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/* See LICENSE file for copyright and license details. */
#include "common.h"
/**
* Apply, update, or remove a gamma ramp adjustment, send request part
*
* Cannot be used before connecting to the server
*
* @param filter The filter to apply, update, or remove, gamma ramp meta-data must match the CRTC's
* @param ctx The state of the library, must be connected
* @param async Information about the request, that is needed to
* identify and parse the response, is stored here
* @return Zero on success, -1 on error
*/
int
libcoopgamma_set_gamma_send(const libcoopgamma_filter_t *restrict filter, libcoopgamma_context_t *restrict ctx,
libcoopgamma_async_context_t *restrict async)
{
const void *payload = NULL;
const char *lifespan;
char priority[sizeof("Priority: \n") + 3 * sizeof(int64_t)] = {'\0'};
char length [sizeof("Length: \n") + 3 * sizeof(size_t) ] = {'\0'};
size_t payload_size = 0, stopwidth = 0;
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnonnull-compare"
#endif
if (!filter || !filter->crtc || strchr(filter->crtc, '\n') || !filter->class || strchr(filter->class, '\n')) {
errno = EINVAL;
goto fail;
}
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic pop
#endif
switch (filter->lifespan) {
case LIBCOOPGAMMA_REMOVE: lifespan = "remove"; break;
case LIBCOOPGAMMA_UNTIL_DEATH: lifespan = "until-death"; break;
case LIBCOOPGAMMA_UNTIL_REMOVAL: lifespan = "until-removal"; break;
default:
errno = EINVAL;
goto fail;
}
if (filter->lifespan != LIBCOOPGAMMA_REMOVE) {
switch (filter->depth) {
case LIBCOOPGAMMA_FLOAT: stopwidth = sizeof(float); break;
case LIBCOOPGAMMA_DOUBLE: stopwidth = sizeof(double); break;
default: INTEGRAL_DEPTHS
if (filter->depth <= 0 || (filter->depth & 7)) {
errno = EINVAL;
goto fail;
}
stopwidth = (size_t)(filter->depth / 8);
break;
}
payload_size = filter->ramps.u8.red_size;
payload_size += filter->ramps.u8.green_size;
payload_size += filter->ramps.u8.blue_size;
payload_size *= stopwidth;
payload = filter->ramps.u8.red;
sprintf(priority, "Priority: %" PRIi64 "\n", filter->priority);
sprintf(length, "Length: %zu\n", payload_size);
}
async->message_id = ctx->message_id;
SEND_MESSAGE(ctx, payload, payload_size,
"Command: set-gamma\n"
"Message ID: %" PRIu32 "\n"
"CRTC: %s\n"
"Class: %s\n"
"Lifespan: %s\n"
"%s"
"%s"
"\n",
ctx->message_id, filter->crtc, filter->class, lifespan, priority, length);
return 0;
fail:
copy_errno(ctx);
return -1;
}
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