---
libavdevice/gdigrab.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/libavdevice/gdigrab.c b/libavdevice/gdigrab.c
index f4444406fa..b09c88d94d 100644
--- a/libavdevice/gdigrab.c
+++ b/libavdevice/gdigrab.c
@@ -52,6 +52,7 @@ struct gdigrab {
int height; /**< Height of the grab frame (private option) */
int offset_x; /**< Capture x offset (private option) */
int offset_y; /**< Capture y offset (private option) */
+ int client_only; /**< Discard decorations, such as titlebar
(private option) */
HWND hwnd; /**< Handle of the window for the grab */
HDC source_hdc; /**< Source device context */
@@ -212,6 +213,20 @@ gdigrab_region_wnd_update(AVFormatContext *s1, struct
gdigrab *gdigrab)
}
}
+/**
+ * Fetch titlebar height from handle.
+ *
+ * @param hwnd Handle of the window.
+ * @return titlebar height
+ */
+static int
+calc_titlebar_height(HWND hwnd) {
+ TITLEBARINFOEX tinfo;
+ tinfo.cbSize = sizeof(tinfo);
+ SendMessage(hwnd, WM_GETTITLEBARINFOEX, 0, (LPARAM)&tinfo);
+ return tinfo.rcTitleBar.bottom - tinfo.rcTitleBar.top;
+}
+
/**
* Initializes the gdi grab device demuxer (public device demuxer API).
*
@@ -284,6 +299,15 @@ gdigrab_read_header(AVFormatContext *s1)
if (hwnd) {
GetClientRect(hwnd, &virtual_rect);
+ if (gdigrab->client_only) {
+ int cxborder = GetSystemMetrics(SM_CXBORDER);
+ int cyborder = GetSystemMetrics(SM_CYBORDER);
+ int titlebar_height = calc_titlebar_height(hwnd);
+ virtual_rect.left += cxborder;
+ virtual_rect.right += -cxborder;
+ virtual_rect.top += cxborder + titlebar_height;
+ virtual_rect.bottom += -cyborder;
+ }
/* window -- get the right height and width for scaling DPI */
virtual_rect.left = virtual_rect.left * desktophorzres / horzres;
virtual_rect.right = virtual_rect.right * desktophorzres / horzres;
@@ -639,6 +663,7 @@ static const AVOption options[] = {
{ "video_size", "set video frame size", OFFSET(width),
AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
{ "offset_x", "capture area x offset", OFFSET(offset_x), AV_OPT_TYPE_INT,
{.i64 = 0}, INT_MIN, INT_MAX, DEC },
{ "offset_y", "capture area y offset", OFFSET(offset_y), AV_OPT_TYPE_INT,
{.i64 = 0}, INT_MIN, INT_MAX, DEC },
+ { "client_only", "client only", OFFSET(client_only), AV_OPT_TYPE_BOOL,
{.i64 = 0}, 0, 1, DEC },
{ NULL },
};
--
2.27.0.windows.1
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