Tue, 08 Oct 2019 12:00:31 +0200
Initial import of the CO2 meter application.
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Initial import of the CO2 meter application.
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1 | /* |
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2 | |
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3 | u8g2_hvline.c |
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4 | |
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5 | Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) |
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6 | |
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7 | Copyright (c) 2016, olikraus@gmail.com |
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8 | All rights reserved. |
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9 | |
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10 | Redistribution and use in source and binary forms, with or without modification, |
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11 | are permitted provided that the following conditions are met: |
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12 | |
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13 | * Redistributions of source code must retain the above copyright notice, this list |
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14 | of conditions and the following disclaimer. |
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15 | |
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16 | * Redistributions in binary form must reproduce the above copyright notice, this |
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17 | list of conditions and the following disclaimer in the documentation and/or other |
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18 | materials provided with the distribution. |
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19 | |
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20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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21 | CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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22 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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23 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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24 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
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25 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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26 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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27 | NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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28 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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29 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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30 | STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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31 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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32 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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33 | |
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34 | |
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35 | Calltree |
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36 | |
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37 | void u8g2_DrawHVLine(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t len, uint8_t dir) |
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38 | u8g2->cb->draw_l90 |
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39 | u8g2_draw_hv_line_2dir |
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40 | u8g2->ll_hvline(u8g2, x, y, len, dir); |
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41 | |
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42 | |
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43 | */ |
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44 | |
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45 | #include "u8g2.h" |
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46 | #include <assert.h> |
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47 | |
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48 | /*==========================================================*/ |
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49 | /* intersection procedure */ |
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50 | |
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51 | /* |
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52 | Description: |
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53 | clip range from pos a (included) with line len (a+len excluded) agains c (included) to d (excluded) |
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54 | Assumptions: |
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55 | len > 0 |
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56 | c <= d (this is not checked) |
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57 | will return 0 if there is no intersection and if a > b |
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58 | |
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59 | */ |
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60 | |
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61 | static uint8_t u8g2_clip_intersection2(u8g2_uint_t *ap, u8g2_uint_t *len, u8g2_uint_t c, u8g2_uint_t d) |
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62 | { |
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63 | u8g2_uint_t a = *ap; |
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64 | u8g2_uint_t b; |
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65 | b = a; |
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66 | b += *len; |
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67 | |
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68 | /* |
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69 | Description: |
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70 | clip range from a (included) to b (excluded) agains c (included) to d (excluded) |
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71 | Assumptions: |
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72 | a <= b (violation is checked and handled correctly) |
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73 | c <= d (this is not checked) |
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74 | will return 0 if there is no intersection and if a > b |
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75 | |
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76 | optimized clipping: c is set to 0 --> 27 Oct 2018: again removed the c==0 assumption |
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77 | |
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78 | replaced by uint8_t u8g2_clip_intersection2 |
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79 | */ |
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80 | |
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81 | /* handle the a>b case correctly. If code and time is critical, this could */ |
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82 | /* be removed completly (be aware about memory curruption for wrong */ |
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83 | /* arguments) or return 0 for a>b (will lead to skipped lines for wrong */ |
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84 | /* arguments) */ |
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85 | |
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86 | /* removing the following if clause completly may lead to memory corruption of a>b */ |
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87 | if ( a > b ) |
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88 | { |
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89 | /* replacing this if with a simple "return 0;" will not handle the case with negative a */ |
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90 | if ( a < d ) |
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91 | { |
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92 | b = d; |
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93 | b--; |
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94 | } |
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95 | else |
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96 | { |
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97 | a = c; |
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98 | } |
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99 | } |
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100 | |
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101 | /* from now on, the asumption a <= b is ok */ |
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102 | |
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103 | if ( a >= d ) |
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104 | return 0; |
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105 | if ( b <= c ) |
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106 | return 0; |
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107 | if ( a < c ) |
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108 | a = c; |
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109 | if ( b > d ) |
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110 | b = d; |
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111 | |
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112 | *ap = a; |
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113 | b -= a; |
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114 | *len = b; |
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115 | return 1; |
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116 | } |
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117 | |
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118 | |
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119 | |
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120 | /*==========================================================*/ |
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121 | /* draw procedures */ |
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122 | |
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123 | /* |
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124 | x,y Upper left position of the line within the pixel buffer |
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125 | len length of the line in pixel, len must not be 0 |
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126 | dir 0: horizontal line (left to right) |
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127 | 1: vertical line (top to bottom) |
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128 | This function first adjusts the y position to the local buffer. Then it |
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129 | will clip the line and call u8g2_draw_low_level_hv_line() |
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130 | |
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131 | */ |
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132 | void u8g2_draw_hv_line_2dir(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t len, uint8_t dir) |
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133 | { |
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134 | |
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135 | /* clipping happens before the display rotation */ |
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136 | |
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137 | /* transform to pixel buffer coordinates */ |
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138 | y -= u8g2->pixel_curr_row; |
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139 | |
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140 | u8g2->ll_hvline(u8g2, x, y, len, dir); |
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141 | } |
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142 | |
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143 | |
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144 | /* |
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145 | This is the toplevel function for the hv line draw procedures. |
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146 | This function should be called by the user. |
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147 | |
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148 | "dir" may have 4 directions: 0 (left to right), 1, 2, 3 (down up) |
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149 | */ |
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150 | void u8g2_DrawHVLine(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t len, uint8_t dir) |
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151 | { |
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152 | /* Make a call to the callback function (e.g. u8g2_draw_l90_r0). */ |
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153 | /* The callback may rotate the hv line */ |
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154 | /* after rotation this will call u8g2_draw_hv_line_4dir() */ |
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155 | |
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156 | #ifdef U8G2_WITH_CLIP_WINDOW_SUPPORT |
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157 | if ( u8g2->is_page_clip_window_intersection != 0 ) |
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158 | #endif /* U8G2_WITH_CLIP_WINDOW_SUPPORT */ |
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159 | if ( len != 0 ) |
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160 | { |
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161 | |
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162 | /* convert to two directions */ |
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163 | if ( len > 1 ) |
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164 | { |
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165 | if ( dir == 2 ) |
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166 | { |
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167 | x -= len; |
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168 | x++; |
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169 | } |
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170 | else if ( dir == 3 ) |
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171 | { |
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172 | y -= len; |
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173 | y++; |
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174 | } |
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175 | } |
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176 | dir &= 1; |
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177 | |
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178 | /* clip against the user window */ |
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179 | if ( dir == 0 ) |
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180 | { |
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181 | if ( y < u8g2->user_y0 ) |
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182 | return; |
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183 | if ( y >= u8g2->user_y1 ) |
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184 | return; |
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185 | if ( u8g2_clip_intersection2(&x, &len, u8g2->user_x0, u8g2->user_x1) == 0 ) |
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186 | return; |
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187 | } |
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188 | else |
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189 | { |
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190 | if ( x < u8g2->user_x0 ) |
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191 | return; |
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192 | if ( x >= u8g2->user_x1 ) |
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193 | return; |
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194 | if ( u8g2_clip_intersection2(&y, &len, u8g2->user_y0, u8g2->user_y1) == 0 ) |
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195 | return; |
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196 | } |
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197 | |
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198 | |
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199 | u8g2->cb->draw_l90(u8g2, x, y, len, dir); |
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200 | } |
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201 | } |
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202 | |
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203 | void u8g2_DrawHLine(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t len) |
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204 | { |
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205 | // #ifdef U8G2_WITH_INTERSECTION |
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206 | // if ( u8g2_IsIntersection(u8g2, x, y, x+len, y+1) == 0 ) |
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207 | // return; |
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208 | // #endif /* U8G2_WITH_INTERSECTION */ |
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209 | u8g2_DrawHVLine(u8g2, x, y, len, 0); |
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210 | } |
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211 | |
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212 | void u8g2_DrawVLine(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t len) |
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213 | { |
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214 | // #ifdef U8G2_WITH_INTERSECTION |
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215 | // if ( u8g2_IsIntersection(u8g2, x, y, x+1, y+len) == 0 ) |
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216 | // return; |
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217 | // #endif /* U8G2_WITH_INTERSECTION */ |
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218 | u8g2_DrawHVLine(u8g2, x, y, len, 1); |
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219 | } |
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220 | |
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221 | void u8g2_DrawPixel(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y) |
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222 | { |
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223 | #ifdef U8G2_WITH_INTERSECTION |
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224 | if ( y < u8g2->user_y0 ) |
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225 | return; |
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226 | if ( y >= u8g2->user_y1 ) |
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227 | return; |
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228 | if ( x < u8g2->user_x0 ) |
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229 | return; |
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230 | if ( x >= u8g2->user_x1 ) |
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231 | return; |
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232 | #endif /* U8G2_WITH_INTERSECTION */ |
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233 | u8g2_DrawHVLine(u8g2, x, y, 1, 0); |
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234 | } |
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235 | |
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236 | /* |
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237 | Assign the draw color for all drawing functions. |
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238 | color may be 0 or 1. The actual color is defined by the display. |
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239 | With color = 1 the drawing function will set the display memory to 1. |
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240 | For OLEDs this ususally means, that the pixel is enabled and the LED |
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241 | at the pixel is turned on. |
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242 | On an LCD it usually means that the LCD segment of the pixel is enabled, |
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243 | which absorbs the light. |
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244 | For eInk/ePaper it means black ink. |
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245 | |
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246 | 7 Jan 2017: Allow color value 2 for XOR operation. |
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247 | |
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248 | */ |
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249 | void u8g2_SetDrawColor(u8g2_t *u8g2, uint8_t color) |
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250 | { |
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251 | u8g2->draw_color = color; /* u8g2_SetDrawColor: just assign the argument */ |
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252 | if ( color >= 3 ) |
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253 | u8g2->draw_color = 1; /* u8g2_SetDrawColor: make color as one if arg is invalid */ |
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254 | } |
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255 |