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Code Issues Wiki Activity

prevent max7456 screen_buffer from overflow (#8063)

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prevent max7456 screen_buffer from overflow
This commit is contained in:
Michael Keller 2019-04-28 12:36:31 +12:00 • committed by mikeller
parent b57fd7b53d
commit a7968c754d
1 changed files with 6 additions and 4 deletions
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8
src/main/drivers/max7456.c
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@ -571,14 +571,16 @@ uint8_t* max7456GetScreenBuffer(void)
void max7456WriteChar(uint8_t x, uint8_t y, uint8_t c)
{
if (x < CHARS_PER_LINE && y < VIDEO_LINES_PAL) {
screenBuffer[y * CHARS_PER_LINE + x] = c;
}
}
void max7456Write(uint8_t x, uint8_t y, const char *buff)
{
for (int i = 0; *(buff+i); i++) {
if (x+i < CHARS_PER_LINE) {// Do not write over screen
screenBuffer[y*CHARS_PER_LINE+x+i] = *(buff+i);
if (y < VIDEO_LINES_PAL) {
for (int i = 0; buff[i] && x + i < CHARS_PER_LINE; i++) {
screenBuffer[y * CHARS_PER_LINE + x + i] = buff[i];
}
}
}