1 files changed, 109 insertions, 0 deletions
diff --git a/src/base/pngwriter.hh b/src/base/pngwriter.hh
new file mode 100644
index 000000000..984f2f62f
--- /dev/null
+++ b/src/base/pngwriter.hh
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2017 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Giacomo Travaglini
+ */
+
+/**
+ * @file Declaration of a class that writes a frame buffer to a png
+ */
+
+#ifndef __BASE_PNG_HH__
+#define __BASE_PNG_HH__
+
+#include "base/compiler.hh"
+#include "base/framebuffer.hh"
+#include "base/imgwriter.hh"
+
+/** Image writer implementing support for PNG */
+class PngWriter : public ImgWriter
+{
+  public:
+    /**
+     * Create a png that takes data in a given mode & size and
+     * outputs to an ostream.
+     */
+    PngWriter(const FrameBuffer *_fb)
+      : ImgWriter(_fb)
+    {}
+
+    ~PngWriter() {};
+
+    /**
+     * Return Image format as a string
+     *
+     * @return img extension (e.g. .png for Png)
+     */
+    const char* getImgExtension() const override
+    { return _imgExtension; }
+
+    /**
+     * Write the frame buffer data into the provided ostream
+     *
+     * @param png stream to write to
+     */
+    void write(std::ostream &png) const override;
+  private:
+    /** Png Pixel type: not containing padding */
+    struct PngPixel24 {
+        PngPixel24 &operator=(const Pixel &rhs) {
+            red = rhs.red;
+            green = rhs.green;
+            blue = rhs.blue;
+
+            return *this;
+        }
+        uint8_t red;
+        uint8_t green;
+        uint8_t blue;
+    } M5_ATTR_PACKED;
+
+    /**
+     * Handle to resources used by libpng:
+     *   - png_struct: Structure holding write informations
+     *   - png_info  : Structure holding image informations
+     *
+     * The class is automatically taking care of struct
+     * allocation/deallocation
+     */
+    struct PngStructHandle;
+
+    typedef PngPixel24 PixelType;
+
+    static const char* _imgExtension;
+};
+
+#endif // __BASE_PNG_HH__