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.
Michiel Broek <mbroek@mbse.eu>
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1 | /* |
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2 | |
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3 | u8g2_buffer.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 | |
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36 | #include "u8g2.h" |
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37 | #include <string.h> |
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38 | |
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39 | /*============================================*/ |
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40 | void u8g2_ClearBuffer(u8g2_t *u8g2) |
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41 | { |
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42 | size_t cnt; |
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43 | cnt = u8g2_GetU8x8(u8g2)->display_info->tile_width; |
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44 | cnt *= u8g2->tile_buf_height; |
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45 | cnt *= 8; |
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46 | memset(u8g2->tile_buf_ptr, 0, cnt); |
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47 | } |
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48 | |
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49 | /*============================================*/ |
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50 | |
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51 | static void u8g2_send_tile_row(u8g2_t *u8g2, uint8_t src_tile_row, uint8_t dest_tile_row) |
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52 | { |
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53 | uint8_t *ptr; |
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54 | uint16_t offset; |
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55 | uint8_t w; |
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56 | |
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57 | w = u8g2_GetU8x8(u8g2)->display_info->tile_width; |
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58 | offset = src_tile_row; |
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59 | ptr = u8g2->tile_buf_ptr; |
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60 | offset *= w; |
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61 | offset *= 8; |
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62 | ptr += offset; |
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63 | u8x8_DrawTile(u8g2_GetU8x8(u8g2), 0, dest_tile_row, w, ptr); |
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64 | } |
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65 | |
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66 | /* |
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67 | write the buffer to the display RAM. |
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68 | For most displays, this will make the content visible to the user. |
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69 | Some displays (like the SSD1606) require a u8x8_RefreshDisplay() |
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70 | */ |
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71 | static void u8g2_send_buffer(u8g2_t *u8g2) U8X8_NOINLINE; |
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72 | static void u8g2_send_buffer(u8g2_t *u8g2) |
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73 | { |
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74 | uint8_t src_row; |
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75 | uint8_t src_max; |
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76 | uint8_t dest_row; |
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77 | uint8_t dest_max; |
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78 | |
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79 | src_row = 0; |
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80 | src_max = u8g2->tile_buf_height; |
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81 | dest_row = u8g2->tile_curr_row; |
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82 | dest_max = u8g2_GetU8x8(u8g2)->display_info->tile_height; |
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83 | |
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84 | do |
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85 | { |
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86 | u8g2_send_tile_row(u8g2, src_row, dest_row); |
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87 | src_row++; |
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88 | dest_row++; |
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89 | } while( src_row < src_max && dest_row < dest_max ); |
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90 | } |
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91 | |
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92 | /* same as u8g2_send_buffer but also send the DISPLAY_REFRESH message (used by SSD1606) */ |
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93 | void u8g2_SendBuffer(u8g2_t *u8g2) |
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94 | { |
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95 | u8g2_send_buffer(u8g2); |
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96 | u8x8_RefreshDisplay( u8g2_GetU8x8(u8g2) ); |
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97 | } |
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98 | |
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99 | /*============================================*/ |
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100 | void u8g2_SetBufferCurrTileRow(u8g2_t *u8g2, uint8_t row) |
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101 | { |
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102 | u8g2->tile_curr_row = row; |
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103 | u8g2->cb->update_dimension(u8g2); |
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104 | u8g2->cb->update_page_win(u8g2); |
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105 | } |
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106 | |
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107 | void u8g2_FirstPage(u8g2_t *u8g2) |
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108 | { |
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109 | if ( u8g2->is_auto_page_clear ) |
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110 | { |
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111 | u8g2_ClearBuffer(u8g2); |
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112 | } |
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113 | u8g2_SetBufferCurrTileRow(u8g2, 0); |
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114 | } |
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115 | |
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116 | uint8_t u8g2_NextPage(u8g2_t *u8g2) |
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117 | { |
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118 | uint8_t row; |
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119 | u8g2_send_buffer(u8g2); |
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120 | row = u8g2->tile_curr_row; |
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121 | row += u8g2->tile_buf_height; |
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122 | if ( row >= u8g2_GetU8x8(u8g2)->display_info->tile_height ) |
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123 | { |
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124 | u8x8_RefreshDisplay( u8g2_GetU8x8(u8g2) ); |
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125 | return 0; |
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126 | } |
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127 | if ( u8g2->is_auto_page_clear ) |
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128 | { |
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129 | u8g2_ClearBuffer(u8g2); |
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130 | } |
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131 | u8g2_SetBufferCurrTileRow(u8g2, row); |
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132 | return 1; |
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133 | } |
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134 | |
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135 | |
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136 | |
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137 | /*============================================*/ |
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138 | /* |
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139 | Description: |
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140 | Update a sub area of the display, given by tile position, width and height. |
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141 | The arguments are "tile" coordinates. Any u8g2 rotation is ignored. |
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142 | This procedure only checks whether full buffer mode is active. |
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143 | There is no error checking for the arguments: It is the responsibility of the |
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144 | user to ensure, that the provided arguments are correct. |
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145 | |
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146 | Limitations: |
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147 | - Only available in full buffer mode (will not do anything in page mode) |
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148 | - Tile positions and sizes (pixel position divided by 8) |
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149 | - Any display rotation/mirror is ignored |
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150 | - Only works with displays, which support U8x8 API |
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151 | - Will not send the e-paper refresh message (will probably not work with e-paper devices) |
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152 | */ |
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153 | void u8g2_UpdateDisplayArea(u8g2_t *u8g2, uint8_t tx, uint8_t ty, uint8_t tw, uint8_t th) |
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154 | { |
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155 | uint16_t page_size; |
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156 | uint8_t *ptr; |
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157 | |
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158 | /* check, whether we are in full buffer mode */ |
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159 | if ( u8g2->tile_buf_height != u8g2_GetU8x8(u8g2)->display_info->tile_height ) |
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160 | return; /* not in full buffer mode, do nothing */ |
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161 | |
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162 | page_size = u8g2->pixel_buf_width; /* 8*u8g2->u8g2_GetU8x8(u8g2)->display_info->tile_width */ |
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163 | |
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164 | ptr = u8g2_GetBufferPtr(u8g2); |
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165 | ptr += tx*8; |
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166 | ptr += page_size*ty; |
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167 | |
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168 | while( th > 0 ) |
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169 | { |
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170 | u8x8_DrawTile( u8g2_GetU8x8(u8g2), tx, ty, tw, ptr ); |
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171 | ptr += page_size; |
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172 | ty++; |
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173 | th--; |
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174 | } |
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175 | } |
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176 | |
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177 | /* same as sendBuffer, but does not send the ePaper refresh message */ |
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178 | void u8g2_UpdateDisplay(u8g2_t *u8g2) |
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179 | { |
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180 | u8g2_send_buffer(u8g2); |
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181 | } |