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

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

1 files changed, 360 insertions, 0 deletions

diff --git a/gamma-w32-gdi.c b/gamma-w32-gdi.c
new file mode 100644
index 0000000..e93b53d
--- /dev/null
+++ b/gamma-w32-gdi.c
@@ -0,0 +1,360 @@
+/* See LICENSE file for copyright and license details. */
+#ifndef HAVE_LIBGAMMA_METHOD_W32_GDI
+# error Compiling gamma-w32-gdi.c without HAVE_LIBGAMMA_METHOD_W32_GDI
+#endif
+
+#include "gamma-w32-gdi.h"
+
+#include "libgamma-error.h"
+
+#ifndef WINVER
+# define WINVER 0x0500
+#endif
+#ifdef FAKE_LIBGAMMA_METHOD_W32_GDI
+# include "fake-w32-gdi.h"
+#else
+# include <windows.h>
+# include <wingdi.h>
+#endif
+
+#include <errno.h>
+
+
+/**
+ * The gamma ramp size that devices will always have in Windows GDI
+ * 
+ * @see  http://msdn.microsoft.com/en-us/library/windows/desktop/dd372194(v=vs.85).aspx
+ */
+#define GAMMA_RAMP_SIZE 256
+
+
+/**
+ * Return the capabilities of the adjustment method
+ * 
+ * @param  this  The data structure to fill with the method's capabilities
+ */
+void
+libgamma_w32_gdi_method_capabilities(libgamma_method_capabilities_t *restrict this)
+{
+	/* Gamma ramps size, depth and support can be queried */
+	this->crtc_information = LIBGAMMA_CRTC_INFO_GAMMA_SIZE | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH;
+	/* Windows GDI does not support sites or partitions */
+	this->default_site_known = 1;
+	this->multiple_sites = 0;
+	this->multiple_partitions = 0;
+	/* Windows GDI does support CRTC:s */
+	this->multiple_crtcs = 1;
+	/* Partitions are not supported... */
+	this->partitions_are_graphics_cards = 0;
+	/* Windows GDI does not have system restore capabilities */
+	this->site_restore = 0;
+	this->partition_restore = 0;
+	this->crtc_restore = 0;
+	/* Ramps sizes are fixed and identical and ramp depth is too */
+	this->identical_gamma_sizes = 1;
+	this->fixed_gamma_size = 1;
+	this->fixed_gamma_depth = 1;
+	/* Windows GDI is a real adjustment method that can be faked */
+#ifdef FAKE_LIBGAMMA_METHOD_W32_GDI
+	/* It is considered real but fake if it is translated to X RandR */
+	this->fake = 1;
+# ifdef HAVE_LIBGAMMA_METHOD_X_RANDR
+	this->real = 1;
+# else
+	this->real = 0;
+# endif
+#else
+	/* It is real and not fake if we are running on Windows */
+	this->fake = 0;
+	this->real = 1;
+#endif
+	/* 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_w32_gdi_site_initialise(libgamma_site_state_t *restrict this, char* restrict site)
+{
+	this->partitions_available = 1;
+	return !site ? 0 : LIBGAMMA_NO_SUCH_SITE;
+}
+
+
+/**
+ * Release all resources held by a site state
+ * 
+ * @param  this  The site state
+ */
+void
+libgamma_w32_gdi_site_destroy(libgamma_site_state_t *restrict this)
+{
+	(void) this;
+}
+
+
+/**
+ * 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_w32_gdi_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_w32_gdi_partition_initialise(libgamma_partition_state_t *restrict this,
+                                      libgamma_site_state_t *restrict site, size_t partition)
+{
+	DWORD n = 0;
+	DISPLAY_DEVICE display;
+
+	(void) site;
+
+	if (partition)
+		return LIBGAMMA_NO_SUCH_PARTITION;
+
+	/* Count CRTC:s by iteration over all possible identifiers
+	   until we reach on that does not exist */
+	display.cb = sizeof(DISPLAY_DEVICE);
+	while (EnumDisplayDevices(NULL, n, &display, 0))
+		if (n++ == UINT32_MAX)
+			return LIBGAMMA_IMPOSSIBLE_AMOUNT;
+	this->crtcs_available = (size_t)n;
+	return 0;
+}
+
+
+/**
+ * Release all resources held by a partition state
+ * 
+ * @param  this  The partition state
+ */
+void
+libgamma_w32_gdi_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_w32_gdi_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_w32_gdi_crtc_initialise(libgamma_crtc_state_t *restrict this,
+                                 libgamma_partition_state_t *restrict partition, size_t crtc)
+{
+	DISPLAY_DEVICE display;
+	HDC context;
+
+	(void) partition;
+
+	this->data = NULL;
+
+	/* Windows's API mandates this... */
+	display.cb = sizeof(DISPLAY_DEVICE);
+	/* Get identifier for selected CRTC */
+	if (!EnumDisplayDevices(NULL, (DWORD)crtc, &display, 0))
+		return LIBGAMMA_NO_SUCH_CRTC;
+	/* Check that the connector is enabled,
+	 * newer versions of Windows will always pass.
+	 * (According to w32's documentation, but that
+	 * that is a load of crap) */
+	if (!(display.StateFlags & DISPLAY_DEVICE_ACTIVE))
+		return LIBGAMMA_CONNECTOR_DISABLED;
+	/* Acquire CRTC connection. */
+	context = CreateDC(TEXT("DISPLAY"), display.DeviceName, NULL, NULL);
+	if (!context)
+		return LIBGAMMA_OPEN_CRTC_FAILED;
+	this->data = context;
+	return 0;
+}
+
+
+/**
+ * Release all resources held by a CRTC state
+ * 
+ * @param  this  The CRTC state
+ */
+void
+libgamma_w32_gdi_crtc_destroy(libgamma_crtc_state_t *restrict this)
+{
+	if (this->data)
+		ReleaseDC(NULL, this->data);
+}
+
+
+/**
+ * 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_w32_gdi_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. On error refer to the error reports in `this`
+ */
+int
+libgamma_w32_gdi_get_crtc_information(libgamma_crtc_information_t *restrict this,
+                                      libgamma_crtc_state_t *restrict crtc, int32_t fields)
+{
+#define KNOWN_FIELDS (LIBGAMMA_CRTC_INFO_GAMMA_SIZE | LIBGAMMA_CRTC_INFO_GAMMA_DEPTH)
+#define _E(FIELD)    ((fields & FIELD) ? LIBGAMMA_CRTC_INFO_NOT_SUPPORTED : 0)
+
+	(void) crtc;
+
+	/* Windows GDI 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);
+	/* Windows GDI have fixed gamma ramp sizes */
+	this->red_gamma_size = GAMMA_RAMP_SIZE;
+	this->green_gamma_size = GAMMA_RAMP_SIZE;
+	this->blue_gamma_size = GAMMA_RAMP_SIZE;
+	this->gamma_size_error = 0;
+	/* Windows GDI have fixed gamma ramp depth */
+	this->gamma_depth = 16;
+	this->gamma_depth_error = 0;
+	/* It is possible to query Windows GDI whether the device
+	   have gamma ramp support. It cannot fail. However, I think
+	   the result is incorrect if multiple monitors are active,
+	   so we cannot include this. */
+	/*
+	if ((fields & LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT))
+		this->gamma_support = GetDeviceCaps(crtc->data, COLORMGMTCAPS) == CM_GAMMA_RAMP;
+	this->gamma_support_error = 0;
+	*/
+	this->gamma_support_error = _E(LIBGAMMA_CRTC_INFO_GAMMA_SUPPORT);
+	/* Windows GDI 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);
+
+	/* There was a failure if and only if unsupport field was requested. */
+	return (fields & ~KNOWN_FIELDS) ? -1 : 0;
+
+#undef _E
+#undef KNOWN_FIELDS
+}
+
+
+/**
+ * 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_w32_gdi_crtc_get_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_t *restrict ramps)
+{
+#ifdef DEBUG
+	/* Windows GDI have fixed gamma ramp sizes */
+	if (ramps->  red_size != GAMMA_RAMP_SIZE ||
+	    ramps->green_size != GAMMA_RAMP_SIZE ||
+	    ramps-> blue_size != GAMMA_RAMP_SIZE)
+		return LIBGAMMA_WRONG_GAMMA_RAMP_SIZE;
+#endif
+	/* Read current gamma ramps */
+	if (!GetDeviceGammaRamp(this->data, ramps->red))
+		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_w32_gdi_crtc_set_gamma_ramps16(libgamma_crtc_state_t *restrict this, libgamma_gamma_ramps16_t ramps)
+{
+#ifdef DEBUG
+	/* Windows GDI have fixed gamma ramp sizes */
+	if (ramps.  red_size != GAMMA_RAMP_SIZE ||
+	    ramps.green_size != GAMMA_RAMP_SIZE ||
+	    ramps. blue_size != GAMMA_RAMP_SIZE)
+		return LIBGAMMA_WRONG_GAMMA_RAMP_SIZE;
+#endif
+	/* Apply gamma ramps */
+	if (!SetDeviceGammaRamp(this->data, ramps.red))
+		return LIBGAMMA_GAMMA_RAMP_WRITE_FAILED;
+	return 0;
+}