The method adjusts specified X coordinate if it is negative or outside the bitmap.

Fills the 16bit pixels into the destination pointer This method uses the concept of Duff's Device

Fills the 32bit pixels into the destination pointer This method uses the concept of Duff's Device

The method changes current display mode of the bitmap converting bitmap scan lines color and writting the resulting scan line to the same memory occupied by the bitmap. No additional memory is allocated. Note: The method must be called only from CBitwiseBitmap::SetDisplayMode method. CBitwiseBitmap::SetDisplayMode .

Set a flag to indicate that this bitmap has to be compressed in the FBServer background thread

Compress a bitmap if possible. If the bitmap is already compressed, or if compression yields no decrease in size, do nothing, but return success (KErrNone).

Compress a bitmap if possible. If the bitmap is already compressed, or if compression yields no decrease in size, do nothing, but return success (KErrNone).

The method is caled from CBitwiseBitmap::SetDisplayMode() and checks the aDisplayMode argument and bitmap internal state. Requested display mode can't be greater (bpp value) than the initial display mode. Note: The method must be called only from CBitwiseBitmap::SetDisplayMode method. CBitwiseBitmap::SetDisplayMode .

The function decodes 24-bit compressed buffer to the 16-bit stream with unused top bytes by using RLE compression algorithm

The alternative decoding function which decompresses 24-bit buffer to the 16-bit stream with unused top bytes by using RLE compression algorithm. The function is used under low memory conditions.

The function decodes 32-bit compressed buffer (where top bytes are used as alpha channel) to the 32-bit stream by using RLE compression algorithm

The alternative decoding function which decompresses 32-bit buffer (where top bytes are used as alpha channel) to the 32-bit stream by using RLE compression algorithm. The function is using in case of memory shortage.

The function decodes 24-bit compressed buffer to the 32-bit stream with unused top bytes by using RLE compression algorithm

The alternative decoding function which decompresses 24-bit buffer to the 32-bit stream with unused top bytes by using RLE compression algorithm. The function is using in case of memory shortage.

The function externalizes 32-bit buffer with alpha channel in top byte to the 32-bit compressed stream by using RLE compression algorithm

The function externalizes 32-bit buffer with unused top bytes to the 24-bit compressed stream by using RLE compression algorithm

The method generates a line from compressed 24 bpp bitmap data. TScanLineDecompressor

The method generates a line from compressed 32 bpp to 32 bpp bitmap data . TScanLineDecompressor

The method generates a line from compressed 24 bpp to 32 bpp bitmap data . TScanLineDecompressor

The method generates a line from compressed 16 bpp bitmap data. TScanLineDecompressor

Create a scan line from a palette compressed bitmap. Starting from aPixel in the bitmap pointed to be aBase, populate aDestBuffer with aLength pixels looked up in the palette. Note this function assumes 16, 24 or 32 non alpha bit uncompressed bitmaps, compressed into 8 bit palettes (ie <256 colors) Structure of bitmap is (4 bytes for palette size) + (4 bytes per palette entry) + (1 byte per pixel)

If the bitmap is compressed in RAM, the method will find its compresssion bookmark, which is located at the end of the bitmap data and will reinitialize aLineScanPos parameter.

The method retrieves the RGB color values from the scanline, and converts them into the destination screen-mode pixel format. This method handles the special case when the destination mode is EColor16MAP (32bit with alpha values premultiplied with the color channels. Calls GetRgbPixelExMany for values not 32 bit, as there is no alpha information in these color modes. For color mode EColor16MU, no conversion is performed (as alpha is assumed to be 1).

Get the scanline data into the destination buffer in the EColor16MAP format.

Gets the bitmap s vertical scanline starting at the specified x co-ordinate and using the specified dither offset. Note: The method works for uncompressed bitmaps only.

The header is exposed by CFbsBitmap so this doesn't break encapsulation. Specifically added to allow CBitmapObject to see compression information.

Internalizes the bit map contents from a stream.

Check for a bitmap if it is compressed in some manner.

Tests whether or not the bitmap is monochrome. Monochrome bitmaps have a display-mode of 1 bit-per-pixel. Note: The method works for uncompressed bitmaps only.

Specialised function for assigning pixels into an uncompressed scanline of 16 bit color depth. Implemented for speed, not size

Specialised function for assigning pixels into an uncompressed scanline of 24 bit color depth. Implemented for speed, not size

Specialised function for assigning pixels into an uncompressed scanline of 32 bit color depth. Implemented for speed, not size

Get the bits used per pixel when packing multiple pixels in palette compression. The value returned is a power of 2, not always the most efficient pack, for alignment reasons, Eg 65537 -> KMaxTInt : 32 bpp 257 -> 65536 colors : 16 bpp 17 -> 256 colors : 8 bpp 5 -> 16 colors : 4 bpp 3 -> 4 colors : 2 bpp 0 -> 2 colors : 1 bpp

Gets the bytes used per pixel according to the bits per pixel of a bitmap. Also used to find which bit per pixel values are supported by palette compression, hence this is not a case of simple division by 8. If return value is zero, the supplied bit per pixel value is not supported by palette compression.

Specialised function for decoding pixels from a palette compressed bitmap with 1 pixel packed in each byte. Implemented for speed, not size

Specialised function for decoding pixels from a palette compressed bitmap with 2 pixels packed in each byte. Implemented for speed, not size

Specialised function for decoding pixels from a palette compressed bitmap with 4 pixels packed in each byte. Implemented for speed, not size

Specialised function for decoding pixels from a palette compressed bitmap with 8 pixels packed in each byte. Implemented for speed, not size

This function deals with all different bit depths & color counts dynamically - smaller but slower

The method changes current display mode of the bitmap. Requested display mode can't be greater (bpp value) than the initial display mode. CBitwiseBitmap instances are shared between the client and server side and SetDisplayMode() can be called only from the client side, because its functionality depends on the RFbsSession instance. The method can't leave because of out of memory condition or something else - no additional memory is allocated or "L" methods called. The bitmap content is preserved when converting it to the requested display mode, but there may be some loss of a quality.

This function calculates the size of 32-bit RLE compression stream which is obtained from a given 32-bit buffer, where the top 8 bits are used to represent the alpha channel

The function calculates the size of 24-bit RLE compression stream which could be obtain from given 32-bit buffer, where the top bytes are unused

The method swaps the bitmap width and height. For example: if the bitmap size is (40, 20), the new bitmap size will be (20, 40). Bitmap content is not preserved.

The method updates CBitwiseBitmap data members regarding to the new display mode. Note: The method must be called only from CBitwiseBitmap::SetDisplayMode method. CBitwiseBitmap::SetDisplayMode .

If the bitmap is compressed in RAM, the method will update its compresssion bookmark data, which is located at the end of the bitmap data.

Optimises the bitmap data for Run Length Encoding by changing unused pixel data. This function calculates number of padding pixels per scanline and replaces their color with the color of the scanline's final pixel.