screenshot: Use correct buffer size for transformed outputs.

This is a workaround for screenshots with transformed outputs. It reorders
the output positions so the correct buffer size is determined for the final
image. This assumes the outputs are in succession on the x axis. The outputs
are rendered in their transformed state.

1 files changed, 6 insertions, 0 deletions

diff --git a/clients/screenshot.c b/clients/screenshot.c
index 7395bf3f..0fa4e4b7 100644
--- a/clients/screenshot.c
+++ b/clients/screenshot.c
@@ -205,6 +205,12 @@ set_buffer_size(int *width, int *height)
 	struct screenshooter_output *output;
 	min_x = min_y = INT_MAX;
 	max_x = max_y = INT_MIN;
+	int position = 0;
+
+	wl_list_for_each_reverse(output, &output_list, link) {
+		output->offset_x = position;
+		position += output->width;
+	}
 
 	wl_list_for_each(output, &output_list, link) {
 		min_x = MIN(min_x, output->offset_x);