Split source files, merge public header files, eliminite use gpp, rewrite makefile

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

1 files changed, 312 insertions, 0 deletions

diff --git a/gamma-x-vidmode.c b/gamma-x-vidmode.c
new file mode 100644
index 0000000..bae9d31
--- /dev/null
+++ b/gamma-x-vidmode.c
@@ -0,0 +1,312 @@
+/* See LICENSE file for copyright and license details. */
+#ifndef HAVE_LIBGAMMA_METHOD_X_VIDMODE
+# error Compiling gamma-x-vidmode.c without HAVE_LIBGAMMA_METHOD_X_VIDMODE
+#endif
+
+#include "gamma-x-vidmode.h"
+
+#include "libgamma-error.h"
+
+#include <X11/Xlib.h>
+#include <X11/extensions/xf86vmode.h>
+
+#include <stdlib.h>
+#include <errno.h>
+
+
+/**
+ * Return the capabilities of the adjustment method
+ * 
+ * @param  this  The data structure to fill with the method's capabilities
+ */
+void
+libgamma_x_vidmode_method_capabilities(libgamma_method_capabilities_t *restrict this)
+{
+	char *restrict display = getenv("DISPLAY");
+	/* Gamma ramps size and depth can be queried */
+	this->crtc_information = LIBGAMMA_CRTC_INFO_GAMMA_SIZE | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH;
+	/* X VidMode supports multiple sites and partitions but not CRTC:s */
+	this->default_site_known = (display && *display) ? 1 : 0;
+	this->multiple_sites = 1;
+	this->multiple_partitions = 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;
+	/* Gamma ramp adjustments are persistent */
+	this->auto_restore = 0;
+}
+
+
+/**
+ * Initialise an allocated site state
+ * 
+ * @param   this    The site state to initialise
+ * @param   site    The site identifier, unless it is `NULL` it must a
+ *                  `free`:able. Once the state is destroyed the library
+ *                  will attempt to free it. There you should not free
+ *                  it yourself, and it must not be a string constant
+ *                  or allocate on the stack. Note however that it will
+ *                  not be free:d if this function fails.
+ * @return          Zero on success, otherwise (negative) the value of an
+ *                  error identifier provided by this library
+ */
+int
+libgamma_x_vidmode_site_initialise(libgamma_site_state_t *restrict this, char *restrict site)
+{
+	/* Connect to the display */
+	Display *restrict connection;
+	int _major, _minor, screens;
+	this->data = connection = XOpenDisplay(site);
+	if (!this->data)
+		return LIBGAMMA_OPEN_SITE_FAILED;
+	/* Query X VidMode extension protocol version */
+	if (!XF86VidModeQueryVersion(connection, &_major, &_minor)) {
+		XCloseDisplay(connection);
+		return LIBGAMMA_PROTOCOL_VERSION_QUERY_FAILED;
+	}
+	/* Query the number of available screens */
+	screens = ScreenCount(connection);
+	if (screens < 0) {
+		XCloseDisplay(connection);
+		return LIBGAMMA_NEGATIVE_PARTITION_COUNT;
+	}
+	this->partitions_available = (size_t)screens;
+	return 0;
+}
+
+
+/**
+ * Release all resources held by a site state
+ * 
+ * @param  this  The site state
+ */
+void
+libgamma_x_vidmode_site_destroy(libgamma_site_state_t *restrict this)
+{
+	XCloseDisplay((Display *)this->data);
+}
+
+
+/**
+ * Restore the gamma ramps all CRTC:s with a site to the system settings
+ * 
+ * @param   this  The site state
+ * @return        Zero on success, otherwise (negative) the value of an
+ *                error identifier provided by this library
+ */
+int
+libgamma_x_vidmode_site_restore(libgamma_site_state_t *restrict this)
+{
+	(void) this;
+	errno = ENOTSUP;
+	return LIBGAMMA_ERRNO_SET;
+}
+
+
+
+/**
+ * Initialise an allocated partition state
+ * 
+ * @param   this       The partition state to initialise
+ * @param   site       The site state for the site that the partition belongs to
+ * @param   partition  The the index of the partition within the site
+ * @return             Zero on success, otherwise (negative) the value of an
+ *                     error identifier provided by this library
+ */
+int
+libgamma_x_vidmode_partition_initialise(libgamma_partition_state_t *restrict this,
+                                        libgamma_site_state_t *restrict site, size_t partition)
+{
+	this->crtcs_available = 1;
+	return partition < site->partitions_available ? 0 : LIBGAMMA_NO_SUCH_PARTITION;
+}
+
+
+/**
+ * Release all resources held by a partition state
+ * 
+ * @param  this  The partition state
+ */
+void
+libgamma_x_vidmode_partition_destroy(libgamma_partition_state_t *restrict this)
+{
+	(void) this;
+}
+
+
+/**
+ * Restore the gamma ramps all CRTC:s with a partition to the system settings
+ * 
+ * @param   this  The partition state
+ * @return        Zero on success, otherwise (negative) the value of an
+ *                error identifier provided by this library
+ */
+int
+libgamma_x_vidmode_partition_restore(libgamma_partition_state_t *restrict this)
+{
+	(void) this;
+	errno = ENOTSUP;
+	return LIBGAMMA_ERRNO_SET;
+}
+
+
+
+/**
+ * Initialise an allocated CRTC state
+ * 
+ * @param   this       The CRTC state to initialise
+ * @param   partition  The partition state for the partition that the CRTC belongs to
+ * @param   crtc       The the index of the CRTC within the site
+ * @return             Zero on success, otherwise (negative) the value of an
+ *                     error identifier provided by this library
+ */
+int
+libgamma_x_vidmode_crtc_initialise(libgamma_crtc_state_t *restrict this,
+                                   libgamma_partition_state_t *restrict partition, size_t crtc)
+{
+	(void) this;
+	(void) partition;
+	return !crtc ? 0 : LIBGAMMA_NO_SUCH_CRTC;
+}
+
+
+/**
+ * Release all resources held by a CRTC state
+ * 
+ * @param  this  The CRTC state
+ */
+void
+libgamma_x_vidmode_crtc_destroy(libgamma_crtc_state_t *restrict this)
+{
+	(void) this;
+}
+
+
+/**
+ * Restore the gamma ramps for a CRTC to the system settings for that CRTC
+ * 
+ * @param   this  The CRTC state
+ * @return        Zero on success, otherwise (negative) the value of an
+ *                error identifier provided by this library
+ */
+int
+libgamma_x_vidmode_crtc_restore(libgamma_crtc_state_t *restrict this)
+{
+	(void) this;
+	errno = ENOTSUP;
+	return LIBGAMMA_ERRNO_SET;
+}
+
+
+
+/**
+ * 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; oOn error refer to the error reports in `this`
+ */
+int
+libgamma_x_vidmode_get_crtc_information(libgamma_crtc_information_t *restrict this,
+                                        libgamma_crtc_state_t *restrict crtc, int32_t fields)
+{
+#define _E(FIELD)  ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 0)
+
+	Display *restrict connection;
+	int stops = 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_SIZE)) {
+		connection = crtc->partition->site->data;
+		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;
+		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);
+
+	/* 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;
+
+#undef _E
+}
+
+
+/**
+ * Get the current gamma ramps for a CRTC, 16-bit gamma-depth version
+ * 
+ * @param   this   The CRTC state
+ * @param   ramps  The gamma ramps to fill with the current values
+ * @return         Zero on success, otherwise (negative) the value of an
+ *                 error identifier provided by this library
+ */
+int
+libgamma_x_vidmode_crtc_get_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_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;
+	return 0;
+}
+
+
+/**
+ * Set the gamma ramps for a CRTC, 16-bit gamma-depth version
+ * 
+ * @param   this   The CRTC state
+ * @param   ramps  The gamma ramps to apply
+ * @return         Zero on success, otherwise (negative) the value of an
+ *                 error identifier provided by this library
+ */
+int
+libgamma_x_vidmode_crtc_set_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_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;
+	return 0;
+}