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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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/** 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_window.h" |
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#include "gx_canvas.h" |
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#include "gx_port.h" |
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/* Bring in externs for caller checking code. */ |
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GX_CALLER_CHECKING_EXTERNS |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gxe_canvas_shift 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 checks for errors in the canvas shift function call. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* canvas canvas control block */ |
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/* x x-axis shift amount in pixels */ |
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/* y y-axis shift amount 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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/* _gx_canvas_shift Actual canvas shift call. */ |
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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 _gxe_canvas_shift(GX_CANVAS *canvas, GX_VALUE x, GX_VALUE y) |
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{ |
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UINT status; |
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/* Check for appropriate caller. */ |
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✓✓✓✓
✓✓ |
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GX_INIT_AND_THREADS_CALLER_CHECKING |
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/* Check for the invalid input pointers. */ |
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✓✓ |
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if ((canvas == GX_NULL) || |
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✓✓ |
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(canvas -> gx_canvas_display == GX_NULL) || |
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✓✓ |
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(canvas -> gx_canvas_memory == GX_NULL)) |
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{ |
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return(GX_PTR_ERROR); |
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} |
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✓✓ |
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if (canvas -> gx_canvas_id != GX_CANVAS_ID) |
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{ |
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return (GX_INVALID_CANVAS); |
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} |
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/* Call the actual canvas shift function. */ |
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status = _gx_canvas_shift(canvas, x, y); |
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/* Return completion status. */ |
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return status; |
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} |
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