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Correct Sprite odd pixel count width crash

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The 32 bit alignment offset must be checked for every line to prevent crash with odd pixel count lines.
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Bodmer
2017-12-01 15:37:08 +00:00
committed by GitHub
parent 6b924c5504
commit 9d2c7f21fc
1 changed files with 4 additions and 3 deletions
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7
TFT_eSPI.cpp
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@@ -562,13 +562,14 @@ uint16_t TFT_eSPI::readPixel(int32_t x0, int32_t y0)
data += dx + dy * w;
// Check alignment of pointer to 32 bits
uint8_t offset = (uint32_t)data & 0x3;
dw <<= 1;
if (offset > dw) offset = dw;
while (dh--)
{
// Check alignment of pointer to 32 bits
uint8_t offset = (uint32_t)data & 0x3;
if (offset > dw) offset = dw;
int32_t len = dw;
uint8_t* ptr = (uint8_t*)data;