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Custom page selection for paged display #990

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Custom page selection for paged display #990

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1cbbf6e
Add method for selecting another than the first page as to be able to…
JohannesWilde Sep 8, 2019
1bce3f3
I don't know what happens if one sets the current tile buffer not ali…
JohannesWilde Sep 8, 2019
a0ed1d9
Add some comments.
JohannesWilde Sep 8, 2019
0edd2b1
Pass customPage out to the c++ class.
JohannesWilde Sep 8, 2019
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Add method for selecting another than the first page as to be able to… 
… update only a vertical section of the display without affecting the rest.
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@JohannesWilde
JohannesWilde committed Sep 8, 2019
commit 1cbbf6e20b5c8f78d936645dd6ffd80cbee53aab
1 change: 1 addition & 0 deletions csrc/u8g2.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1144,6 +1144,7 @@ void u8g2_ClearBuffer(u8g2_t *u8g2);

void u8g2_SetBufferCurrTileRow(u8g2_t *u8g2, uint8_t row) U8G2_NOINLINE;

uint8_t u8g2_CustomPage(u8g2_t * const u8g2, uint8_t const page);
void u8g2_FirstPage(u8g2_t *u8g2);
uint8_t u8g2_NextPage(u8g2_t *u8g2);

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23 changes: 23 additions & 0 deletions csrc/u8g2_buffer.c
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Expand Up @@ -104,6 +104,29 @@ void u8g2_SetBufferCurrTileRow(u8g2_t *u8g2, uint8_t row)
u8g2->cb->update_page_win(u8g2);
}

uint8_t u8g2_PageFirstRow(u8g2_t const * const u8g2, uint8_t const page)
{
return u8g2->tile_buf_height * page;
}

uint8_t u8g2_CustomPage(u8g2_t * const u8g2, uint8_t const page)
{
uint8_t const row = u8g2_PageFirstRow(u8g2, page);
if ( row >= u8g2_GetU8x8(u8g2)->display_info->tile_height )
{
return 0;
}
else
{
if ( u8g2->is_auto_page_clear )
{
u8g2_ClearBuffer(u8g2);
}
u8g2_SetBufferCurrTileRow(u8g2, row);
return 1;
}
}

void u8g2_FirstPage(u8g2_t *u8g2)
{
if ( u8g2->is_auto_page_clear )
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