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/**
* libgamma -- Display server abstraction layer for gamma ramp adjustments
* Copyright (C) 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "crtcinfo.h"
/**
* Conditionally print a CRTC information field.
*
* @param type:data-type Data type for the value of the information field.
* @param notation:string-literal %-pattern for `printf` (excluding the %) that is used for `type`.
* @param do_print Whether the information should be included in the process's output.
* @param description A description of the information field.
* @param error The error of the information field.
* @param value The value of the information field.
*/
#define print_crtc_information_(type, notation) \
static void print_crtc_information_##type(int do_print, const char* description, int error, type value) \
{ \
char buf[256]; \
if (do_print) \
{ \
if (error) \
{ \
snprintf(buf, sizeof(buf) / sizeof(char), " (error) %s", description); \
libgamma_perror(buf, error); \
} \
else \
printf(" %s: %" notation "\n", description, value); \
} \
}
/**
* A single [a-z] word alternative to `const char*`, we need it for the
* function name of the string variant of `print_crtc_information_*`.
*/
typedef const char* str;
/* Create `print_crtc_information_*` variants. */
print_crtc_information_(size_t, "lu")
print_crtc_information_(signed, "i")
print_crtc_information_(int, "i")
#ifdef __GCC__
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wdouble-promotion"
#endif
print_crtc_information_(float, "f")
#ifdef __GCC__
# pragma GCC diagnostic pop
#endif
print_crtc_information_(str, "s")
#undef print_crtc_information_
#define __case(VALUE) case VALUE: return #VALUE;
/**
* Get a string representation of a subpixel order.
*
* @param value The subpixel order.
* @return String representation.
*/
static const char* subpixel_order_str(libgamma_subpixel_order_t value)
{
switch (value)
{
__case (LIBGAMMA_SUBPIXEL_ORDER_UNKNOWN)
__case (LIBGAMMA_SUBPIXEL_ORDER_NONE)
__case (LIBGAMMA_SUBPIXEL_ORDER_HORIZONTAL_RGB)
__case (LIBGAMMA_SUBPIXEL_ORDER_HORIZONTAL_BGR)
__case (LIBGAMMA_SUBPIXEL_ORDER_VERTICAL_RGB)
__case (LIBGAMMA_SUBPIXEL_ORDER_VERTICAL_BGR)
default:
return "(unknown)";
}
}
/**
* Get a string representation of a connector type.
*
* @param value The connector type.
* @return String representation.
*/
static const char* connector_type_str(libgamma_connector_type_t value)
{
switch (value)
{
__case (LIBGAMMA_CONNECTOR_TYPE_Unknown)
__case (LIBGAMMA_CONNECTOR_TYPE_VGA)
__case (LIBGAMMA_CONNECTOR_TYPE_DVI)
__case (LIBGAMMA_CONNECTOR_TYPE_DVII)
__case (LIBGAMMA_CONNECTOR_TYPE_DVID)
__case (LIBGAMMA_CONNECTOR_TYPE_DVIA)
__case (LIBGAMMA_CONNECTOR_TYPE_Composite)
__case (LIBGAMMA_CONNECTOR_TYPE_SVIDEO)
__case (LIBGAMMA_CONNECTOR_TYPE_LVDS)
__case (LIBGAMMA_CONNECTOR_TYPE_Component)
__case (LIBGAMMA_CONNECTOR_TYPE_9PinDIN)
__case (LIBGAMMA_CONNECTOR_TYPE_DisplayPort)
__case (LIBGAMMA_CONNECTOR_TYPE_HDMI)
__case (LIBGAMMA_CONNECTOR_TYPE_HDMIA)
__case (LIBGAMMA_CONNECTOR_TYPE_HDMIB)
__case (LIBGAMMA_CONNECTOR_TYPE_TV)
__case (LIBGAMMA_CONNECTOR_TYPE_eDP)
__case (LIBGAMMA_CONNECTOR_TYPE_VIRTUAL)
__case (LIBGAMMA_CONNECTOR_TYPE_DSI)
__case (LIBGAMMA_CONNECTOR_TYPE_LFP)
default:
return "(unknown)";
}
}
#undef __case
/**
* The CRTC information for a CRTC.
*
* @param crtc The CRTC.
*/
void crtc_information(libgamma_crtc_state_t* restrict crtc)
{
libgamma_method_capabilities_t caps;
libgamma_crtc_information_t info;
int fields;
int field;
/* Get supported CRTC informations fields. */
libgamma_method_capabilities(&caps, crtc->partition->site->method);
/* List unsupport information fields by testing them one by one. */
for (fields = caps.crtc_information; field = fields & -fields, fields; fields ^= field)
{
if (libgamma_get_crtc_information(&info, crtc, field))
printf("Could not read CRTC information field %i\n", field);
free(info.edid);
free(info.connector_name);
}
/* Get CRTC information, that is supported. */
fields = caps.crtc_information;
if (libgamma_get_crtc_information(&info, crtc, fields))
printf("An error occurred while reading CRTC information\n");
/* Macros for printing CRTC information. */
#define print2(TYPE, FIELD_ID, DESCRIPTION, FIELD_VAR, ERROR_VAR) \
print_crtc_information_##TYPE(fields & FIELD_ID, DESCRIPTION, info.ERROR_VAR, info.FIELD_VAR);
#define print(TYPE, FIELD_ID, DESCRIPTION, FIELD_VAR) \
print2(TYPE, FIELD_ID, DESCRIPTION, FIELD_VAR, FIELD_VAR##_error);
/* Print CRTC information. */
printf("CRTC information:\n");
/* Print the EDID field. */
if ((fields & LIBGAMMA_CRTC_INFO_EDID))
{
if (info.edid_error)
libgamma_perror(" (error) EDID", info.edid_error);
else
{
char* edid_lc = libgamma_behex_edid(info.edid, info.edid_length);
unsigned char* edid_raw = libgamma_unhex_edid(edid_lc);
char* edid_uc = libgamma_behex_edid_uppercase(edid_raw, info.edid_length);;
printf(" EDID: %s\n", edid_lc);
printf(" EDID (uppercase): %s\n", edid_uc);
printf(" EDID (length): %lu\n", info.edid_length);
free(edid_lc);
free(edid_raw);
free(edid_uc);
}
}
/* Print physical dimensions of the monitor. */
print(size_t, LIBGAMMA_CRTC_INFO_WIDTH_MM, "width", width_mm);
print(size_t, LIBGAMMA_CRTC_INFO_HEIGHT_MM, "height", height_mm);
print(size_t, LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID, "width per EDID", width_mm_edid);
print(size_t, LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID, "height per EDID", height_mm_edid);
/* Print gamma ramp information. */
print2(size_t, LIBGAMMA_CRTC_INFO_GAMMA_SIZE, "red gamma ramp size", red_gamma_size, gamma_size_error);
print2(size_t, LIBGAMMA_CRTC_INFO_GAMMA_SIZE, "green gamma ramp size", green_gamma_size, gamma_size_error);
print2(size_t, LIBGAMMA_CRTC_INFO_GAMMA_SIZE, "blue gamma ramp size", blue_gamma_size, gamma_size_error);
print(signed, LIBGAMMA_CRTC_INFO_GAMMA_DEPTH, "gamma ramp depth", gamma_depth);
print(int, LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT, "gamma support", gamma_support);
/* Print subpixel order for the monitor. */
if ((fields & LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER))
{
if (info.subpixel_order_error)
libgamma_perror(" (error) subpixel order", info.subpixel_order_error);
else
printf(" subpixel order: %s\n", subpixel_order_str(info.subpixel_order));
}
/* Print connector information. */
print(int, LIBGAMMA_CRTC_INFO_ACTIVE, "active", active);
print(str, LIBGAMMA_CRTC_INFO_CONNECTOR_NAME, "connector name", connector_name);
if ((fields & LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE))
{
if (info.connector_type_error)
libgamma_perror(" (error) subpixel order", info.connector_type_error);
else
printf(" subpixel order: %s\n", connector_type_str(info.connector_type));
}
/* Print the gamma characteristics of the monitor. */
print2(float, LIBGAMMA_CRTC_INFO_GAMMA, "red gamma characteristics", gamma_red, gamma_error);
print2(float, LIBGAMMA_CRTC_INFO_GAMMA, "green gamma characteristics", gamma_green, gamma_error);
print2(float, LIBGAMMA_CRTC_INFO_GAMMA, "blue gamma characteristics", gamma_blue, gamma_error);
printf("\n");
#undef print
#undef print2
/* Release resouces. */
free(info.edid);
free(info.connector_name);
}
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