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Diffstat (limited to '')
| -rw-r--r-- | libgamma_AdjustmentMethod.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/libgamma_AdjustmentMethod.c b/libgamma_AdjustmentMethod.c new file mode 100644 index 0000000..b5f9fe1 --- /dev/null +++ b/libgamma_AdjustmentMethod.c @@ -0,0 +1,151 @@ +/* See LICENSE file for copyright and license details. */ +#include "libgamma_AdjustmentMethod.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, n); + + /* Remember, jint is 32 bits, int is 16+ bits. */ + for (i = 0; i < n; i++) + (*env)->SetIntArrayRegion(env, rc, 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non-existing (invalid) methods will be + * identified as not available under the rationale that the library may be out of date + * + * @param method The adjustment method + * @return Whether the adjustment method is available + */ +jint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 Input parameter to the constructor of {@link AdjustmentMethodCapabilities} + */ +jlong +Java_libgamma_AdjustmentMethod_libgamma_1method_1capabilities(JNIEnv *env, jclass class, jint method) +{ + libgamma_method_capabilities_t caps; + jlong rc; + + libgamma_method_capabilities(&caps, method); + 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; + return rc; + (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 */ + + 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; +} |