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-rw-r--r--image/encoders/png/nsPNGEncoder.h79
1 files changed, 79 insertions, 0 deletions
diff --git a/image/encoders/png/nsPNGEncoder.h b/image/encoders/png/nsPNGEncoder.h
new file mode 100644
index 0000000000..76d695ccfa
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+++ b/image/encoders/png/nsPNGEncoder.h
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_image_encoders_png_nsPNGEncoder_h
+#define mozilla_image_encoders_png_nsPNGEncoder_h
+
+#include <png.h>
+
+#include "imgIEncoder.h"
+#include "nsCOMPtr.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ReentrantMonitor.h"
+
+#define NS_PNGENCODER_CID \
+ { /* 38d1592e-b81e-432b-86f8-471878bbfe07 */ \
+ 0x38d1592e, 0xb81e, 0x432b, { \
+ 0x86, 0xf8, 0x47, 0x18, 0x78, 0xbb, 0xfe, 0x07 \
+ } \
+ }
+
+// Provides PNG encoding functionality. Use InitFromData() to do the
+// encoding. See that function definition for encoding options.
+
+class nsPNGEncoder final : public imgIEncoder {
+ typedef mozilla::ReentrantMonitor ReentrantMonitor;
+
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_IMGIENCODER
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+
+ nsPNGEncoder();
+
+ protected:
+ ~nsPNGEncoder();
+ nsresult ParseOptions(const nsAString& aOptions, bool* useTransparency,
+ bool* skipFirstFrame, uint32_t* numAnimatedFrames,
+ uint32_t* numIterations, int* zlibLevel, int* filters,
+ uint32_t* frameDispose, uint32_t* frameBlend,
+ uint32_t* frameDelay, uint32_t* offsetX,
+ uint32_t* offsetY);
+ void ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
+ uint32_t aPixelWidth, bool aUseTransparency);
+ void StripAlpha(const uint8_t* aSrc, uint8_t* aDest, uint32_t aPixelWidth);
+ static void WarningCallback(png_structp png_ptr, png_const_charp warning_msg);
+ static void ErrorCallback(png_structp png_ptr, png_const_charp error_msg);
+ static void WriteCallback(png_structp png, png_bytep data, png_size_t size);
+ void NullOutImageBuffer();
+ void NotifyListener();
+
+ png_struct* mPNG;
+ png_info* mPNGinfo;
+
+ bool mIsAnimation;
+ bool mFinished;
+
+ // image buffer
+ uint8_t* mImageBuffer;
+ uint32_t mImageBufferSize;
+ uint32_t mImageBufferUsed;
+
+ uint32_t mImageBufferReadPoint;
+
+ nsCOMPtr<nsIInputStreamCallback> mCallback;
+ nsCOMPtr<nsIEventTarget> mCallbackTarget;
+ uint32_t mNotifyThreshold;
+
+ // nsPNGEncoder is designed to allow one thread to pump data into it while
+ // another reads from it. We lock to ensure that the buffer remains
+ // append-only while we read from it (that it is not realloced) and to
+ // ensure that only one thread dispatches a callback for each call to
+ // AsyncWait.
+ ReentrantMonitor mReentrantMonitor MOZ_UNANNOTATED;
+};
+#endif // mozilla_image_encoders_png_nsPNGEncoder_h