1 /**************************************************************************/ 2 /* */ 3 /* Copyright (c) Microsoft Corporation. All rights reserved. */ 4 /* */ 5 /* This software is licensed under the Microsoft Software License */ 6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */ 7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ 8 /* and in the root directory of this software. */ 9 /* */ 10 /**************************************************************************/ 11 12 13 /**************************************************************************/ 14 /**************************************************************************/ 15 /** */ 16 /** GUIX Component */ 17 /** */ 18 /** Display Management (Display) */ 19 /** */ 20 /**************************************************************************/ 21 22 #define GX_SOURCE_CODE 23 24 25 /* Include necessary system files. */ 26 27 #include "gx_api.h" 28 #include "gx_display.h" 29 #include "gx_canvas.h" 30 #include "gx_context.h" 31 32 /**************************************************************************/ 33 /* */ 34 /* FUNCTION RELEASE */ 35 /* */ 36 /* _gx_display_driver_generic_polygon_draw PORTABLE C */ 37 /* 6.1 */ 38 /* AUTHOR */ 39 /* */ 40 /* Kenneth Maxwell, Microsoft Corporation */ 41 /* */ 42 /* DESCRIPTION */ 43 /* */ 44 /* Generic polygon draw function. */ 45 /* */ 46 /* INPUT */ 47 /* */ 48 /* context Drawing context */ 49 /* vertex Array of vertexes */ 50 /* num Number of vertexes */ 51 /* */ 52 /* OUTPUT */ 53 /* */ 54 /* None */ 55 /* */ 56 /* CALLS */ 57 /* */ 58 /* _gx_canvas_line_draw Draw a line into canvas */ 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_generic_polygon_draw(GX_DRAW_CONTEXT * context,GX_POINT * vertex,INT num)73VOID _gx_display_driver_generic_polygon_draw(GX_DRAW_CONTEXT *context, GX_POINT *vertex, INT num) 74 { 75 INT index; 76 INT brush_width = context -> gx_draw_context_brush.gx_brush_width; 77 #if defined (GX_BRUSH_ALPHA_SUPPORT) 78 GX_UBYTE temp_alpha; 79 UINT brush_style; 80 temp_alpha = context -> gx_draw_context_brush.gx_brush_alpha; 81 brush_style = context -> gx_draw_context_brush.gx_brush_style; 82 if (brush_width > 1) 83 { 84 if (temp_alpha != 0xff) 85 { 86 if ((brush_style & GX_BRUSH_ROUND) || (brush_style & GX_BRUSH_ALIAS)) 87 { 88 context -> gx_draw_context_brush.gx_brush_alpha = GX_ALPHA_VALUE_OPAQUE; 89 } 90 } 91 } 92 #endif 93 94 if (brush_width > 0) 95 { 96 /*round end*/ 97 for (index = 0; index < num; index++) 98 { 99 _gx_canvas_line_draw(vertex[index].gx_point_x, vertex[index].gx_point_y, 100 vertex[(index + 1) % num].gx_point_x, vertex[(index + 1) % num].gx_point_y); 101 } 102 } 103 #if defined (GX_BRUSH_ALPHA_SUPPORT) 104 context -> gx_draw_context_brush.gx_brush_alpha = temp_alpha; 105 #endif 106 } 107 108
