Fix buffer blit matrices

There was a missing wlr_matrix_scale call, so we ended up with black
frames.

Closes: https://github.com/swaywm/wlroots/issues/2780

2 files changed, 2 insertions, 0 deletions

diff --git a/backend/drm/renderer.c b/backend/drm/renderer.c
index 260d041f..2793c00b 100644
--- a/backend/drm/renderer.c
+++ b/backend/drm/renderer.c
@@ -157,6 +157,7 @@ static struct wlr_buffer *drm_surface_blit(struct wlr_drm_surface *surf,
 
 	float mat[9];
 	wlr_matrix_identity(mat);
+	wlr_matrix_scale(mat, surf->width, surf->height);
 
 	wlr_renderer_begin(renderer, surf->width, surf->height);
 	wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 0.0 });
diff --git a/types/wlr_screencopy_v1.c b/types/wlr_screencopy_v1.c
index 9de3172c..87f3127f 100644
--- a/types/wlr_screencopy_v1.c
+++ b/types/wlr_screencopy_v1.c
@@ -287,6 +287,7 @@ static bool blit_dmabuf(struct wlr_renderer *renderer,
 
 	float mat[9];
 	wlr_matrix_identity(mat);
+	wlr_matrix_scale(mat, dst_buffer->width, dst_buffer->height);
 
 	wlr_renderer_begin(renderer, dst_buffer->width, dst_buffer->height);
 	wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 0.0 });