 void SkDevice::drawPosTextOnPath(const SkDraw& draw, const void* text, size_t len,
                                      const SkPoint pos[], const SkPaint& paint,
                                      const SkPath& path, const SkMatrix* matrix) {
diff --git a/src/core/SkDraw.cpp b/src/core/SkDraw.cpp
index e7bcee5..579e29a 100644
--- a/src/core/SkDraw.cpp
+++ b/src/core/SkDraw.cpp
@@ -1973,7 +1973,7 @@
     }
 }
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 void SkDraw::drawPosTextOnPath(const char text[], size_t byteLength,
                                const SkPoint pos[], const SkPaint& paint,
                                const SkPath& path, const SkMatrix* matrix) const {
diff --git a/src/core/SkMemory_stdlib.cpp b/src/core/SkMemory_stdlib.cpp
index 88194e5..0f195e7 100644
--- a/src/core/SkMemory_stdlib.cpp
+++ b/src/core/SkMemory_stdlib.cpp
@@ -159,18 +159,12 @@
 
 void sk_throw()
 {
-#ifdef ANDROID
-    fprintf(stderr, "throwing...\n");
-#endif
     SkASSERT(!"sk_throw");
     abort();
 }
 
 void sk_out_of_memory(void)
 {
-#ifdef ANDROID
-    fprintf(stderr,"- out of memory in SGL -\n");
-#endif
     SkASSERT(!"sk_out_of_memory");
     abort();
 }
diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index aa1d7b1..ac9c68f 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -32,7 +32,7 @@
 
 #define SK_DefaultFlags         0   //(kNativeHintsText_Flag)
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 #define GEN_ID_INC                  fGenerationID++
 #define GEN_ID_INC_EVAL(expression) if (expression) { fGenerationID++; }
 #else
@@ -71,7 +71,7 @@
     fStyle      = kFill_Style;
     fTextEncoding = kUTF8_TextEncoding;
     fHinting    = kNormal_Hinting;
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     fGenerationID = 0;
 #endif
 }
@@ -125,11 +125,11 @@
     SkSafeUnref(fLooper);
     SkSafeUnref(fImageFilter);
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     uint32_t oldGenerationID = fGenerationID;
 #endif
     memcpy(this, &src, sizeof(src));
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     fGenerationID = oldGenerationID + 1;
 #endif
 
@@ -143,16 +143,16 @@
 void SkPaint::reset() {
     SkPaint init;
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     uint32_t oldGenerationID = fGenerationID;
 #endif
     *this = init;
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     fGenerationID = oldGenerationID + 1;
 #endif
 }
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 uint32_t SkPaint::getGenerationID() const {
     return fGenerationID;
 }
@@ -377,7 +377,7 @@
     *((SkGlyphCache**)context) = SkGlyphCache::DetachCache(desc);
 }
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 const SkGlyph& SkPaint::getUnicharMetrics(SkUnichar text) {
     SkGlyphCache* cache;
     descriptorProc(NULL, DetachDescProc, &cache, true);
diff --git a/src/core/SkPath.cpp b/src/core/SkPath.cpp
index cda2d4a..bdf4d27 100644
--- a/src/core/SkPath.cpp
+++ b/src/core/SkPath.cpp
@@ -93,7 +93,7 @@
     , fBoundsIsDirty(true) {
     fConvexity = kUnknown_Convexity;
     fSegmentMask = 0;
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     fGenerationID = 0;
 #endif
 }
@@ -101,7 +101,7 @@
 SkPath::SkPath(const SkPath& src) {
     SkDEBUGCODE(src.validate();)
     *this = src;
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     // the assignment operator above increments the ID so correct for that here
     fGenerationID--;
 #endif
@@ -156,7 +156,7 @@
     }
 }
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 uint32_t SkPath::getGenerationID() const {
     return fGenerationID;
 }
diff --git a/src/core/SkPicturePlayback.cpp b/src/core/SkPicturePlayback.cpp
index 60e1698..b75ae40 100644
--- a/src/core/SkPicturePlayback.cpp
+++ b/src/core/SkPicturePlayback.cpp
@@ -498,7 +498,7 @@
     SkipClipRec skipRect, skipRegion, skipPath;
 #endif
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     SkAutoMutexAcquire autoMutex(fDrawMutex);
 #endif
 
diff --git a/src/core/SkPicturePlayback.h b/src/core/SkPicturePlayback.h
index d227bc2..88f86e2 100644
--- a/src/core/SkPicturePlayback.h
+++ b/src/core/SkPicturePlayback.h
@@ -19,7 +19,7 @@
 #include "SkRegion.h"
 #include "SkPictureFlat.h"
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 #include "SkThread.h"
 #endif
 
@@ -174,7 +174,7 @@
     SkRefCntPlayback fRCPlayback;
     SkTypefacePlayback fTFPlayback;
     SkFactoryPlayback*   fFactoryPlayback;
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     SkMutex fDrawMutex;
 #endif
 };
diff --git a/src/core/SkPixelRef.cpp b/src/core/SkPixelRef.cpp
index 2fd65cf..31eccc5 100644
--- a/src/core/SkPixelRef.cpp
+++ b/src/core/SkPixelRef.cpp
@@ -159,7 +159,7 @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 void SkPixelRef::globalRef(void* data) {
     this->ref();
 }
diff --git a/src/core/SkRegion.cpp b/src/core/SkRegion.cpp
index 10b58bf..334caa8 100644
--- a/src/core/SkRegion.cpp
+++ b/src/core/SkRegion.cpp
@@ -11,10 +11,6 @@
 #include "SkTemplates.h"
 #include "SkThread.h"
 
-#ifdef ANDROID
-#include <stdio.h>
-#endif
-
 SkDEBUGCODE(int32_t gRgnAllocCounter;)
 
 /////////////////////////////////////////////////////////////////////////////////////////////////
@@ -171,7 +167,7 @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 char* SkRegion::toString()
 {
     Iterator iter(*this);
diff --git a/src/core/SkUtils.cpp b/src/core/SkUtils.cpp
index 18323cc..8b7ebf3 100644
--- a/src/core/SkUtils.cpp
+++ b/src/core/SkUtils.cpp
@@ -108,7 +108,7 @@
     }
 }
 
-#if !defined(ANDROID) || defined(SK_BUILD_FOR_ANDROID_NDK)
+#if !defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_ANDROID_NDK)
 static void sk_memset16_stub(uint16_t dst[], uint16_t value, int count) {
     SkMemset16Proc proc = SkMemset16GetPlatformProc();
     sk_memset16 = proc ? proc : sk_memset16_portable;
diff --git a/src/effects/SkBlurDrawLooper.cpp b/src/effects/SkBlurDrawLooper.cpp
index 8746f9a..5021428 100644
--- a/src/effects/SkBlurDrawLooper.cpp
+++ b/src/effects/SkBlurDrawLooper.cpp
@@ -82,7 +82,7 @@
                 fState = kDone;
                 return false;
             }
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
             SkColor blurColor;
             blurColor = fBlurColor;
             if (SkColorGetA(blurColor) == 255) {
diff --git a/src/effects/SkPorterDuff.cpp b/src/effects/SkPorterDuff.cpp
index 515a3d4..8acb345 100644
--- a/src/effects/SkPorterDuff.cpp
+++ b/src/effects/SkPorterDuff.cpp
@@ -39,7 +39,7 @@
     MAKE_PAIR(Multiply),
     MAKE_PAIR(Screen),
     { SkPorterDuff::kAdd_Mode, SkXfermode::kPlus_Mode },
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
     MAKE_PAIR(Overlay),
 #endif
 };
diff --git a/src/opts/SkBitmapProcState_opts_arm.cpp b/src/opts/SkBitmapProcState_opts_arm.cpp
index 224f754..20d62e1 100644
--- a/src/opts/SkBitmapProcState_opts_arm.cpp
+++ b/src/opts/SkBitmapProcState_opts_arm.cpp
@@ -7,10 +7,6 @@
  */
 
 
-#ifdef ANDROID
-    #include <machine/cpu-features.h>
-#endif
-
 #include "SkBitmapProcState.h"
 #include "SkColorPriv.h"
 #include "SkUtils.h"
diff --git a/src/opts/SkBlitRow_opts_arm.cpp b/src/opts/SkBlitRow_opts_arm.cpp
index d653963..f882701 100644
--- a/src/opts/SkBlitRow_opts_arm.cpp
+++ b/src/opts/SkBlitRow_opts_arm.cpp
@@ -6,10 +6,6 @@
  */
 
 
-#ifdef ANDROID
-    #include <machine/cpu-features.h>
-#endif
-
 #include "SkBlitRow.h"
 #include "SkBlitMask.h"
 #include "SkColorPriv.h"
@@ -992,7 +988,7 @@
 
 	    /* calculate 'd', which will be 0..7 */
 	    /* dbase[] is 0..7; alpha is 0..256; 16 bits suffice */
-#if ANDROID
+#if SK_BUILD_FOR_ANDROID
 	    /* SkAlpha255To256() semantic a+1 vs a+a>>7 */
 	    alpha8 = vaddw_u8(vmovl_u8(sa), vdup_n_u8(1));
 #else
diff --git a/src/utils/SkCamera.cpp b/src/utils/SkCamera.cpp
index 328f588..a387257 100644
--- a/src/utils/SkCamera.cpp
+++ b/src/utils/SkCamera.cpp
@@ -362,7 +362,7 @@
     fRec = next;
 }
 
-#ifdef ANDROID
+#ifdef SK_BUILD_FOR_ANDROID
 void Sk3DView::setCameraLocation(SkScalar x, SkScalar y, SkScalar z) {
     // the camera location is passed in inches, set in pt
     SkScalar lz = z * SkFloatToScalar(72.0f);