introduce Props to surface

src/core/SkDeviceProperties.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
 #ifndef SkDeviceProperties_DEFINED
 #define SkDeviceProperties_DEFINED
 
-//TODO: get everyone to stop using SkFontLCDConfig::SetSubpixel* and remove this import.
-#include "SkFontLCDConfig.h"
+#include "SkSurfacePriv.h"
 
 struct SkDeviceProperties {
-    struct Geometry {
-        /** The orientation of the pixel specifies the interpretation of the
-        *  layout. If the orientation is horizontal, the layout is interpreted as
-        *  left to right. It the orientation is vertical, the layout is
-        *  interpreted top to bottom (rotated 90deg cw from horizontal).
-        */
-        enum Orientation {
-            kUnknown_Orientation      = 0x0,
-            kKnown_Orientation        = 0x2,
+    enum InitType {
+        kLegacyLCD_InitType
+    };
+    SkDeviceProperties(InitType) : fPixelGeometry(SkSurfacePropsDefaultPixelGeometry()) {}
+    SkDeviceProperties(SkPixelGeometry geo) : fPixelGeometry(geo) {}
 
-            kHorizontal_Orientation   = 0x2,  //!< this is the default
-            kVertical_Orientation     = 0x3,
+    SkPixelGeometry fPixelGeometry;
 
-            kOrientationMask          = 0x3,
-        };
-
-        /** The layout of the pixel specifies its subpixel geometry.
-        *
-        *  kUnknown_Layout means that the subpixel elements are not spatially
-        *  separated in any known or usable fashion.
-        */
-        enum Layout {
-            kUnknown_Layout   = 0x0,
-            kKnown_Layout     = 0x8,
-
-            kRGB_Layout       = 0x8,  //!< this is the default
-            kBGR_Layout       = 0xC,
-
-            kLayoutMask       = 0xC,
-        };
-
-        Orientation getOrientation() {
-            return static_cast<Orientation>(fGeometry & kOrientationMask);
-        }
-        Layout getLayout() {
-            return static_cast<Layout>(fGeometry & kLayoutMask);
-        }
-
-        bool isOrientationKnown() {
-            return SkToBool(fGeometry & kKnown_Orientation);
-        }
-        bool isLayoutKnown() {
-            return SkToBool(fGeometry & kKnown_Layout);
-        }
-
-    private:
-        //TODO: get everyone to stop using SkFontLCDConfig::SetSubpixel* and replace these calls with constants.
-        static Orientation fromOldOrientation(SkFontLCDConfig::LCDOrientation orientation) {
-            switch (orientation) {
-            case SkFontLCDConfig::kHorizontal_LCDOrientation: return kHorizontal_Orientation;
-            case SkFontLCDConfig::kVertical_LCDOrientation: return kVertical_Orientation;
-            default: return kUnknown_Orientation;
-            }
-        }
-        static Layout fromOldLayout(SkFontLCDConfig::LCDOrder order) {
-            switch (order) {
-            case SkFontLCDConfig::kRGB_LCDOrder: return kRGB_Layout;
-            case SkFontLCDConfig::kBGR_LCDOrder: return kBGR_Layout;
-            default: return kUnknown_Layout;
-            }
-        }
-    public:
-        static Geometry MakeDefault() {
-            Orientation orientation = fromOldOrientation(SkFontLCDConfig::GetSubpixelOrientation()); //kHorizontal_Orientation
-            Layout layout = fromOldLayout(SkFontLCDConfig::GetSubpixelOrder()); //kRGB_Layout
-            Geometry ret = { SkToU8(orientation | layout) };
-            return ret;
-        }
-
-        static Geometry Make(Orientation orientation, Layout layout) {
-            Geometry ret = { SkToU8(orientation | layout) };
-            return ret;
-        }
-
-        uint8_t fGeometry;
-    };
-
-    static SkDeviceProperties MakeDefault() {
-        SkDeviceProperties ret = { Geometry::MakeDefault(), SK_GAMMA_EXPONENT };
-        return ret;
-    }
-
-    static SkDeviceProperties Make(Geometry geometry, SkScalar gamma) {
-        SkDeviceProperties ret = { geometry, gamma };
-        return ret;
-    }
-
-    /** Each pixel of an image will have some number of channels.
-     *  Can the layout of those channels be exploited? */
-    Geometry fGeometry;
-
-    /** Represents the color space of the image. This is a woefully inadequate beginning. */
-    SkScalar fGamma;
+    // read-only attribute -- until we actually store a value (future CL)
+    float getGamma() const { return SK_GAMMA_EXPONENT; }
 };
 
 #endif