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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_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_driver_8bit_palette_native_color_get 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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/* 8-bit palette mode display driver color conversion routine. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* display The associated display */ |
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/* rawcolor Raw Color value to be */ |
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/* converted */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* GX_COLOR Color value in the screen */ |
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/* color format */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* GUIX Internal 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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834 |
GX_COLOR _gx_display_driver_8bit_palette_native_color_get(GX_DISPLAY *display, GX_COLOR rawcolor) |
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{ |
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ULONG nearest_dist = 0x7fffffff; |
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ULONG dist; |
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INT red_dist; |
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INT green_dist; |
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INT blue_dist; |
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GX_COLOR pal_color; |
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INT pal_index; |
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INT nearest_index = 0; |
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GX_COLOR *palette = display -> gx_display_palette; |
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INT palsize = (INT)(display -> gx_display_palette_size); |
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✓✓✓✓
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if (palette && palsize) |
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{ |
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✓✓ |
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for (pal_index = 0; pal_index < palsize; pal_index++) |
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{ |
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pal_color = palette[pal_index]; |
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red_dist = (INT)(((rawcolor >> 16) & 0xff) - ((pal_color >> 16) & 0xff)); |
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green_dist = (INT)(((rawcolor >> 8) & 0xff) - ((pal_color >> 8) & 0xff)); |
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blue_dist = (INT)((rawcolor & 0xff) - (pal_color & 0xff)); |
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dist = (ULONG)((red_dist * red_dist) + (green_dist * green_dist) + (blue_dist * blue_dist)); |
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✓✓ |
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if (dist < nearest_dist) |
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{ |
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nearest_dist = dist; |
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nearest_index = pal_index; |
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} |
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} |
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} |
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return((GX_COLOR)nearest_index); |
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} |
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