1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 12 /**************************************************************************/ 13 /**************************************************************************/ 14 /** */ 15 /** GUIX Component */ 16 /** */ 17 /** Display Management (Display) */ 18 /** */ 19 /**************************************************************************/ 20 21 #define GX_SOURCE_CODE 22 23 24 /* Include necessary system files. */ 25 26 #include "gx_api.h" 27 #include "gx_display.h" 28 29 30 /**************************************************************************/ 31 /* */ 32 /* FUNCTION RELEASE */ 33 /* */ 34 /* _gx_display_driver_8bpp_horizontal_pattern_line_draw */ 35 /* PORTABLE C */ 36 /* 6.1 */ 37 /* AUTHOR */ 38 /* */ 39 /* Kenneth Maxwell, Microsoft Corporation */ 40 /* */ 41 /* DESCRIPTION */ 42 /* */ 43 /* Generic 8bpp color format horizontal pattern line draw function. */ 44 /* */ 45 /* INPUT */ 46 /* */ 47 /* context Drawing context */ 48 /* xstart x-coord of left endpoint */ 49 /* xend x-coord of right endpoint */ 50 /* ypos y-coord of line top */ 51 /* */ 52 /* OUTPUT */ 53 /* */ 54 /* None */ 55 /* */ 56 /* CALLS */ 57 /* */ 58 /* None */ 59 /* */ 60 /* CALLED BY */ 61 /* */ 62 /* GUIX Internal Code */ 63 /* */ 64 /* RELEASE HISTORY */ 65 /* */ 66 /* DATE NAME DESCRIPTION */ 67 /* */ 68 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ 69 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ 70 /* resulting in version 6.1 */ 71 /* */ 72 /**************************************************************************/ _gx_display_driver_8bpp_horizontal_pattern_line_draw(GX_DRAW_CONTEXT * context,INT xstart,INT xend,INT ypos)73VOID _gx_display_driver_8bpp_horizontal_pattern_line_draw(GX_DRAW_CONTEXT *context, INT xstart, INT xend, INT ypos) 74 { 75 INT column; 76 GX_UBYTE *put; 77 GX_UBYTE *rowstart; 78 ULONG pattern; 79 ULONG mask; 80 GX_UBYTE on_color; 81 GX_UBYTE off_color; 82 83 INT len = xend - xstart + 1; 84 85 /* pick up start address of canvas memory */ 86 rowstart = (GX_UBYTE *)context -> gx_draw_context_memory; 87 88 /* calculate start of row address */ 89 rowstart += context -> gx_draw_context_pitch * ypos; 90 91 /* calculate pixel address */ 92 rowstart += xstart; 93 /* draw 1-pixel hi lines to fill width */ 94 95 /* pick up the requested pattern and mask */ 96 pattern = context -> gx_draw_context_brush.gx_brush_line_pattern; 97 mask = context -> gx_draw_context_brush.gx_brush_pattern_mask; 98 on_color = (GX_UBYTE)context -> gx_draw_context_brush.gx_brush_line_color; 99 off_color = (GX_UBYTE)context -> gx_draw_context_brush.gx_brush_fill_color; 100 101 put = rowstart; 102 103 /* draw one line, left to right */ 104 for (column = 0; column < len; column++) 105 { 106 if (pattern & mask) 107 { 108 *put++ = on_color; 109 } 110 else 111 { 112 *put++ = off_color; 113 } 114 mask >>= 1; 115 if (!mask) 116 { 117 mask = 0x80000000; 118 } 119 } 120 121 /* save current masks value back to brush */ 122 context -> gx_draw_context_brush.gx_brush_pattern_mask = mask; 123 } 124 125
