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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** GUIX Component */ |
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/** */ |
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/** Image Reader Management (Image Reader) */ |
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/** */ |
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/**************************************************************************/ |
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#define GX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "gx_api.h" |
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#include "gx_image_reader.h" |
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#include "gx_utility.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_image_reader_gx_image_type_get PORTABLE C */ |
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/* 6.1 */ |
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/* AUTHOR */ |
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/* */ |
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/* Kenneth Maxwell, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function retrieves the image type and stores the image type */ |
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/* in the GX_IMAGE_READER control block. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* image_reader Image reader control block. */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Completion Status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* GUIX Internal Code */ |
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/* */ |
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/**************************************************************************/ |
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#if defined(GX_SOFTWARE_DECODER_SUPPORT) |
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static UINT _gx_image_reader_image_type_get(GX_IMAGE_READER *image_reader) |
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{ |
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GX_UBYTE image_type = 0; |
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GX_CONST GX_UBYTE *buffer; |
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buffer = image_reader -> gx_image_reader_source_data; |
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✓✓ |
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if (buffer) |
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{ |
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✓✓ |
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if (buffer[1] == 'P') |
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{ |
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image_type = GX_IMAGE_TYPE_PNG; |
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} |
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else |
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{ |
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✓✓ |
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if (buffer[6] == 'J') |
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{ |
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image_type = GX_IMAGE_TYPE_JPG; |
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} |
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else |
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{ |
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✓✓✓✓
✓✓ |
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if (buffer[1] == 0xd8 && buffer[0] == 0xff && (buffer[2] == 0xff)) |
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{ |
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image_type = GX_IMAGE_TYPE_JPG; |
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} |
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} |
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} |
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} |
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image_reader -> gx_image_reader_image_type = image_type; |
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return GX_SUCCESS; |
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} |
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#endif |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_image_reader_image_decode PORTABLE C */ |
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/* 6.3.0 */ |
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/* AUTHOR */ |
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/* */ |
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/* Kenneth Maxwell, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function decodes input image to raw pixelmap format. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* image_reader Image reader control block */ |
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/* outmap Output pixelmap */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _gx_image_reader_image_type_get */ |
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/* _gx_utility_jpeg_decode */ |
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/* _gx_utility_png_decode */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* _gx_image_reader_colorspace_convert */ |
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/* */ |
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/**************************************************************************/ |
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#if defined(GX_SOFTWARE_DECODER_SUPPORT) |
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UINT _gx_image_reader_image_decode(GX_IMAGE_READER *image_reader, GX_PIXELMAP *outmap) |
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{ |
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UINT status; |
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/* Get image type. */ |
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_gx_image_reader_image_type_get(image_reader); |
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✓✓✓ |
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switch (image_reader -> gx_image_reader_image_type) |
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{ |
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case GX_IMAGE_TYPE_JPG: |
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status = _gx_image_reader_jpeg_decode(image_reader, outmap); |
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break; |
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case GX_IMAGE_TYPE_PNG: |
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status = _gx_image_reader_png_decode(image_reader -> gx_image_reader_source_data, image_reader -> gx_image_reader_source_data_size, outmap); |
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✓✓ |
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if (outmap -> gx_pixelmap_transparent_color) |
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{ |
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image_reader -> gx_image_reader_png_trans = (GX_COLOR *)outmap -> gx_pixelmap_transparent_color; |
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} |
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break; |
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default: |
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return GX_NOT_SUPPORTED; |
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} |
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✓✓ |
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if (!(outmap -> gx_pixelmap_flags & GX_PIXELMAP_ALPHA)) |
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{ |
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image_reader -> gx_image_reader_mode = (GX_UBYTE)(image_reader -> gx_image_reader_mode & (ULONG)(~GX_IMAGE_READER_MODE_ALPHA)); |
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} |
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return status; |
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} |
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#endif |
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