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Unified Diff: include/core/SkSurfaceProps.h

Issue 588143004: Introduce Props to surface (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: remove RenderTargetFlags from legacy mode Created 6 years, 3 months ago
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Index: include/core/SkSurfaceProps.h
diff --git a/include/core/SkSurfaceProps.h b/include/core/SkSurfaceProps.h
new file mode 100644
index 0000000000000000000000000000000000000000..015447391437374687cc6c00bed2300505bb81d2
--- /dev/null
+++ b/include/core/SkSurfaceProps.h
@@ -0,0 +1,80 @@
+/*
+ * 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 SkSurfaceProps_DEFINED
+#define SkSurfaceProps_DEFINED
+
+#include "SkTypes.h"
+
+/**
+ * Description of how the LCD strips are arranged for each pixel. If this is unknown, or the
+ * pixels are meant to be "portable" and/or transformed before showing (e.g. rotated, scaled)
+ * then use kUnknown_SkPixelGeometry.
+ */
+enum SkPixelGeometry {
+ kUnknown_SkPixelGeometry,
+ kRGB_H_SkPixelGeometry,
+ kBGR_H_SkPixelGeometry,
+ kRGB_V_SkPixelGeometry,
+ kBGR_V_SkPixelGeometry,
+};
+
+// Returns true iff geo is a known geometry and is RGB.
+static inline bool SkPixelGeometryIsRGB(SkPixelGeometry geo) {
+ return kRGB_H_SkPixelGeometry == geo || kRGB_V_SkPixelGeometry == geo;
+}
+
+// Returns true iff geo is a known geometry and is BGR.
+static inline bool SkPixelGeometryIsBGR(SkPixelGeometry geo) {
+ return kBGR_H_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo;
+}
+
+// Returns true iff geo is a known geometry and is horizontal.
+static inline bool SkPixelGeometryIsH(SkPixelGeometry geo) {
+ return kRGB_H_SkPixelGeometry == geo || kBGR_H_SkPixelGeometry == geo;
+}
+
+// Returns true iff geo is a known geometry and is vertical.
+static inline bool SkPixelGeometryIsV(SkPixelGeometry geo) {
+ return kRGB_V_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo;
+}
+
+/**
+ * Describes properties and constraints of a given SkSurface. The rendering engine can parse these
+ * during drawing, and can sometimes optimize its performance (e.g. disabling an expensive
+ * feature).
+ */
+class SkSurfaceProps {
+public:
+ enum Flags {
+ kDisallowAntiAlias_Flag = 1 << 0,
+ kDisallowDither_Flag = 1 << 1,
+ kUseDistanceFieldFonts_Flag = 1 << 2,
+ };
+ SkSurfaceProps(uint32_t flags, SkPixelGeometry);
+
+ enum InitType {
+ kLegacyFontHost_InitType
+ };
+ SkSurfaceProps(InitType);
+ SkSurfaceProps(uint32_t flags, InitType);
+
+ uint32_t flags() const { return fFlags; }
+ SkPixelGeometry pixelGeometry() const { return fPixelGeometry; }
+
+ bool isDisallowAA() const { return SkToBool(fFlags & kDisallowAntiAlias_Flag); }
+ bool isDisallowDither() const { return SkToBool(fFlags & kDisallowDither_Flag); }
+ bool isUseDistanceFieldFonts() const { return SkToBool(fFlags & kUseDistanceFieldFonts_Flag); }
+
+private:
+ SkSurfaceProps();
+
+ uint32_t fFlags;
+ SkPixelGeometry fPixelGeometry;
+};
+
+#endif
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