rootston: split rendering code into render.c

1 files changed, 5 insertions, 317 deletions

diff --git a/rootston/output.c b/rootston/output.c
index 595b401a..a6cdc25d 100644
--- a/rootston/output.c
+++ b/rootston/output.c
@@ -6,7 +6,6 @@
 #include <wlr/backend/drm.h>
 #include <wlr/config.h>
 #include <wlr/types/wlr_compositor.h>
-#include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_presentation_time.h>
 #include <wlr/types/wlr_wl_shell.h>
@@ -14,6 +13,7 @@
 #include <wlr/types/wlr_xdg_shell.h>
 #include <wlr/util/log.h>
 #include <wlr/util/region.h>
+#include <wlr/xwayland.h>
 #include "rootston/config.h"
 #include "rootston/layers.h"
 #include "rootston/output.h"
@@ -137,7 +137,7 @@ void output_view_for_each_surface(struct roots_output *output,
 }
 
 #if WLR_HAS_XWAYLAND
-static void output_xwayland_children_for_each_surface(
+void output_xwayland_children_for_each_surface(
 		struct roots_output *output, struct wlr_xwayland_surface *surface,
 		roots_surface_iterator_func_t iterator, void *user_data) {
 	struct wlr_xwayland_surface *child;
@@ -218,105 +218,18 @@ void output_for_each_surface(struct roots_output *output,
 	}
 }
 
-
-struct render_data {
-	pixman_region32_t *damage;
-	float alpha;
-};
-
-static void scissor_output(struct wlr_output *wlr_output,
-		pixman_box32_t *rect) {
-	struct wlr_renderer *renderer =
-		wlr_backend_get_renderer(wlr_output->backend);
-	assert(renderer);
-
-	struct wlr_box box = {
-		.x = rect->x1,
-		.y = rect->y1,
-		.width = rect->x2 - rect->x1,
-		.height = rect->y2 - rect->y1,
-	};
-
-	int ow, oh;
-	wlr_output_transformed_resolution(wlr_output, &ow, &oh);
-
-	enum wl_output_transform transform =
-		wlr_output_transform_invert(wlr_output->transform);
-	wlr_box_transform(&box, &box, transform, ow, oh);
-
-	wlr_renderer_scissor(renderer, &box);
-}
-
 static int scale_length(int length, int offset, float scale) {
 	return round((offset + length) * scale) - round(offset * scale);
 }
 
-static void scale_box(struct wlr_box *box, float scale) {
+void scale_box(struct wlr_box *box, float scale) {
 	box->width = scale_length(box->width, box->x, scale);
 	box->height = scale_length(box->height, box->y, scale);
 	box->x = round(box->x * scale);
 	box->y = round(box->y * scale);
 }
 
-static void render_texture(struct wlr_output *wlr_output,
-		pixman_region32_t *output_damage, struct wlr_texture *texture,
-		const struct wlr_box *box, const float matrix[static 9],
-		float rotation, float alpha) {
-	struct wlr_renderer *renderer =
-		wlr_backend_get_renderer(wlr_output->backend);
-	assert(renderer);
-
-	struct wlr_box rotated;
-	wlr_box_rotated_bounds(&rotated, box, rotation);
-
-	pixman_region32_t damage;
-	pixman_region32_init(&damage);
-	pixman_region32_union_rect(&damage, &damage, rotated.x, rotated.y,
-		rotated.width, rotated.height);
-	pixman_region32_intersect(&damage, &damage, output_damage);
-	bool damaged = pixman_region32_not_empty(&damage);
-	if (!damaged) {
-		goto damage_finish;
-	}
-
-	int nrects;
-	pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
-	for (int i = 0; i < nrects; ++i) {
-		scissor_output(wlr_output, &rects[i]);
-		wlr_render_texture_with_matrix(renderer, texture, matrix, alpha);
-	}
-
-damage_finish:
-	pixman_region32_fini(&damage);
-}
-
-static void render_surface_iterator(struct roots_output *output,
-		struct wlr_surface *surface, struct wlr_box *_box, float rotation,
-		void *_data) {
-	struct render_data *data = _data;
-	struct wlr_output *wlr_output = output->wlr_output;
-	pixman_region32_t *output_damage = data->damage;
-	float alpha = data->alpha;
-
-	struct wlr_texture *texture = wlr_surface_get_texture(surface);
-	if (!texture) {
-		return;
-	}
-
-	struct wlr_box box = *_box;
-	scale_box(&box, wlr_output->scale);
-
-	float matrix[9];
-	enum wl_output_transform transform =
-		wlr_output_transform_invert(surface->current.transform);
-	wlr_matrix_project_box(matrix, &box, transform, rotation,
-		wlr_output->transform_matrix);
-
-	render_texture(wlr_output, output_damage,
-		texture, &box, matrix, rotation, alpha);
-}
-
-static void get_decoration_box(struct roots_view *view,
+void get_decoration_box(struct roots_view *view,
 		struct roots_output *output, struct wlr_box *box) {
 	struct wlr_output *wlr_output = output->wlr_output;
 
@@ -338,231 +251,6 @@ static void get_decoration_box(struct roots_view *view,
 	box->height = deco_box.height * wlr_output->scale;
 }
 
-static void render_decorations(struct roots_output *output,
-		struct roots_view *view, struct render_data *data) {
-	if (!view->decorated || view->wlr_surface == NULL) {
-		return;
-	}
-
-	struct wlr_renderer *renderer =
-		wlr_backend_get_renderer(output->wlr_output->backend);
-	assert(renderer);
-
-	struct wlr_box box;
-	get_decoration_box(view, output, &box);
-
-	struct wlr_box rotated;
-	wlr_box_rotated_bounds(&rotated, &box, view->rotation);
-
-	pixman_region32_t damage;
-	pixman_region32_init(&damage);
-	pixman_region32_union_rect(&damage, &damage, rotated.x, rotated.y,
-		rotated.width, rotated.height);
-	pixman_region32_intersect(&damage, &damage, data->damage);
-	bool damaged = pixman_region32_not_empty(&damage);
-	if (!damaged) {
-		goto damage_finish;
-	}
-
-	float matrix[9];
-	wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL,
-		view->rotation, output->wlr_output->transform_matrix);
-	float color[] = { 0.2, 0.2, 0.2, view->alpha };
-
-	int nrects;
-	pixman_box32_t *rects =
-		pixman_region32_rectangles(&damage, &nrects);
-	for (int i = 0; i < nrects; ++i) {
-		scissor_output(output->wlr_output, &rects[i]);
-		wlr_render_quad_with_matrix(renderer, color, matrix);
-	}
-
-damage_finish:
-	pixman_region32_fini(&damage);
-}
-
-static void render_view(struct roots_output *output, struct roots_view *view,
-		struct render_data *data) {
-	// Do not render views fullscreened on other outputs
-	if (view->fullscreen_output != NULL && view->fullscreen_output != output) {
-		return;
-	}
-
-	data->alpha = view->alpha;
-	if (view->fullscreen_output == NULL) {
-		render_decorations(output, view, data);
-	}
-	output_view_for_each_surface(output, view, render_surface_iterator, data);
-}
-
-static void render_layer(struct roots_output *output,
-		pixman_region32_t *damage, struct wl_list *layer_surfaces) {
-	struct render_data data = {
-		.damage = damage,
-		.alpha = 1.0f,
-	};
-	output_layer_for_each_surface(output, layer_surfaces,
-		render_surface_iterator, &data);
-}
-
-static void render_drag_icons(struct roots_output *output,
-		pixman_region32_t *damage, struct roots_input *input) {
-	struct render_data data = {
-		.damage = damage,
-		.alpha = 1.0f,
-	};
-	output_drag_icons_for_each_surface(output, input,
-		render_surface_iterator, &data);
-}
-
-static void surface_send_frame_done_iterator(struct roots_output *output,
-		struct wlr_surface *surface, struct wlr_box *box, float rotation,
-		void *data) {
-	struct timespec *when = data;
-	wlr_surface_send_frame_done(surface, when);
-}
-
-static void render_output(struct roots_output *output) {
-	struct wlr_output *wlr_output = output->wlr_output;
-	struct roots_desktop *desktop = output->desktop;
-	struct roots_server *server = desktop->server;
-	struct wlr_renderer *renderer =
-		wlr_backend_get_renderer(wlr_output->backend);
-	assert(renderer);
-
-	if (!wlr_output->enabled) {
-		return;
-	}
-
-	struct timespec now;
-	clock_gettime(CLOCK_MONOTONIC, &now);
-
-	float clear_color[] = {0.25f, 0.25f, 0.25f, 1.0f};
-
-	const struct wlr_box *output_box =
-		wlr_output_layout_get_box(desktop->layout, wlr_output);
-
-	// Check if we can delegate the fullscreen surface to the output
-	if (output->fullscreen_view != NULL &&
-			output->fullscreen_view->wlr_surface != NULL) {
-		struct roots_view *view = output->fullscreen_view;
-
-		// Make sure the view is centered on screen
-		struct wlr_box view_box;
-		view_get_box(view, &view_box);
-		double view_x = (double)(output_box->width - view_box.width) / 2 +
-			output_box->x;
-		double view_y = (double)(output_box->height - view_box.height) / 2 +
-			output_box->y;
-		view_move(view, view_x, view_y);
-
-		// Fullscreen views are rendered on a black background
-		clear_color[0] = clear_color[1] = clear_color[2] = 0;
-	}
-
-	bool needs_swap;
-	pixman_region32_t damage;
-	pixman_region32_init(&damage);
-	if (!wlr_output_damage_make_current(output->damage, &needs_swap, &damage)) {
-		return;
-	}
-
-	struct render_data data = {
-		.damage = &damage,
-		.alpha = 1.0,
-	};
-
-	if (!needs_swap) {
-		// Output doesn't need swap and isn't damaged, skip rendering completely
-		goto damage_finish;
-	}
-
-	wlr_renderer_begin(renderer, wlr_output->width, wlr_output->height);
-
-	if (!pixman_region32_not_empty(&damage)) {
-		// Output isn't damaged but needs buffer swap
-		goto renderer_end;
-	}
-
-	if (server->config->debug_damage_tracking) {
-		wlr_renderer_clear(renderer, (float[]){1, 1, 0, 1});
-	}
-
-	int nrects;
-	pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
-	for (int i = 0; i < nrects; ++i) {
-		scissor_output(output->wlr_output, &rects[i]);
-		wlr_renderer_clear(renderer, clear_color);
-	}
-
-	render_layer(output, &damage,
-		&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
-	render_layer(output, &damage,
-		&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
-
-	// If a view is fullscreen on this output, render it
-	if (output->fullscreen_view != NULL) {
-		struct roots_view *view = output->fullscreen_view;
-
-		render_view(output, view, &data);
-
-		// During normal rendering the xwayland window tree isn't traversed
-		// because all windows are rendered. Here we only want to render
-		// the fullscreen window's children so we have to traverse the tree.
-#if WLR_HAS_XWAYLAND
-		if (view->type == ROOTS_XWAYLAND_VIEW) {
-			struct roots_xwayland_surface *xwayland_surface =
-				roots_xwayland_surface_from_view(view);
-			output_xwayland_children_for_each_surface(output,
-				xwayland_surface->xwayland_surface,
-				render_surface_iterator, &data);
-		}
-#endif
-	} else {
-		// Render all views
-		struct roots_view *view;
-		wl_list_for_each_reverse(view, &desktop->views, link) {
-			render_view(output, view, &data);
-		}
-		// Render top layer above shell views
-		render_layer(output, &damage,
-			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
-	}
-
-	render_drag_icons(output, &damage, server->input);
-
-	render_layer(output, &damage,
-		&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
-
-renderer_end:
-	wlr_output_render_software_cursors(wlr_output, &damage);
-	wlr_renderer_scissor(renderer, NULL);
-	wlr_renderer_end(renderer);
-
-	int width, height;
-	wlr_output_transformed_resolution(wlr_output, &width, &height);
-
-	if (server->config->debug_damage_tracking) {
-		pixman_region32_union_rect(&damage, &damage, 0, 0, width, height);
-	}
-
-	enum wl_output_transform transform =
-		wlr_output_transform_invert(wlr_output->transform);
-	wlr_region_transform(&damage, &damage, transform, width, height);
-
-	if (!wlr_output_damage_swap_buffers(output->damage, &now, &damage)) {
-		goto damage_finish;
-	}
-	output->last_frame = desktop->last_frame = now;
-
-damage_finish:
-	pixman_region32_fini(&damage);
-
-	// Send frame done events to all surfaces
-	output_for_each_surface(output, surface_send_frame_done_iterator,
-		&now);
-}
-
 void output_damage_whole(struct roots_output *output) {
 	wlr_output_damage_add_whole(output->damage);
 }
@@ -743,7 +431,7 @@ static void output_damage_handle_frame(struct wl_listener *listener,
 		void *data) {
 	struct roots_output *output =
 		wl_container_of(listener, output, damage_frame);
-	render_output(output);
+	output_render(output);
 }
 
 static void output_damage_handle_destroy(struct wl_listener *listener,