diff options
Diffstat (limited to '')
| -rw-r--r-- | gamma-w32-gdi.c | 360 |
1 files changed, 0 insertions, 360 deletions
diff --git a/gamma-w32-gdi.c b/gamma-w32-gdi.c deleted file mode 100644 index e93b53d..0000000 --- a/gamma-w32-gdi.c +++ /dev/null @@ -1,360 +0,0 @@ -/* 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; -} |