/**************************************************************************/ /* */ /* Copyright (c) Microsoft Corporation. All rights reserved. */ /* */ /* This software is licensed under the Microsoft Software License */ /* Terms for Microsoft Azure RTOS. Full text of the license can be */ /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ /* and in the root directory of this software. */ /* */ /**************************************************************************/ /**************************************************************************/ /**************************************************************************/ /** */ /** GUIX Component */ /** */ /** Display Management (Display) */ /** */ /**************************************************************************/ #define GX_SOURCE_CODE /* Include necessary system files. */ #include "gx_api.h" #include "gx_display.h" /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _gx_display_driver_1bpp_horizontal_line_draw PORTABLE C */ /* 6.1 */ /* AUTHOR */ /* */ /* Kenneth Maxwell, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* Horizontal line draw function for 1bpp display driver. */ /* */ /* INPUT */ /* */ /* context Drawing context */ /* xstart x-coord of left endpoint */ /* xend x-coord of right endpoint */ /* ypos y-coord of line top */ /* width Width (height) of the line */ /* color Color of line to write */ /* */ /* OUTPUT */ /* */ /* None */ /* */ /* CALLS */ /* */ /* None */ /* */ /* CALLED BY */ /* */ /* GUIX Internal Code */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ /* resulting in version 6.1 */ /* */ /**************************************************************************/ VOID _gx_display_driver_1bpp_horizontal_line_draw(GX_DRAW_CONTEXT *context, INT xstart, INT xend, INT ypos, INT width, GX_COLOR color) { INT row; INT column; GX_UBYTE *put; GX_UBYTE *putrow; GX_UBYTE mask; INT stride; /* Get row pitch in bytes. */ stride = (context -> gx_draw_context_pitch + 7) >> 3; /* pick up start address of canvas memory */ putrow = (GX_UBYTE *)context -> gx_draw_context_memory; putrow += ypos * stride; putrow += (xstart >> 3); for (row = 0; row < width; row++) { put = putrow; mask = (GX_UBYTE)(0x80 >> (xstart & 0x07)); column = xstart; while (column <= xend) { if ((mask == 0x80) && (xend - column + 1 >= 8)) { while (xend - column + 1 >= 8) { if (color == 0x00) { *put++ = 0x00; } else if (color == 0x01) { *put++ = 0xff; } column += 8; } } else { if (color == 0x00) { *put = (GX_UBYTE)((*put) & (~mask)); } else if (color == 0x01) { *put |= mask; } mask >>= 1; if (mask == 0) { put++; mask = 0x80; } column++; } } putrow += stride; } }