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Diffstat (limited to 'src/lib/gamma-x-vidmode.c')
-rw-r--r--src/lib/gamma-x-vidmode.c40
1 files changed, 29 insertions, 11 deletions
diff --git a/src/lib/gamma-x-vidmode.c b/src/lib/gamma-x-vidmode.c
index a73f36f..170d3b4 100644
--- a/src/lib/gamma-x-vidmode.c
+++ b/src/lib/gamma-x-vidmode.c
@@ -38,19 +38,26 @@
void libgamma_x_vidmode_method_capabilities(libgamma_method_capabilities_t* restrict this)
{
char* restrict display = getenv("DISPLAY");
+ /* Gamma ramps size anddepth can be queried. */
this->crtc_information = LIBGAMMA_CRTC_INFO_GAMMA_SIZE
| LIBGAMMA_CRTC_INFO_GAMMA_DEPTH;
+ /* X VidMode supports multiple sits and partitions but not CRTC:s. */
this->default_site_known = (display && *display);
this->multiple_sites = 1;
this->multiple_partitions = 1;
- this->multiple_crtcs = 1;
+ this->multiple_crtcs = 0;
+ /* Partitions are screens and not graphics cards in X. */
this->partitions_are_graphics_cards = 0;
+ /* X does not have system restore capabilities. */
this->site_restore = 0;
this->partition_restore = 0;
this->crtc_restore = 0;
+ /* Gamma ramp sizes are identical but not fixed. */
this->identical_gamma_sizes = 1;
this->fixed_gamma_size = 0;
+ /* Gamma ramp depths are fixed. */
this->fixed_gamma_depth = 1;
+ /* X VidMode is a real non-faked adjustment method */
this->real = 1;
this->fake = 0;
}
@@ -72,14 +79,17 @@ void libgamma_x_vidmode_method_capabilities(libgamma_method_capabilities_t* rest
int libgamma_x_vidmode_site_initialise(libgamma_site_state_t* restrict this,
char* restrict site)
{
+ /* Connect to the display. */
Display* restrict connection = XOpenDisplay(site);
int _major, _minor, screens;
if ((this->data = connection) == NULL)
return LIBGAMMA_OPEN_SITE_FAILED;
+ /* Query X VidMode extension protocol version. */
if (!XF86VidModeQueryVersion(connection, &_major, &_minor))
- return LIBGAMMA_PROTOCOL_VERSION_QUERY_FAILED;
+ return XCloseDisplay(connection), LIBGAMMA_PROTOCOL_VERSION_QUERY_FAILED;
+ /* Query the number of available screens. */
if ((screens = ScreenCount(connection)) < 0)
- return LIBGAMMA_NEGATIVE_PARTITION_COUNT;
+ return XCloseDisplay(connection), LIBGAMMA_NEGATIVE_PARTITION_COUNT;
this->partitions_available = (size_t)screens;
return 0;
}
@@ -123,10 +133,8 @@ int libgamma_x_vidmode_site_restore(libgamma_site_state_t* restrict this)
int libgamma_x_vidmode_partition_initialise(libgamma_partition_state_t* restrict this,
libgamma_site_state_t* restrict site, size_t partition)
{
- if (partition >= site->partitions_available)
- return LIBGAMMA_NO_SUCH_PARTITION;
this->crtcs_available = 1;
- return 0;
+ return partition >= site->partitions_available ? LIBGAMMA_NO_SUCH_PARTITION : 0;
}
@@ -213,35 +221,41 @@ int libgamma_x_vidmode_get_crtc_information(libgamma_crtc_information_t* restric
{
#define _E(FIELD) ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 0)
+ /* X VidMode 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);
this->gamma_size_error = 0;
+ /* X VidMode does support gamma ramp size query. The gamma
+ ramps are identical but not fixed, and the query can fail. */
if ((fields & LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT))
{
Display* restrict connection = crtc->partition->site->data;
- int stops;
+ int stops = 0;
if (!XF86VidModeGetGammaRampSize(connection, (int)(crtc->partition->partition), &stops))
this->gamma_size_error = LIBGAMMA_GAMMA_RAMPS_SIZE_QUERY_FAILED;
else if (stops < 2)
this->gamma_size_error = LIBGAMMA_SINGLETON_GAMMA_RAMP;
- else
- this->red_gamma_size = this->green_gamma_size = this->blue_gamma_size = (size_t)stops;
+ this->red_gamma_size = this->green_gamma_size = this->blue_gamma_size = (size_t)stops;
}
+ /* X VidMode uses 16-bit integer ramps. */
this->gamma_depth = 16;
this->gamma_depth_error = 0;
+ /* X VidMode does not support gamma ramp support queries. */
this->gamma_support_error = _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT);
+ /* X VidMode 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);
-#undef _E
+ /* We failed if gamma ramp size query failed or if an unsupport field was queried. */
+ return this->gamma_size_error || (fields & ~(LIBGAMMA_CRTC_INFO_GAMMA_DEPTH | LIBGAMMA_CRTC_INFO_GAMMA_SIZE)) ? -1 : 0;
- return (fields & ~(LIBGAMMA_CRTC_INFO_GAMMA_DEPTH | LIBGAMMA_CRTC_INFO_GAMMA_SIZE)) ? -1 : this->gamma_size_error;
+#undef _E
}
@@ -257,10 +271,12 @@ int libgamma_x_vidmode_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this
libgamma_gamma_ramps_t* restrict ramps)
{
#ifdef DEBUG
+ /* Gamma ramp sizes are identical but not fixed. */
if ((ramps->red_size != ramps->green_size) ||
(ramps->red_size != ramps->blue_size))
return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
#endif
+ /* Read current gamma ramps. */
if (!XF86VidModeGetGammaRamp((Display*)(this->partition->site->data), (int)(this->partition->partition),
(int)(ramps->red_size), ramps->red, ramps->green, ramps->blue))
return LIBGAMMA_GAMMA_RAMP_READ_FAILED;
@@ -280,10 +296,12 @@ int libgamma_x_vidmode_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this
libgamma_gamma_ramps_t ramps)
{
#ifdef DEBUG
+ /* Gamma ramp sizes are identical but not fixed. */
if ((ramps.red_size != ramps.green_size) ||
(ramps.red_size != ramps.blue_size))
return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
#endif
+ /* Apply gamma ramps. */
if (!XF86VidModeSetGammaRamp((Display*)(this->partition->site->data), (int)(this->partition->partition),
(int)(ramps.red_size), ramps.red, ramps.green, ramps.blue))
return LIBGAMMA_GAMMA_RAMP_WRITE_FAILED;