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st7789: fix index out of bounds error

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This commit adds the same check to the st7789 that also exists in the
st7735.
This commit is contained in:
Ayke van Laethem
2019-10-28 12:23:56 +01:00
parent 2413eb86e0
commit 2c2f1d3db4
1 changed files with 7 additions and 6 deletions
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st7789/st7789.go
+7 -6
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@@ -194,12 +194,13 @@ func (d *Device) FillRectangleWithBuffer(x, y, width, height int16, buffer []col
offset := int32(0)
for k > 0 {
for i := int32(0); i < d.batchLength; i++ {
c565 := RGBATo565(buffer[offset+i])
c1 := uint8(c565 >> 8)
c2 := uint8(c565)
data[i*2] = c1
data[i*2+1] = c2
if offset+i < int32(len(buffer)) {
c565 := RGBATo565(buffer[offset+i])
c1 := uint8(c565 >> 8)
c2 := uint8(c565)
data[i*2] = c1
data[i*2+1] = c2
}
}
if k >= d.batchLength {
d.Tx(data, false)