started work on RLE Compressed Bitmap Stream
This commit is contained in:
Jay Sorg
parent
9160411803
commit
4012b2db9b
962
libfreerdp-core/rle_bitmap_stream.c
Normal file
962
libfreerdp-core/rle_bitmap_stream.c
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@ -0,0 +1,962 @@
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/**
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* FreeRDP: A Remote Desktop Protocol Client
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* RLE Compressed Bitmap Stream
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*
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* Copyright 2011 Jay Sorg <jay.sorg@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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RLE Compressed Bitmap Stream (RLE_BITMAP_STREAM)
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http://msdn.microsoft.com/en-us/library/cc240895%28v=prot.10%29.aspx
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*/
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#include <freerdp/utils/stream.h>
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#include <freerdp/utils/memory.h>
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#define REGULAR_BG_RUN 0x0
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#define MEGA_MEGA_BG_RUN 0xF0
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#define REGULAR_FG_RUN 0x1
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#define MEGA_MEGA_FG_RUN 0xF1
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#define LITE_SET_FG_FG_RUN 0xC
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#define MEGA_MEGA_SET_FG_RUN 0xF6
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#define LITE_DITHERED_RUN 0xE
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#define MEGA_MEGA_DITHERED_RUN 0xF8
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#define REGULAR_COLOR_RUN 0x3
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#define MEGA_MEGA_COLOR_RUN 0xF3
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#define REGULAR_FGBG_IMAGE 0x2
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#define MEGA_MEGA_FGBG_IMAGE 0xF2
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#define LITE_SET_FG_FGBG_IMAGE 0xD
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#define MEGA_MEGA_SET_FGBG_IMAGE 0xF7
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#define REGULAR_COLOR_IMAGE 0x4
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#define MEGA_MEGA_COLOR_IMAGE 0xF4
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#define SPECIAL_FGBG_1 0xF9
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#define SPECIAL_FGBG_2 0xFA
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#define SPECIAL_WHITE 0xFD
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#define SPECIAL_BLACK 0xFE
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/*
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Bitmasks
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*/
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static uint8 g_MaskBit0 = 0x01; /* Least significant bit */
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static uint8 g_MaskBit1 = 0x02;
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static uint8 g_MaskBit2 = 0x04;
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static uint8 g_MaskBit3 = 0x08;
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static uint8 g_MaskBit4 = 0x10;
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static uint8 g_MaskBit5 = 0x20;
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static uint8 g_MaskBit6 = 0x40;
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static uint8 g_MaskBit7 = 0x80; /* Most significant bit */
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static uint8 g_MaskRegularRunLength = 0x1F;
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static uint8 g_MaskLiteRunLength = 0x0F;
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static uint8 g_MaskSpecialFgBg1 = 0x03;
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static uint8 g_MaskSpecialFgBg2 = 0x05;
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typedef uint32 PIXEL;
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/*
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Returns the color depth (in bytes per pixel) that was selected
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for the RDP connection.
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*/
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static uint32
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GetColorDepth(void)
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{
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return 8;
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}
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/*
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PIXEL is a dynamic type that is sized based on the current color
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depth being used for the RDP connection.
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if (GetColorDepth() == 8) then PIXEL is an 8-bit unsigned integer
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if (GetColorDepth() == 15) then PIXEL is a 16-bit unsigned integer
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if (GetColorDepth() == 16) then PIXEL is a 16-bit unsigned integer
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if (GetColorDepth() == 24) then PIXEL is a 24-bit unsigned integer
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*/
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/*
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Writes a pixel to the specified buffer.
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*/
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static void
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WritePixel(uint8 * pbBuffer, PIXEL pixel)
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{
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pbBuffer[0] = pixel;
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}
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/*
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Reads a pixel from the specified buffer.
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*/
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static PIXEL
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ReadPixel(uint8 * pbBuffer)
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{
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return pbBuffer[0];
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}
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/*
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Returns the size of a pixel in bytes.
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*/
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static uint32
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GetPixelSize(void)
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{
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uint32 colorDepth = GetColorDepth();
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if (colorDepth == 8)
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{
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return 1;
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}
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else if (colorDepth == 15 || colorDepth == 16)
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{
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return 2;
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}
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else if (colorDepth == 24)
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{
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return 3;
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}
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}
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/*
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Returns a pointer to the next pixel in the specified buffer.
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*/
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static uint8 *
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NextPixel(uint8 * pbBuffer)
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{
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return pbBuffer + GetPixelSize();
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}
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/*
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Reads the supplied order header and extracts the compression
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order code ID.
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*/
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static uint32
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ExtractCodeId(uint8 bOrderHdr)
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{
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/* TODO */
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return 0;
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}
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/*
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Returns a pointer to the data that follows the compression
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order header and optional run length.
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*/
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static uint8 *
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AdvanceOverOrderHeader(uint32 codeId, uint8 * pbOrderHdr)
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{
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/* TODO */
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return pbOrderHdr;
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}
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/*
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Returns TRUE if the supplied code identifier is for a regular-form
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standard compression order. For example IsRegularCode(0x01) returns
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TRUE as 0x01 is the code ID for a Regular Foreground Run Order.
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*/
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static boolean
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IsRegularCode(uint32 codeId)
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{
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switch (codeId)
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{
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case REGULAR_BG_RUN:
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case REGULAR_FG_RUN:
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case REGULAR_COLOR_RUN:
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case REGULAR_FGBG_IMAGE:
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case REGULAR_COLOR_IMAGE:
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return True;
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}
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return False;
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}
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/*
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Returns TRUE if the supplied code identifier is for a lite-form
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standard compression order. For example IsLiteCode(0x0E) returns
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TRUE as 0x0E is the code ID for a Lite Dithered Run Order.
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*/
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static boolean
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IsLiteCode(uint32 codeId)
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{
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switch (codeId)
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{
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case LITE_SET_FG_FG_RUN:
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case LITE_DITHERED_RUN:
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case LITE_SET_FG_FGBG_IMAGE:
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return True;
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}
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return False;
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}
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/*
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Returns TRUE if the supplied code identifier is for a MEGA_MEGA
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type extended compression order. For example IsMegaMegaCode(0xF0)
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returns TRUE as 0xF0 is the code ID for a MEGA_MEGA Background
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Run Order.
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*/
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static boolean
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IsMegaMegaCode(uint32 codeId)
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{
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switch (codeId)
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{
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case MEGA_MEGA_BG_RUN:
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case MEGA_MEGA_FG_RUN:
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case MEGA_MEGA_SET_FG_RUN:
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case MEGA_MEGA_DITHERED_RUN:
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case MEGA_MEGA_COLOR_RUN:
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case MEGA_MEGA_FGBG_IMAGE:
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case MEGA_MEGA_SET_FGBG_IMAGE:
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case MEGA_MEGA_COLOR_IMAGE:
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return True;
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}
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return False;
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}
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/*
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Returns a black pixel.
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*/
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static PIXEL
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GetColorBlack(void)
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{
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uint32 colorDepth = GetColorDepth();
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if (colorDepth == 8)
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{
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return (PIXEL) 0x00;
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}
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else if (colorDepth == 15)
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{
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return (PIXEL) 0x0000;
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}
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else if (colorDepth == 16)
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{
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return (PIXEL) 0x0000;
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}
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else if (colorDepth == 24)
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{
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return (PIXEL) 0x000000;
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}
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}
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/*
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Returns a white pixel.
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*/
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static PIXEL
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GetColorWhite(void)
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{
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uint32 colorDepth = GetColorDepth();
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if (colorDepth == 8)
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{
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/*
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Palette entry #255 holds black.
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*/
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return (PIXEL) 0xFF;
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}
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else if (colorDepth == 15)
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{
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/*
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5 bits per RGB component:
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0111 1111 1111 1111 (binary)
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*/
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return (PIXEL) 0x7FFF;
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}
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else if (colorDepth == 16)
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{
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/*
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5 bits for red, 6 bits for green, 5 bits for green:
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1111 1111 1111 1111 (binary)
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*/
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return (PIXEL) 0xFFFF;
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}
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else if (colorDepth == 24)
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{
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/*
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8 bits per RGB component:
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1111 1111 1111 1111 1111 1111 (binary)
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*/
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return (PIXEL) 0xFFFFFF;
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}
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}
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/*
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Extract the run length of a Regular-Form Foreground/Background
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Image Order.
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*/
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static uint32
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ExtractRunLengthRegularFgBg(uint8 * pbOrderHdr)
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{
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uint32 runLength;
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runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
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if (runLength == 0)
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{
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runLength = (*(pbOrderHdr + 1)) + 1;
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}
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else
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{
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runLength = runLength * 8;
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}
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return runLength;
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}
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/*
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Extract the run length of a Lite-Form Foreground/Background
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Image Order.
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*/
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static uint32
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ExtractRunLengthLiteFgBg(uint8 * pbOrderHdr)
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{
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uint32 runLength;
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runLength = (*pbOrderHdr) & g_MaskLiteRunLength;
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if (runLength == 0)
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{
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runLength = (*(pbOrderHdr + 1)) + 1;
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}
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else
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{
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runLength = runLength * 8;
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}
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return runLength;
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}
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/*
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Extract the run length of a regular-form compression order.
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*/
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static uint32
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ExtractRunLengthRegular(uint8 * pbOrderHdr)
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{
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uint32 runLength;
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runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
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if (runLength == 0)
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{
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/*
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An extended (MEGA) run.
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*/
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runLength = (*(pbOrderHdr + 1)) + 32;
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}
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return runLength;
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}
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/*
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Extract the run length of a lite-form compression order.
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*/
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static uint32
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ExtractRunLengthLite(uint8 * pbOrderHdr)
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{
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uint32 runLength;
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runLength = (*pbOrderHdr) & g_MaskLiteRunLength;
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if (runLength == 0)
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{
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/*
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An extended (MEGA) run.
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*/
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runLength = (*(pbOrderHdr + 1)) + 16;
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}
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return runLength;
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}
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/*
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Extract the run length of a MEGA_MEGA-type compression order.
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*/
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static uint32
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ExtractRunLengthMegaMega(uint8 * pbOrderHdr)
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{
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uint32 runLength;
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pbOrderHdr = pbOrderHdr + 1;
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runLength = ((uint16) pbOrderHdr[0]) | ((uint16) (pbOrderHdr[1] << 8));
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return runLength;
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}
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/*
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Extract the run length of a compression order.
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*/
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static uint32
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ExtractRunLength(uint32 code, uint8 * pbOrderHdr)
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{
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uint32 runLength;
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if (code == REGULAR_FGBG_IMAGE)
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{
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runLength = ExtractRunLengthRegularFgBg(pbOrderHdr);
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}
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else if (code == LITE_SET_FG_FGBG_IMAGE)
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{
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runLength = ExtractRunLengthLiteFgBg(pbOrderHdr);
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}
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else if (IsRegularCode(code))
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{
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runLength = ExtractRunLengthRegular(pbOrderHdr);
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}
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else if (IsLiteCode(code))
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{
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runLength = ExtractRunLengthLite(pbOrderHdr);
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}
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else if (IsMegaMegaCode(code))
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{
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runLength = ExtractRunLengthMegaMega(pbOrderHdr);
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}
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else
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{
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runLength = 0;
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}
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return runLength;
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}
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/*
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Write a foreground/background image to a destination buffer.
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*/
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static uint8 *
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WriteFgBgImage(uint8 * pbDest, uint32 rowDelta, uint8 bitmask,
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PIXEL fgPel, uint32 cBits)
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{
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PIXEL xorPixel;
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xorPixel = ReadPixel(pbDest - rowDelta);
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if (bitmask & g_MaskBit0)
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{
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WritePixel(pbDest, xorPixel ^ fgPel);
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}
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else
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{
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WritePixel(pbDest, xorPixel);
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}
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pbDest = NextPixel(pbDest);
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cBits = cBits - 1;
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if (cBits > 0)
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{
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xorPixel = ReadPixel(pbDest - rowDelta);
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if (bitmask & g_MaskBit1)
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{
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WritePixel(pbDest, xorPixel ^ fgPel);
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}
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else
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{
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WritePixel(pbDest, xorPixel);
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}
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pbDest = NextPixel(pbDest);
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cBits = cBits - 1;
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if (cBits > 0)
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{
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xorPixel = ReadPixel(pbDest - rowDelta);
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if (bitmask & g_MaskBit2)
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{
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WritePixel(pbDest, xorPixel ^ fgPel);
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}
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else
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{
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WritePixel(pbDest, xorPixel);
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}
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pbDest = NextPixel(pbDest);
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cBits = cBits - 1;
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if (cBits > 0)
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{
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xorPixel = ReadPixel(pbDest - rowDelta);
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if (bitmask & g_MaskBit3)
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{
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WritePixel(pbDest, xorPixel ^ fgPel);
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}
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else
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{
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WritePixel(pbDest, xorPixel);
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}
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pbDest = NextPixel(pbDest);
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cBits = cBits - 1;
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if (cBits > 0)
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{
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xorPixel = ReadPixel(pbDest - rowDelta);
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if (bitmask & g_MaskBit4)
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{
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WritePixel(pbDest, xorPixel ^ fgPel);
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}
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else
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{
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WritePixel(pbDest, xorPixel);
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}
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pbDest = NextPixel(pbDest);
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cBits = cBits - 1;
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if (cBits > 0)
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{
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xorPixel = ReadPixel(pbDest - rowDelta);
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if (bitmask & g_MaskBit5)
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{
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WritePixel(pbDest, xorPixel ^ fgPel);
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}
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else
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{
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WritePixel(pbDest, xorPixel);
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}
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pbDest = NextPixel(pbDest);
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cBits = cBits - 1;
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if (cBits > 0)
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{
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xorPixel = ReadPixel(pbDest - rowDelta);
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if (bitmask & g_MaskBit6)
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{
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WritePixel(pbDest, xorPixel ^ fgPel);
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}
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else
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{
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WritePixel(pbDest, xorPixel);
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}
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pbDest = NextPixel(pbDest);
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cBits = cBits - 1;
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if (cBits > 0)
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{
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xorPixel = ReadPixel(pbDest - rowDelta);
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if (bitmask & g_MaskBit7)
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{
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WritePixel(pbDest, xorPixel ^ fgPel);
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}
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else
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{
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WritePixel(pbDest, xorPixel);
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}
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pbDest = NextPixel(pbDest);
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}
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}
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}
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}
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}
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}
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}
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return pbDest;
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}
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/*
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Write a foreground/background image to a destination buffer
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for the first line of compressed data.
|
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*/
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static uint8 *
|
||||
WriteFirstLineFgBgImage(uint8 * pbDest, uint8 bitmask,
|
||||
PIXEL fgPel, uint32 cBits)
|
||||
{
|
||||
if (bitmask & g_MaskBit0)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
}
|
||||
pbDest = NextPixel(pbDest);
|
||||
cBits = cBits - 1;
|
||||
|
||||
if (cBits > 0)
|
||||
{
|
||||
if (bitmask & g_MaskBit1)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
}
|
||||
pbDest = NextPixel(pbDest);
|
||||
cBits = cBits - 1;
|
||||
|
||||
if (cBits > 0)
|
||||
{
|
||||
if (bitmask & g_MaskBit2)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
}
|
||||
pbDest = NextPixel(pbDest);
|
||||
cBits = cBits - 1;
|
||||
|
||||
if (cBits > 0)
|
||||
{
|
||||
if (bitmask & g_MaskBit3)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
}
|
||||
pbDest = NextPixel(pbDest);
|
||||
cBits = cBits - 1;
|
||||
|
||||
if (cBits > 0)
|
||||
{
|
||||
if (bitmask & g_MaskBit4)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
}
|
||||
pbDest = NextPixel(pbDest);
|
||||
cBits = cBits - 1;
|
||||
|
||||
if (cBits > 0)
|
||||
{
|
||||
if (bitmask & g_MaskBit5)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
}
|
||||
pbDest = NextPixel(pbDest);
|
||||
cBits = cBits - 1;
|
||||
|
||||
if (cBits > 0)
|
||||
{
|
||||
if (bitmask & g_MaskBit6)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
}
|
||||
pbDest = NextPixel(pbDest);
|
||||
cBits = cBits - 1;
|
||||
|
||||
if (cBits > 0)
|
||||
{
|
||||
if (bitmask & g_MaskBit7)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
}
|
||||
pbDest = NextPixel(pbDest);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return pbDest;
|
||||
}
|
||||
|
||||
/*
|
||||
Decompress an RLE compressed bitmap.
|
||||
*/
|
||||
void
|
||||
RleDecompress(uint8 * pbSrcBuffer, uint32 cbSrcBuffer,
|
||||
uint8 * pbDestBuffer, uint32 rowDelta)
|
||||
{
|
||||
uint8 * pbSrc = pbSrcBuffer;
|
||||
uint8 * pbEnd = pbSrcBuffer + cbSrcBuffer;
|
||||
uint8 * pbDest = pbDestBuffer;
|
||||
|
||||
PIXEL fgPel = GetColorWhite();
|
||||
boolean fInsertFgPel = False;
|
||||
boolean fFirstLine = True;
|
||||
|
||||
uint8 bitmask;
|
||||
PIXEL pixelA, pixelB;
|
||||
|
||||
uint32 runLength;
|
||||
uint32 code;
|
||||
|
||||
while (pbSrc < pbEnd)
|
||||
{
|
||||
/*
|
||||
Watch out for the end of the first scanline.
|
||||
*/
|
||||
if (fFirstLine)
|
||||
{
|
||||
if (pbDest - pbDestBuffer >= rowDelta)
|
||||
{
|
||||
fFirstLine = False;
|
||||
fInsertFgPel = False;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
Extract the compression order code ID from the compression
|
||||
order header.
|
||||
*/
|
||||
code = ExtractCodeId(*pbSrc);
|
||||
|
||||
/*
|
||||
Handle Background Run Orders.
|
||||
*/
|
||||
if (code == REGULAR_BG_RUN || code == MEGA_MEGA_BG_RUN)
|
||||
{
|
||||
runLength = ExtractRunLength(code, pbSrc);
|
||||
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
|
||||
|
||||
if (fFirstLine)
|
||||
{
|
||||
if (fInsertFgPel)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
pbDest = NextPixel(pbDest);
|
||||
runLength = runLength - 1;
|
||||
}
|
||||
while (runLength > 0)
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
pbDest = NextPixel(pbDest);
|
||||
runLength = runLength - 1;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
if (fInsertFgPel)
|
||||
{
|
||||
WritePixel(pbDest, ReadPixel(pbDest - rowDelta) ^ fgPel);
|
||||
pbDest = NextPixel(pbDest);
|
||||
runLength = runLength - 1;
|
||||
}
|
||||
|
||||
while (runLength > 0)
|
||||
{
|
||||
WritePixel(pbDest, ReadPixel(pbDest - rowDelta));
|
||||
pbDest = NextPixel(pbDest);
|
||||
runLength = runLength - 1;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
A follow-on background run order will need a
|
||||
foreground pel inserted.
|
||||
*/
|
||||
fInsertFgPel = True;
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
For any of the other run-types a follow-on background run
|
||||
order does not need a foreground pel inserted.
|
||||
*/
|
||||
fInsertFgPel = False;
|
||||
|
||||
/*
|
||||
Handle Foreground Run Orders.
|
||||
*/
|
||||
if (code == REGULAR_FG_RUN || code == MEGA_MEGA_FG_RUN ||
|
||||
code == LITE_SET_FG_FG_RUN || code == MEGA_MEGA_SET_FG_RUN)
|
||||
{
|
||||
runLength = ExtractRunLength(code, pbSrc);
|
||||
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
|
||||
|
||||
if (code == LITE_SET_FG_FG_RUN || code == MEGA_MEGA_SET_FG_RUN)
|
||||
{
|
||||
fgPel = ReadPixel(pbSrc);
|
||||
pbSrc = NextPixel(pbSrc);
|
||||
}
|
||||
|
||||
while (runLength > 0)
|
||||
{
|
||||
if (fFirstLine)
|
||||
{
|
||||
WritePixel(pbDest, fgPel);
|
||||
pbDest = NextPixel(pbDest);
|
||||
}
|
||||
else
|
||||
{
|
||||
WritePixel(pbDest, ReadPixel(pbDest - rowDelta) ^ fgPel);
|
||||
pbDest = NextPixel(pbDest);
|
||||
}
|
||||
|
||||
runLength = runLength - 1;
|
||||
}
|
||||
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
Handle Dithered Run Orders.
|
||||
*/
|
||||
if (code == LITE_DITHERED_RUN || code == MEGA_MEGA_DITHERED_RUN)
|
||||
{
|
||||
runLength = ExtractRunLength(code, pbSrc);
|
||||
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
|
||||
|
||||
pixelA = ReadPixel(pbSrc);
|
||||
pbSrc = NextPixel(pbSrc);
|
||||
pixelB = ReadPixel(pbSrc);
|
||||
pbSrc = NextPixel(pbSrc);
|
||||
|
||||
while (runLength > 0)
|
||||
{
|
||||
WritePixel(pbDest, pixelA);
|
||||
pbDest = NextPixel(pbDest);
|
||||
WritePixel(pbDest, pixelB);
|
||||
pbDest = NextPixel(pbDest);
|
||||
|
||||
runLength = runLength - 1;
|
||||
}
|
||||
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
Handle Color Run Orders.
|
||||
*/
|
||||
if (code == REGULAR_COLOR_RUN || code == MEGA_MEGA_COLOR_RUN)
|
||||
{
|
||||
runLength = ExtractRunLength(code, pbSrc);
|
||||
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
|
||||
|
||||
pixelA = ReadPixel(pbSrc);
|
||||
pbSrc = NextPixel(pbSrc);
|
||||
|
||||
while (runLength > 0)
|
||||
{
|
||||
WritePixel(pbDest, pixelA);
|
||||
pbDest = NextPixel(pbDest);
|
||||
|
||||
runLength = runLength - 1;
|
||||
}
|
||||
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
Handle Foreground/Background Image Orders.
|
||||
*/
|
||||
if (code == REGULAR_FGBG_IMAGE || code == MEGA_MEGA_FGBG_IMAGE ||
|
||||
code == LITE_SET_FG_FGBG_IMAGE || code == MEGA_MEGA_SET_FGBG_IMAGE)
|
||||
{
|
||||
runLength = ExtractRunLength(code, pbSrc);
|
||||
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
|
||||
|
||||
if (code == LITE_SET_FG_FGBG_IMAGE || code == MEGA_MEGA_SET_FGBG_IMAGE)
|
||||
{
|
||||
fgPel = ReadPixel(pbSrc);
|
||||
pbSrc = NextPixel(pbSrc);
|
||||
}
|
||||
|
||||
while (runLength > 8)
|
||||
{
|
||||
bitmask = *pbSrc;
|
||||
pbSrc = pbSrc + 1;
|
||||
|
||||
if (fFirstLine)
|
||||
{
|
||||
pbDest = WriteFirstLineFgBgImage(pbDest, bitmask, fgPel, 8 );
|
||||
}
|
||||
else
|
||||
{
|
||||
pbDest = WriteFgBgImage(pbDest, rowDelta, bitmask, fgPel, 8 );
|
||||
}
|
||||
|
||||
runLength = runLength - 8;
|
||||
}
|
||||
|
||||
if (runLength > 0)
|
||||
{
|
||||
bitmask = *pbSrc;
|
||||
pbSrc = pbSrc + 1;
|
||||
|
||||
if (fFirstLine)
|
||||
{
|
||||
pbDest = WriteFirstLineFgBgImage(pbDest, bitmask, fgPel, runLength);
|
||||
}
|
||||
else
|
||||
{
|
||||
pbDest = WriteFgBgImage(pbDest, rowDelta, bitmask, fgPel, runLength);
|
||||
}
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
Handle Color Image Orders.
|
||||
*/
|
||||
if (code == REGULAR_COLOR_IMAGE || code == MEGA_MEGA_COLOR_IMAGE)
|
||||
{
|
||||
uint32 byteCount;
|
||||
|
||||
runLength = ExtractRunLength(code, pbSrc);
|
||||
pbSrc = AdvanceOverOrderHeader(code, pbSrc);
|
||||
|
||||
byteCount = runLength * GetColorDepth();
|
||||
|
||||
while (byteCount > 0)
|
||||
{
|
||||
*pbDest = *pbSrc;
|
||||
pbDest = pbDest + 1;
|
||||
pbSrc = pbSrc + 1;
|
||||
byteCount = byteCount - 1;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
Handle Special Order 1.
|
||||
*/
|
||||
if (code == SPECIAL_FGBG_1)
|
||||
{
|
||||
if (fFirstLine)
|
||||
{
|
||||
pbDest = WriteFirstLineFgBgImage(pbDest, g_MaskSpecialFgBg1, fgPel, 8);
|
||||
}
|
||||
else
|
||||
{
|
||||
pbDest = WriteFgBgImage(pbDest, rowDelta, g_MaskSpecialFgBg1, fgPel, 8 );
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
Handle Special Order 2.
|
||||
*/
|
||||
if (code == SPECIAL_FGBG_2)
|
||||
{
|
||||
if (fFirstLine)
|
||||
{
|
||||
pbDest = WriteFirstLineFgBgImage(pbDest, g_MaskSpecialFgBg2, fgPel, 8);
|
||||
}
|
||||
else
|
||||
{
|
||||
pbDest = WriteFgBgImage(pbDest, rowDelta, g_MaskSpecialFgBg2, fgPel, 8);
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
Handle White Order.
|
||||
*/
|
||||
if (code == SPECIAL_WHITE)
|
||||
{
|
||||
WritePixel(pbDest, GetColorWhite());
|
||||
pbDest = NextPixel(pbDest);
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
Handle Black Order.
|
||||
*/
|
||||
if (code == SPECIAL_BLACK)
|
||||
{
|
||||
WritePixel(pbDest, GetColorBlack());
|
||||
pbDest = NextPixel(pbDest);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user