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-rw-r--r--src/lib/fake-quartz-cg.c37
-rw-r--r--src/lib/fake-w32-gdi.c67
-rw-r--r--src/lib/libgamma-facade.c15
3 files changed, 88 insertions, 31 deletions
diff --git a/src/lib/fake-quartz-cg.c b/src/lib/fake-quartz-cg.c
index dbd06c7..1fcfaf3 100644
--- a/src/lib/fake-quartz-cg.c
+++ b/src/lib/fake-quartz-cg.c
@@ -156,6 +156,7 @@ CGError CGGetOnlineDisplayList(uint32_t max_size,
{
uint32_t i;
+ /* Connect to the display and get screen data if not already done so. */
if (connection == NULL)
{
xcb_generic_error_t* error;
@@ -164,12 +165,13 @@ CGError CGGetOnlineDisplayList(uint32_t max_size,
xcb_randr_get_crtc_gamma_cookie_t gamma_cookie;
xcb_randr_get_crtc_gamma_reply_t* restrict gamma_reply;
+ /* Connect to the display. */
connection = xcb_connect(NULL, NULL);
-
+ /* Get the first screen. */
iter = xcb_setup_roots_iterator(xcb_get_setup(connection));
+ /* Get the resources of the screen. */
res_cookie = xcb_randr_get_screen_resources_current(connection, iter.data->root);
res_reply = xcb_randr_get_screen_resources_current_reply(connection, res_cookie, &error);
-
if (error)
{
fprintf(stderr, "Failed to open X connection.\n");
@@ -178,9 +180,19 @@ CGError CGGetOnlineDisplayList(uint32_t max_size,
return ~kCGErrorSuccess;
}
+ /* Get the number of CRTC:s. */
crtc_count = (uint32_t)(res_reply->num_crtcs);
+ /* Get the CRTC ID:s. */
crtcs = xcb_randr_get_screen_resources_current_crtcs(res_reply);
+ /* Allocate memory where we store the
+ gamma ramps as they looked when this
+ adjustment method was first used.
+ This is used to emulate the functionality
+ of `CGDisplayRestoreColorSyncSettings`
+ which restore the all gamma ramps on
+ the system to the system settnigs.
+ */
original_ramps = malloc(crtc_count * 3 * 256 * sizeof(uint16_t));
if (original_ramps == NULL)
{
@@ -190,11 +202,12 @@ CGError CGGetOnlineDisplayList(uint32_t max_size,
return ~kCGErrorSuccess;
}
+ /* Fill the gamma ramps we just allocated. */
for (i = 0; i < crtc_count; i++)
{
+ /* Read current gamma ramps. */
gamma_cookie = xcb_randr_get_crtc_gamma(connection, crtcs[i]);
gamma_reply = xcb_randr_get_crtc_gamma_reply(connection, gamma_cookie, &error);
-
if (error)
{
fprintf(stderr, "Failed to read gamma ramps.\n");
@@ -203,6 +216,7 @@ CGError CGGetOnlineDisplayList(uint32_t max_size,
return ~kCGErrorSuccess;
}
+ /* Copy over the gamma ramps to the memory area we have allocated. */
#define __DEST(C) original_ramps + (C + 3 * i) * 256
#define __SRC(C) xcb_randr_get_crtc_gamma_##C(gamma_reply)
memcpy(__DEST(0), __SRC(red), 256 * sizeof(uint16_t));
@@ -211,13 +225,16 @@ CGError CGGetOnlineDisplayList(uint32_t max_size,
#undef __SRC
#undef __DEST
+ /* Release resouces. */
free(gamma_reply);
}
}
+ /* Return CRTC ID:s. */
for (i = 0; (i < max_size) && (i < crtc_count); i++)
*(displays_out + i) = (CGDirectDisplayID)i;
+ /* Return the number of CRTC ID:s we returned. */
*count_out = i;
return kCGErrorSuccess;
}
@@ -233,26 +250,33 @@ CGError CGSetDisplayTransferByTable(CGDirectDisplayID display, uint32_t gamma_si
long i;
int32_t v;
+ /* This is a sloppy compatibility layer that assumes the gamma ramp size is 256. */
if (gamma_size != 256)
{
fprintf(stderr, "Gamma size should be 256.\n");
abort();
}
+ /* Translate the gamma ramps from float (CoreGraphics) to 16-bit unsigned integer (X RandR). */
for (i = 0; i < 256; i++)
{
+ /* Red channel. */
v = (int32_t)(red[i] * UINT16_MAX);
r_int[i] = (uint16_t)(v < 0 ? 0 : v > UINT16_MAX ? UINT16_MAX : v);
+ /* Green channel. */
v = (int32_t)(green[i] * UINT16_MAX);
g_int[i] = (uint16_t)(v < 0 ? 0 : v > UINT16_MAX ? UINT16_MAX : v);
+ /* Blue channel. */
v = (int32_t)(blue[i] * UINT16_MAX);
b_int[i] = (uint16_t)(v < 0 ? 0 : v > UINT16_MAX ? UINT16_MAX : v);
}
+ /* Apply gamma ramps. */
gamma_cookie = xcb_randr_set_crtc_gamma_checked(connection, crtcs[display],
(uint16_t)gamma_size, r_int, g_int, b_int);
+ /* Check for errors. */
return xcb_request_check(connection, gamma_cookie) == NULL ? kCGErrorSuccess : ~kCGErrorSuccess;
}
@@ -269,27 +293,32 @@ CGError CGGetDisplayTransferByTable(CGDirectDisplayID display, uint32_t gamma_si
uint16_t* restrict b_int;
long i;
+ /* This is a sloppy compatibility layer that assumes the gamma ramp size is 256. */
if (gamma_size != 256)
{
fprintf(stderr, "Gamma size should be 256.\n");
abort();
}
+ /* The gamma ramp size should be returned to the caller. */
*gamma_size_out = 256;
+ /* Read current gamma ramps. */
gamma_cookie = xcb_randr_get_crtc_gamma(connection, crtcs[display]);
gamma_reply = xcb_randr_get_crtc_gamma_reply(connection, gamma_cookie, &error);
-
if (error)
{
fprintf(stderr, "Failed to write gamma ramps.\n");
return ~kCGErrorSuccess;
}
+ /* Get gamma ramp values. */
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);
+ /* Translate gamma ramps to float format,
+ that is what CoreGraphics uses. */
for (i = 0; i < 256; i++)
{
red[i] = (CGGammaValue)(r_int[i]) / UINT16_MAX;
diff --git a/src/lib/fake-w32-gdi.c b/src/lib/fake-w32-gdi.c
index ba72dce..b2ca79b 100644
--- a/src/lib/fake-w32-gdi.c
+++ b/src/lib/fake-w32-gdi.c
@@ -262,42 +262,58 @@ HDC CreateDC(LPCTSTR restrict lpszDriver, LPCTSTR restrict lpszDevice,
(void) lpszOutput;
(void) lpInitData;
+ /* Check correctness of input. */
if (strcmp(lpszDriver, "DISPLAY"))
return NULL;
- if (dc_count == 0) {
- xcb_generic_error_t* error;
- xcb_screen_iterator_t iter;
- xcb_randr_get_screen_resources_current_cookie_t res_cookie;
-
- connection = xcb_connect(NULL, NULL);
-
- iter = xcb_setup_roots_iterator(xcb_get_setup(connection));
- res_cookie = xcb_randr_get_screen_resources_current(connection, iter.data->root);
- res_reply = xcb_randr_get_screen_resources_current_reply(connection, res_cookie, &error);
-
- if (error)
- {
- xcb_disconnect(connection);
- crtc_count = -1;
- return NULL;
- }
-
- crtc_count = res_reply->num_crtcs;
- crtcs = xcb_randr_get_screen_resources_current_crtcs(res_reply);
- }
+ /* Connect to the display and get screen data if not already done so. */
+ if (dc_count == 0)
+ {
+ xcb_generic_error_t* error;
+ xcb_screen_iterator_t iter;
+ xcb_randr_get_screen_resources_current_cookie_t res_cookie;
+
+ /* Connect to the display. */
+ connection = xcb_connect(NULL, NULL);
+ /* Get the first screen. */
+ iter = xcb_setup_roots_iterator(xcb_get_setup(connection));
+ /* Get the resources of the screen. */
+ res_cookie = xcb_randr_get_screen_resources_current(connection, iter.data->root);
+ res_reply = xcb_randr_get_screen_resources_current_reply(connection, res_cookie, &error);
+ if (error)
+ {
+ fprintf(stderr, "Failed to open X connection.\n");
+ xcb_disconnect(connection);
+ crtc_count = -1;
+ return NULL;
+ }
+
+ /* Get the number of CRTC:s. */
+ crtc_count = res_reply->num_crtcs;
+ /* Get the CRTC ID:s. */
+ crtcs = xcb_randr_get_screen_resources_current_crtcs(res_reply);
+ }
+ /* Was the index too high. */
if (crtc_index >= crtc_count)
{
+ /* Disconnect and release resouces and
+ mark that we do not know the number of
+ available CRTC:s if we have not opened
+ any monitors yet. */
if (dc_count == 0)
{
xcb_disconnect(connection);
+ free(res_reply);
+ res_reply = NULL
crtc_count = -1;
}
return NULL;
}
+ /* We have opened a new CRTC. */
dc_count++;
+ /* Return the ID of the CRTC. */
return crtcs + crtc_index;
}
@@ -311,29 +327,36 @@ BOOL EnumDisplayDevices(LPCTSTR restrict lpDevice, DWORD iDevNum,
{
size_t count = (size_t)crtc_count;
(void) dwFlags;
+ /* Check the correctness of the input. */
if (lpDevice != NULL)
{
fprintf(stderr, "lpDevice (argument 1) for EnumDisplayDevices should be NULL\n");
abort();
return FALSE;
}
+ /* Do we know how many CRTC:s are available? */
if (crtc_count < 0)
{
+ /* If not open the first CRTC so that will be figured out. */
if (GetDC(NULL) == NULL)
return FALSE;
- dc_count = 0;
count = (size_t)crtc_count;
+ /* Close the primary monitor that we just closed. */
ReleaseDC(NULL, NULL);
}
+ /* Check that the request CRTC exists. */
if (iDevNum >= count)
return FALSE;
+ /* Check the correctness of the input. */
if (lpDisplayDevice->cb != sizeof(DISPLAY_DEVICE))
{
fprintf(stderr, "lpDisplayDevice->cb for EnumDisplayDevices is not sizeof(DISPLAY_DEVICE)\n");
abort();
return FALSE;
}
+ /* Store name for the CRTC. */
sprintf(lpDisplayDevice->DeviceName, "%i", iDevNum);
+ /* The connector that the CRTC belongs to is enabled. */
lpDisplayDevice->StateFlags = DISPLAY_DEVICE_ACTIVE;
return TRUE;
}
diff --git a/src/lib/libgamma-facade.c b/src/lib/libgamma-facade.c
index 8d64514..65f0d38 100644
--- a/src/lib/libgamma-facade.c
+++ b/src/lib/libgamma-facade.c
@@ -122,12 +122,14 @@ static int libgamma_list_method_test(int method, int operation)
switch (operation)
{
- case 0: /* Methods that the environment suggests will work, excluding fake. */
+ case 0:
+ /* Methods that the environment suggests will work, excluding fake. */
if (caps.fake)
return 0;
/* Fall through. */
- case 1: /* Methods that the environment suggests will work, including fake. */
+ case 1:
+ /* Methods that the environment suggests will work, including fake. */
if (caps.real == 0)
return 0;
#ifdef HAVE_LIBGAMMA_METHOD_LINUX_DRM
@@ -142,13 +144,16 @@ static int libgamma_list_method_test(int method, int operation)
#endif
return caps.default_site_known;
- case 2: /* All real non-fake methods. */
+ case 2:
+ /* All real non-fake methods. */
return caps.real && (caps.fake == 0);
- case 3: /* All real methods. */
+ case 3:
+ /* All real methods. */
return caps.real;
- default: /* All methods. */
+ default:
+ /* All methods. */
return 1;
}
}
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-12-12 17:01:22 +0000