/* See LICENSE file for copyright and license details. */
#include "libgamma_AdjustmentMethod.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <libgamma.h>
#if LIBGAMMA_METHOD_COUNT > 6
# error LIBGAMMA_METHOD_COUNT has been updated
#endif
/**
* List available adjustment methods by their order of preference based on the environment
*
* @param operation Allowed values:
* 0: Methods that the environment suggests will work, excluding fake
* 1: Methods that the environment suggests will work, including fake
* 2: All real non-fake methods
* 3: All real methods
* 4: All methods
* Other values invoke undefined behaviour
* @return List available adjustment methods by their order of preference
*/
jintArray
Java_libgamma_AdjustmentMethod_libgamma_1list_1methods(JNIEnv *env, jclass class, jint operation)
{
int methods[LIBGAMMA_METHOD_COUNT];
size_t i, n;
jintArray rc;
n = libgamma_list_methods(methods, LIBGAMMA_METHOD_COUNT, operation);
if (n > LIBGAMMA_METHOD_COUNT)
abort(); /* Prevented by the #if above and package maintenance */
rc = (*env)->NewIntArray(env, (jsize)n);
/* Remember, jint is 32 bits, int is 16+ bits. */
for (i = 0; i < n; i++)
(*env)->SetIntArrayRegion(env, rc, (jsize)i, 1, methods + i);
return rc;
(void) class;
}
/**
* Check whether an adjustment method is available, non-existing (invalid) methods will be
* identified as not available under the rationale that the library may be out of date
*
* @param method The adjustment method
* @return Whether the adjustment method is available
*/
jint
Java_libgamma_AdjustmentMethod_libgamma_1is_1method_1available(JNIEnv *env, jclass class, jint method)
{
return libgamma_is_method_available(method);
(void) env;
(void) class;
}
/**
* Return the capabilities of an adjustment method
*
* @param method The adjustment method (display server and protocol)
* @return Element 0: Input parameter to the constructor of {@link AdjustmentMethodCapabilities}
* Element 1: Error code, zero on success
*/
jlongArray
Java_libgamma_AdjustmentMethod_libgamma_1method_1capabilities(JNIEnv *env, jclass class, jint method)
{
jlongArray rv = (*env)->NewLongArray(env, 2);
struct libgamma_method_capabilities caps;
jlong rc = 0, e = 0;
int r = libgamma_method_capabilities(&caps, sizeof(caps), method);
if (r) {
e = (jlong)(r == LIBGAMMA_ERRNO_SET ? errno : r);
goto out;
}
rc = (jlong)(caps.crtc_information);
rc &= 0xFFFFFFFFLL;
rc |= caps.default_site_known ? (1LL << 33) : 0;
rc |= caps.multiple_sites ? (1LL << 34) : 0;
rc |= caps.multiple_partitions ? (1LL << 35) : 0;
rc |= caps.multiple_crtcs ? (1LL << 36) : 0;
rc |= caps.partitions_are_graphics_cards ? (1LL << 37) : 0;
rc |= caps.site_restore ? (1LL << 38) : 0;
rc |= caps.partition_restore ? (1LL << 39) : 0;
rc |= caps.crtc_restore ? (1LL << 40) : 0;
rc |= caps.identical_gamma_sizes ? (1LL << 41) : 0;
rc |= caps.fixed_gamma_size ? (1LL << 42) : 0;
rc |= caps.fixed_gamma_depth ? (1LL << 43) : 0;
rc |= caps.real ? (1LL << 44) : 0;
rc |= caps.fake ? (1LL << 45) : 0;
out:
(*env)->SetLongArrayRegion(env, rv, 0, 1, &rc);
(*env)->SetLongArrayRegion(env, rv, 1, 1, &e);
return rv;
(void) env;
(void) class;
}
/**
* Return the default site for an adjustment method
*
* @param method The adjustment method (display server and protocol)
* @return The default site, {@code null} if it cannot be determined or
* if multiple sites are not supported by the adjustment method
*/
jstring
Java_libgamma_AdjustmentMethod_libgamma_1method_1default_1site(JNIEnv *env, jclass class, jint method)
{
/* It is really unlikely that `malloc` returns `NULL` here
* and error handing makes this unnecessarily comples,
* therefore we will simply skip it */
const char *do_not_free_this = libgamma_method_default_site(method);
char *this_will_be_freed;
size_t n;
if (!do_not_free_this)
return NULL;
n = strlen(do_not_free_this) + 1;
this_will_be_freed = malloc(n * sizeof(char));
memcpy(this_will_be_freed, do_not_free_this, n * sizeof(char));
return (*env)->NewStringUTF(env, this_will_be_freed);
(void) class;
}
/**
* Return the default variable that determines
* the default site for an adjustment method
*
* @param method The adjustment method (display server and protocol)
* @return The environ variables that is used to determine the
* default site; {@code null} if there is none, that is,
* if the method does not support multiple sites
*/
jstring
Java_libgamma_AdjustmentMethod_libgamma_1method_1default_1site_1variable(JNIEnv *env, jclass class, jint method)
{
/* It is really unlikely that `malloc` returns `NULL` here
* and error handing makes this unnecessarily comples,
* therefore we will simply skip it */
const char *do_not_free_this = libgamma_method_default_site_variable(method);
char *this_will_be_freed;
size_t n;
if (!do_not_free_this)
return NULL;
n = strlen(do_not_free_this) + 1;
this_will_be_freed = malloc(n * sizeof(char));
memcpy(this_will_be_freed, do_not_free_this, n * sizeof(char));
return (*env)->NewStringUTF(env, this_will_be_freed);
(void) class;
}
