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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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/** Display Management (Display) */ |
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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_display.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_display_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 the display and calls the display driver */ |
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/* setup function. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* display Display control block */ |
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/* name Name of display */ |
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/* display_driver_setup Display driver setup function */ |
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/* width Display width in pixels */ |
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/* height Display height in pixels */ |
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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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/* memset Set control block to zero */ |
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/* _gx_system_error_process System error handler */ |
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/* [dispaly_driver_setup] Call display driver setup */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application Code */ |
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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_display_create(GX_DISPLAY *display, GX_CONST GX_CHAR *name, |
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UINT (*display_driver_setup)(GX_DISPLAY *), |
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GX_VALUE width, GX_VALUE height) |
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{ |
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UINT status; |
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/* Clear the display control block. */ |
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memset(display, 0, sizeof(GX_DISPLAY)); |
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display -> gx_display_width = width; |
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display -> gx_display_height = height; |
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/* Call the display driver setup function. This function initializes the underlying |
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hardware and sets up all the primitive drawing function pointers. */ |
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status = display_driver_setup(display); |
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/* Determine if the display driver setup was successful. */ |
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✓✓ |
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if (status) |
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{ |
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/* Error setting up display driver - call system error handler. */ |
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_gx_system_error_process(GX_SYSTEM_DRIVER_SETUP_ERROR); |
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/* Return to system error. */ |
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return(GX_SYSTEM_ERROR); |
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} |
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/* Load the display ID field in the display control block. */ |
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display -> gx_display_id = GX_DISPLAY_ID; |
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/* Save the display name. */ |
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display -> gx_display_name = name; |
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/* Place the display on the list of created displays. |
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First, check for an empty list. */ |
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_gx_system_display_created_count++; |
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✓✓ |
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if (_gx_system_display_created_list) |
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{ |
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_gx_system_display_created_list -> gx_display_created_previous = display; |
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display -> gx_display_created_next = _gx_system_display_created_list; |
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} |
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_gx_system_display_created_list = display; |
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/* Return successful status. */ |
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return(GX_SUCCESS); |
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} |
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