add header files for the gamma methods

Signed-off-by: Mattias Andrée <maandree@operamail.com>

7 files changed, 1635 insertions, 15 deletions

diff --git a/src/gamma-drm.h b/src/gamma-drm.h
new file mode 100644
index 0000000..ddb0512
--- /dev/null
+++ b/src/gamma-drm.h
@@ -0,0 +1,270 @@
+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 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/>.
+ */
+#ifndef LIBGAMMA_GAMMA_DRM_H
+#define LIBGAMMA_GAMMA_DRM_H
+
+
+#ifndef HAVE_GAMMA_METHOD_DRM
+# error Compiling gamma-drm without HAVE_GAMMA_METHOD_DRM
+#endif
+
+
+#include "libgamma-method.h"
+
+
+/**
+ * Return the capabilities of the adjustment method
+ * 
+ * @param  this  The data structure to fill with the method's capabilities
+ */
+void libgamma_drm_method_capabilities(libgamma_method_capabilities_t* restrict this);
+
+/**
+ * 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. One 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_drm_site_initialise(libgamma_site_state_t* restrict this,
+				 char* restrict site);
+
+/**
+ * Release all resources held by a site state
+ * 
+ * @param  this  The site state
+ */
+void libgamma_drm_site_destroy(libgamma_site_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_drm_site_restore(libgamma_site_state_t* restrict this);
+
+
+/**
+ * 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_drm_partition_initialise(libgamma_partition_state_t* restrict this,
+				      libgamma_site_state_t* restrict site, size_t partition);
+
+/**
+ * Release all resources held by a partition state
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_drm_partition_destroy(libgamma_partition_state_t* restrict this);
+
+/**
+ * Release all resources held by a partition state
+ * and free the partition state pointer
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_drm_partition_free(libgamma_partition_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_drm_partition_restore(libgamma_partition_state_t* restrict this);
+
+
+/**
+ * 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_drm_crtc_initialise(libgamma_crtc_state_t* restrict this,
+				 libgamma_partition_state_t* restrict partition, size_t crtc);
+
+/**
+ * Release all resources held by a CRTC state
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_drm_crtc_destroy(libgamma_crtc_state_t* restrict this);
+
+/**
+ * Release all resources held by a CRTC state
+ * and free the CRTC state pointer
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_drm_crtc_free(libgamma_crtc_state_t* restrict 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_drm_crtc_restore(libgamma_crtc_state_t* restrict this);
+
+
+/**
+ * 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_drm_get_crtc_information(libgamma_crtc_information_t* restrict this,
+				      libgamma_crtc_state_t* restrict crtc, int32_t fields);
+
+/**
+ * Get current the 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_drm_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
+				      libgamma_gamma_ramps_t* restrict ramps);
+
+/**
+ * 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_drm_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
+				      libgamma_gamma_ramps_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 32-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_drm_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					libgamma_gamma_ramps32_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 32-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_drm_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					libgamma_gamma_ramps32_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 64-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_drm_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					libgamma_gamma_ramps64_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 64-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_drm_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					libgamma_gamma_ramps64_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, `float` 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_drm_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+				       libgamma_gamma_rampsf_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `float` 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_drm_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+				       libgamma_gamma_rampsf_t ramps);
+
+/**
+ * Get current the gamma ramps for a CRTC, `double` 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_drm_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+				       libgamma_gamma_rampsd_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `double` 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_drm_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+				       libgamma_gamma_rampsd_t ramps);
+
+
+#endif
+
diff --git a/src/gamma-dummy.h b/src/gamma-dummy.h
new file mode 100644
index 0000000..24bffa3
--- /dev/null
+++ b/src/gamma-dummy.h
@@ -0,0 +1,270 @@
+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 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/>.
+ */
+#ifndef LIBGAMMA_GAMMA_DUMMY_H
+#define LIBGAMMA_GAMMA_DUMMY_H
+
+
+#ifndef HAVE_GAMMA_METHOD_DUMMY
+# error Compiling gamma-randr without HAVE_GAMMA_METHOD_DUMMY
+#endif
+
+
+#include "libgamma-method.h"
+
+
+/**
+ * Return the capabilities of the adjustment method
+ * 
+ * @param  this  The data structure to fill with the method's capabilities
+ */
+void libgamma_dummy_method_capabilities(libgamma_method_capabilities_t* restrict this);
+
+/**
+ * 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. One 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_dummy_site_initialise(libgamma_site_state_t* restrict this,
+				   char* restrict site);
+
+/**
+ * Release all resources held by a site state
+ * 
+ * @param  this  The site state
+ */
+void libgamma_dummy_site_destroy(libgamma_site_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_dummy_site_restore(libgamma_site_state_t* restrict this);
+
+
+/**
+ * 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_dummy_partition_initialise(libgamma_partition_state_t* restrict this,
+					libgamma_site_state_t* restrict site, size_t partition);
+
+/**
+ * Release all resources held by a partition state
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_dummy_partition_destroy(libgamma_partition_state_t* restrict this);
+
+/**
+ * Release all resources held by a partition state
+ * and free the partition state pointer
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_dummy_partition_free(libgamma_partition_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_dummy_partition_restore(libgamma_partition_state_t* restrict this);
+
+
+/**
+ * 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_dummy_crtc_initialise(libgamma_crtc_state_t* restrict this,
+				   libgamma_partition_state_t* restrict partition, size_t crtc);
+
+/**
+ * Release all resources held by a CRTC state
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_dummy_crtc_destroy(libgamma_crtc_state_t* restrict this);
+
+/**
+ * Release all resources held by a CRTC state
+ * and free the CRTC state pointer
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_dummy_crtc_free(libgamma_crtc_state_t* restrict 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_dummy_crtc_restore(libgamma_crtc_state_t* restrict this);
+
+
+/**
+ * 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_dummy_get_crtc_information(libgamma_crtc_information_t* restrict this,
+					libgamma_crtc_state_t* restrict crtc, int32_t fields);
+
+/**
+ * Get current the 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_dummy_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					libgamma_gamma_ramps_t* restrict ramps);
+
+/**
+ * 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_dummy_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					libgamma_gamma_ramps_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 32-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_dummy_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps32_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 32-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_dummy_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps32_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 64-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_dummy_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps64_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 64-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_dummy_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps64_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, `float` 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_dummy_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_rampsf_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `float` 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_dummy_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_rampsf_t ramps);
+
+/**
+ * Get current the gamma ramps for a CRTC, `double` 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_dummy_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_rampsd_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `double` 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_dummy_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_rampsd_t ramps);
+
+
+#endif
+
diff --git a/src/gamma-quartz-cg.h b/src/gamma-quartz-cg.h
new file mode 100644
index 0000000..c5f8916
--- /dev/null
+++ b/src/gamma-quartz-cg.h
@@ -0,0 +1,270 @@
+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 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/>.
+ */
+#ifndef LIBGAMMA_GAMMA_QUARTZ_CG_H
+#define LIBGAMMA_GAMMA_QUARTZ_CG_H
+
+
+#ifndef HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
+# error Compiling gamma-quartz-cg without HAVE_GAMMA_METHOD_QUARTZ_CORE_GRAPHICS
+#endif
+
+
+#include "libgamma-method.h"
+
+
+/**
+ * Return the capabilities of the adjustment method
+ * 
+ * @param  this  The data structure to fill with the method's capabilities
+ */
+void libgamma_quartz_cg_method_capabilities(libgamma_method_capabilities_t* restrict this);
+
+/**
+ * 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. One 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_quartz_cg_site_initialise(libgamma_site_state_t* restrict this,
+				       char* restrict site);
+
+/**
+ * Release all resources held by a site state
+ * 
+ * @param  this  The site state
+ */
+void libgamma_quartz_cg_site_destroy(libgamma_site_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_quartz_cg_site_restore(libgamma_site_state_t* restrict this);
+
+
+/**
+ * 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_quartz_cg_partition_initialise(libgamma_partition_state_t* restrict this,
+					    libgamma_site_state_t* restrict site, size_t partition);
+
+/**
+ * Release all resources held by a partition state
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_quartz_cg_partition_destroy(libgamma_partition_state_t* restrict this);
+
+/**
+ * Release all resources held by a partition state
+ * and free the partition state pointer
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_quartz_cg_partition_free(libgamma_partition_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_quartz_cg_partition_restore(libgamma_partition_state_t* restrict this);
+
+
+/**
+ * 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_quartz_cg_crtc_initialise(libgamma_crtc_state_t* restrict this,
+				       libgamma_partition_state_t* restrict partition, size_t crtc);
+
+/**
+ * Release all resources held by a CRTC state
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_quartz_cg_crtc_destroy(libgamma_crtc_state_t* restrict this);
+
+/**
+ * Release all resources held by a CRTC state
+ * and free the CRTC state pointer
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_quartz_cg_crtc_free(libgamma_crtc_state_t* restrict 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_quartz_cg_crtc_restore(libgamma_crtc_state_t* restrict this);
+
+
+/**
+ * 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_quartz_cg_get_crtc_information(libgamma_crtc_information_t* restrict this,
+					    libgamma_crtc_state_t* restrict crtc, int32_t fields);
+
+/**
+ * Get current the 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_quartz_cg_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					    libgamma_gamma_ramps_t* restrict ramps);
+
+/**
+ * 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_quartz_cg_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					    libgamma_gamma_ramps_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 32-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_quartz_cg_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					      libgamma_gamma_ramps32_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 32-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_quartz_cg_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					      libgamma_gamma_ramps32_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 64-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_quartz_cg_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					      libgamma_gamma_ramps64_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 64-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_quartz_cg_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					      libgamma_gamma_ramps64_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, `float` 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_quartz_cg_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					     libgamma_gamma_rampsf_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `float` 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_quartz_cg_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					     libgamma_gamma_rampsf_t ramps);
+
+/**
+ * Get current the gamma ramps for a CRTC, `double` 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_quartz_cg_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					     libgamma_gamma_rampsd_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `double` 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_quartz_cg_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					     libgamma_gamma_rampsd_t ramps);
+
+
+#endif
+
diff --git a/src/gamma-randr.h b/src/gamma-randr.h
new file mode 100644
index 0000000..3483a5e
--- /dev/null
+++ b/src/gamma-randr.h
@@ -0,0 +1,270 @@
+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 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/>.
+ */
+#ifndef LIBGAMMA_GAMMA_RANDR_H
+#define LIBGAMMA_GAMMA_RANDR_H
+
+
+#ifndef HAVE_GAMMA_METHOD_RANDR
+# error Compiling gamma-randr without HAVE_GAMMA_METHOD_RANDR
+#endif
+
+
+#include "libgamma-method.h"
+
+
+/**
+ * Return the capabilities of the adjustment method
+ * 
+ * @param  this  The data structure to fill with the method's capabilities
+ */
+void libgamma_randr_method_capabilities(libgamma_method_capabilities_t* restrict this);
+
+/**
+ * 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. One 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_randr_site_initialise(libgamma_site_state_t* restrict this,
+				   char* restrict site);
+
+/**
+ * Release all resources held by a site state
+ * 
+ * @param  this  The site state
+ */
+void libgamma_randr_site_destroy(libgamma_site_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_randr_site_restore(libgamma_site_state_t* restrict this);
+
+
+/**
+ * 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_randr_partition_initialise(libgamma_partition_state_t* restrict this,
+					libgamma_site_state_t* restrict site, size_t partition);
+
+/**
+ * Release all resources held by a partition state
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_randr_partition_destroy(libgamma_partition_state_t* restrict this);
+
+/**
+ * Release all resources held by a partition state
+ * and free the partition state pointer
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_randr_partition_free(libgamma_partition_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_randr_partition_restore(libgamma_partition_state_t* restrict this);
+
+
+/**
+ * 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_randr_crtc_initialise(libgamma_crtc_state_t* restrict this,
+				   libgamma_partition_state_t* restrict partition, size_t crtc);
+
+/**
+ * Release all resources held by a CRTC state
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_randr_crtc_destroy(libgamma_crtc_state_t* restrict this);
+
+/**
+ * Release all resources held by a CRTC state
+ * and free the CRTC state pointer
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_randr_crtc_free(libgamma_crtc_state_t* restrict 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_randr_crtc_restore(libgamma_crtc_state_t* restrict this);
+
+
+/**
+ * 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_randr_get_crtc_information(libgamma_crtc_information_t* restrict this,
+					libgamma_crtc_state_t* restrict crtc, int32_t fields);
+
+/**
+ * Get current the 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_randr_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					libgamma_gamma_ramps_t* restrict ramps);
+
+/**
+ * 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_randr_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					libgamma_gamma_ramps_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 32-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_randr_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps32_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 32-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_randr_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps32_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 64-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_randr_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps64_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 64-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_randr_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps64_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, `float` 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_randr_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_rampsf_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `float` 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_randr_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_rampsf_t ramps);
+
+/**
+ * Get current the gamma ramps for a CRTC, `double` 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_randr_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_rampsd_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `double` 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_randr_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_rampsd_t ramps);
+
+
+#endif
+
diff --git a/src/gamma-vidmode.h b/src/gamma-vidmode.h
new file mode 100644
index 0000000..e9db63d
--- /dev/null
+++ b/src/gamma-vidmode.h
@@ -0,0 +1,270 @@
+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 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/>.
+ */
+#ifndef LIBGAMMA_GAMMA_VIDMODE_H
+#define LIBGAMMA_GAMMA_VIDMODE_H
+
+
+#ifndef HAVE_GAMMA_METHOD_VIDMODE
+# error Compiling gamma-vidmode without HAVE_GAMMA_METHOD_VIDMODE
+#endif
+
+
+#include "libgamma-method.h"
+
+
+/**
+ * Return the capabilities of the adjustment method
+ * 
+ * @param  this  The data structure to fill with the method's capabilities
+ */
+void libgamma_vidmode_method_capabilities(libgamma_method_capabilities_t* restrict this);
+
+/**
+ * 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. One 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_vidmode_site_initialise(libgamma_site_state_t* restrict this,
+				     char* restrict site);
+
+/**
+ * Release all resources held by a site state
+ * 
+ * @param  this  The site state
+ */
+void libgamma_vidmode_site_destroy(libgamma_site_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_vidmode_site_restore(libgamma_site_state_t* restrict this);
+
+
+/**
+ * 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_vidmode_partition_initialise(libgamma_partition_state_t* restrict this,
+					  libgamma_site_state_t* restrict site, size_t partition);
+
+/**
+ * Release all resources held by a partition state
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_vidmode_partition_destroy(libgamma_partition_state_t* restrict this);
+
+/**
+ * Release all resources held by a partition state
+ * and free the partition state pointer
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_vidmode_partition_free(libgamma_partition_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_vidmode_partition_restore(libgamma_partition_state_t* restrict this);
+
+
+/**
+ * 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_vidmode_crtc_initialise(libgamma_crtc_state_t* restrict this,
+				     libgamma_partition_state_t* restrict partition, size_t crtc);
+
+/**
+ * Release all resources held by a CRTC state
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_vidmode_crtc_destroy(libgamma_crtc_state_t* restrict this);
+
+/**
+ * Release all resources held by a CRTC state
+ * and free the CRTC state pointer
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_vidmode_crtc_free(libgamma_crtc_state_t* restrict 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_vidmode_crtc_restore(libgamma_crtc_state_t* restrict this);
+
+
+/**
+ * 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_vidmode_get_crtc_information(libgamma_crtc_information_t* restrict this,
+					  libgamma_crtc_state_t* restrict crtc, int32_t fields);
+
+/**
+ * Get current the 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_vidmode_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps_t* restrict ramps);
+
+/**
+ * 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_vidmode_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_ramps_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 32-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_vidmode_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					    libgamma_gamma_ramps32_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 32-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_vidmode_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					    libgamma_gamma_ramps32_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 64-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_vidmode_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					    libgamma_gamma_ramps64_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 64-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_vidmode_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					    libgamma_gamma_ramps64_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, `float` 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_vidmode_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					   libgamma_gamma_rampsf_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `float` 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_vidmode_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					   libgamma_gamma_rampsf_t ramps);
+
+/**
+ * Get current the gamma ramps for a CRTC, `double` 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_vidmode_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					   libgamma_gamma_rampsd_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `double` 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_vidmode_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					   libgamma_gamma_rampsd_t ramps);
+
+
+#endif
+
diff --git a/src/gamma-w32gdi.h b/src/gamma-w32gdi.h
new file mode 100644
index 0000000..d1299bf
--- /dev/null
+++ b/src/gamma-w32gdi.h
@@ -0,0 +1,270 @@
+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 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/>.
+ */
+#ifndef LIBGAMMA_GAMMA_W32GDI_H
+#define LIBGAMMA_GAMMA_W32GDI_H
+
+
+#ifndef HAVE_GAMMA_METHOD_W32_GDI
+# error Compiling gamma-w32gdi without HAVE_GAMMA_METHOD_W32_GDI
+#endif
+
+
+#include "libgamma-method.h"
+
+
+/**
+ * Return the capabilities of the adjustment method
+ * 
+ * @param  this  The data structure to fill with the method's capabilities
+ */
+void libgamma_w32gdi_method_capabilities(libgamma_method_capabilities_t* restrict this);
+
+/**
+ * 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. One 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_w32gdi_site_initialise(libgamma_site_state_t* restrict this,
+				    char* restrict site);
+
+/**
+ * Release all resources held by a site state
+ * 
+ * @param  this  The site state
+ */
+void libgamma_w32gdi_site_destroy(libgamma_site_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_w32gdi_site_restore(libgamma_site_state_t* restrict this);
+
+
+/**
+ * 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_w32gdi_partition_initialise(libgamma_partition_state_t* restrict this,
+					 libgamma_site_state_t* restrict site, size_t partition);
+
+/**
+ * Release all resources held by a partition state
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_w32gdi_partition_destroy(libgamma_partition_state_t* restrict this);
+
+/**
+ * Release all resources held by a partition state
+ * and free the partition state pointer
+ * 
+ * @param  this  The partition state
+ */
+void libgamma_w32gdi_partition_free(libgamma_partition_state_t* restrict this);
+
+/**
+ * Restore the gamma ramps all CRTCS 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_w32gdi_partition_restore(libgamma_partition_state_t* restrict this);
+
+
+/**
+ * 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_w32gdi_crtc_initialise(libgamma_crtc_state_t* restrict this,
+				    libgamma_partition_state_t* restrict partition, size_t crtc);
+
+/**
+ * Release all resources held by a CRTC state
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_w32gdi_crtc_destroy(libgamma_crtc_state_t* restrict this);
+
+/**
+ * Release all resources held by a CRTC state
+ * and free the CRTC state pointer
+ * 
+ * @param  this  The CRTC state
+ */
+void libgamma_w32gdi_crtc_free(libgamma_crtc_state_t* restrict 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_w32gdi_crtc_restore(libgamma_crtc_state_t* restrict this);
+
+
+/**
+ * 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_w32gdi_get_crtc_information(libgamma_crtc_information_t* restrict this,
+					 libgamma_crtc_state_t* restrict crtc, int32_t fields);
+
+/**
+ * Get current the 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_w32gdi_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_ramps_t* restrict ramps);
+
+/**
+ * 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_w32gdi_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
+					 libgamma_gamma_ramps_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 32-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_w32gdi_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					   libgamma_gamma_ramps32_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 32-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_w32gdi_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
+					   libgamma_gamma_ramps32_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, 64-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_w32gdi_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					   libgamma_gamma_ramps64_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, 64-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_w32gdi_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
+					   libgamma_gamma_ramps64_t ramps);
+
+
+/**
+ * Get current the gamma ramps for a CRTC, `float` 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_w32gdi_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_rampsf_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `float` 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_w32gdi_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_rampsf_t ramps);
+
+/**
+ * Get current the gamma ramps for a CRTC, `double` 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_w32gdi_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_rampsd_t* restrict ramps);
+
+/**
+ * Set the gamma ramps for a CRTC, `double` 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_w32gdi_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
+					  libgamma_gamma_rampsd_t ramps);
+
+
+#endif
+
diff --git a/src/libgamma-facade.c b/src/libgamma-facade.c
index ed23e9f..07dfd9b 100644
--- a/src/libgamma-facade.c
+++ b/src/libgamma-facade.c
@@ -822,7 +822,7 @@ unsigned char* libgamma_unhex_edid(const char* restrict edid)
  * Get current the gamma ramps for a CRTC, 16-bit gamma-depth version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to fill with the current values
+ * @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
  */
@@ -870,7 +870,7 @@ int libgamma_crtc_get_gamma_ramps(libgamma_crtc_state_t* restrict this,
  * Set the gamma ramps for a CRTC, 16-bit gamma-depth version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -919,7 +919,7 @@ int libgamma_crtc_set_gamma_ramps(libgamma_crtc_state_t* restrict this,
  * Get current the gamma ramps for a CRTC, 32-bit gamma-depth version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to fill with the current values
+ * @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
  */
@@ -967,7 +967,7 @@ int libgamma_crtc_get_gamma_ramps32(libgamma_crtc_state_t* restrict this,
  * Set the gamma ramps for a CRTC, 32-bit gamma-depth version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -1016,7 +1016,7 @@ int libgamma_crtc_set_gamma_ramps32(libgamma_crtc_state_t* restrict this,
  * Get current the gamma ramps for a CRTC, 64-bit gamma-depth version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to fill with the current values
+ * @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
  */
@@ -1064,7 +1064,7 @@ int libgamma_crtc_get_gamma_ramps64(libgamma_crtc_state_t* restrict this,
  * Set the gamma ramps for a CRTC, 64-bit gamma-depth version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -1113,7 +1113,7 @@ int libgamma_crtc_set_gamma_ramps64(libgamma_crtc_state_t* restrict this,
  * Get current the gamma ramps for a CRTC, `float` version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to fill with the current values
+ * @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
  */
@@ -1161,7 +1161,7 @@ int libgamma_crtc_get_gamma_rampsf(libgamma_crtc_state_t* restrict this,
  * Set the gamma ramps for a CRTC, `float` version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -1210,7 +1210,7 @@ int libgamma_crtc_set_gamma_rampsf(libgamma_crtc_state_t* restrict this,
  * Get current the gamma ramps for a CRTC, `double` version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to fill with the current values
+ * @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
  */
@@ -1258,7 +1258,7 @@ int libgamma_crtc_get_gamma_rampsd(libgamma_crtc_state_t* restrict this,
  * Set the gamma ramps for a CRTC, `double` version
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -1309,7 +1309,7 @@ int libgamma_crtc_set_gamma_rampsd(libgamma_crtc_state_t* restrict this,
  * Note that this will probably involve the library allocating temporary data
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -1362,7 +1362,7 @@ int libgamma_crtc_set_gamma_ramps_f(libgamma_crtc_state_t* restrict this,
  * Note that this will probably involve the library allocating temporary data
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -1415,7 +1415,7 @@ int libgamma_crtc_set_gamma_ramps32_f(libgamma_crtc_state_t* restrict this,
  * Note that this will probably involve the library allocating temporary data
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -1468,7 +1468,7 @@ int libgamma_crtc_set_gamma_ramps64_f(libgamma_crtc_state_t* restrict this,
  * Note that this will probably involve the library allocating temporary data
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */
@@ -1521,7 +1521,7 @@ int libgamma_crtc_set_gamma_rampsf_f(libgamma_crtc_state_t* restrict this,
  * Note that this will probably involve the library allocating temporary data
  * 
  * @param   this   The CRTC state
- * @parma   ramps  The gamma ramps to apply
+ * @param   ramps  The gamma ramps to apply
  * @return         Zero on success, otherwise (negative) the value of an
  *                 error identifier provided by this library
  */