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/**
* Calculate virtual->real co-ordinate mapping to underlying single chain of panels connected to ESP32.
* Updates the private class member variable 'coords', so no need to use the return value.
* Not thread safe, but not a concern for ESP32 sketch anyway... I think.
*/
// DO NOT CHANGE
inline VirtualCoords VirtualMatrixPanelTest::getCoords_WorkingBaslineMarch2023(int16_t virt_x, int16_t virt_y)
{
coords.x = coords.y = -1; // By defalt use an invalid co-ordinates that will be rejected by updateMatrixDMABuffer
if (virt_x < 0 || virt_x >= virtualResX || virt_y < 0 || virt_y >= virtualResY)
{ // Co-ordinates go from 0 to X-1 remember! otherwise they are out of range!
return coords;
}
// Do we want to rotate?
if (_rotate)
{
int16_t temp_x = virt_x;
virt_x = virt_y;
virt_y = virtualResY - 1 - temp_x;
}
int row = (virt_y / panelResY); // 0 indexed
switch(panel_chain_type)
{
case (CHAIN_TOP_RIGHT_DOWN):
{
if ( (row % 2) == 1 )
{ // upside down panel
//Serial.printf("Condition 1, row %d ", row);
// refersed for the row
coords.x = dmaResX - virt_x - (row*virtualResX);
// y co-ord inverted within the panel
coords.y = panelResY - 1 - (virt_y % panelResY);
}
else
{
//Serial.printf("Condition 2, row %d ", row);
coords.x = ((vmodule_rows - (row+1))*virtualResX)+virt_x;
coords.y = virt_y % panelResY;
}
}
break;
case (CHAIN_TOP_LEFT_DOWN): // OK -> modulus opposite of CHAIN_TOP_RIGHT_DOWN
{
if ( (row % 2) == 0 )
{ // refersed panel
//Serial.printf("Condition 1, row %d ", row);
coords.x = dmaResX - virt_x - (row*virtualResX);
// y co-ord inverted within the panel
coords.y = panelResY - 1 - (virt_y % panelResY);
}
else
{
//Serial.printf("Condition 2, row %d ", row);
coords.x = ((vmodule_rows - (row+1))*virtualResX)+virt_x;
coords.y = virt_y % panelResY;
}
}
break;
case (CHAIN_BOTTOM_LEFT_UP): //
{
row = vmodule_rows - row - 1;
if ( (row % 2) == 1 )
{
// Serial.printf("Condition 1, row %d ", row);
coords.x = ((vmodule_rows - (row+1))*virtualResX)+virt_x;
coords.y = virt_y % panelResY;
}
else
{ // inverted panel
// Serial.printf("Condition 2, row %d ", row);
coords.x = dmaResX - (row*virtualResX) - virt_x;
coords.y = panelResY - 1 - (virt_y % panelResY);
}
}
break;
case (CHAIN_BOTTOM_RIGHT_UP): // OK -> modulus opposite of CHAIN_BOTTOM_LEFT_UP
{
row = vmodule_rows - row - 1;
if ( (row % 2) == 0 )
{ // right side up
// Serial.printf("Condition 1, row %d ", row);
// refersed for the row
coords.x = ((vmodule_rows - (row+1))*virtualResX)+virt_x;
coords.y = virt_y % panelResY;
}
else
{ // inverted panel
// Serial.printf("Condition 2, row %d ", row);
coords.x = dmaResX - (row*virtualResX) - virt_x;
coords.y = panelResY - 1 - (virt_y % panelResY);
}
}
break;
default:
return coords;
break;
} // end switch
/* START: Pixel remapping AGAIN to convert TWO parallel scanline output that the
* the underlying hardware library is designed for (because
* there's only 2 x RGB pins... and convert this to 1/4 or something
*/
if (panel_scan_rate == FOUR_SCAN_32PX_HIGH)
{
/* Convert Real World 'VirtualMatrixPanel' co-ordinates (i.e. Real World pixel you're looking at
on the panel or chain of panels, per the chaining configuration) to a 1/8 panels
double 'stretched' and 'squished' coordinates which is what needs to be sent from the
DMA buffer.
Note: Look at the FourScanPanel example code and you'll see that the DMA buffer is setup
as if the panel is 2 * W and 0.5 * H !
*/
if ((virt_y & 8) == 0)
{
coords.x += ((coords.x / panelResX) + 1) * panelResX; // 1st, 3rd 'block' of 8 rows of pixels, offset by panel width in DMA buffer
}
else
{
coords.x += (coords.x / panelResX) * panelResX; // 2nd, 4th 'block' of 8 rows of pixels, offset by panel width in DMA buffer
}
// http://cpp.sh/4ak5u
// Real number of DMA y rows is half reality
// coords.y = (y / 16)*8 + (y & 0b00000111);
coords.y = (virt_y >> 4) * 8 + (virt_y & 0b00000111);
}
else if (panel_scan_rate == FOUR_SCAN_16PX_HIGH)
{
if ((virt_y & 8) == 0)
{
coords.x += (panelResX >> 2) * (((coords.x & 0xFFF0) >> 4) + 1); // 1st, 3rd 'block' of 8 rows of pixels, offset by panel width in DMA buffer
}
else
{
coords.x += (panelResX >> 2) * (((coords.x & 0xFFF0) >> 4)); // 2nd, 4th 'block' of 8 rows of pixels, offset by panel width in DMA buffer
}
if (virt_y < 32)
coords.y = (virt_y >> 4) * 8 + (virt_y & 0b00000111);
else
{
coords.y = ((virt_y - 32) >> 4) * 8 + (virt_y & 0b00000111);
coords.x += 256;
}
}
return coords;
}
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