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-rw-r--r--src/lib/fake-w32-gdi.c67
1 files changed, 45 insertions, 22 deletions
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;
}