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/* See LICENSE file for copyright and license details. */
#define IN_LIBGAMMA_W32_GDI
#include "common.h"
/**
* Read information about a CRTC
*
* @param this Instance of a data structure to fill with the information about the CRTC
* @param crtc The state of the CRTC whose information should be read
* @param fields OR:ed identifiers for the information about the CRTC that should be read
* @return Zero on success, -1 on error. On error refer to the error reports in `this`
*/
int
libgamma_w32_gdi_get_crtc_information(libgamma_crtc_information_t *restrict this,
libgamma_crtc_state_t *restrict crtc, int32_t fields)
{
#define KNOWN_FIELDS (LIBGAMMA_CRTC_INFO_GAMMA_SIZE | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH)
#define _E(FIELD) ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 0)
(void) crtc;
/* Windows GDI does not support EDID or monitor dimensions */
this->edid_error = _E(LIBGAMMA_CRTC_INFO_EDID);
this->width_mm_error = _E(LIBGAMMA_CRTC_INFO_WIDTH_MM);
this->height_mm_error = _E(LIBGAMMA_CRTC_INFO_HEIGHT_MM);
this->width_mm_edid_error = _E(LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID);
this->height_mm_edid_error = _E(LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID);
/* Windows GDI have fixed gamma ramp sizes */
this->red_gamma_size = W32_GDI_GAMMA_RAMP_SIZE;
this->green_gamma_size = W32_GDI_GAMMA_RAMP_SIZE;
this->blue_gamma_size = W32_GDI_GAMMA_RAMP_SIZE;
this->gamma_size_error = 0;
/* Windows GDI have fixed gamma ramp depth */
this->gamma_depth = 16;
this->gamma_depth_error = 0;
/* It is possible to query Windows GDI whether the device
have gamma ramp support. It cannot fail. However, I think
the result is incorrect if multiple monitors are active,
so we cannot include this. */
/*
if ((fields & LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT))
this->gamma_support = GetDeviceCaps(crtc->data, COLORMGMTCAPS) == CM_GAMMA_RAMP;
this->gamma_support_error = 0;
*/
this->gamma_support_error = _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT);
/* Windows GDI does not support EDID or connector information */
this->subpixel_order_error = _E(LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER);
this->active_error = _E(LIBGAMMA_CRTC_INFO_ACTIVE);
this->connector_name_error = _E(LIBGAMMA_CRTC_INFO_CONNECTOR_NAME);
this->connector_type_error = _E(LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE);
this->gamma_error = _E(LIBGAMMA_CRTC_INFO_GAMMA);
/* There was a failure if and only if unsupport field was requested. */
return (fields & ~KNOWN_FIELDS) ? -1 : 0;
#undef _E
#undef KNOWN_FIELDS
}
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