diff options
| -rw-r--r-- | src/fake_quartz.c | 220 | ||||
| -rw-r--r-- | src/fake_quartz.h | 10 |
2 files changed, 229 insertions, 1 deletions
diff --git a/src/fake_quartz.c b/src/fake_quartz.c new file mode 100644 index 0000000..92f75df --- /dev/null +++ b/src/fake_quartz.c @@ -0,0 +1,220 @@ +/** + * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) + * + * This program 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 program 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 program. If not, see <http://www.gnu.org/licenses/>. + */ +#include "fake_quartz.h" + + +#include <stdio.h> +#include <stdlib.h> + +#include <xcb/xcb.h> +#include <xcb/randr.h> + + +/* This file very sloppily translates Mac OS X Quartz calls to X RandR calls. + It should by no means be used, without additional modification, as a + part of a compatibility layer. The purpose of this file is only to make + it possible to test for logical errors in Max OS X specific code on + a GNU/Linux system under X. */ + + +static xcb_connection_t* conn = NULL; +static xcb_randr_get_screen_resources_current_reply_t* res_reply = NULL; +static uint32_t crtc_count = 0; +static xcb_randr_crtc_t* crtcs = NULL; +static uint16_t* original_ramps = NULL; + + +CGError CGGetOnlineDisplayList(uint32_t max_size, CGDirectDisplayID* displays_out, uint32_t* count_out) +{ + uint32_t i; + + if (conn == NULL) + { + xcb_generic_error_t* error; + xcb_screen_iterator_t iter; + xcb_randr_get_screen_resources_current_cookie_t res_cookie; + xcb_randr_get_crtc_gamma_cookie_t gamma_cookie; + xcb_randr_get_crtc_gamma_reply_t* gamma_reply; + + conn = xcb_connect(NULL, NULL); + + iter = xcb_setup_roots_iterator(xcb_get_setup(conn)); + res_cookie = xcb_randr_get_screen_resources_current(conn, iter.data->root); + res_reply = xcb_randr_get_screen_resources_current_reply(conn, res_cookie, &error); + + if (error) + { + fprintf(stderr, "Failed to open X connection\n"); + xcb_disconnect(conn); + crtc_count = 0; + return ~kCGErrorSuccess; + } + + crtc_count = (uint32_t)(res_reply->num_crtcs); + crtcs = xcb_randr_get_screen_resources_current_crtcs(res_reply); + + original_ramps = malloc(crtc_count * 3 * 256 * sizeof(uint16_t)); + if (original_ramps == NULL) + { + perror("malloc"); + xcb_disconnect(conn); + crtc_count = 0; + return ~kCGErrorSuccess; + } + + for (i = 0; i < crtc_count; i++) + { + gamma_cookie = xcb_randr_get_crtc_gamma(conn, crtcs[i]); + gamma_reply = xcb_randr_get_crtc_gamma_reply(conn, gamma_cookie, &error); + + if (error) + { + fprintf(stderr, "Failed to read gamma ramps\n"); + xcb_disconnect(conn); + crtc_count = 0; + return ~kCGErrorSuccess; + } + + memcpy(original_ramps + (0 + 3 * i) * 256, xcb_randr_get_crtc_gamma_red(gamma_reply), 256); + memcpy(original_ramps + (1 + 3 * i) * 256, xcb_randr_get_crtc_gamma_green(gamma_reply), 256); + memcpy(original_ramps + (2 + 3 * i) * 256, xcb_randr_get_crtc_gamma_blue(gamma_reply), 256); + + free(gamma_reply); + } + } + + for (i = 0; (i < max_size) && (i < crtc_count); i++) + *(displays_out + i) = (CGDirectDisplayID)i; + + *count_out = i; + return kCGErrorSuccess; +} + + +CGError CGSetDisplayTransferByTable(CGDirectDisplayID display, uint32_t gamma_size, const CGGammaValue* red, + const CGGammaValue* green, const CGGammaValue* blue) +{ + xcb_void_cookie_t gamma_cookie; + uint16_t r_int[256]; + uint16_t g_int[256]; + uint16_t b_int[256]; + long i; + int32_t v; + + if (gamma_size != 256) + { + fprintf(stderr, "Gamma size should be 256\n"); + abort(); + } + + for (i = 0; i < 256; i++) + { + v = red[i] * (UINT16_MAX - 1); + r_int[i] = v < 0 ? 0 : v >= UINT16_MAX : (UINT16_MAX - 1) : v; + + v = green[i] * (UINT16_MAX - 1); + g_int[i] = v < 0 ? 0 : v >= UINT16_MAX : (UINT16_MAX - 1) : v; + + v = blue[i] * (UINT16_MAX - 1); + b_int[i] = v < 0 ? 0 : v >= UINT16_MAX : (UINT16_MAX - 1) : v; + } + + gamma_cookie = xcb_randr_set_crtc_gamma_checked(conn, crtcs[display], gamma_size, r_int, g_int, b_int); + return xcb_request_check(conn, gamma_cookie) == NULL ? kCGErrorSuccess : ~kCGErrorSuccess; +} + + +CGError CGGetDisplayTransferByTable(CGDirectDisplayID display, uint32_t gamma_size, CGGammaValue* red, + CGGammaValue* green, CGGammaValue* blue, uint32_t *gamma_size_out) +{ + xcb_randr_get_crtc_gamma_cookie_t gamma_cookie; + xcb_randr_get_crtc_gamma_reply_t* gamma_reply; + xcb_generic_error_t* error; + uint16_t* r_int; + uint16_t* g_int; + uint16_t* b_int; + + if (gamma_size != 256) + { + fprintf(stderr, "Gamma size should be 256\n"); + abort(); + } + + *gamma_size_out = 256; + + gamma_cookie = xcb_randr_get_crtc_gamma(conn, crtcs[i]); + gamma_reply = xcb_randr_get_crtc_gamma_reply(conn, gamma_cookie, &error); + + if (error) + { + fprintf(stderr, "Failed to write gamma ramps\n"); + return ~kCGErrorSuccess; + } + + r_int = xcb_randr_get_crtc_gamma_red(gamma_reply); + g_int = xcb_randr_get_crtc_gamma_green(gamma_reply); + b_int = xcb_randr_get_crtc_gamma_blue(gamma_reply); + + for (i = 0; i < 256; i++) + { + red[i] = (CGGammaValue)(r_int[i]) / (UINT16_MAX - 1); + green[i] = (CGGammaValue)(g_int[i]) / (UINT16_MAX - 1); + blue[i] = (CGGammaValue)(b_int[i]) / (UINT16_MAX - 1); + } + + return kCGErrorSuccess; +} + + +void CGDisplayRestoreColorSyncSettings(void) +{ + uint32_t i; + for (i = 0; i < crtc_count; i++) + { + xcb_randr_set_crtc_gamma(conn, crtcs[i], 255, + original_ramps + (0 + 3 * i) * 256, + original_ramps + (1 + 3 * i) * 256, + original_ramps + (2 + 3 * i) * 256); + } +} + + +uint32_t CGDisplayGammaTableCapacity(CGDirectDisplayID display) +{ + return 256; +} + + +void close_fake_quartz(void) +{ + if (res_reply != NULL) + { + free(res_reply); + res_reply = NULL; + } + if (conn != NULL) + { + xcb_disconnect(conn); + conn = NULL; + } + if (original_ramps != NULL) + { + free(original_ramps); + original_ramps = NULL; + } +} + diff --git a/src/fake_quartz.h b/src/fake_quartz.h index dc13b81..24935e8 100644 --- a/src/fake_quartz.h +++ b/src/fake_quartz.h @@ -41,7 +41,7 @@ typedef float CGGammaValue; typedef uint32_t CGDirectDisplayID; -CGError CGGetActiveDisplayList(uint32_t max_size, CGDirectDisplayID* displays_out, uint32_t* count_out); +CGError CGGetOnlineDisplayList(uint32_t max_size, CGDirectDisplayID* displays_out, uint32_t* count_out); CGError CGSetDisplayTransferByTable(CGDirectDisplayID display, uint32_t gamma_size, const CGGammaValue* red, const CGGammaValue* green, const CGGammaValue* blue); @@ -54,5 +54,13 @@ void CGDisplayRestoreColorSyncSettings(void); uint32_t CGDisplayGammaTableCapacity(CGDirectDisplayID display); +/* The follow part most only be used when this module is used, + it cannot be used when the real CoreGraphics is used. + CoreGraphics does not have this function, it is added so + that there is a way to cleanly close the X connection + and free resources needed by this module. */ +void close_fake_quartz(void); + + #endif |