Consider scale factor when rendering views

include/rootston/config.h

@@ -8,6 +8,7 @@ struct output_config {
 	char *name;
 	enum wl_output_transform transform;
 	int x, y;
+	int scale;
 	struct wl_list link;
 	struct {
 		int width, height;

include/rootston/view.h

@@ -48,6 +48,7 @@ enum roots_view_type {
 
 struct roots_view {
 	struct roots_desktop *desktop;
+	struct roots_output *output;
 	double x, y;
 	float rotation;
 	// TODO: Something for roots-enforced width/height

include/wlr/types/wlr_surface.h

@@ -1,10 +1,10 @@
 #ifndef WLR_TYPES_WLR_SURFACE_H
 #define WLR_TYPES_WLR_SURFACE_H
-
 #include <wayland-server.h>
 #include <pixman.h>
 #include <stdint.h>
 #include <stdbool.h>
+#include <wlr/types/wlr_output.h>
 
 struct wlr_frame_callback {
 	struct wl_resource *resource;
@@ -135,4 +135,8 @@ struct wlr_surface *wlr_surface_get_main_surface(struct wlr_surface *surface);
  */
 struct wlr_subsurface *wlr_surface_subsurface_at(struct wlr_surface *surface,
 		double sx, double sy, double *sub_x, double *sub_y);
+
+void wlr_surface_send_enter(struct wlr_surface *surface,
+		struct wlr_output *output);
+
 #endif

rootston/config.c

@@ -220,6 +220,7 @@ static int config_ini_handler(void *user, const char *section, const char *name,
 			oc = calloc(1, sizeof(struct output_config));
 			oc->name = strdup(output_name);
 			oc->transform = WL_OUTPUT_TRANSFORM_NORMAL;
+			oc->scale = 1;
 			wl_list_insert(&config->outputs, &oc->link);
 		}
 
@@ -227,6 +228,9 @@ static int config_ini_handler(void *user, const char *section, const char *name,
 			oc->x = strtol(value, NULL, 10);
 		} else if (strcmp(name, "y") == 0) {
 			oc->y = strtol(value, NULL, 10);
+		} else if (strcmp(name, "scale") == 0) {
+			oc->scale = strtol(value, NULL, 10);
+			assert(oc->scale >= 1);
 		} else if (strcmp(name, "rotate") == 0) {
 			if (strcmp(value, "90") == 0) {
 				oc->transform = WL_OUTPUT_TRANSFORM_90;

rootston/output.c

@@ -27,6 +27,8 @@ static void render_surface(struct wlr_surface *surface,
 
 		if (wlr_output_layout_intersects(desktop->layout, wlr_output,
 				lx, ly, lx + width, ly + height)) {
+			// TODO: accomodate for mismatched scale, which can happen, for
+			// example, when a view is rendered over two outputs
 			float matrix[16];
 
 			float translate_origin[16];
@@ -217,6 +219,7 @@ void output_add_notify(struct wl_listener *listener, void *data) {
 		if (output_config->mode.width) {
 			set_mode(wlr_output, output_config);
 		}
+		wlr_output->scale = output_config->scale;
 		wlr_output_transform(wlr_output, output_config->transform);
 		wlr_output_layout_add(desktop->layout,
 				wlr_output, output_config->x, output_config->y);

types/wlr_output.c

@@ -29,8 +29,7 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 	if (version >= WL_OUTPUT_MODE_SINCE_VERSION) {
 		struct wlr_output_mode *mode;
 		wl_list_for_each(mode, &output->modes, link) {
-			// TODO: mode->flags should just be preferred
-			uint32_t flags = mode->flags;
+			uint32_t flags = mode->flags & ~WL_OUTPUT_MODE_PREFERRED;
 			if (output->current_mode == mode) {
 				flags |= WL_OUTPUT_MODE_CURRENT;
 			}
@@ -45,6 +44,7 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 		}
 	}
 	if (version >= WL_OUTPUT_SCALE_SINCE_VERSION) {
+		wlr_log(L_DEBUG, "Sending scale");
 		wl_output_send_scale(resource, output->scale);
 	}
 	if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {

types/wlr_surface.c

@@ -649,14 +649,14 @@ void wlr_surface_get_matrix(struct wlr_surface *surface,
 		float (*matrix)[16],
 		const float (*projection)[16],
 		const float (*transform)[16]) {
-	int width = surface->texture->width / surface->current->scale;
-	int height = surface->texture->height / surface->current->scale;
+	int width = surface->texture->width;
+	int height = surface->texture->height;
 	float scale[16];
 	wlr_matrix_identity(matrix);
 	if (transform) {
 		wlr_matrix_mul(matrix, transform, matrix);
 	}
-	wlr_matrix_scale(&scale, width, height, 1);
+	wlr_matrix_scale(&scale, width, height, surface->current->scale);
 	wlr_matrix_mul(matrix, &scale, matrix);
 	wlr_matrix_mul(projection, matrix, matrix);
 }
@@ -894,3 +894,16 @@ struct wlr_subsurface *wlr_surface_subsurface_at(struct wlr_surface *surface,
 
 	return NULL;
 }
+
+void wlr_surface_send_enter(struct wlr_surface *surface,
+		struct wlr_output *output) {
+	struct wl_client *client = wl_resource_get_client(surface->resource);
+	struct wl_resource *resource;
+	wl_resource_for_each(resource, &output->wl_resources) {
+		if (client == wl_resource_get_client(resource)) {
+			wlr_log(L_DEBUG, "sending output enter");
+			wl_surface_send_enter(surface->resource, resource);
+			break;
+		}
+	}
+}