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nowa wersja write_to_buffer

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bartool
2021-05-30 12:21:27 +02:00
parent 5126a1a782
commit 02dca8c008
3 changed files with 93 additions and 46 deletions
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115
Core/Src/SSD1306_oled.c
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@@ -236,38 +236,83 @@ void ssd1306_clear_buffer (uint8_t width, uint8_t height, uint8_t pos_x, uint8_t
}
//
//void next(void)
//{
// uint16_t tmp;
// for(uint8_t col = col_start; col < col_end; col++, bitmap_col++)
// {
// tmp = buffer_oled[page_start * SSD1306_LCDWIDTH + col] & (0xFF >> (8 - pos_y%8));
//
// for( uint8_t page = page_start; page < page_end; page++, bitmap_row++ )
// {
// bitmap_idx = bitmap_width * bitmap_row + bitmap_col;
//
// if (bitmap_idx < bitmap_max_idx)
// {
//// mask_buf = 0xFF;
//
// pixels_left = bitmap_height - bitmap_row * 8; //poprawic
// if (pixels_left < 8)
// {
// mask_buf = 0xFF >> pixels_left;
// }
//
// tmp &= ~(mask_buf); // mask_buf zeruje tylko to co zostanie nadpisane
// tmp |= bitmap[bitmap_idx] << pos_y%8; // mask_data maskuje tylko starsza czesc bajtu
// }
//
// buffer_oled[page * SSD1306_LCDWIDTH + col] = (uint8_t) tmp;
// tmp = tmp >> 8;
// }
// }
//
//
//}
//
//
void next(const uint8_t* bitmap, uint8_t bitmap_width, uint8_t bitmap_height, int8_t pos_x, int8_t pos_y)
{
if (bitmap_width + pos_x < 0 || bitmap_height + pos_y < 0) return;
uint16_t tmp, bitmap_idx, bitmap_max_idx;
uint8_t buf_row_first, buf_row_last, buf_col_first, buf_col_last, bitmap_col, bitmap_row, bitmap_row_first;
uint8_t mask_buf;
if (pos_x < 0)
{
bitmap_col = pos_x * -1;
buf_col_first = 0;
}
else
{
bitmap_col = 0;
buf_col_first = pos_x;
}
if (pos_y < 0)
{
bitmap_row_first = (pos_y * -1) / 8;
buf_row_first = 0;
}
else
{
bitmap_row_first = 0;
buf_row_first = pos_y / 8;
}
bitmap_max_idx = bitmap_width * ((bitmap_height + 7) / 8);
buf_col_last = (bitmap_width + pos_x) > SSD1306_LCDWIDTH ? SSD1306_LCDWIDTH : (bitmap_width + pos_x);
// buf_row_last = (bitmap_height + pos_y) > SSD1306_LCDHEIGHT ? SSD1306_LCDHEIGHT / 8: (bitmap_height + pos_y + 7) / 8;
if (bitmap_height + pos_y > SSD1306_LCDHEIGHT)
{
buf_row_last = SSD1306_LCDHEIGHT / 8;
}
else
{
buf_row_last = (bitmap_height + pos_y + 7) / 8;
}
for(uint8_t col = buf_col_first; col < buf_col_last; col++, bitmap_col++)
{
tmp = 0;
bitmap_row = bitmap_row_first;
for( uint8_t buf_row = buf_row_first; buf_row < buf_row_last; buf_row++, bitmap_row++ )
{
bitmap_idx = bitmap_width * bitmap_row + bitmap_col;
mask_buf = 0;
if (bitmap_row == 0)
{
mask_buf |= 0xFF >> (8 - pos_y%8);
}
uint8_t shifted_pixels_left = (pos_y + bitmap_height) - bitmap_row * 8;
if (shifted_pixels_left < 8)
{
mask_buf |= (0xFF << shifted_pixels_left);
}
tmp |= buffer_oled[buf_row * SSD1306_LCDWIDTH + col] & mask_buf;
if (bitmap_idx < bitmap_max_idx)
{
tmp |= bitmap[bitmap_idx] << pos_y%8;
}
buffer_oled[buf_row * SSD1306_LCDWIDTH + col] = (uint8_t) tmp;
tmp = tmp >> 8;
}
}
}