diff options
| -rw-r--r-- | wlr_scene.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/wlr_scene.c b/wlr_scene.c index c0be855..4754b0e 100644 --- a/wlr_scene.c +++ b/wlr_scene.c @@ -620,7 +620,7 @@ void wlr_scene_buffer_set_buffer_with_damage(struct wlr_scene_buffer *scene_buff wlr_fbox_transform(&box, &box, scene_buffer->transform, buffer->width, buffer->height); - double scale_x, scale_y; + float scale_x, scale_y; if (scene_buffer->dst_width || scene_buffer->dst_height) { scale_x = scene_buffer->dst_width / box.width; scale_y = scene_buffer->dst_height / box.height; @@ -641,10 +641,24 @@ void wlr_scene_buffer_set_buffer_with_damage(struct wlr_scene_buffer *scene_buff struct wlr_scene_output *scene_output; wl_list_for_each(scene_output, &scene->outputs, link) { float output_scale = scene_output->output->scale; + float output_scale_x = output_scale * scale_x; + float output_scale_y = output_scale * scale_y; pixman_region32_t output_damage; pixman_region32_init(&output_damage); wlr_region_scale_xy(&output_damage, &trans_damage, - output_scale * scale_x, output_scale * scale_y); + output_scale_x, output_scale_y); + + // One buffer pixel will match (output_scale_x)x(output_scale_y) output + // pixels. If max(output_scale_x, output_scale_y) is bigger than 1, + // the result will be blurry, and with linear filtering, will bleed into + // adjacent (output_scale_x / 2) pixels on X axis and (output_scale_y / 2) + // pixels on Y axis. To fix this, the damage region is expanded by largest + // distance of the two. + float bigger_scale = fmaxf(output_scale_x, output_scale_y); + if (bigger_scale > 1.0f) { + wlr_region_expand(&output_damage, &output_damage, + ceilf(bigger_scale / 2.0f)); + } pixman_region32_t cull_region; pixman_region32_init(&cull_region); @@ -653,11 +667,6 @@ void wlr_scene_buffer_set_buffer_with_damage(struct wlr_scene_buffer *scene_buff pixman_region32_intersect(&output_damage, &output_damage, &cull_region); pixman_region32_fini(&cull_region); - // if we are using fractional scaling add a 1px margin. - if (floor(output_scale) != output_scale) { - wlr_region_expand(&output_damage, &output_damage, 1); - } - pixman_region32_translate(&output_damage, (lx - scene_output->x) * output_scale, (ly - scene_output->y) * output_scale); |