diff options
Diffstat (limited to 'src/lib/gamma-w32-gdi.c')
| -rw-r--r-- | src/lib/gamma-w32-gdi.c | 437 |
1 files changed, 216 insertions, 221 deletions
diff --git a/src/lib/gamma-w32-gdi.c b/src/lib/gamma-w32-gdi.c index f9c8094..e93b53d 100644 --- a/src/lib/gamma-w32-gdi.c +++ b/src/lib/gamma-w32-gdi.c @@ -1,20 +1,4 @@ -/** - * libgamma -- Display server abstraction layer for gamma ramp adjustments - * Copyright (C) 2014, 2015 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/>. - */ +/* 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 @@ -24,7 +8,7 @@ #include "libgamma-error.h" #ifndef WINVER -# define WINVER 0x0500 +# define WINVER 0x0500 #endif #ifdef FAKE_LIBGAMMA_METHOD_W32_GDI # include "fake-w32-gdi.h" @@ -37,62 +21,62 @@ /** - * The gamma ramp size that devices will always have in Windows GDI. + * 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 +#define GAMMA_RAMP_SIZE 256 /** - * Return the capabilities of the adjustment method. + * Return the capabilities of the adjustment method * - * @param this The data structure to fill with the method's capabilities. + * @param this The data structure to fill with the method's capabilities */ -void libgamma_w32_gdi_method_capabilities(libgamma_method_capabilities_t* restrict this) +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 support... */ - 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. */ + /* 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; + /* 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; + this->real = 1; # else - this->real = 0; + this->real = 0; # endif #else - /* It is real and not fake if we are running on Windows. */ - this->fake = 0; - this->real = 1; + /* 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; + /* Gamma ramp adjustments are persistent */ + this->auto_restore = 0; } /** - * Initialise an allocated site state. + * Initialise an allocated site state * - * @param this The site state to initialise. + * @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 @@ -100,266 +84,277 @@ void libgamma_w32_gdi_method_capabilities(libgamma_method_capabilities_t* restri * 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. + * error identifier provided by this library */ -int libgamma_w32_gdi_site_initialise(libgamma_site_state_t* restrict this, - char* restrict site) +int +libgamma_w32_gdi_site_initialise(libgamma_site_state_t *restrict this, char* restrict site) { - this->partitions_available = 1; - return site != NULL ? LIBGAMMA_NO_SUCH_SITE : 0; + this->partitions_available = 1; + return !site ? 0 : LIBGAMMA_NO_SUCH_SITE; } /** - * Release all resources held by a site state. + * Release all resources held by a site state * - * @param this The site state. + * @param this The site state */ -void libgamma_w32_gdi_site_destroy(libgamma_site_state_t* restrict this) +void +libgamma_w32_gdi_site_destroy(libgamma_site_state_t *restrict this) { - (void) this; + (void) this; } /** - * Restore the gamma ramps all CRTC:s with a site to the system settings. + * Restore the gamma ramps all CRTC:s with a site to the system settings * - * @param this The site state. + * @param this The site state * @return Zero on success, otherwise (negative) the value of an - * error identifier provided by this library. + * error identifier provided by this library */ -int libgamma_w32_gdi_site_restore(libgamma_site_state_t* restrict this) +int +libgamma_w32_gdi_site_restore(libgamma_site_state_t *restrict this) { - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; + (void) this; + errno = ENOTSUP; + return LIBGAMMA_ERRNO_SET; } /** - * Initialise an allocated partition state. + * 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. + * @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. + * 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) +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 != 0) - 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++, n == 0) - return LIBGAMMA_IMPOSSIBLE_AMOUNT; - this->crtcs_available = (size_t)n; - return 0; + 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. + * Release all resources held by a partition state * - * @param this The partition state. + * @param this The partition state */ -void libgamma_w32_gdi_partition_destroy(libgamma_partition_state_t* restrict this) +void +libgamma_w32_gdi_partition_destroy(libgamma_partition_state_t *restrict this) { - (void) this; + (void) this; } /** - * Restore the gamma ramps all CRTC:s with a partition to the system settings. + * Restore the gamma ramps all CRTC:s with a partition to the system settings * - * @param this The partition state. + * @param this The partition state * @return Zero on success, otherwise (negative) the value of an - * error identifier provided by this library. + * error identifier provided by this library */ -int libgamma_w32_gdi_partition_restore(libgamma_partition_state_t* restrict this) +int +libgamma_w32_gdi_partition_restore(libgamma_partition_state_t *restrict this) { - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; + (void) this; + errno = ENOTSUP; + return LIBGAMMA_ERRNO_SET; } /** - * Initialise an allocated CRTC state. + * 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. + * @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. + * 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) +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 == NULL) - return LIBGAMMA_OPEN_CRTC_FAILED; - this->data = context; - return 0; + 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. + * Release all resources held by a CRTC state * - * @param this The CRTC state. + * @param this The CRTC state */ -void libgamma_w32_gdi_crtc_destroy(libgamma_crtc_state_t* restrict this) +void +libgamma_w32_gdi_crtc_destroy(libgamma_crtc_state_t *restrict this) { - if (this->data) - ReleaseDC(NULL, this->data); + if (this->data) + ReleaseDC(NULL, this->data); } /** - * Restore the gamma ramps for a CRTC to the system settings for that CRTC. + * Restore the gamma ramps for a CRTC to the system settings for that CRTC * - * @param this The CRTC state. + * @param this The CRTC state * @return Zero on success, otherwise (negative) the value of an - * error identifier provided by this library. + * error identifier provided by this library */ -int libgamma_w32_gdi_crtc_restore(libgamma_crtc_state_t* restrict this) +int +libgamma_w32_gdi_crtc_restore(libgamma_crtc_state_t *restrict this) { - (void) this; - return errno = ENOTSUP, LIBGAMMA_ERRNO_SET; + (void) this; + errno = ENOTSUP; + return LIBGAMMA_ERRNO_SET; } /** - * Read information about a CRTC. + * 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 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`. + * @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) +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; - +#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 +#undef KNOWN_FIELDS } /** - * Get the current gamma ramps for a CRTC, 16-bit gamma-depth version. + * 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. + * @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. + * 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) +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; + /* 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; + /* 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. + * Set the gamma ramps for a CRTC, 16-bit gamma-depth version * - * @param this The CRTC state. - * @param ramps The gamma ramps to apply. + * @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. + * 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) +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; + /* 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; + /* Apply gamma ramps */ + if (!SetDeviceGammaRamp(this->data, ramps.red)) + return LIBGAMMA_GAMMA_RAMP_WRITE_FAILED; + return 0; } - |