Fix various rebase-related bugs

2 files changed, 239 insertions, 199 deletions

diff --git a/rootston/desktop.c b/rootston/desktop.c
index f7f12eff..a724a40c 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -127,19 +127,21 @@ bool view_center(struct roots_view *view) {
 	int width, height;
 	wlr_output_effective_resolution(output, &width, &height);
 
-	double view_x = (double)(width - size.width) / 2 + l_output->x;
-	double view_y = (double)(height - size.height) / 2 + l_output->y;
+	double view_x = (double)(width - box.width) / 2 + l_output->x;
+	double view_y = (double)(height - box.height) / 2 + l_output->y;
 	view_set_position(view, view_x, view_y);
 
 	return true;
 }
 
-void view_initialize(struct roots_view *view) {
+void view_setup(struct roots_view *view) {
 	struct roots_input *input = view->desktop->server->input;
 	view_center(view);
 	set_view_focus(input, view->desktop, view);
 	wlr_seat_keyboard_notify_enter(input->wl_seat, view->wlr_surface);
-	view_update_output(view);
+	struct wlr_box before;
+	view_get_size(view, &before);
+	view_update_output(view, &before);
 }
 
 void view_teardown(struct roots_view *view) {
diff --git a/types/wlr_output.c b/types/wlr_output.c
index 7a56eab6..44d24ae3 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -5,6 +5,7 @@
 #include <tgmath.h>
 #include <time.h>
 #include <wayland-server.h>
+#include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_surface.h>
 #include <wlr/interfaces/wlr_output.h>
@@ -28,7 +29,8 @@ 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) {
-			uint32_t flags = mode->flags & WL_OUTPUT_MODE_PREFERRED;
+			// TODO: mode->flags should just be preferred
+			uint32_t flags = mode->flags;
 			if (output->current_mode == mode) {
 				flags |= WL_OUTPUT_MODE_CURRENT;
 			}
@@ -134,7 +136,9 @@ static void wlr_output_update_matrix(struct wlr_output *output) {
 }
 
 void wlr_output_enable(struct wlr_output *output, bool enable) {
-	output->impl->enable(output, enable);
+	if (output->impl->enable) {
+		output->impl->enable(output, enable);
+	}
 }
 
 bool wlr_output_set_mode(struct wlr_output *output,
@@ -187,94 +191,199 @@ void wlr_output_set_position(struct wlr_output *output, int32_t lx,
 	}
 }
 
-static bool set_cursor(struct wlr_output *output, const uint8_t *buf,
-		int32_t stride, uint32_t width, uint32_t height, int32_t hotspot_x,
-		int32_t hotspot_y) {
-	if (output->impl->set_cursor
-			&& output->impl->set_cursor(output, buf, stride, width, height,
-				hotspot_x, hotspot_y, true)) {
-		output->cursor.is_sw = false;
-		return true;
+void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
+		const struct wlr_output_impl *impl) {
+	assert(impl->make_current && impl->swap_buffers && impl->transform);
+	output->backend = backend;
+	output->impl = impl;
+	wl_list_init(&output->modes);
+	output->transform = WL_OUTPUT_TRANSFORM_NORMAL;
+	output->scale = 1;
+	wl_list_init(&output->cursors);
+	wl_signal_init(&output->events.frame);
+	wl_signal_init(&output->events.swap_buffers);
+	wl_signal_init(&output->events.resolution);
+	wl_signal_init(&output->events.destroy);
+}
+
+void wlr_output_destroy(struct wlr_output *output) {
+	if (!output) {
+		return;
 	}
 
-	wlr_log(L_INFO, "Falling back to software cursor");
+	wl_signal_emit(&output->events.destroy, output);
 
-	output->cursor.is_sw = true;
-	output->cursor.width = width;
-	output->cursor.height = height;
+	struct wlr_output_mode *mode, *tmp_mode;
+	wl_list_for_each_safe(mode, tmp_mode, &output->modes, link) {
+		free(mode);
+	}
+	wl_list_remove(&output->modes);
+	if (output->impl && output->impl->destroy) {
+		output->impl->destroy(output);
+	} else {
+		free(output);
+	}
+}
 
-	if (!output->cursor.renderer) {
-		output->cursor.renderer = wlr_gles2_renderer_create(output->backend);
-		if (!output->cursor.renderer) {
-			return false;
-		}
+void wlr_output_effective_resolution(struct wlr_output *output,
+		int *width, int *height) {
+	// TODO: Scale factor
+	if (output->transform % 2 == 1) {
+		*width = output->height;
+		*height = output->width;
+	} else {
+		*width = output->width;
+		*height = output->height;
 	}
+}
 
-	if (!output->cursor.texture) {
-		output->cursor.texture =
-			wlr_render_texture_create(output->cursor.renderer);
-		if (!output->cursor.texture) {
-			return false;
+void wlr_output_make_current(struct wlr_output *output) {
+	output->impl->make_current(output);
+}
+
+static void output_cursor_get_box(struct wlr_output_cursor *cursor,
+		struct wlr_box *box) {
+	box->x = cursor->x - cursor->hotspot_x;
+	box->y = cursor->y - cursor->hotspot_y;
+	box->width = cursor->width;
+	box->height = cursor->height;
+}
+
+static void output_cursor_render(struct wlr_output_cursor *cursor) {
+	struct wlr_texture *texture = cursor->texture;
+	struct wlr_renderer *renderer = cursor->renderer;
+	if (cursor->surface != NULL) {
+		// Some clients commit a cursor surface with a NULL buffer to hide it.
+		if (!wlr_surface_has_buffer(cursor->surface)) {
+			return;
 		}
+		texture = cursor->surface->texture;
+		renderer = cursor->surface->renderer;
 	}
 
-	return wlr_texture_upload_pixels(output->cursor.texture,
-		WL_SHM_FORMAT_ARGB8888, stride, width, height, buf);
+	if (texture == NULL || renderer == NULL) {
+		return;
+	}
+
+	struct wlr_box output_box;
+	output_box.x = output_box.y = 0;
+	output_box.width = cursor->output->width;
+	output_box.height = cursor->output->height;
+
+	struct wlr_box cursor_box;
+	output_cursor_get_box(cursor, &cursor_box);
+
+	struct wlr_box intersection;
+	struct wlr_box *intersection_ptr = &intersection;
+	if (!wlr_box_intersection(&output_box, &cursor_box, &intersection_ptr)) {
+		return;
+	}
+
+	glViewport(0, 0, cursor->output->width, cursor->output->height);
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+	float matrix[16];
+	wlr_texture_get_matrix(texture, &matrix,
+		&cursor->output->transform_matrix, cursor->x - cursor->hotspot_x,
+		cursor->y - cursor->hotspot_y);
+	wlr_render_with_matrix(renderer, texture, &matrix);
 }
 
-bool wlr_output_set_cursor(struct wlr_output *output,
-		const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height,
-		int32_t hotspot_x, int32_t hotspot_y) {
-	if (output->cursor.surface) {
-		wl_list_remove(&output->cursor.surface_commit.link);
-		wl_list_remove(&output->cursor.surface_destroy.link);
-		output->cursor.surface = NULL;
+void wlr_output_swap_buffers(struct wlr_output *output) {
+	struct wlr_output_cursor *cursor;
+	wl_list_for_each(cursor, &output->cursors, link) {
+		if (output->hardware_cursor == cursor) {
+			continue;
+		}
+		output_cursor_render(cursor);
 	}
 
-	output->cursor.hotspot_x = hotspot_x;
-	output->cursor.hotspot_y = hotspot_y;
+	wl_signal_emit(&output->events.swap_buffers, &output);
 
-	return set_cursor(output, buf, stride, width, height, hotspot_x, hotspot_y);
+	output->impl->swap_buffers(output);
 }
 
-static inline int64_t timespec_to_msec(const struct timespec *a) {
-	return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
+void wlr_output_set_gamma(struct wlr_output *output,
+	uint32_t size, uint16_t *r, uint16_t *g, uint16_t *b) {
+	if (output->impl->set_gamma) {
+		output->impl->set_gamma(output, size, r, g, b);
+	}
 }
 
-static void commit_cursor_surface(struct wlr_output *output,
-		struct wlr_surface *surface) {
-	if (output->cursor.is_sw) {
-		return;
+uint32_t wlr_output_get_gamma_size(struct wlr_output *output) {
+	if (!output->impl->get_gamma_size) {
+		return 0;
 	}
+	return output->impl->get_gamma_size(output);
+}
 
-	struct wl_shm_buffer *buffer = wl_shm_buffer_get(surface->current->buffer);
-	if (buffer == NULL) {
-		return;
+static void output_cursor_reset(struct wlr_output_cursor *cursor) {
+	if (cursor->surface != NULL) {
+		wl_list_remove(&cursor->surface_commit.link);
+		wl_list_remove(&cursor->surface_destroy.link);
+		cursor->surface = NULL;
 	}
+}
 
-	uint32_t format = wl_shm_buffer_get_format(buffer);
-	if (format != WL_SHM_FORMAT_ARGB8888) {
-		return;
+bool wlr_output_cursor_set_image(struct wlr_output_cursor *cursor,
+		const uint8_t *pixels, int32_t stride, uint32_t width, uint32_t height,
+		int32_t hotspot_x, int32_t hotspot_y) {
+	output_cursor_reset(cursor);
+
+	cursor->width = width;
+	cursor->height = height;
+	cursor->hotspot_x = hotspot_x;
+	cursor->hotspot_y = hotspot_y;
+
+	if (cursor->output->hardware_cursor == NULL &&
+			cursor->output->impl->set_cursor) {
+		int ok = cursor->output->impl->set_cursor(cursor->output, pixels,
+			stride, width, height, hotspot_x, hotspot_y, true);
+		if (ok) {
+			cursor->output->hardware_cursor = cursor;
+			return true;
+		}
 	}
 
-	void *buffer_data = wl_shm_buffer_get_data(buffer);
-	int32_t width = wl_shm_buffer_get_width(buffer);
-	int32_t height = wl_shm_buffer_get_height(buffer);
-	int32_t stride = wl_shm_buffer_get_stride(buffer);
-	wl_shm_buffer_begin_access(buffer);
-	wlr_output_set_cursor(output, buffer_data, stride/4, width, height,
-		output->cursor.hotspot_x - surface->current->sx,
-		output->cursor.hotspot_y - surface->current->sy);
-	wl_shm_buffer_end_access(buffer);
+	wlr_log(L_INFO, "Falling back to software cursor");
+
+	if (cursor->renderer == NULL) {
+		cursor->renderer = wlr_gles2_renderer_create(cursor->output->backend);
+		if (cursor->renderer == NULL) {
+			return false;
+		}
+	}
+
+	if (cursor->texture == NULL) {
+		cursor->texture = wlr_render_texture_create(cursor->renderer);
+		if (cursor->texture == NULL) {
+			return false;
+		}
+	}
+
+	return wlr_texture_upload_pixels(cursor->texture, WL_SHM_FORMAT_ARGB8888,
+		stride, width, height, pixels);
 }
 
-static void handle_cursor_surface_commit(struct wl_listener *listener,
+static void output_cursor_commit(struct wlr_output_cursor *cursor) {
+	cursor->width = cursor->surface->current->width;
+	cursor->height = cursor->surface->current->height;
+
+	// TODO: if hardware cursor, upload pixels
+}
+
+static inline int64_t timespec_to_msec(const struct timespec *a) {
+	return (int64_t)a->tv_sec * 1000 + a->tv_nsec / 1000000;
+}
+
+static void output_cursor_handle_commit(struct wl_listener *listener,
 		void *data) {
-	struct wlr_output *output = wl_container_of(listener, output,
-		cursor.surface_commit);
+	struct wlr_output_cursor *cursor = wl_container_of(listener, cursor,
+		surface_commit);
 	struct wlr_surface *surface = data;
 
-	commit_cursor_surface(output, surface);
+	output_cursor_commit(cursor);
 
 	struct timespec now;
 	clock_gettime(CLOCK_MONOTONIC, &now);
@@ -287,178 +396,107 @@ static void handle_cursor_surface_commit(struct wl_listener *listener,
 	}
 }
 
-static void handle_cursor_surface_destroy(struct wl_listener *listener,
+static void output_cursor_handle_destroy(struct wl_listener *listener,
 		void *data) {
-	struct wlr_output *output = wl_container_of(listener, output,
-		cursor.surface_destroy);
-
-	wl_list_remove(&output->cursor.surface_commit.link);
-	wl_list_remove(&output->cursor.surface_destroy.link);
-	output->cursor.surface = NULL;
+	struct wlr_output_cursor *cursor = wl_container_of(listener, cursor,
+		surface_destroy);
+	output_cursor_reset(cursor);
 }
 
-void wlr_output_set_cursor_surface(struct wlr_output *output,
+void wlr_output_cursor_set_surface(struct wlr_output_cursor *cursor,
 		struct wlr_surface *surface, int32_t hotspot_x, int32_t hotspot_y) {
 	if (surface && strcmp(surface->role, "wl_pointer-cursor") != 0) {
 		return;
 	}
 
-	output->cursor.hotspot_x = hotspot_x;
-	output->cursor.hotspot_y = hotspot_y;
+	if (surface) {
+		cursor->width = surface->current->width;
+		cursor->height = surface->current->height;
+	}
+	cursor->hotspot_x = hotspot_x;
+	cursor->hotspot_y = hotspot_y;
 
-	if (surface && surface == output->cursor.surface) {
-		if (output->impl->set_cursor && !output->cursor.is_sw) {
-			// Only update the hotspot
-			output->impl->set_cursor(output, NULL, 0, 0, 0, hotspot_x,
-				hotspot_y, false);
+	if (surface && surface == cursor->surface) {
+		if (cursor->output->hardware_cursor == cursor &&
+				cursor->output->impl->set_cursor) {
+			// If the surface hasn't changed and it's an hardware cursor, only
+			// update the hotspot
+			cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0,
+				hotspot_x, hotspot_y, false);
 		}
 		return;
 	}
 
-	if (output->cursor.surface) {
-		wl_list_remove(&output->cursor.surface_commit.link);
-		wl_list_remove(&output->cursor.surface_destroy.link);
-		output->cursor.surface = NULL;
-	}
+	output_cursor_reset(cursor);
 
-	// Disable hardware cursor
+	// Disable hardware cursor for surfaces
 	// TODO: support hardware cursors
-	output->cursor.is_sw = true;
-	if (output->impl->set_cursor) {
-		output->impl->set_cursor(output, NULL, 0, 0, 0, hotspot_x, hotspot_y,
+	if (cursor->output->hardware_cursor == cursor &&
+			cursor->output->impl->set_cursor) {
+		cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0, 0, 0,
 			true);
+		cursor->output->hardware_cursor = NULL;
 	}
 
-	//output->cursor.is_sw = output->impl->set_cursor == NULL;
-	output->cursor.surface = surface;
+	cursor->surface = surface;
 
 	if (surface != NULL) {
-		wl_signal_add(&surface->events.commit, &output->cursor.surface_commit);
-		wl_signal_add(&surface->events.destroy,
-			&output->cursor.surface_destroy);
-		commit_cursor_surface(output, surface);
+		wl_signal_add(&surface->events.commit, &cursor->surface_commit);
+		wl_signal_add(&surface->events.destroy, &cursor->surface_destroy);
+		output_cursor_commit(cursor);
 	} else {
-		set_cursor(output, NULL, 0, 0, 0, hotspot_x, hotspot_y);
+		// TODO: if hardware cursor, disable cursor
 	}
 }
 
-bool wlr_output_move_cursor(struct wlr_output *output, int x, int y) {
-	output->cursor.x = x;
-	output->cursor.y = y;
+bool wlr_output_cursor_move(struct wlr_output_cursor *cursor, int x, int y) {
+	cursor->x = x;
+	cursor->y = y;
 
-	if (output->cursor.is_sw) {
+	if (cursor->output->hardware_cursor != cursor) {
 		return true;
 	}
 
-	if (!output->impl->move_cursor) {
+	if (!cursor->output->impl->move_cursor) {
 		return false;
 	}
-
-	return output->impl->move_cursor(output, x, y);
+	return cursor->output->impl->move_cursor(cursor->output, x, y);
 }
 
-void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
-		const struct wlr_output_impl *impl) {
-	output->backend = backend;
-	output->impl = impl;
-	wl_list_init(&output->modes);
-	output->transform = WL_OUTPUT_TRANSFORM_NORMAL;
-	output->scale = 1;
-	wl_signal_init(&output->events.frame);
-	wl_signal_init(&output->events.swap_buffers);
-	wl_signal_init(&output->events.resolution);
-	wl_signal_init(&output->events.destroy);
-
-	wl_list_init(&output->cursor.surface_commit.link);
-	output->cursor.surface_commit.notify = handle_cursor_surface_commit;
-	wl_list_init(&output->cursor.surface_destroy.link);
-	output->cursor.surface_destroy.notify = handle_cursor_surface_destroy;
+struct wlr_output_cursor *wlr_output_cursor_create(struct wlr_output *output) {
+	struct wlr_output_cursor *cursor =
+		calloc(1, sizeof(struct wlr_output_cursor));
+	if (cursor == NULL) {
+		return NULL;
+	}
+	cursor->output = output;
+	wl_list_init(&cursor->surface_commit.link);
+	cursor->surface_commit.notify = output_cursor_handle_commit;
+	wl_list_init(&cursor->surface_destroy.link);
+	cursor->surface_destroy.notify = output_cursor_handle_destroy;
+	wl_list_insert(&output->cursors, &cursor->link);
+	return cursor;
 }
 
-void wlr_output_destroy(struct wlr_output *output) {
-	if (!output) {
+void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor) {
+	if (cursor == NULL) {
 		return;
 	}
-
-	wl_signal_emit(&output->events.destroy, output);
-
-	wlr_texture_destroy(output->cursor.texture);
-	wlr_renderer_destroy(output->cursor.renderer);
-
-	struct wlr_output_mode *mode, *tmp_mode;
-	wl_list_for_each_safe(mode, tmp_mode, &output->modes, link) {
-		free(mode);
-	}
-	wl_list_remove(&output->modes);
-	if (output->impl && output->impl->destroy) {
-		output->impl->destroy(output);
-	} else {
-		free(output);
-	}
-}
-
-void wlr_output_effective_resolution(struct wlr_output *output,
-		int *width, int *height) {
-	if (output->transform % 2 == 1) {
-		*width = output->height;
-		*height = output->width;
-	} else {
-		*width = output->width;
-		*height = output->height;
-	}
-}
-
-void wlr_output_make_current(struct wlr_output *output) {
-	output->impl->make_current(output);
-}
-
-void wlr_output_swap_buffers(struct wlr_output *output) {
-	if (output->cursor.is_sw) {
-		glViewport(0, 0, output->width, output->height);
-		glEnable(GL_BLEND);
-		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
-		struct wlr_texture *texture = output->cursor.texture;
-		struct wlr_renderer *renderer = output->cursor.renderer;
-		if (output->cursor.surface) {
-			texture = output->cursor.surface->texture;
-			renderer = output->cursor.surface->renderer;
-		}
-
-		// We check texture->valid because some clients set a cursor surface
-		// with a NULL buffer to hide it
-		if (renderer && texture && texture->valid) {
-			float matrix[16];
-			if (output->cursor.surface) {
-				float translation[16];
-				wlr_matrix_translate(&translation,
-						output->cursor.x, output->cursor.y, 0);
-				wlr_surface_get_matrix(output->cursor.surface,
-						&matrix, &output->transform_matrix, &translation);
-			} else {
-				wlr_texture_get_matrix(texture,
-						&matrix, &output->transform_matrix,
-						output->cursor.x, output->cursor.y);
-			}
-			wlr_render_with_matrix(renderer, texture, &matrix);
+	output_cursor_reset(cursor);
+	if (cursor->output->hardware_cursor == cursor) {
+		// If this cursor was the hardware cursor, disable it
+		if (cursor->output->impl->set_cursor) {
+			cursor->output->impl->set_cursor(cursor->output, NULL, 0, 0, 0, 0,
+				0, true);
 		}
+		cursor->output->hardware_cursor = NULL;
 	}
-
-	wl_signal_emit(&output->events.swap_buffers, &output);
-
-	output->impl->swap_buffers(output);
-}
-
-void wlr_output_set_gamma(struct wlr_output *output,
-	uint32_t size, uint16_t *r, uint16_t *g, uint16_t *b) {
-	if (output->impl->set_gamma) {
-		output->impl->set_gamma(output, size, r, g, b);
+	if (cursor->texture != NULL) {
+		wlr_texture_destroy(cursor->texture);
 	}
-}
-
-uint32_t wlr_output_get_gamma_size(struct wlr_output *output) {
-	if (!output->impl->get_gamma_size) {
-		return 0;
+	if (cursor->renderer != NULL) {
+		wlr_renderer_destroy(cursor->renderer);
 	}
-	return output->impl->get_gamma_size(output);
+	wl_list_remove(&cursor->link);
+	free(cursor);
 }