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output: fix wlr_output_set_gamma() with zero size

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This is documented to reset the gamma LUT, but we don't handle this
properly.

While at it, make sure we leave wlr_output.pending in a good state
on allocation failure.
This commit is contained in:
Simon Ser 2022-09-18 15:20:39 +02:00
parent ebd4c83cd6
commit 2ad25b1460
1 changed files with 13 additions and 9 deletions
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20
types/output/output.c
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@ -925,18 +925,22 @@ void wlr_output_send_present(struct wlr_output *output,
void wlr_output_set_gamma(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b) {
output_state_clear_gamma_lut(&output->pending);
output->pending.gamma_lut_size = size;
output->pending.gamma_lut = malloc(3 * size * sizeof(uint16_t));
if (output->pending.gamma_lut == NULL) {
uint16_t *gamma_lut = NULL;
if (size > 0) {
gamma_lut = malloc(3 * size * sizeof(uint16_t));
if (gamma_lut == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return;
}
memcpy(output->pending.gamma_lut, r, size * sizeof(uint16_t));
memcpy(output->pending.gamma_lut + size, g, size * sizeof(uint16_t));
memcpy(output->pending.gamma_lut + 2 * size, b, size * sizeof(uint16_t));
memcpy(gamma_lut, r, size * sizeof(uint16_t));
memcpy(gamma_lut + size, g, size * sizeof(uint16_t));
memcpy(gamma_lut + 2 * size, b, size * sizeof(uint16_t));
}
output_state_clear_gamma_lut(&output->pending);
output->pending.gamma_lut_size = size;
output->pending.gamma_lut = gamma_lut;
output->pending.committed |= WLR_OUTPUT_STATE_GAMMA_LUT;
}