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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_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_pixelmap_tile 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 prepares to draw the specified pixelmap at the */ |
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/* requested position. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* fill Area to fill with pixelmap */ |
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/* pixelmap Pointer to actual pixelmap */ |
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/* to draw */ |
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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_utility_rectangle_overlap_detect Detect rectangle overlap */ |
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/* _gx_canvas_pixelmap_draw Screen pixelmap draw routine */ |
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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_canvas_pixelmap_tile(GX_RECTANGLE *fill, GX_PIXELMAP *pixelmap) |
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{ |
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GX_VALUE xpos; |
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GX_VALUE ypos; |
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GX_DRAW_CONTEXT *context; |
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GX_RECTANGLE oldclip; |
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/* pick up the current drawing context */ |
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context = _gx_system_current_draw_context; |
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/* save the current dirty area */ |
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oldclip = context -> gx_draw_context_dirty; |
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/* clip to the fill rectangle */ |
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✓✓ |
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if (!_gx_utility_rectangle_overlap_detect(fill, &context -> gx_draw_context_dirty, |
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&context -> gx_draw_context_dirty)) |
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{ |
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context -> gx_draw_context_dirty = oldclip; |
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/* nothing to draw, return */ |
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return GX_SUCCESS; |
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} |
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✓✓ |
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if (!pixelmap -> gx_pixelmap_width || |
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✓✓ |
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!pixelmap -> gx_pixelmap_height) |
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{ |
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context -> gx_draw_context_dirty = oldclip; |
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return GX_FAILURE; |
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} |
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/* pickup starting y position */ |
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ypos = fill -> gx_rectangle_top; |
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/* loop from top to bottom */ |
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✓✓ |
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while (ypos <= fill -> gx_rectangle_bottom) |
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{ |
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/* pickup starting x position */ |
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xpos = fill -> gx_rectangle_left; |
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/* loop from left to right */ |
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✓✓ |
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while (xpos <= fill -> gx_rectangle_right) |
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{ |
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/* draw one tile */ |
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_gx_canvas_pixelmap_draw(xpos, ypos, pixelmap); |
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/* move to the right by one tile width */ |
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xpos = (GX_VALUE)(xpos + pixelmap -> gx_pixelmap_width); |
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} |
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/* move down by one tile height */ |
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ypos = (GX_VALUE)(ypos + pixelmap -> gx_pixelmap_height); |
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} |
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/* restore dirty rectangle */ |
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context -> gx_draw_context_dirty = oldclip; |
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/* Return successful completion. */ |
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return(GX_SUCCESS); |
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} |
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