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Add to draw line horz and vert line

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Marián 2022-11-25 13:57:31 +01:00 committed by GitHub
parent b7d0f13c92
commit a21fa9375b
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1 changed files with 19 additions and 0 deletions
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lib/ssd1306.c
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@ -577,6 +577,25 @@ uint8_t SSD1306_DrawLine (uint8_t x1, uint8_t x2, uint8_t y1, uint8_t y2)
delta_x = x2 - x1; // delta x
delta_y = y2 - y1; // delta y
// Vertical line
// -------------------------------------------------------------------------------------
if (delta_x == 0) {
status = SSD1306_DrawLineVert (x1, y1, y2); // draw vertical line
if (SSD1306_SUCCESS != status) { // check status
return status; // error
}
return SSD1306_SUCCESS; // success return
}
// Horizontal line
// -------------------------------------------------------------------------------------
if (delta_y == 0) {
status = SSD1306_DrawLineHorz (y1, x1, x2); // draw horizontal line
if (SSD1306_SUCCESS != status) { // check status
return status; // error
}
return SSD1306_SUCCESS; // success return
}
if (delta_x < 0) { // check if x2 > x1
delta_x = -delta_x; // negate delta x
trace_x = -trace_x; // negate step x