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output: make gamma size a size_t and gamma table const

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This commit is contained in:
emersion 2018-10-03 10:36:33 +02:00
parent 1dd523c34c
commit 2beb68007e
7 changed files with 52 additions and 41 deletions
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40
backend/drm/drm.c
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@ -251,7 +251,7 @@ static bool drm_connector_swap_buffers(struct wlr_output *output,
return true;
}
static void fill_empty_gamma_table(uint32_t size,
static void fill_empty_gamma_table(size_t size,
uint16_t *r, uint16_t *g, uint16_t *b) {
for (uint32_t i = 0; i < size; ++i) {
uint16_t val = (uint32_t)0xffff * i / (size - 1);
@ -259,7 +259,7 @@ static void fill_empty_gamma_table(uint32_t size,
}
}
static uint32_t drm_connector_get_gamma_size(struct wlr_output *output) {
static size_t drm_connector_get_gamma_size(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
@ -270,8 +270,8 @@ static uint32_t drm_connector_get_gamma_size(struct wlr_output *output) {
return 0;
}
static bool drm_connector_set_gamma(struct wlr_output *output,
uint32_t size, uint16_t *r, uint16_t *g, uint16_t *b) {
static bool drm_connector_set_gamma(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
@ -279,25 +279,37 @@ static bool drm_connector_set_gamma(struct wlr_output *output,
return false;
}
uint16_t *reset_table = NULL;
bool reset = false;
if (size == 0) {
reset = true;
size = drm_connector_get_gamma_size(output);
reset_table = malloc(3 * size * sizeof(uint16_t));
if (reset_table == NULL) {
wlr_log(WLR_ERROR, "Failed to allocate gamma table");
if (size == 0) {
return false;
}
r = reset_table;
g = reset_table + size;
b = reset_table + 2 * size;
fill_empty_gamma_table(size, r, g, b);
}
bool ok = drm->iface->crtc_set_gamma(drm, conn->crtc, r, g, b, size);
uint16_t *gamma_table = malloc(3 * size * sizeof(uint16_t));
if (gamma_table == NULL) {
wlr_log(WLR_ERROR, "Failed to allocate gamma table");
return false;
}
uint16_t *_r = gamma_table;
uint16_t *_g = gamma_table + size;
uint16_t *_b = gamma_table + 2 * size;
if (reset) {
fill_empty_gamma_table(size, _r, _g, _b);
} else {
memcpy(_r, r, size * sizeof(uint16_t));
memcpy(_g, g, size * sizeof(uint16_t));
memcpy(_b, b, size * sizeof(uint16_t));
}
bool ok = drm->iface->crtc_set_gamma(drm, conn->crtc, size, _r, _g, _b);
if (ok) {
wlr_output_update_needs_swap(output);
}
free(reset_table);
free(gamma_table);
return ok;
}