From 13098a18eaa8e6edd56f7f8c508b030f91dae67e Mon Sep 17 00:00:00 2001
From: emersion <contact@emersion.fr>
Date: Wed, 9 May 2018 19:58:18 +0100
Subject: Fix hardware cursors scale & transform

---
 backend/drm/drm.c        | 19 ++++++++++++-------
 backend/wayland/output.c | 33 +++++++++++++++++++++++++--------
 2 files changed, 37 insertions(+), 15 deletions(-)

(limited to 'backend')

diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index e8ed7316..30be40ea 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -538,7 +538,8 @@ static void drm_connector_transform(struct wlr_output *output,
 }
 
 static bool drm_connector_set_cursor(struct wlr_output *output,
-		struct wlr_texture *texture, int32_t hotspot_x, int32_t hotspot_y,
+		struct wlr_texture *texture, int32_t scale,
+		enum wl_output_transform transform, int32_t hotspot_x, int32_t hotspot_y,
 		bool update_texture) {
 	struct wlr_drm_connector *conn = (struct wlr_drm_connector *)output;
 	struct wlr_drm_backend *drm = (struct wlr_drm_backend *)output->backend;
@@ -581,15 +582,12 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
 			return false;
 		}
 
-		enum wl_output_transform transform = output->transform;
 		wlr_matrix_projection(plane->matrix, plane->surf.width,
-			plane->surf.height, transform);
+			plane->surf.height, output->transform);
 	}
 
 	struct wlr_box hotspot = { .x = hotspot_x, .y = hotspot_y };
-	enum wl_output_transform transform =
-		wlr_output_transform_invert(output->transform);
-	wlr_box_transform(&hotspot, transform,
+	wlr_box_transform(&hotspot, wlr_output_transform_invert(output->transform),
 		plane->surf.width, plane->surf.height, &hotspot);
 
 	if (plane->cursor_hotspot_x != hotspot.x ||
@@ -617,6 +615,8 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
 	if (texture != NULL) {
 		int width, height;
 		wlr_texture_get_size(texture, &width, &height);
+		width = width * output->scale / scale;
+		height = height * output->scale / scale;
 
 		if (width > (int)plane->surf.width || height > (int)plane->surf.height) {
 			wlr_log(L_ERROR, "Cursor too large (max %dx%d)",
@@ -639,9 +639,14 @@ static bool drm_connector_set_cursor(struct wlr_output *output,
 
 		struct wlr_renderer *rend = plane->surf.renderer->wlr_rend;
 
+		struct wlr_box cursor_box = { .width = width, .height = height };
+
+		float matrix[9];
+		wlr_matrix_project_box(matrix, &cursor_box, transform, 0, plane->matrix);
+
 		wlr_renderer_begin(rend, plane->surf.width, plane->surf.height);
 		wlr_renderer_clear(rend, (float[]){ 0.0, 0.0, 0.0, 0.0 });
-		wlr_render_texture(rend, texture, plane->matrix, 0, 0, 1.0f);
+		wlr_render_texture_with_matrix(rend, texture, matrix, 1.0);
 		wlr_renderer_end(rend);
 
 		wlr_renderer_read_pixels(rend, WL_SHM_FORMAT_ARGB8888, bo_stride,
diff --git a/backend/wayland/output.c b/backend/wayland/output.c
index c498fc4e..109834c9 100644
--- a/backend/wayland/output.c
+++ b/backend/wayland/output.c
@@ -72,16 +72,20 @@ static void output_transform(struct wlr_output *_output,
 	output->wlr_output.transform = transform;
 }
 
-static bool output_set_cursor(struct wlr_output *_output,
-		struct wlr_texture *texture, int32_t hotspot_x, int32_t hotspot_y,
+static bool output_set_cursor(struct wlr_output *wlr_output,
+		struct wlr_texture *texture, int32_t scale,
+		enum wl_output_transform transform, int32_t hotspot_x, int32_t hotspot_y,
 		bool update_texture) {
-	struct wlr_wl_output *output =
-		(struct wlr_wl_output *)_output;
+	struct wlr_wl_output *output = (struct wlr_wl_output *)wlr_output;
 	struct wlr_wl_backend *backend = output->backend;
 
+	struct wlr_box hotspot = { .x = hotspot_x, .y = hotspot_y };
+	wlr_box_transform(&hotspot, wlr_output_transform_invert(wlr_output->transform),
+		output->cursor.width, output->cursor.height, &hotspot);
+
 	// TODO: use output->wlr_output.transform to transform pixels and hotpot
-	output->cursor.hotspot_x = hotspot_x;
-	output->cursor.hotspot_y = hotspot_y;
+	output->cursor.hotspot_x = hotspot.x;
+	output->cursor.hotspot_y = hotspot.y;
 
 	if (!update_texture) {
 		// Update hotspot without changing cursor image
@@ -98,6 +102,11 @@ static bool output_set_cursor(struct wlr_output *_output,
 	if (texture != NULL) {
 		int width, height;
 		wlr_texture_get_size(texture, &width, &height);
+		width = width * wlr_output->scale / scale;
+		height = height * wlr_output->scale / scale;
+
+		output->cursor.width = width;
+		output->cursor.height = height;
 
 		if (output->cursor.egl_window == NULL) {
 			output->cursor.egl_window =
@@ -110,12 +119,20 @@ static bool output_set_cursor(struct wlr_output *_output,
 
 		wlr_egl_make_current(&backend->egl, egl_surface, NULL);
 
+		struct wlr_box cursor_box = {
+			.width = width,
+			.height = height,
+		};
+
+		float projection[9];
+		wlr_matrix_projection(projection, width, height, wlr_output->transform);
+
 		float matrix[9];
-		wlr_matrix_projection(matrix, width, height, WL_OUTPUT_TRANSFORM_NORMAL);
+		wlr_matrix_project_box(matrix, &cursor_box, transform, 0, projection);
 
 		wlr_renderer_begin(backend->renderer, width, height);
 		wlr_renderer_clear(backend->renderer, (float[]){ 0.0, 0.0, 0.0, 0.0 });
-		wlr_render_texture(backend->renderer, texture, matrix, 0, 0, 1.0);
+		wlr_render_texture_with_matrix(backend->renderer, texture, matrix, 1.0);
 		wlr_renderer_end(backend->renderer);
 
 		wlr_egl_swap_buffers(&backend->egl, egl_surface, NULL);
-- 
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