update external headers

ios/include/imageio/ImageEncoder.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef IMAGE_IMAGEENCODER_H_
+#define IMAGE_IMAGEENCODER_H_
+
+#include <iosfwd>
+#include <string>
+
+#include <image/LinearImage.h>
+
+#include <utils/compiler.h>
+
+namespace image {
+
+class UTILS_PUBLIC ImageEncoder {
+public:
+    enum class Format {
+        PNG,        // 8-bit sRGB, 1 or 3 channels
+        PNG_LINEAR, // 8-bit linear RGB, 1 or 3 channels
+        HDR,        // 8-bit linear RGBE, 3 channels only
+        RGBM,       // 8-bit RGBM, as PNG, 3 channels only
+        PSD,        // 16-bit sRGB or 32-bit linear RGB, 3 channels only
+                    // Default: 16 bit
+        EXR,        // 16-bit linear RGB (half-float), 3 channels only
+                    // Default: PIZ compression
+        DDS,        // 8-bit sRGB, 1, 2 or 3 channels;
+                    // 16-bit or 32-bit linear RGB, 1, 2 or 3 channels
+                    // Default: 16 bit
+        DDS_LINEAR, // 8-bit, 16-bit or 32-bit linear RGB, 1, 2 or 3 channels
+                    // Default: 16 bit
+        RGB_10_11_11_REV,   // RGBA PNG file, but containing 11_11_10 data
+    };
+
+    // Consumes linear floating-point data, returns false if unable to encode.
+    static bool encode(std::ostream& stream, Format format, const LinearImage& image,
+            const std::string& compression, const std::string& destName);
+
+    static Format chooseFormat(const std::string& name, bool forceLinear = false);
+    static std::string chooseExtension(Format format);
+
+    class Encoder {
+    public:
+        virtual bool encode(const LinearImage& image) = 0;
+        virtual ~Encoder() = default;
+    };
+};
+
+} // namespace image
+
+#endif /* IMAGE_IMAGEENCODER_H_ */