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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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/** Canvas Management (Canvas) */ |
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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_system.h" |
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#include "gx_utility.h" |
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#include "gx_canvas.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_utility_alphamap_create 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 creates an 8bpp alpha-map pixelmap. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* width width of desired alphamap */ |
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/* height height of desired alphamap */ |
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/* map pointer to pixlmap structure */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* status Completion status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _gx_system_memory_allocator Dynamically allocate memory */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* _gx_utility_string_to_alphamap */ |
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/* application software */ |
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/* */ |
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/**************************************************************************/ |
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UINT _gx_utility_alphamap_create(INT width, INT height, GX_PIXELMAP *map) |
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{ |
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/* try to allocate memory for alphamap */ |
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GX_UBYTE *memptr; |
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ULONG memsize = (ULONG)(width * height); |
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✓✓ |
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if (width > GX_MAX_PIXELMAP_RESOLUTION) |
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{ |
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return GX_INVALID_WIDTH; |
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} |
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✓✓ |
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if (height > GX_MAX_PIXELMAP_RESOLUTION) |
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{ |
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return GX_INVALID_HEIGHT; |
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} |
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✓✓✓✓
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if (!memsize || _gx_system_memory_allocator == GX_NULL) |
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{ |
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return GX_FAILURE; |
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} |
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memptr = (GX_UBYTE *)(_gx_system_memory_allocator(memsize)); |
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✓✓ |
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if (memptr == GX_NULL) |
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{ |
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map -> gx_pixelmap_data = GX_NULL; |
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return GX_FAILURE; |
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} |
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map -> gx_pixelmap_aux_data = GX_NULL; |
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map -> gx_pixelmap_aux_data_size = 0; |
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map -> gx_pixelmap_data = memptr; |
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map -> gx_pixelmap_data_size = memsize; |
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map -> gx_pixelmap_flags = GX_PIXELMAP_TRANSPARENT; |
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map -> gx_pixelmap_transparent_color = 0; |
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map -> gx_pixelmap_format = GX_COLOR_FORMAT_8BIT_ALPHAMAP; |
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map -> gx_pixelmap_height = (GX_VALUE)height; |
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map -> gx_pixelmap_width = (GX_VALUE)width; |
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map -> gx_pixelmap_version_major = map -> gx_pixelmap_version_minor = 0; |
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memset(memptr, 0, (size_t)memsize); |
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return GX_SUCCESS; |
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} |
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