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1 /** |
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2 * @file tft.h |
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3 * @brief High level TFT functions |
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4 * @author LoBo 04/2017 |
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5 * @see https://github.com/loboris |
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6 */ |
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7 |
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8 #ifndef _TFT_H_ |
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9 #define _TFT_H_ |
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10 |
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11 #include <stdlib.h> |
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12 #include "tftspi.h" |
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13 |
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14 typedef struct { |
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15 uint16_t x1; |
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16 uint16_t y1; |
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17 uint16_t x2; |
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18 uint16_t y2; |
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19 } dispWin_t; |
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20 |
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21 typedef struct { |
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22 uint8_t *font; |
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23 uint8_t x_size; |
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24 uint8_t y_size; |
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25 uint8_t offset; |
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26 uint16_t numchars; |
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27 uint16_t size; |
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28 uint8_t max_x_size; |
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29 uint8_t bitmap; |
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30 color_t color; |
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31 } Font; |
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32 |
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33 |
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34 //========================================================================================== |
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35 // ==== Global variables =================================================================== |
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36 //========================================================================================== |
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37 extern uint8_t orientation; ///< current screen orientation |
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38 extern uint16_t font_rotate; ///< current font font_rotate angle (0~395) |
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39 extern uint8_t font_transparent; ///< if not 0 draw fonts transparent |
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40 extern uint8_t font_forceFixed; ///< if not zero force drawing proportional fonts with fixed width |
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41 extern uint8_t font_buffered_char; |
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42 extern uint8_t font_line_space; ///< additional spacing between text lines; added to font height |
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43 extern uint8_t text_wrap; ///< if not 0 wrap long text to the new line, else clip |
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44 extern color_t _fg; ///< current foreground color for fonts |
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45 extern color_t _bg; ///< current background for non transparent fonts |
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46 extern dispWin_t dispWin; ///< display clip window |
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47 extern float _angleOffset; ///< angle offset for arc, polygon and line by angle functions |
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48 extern uint8_t image_debug; ///< print debug messages during image decode if set to 1 |
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49 |
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50 extern Font cfont; ///< Current font structure |
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51 |
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52 extern int TFT_X; ///< X position of the next character after TFT_print() function |
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53 extern int TFT_Y; ///< Y position of the next character after TFT_print() function |
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54 |
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55 // ========================================================================================= |
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56 |
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57 |
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58 // Buffer is created during jpeg decode for sending data |
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59 // Total size of the buffer is 2 * (JPG_IMAGE_LINE_BUF_SIZE * 3) |
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60 // The size must be multiple of 256 bytes !! |
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61 #define JPG_IMAGE_LINE_BUF_SIZE 512 |
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62 |
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63 // --- Constants for ellipse function --- |
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64 #define TFT_ELLIPSE_UPPER_RIGHT 0x01 |
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65 #define TFT_ELLIPSE_UPPER_LEFT 0x02 |
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66 #define TFT_ELLIPSE_LOWER_LEFT 0x04 |
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67 #define TFT_ELLIPSE_LOWER_RIGHT 0x08 |
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68 |
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69 // Constants for Arc function |
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70 // number representing the maximum angle (e.g. if 100, then if you pass in start=0 and end=50, you get a half circle) |
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71 // this can be changed with setArcParams function at runtime |
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72 #define DEFAULT_ARC_ANGLE_MAX 360 |
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73 // rotational offset in degrees defining position of value 0 (-90 will put it at the top of circle) |
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74 // this can be changed with setAngleOffset function at runtime |
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75 #define DEFAULT_ANGLE_OFFSET -90 |
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76 |
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77 #define PI 3.14159265359 |
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78 |
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79 #define MIN_POLIGON_SIDES 3 |
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80 #define MAX_POLIGON_SIDES 60 |
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81 |
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82 // === Color names constants === |
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83 extern const color_t TFT_BLACK; |
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84 extern const color_t TFT_NAVY; |
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85 extern const color_t TFT_DARKGREEN; |
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86 extern const color_t TFT_DARKCYAN; |
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87 extern const color_t TFT_MAROON; |
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88 extern const color_t TFT_PURPLE; |
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89 extern const color_t TFT_OLIVE; |
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90 extern const color_t TFT_LIGHTGREY; |
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91 extern const color_t TFT_DARKGREY; |
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92 extern const color_t TFT_BLUE; |
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93 extern const color_t TFT_GREEN; |
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94 extern const color_t TFT_CYAN; |
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95 extern const color_t TFT_RED; |
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96 extern const color_t TFT_MAGENTA; |
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97 extern const color_t TFT_YELLOW; |
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98 extern const color_t TFT_WHITE; |
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99 extern const color_t TFT_ORANGE; |
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100 extern const color_t TFT_GREENYELLOW; |
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101 extern const color_t TFT_PINK; |
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102 |
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103 // === Color invert constants === |
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104 #define INVERT_ON 1 |
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105 #define INVERT_OFF 0 |
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106 |
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107 // === Special coordinates constants === |
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108 #define CENTER -9003 |
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109 #define RIGHT -9004 |
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110 #define BOTTOM -9004 |
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111 |
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112 #define LASTX 7000 |
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113 #define LASTY 8000 |
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114 |
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115 // === Embedded fonts constants === |
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116 #define DEFAULT_FONT 0 ///< 12 points 95 characters DejaVu font. |
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117 #define DEJAVU18_FONT 1 ///< 18 points 95 characters DejaVuSans font. |
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118 #define DEJAVU24_FONT 2 ///< 24 points 95 characters DejaVu font. |
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119 #define UBUNTU16_FONT 3 ///< 16 points 95 characters Ubuntu font. |
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120 #define COMIC24_FONT 4 ///< 24 points 95 characters Comic font. |
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121 #define MINYA24_FONT 5 ///< 24 points 95 characters Minya font. |
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122 #define TOONEY32_FONT 6 ///< 32 points 95 characters Tooney font. |
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123 #define SMALL_FONT 7 ///< 8x12 pixels 95 characters fixed font. |
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124 #define DEF_SMALL_FONT 8 ///< 9 points 95 characters font. |
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125 #define FONT_7SEG 9 ///< Variable size 14 characters 7 segment font. |
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126 #define USER_FONT 10 ///< font will be read from file |
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127 |
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128 |
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129 |
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130 // ===== PUBLIC FUNCTIONS ========================================================================= |
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131 |
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132 |
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133 /** |
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134 * @brief Draw pixel at given x,y coordinates |
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135 * @param x horizontal position |
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136 * @param y vertical position |
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137 * @param color pixel color |
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138 * @param sel if not 0 activate CS before and deactivat after sending pixel data to display |
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139 * when sending multiple pixels it is faster to activate the CS first, |
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140 * send all pixels an deactivate CS after all pixela was sent |
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141 */ |
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142 void TFT_drawPixel(int16_t x, int16_t y, color_t color, uint8_t sel); |
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143 |
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144 /** |
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145 * @brief Read pixel color value from display GRAM at given x,y coordinates |
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146 * @param[in] x horizontal position |
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147 * @param[in] y vertical position |
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148 */ |
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149 color_t TFT_readPixel(int16_t x, int16_t y); |
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150 |
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151 /** |
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152 * @brief Draw vertical line at given x,y coordinates |
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153 * |
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154 * @param x horizontal start position |
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155 * @param y vertical start position |
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156 * @param h line height in pixels |
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157 * @param color line color |
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158 */ |
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159 void TFT_drawFastVLine(int16_t x, int16_t y, int16_t h, color_t color); |
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160 |
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161 /** |
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162 * @brief Draw horizontal line at given x,y coordinates |
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163 * |
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164 * @param x horizontal start position |
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165 * @param y vertical start position |
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166 * @param w line width in pixels |
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167 * @param color line color |
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168 */ |
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169 void TFT_drawFastHLine(int16_t x, int16_t y, int16_t w, color_t color); |
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170 |
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171 /** |
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172 * @brief Draw line on screen |
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173 * |
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174 * @param x0 horizontal start position |
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175 * @param y0 vertical start position |
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176 * @param x1 horizontal end position |
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177 * @param y1 vertical end position |
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178 * @param color line color |
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179 */ |
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180 void TFT_drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, color_t color); |
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181 |
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182 |
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183 /** |
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184 * @brief Draw line on screen from (x,y) point at given angle |
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185 * Line drawing angle starts at lower right quadrant of the screen and is offseted by |
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186 * '_angleOffset' global variable (default: -90 degrees) |
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187 * |
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188 * @param x horizontal start position |
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189 * @param y vertical start position |
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190 * @param start start offset from (x,y) |
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191 * @param len length of the line |
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192 * @param angle line angle in degrees |
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193 * @param color line color |
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194 */ |
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195 void TFT_drawLineByAngle(uint16_t x, uint16_t y, uint16_t start, uint16_t len, uint16_t angle, color_t color); |
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196 |
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197 /** |
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198 * @brief Fill given rectangular screen region with color |
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199 * |
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200 * @param x horizontal rect start position |
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201 * @param y vertical rect start position |
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202 * @param w rectangle width |
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203 * @param h rectangle height |
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204 * @param color fill color |
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205 */ |
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206 void TFT_fillRect(int16_t x, int16_t y, int16_t w, int16_t h, color_t color); |
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207 |
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208 /** |
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209 * @brief Draw rectangle on screen |
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210 * |
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211 * @param x horizontal rect start position |
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212 * @param y vertical rect start position |
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213 * @param w rectangle width |
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214 * @param h rectangle height |
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215 * @param color rect line color |
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216 */ |
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217 void TFT_drawRect(uint16_t x1,uint16_t y1,uint16_t w,uint16_t h, color_t color); |
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218 |
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219 /** |
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220 * @brief Draw rectangle with rounded corners on screen |
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221 * |
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222 * @param x horizontal rect start position |
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223 * @param y vertical rect start position |
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224 * @param w rectangle width |
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225 * @param h rectangle height |
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226 * @param r corner radius |
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227 * @param color rectangle color |
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228 */ |
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229 void TFT_drawRoundRect(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t r, color_t color); |
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230 |
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231 /** |
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232 * @brief Fill given rectangular screen region with rounded corners with color |
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233 * |
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234 * @param x horizontal rect start position |
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235 * @param y vertical rect start position |
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236 * @param w rectangle width |
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237 * @param h rectangle height |
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238 * @param r corner radius |
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239 * @param color fill color |
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240 */ |
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241 void TFT_fillRoundRect(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t r, color_t color); |
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242 |
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243 /** |
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244 * @brief Fill the whole screen with color |
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245 * |
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246 * @param color fill color |
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247 */ |
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248 void TFT_fillScreen(color_t color); |
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249 |
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250 /** |
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251 * @brief Fill the current clip window with color |
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252 * |
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253 * @param color fill color |
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254 */ |
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255 void TFT_fillWindow(color_t color); |
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256 |
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257 /** |
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258 * @brief Draw triangle on screen |
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259 * |
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260 * @param x0 first triangle point x position |
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261 * @param y0 first triangle point y position |
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262 * @param x0 second triangle point x position |
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263 * @param y0 second triangle point y position |
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264 * @param x0 third triangle point x position |
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265 * @param y0 third triangle point y position |
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266 * @param color triangle color |
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267 */ |
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268 void TFT_drawTriangle(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, color_t color); |
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269 |
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270 /** |
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271 * @brief Fill triangular screen region with color |
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272 * |
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273 * @param x0 first triangle point x position |
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274 * @param y0 first triangle point y position |
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275 * @param x0 second triangle point x position |
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276 * @param y0 second triangle point y position |
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277 * @param x0 third triangle point x position |
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278 * @param y0 third triangle point y position |
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279 * @param color fill color |
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280 */ |
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281 void TFT_fillTriangle(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, color_t color); |
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282 |
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283 /** |
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284 * @brief Draw circle on screen |
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285 * |
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286 * @param x circle center x position |
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287 * @param y circle center x position |
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288 * @param r circle radius |
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289 * @param color circle color |
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290 */ |
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291 void TFT_drawCircle(int16_t x, int16_t y, int radius, color_t color); |
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292 |
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293 /** |
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294 * @brief Fill circle on screen with color |
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295 * |
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296 * @param x circle center x position |
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297 * @param y circle center x position |
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298 * @param r circle radius |
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299 * @param color circle fill color |
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300 */ |
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301 void TFT_fillCircle(int16_t x, int16_t y, int radius, color_t color); |
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302 |
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303 /** |
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304 * @brief Draw ellipse on screen |
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305 * |
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306 * @param x0 ellipse center x position |
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307 * @param y0 ellipse center x position |
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308 * @param rx ellipse horizontal radius |
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309 * @param ry ellipse vertical radius |
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310 * @param option drawing options, multiple options can be combined |
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311 * |
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312 * 1 (TFT_ELLIPSE_UPPER_RIGHT) draw upper right corner |
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313 * 2 (TFT_ELLIPSE_UPPER_LEFT) draw upper left corner |
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314 * 4 (TFT_ELLIPSE_LOWER_LEFT) draw lower left corner |
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315 * 8 (TFT_ELLIPSE_LOWER_RIGHT) draw lower right corner |
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316 * to draw the whole ellipse use option value 15 (1 | 2 | 4 | 8) |
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317 * @param color: circle color |
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318 */ |
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319 void TFT_drawEllipse(uint16_t x0, uint16_t y0, uint16_t rx, uint16_t ry, color_t color, uint8_t option); |
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320 |
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321 /** |
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322 * @brief Fill elliptical region on screen |
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323 * |
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324 * @param x0 ellipse center x position |
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325 * @param y0 ellipse center x position |
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326 * @param rx ellipse horizontal radius |
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327 * @param ry ellipse vertical radius |
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328 * @param option drawing options, multiple options can be combined |
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329 * |
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330 * 1 (TFT_ELLIPSE_UPPER_RIGHT) fill upper right corner |
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331 * 2 (TFT_ELLIPSE_UPPER_LEFT) fill upper left corner |
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332 * 4 (TFT_ELLIPSE_LOWER_LEFT) fill lower left corner |
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333 * 8 (TFT_ELLIPSE_LOWER_RIGHT) fill lower right corner |
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334 * to fill the whole ellipse use option value 15 (1 | 2 | 4 | 8) |
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335 * @param color fill color |
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336 */ |
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337 void TFT_fillEllipse(uint16_t x0, uint16_t y0, uint16_t rx, uint16_t ry, color_t color, uint8_t option); |
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338 |
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339 |
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340 /** |
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341 * @brief Draw circle arc on screen |
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342 * Arc drawing angle starts at lower right quadrant of the screen and is offseted by |
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343 * '_angleOffset' global variable (default: -90 degrees) |
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344 * |
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345 * @param cx arc center X position |
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346 * @param cy arc center Y position |
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347 * @param th thickness of the drawn arc |
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348 * @param ry arc vertical radius |
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349 * @param start arc start angle in degrees |
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350 * @param end arc end angle in degrees |
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351 * @param color arc outline color |
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352 * @param fillcolor arc fill color |
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353 */ |
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354 void TFT_drawArc(uint16_t cx, uint16_t cy, uint16_t r, uint16_t th, float start, float end, color_t color, color_t fillcolor); |
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355 |
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356 /** |
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357 * @brief Draw polygon on screen |
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358 * |
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359 * @param cx polygon center X position |
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360 * @param cy arc center Y position |
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361 * @param sides number of polygon sides; MAX_POLIGON_SIDES ~ MAX_POLIGON_SIDES (3 ~ 60) |
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362 * @param diameter diameter of the circle inside which the polygon is drawn |
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363 * @param color polygon outline color |
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364 * @param fill polygon fill color; if same as color, polygon is not filled |
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365 * @param deg polygon rotation angle; 0 ~ 360 |
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366 * @param th thickness of the polygon outline |
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367 */ |
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368 void TFT_drawPolygon(int cx, int cy, int sides, int diameter, color_t color, color_t fill, int deg, uint8_t th); |
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369 |
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370 /** |
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371 * @brief Set the font used for writing the text to display. |
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372 * |
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373 * ------------------------------------------------------------------------------------ |
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374 * For 7 segment font only characters 0,1,2,3,4,5,6,7,8,9, . , - , : , / are available. |
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375 * Character ‘/‘ draws the degree sign. |
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376 * ------------------------------------------------------------------------------------ |
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377 * |
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378 * @param font font number; use defined font names |
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379 * @param font_file pointer to font file name; NULL for embeded fonts |
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380 */ |
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381 void TFT_setFont(uint8_t font, const char *font_file); |
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382 |
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383 /** |
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384 * @brief Returns current font height & width in pixels. |
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385 * |
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386 * @param[in] width pointer to returned font width |
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387 * @param[in] height pointer to returned font height |
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388 */ |
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389 int TFT_getfontsize(int *width, int* height); |
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390 |
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391 /** |
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392 * @brief Returns current font height in pixels. |
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393 * @return The font height in pixels. |
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394 */ |
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395 int TFT_getfontheight(); |
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396 |
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397 /** |
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398 * @brief Write text to display. |
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399 * |
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400 * Rotation of the displayed text depends on 'font_rotate' variable (0~360) |
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401 * if 'font_transparent' variable is set to 1, no background pixels will be printed |
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402 * |
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403 * If the text does not fit the screen width it will be clipped (if text_wrap=0), |
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404 * or continued on next line (if text_wrap=1) |
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405 * |
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406 * Two special characters are allowed in strings: |
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407 * |
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408 * ‘\r’ CR (0x0D), clears the display to EOL |
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409 * ‘\n’ LF (ox0A), continues to the new line, x=0 |
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410 * |
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411 * @param st pointer to null terminated string to be printed |
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412 * @param x horizontal position of the upper left point in pixels. Special values can be entered: |
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413 * |
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414 * CENTER, centers the text |
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415 * RIGHT, right justifies the text |
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416 * LASTX, continues from last X position; offset can be used: LASTX+n |
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417 * |
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418 * @param y vertical position of the upper left point in pixels. Special values can be entered: |
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419 * |
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420 * CENTER, centers the text |
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421 * BOTTOM, bottom justifies the text |
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422 * LASTY, continues from last Y position; offset can be used: LASTY+n |
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423 * |
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424 */ |
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425 void TFT_print(char *st, int x, int y); |
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426 |
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427 /** |
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428 * @brief Set atributes for 7 segment vector font |
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429 * @note 7 segment font must be the current font to this function to have effect |
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430 * |
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431 * @param l 6~40; distance between bars in pixels |
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432 * @param w 1~12, max l/2; bar width in pixels |
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433 * @param outline draw font outline if set to 1 |
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434 * @param color font outline color, only used if outline=1 |
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435 */ |
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436 void set_7seg_font_atrib(uint8_t l, uint8_t w, int outline, color_t color); |
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437 |
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438 /** |
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439 * @brief Sets the clipping area coordinates. |
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440 * All writing to screen is clipped to that area. |
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441 * Starting x & y in all functions will be adjusted to the clipping area. |
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442 * |
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443 * @param x1,y1 upper left point of the clipping area |
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444 * @param x2,y2 bottom right point of the clipping area |
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445 */ |
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446 void TFT_setclipwin(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2); |
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447 |
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448 /** |
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449 * @brief Resets the clipping area to full screen (0,0),(_wodth,_height) |
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450 */ |
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451 void TFT_resetclipwin(); |
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452 |
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453 /** |
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454 * @brief Save current clipping area to temporary variable |
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455 */ |
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456 void TFT_saveClipWin(); |
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457 |
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458 /** |
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459 * @brief Restore current clipping area from temporary variable |
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460 */ |
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461 void TFT_restoreClipWin(); |
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462 |
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463 /** |
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464 * @brief Set the screen rotation |
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465 * Also resets the clip window and clears the screen with current background color |
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466 * |
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467 * @param rot 0~3; screen rotation; use defined rotation constants: |
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468 * PORTRAIT, LANDSCAPE, PORTRAIT_FLIP, LANDSCAPE_FLIP |
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469 */ |
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470 void TFT_setRotation(uint8_t rot); |
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471 |
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472 /** |
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473 * @brief Set inverted/normal colors |
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474 * |
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475 * @param mode 0 or 1; use defined constants: INVERT_ON or INVERT_OFF |
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476 */ |
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477 void TFT_invertDisplay(const uint8_t mode); |
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478 |
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479 /** |
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480 * @brief Select gamma curve |
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481 * @param gm gama curve, values 0~3 |
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482 */ |
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483 void TFT_setGammaCurve(uint8_t gm); |
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484 |
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485 /** |
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486 * @brief Compare two color structures |
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487 * @return 0 if equal, 1 if not equal |
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488 * |
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489 * @param c1, c2 colors to be compared |
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490 */ |
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491 int TFT_compare_colors(color_t c1, color_t c2); |
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492 |
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493 /** |
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494 * @brief returns the string width in pixels. Useful for positions strings on the screen. |
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495 * @return The string width. |
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496 */ |
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497 int TFT_getStringWidth(char* str); |
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498 |
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499 |
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500 /** |
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501 * @brief Fills the rectangle occupied by string with current background color |
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502 * @param x X position |
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503 * @param Y Y position |
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504 * @param str The string |
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505 */ |
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506 void TFT_clearStringRect(int x, int y, char *str); |
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507 |
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508 /** |
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509 * @brief Converts the components of a color, as specified by the HSB model, |
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510 * to an equivalent set of values for the default RGB model. |
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511 * |
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512 * The color structure that is returned by HSBtoRGB encodes the value of a color as R, G & B component |
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513 * |
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514 * @param _hue any number, the floor of this number is subtracted from it to create a fraction between 0 and 1. |
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515 * This fractional number is then multiplied by 360 to produce the hue angle in the HSB color model. |
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516 * @param _sat 0 ~ 1.0 |
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517 * @param _brightness 0 ~ 1.0 |
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518 */ |
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519 color_t HSBtoRGB(float _hue, float _sat, float _brightness); |
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520 |
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521 /** |
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522 * @brief Decodes and displays JPG image |
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523 * Limits: |
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524 * Baseline only. Progressive and Lossless JPEG format are not supported. |
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525 * Image size: Up to 65520 x 65520 pixels |
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526 * Color space: YCbCr three components only. Gray scale image is not supported. |
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527 * Sampling factor: 4:4:4, 4:2:2 or 4:2:0. |
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528 * |
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529 * @param x image left position; constants CENTER & RIGHT can be used; negative value is accepted |
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530 * @param y image top position; constants CENTER & BOTTOM can be used; negative value is accepted |
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531 * @param scale image scale factor: 0~3; if scale>0, image is scaled by factor 1/(2^scale) (1/2, 1/4 or 1/8) |
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532 * @param fname pointer to the name of the file from which the image will be read |
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533 * if set to NULL, image will be read from memory buffer pointed to by 'buf' |
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534 * @param buf pointer to the memory buffer from which the image will be read; used if fname=NULL |
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535 * @param size size of the memory buffer from which the image will be read; used if fname=NULL & buf!=NULL |
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536 */ |
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537 void TFT_jpg_image(int x, int y, uint8_t scale, char *fname, uint8_t *buf, int size); |
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538 |
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539 /** |
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540 * @brief Decodes and displays BMP image |
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541 * Only uncompressed RGB 24-bit with no color space information BMP images can be displayed |
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542 * |
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543 * @param x image left position; constants CENTER & RIGHT can be used; negative value is accepted |
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544 * @param y image top position; constants CENTER & BOTTOM can be used; negative value is accepted |
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545 * @param scale image scale factor: 0~7; if scale>0, image is scaled by factor 1/(scale+1) |
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546 * @param fname pointer to the name of the file from which the image will be read |
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547 * if set to NULL, image will be read from memory buffer pointed to by 'imgbuf' |
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548 * @param imgbuf pointer to the memory buffer from which the image will be read; used if fname=NULL |
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549 * @param size size of the memory buffer from which the image will be read; used if fname=NULL & imgbuf!=NULL |
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550 */ |
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551 int TFT_bmp_image(int x, int y, uint8_t scale, char *fname, uint8_t *imgbuf, int size); |
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552 |
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553 /** |
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554 * @brief Get the touch panel coordinates. |
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555 * The coordinates are adjusted to screen orientation if raw=0 |
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556 * |
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557 * @param[in] x pointer to X coordinate |
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558 * @param[in] y pointer to Y coordinate |
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559 * @param raw if 0 returns calibrated screen coordinates; if 1 returns raw touch controller coordinates |
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560 * @return 0 if touch panel is not touched; x=y=0 |
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561 * 1 if touch panel is touched; x&y are the valid coordinates |
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562 */ |
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563 int TFT_read_touch(int *x, int* y, uint8_t raw); |
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564 |
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565 |
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566 /** |
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567 * @brief Compile font c source file to .fnt file |
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568 * which can be used in TFT_setFont() function to select external font |
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569 * Created file have the same name as source file and extension .fnt |
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570 * |
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571 * @param fontfile pointer to c source font file name; must have .c extension |
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572 * @param dbg if set to 1, prints debug information |
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573 * |
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574 * @return 0 on success, err no on error |
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575 */ |
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576 int compile_font_file(char *fontfile, uint8_t dbg); |
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577 |
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578 /** |
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579 * @brief Get all font's characters to buffer |
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580 */ |
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581 void getFontCharacters(uint8_t *buf); |
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582 |
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583 #endif |