1 /** 2 * @file lv_vglite_path.h 3 * 4 */ 5 6 /** 7 * Copyright 2023 NXP 8 * 9 * SPDX-License-Identifier: MIT 10 */ 11 12 #ifndef LV_VGLITE_PATH_H 13 #define LV_VGLITE_PATH_H 14 15 #ifdef __cplusplus 16 extern "C" { 17 #endif 18 19 /********************* 20 * INCLUDES 21 *********************/ 22 #include "../../../lv_conf_internal.h" 23 24 #if LV_USE_DRAW_VGLITE 25 #include "../../lv_draw.h" 26 #include "../../lv_draw_triangle.h" 27 28 /********************* 29 * DEFINES 30 *********************/ 31 32 /* The optimal Bezier control point offset for radial unit 33 * see: https://spencermortensen.com/articles/bezier-circle/ 34 **/ 35 #define BEZIER_OPTIM_CIRCLE 0.551915024494f 36 37 /* Draw lines for control points of Bezier curves */ 38 #define BEZIER_DBG_CONTROL_POINTS 0 39 40 /* Path data sizes for different elements */ 41 #define CUBIC_PATH_DATA_SIZE 7 /* 1 opcode, 6 arguments */ 42 #define LINE_PATH_DATA_SIZE 3 /* 1 opcode, 2 arguments */ 43 #define MOVE_PATH_DATA_SIZE 3 /* 1 opcode, 2 arguments */ 44 #define END_PATH_DATA_SIZE 1 /* 1 opcode, 0 arguments */ 45 /* Maximum possible rectangle path size 46 * is in the rounded rectangle case: 47 * - 1 move for the path start 48 * - 4 cubics for the corners 49 * - 4 lines for the sides 50 * - 1 end for the path end */ 51 #define RECT_PATH_DATA_MAX_SIZE (1 * MOVE_PATH_DATA_SIZE + 4 * CUBIC_PATH_DATA_SIZE + 4 * LINE_PATH_DATA_SIZE + 1 * END_PATH_DATA_SIZE) 52 53 /* Maximum possible arc path size 54 * is in the rounded arc case: 55 * - 1 move for the path start 56 * - 16 cubics for the arc (5 inner, 5 outer) and corners (3 per corner) 57 * - 1 end for the path end */ 58 #define ARC_PATH_DATA_MAX_SIZE (1 * MOVE_PATH_DATA_SIZE + 16 * CUBIC_PATH_DATA_SIZE + 1 * END_PATH_DATA_SIZE) 59 /********************** 60 * TYPEDEFS 61 **********************/ 62 63 /********************** 64 * STATIC PROTOTYPES 65 **********************/ 66 67 /********************** 68 * GLOBAL PROTOTYPES 69 **********************/ 70 71 /** 72 * Generates path data for rectangle drawing. 73 * 74 * @param[in/out] path The path data to initialize 75 * @param[in/out] path_size The resulting size of the created path data 76 * @param[in] dsc The style descriptor for the rectangle to be drawn 77 * @param[in] coords The coordinates of the rectangle to be drawn 78 * 79 */ 80 void vglite_create_rect_path_data(int32_t * path_data, uint32_t * path_data_size, 81 int32_t radius, 82 const lv_area_t * coords); 83 84 /********************** 85 * MACROS 86 **********************/ 87 88 /********************** 89 * STATIC FUNCTIONS 90 **********************/ 91 92 #endif /*LV_USE_DRAW_VGLITE*/ 93 94 #ifdef __cplusplus 95 } /*extern "C"*/ 96 #endif 97 98 #endif /*LV_VGLITE_PATH_H*/ 99
