misc

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 59 insertions, 0 deletions

diff --git a/libgamma_w32_gdi_get_crtc_information.c b/libgamma_w32_gdi_get_crtc_information.c
new file mode 100644
index 0000000..c3c2819
--- /dev/null
+++ b/libgamma_w32_gdi_get_crtc_information.c
@@ -0,0 +1,59 @@
+/* See LICENSE file for copyright and license details. */
+#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
+}