Function LoadPixelDataRLE8

Dependencies/FreeImage/Source/FreeImage/PluginBMP.cpp:350–453

Load image pixels for 8-bit RLE compressed dib @param io FreeImage IO @param handle FreeImage IO handle @param width Image width @param height Image height @param dib Image to be loaded @return Returns TRUE if successful, returns FALSE otherwise */

@return Returns TRUE if successful, returns FALSE otherwise
*/
static BOOL 
LoadPixelDataRLE8(FreeImageIO *io, fi_handle handle, int width, int height, FIBITMAP *dib) {
	BYTE status_byte = 0;
	BYTE second_byte = 0;
	int scanline = 0;
	int bits = 0;

	for (;;) {
		if( io->read_proc(&status_byte, sizeof(BYTE), 1, handle) != 1) {
			return FALSE;
		}

		switch (status_byte) {
			case RLE_COMMAND :
				if(io->read_proc(&status_byte, sizeof(BYTE), 1, handle) != 1) {
					return FALSE;
				}

				switch (status_byte) {
					case RLE_ENDOFLINE :
						bits = 0;
						scanline++;
						break;

					case RLE_ENDOFBITMAP :
						return TRUE;

					case RLE_DELTA :
					{
						// read the delta values

						BYTE delta_x = 0;
						BYTE delta_y = 0;

						if(io->read_proc(&delta_x, sizeof(BYTE), 1, handle) != 1) {
							return FALSE;
						}
						if(io->read_proc(&delta_y, sizeof(BYTE), 1, handle) != 1) {
							return FALSE;
						}

						// apply them

						bits     += delta_x;
						scanline += delta_y;

						break;
					}

					default :
					{
						if(scanline >= abs(height)) {
							return TRUE;
						}

						int count = MIN((int)status_byte, width - bits);

						BYTE *sline = FreeImage_GetScanLine(dib, scanline);