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214 lines
7.4 KiB
C
214 lines
7.4 KiB
C
/*
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* Copyright (C) 2022 Arm Limited or its affiliates. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* 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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* 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, WITHOUT
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* 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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* Project: Arm-2D Library
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* Title: #include "arm_2d.h"
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* Description: Public header file to contain the APIs for colour space
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* conversions
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*
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* $Date: 09. Aug 2022
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* $Revision: V.1.0.3
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*
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* Target Processor: Cortex-M cores
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* -------------------------------------------------------------------- */
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#ifndef __ARM_2D_CONVERSION_H__
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#define __ARM_2D_CONVERSION_H__
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/*============================ INCLUDES ======================================*/
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#include "arm_2d_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(__clang__)
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# pragma clang diagnostic push
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# pragma clang diagnostic ignored "-Wunknown-warning-option"
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# pragma clang diagnostic ignored "-Wreserved-identifier"
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# pragma clang diagnostic ignored "-Wdeclaration-after-statement"
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# pragma clang diagnostic ignored "-Wunknown-warning-option"
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# pragma clang diagnostic ignored "-Wreserved-identifier"
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# pragma clang diagnostic ignored "-Wsign-conversion"
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# pragma clang diagnostic ignored "-Wnarrowing"
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#elif defined(__IS_COMPILER_IAR__)
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# pragma diag_suppress=Go029
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#endif
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/*!
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* \addtogroup gConversion 6 Conversion Operations
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* @{
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*/
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/*============================ MACROS ========================================*/
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/*============================ MACROFIED FUNCTIONS ===========================*/
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#define arm_2d_convert_colour_to_rgb888(__SRC_ADDR, /* source tile address */ \
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__DES_ADDR /* target tile address */) \
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arm_2dp_convert_colour_to_rgb888( NULL, \
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(__SRC_ADDR), \
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(__DES_ADDR))
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#define arm_2d_convert_colour_to_rgb565(__SRC_ADDR, /* source tile address */ \
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__DES_ADDR /* target tile address */) \
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arm_2dp_convert_colour_to_rgb565( NULL, \
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(__SRC_ADDR), \
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(__DES_ADDR))
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/*============================ TYPES =========================================*/
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typedef arm_2d_op_src_t arm_2d_op_cl_convt_t;
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/*! \brief 3x16-bit packed RGB color
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* autovectorizer friendly format
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*/
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typedef union {
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uint16_t BGRA[4];
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struct {
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uint16_t B;
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uint16_t G;
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uint16_t R;
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uint16_t A;
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};
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} __arm_2d_color_fast_rgb_t;
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/*============================ GLOBAL VARIABLES ==============================*/
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/*============================ PROTOTYPES ====================================*/
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/*----------------------------------------------------------------------------*
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* RGB565 channels extraction/packing *
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*----------------------------------------------------------------------------*/
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/*!
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* \brief unpack a rgb565 colour into a given __arm_2d_color_fast_rgb_t object
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* \param[in] hwColour the target rgb565 colour
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* \param[out] ptRGB a __arm_2d_color_fast_rgb_t object
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*/
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ARM_NONNULL(2)
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__STATIC_INLINE void __arm_2d_rgb565_unpack(uint16_t hwColor,
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__arm_2d_color_fast_rgb_t * ptRGB)
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{
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assert(NULL != ptRGB);
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/* uses explicit extraction, leading to a more efficient autovectorized code */
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uint16_t maskRunpk = 0x001f, maskGunpk = 0x003f;
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ptRGB->B = (uint16_t) ((hwColor & maskRunpk) << 3);
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ptRGB->R = (uint16_t) ((hwColor >> 11) << 3);
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ptRGB->G = (uint16_t) (((hwColor >> 5) & maskGunpk) << 2);
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ptRGB->A = 0xFF;
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}
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/*!
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* \brief generate a rgb565 colour from a __arm_2d_color_fast_rgb_t object
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* \param[in] ptRGB the target __arm_2d_color_fast_rgb_t object
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* \return uint16_t a rgb565 colour
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*/
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ARM_NONNULL(1)
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__STATIC_INLINE uint16_t __arm_2d_rgb565_pack(__arm_2d_color_fast_rgb_t * ptRGB)
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{
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assert(NULL != ptRGB);
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arm_2d_color_rgb565_t tOutput = {
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.u5R = (uint16_t) ptRGB->R >> 3,
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.u6G = (uint16_t) ptRGB->G >> 2,
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.u5B = (uint16_t) ptRGB->B >> 3,
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};
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return tOutput.tValue;
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}
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/*!
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* \brief generate a cccn888 colour from a __arm_2d_color_fast_rgb_t object
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* \param[in] ptRGB the target __arm_2d_color_fast_rgb_t object
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* \return uint32_t a cccn888 colour
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* \note the alpha channel will be kept in the output value
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*/
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ARM_NONNULL(1)
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__STATIC_INLINE uint32_t __arm_2d_cccn888_pack(__arm_2d_color_fast_rgb_t * ptRGB)
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{
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assert(NULL != ptRGB);
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arm_2d_color_bgra8888_t tOutput = {
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.u8R = (uint16_t) ptRGB->R,
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.u8G = (uint16_t) ptRGB->G,
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.u8B = (uint16_t) ptRGB->B,
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.u8A = (uint16_t) ptRGB->A,
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};
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return tOutput.tValue;
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}
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/*----------------------------------------------------------------------------*
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* Colour Conversion *
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*----------------------------------------------------------------------------*/
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/*!
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* \brief convert the colour format of a given tile to gray8
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* \param[in] ptOP the control block, NULL means using the default control block
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* \param[in] ptSource the source tile
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* \param[out] ptTarget the output tile (holding a buffer)
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* \return arm_fsm_rt_t the operation result
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*/
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extern
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ARM_NONNULL(2,3)
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arm_fsm_rt_t arm_2dp_convert_colour_to_gray8( arm_2d_op_cl_convt_t *ptOP,
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const arm_2d_tile_t *ptSource,
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const arm_2d_tile_t *ptTarget);
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/*!
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* \brief convert the colour format of a given tile to rgb888
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* \param[in] ptOP the control block, NULL means using the default control block
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* \param[in] ptSource the source tile
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* \param[out] ptTarget the output tile (holding a buffer)
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* \return arm_fsm_rt_t the operation result
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*/
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extern
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ARM_NONNULL(2,3)
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arm_fsm_rt_t arm_2dp_convert_colour_to_rgb888( arm_2d_op_cl_convt_t *ptOP,
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const arm_2d_tile_t *ptSource,
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const arm_2d_tile_t *ptTarget);
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/*!
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* \brief convert the colour format of a given tile to rgb565
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* \param[in] ptOP the control block, NULL means using the default control block
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* \param[in] ptSource the source tile
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* \param[out] ptTarget the output tile (holding a buffer)
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* \return arm_fsm_rt_t the operation result
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*/
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extern
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ARM_NONNULL(2,3)
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arm_fsm_rt_t arm_2dp_convert_colour_to_rgb565( arm_2d_op_cl_convt_t *ptOP,
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const arm_2d_tile_t *ptSource,
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const arm_2d_tile_t *ptTarget);
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/*! @} */
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#if defined(__clang__)
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# pragma clang diagnostic pop
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#elif defined(__IS_COMPILER_IAR__)
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# pragma diag_warning=Go029
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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