1 /* 2 * Copyright (c) 2018 PHYTEC Messtechnik GmbH 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /** 8 * @file 9 * @brief Public Monochrome Character Framebuffer API 10 */ 11 12 #ifndef __CFB_H__ 13 #define __CFB_H__ 14 15 #include <zephyr/device.h> 16 #include <zephyr/drivers/display.h> 17 #include <zephyr/sys/iterable_sections.h> 18 19 #ifdef __cplusplus 20 extern "C" { 21 #endif 22 23 /** 24 * @brief Public Monochrome Character Framebuffer API 25 * @defgroup monochrome_character_framebuffer Monochrome Character Framebuffer 26 * @ingroup utilities 27 * @{ 28 */ 29 30 enum cfb_display_param { 31 CFB_DISPLAY_HEIGH = 0, 32 CFB_DISPLAY_WIDTH, 33 CFB_DISPLAY_PPT, 34 CFB_DISPLAY_ROWS, 35 CFB_DISPLAY_COLS, 36 }; 37 38 enum cfb_font_caps { 39 CFB_FONT_MONO_VPACKED = BIT(0), 40 CFB_FONT_MONO_HPACKED = BIT(1), 41 CFB_FONT_MSB_FIRST = BIT(2), 42 }; 43 44 struct cfb_font { 45 const void *data; 46 enum cfb_font_caps caps; 47 uint8_t width; 48 uint8_t height; 49 uint8_t first_char; 50 uint8_t last_char; 51 }; 52 53 struct cfb_position { 54 uint16_t x; 55 uint16_t y; 56 }; 57 58 /** 59 * @brief Macro for creating a font entry. 60 * 61 * @param _name Name of the font entry. 62 * @param _width Width of the font in pixels 63 * @param _height Height of the font in pixels. 64 * @param _caps Font capabilities. 65 * @param _data Raw data of the font. 66 * @param _fc Character mapped to first font element. 67 * @param _lc Character mapped to last font element. 68 */ 69 #define FONT_ENTRY_DEFINE(_name, _width, _height, _caps, _data, _fc, _lc) \ 70 static const STRUCT_SECTION_ITERABLE(cfb_font, _name) = { \ 71 .data = _data, \ 72 .caps = _caps, \ 73 .width = _width, \ 74 .height = _height, \ 75 .first_char = _fc, \ 76 .last_char = _lc, \ 77 } 78 79 /** 80 * @brief Print a string into the framebuffer. 81 * 82 * @param dev Pointer to device structure for driver instance 83 * @param str String to print 84 * @param x Position in X direction of the beginning of the string 85 * @param y Position in Y direction of the beginning of the string 86 * 87 * @return 0 on success, negative value otherwise 88 */ 89 int cfb_print(const struct device *dev, const char *const str, uint16_t x, uint16_t y); 90 91 /** 92 * @brief Print a string into the framebuffer. 93 * For compare to cfb_print, cfb_draw_text accept non tile-aligned coords 94 * and not line wrapping. 95 * 96 * @param dev Pointer to device structure for driver instance 97 * @param str String to print 98 * @param x Position in X direction of the beginning of the string 99 * @param y Position in Y direction of the beginning of the string 100 * 101 * @return 0 on success, negative value otherwise 102 */ 103 int cfb_draw_text(const struct device *dev, const char *const str, int16_t x, int16_t y); 104 105 /** 106 * @brief Draw a point. 107 * 108 * @param dev Pointer to device structure for driver instance 109 * @param pos position of the point 110 * 111 * @return 0 on success, negative value otherwise 112 */ 113 int cfb_draw_point(const struct device *dev, const struct cfb_position *pos); 114 115 /** 116 * @brief Draw a line. 117 * 118 * @param dev Pointer to device structure for driver instance 119 * @param start start position of the line 120 * @param end end position of the line 121 * 122 * @return 0 on success, negative value otherwise 123 */ 124 int cfb_draw_line(const struct device *dev, const struct cfb_position *start, 125 const struct cfb_position *end); 126 127 /** 128 * @brief Draw a rectangle. 129 * 130 * @param dev Pointer to device structure for driver instance 131 * @param start Top-Left position of the rectangle 132 * @param end Bottom-Right position of the rectangle 133 * 134 * @return 0 on success, negative value otherwise 135 */ 136 int cfb_draw_rect(const struct device *dev, const struct cfb_position *start, 137 const struct cfb_position *end); 138 139 /** 140 * @brief Clear framebuffer. 141 * 142 * @param dev Pointer to device structure for driver instance 143 * @param clear_display Clear the display as well 144 * 145 * @return 0 on success, negative value otherwise 146 */ 147 int cfb_framebuffer_clear(const struct device *dev, bool clear_display); 148 149 /** 150 * @brief Invert Pixels. 151 * 152 * @param dev Pointer to device structure for driver instance 153 * 154 * @return 0 on success, negative value otherwise 155 */ 156 int cfb_framebuffer_invert(const struct device *dev); 157 158 /** 159 * @brief Invert Pixels in selected area. 160 * 161 * @param dev Pointer to device structure for driver instance 162 * @param x Position in X direction of the beginning of area 163 * @param y Position in Y direction of the beginning of area 164 * @param width Width of area in pixels 165 * @param height Height of area in pixels 166 * 167 * @return 0 on success, negative value otherwise 168 */ 169 int cfb_invert_area(const struct device *dev, uint16_t x, uint16_t y, 170 uint16_t width, uint16_t height); 171 172 /** 173 * @brief Finalize framebuffer and write it to display RAM, 174 * invert or reorder pixels if necessary. 175 * 176 * @param dev Pointer to device structure for driver instance 177 * 178 * @return 0 on success, negative value otherwise 179 */ 180 int cfb_framebuffer_finalize(const struct device *dev); 181 182 /** 183 * @brief Get display parameter. 184 * 185 * @param dev Pointer to device structure for driver instance 186 * @param cfb_display_param One of the display parameters 187 * 188 * @return Display parameter value 189 */ 190 int cfb_get_display_parameter(const struct device *dev, 191 enum cfb_display_param); 192 193 /** 194 * @brief Set font. 195 * 196 * @param dev Pointer to device structure for driver instance 197 * @param idx Font index 198 * 199 * @return 0 on success, negative value otherwise 200 */ 201 int cfb_framebuffer_set_font(const struct device *dev, uint8_t idx); 202 203 /** 204 * @brief Set font kerning (spacing between individual letters). 205 * 206 * @param dev Pointer to device structure for driver instance 207 * @param kerning Font kerning 208 * 209 * @return 0 on success, negative value otherwise 210 */ 211 int cfb_set_kerning(const struct device *dev, int8_t kerning); 212 213 /** 214 * @brief Get font size. 215 * 216 * @param dev Pointer to device structure for driver instance 217 * @param idx Font index 218 * @param width Pointers to the variable where the font width will be stored. 219 * @param height Pointers to the variable where the font height will be stored. 220 * 221 * @return 0 on success, negative value otherwise 222 */ 223 int cfb_get_font_size(const struct device *dev, uint8_t idx, uint8_t *width, 224 uint8_t *height); 225 226 /** 227 * @brief Get number of fonts. 228 * 229 * @param dev Pointer to device structure for driver instance 230 * 231 * @return number of fonts 232 */ 233 int cfb_get_numof_fonts(const struct device *dev); 234 235 /** 236 * @brief Initialize Character Framebuffer. 237 * 238 * @param dev Pointer to device structure for driver instance 239 * 240 * @return 0 on success, negative value otherwise 241 */ 242 int cfb_framebuffer_init(const struct device *dev); 243 244 #ifdef __cplusplus 245 } 246 #endif 247 248 /** 249 * @} 250 */ 251 252 #endif /* __CFB_H__ */ 253
