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-rw-r--r--src/gamma-x-randr.c81
1 files changed, 80 insertions, 1 deletions
diff --git a/src/gamma-x-randr.c b/src/gamma-x-randr.c
index 36be77a..87b0475 100644
--- a/src/gamma-x-randr.c
+++ b/src/gamma-x-randr.c
@@ -332,6 +332,34 @@ int libgamma_x_randr_crtc_restore(libgamma_crtc_state_t* restrict this)
/**
+ * Get the gamma ramp size of 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
+ * @return Non-zero on error
+ */
+static int get_gamma_ramp_size(libgamma_crtc_information_t* restrict out, libgamma_crtc_state_t* restrict crtc)
+{
+ xcb_connection_t* restrict connection = crtc->partition->site->data;
+ xcb_randr_crtc_t* restrict crtc_id = crtc->data;
+ xcb_randr_get_crtc_gamma_size_cookie_t cookie;
+ xcb_randr_get_crtc_gamma_size_reply_t* reply;
+ xcb_generic_error_t* error;
+
+ out->gamma_size_error = 0;
+ cookie = xcb_randr_get_crtc_gamma_size(connection, *crtc_id);
+ reply = xcb_randr_get_crtc_gamma_size_reply(connection, cookie, &error);
+ if (error != NULL)
+ return out->gamma_size_error = translate_error(error->error_code, LIBGAMMA_GAMMA_RAMPS_SIZE_QUERY_FAILED);
+ if (reply->size < 2)
+ out->gamma_size_error = LIBGAMMA_SINGLETON_GAMMA_RAMP;
+ out->red_gamma_size = out->green_gamma_size = out->blue_gamma_size = reply->size;
+ free(reply);
+ return out->gamma_size_error;
+}
+
+
+/**
* Read information about a CRTC
*
* @param this Instance of a data structure to fill with the information about the CRTC
@@ -342,7 +370,58 @@ int libgamma_x_randr_crtc_restore(libgamma_crtc_state_t* restrict this)
int libgamma_x_randr_get_crtc_information(libgamma_crtc_information_t* restrict this,
libgamma_crtc_state_t* restrict crtc, int32_t fields)
{
- /* TODO */
+#define _E(FIELD) ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 0)
+ int e = 0;
+ int free_edid;
+
+
+ /* Wipe all error indicators. */
+ memset(this, 0, sizeof(libgamma_crtc_information_t));
+
+ /* We need to free the EDID after us if it is not explicitly requested. */
+ free_edid = (fields & CRTC_INFO_EDID) == 0;
+
+ /* Figure out what fields we need to get the data for to get the data for other fields. */
+ if ((fields & (CRTC_INFO_WIDTH_MM_EDID | CRTC_INFO_HEIGHT_MM_EDID | CRTC_INFO_GAMMA)))
+ fields |= CRTC_INFO_EDID;
+
+ /* FIXME */
+ e |= this->width_mm_error = -1;
+ e |= this->height_mm_error = -1;
+ e |= this->connector_type = -1;
+ e |= this->subpixel_order_error = -1;
+ e |= this->active_error = -1;
+ e |= this->connector_name_error = -1;
+ e |= this->edid_error = -1;
+ e |= this->gamma_error = -1;
+ e |= this->width_mm_edid_error = -1;
+ e |= this->height_mm_edid_error = -1;
+
+ if ((fields & CRTC_INFO_EDID) == 0)
+ goto cont;
+ e |= get_edid(crtc, this);
+ if (this->edid == NULL)
+ {
+ this->gamma_error = this->width_mm_edid_error = this->height_mm_edid_error = this->edid_error;
+ goto cont;
+ }
+ if ((fields & (CRTC_INFO_WIDTH_MM_EDID | CRTC_INFO_HEIGHT_MM_EDID | CRTC_INFO_GAMMA)))
+ e |= libgamma_parse_edid(this, fields);
+
+ cont:
+ e |= (fields & CRTC_INFO_GAMMA_SIZE) ? get_gamma_ramp_size(this, crtc) : 0;
+ this->gamma_depth = 16;
+ e |= this->gamma_support_error = _E(CRTC_INFO_GAMMA_SUPPORT);
+
+ /* Free the EDID after us. */
+ if (free_edid)
+ {
+ free(this->edid);
+ this->edid = NULL;
+ }
+
+ return e ? -1 : 0;
+#undef _E
}