Generalize output handling

4 files changed, 198 insertions, 211 deletions

diff --git a/backend/CMakeLists.txt b/backend/CMakeLists.txt
index 7183617c..fc1793cf 100644
--- a/backend/CMakeLists.txt
+++ b/backend/CMakeLists.txt
@@ -5,10 +5,10 @@ include_directories(
 )
 
 add_library(wlr-backend
-    wayland/backend.c
-    wayland/registry.c
-    wayland/wl_seat.c
-    wayland/wl_output.c
+    #wayland/backend.c
+    #wayland/registry.c
+    #wayland/wl_seat.c
+    #wayland/wl_output.c
     drm/backend.c
     drm/drm.c
     drm/udev.c
diff --git a/backend/backend.c b/backend/backend.c
index e40aaefe..753bb3ae 100644
--- a/backend/backend.c
+++ b/backend/backend.c
@@ -16,7 +16,6 @@ struct wlr_backend *wlr_backend_create(const struct wlr_backend_impl *impl,
 	backend->impl = impl;
 	wl_signal_init(&backend->events.output_add);
 	wl_signal_init(&backend->events.output_remove);
-	wl_signal_init(&backend->events.output_frame);
 	wl_signal_init(&backend->events.keyboard_add);
 	wl_signal_init(&backend->events.keyboard_remove);
 	wl_signal_init(&backend->events.pointer_add);
@@ -32,6 +31,6 @@ bool wlr_backend_init(struct wlr_backend *backend) {
 
 void wlr_backend_destroy(struct wlr_backend *backend) {
 	backend->impl->destroy(backend->state);
-	// TODO: Free anything else?
+	// TODO: free outputs
 	free(backend);
 }
diff --git a/backend/drm/backend.c b/backend/drm/backend.c
index 8c02669a..0da84745 100644
--- a/backend/drm/backend.c
+++ b/backend/drm/backend.c
@@ -19,18 +19,11 @@ static bool wlr_drm_backend_init(struct wlr_backend_state *state) {
 	return true;
 }
 
-static void free_output(void *item) {
-	struct wlr_drm_output *out = item;
-	wlr_drm_output_cleanup(out, true);
-	free(out);
-}
-
 static void wlr_drm_backend_destroy(struct wlr_backend_state *state) {
 	if (!state) {
 		return;
 	}
-	list_foreach(state->outputs, free_output);
-	list_free(state->outputs);
+	// TODO: free outputs in shared backend code
 	wlr_drm_renderer_free(&state->renderer);
 	wlr_udev_free(&state->udev);
 	wlr_session_close_file(state->session, state->fd);
@@ -86,6 +79,8 @@ struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
 		goto error_fd;
 	}
 
+	// TODO: what is the difference between the per-output renderer and this
+	// one?
 	if (!wlr_drm_renderer_init(&state->renderer, state->fd)) {
 		wlr_log(L_ERROR, "Failed to initialize renderer");
 		goto error_event;
diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index abb3fb26..5b186e41 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -13,6 +13,7 @@
 #include <GLES3/gl3.h>
 #include <wayland-server.h>
 
+#include "wayland.h"
 #include "backend.h"
 #include "backend/drm/backend.h"
 #include "backend/drm/drm.h"
@@ -39,7 +40,6 @@ static const char *conn_name[] = {
 };
 
 bool wlr_drm_renderer_init(struct wlr_drm_renderer *renderer, int fd) {
-
 	renderer->gbm = gbm_create_device(fd);
 	if (!renderer->gbm) {
 		wlr_log(L_ERROR, "Failed to create GBM device: %s", strerror(errno));
@@ -59,7 +59,6 @@ void wlr_drm_renderer_free(struct wlr_drm_renderer *renderer) {
 	if (!renderer) {
 		return;
 	}
-
 	wlr_egl_free(&renderer->egl);
 	gbm_device_destroy(renderer->gbm);
 }
@@ -95,79 +94,162 @@ static uint32_t get_fb_for_bo(int fd, struct gbm_bo *bo) {
 	return *id;
 }
 
-void wlr_drm_output_begin(struct wlr_drm_output *out) {
-	struct wlr_drm_renderer *renderer = out->renderer;
-	eglMakeCurrent(renderer->egl.display, out->egl, out->egl, renderer->egl.context);
+void wlr_drm_output_begin(struct wlr_output *output) {
+	struct wlr_output_state *_output = output->state;
+	struct wlr_drm_renderer *renderer = _output->renderer;
+	eglMakeCurrent(renderer->egl.display, _output->egl,
+			_output->egl, renderer->egl.context);
 }
 
-void wlr_drm_output_end(struct wlr_drm_output *out) {
-	struct wlr_drm_renderer *renderer = out->renderer;
-	eglSwapBuffers(renderer->egl.display, out->egl);
+void wlr_drm_output_end(struct wlr_output *output) {
+	struct wlr_output_state *_output = output->state;
+	struct wlr_drm_renderer *renderer = _output->renderer;
 
-	struct gbm_bo *bo = gbm_surface_lock_front_buffer(out->gbm);
+	eglSwapBuffers(renderer->egl.display, _output->egl);
+	struct gbm_bo *bo = gbm_surface_lock_front_buffer(_output->gbm);
 	uint32_t fb_id = get_fb_for_bo(renderer->fd, bo);
-
-	drmModePageFlip(renderer->fd, out->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, out);
-
-	gbm_surface_release_buffer(out->gbm, bo);
-
-	out->pageflip_pending = true;
+	drmModePageFlip(renderer->fd, _output->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, _output);
+	gbm_surface_release_buffer(_output->gbm, bo);
+	_output->pageflip_pending = true;
 }
 
 static bool display_init_renderer(struct wlr_drm_renderer *renderer,
-	struct wlr_drm_output *out) {
-
-	out->renderer = renderer;
-
-	out->gbm = gbm_surface_create(renderer->gbm, out->width, out->height,
-		GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
-	if (!out->gbm) {
-		wlr_log(L_ERROR, "Failed to create GBM surface for %s: %s", out->name,
+	struct wlr_output_state *output) {
+	struct wlr_output_mode *mode = output->wlr_output->current_mode;
+	output->renderer = renderer;
+	output->gbm = gbm_surface_create(renderer->gbm, mode->width,
+		mode->height, GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
+	if (!output->gbm) {
+		wlr_log(L_ERROR, "Failed to create GBM surface for %s: %s", output->name,
 			strerror(errno));
 		return false;
 	}
 
-	out->egl = wlr_egl_create_surface(&renderer->egl, out->gbm);
-	if (out->egl == EGL_NO_SURFACE) {
-		wlr_log(L_ERROR, "Failed to create EGL surface for %s", out->name);
+	output->egl = wlr_egl_create_surface(&renderer->egl, output->gbm);
+	if (output->egl == EGL_NO_SURFACE) {
+		wlr_log(L_ERROR, "Failed to create EGL surface for %s", output->name);
 		return false;
 	}
 
 	// Render black frame
+	eglMakeCurrent(renderer->egl.display, output->egl, output->egl, renderer->egl.context);
 
-	eglMakeCurrent(renderer->egl.display, out->egl, out->egl, renderer->egl.context);
-
-	glViewport(0, 0, out->width, out->height);
+	glViewport(0, 0, output->width, output->height);
 	glClearColor(0.0, 0.0, 0.0, 1.0);
 	glClear(GL_COLOR_BUFFER_BIT);
 
-	eglSwapBuffers(renderer->egl.display, out->egl);
+	eglSwapBuffers(renderer->egl.display, output->egl);
 
-	struct gbm_bo *bo = gbm_surface_lock_front_buffer(out->gbm);
+	struct gbm_bo *bo = gbm_surface_lock_front_buffer(output->gbm);
 	uint32_t fb_id = get_fb_for_bo(renderer->fd, bo);
 
-	drmModeSetCrtc(renderer->fd, out->crtc, fb_id, 0, 0,
-		       &out->connector, 1, &out->active_mode->mode);
-	drmModePageFlip(renderer->fd, out->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, out);
-
-	gbm_surface_release_buffer(out->gbm, bo);
+	drmModeSetCrtc(renderer->fd, output->crtc, fb_id, 0, 0,
+			&output->connector, 1, &mode->state->mode);
+	drmModePageFlip(renderer->fd, output->crtc, fb_id,
+			DRM_MODE_PAGE_FLIP_EVENT, output);
 
+	gbm_surface_release_buffer(output->gbm, bo);
 	return true;
 }
 
 static int find_id(const void *item, const void *cmp_to) {
-	const struct wlr_drm_output *out = item;
+	const struct wlr_output_state *output = item;
 	const uint32_t *id = cmp_to;
 
-	if (out->connector < *id) {
+	if (output->connector < *id) {
 		return -1;
-	} else if (out->connector > *id) {
+	} else if (output->connector > *id) {
 		return 1;
 	} else {
 		return 0;
 	}
 }
 
+static bool wlr_drm_output_set_mode(struct wlr_output_state *output,
+		struct wlr_output_mode *mode) {
+	struct wlr_backend_state *state =
+		wl_container_of(output->renderer, state, renderer);
+
+	wlr_log(L_INFO, "Modesetting '%s' with '%ux%u@%u mHz'", output->name,
+			mode->width, mode->height, mode->refresh);
+
+	drmModeConnector *conn = drmModeGetConnector(state->fd, output->connector);
+	if (!conn) {
+		wlr_log(L_ERROR, "Failed to get DRM connector");
+		goto error;
+	}
+
+	if (conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0) {
+		wlr_log(L_ERROR, "%s is not connected", output->name);
+		goto error;
+	}
+
+	drmModeRes *res = drmModeGetResources(state->fd);
+	if (!res) {
+		wlr_log(L_ERROR, "Failed to get DRM resources");
+		goto error;
+	}
+
+	bool success = false;
+	for (int i = 0; !success && i < conn->count_encoders; ++i) {
+		drmModeEncoder *enc = drmModeGetEncoder(state->fd, conn->encoders[i]);
+		if (!enc) {
+			continue;
+		}
+
+		for (int j = 0; j < res->count_crtcs; ++j) {
+			if ((enc->possible_crtcs & (1 << j)) == 0) {
+				continue;
+			}
+
+			if ((state->taken_crtcs & (1 << j)) == 0) {
+				state->taken_crtcs |= 1 << j;
+				output->crtc = res->crtcs[j];
+				success = true;
+				break;
+			}
+		}
+		drmModeFreeEncoder(enc);
+	}
+
+	drmModeFreeResources(res);
+
+	if (!success) {
+		wlr_log(L_ERROR, "Failed to find CRTC for %s", output->name);
+		goto error;
+	}
+
+	output->state = DRM_OUTPUT_CONNECTED;
+	output->width = mode->width;
+	output->height = mode->height;
+	output->wlr_output->current_mode = mode;
+
+	if (!display_init_renderer(&state->renderer, output)) {
+		wlr_log(L_ERROR, "Failed to initalise renderer for %s", output->name);
+		goto error;
+	}
+
+	drmModeFreeConnector(conn);
+	return true;
+
+error:
+	// TODO: destroy
+	wlr_drm_output_cleanup(output, false);
+	drmModeFreeConnector(conn);
+	return false;
+}
+
+static void wlr_drm_output_destroy(struct wlr_output_state *output) {
+	wlr_drm_output_cleanup(output, true);
+	wlr_drm_renderer_free(output->renderer);
+	free(output);
+}
+
+static struct wlr_output_impl output_impl = {
+	.set_mode = wlr_drm_output_set_mode,
+	.destroy = wlr_drm_output_destroy,
+};
+
 void wlr_drm_scan_connectors(struct wlr_backend_state *state) {
 	wlr_log(L_INFO, "Scanning DRM connectors");
 
@@ -186,171 +268,98 @@ void wlr_drm_scan_connectors(struct wlr_backend_state *state) {
 			continue;
 		}
 
-		struct wlr_drm_output *out;
+		struct wlr_output_state *output;
+		struct wlr_output *wlr_output;
 		int index = list_seq_find(state->outputs, find_id, &id);
 
 		if (index == -1) {
-			out = calloc(1, sizeof(struct wlr_drm_output));
-			if (!out) {
+			output = calloc(1, sizeof(struct wlr_output_state));
+			if (!state) {
+				drmModeFreeConnector(conn);
 				wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+				return;
+			}
+			wlr_output = output->wlr_output = wlr_output_create(&output_impl, output);
+			if (!wlr_output) {
 				drmModeFreeConnector(conn);
-				continue;
+				wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
+				return;
 			}
 
-			out->renderer = &state->renderer;
-			out->state = DRM_OUTPUT_DISCONNECTED;
-			out->connector = id;
-			snprintf(out->name, sizeof out->name, "%s-%"PRIu32,
+			output->renderer = &state->renderer;
+			output->state = DRM_OUTPUT_DISCONNECTED;
+			output->connector = id;
+			// TODO: Populate more wlr_output fields
+			// TODO: Move this to wlr_output->name
+			snprintf(output->name, sizeof(output->name), "%s-%"PRIu32,
 				 conn_name[conn->connector_type],
 				 conn->connector_type_id);
 
 			drmModeEncoder *curr_enc = drmModeGetEncoder(state->fd, conn->encoder_id);
 			if (curr_enc) {
-				out->old_crtc = drmModeGetCrtc(state->fd, curr_enc->crtc_id);
+				output->old_crtc = drmModeGetCrtc(state->fd, curr_enc->crtc_id);
 				free(curr_enc);
 			}
 
-			list_add(state->outputs, out);
-			wlr_log(L_INFO, "Found display '%s'", out->name);
+			list_add(state->outputs, output);
+			wlr_log(L_INFO, "Found display '%s'", output->name);
 		} else {
-			out = state->outputs->items[index];
+			output = state->outputs->items[index];
+			wlr_output = output->wlr_output;
 		}
 
-		if (out->state == DRM_OUTPUT_DISCONNECTED &&
+		// TODO: move state into wlr_output
+		if (output->state == DRM_OUTPUT_DISCONNECTED &&
 			conn->connection == DRM_MODE_CONNECTED) {
 
-			wlr_log(L_INFO, "'%s' connected", out->name);
-
-			out->modes = malloc(sizeof(*out->modes) * conn->count_modes);
-			if (!out->modes) {
-				wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
-				goto error;
-			}
-
+			wlr_log(L_INFO, "'%s' connected", output->name);
 			wlr_log(L_INFO, "Detected modes:");
 
-			out->num_modes = conn->count_modes;
 			for (int i = 0; i < conn->count_modes; ++i) {
-				drmModeModeInfo *mode = &conn->modes[i];
-				out->modes[i].width = mode->hdisplay;
-				out->modes[i].height = mode->vdisplay;
+				struct wlr_output_mode_state *_state = calloc(1,
+						sizeof(struct wlr_output_mode_state));
+				_state->mode = conn->modes[i];
+				struct wlr_output_mode *mode = calloc(1,
+						sizeof(struct wlr_output_mode));
+				mode->width = _state->mode.hdisplay;
 				// TODO: Calculate more accurate refresh rate
-				out->modes[i].rate = mode->vrefresh;
-				out->modes[i].mode = *mode;
+				// TODO: Check that this refresh rate is mHz
+				mode->height = _state->mode.vdisplay;
+				mode->state = _state;
 
 				wlr_log(L_INFO, "  %"PRIu16"@%"PRIu16"@%"PRIu32,
-					mode->hdisplay, mode->vdisplay,
-					mode->vrefresh);
-			}
-
-			out->state = DRM_OUTPUT_NEEDS_MODESET;
-			wlr_log(L_INFO, "Sending modesetting signal for '%s'", out->name);
-			wl_signal_emit(&state->backend->events.output_add, out);
-		} else if (out->state == DRM_OUTPUT_CONNECTED &&
-			conn->connection != DRM_MODE_CONNECTED) {
-
-			wlr_log(L_INFO, "'%s' disconnected", out->name);
-			wlr_drm_output_cleanup(out, false);
-		}
-error:
-		drmModeFreeConnector(conn);
-	}
-
-	drmModeFreeResources(res);
-}
-
-struct wlr_drm_mode *wlr_drm_output_get_modes(struct wlr_drm_output *out, size_t *count) {
-	if (out->state == DRM_OUTPUT_DISCONNECTED) {
-		*count = 0;
-		return NULL;
-	}
-
-	*count = out->num_modes;
-	return out->modes;
-}
-
-bool wlr_drm_output_modeset(struct wlr_drm_output *out, struct wlr_drm_mode *mode) {
-	struct wlr_backend_state *state = wl_container_of(out->renderer, state, renderer);
-
-	wlr_log(L_INFO, "Modesetting '%s' with '%ux%u@%u'", out->name, mode->width,
-		mode->height, mode->rate);
-
-	drmModeConnector *conn = drmModeGetConnector(state->fd, out->connector);
-	if (!conn) {
-		wlr_log(L_ERROR, "Failed to get DRM connector");
-		goto error;
-	}
-
-	if (conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0) {
-		wlr_log(L_ERROR, "%s is not connected", out->name);
-		goto error;
-	}
-
-	drmModeRes *res = drmModeGetResources(state->fd);
-	if (!res) {
-		wlr_log(L_ERROR, "Failed to get DRM resources");
-		goto error;
-	}
-
-	bool success = false;
-	for (int i = 0; !success && i < conn->count_encoders; ++i) {
-		drmModeEncoder *enc = drmModeGetEncoder(state->fd, conn->encoders[i]);
-		if (!enc)
-			continue;
+					_state->mode.hdisplay, _state->mode.vdisplay,
+					_state->mode.vrefresh);
 
-		for (int j = 0; j < res->count_crtcs; ++j) {
-			if ((enc->possible_crtcs & (1 << j)) == 0) {
-				continue;
+				list_add(wlr_output->modes, mode);
 			}
 
-			if ((state->taken_crtcs & (1 << j)) == 0) {
-				state->taken_crtcs |= 1 << j;
-				out->crtc = res->crtcs[j];
+			output->state = DRM_OUTPUT_NEEDS_MODESET;
+			wlr_log(L_INFO, "Sending modesetting signal for '%s'", output->name);
+			wl_signal_emit(&state->backend->events.output_add, wlr_output);
+		} else if (output->state == DRM_OUTPUT_CONNECTED &&
+			conn->connection != DRM_MODE_CONNECTED) {
 
-				success = true;
-				break;
-			}
+			wlr_log(L_INFO, "'%s' disconnected", output->name);
+			// TODO: Destroy
+			wlr_drm_output_cleanup(output, false);
 		}
 
-		drmModeFreeEncoder(enc);
+		drmModeFreeConnector(conn);
 	}
 
 	drmModeFreeResources(res);
-
-	if (!success) {
-		wlr_log(L_ERROR, "Failed to find CRTC for %s", out->name);
-		goto error;
-	}
-
-	out->state = DRM_OUTPUT_CONNECTED;
-	out->active_mode = mode;
-	out->width = mode->width;
-	out->height = mode->height;
-
-	if (!display_init_renderer(&state->renderer, out)) {
-		wlr_log(L_ERROR, "Failed to initalise renderer for %s", out->name);
-		goto error;
-	}
-
-	drmModeFreeConnector(conn);
-
-	return true;
-
-error:
-	wlr_drm_output_cleanup(out, false);
-	drmModeFreeConnector(conn);
-
-	return false;
 }
 
 static void page_flip_handler(int fd, unsigned seq,
 		unsigned tv_sec, unsigned tv_usec, void *user) {
-	struct wlr_drm_output *out = user;
-	struct wlr_backend_state *state = wl_container_of(out->renderer, state, renderer);
+	struct wlr_output_state *output = user;
+	struct wlr_backend_state *state =
+		wl_container_of(output->renderer, state, renderer);
 
-	out->pageflip_pending = false;
-	if (out->state == DRM_OUTPUT_CONNECTED) {
-		wl_signal_emit(&state->backend->events.output_frame, out);
+	output->pageflip_pending = false;
+	if (output->state == DRM_OUTPUT_CONNECTED) {
+		wl_signal_emit(&output->wlr_output->events.frame, output->wlr_output);
 	}
 }
 
@@ -361,66 +370,50 @@ int wlr_drm_event(int fd, uint32_t mask, void *data) {
 	};
 
 	drmHandleEvent(fd, &event);
-
 	return 1;
 }
 
-static void restore_output(struct wlr_drm_output *out, int fd) {
+static void restore_output(struct wlr_output_state *output, int fd) {
 	// Wait for any pending pageflips to finish
-	while (out->pageflip_pending) {
+	while (output->pageflip_pending) {
 		wlr_drm_event(fd, 0, NULL);
 	}
 
-	drmModeCrtc *crtc = out->old_crtc;
+	drmModeCrtc *crtc = output->old_crtc;
 	if (!crtc) {
 		return;
 	}
 
 	drmModeSetCrtc(fd, crtc->crtc_id, crtc->buffer_id, crtc->x, crtc->y,
-		&out->connector, 1, &crtc->mode);
+		&output->connector, 1, &crtc->mode);
 	drmModeFreeCrtc(crtc);
 }
 
-void wlr_drm_output_cleanup(struct wlr_drm_output *out, bool restore) {
-	if (!out) {
+void wlr_drm_output_cleanup(struct wlr_output_state *output, bool restore) {
+	if (!output) {
 		return;
 	}
 
-	struct wlr_drm_renderer *renderer = out->renderer;
+	struct wlr_drm_renderer *renderer = output->renderer;
 	struct wlr_backend_state *state = wl_container_of(renderer, state, renderer);
 
-	switch (out->state) {
+	switch (output->state) {
 	case DRM_OUTPUT_CONNECTED:
-		eglDestroySurface(renderer->egl.display, out->egl);
-		gbm_surface_destroy(out->gbm);
-
-		out->egl = EGL_NO_SURFACE;
-		out->gbm = NULL;
+		eglDestroySurface(renderer->egl.display, output->egl);
+		gbm_surface_destroy(output->gbm);
+		output->egl = EGL_NO_SURFACE;
+		output->gbm = NULL;
 		/* Fallthrough */
-
 	case DRM_OUTPUT_NEEDS_MODESET:
-		free(out->modes);
-		out->num_modes = 0;
-		out->modes = NULL;
-		out->active_mode = NULL;
-		out->width = 0;
-		out->height = 0;
-
-		out->state = DRM_OUTPUT_DISCONNECTED;
-
+		output->state = DRM_OUTPUT_DISCONNECTED;
 		if (restore) {
-			restore_output(out, renderer->fd);
+			restore_output(output, renderer->fd);
 		}
-
-		wlr_log(L_INFO, "Emmiting destruction signal for '%s'", out->name);
-		wl_signal_emit(&state->backend->events.output_remove, out);
+		wlr_log(L_INFO, "Emmiting destruction signal for '%s'", output->name);
+		wl_signal_emit(&state->backend->events.output_remove, output->wlr_output);
 		break;
-
 	case DRM_OUTPUT_DISCONNECTED:
 		break;
 	}
-}
-
-const char *wlr_drm_output_get_name(struct wlr_drm_output *out) {
-	return out->name;
+	// TODO: free wlr_output
 }