introduce Props to surface

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 62d60da178bd790582acdf5aba3c7db92791e0bb..b2aef143d41c616d305ba726e0cdc63d0500dfb1 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -67,6 +67,38 @@ void SkCanvas::predrawNotify() {
 
 ///////////////////////////////////////////////////////////////////////////////
 
+static bool disable_lcd(const SkSurfaceProps& props) {
+    return kUnknown_SkPixelGeometry == props.pixelGeometry();
+}
+
+static bool disable_lcd(const SkPaint& paint) {
+    return paint.getRasterizer() || paint.getPathEffect() || paint.isFakeBoldText() ||
+           paint.getStyle() != SkPaint::kFill_Style ||
+           !SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode);
+}
+
+void apply_props_to_paint(const SkSurfaceProps& props, SkPaint* paint) {
+    const uint32_t propFlags = props.flags();
+    uint32_t clearMask = 0;
+    
+    if (paint->isDither() && (propFlags & SkSurfaceProps::kDisallowDither_Flag)) {
+        clearMask |= SkPaint::kDither_Flag;
+    }
+    if (paint->isAntiAlias()) {
+        if (propFlags & SkSurfaceProps::kDisallowAntiAlias_Flag) {
+            clearMask |= SkPaint::kAntiAlias_Flag;
+        } else if (paint->isLCDRenderText() && (disable_lcd(props) || disable_lcd(*paint))) {
+            clearMask |= SkPaint::kLCDRenderText_Flag;
+        }
+    }
+
+    if (clearMask) {
+        paint->setFlags(paint->getFlags() & ~clearMask);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
 /*  This is the record we keep for each SkBaseDevice that the user installs.
     The clip/matrix/proc are fields that reflect the top of the save/restore
     stack. Whenever the canvas changes, it marks a dirty flag, and then before
@@ -250,9 +282,9 @@ private:
 
 class AutoDrawLooper {
 public:
-    AutoDrawLooper(SkCanvas* canvas, const SkPaint& paint,
+    AutoDrawLooper(SkCanvas* canvas, const SkSurfaceProps& props, const SkPaint& paint,
                    bool skipLayerForImageFilter = false,
-                   const SkRect* bounds = NULL) : fOrigPaint(paint) {
+                   const SkRect* bounds = NULL) : fProps(props), fOrigPaint(paint) {
         fCanvas = canvas;
         fFilter = canvas->getDrawFilter();
         fPaint = NULL;
@@ -309,6 +341,7 @@ public:
 private:
     SkLazyPaint     fLazyPaint;
     SkCanvas*       fCanvas;
+    const SkSurfaceProps& fProps;
     const SkPaint&  fOrigPaint;
     SkDrawFilter*   fFilter;
     const SkPaint*  fPaint;
@@ -332,6 +365,7 @@ bool AutoDrawLooper::doNext(SkDrawFilter::Type drawType) {
     if (fDoClearImageFilter) {
         paint->setImageFilter(NULL);
     }
+    apply_props_to_paint(fProps, paint);
 
     if (fLooperContext && !fLooperContext->next(fCanvas, paint)) {
         fDone = true;
@@ -368,13 +402,13 @@ bool AutoDrawLooper::doNext(SkDrawFilter::Type drawType) {
 
 #define LOOPER_BEGIN_DRAWDEVICE(paint, type)                        \
     this->predrawNotify();                                          \
-    AutoDrawLooper  looper(this, paint, true);                      \
+    AutoDrawLooper  looper(this, fProps, paint, true);              \
     while (looper.next(type)) {                                     \
         SkDrawIter          iter(this);
 
 #define LOOPER_BEGIN(paint, type, bounds)                           \
     this->predrawNotify();                                          \
-    AutoDrawLooper  looper(this, paint, false, bounds);             \
+    AutoDrawLooper  looper(this, fProps, paint, false, bounds);     \
     while (looper.next(type)) {                                     \
         SkDrawIter          iter(this);
 
@@ -468,12 +502,14 @@ SkCanvas::SkCanvas(SkBaseDevice* device)
     this->init(device, kDefault_InitFlags);
 }
 
-SkCanvas::SkCanvas(const SkBitmap& bitmap)
+SkCanvas::SkCanvas(const SkBitmap& bitmap, const SkSurfaceProps* props)
     : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage))
+    , fProps(props ? *props : SkSurfaceProps())
 {
     inc_canvas();
 
-    this->init(SkNEW_ARGS(SkBitmapDevice, (bitmap)), kDefault_InitFlags)->unref();
+    SkAutoTUnref<SkBaseDevice> device(SkNEW_ARGS(SkBitmapDevice, (bitmap)));
+    this->init(device, kDefault_InitFlags);
 }
 
 SkCanvas::~SkCanvas() {