iul_sd_macros.h
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/*****************************************************************************
* Copyright Statement:
* --------------------
* This software is protected by Copyright and the information contained
* herein is confidential. The software may not be copied and the information
* contained herein may not be used or disclosed except with the written
* permission of MediaTek Inc. (C) 2007
*
* BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
* THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
* RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
* AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
* NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
* SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
* SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
* THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
* NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
* SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
*
* BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
* LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
* AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
* OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
* MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*
* THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
* WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
* LAWS PRINCIPLES. ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
* RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
* THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
*
*****************************************************************************/
/*****************************************************************************
*
* Filename:
* ---------
* iul_sd_macros.h
*
* Project:
* --------
* N/A
*
* Description:
* ------------
* Image Utility Library: macros for SW spatial dithering
*
* Author:
* -------
* -------
*
*============================================================================
* HISTORY
* Below this line, this part is controlled by ClearCase. DO NOT MODIFY!!
*------------------------------------------------------------------------------
* $Log$
*
* 11 23 2010 rey.su
* removed!
* .
*
* 10 26 2010 rey.su
* removed!
* .
*
*------------------------------------------------------------------------------
* Upper this line, this part is controlled by ClearCase. DO NOT MODIFY!!
*============================================================================
****************************************************************************/
#ifndef __IUL_SD_MACROS_H__
#define __IUL_SD_MACROS_H__
#include "iul_rng.h"
/**
* @brief Macro to saturate a value to zero.
*/
#define IUL_SD_SATURATE_ZERO(value) (~((signed int)(value) >> 31) & (value))
/**
* @brief Initialization for spatial dithering.
* @remarks Invoke this macro right after the variable declaration of the function.
*/
#define IUL_SD_INITIALIZE() \
unsigned int sd_noise = 0; \
int sd_noise_bit = -1; \
IUL_RNG_MWC_INITIALIZE(); \
/**
* @brief Convert a RGB888 pixel into RGB565 format with dithering.
* @param r R component.
* @param g G component.
* @param b B component.
* @param pDst pointer to the output RGB565 data.
* @remarks the pDst pointer will not be advanced in the macro.
*/
#define IUL_SD_RGB888_TO_RGB565(r, g, b, pDst) \
do { \
int noise; \
int out0, out1, out2; \
if (--sd_noise_bit < 0) \
{ \
sd_noise_bit = 10; \
IUL_RNG_MWC_GENERATE(sd_noise); \
} \
noise = sd_noise & 7; \
sd_noise >>= 3; \
out0 = ((signed)(r) - noise) >> 3; \
out0 = IUL_SD_SATURATE_ZERO(out0); \
out2 = ((signed)(b) - noise) >> 3; \
out2 = IUL_SD_SATURATE_ZERO(out2); \
out1 = ((signed)(g) - (noise >> 1)) >> 2; \
out1 = IUL_SD_SATURATE_ZERO(out1); \
*(pDst) = (out0 << 11) | (out1 << 5) | out2; \
} while (0)
/**
* @brief Convert a RGB888 pixel into RGB565 format with dithering.
* @param r R component.
* @param g G component.
* @param b B component.
* @param srcKey Source key color
* @param pDst pointer to the output RGB565 data.
* @remarks the pDst pointer will not be advanced in the macro.
*/
#define IUL_SD_RGB888_TO_RGB565_WITH_SRCKEY(r, g, b, srcKey, pDst) \
do { \
unsigned short packed_output; \
int noise; \
int out0, out1, out2; \
if (--sd_noise_bit < 0) \
{ \
sd_noise_bit = 10; \
IUL_RNG_MWC_GENERATE(sd_noise); \
} \
noise = sd_noise & 7; \
sd_noise >>= 3; \
out0 = ((signed)(r) - noise) >> 3; \
out0 = IUL_SD_SATURATE_ZERO(out0); \
out2 = ((signed)(b) - noise) >> 3; \
out2 = IUL_SD_SATURATE_ZERO(out2); \
out1 = ((signed)(g) - (noise >> 1)) >> 2; \
out1 = IUL_SD_SATURATE_ZERO(out1); \
packed_output = (out0 << 11) | (out1 << 5) | out2; \
if (srcKey == packed_output) \
{ \
packed_output ^= 1; \
} \
*(pDst) = packed_output; \
} while (0)
/**
* @brief Add 2-bits dithering to a RGB888 pixel.
* @param c0 the 1st color component.
* @param c1 the 2nd color component.
* @param c2 the 3rd color component.
* @param pDst pointer to the output RGB888 data.
* @remarks the pDst pointer will not be advanced in the macro.
*/
#define IUL_SD_RGB888_2BITS_DITHERING(c0, c1, c2, pDst) \
do { \
int noise; \
int out0, out1, out2; \
if (--sd_noise_bit < 0) \
{ \
sd_noise_bit = 16; \
IUL_RNG_MWC_GENERATE(sd_noise); \
} \
noise = sd_noise & 3; \
sd_noise >>= 2; \
out0 = (signed)(c0) - noise; \
out0 = IUL_SD_SATURATE_ZERO(out0); \
out1 = (signed)(c1) - noise; \
out1 = IUL_SD_SATURATE_ZERO(out1); \
out2 = (signed)(c2) - noise; \
out2 = IUL_SD_SATURATE_ZERO(out2); \
(pDst)[0] = out0; \
(pDst)[1] = out1; \
(pDst)[2] = out2; \
} while (0)
/**
* @brief Add 2-bits dithering to a RGB888 pixel.
* @param c0 the 1st color component.
* @param c1 the 2nd color component.
* @param c2 the 3rd color component.
* @param srcKey0 the 1st color component of source key color
* @param srcKey1 the 2nd color component of source key color
* @param srcKey2 the 3rd color component of source key color
* @param pDst pointer to the output RGB888 data.
* @remarks the pDst pointer will not be advanced in the macro.
*/
#define IUL_SD_RGB888_2BITS_DITHERING_WITH_SRCKEY(c0, c1, c2, srcKey0, srcKey1, srcKey2, pDst) \
do { \
int noise; \
int out0, out1, out2; \
if (--sd_noise_bit < 0) \
{ \
sd_noise_bit = 16; \
IUL_RNG_MWC_GENERATE(sd_noise); \
} \
noise = sd_noise & 3; \
sd_noise >>= 2; \
out0 = (signed)(c0) - noise; \
out0 = IUL_SD_SATURATE_ZERO(out0); \
out1 = (signed)(c1) - noise; \
out1 = IUL_SD_SATURATE_ZERO(out1); \
out2 = (signed)(c2) - noise; \
out2 = IUL_SD_SATURATE_ZERO(out2); \
if (out0 == srcKey0 && out1 == srcKey1 && out2 == srcKey2) \
{ \
out1 ^= 1; \
} \
(pDst)[0] = out0; \
(pDst)[1] = out1; \
(pDst)[2] = out2; \
} while (0)
#endif /// __IUL_SD_MACROS_H__