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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_canvas_offset_set PORTABLE C */ |
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/* 6.1.11 */ |
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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 assigns a canvas x,y display offset */ |
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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 coordinate of offset */ |
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/* y Y coordinate of offset */ |
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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_dirty_mark mark canvas as needing refresh*/ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* _gx_animation_start */ |
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/* _gx_animation_update */ |
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/* */ |
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/**************************************************************************/ |
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UINT _gx_canvas_offset_set(GX_CANVAS *canvas, GX_VALUE xoffset, GX_VALUE yoffset) |
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{ |
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GX_RECTANGLE oldpos; |
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GX_CANVAS *backcanvas; |
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VOID (*offset_function)(INT layer, GX_VALUE x, GX_VALUE y); |
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/* if there is a background canvas under this one it needs |
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to be marked as dirty in the area |
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this canvas is moving from |
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*/ |
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✓✓ |
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if (canvas -> gx_canvas_hardware_layer >= 0) |
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{ |
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offset_function = canvas -> gx_canvas_display -> gx_display_layer_services -> gx_display_layer_offset_set; |
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✓✓ |
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if (offset_function) |
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{ |
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offset_function(canvas -> gx_canvas_hardware_layer, xoffset, yoffset); |
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/* move the canvas display position */ |
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canvas -> gx_canvas_display_offset_x = xoffset; |
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canvas -> gx_canvas_display_offset_y = yoffset; |
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return(GX_SUCCESS); |
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} |
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} |
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✓✓ |
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if ((canvas -> gx_canvas_status & GX_CANVAS_MANAGED) && |
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✓✓ |
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canvas -> gx_canvas_created_next) |
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{ |
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backcanvas = canvas -> gx_canvas_created_next; |
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/* find the bottom layer canvas */ |
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✓✓ |
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while (backcanvas -> gx_canvas_created_next) |
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{ |
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backcanvas = backcanvas -> gx_canvas_created_next; |
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} |
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/* calculate rectangle bounding this canvas */ |
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oldpos.gx_rectangle_left = canvas -> gx_canvas_display_offset_x; |
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oldpos.gx_rectangle_top = canvas -> gx_canvas_display_offset_y; |
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oldpos.gx_rectangle_right = (GX_VALUE)(oldpos.gx_rectangle_left + canvas -> gx_canvas_x_resolution - 1); |
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oldpos.gx_rectangle_bottom = (GX_VALUE)(oldpos.gx_rectangle_top + canvas -> gx_canvas_y_resolution - 1); |
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✓✓ |
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if (backcanvas -> gx_canvas_draw_count > 0) |
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{ |
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_gx_utility_rectangle_combine(&oldpos, &backcanvas -> gx_canvas_dirty_area); |
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} |
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/* mark the background as dirty */ |
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_gx_canvas_dirty_mark(backcanvas, &oldpos); |
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} |
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/* move the canvas display position */ |
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canvas -> gx_canvas_display_offset_x = xoffset; |
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canvas -> gx_canvas_display_offset_y = yoffset; |
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/* now mark the foreground canvas as dirty and modified */ |
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_gx_canvas_dirty_mark(canvas, NULL); |
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return GX_SUCCESS; |
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} |
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