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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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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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/** Utility (Utility) */ |
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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_canvas.h" |
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#include "gx_system.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_utility_gradient_delete 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 deletes a previously created gradient. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* gradient Pointer to GX_GRADIENT */ |
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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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/* CALLED BY */ |
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/* */ |
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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ |
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/* 09-30-2020 Kenneth Maxwell Modified comment(s), */ |
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/* resulting in version 6.1 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _gx_utility_gradient_delete(GX_GRADIENT *gradient) |
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{ |
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const GX_UBYTE *data_ptr = gradient -> gx_gradient_pixelmap.gx_pixelmap_data; |
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GX_GRADIENT *search; |
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GX_BOOL in_use = GX_FALSE; |
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GX_ENTER_CRITICAL |
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✓✓ |
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if (data_ptr) |
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{ |
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/* check to see if any other gradients are using same pixelmap data, |
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if not, then time to delete pixelmap data |
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*/ |
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search = _gx_system_gradient_list; |
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✓✓ |
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while (search) |
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{ |
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✓✓ |
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if (search != gradient && |
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✓✓ |
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search -> gx_gradient_pixelmap.gx_pixelmap_data == data_ptr) |
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{ |
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in_use = GX_TRUE; |
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break; |
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} |
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search = search -> gx_gradient_next; |
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} |
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/* unlink this gradient from gradient list */ |
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✓✓ |
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if (gradient -> gx_gradient_next) |
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{ |
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gradient -> gx_gradient_next -> gx_gradient_previous = gradient -> gx_gradient_previous; |
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} |
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✓✓ |
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if (gradient -> gx_gradient_previous) |
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{ |
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gradient -> gx_gradient_previous -> gx_gradient_next = gradient -> gx_gradient_next; |
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} |
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else |
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{ |
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_gx_system_gradient_list = gradient -> gx_gradient_next; |
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} |
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} |
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GX_EXIT_CRITICAL |
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✓✓✓✓
✓✓ |
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if (data_ptr && !in_use && _gx_system_memory_free) |
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{ |
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_gx_system_memory_free((void *)data_ptr); |
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} |
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memset(gradient, 0, sizeof(GX_GRADIENT)); |
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return GX_SUCCESS; |
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} |
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