1 files changed, 150 insertions, 0 deletions
diff --git a/image/encoders/bmp/nsBMPEncoder.h b/image/encoders/bmp/nsBMPEncoder.h
new file mode 100644
index 0000000000..1f40d9df34
--- /dev/null
+++ b/image/encoders/bmp/nsBMPEncoder.h
@@ -0,0 +1,150 @@
+/* -*- 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 "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