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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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+/* -*- 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_bmp_nsBMPEncoder_h
+#define mozilla_image_encoders_bmp_nsBMPEncoder_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ReentrantMonitor.h"
+#include "mozilla/UniquePtr.h"
+
+#include "imgIEncoder.h"
+#include "BMPHeaders.h"
+
+#include "nsCOMPtr.h"
+
+#define NS_BMPENCODER_CID \
+{ /* 13a5320c-4c91-4FA4-bd16-b081a3ba8c0b */ \
+ 0x13a5320c, \
+ 0x4c91, \
+ 0x4fa4, \
+ {0xbd, 0x16, 0xb0, 0x81, 0xa3, 0Xba, 0x8c, 0x0b} \
+}
+
+namespace mozilla {
+namespace image {
+namespace bmp {
+
+struct FileHeader {
+ char signature[2]; // String "BM".
+ uint32_t filesize; // File size.
+ int32_t reserved; // Zero.
+ uint32_t dataoffset; // Offset to raster data.
+};
+
+struct XYZ {
+ int32_t x, y, z;
+};
+
+struct XYZTriple {
+ XYZ r, g, b;
+};
+
+struct V5InfoHeader {
+ uint32_t bihsize; // Header size
+ int32_t width; // Uint16 in OS/2 BMPs
+ int32_t height; // Uint16 in OS/2 BMPs
+ uint16_t planes; // =1
+ uint16_t bpp; // Bits per pixel.
+ uint32_t compression; // See Compression for valid values
+ uint32_t image_size; // (compressed) image size. Can be 0 if
+ // compression==0
+ uint32_t xppm; // Pixels per meter, horizontal
+ uint32_t yppm; // Pixels per meter, vertical
+ uint32_t colors; // Used Colors
+ uint32_t important_colors; // Number of important colors. 0=all
+ // The rest of the header is not available in WIN_V3 BMP Files
+ uint32_t red_mask; // Bits used for red component
+ uint32_t green_mask; // Bits used for green component
+ uint32_t blue_mask; // Bits used for blue component
+ uint32_t alpha_mask; // Bits used for alpha component
+ uint32_t color_space; // 0x73524742=LCS_sRGB ...
+ // These members are unused unless color_space == LCS_CALIBRATED_RGB
+ XYZTriple white_point; // Logical white point
+ uint32_t gamma_red; // Red gamma component
+ uint32_t gamma_green; // Green gamma component
+ uint32_t gamma_blue; // Blue gamma component
+ uint32_t intent; // Rendering intent
+ // These members are unused unless color_space == LCS_PROFILE_*
+ uint32_t profile_offset; // Offset to profile data in bytes
+ uint32_t profile_size; // Size of profile data in bytes
+ uint32_t reserved; // =0
+
+ static const uint32_t COLOR_SPACE_LCS_SRGB = 0x73524742;
+};
+
+} // namespace bmp
+} // namespace image
+} // namespace mozilla
+
+// Provides BMP encoding functionality. Use InitFromData() to do the
+// encoding. See that function definition for encoding options.
+
+class nsBMPEncoder final : public imgIEncoder
+{
+ typedef mozilla::ReentrantMonitor ReentrantMonitor;
+public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_IMGIENCODER
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+
+ nsBMPEncoder();
+
+protected:
+ ~nsBMPEncoder();
+
+ enum Version
+ {
+ VERSION_3 = 3,
+ VERSION_5 = 5
+ };
+
+ // See InitData in the cpp for valid parse options
+ nsresult ParseOptions(const nsAString& aOptions, Version& aVersionOut,
+ uint16_t& aBppOut);
+ // Obtains data with no alpha in machine-independent byte order
+ void ConvertHostARGBRow(const uint8_t* aSrc,
+ const mozilla::UniquePtr<uint8_t[]>& aDest,
+ uint32_t aPixelWidth);
+ // Thread safe notify listener
+ void NotifyListener();
+
+ // Initializes the bitmap file header member mBMPFileHeader
+ nsresult InitFileHeader(Version aVersion, uint16_t aBPP, uint32_t aWidth,
+ uint32_t aHeight);
+ // Initializes the bitmap info header member mBMPInfoHeader
+ nsresult InitInfoHeader(Version aVersion, uint16_t aBPP, uint32_t aWidth,
+ uint32_t aHeight);
+
+ // Encodes the bitmap file header member mBMPFileHeader
+ void EncodeFileHeader();
+ // Encodes the bitmap info header member mBMPInfoHeader
+ void EncodeInfoHeader();
+ // Encodes a row of image data which does not have alpha data
+ void EncodeImageDataRow24(const uint8_t* aData);
+ // Encodes a row of image data which does have alpha data
+ void EncodeImageDataRow32(const uint8_t* aData);
+ // Obtains the current offset filled up to for the image buffer
+ inline int32_t GetCurrentImageBufferOffset()
+ {
+ return static_cast<int32_t>(mImageBufferCurr - mImageBufferStart);
+ }
+
+ // These headers will always contain endian independent stuff
+ // They store the BMP headers which will be encoded
+ mozilla::image::bmp::FileHeader mBMPFileHeader;
+ mozilla::image::bmp::V5InfoHeader mBMPInfoHeader;
+
+ // Keeps track of the start of the image buffer
+ uint8_t* mImageBufferStart;
+ // Keeps track of the current position in the image buffer
+ uint8_t* mImageBufferCurr;
+ // Keeps track of the image buffer size
+ uint32_t mImageBufferSize;
+ // Keeps track of the number of bytes in the image buffer which are read
+ uint32_t mImageBufferReadPoint;
+ // Stores true if the image is done being encoded
+ bool mFinished;
+
+ nsCOMPtr<nsIInputStreamCallback> mCallback;
+ nsCOMPtr<nsIEventTarget> mCallbackTarget;
+ uint32_t mNotifyThreshold;
+};
+
+#endif // mozilla_image_encoders_bmp_nsBMPEncoder_h