[PATCH weston] screenshot: Use correct buffer size for transformed outputs.

[Scott Moreau]

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.
---
 clients/screenshot.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/clients/screenshot.c b/clients/screenshot.c
index 7395bf3..0fa4e4b 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);
-- 
1.7.11.2