diff options
Diffstat (limited to 'libgamma_w32_gdi_partition_initialise.c')
-rw-r--r-- | libgamma_w32_gdi_partition_initialise.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/libgamma_w32_gdi_partition_initialise.c b/libgamma_w32_gdi_partition_initialise.c new file mode 100644 index 0000000..81ab398 --- /dev/null +++ b/libgamma_w32_gdi_partition_initialise.c @@ -0,0 +1,35 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + + +/** + * Initialise an allocated partition state + * + * @param this The partition state to initialise + * @param site The site state for the site that the partition belongs to + * @param partition The the index of the partition within the site + * @return Zero on success, otherwise (negative) the value of an + * error identifier provided by this library + */ +int +libgamma_w32_gdi_partition_initialise(libgamma_partition_state_t *restrict this, + libgamma_site_state_t *restrict site, size_t partition) +{ + DWORD n = 0; + DISPLAY_DEVICE display; + + (void) site; + + if (partition) + return LIBGAMMA_NO_SUCH_PARTITION; + + /* Count CRTC:s by iteration over all possible identifiers + until we reach on that does not exist */ + display.cb = sizeof(DISPLAY_DEVICE); + while (EnumDisplayDevices(NULL, n, &display, 0)) + if (n++ == UINT32_MAX) + return LIBGAMMA_IMPOSSIBLE_AMOUNT; + this->crtcs_available = (size_t)n; + return 0; +} |