render: pass rendering state together in a struct

This lets us easily add rendering state that we need in the future

4 files changed, 145 insertions, 152 deletions

diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index 2255b551..02e08bd2 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -613,10 +613,22 @@ static int output_repaint_timer_handler(void *data) {
 	pixman_region32_init(&damage);
 	wlr_damage_ring_get_buffer_damage(&output->damage_ring, buffer_age, &damage);
 
+	if (debug.damage == DAMAGE_RERENDER) {
+		int width, height;
+		wlr_output_transformed_resolution(wlr_output, &width, &height);
+		pixman_region32_union_rect(&damage, &damage, 0, 0, width, height);
+	}
+
+	struct render_context ctx = {
+		.output_damage = &damage,
+		.renderer = wlr_output->renderer,
+		.output = output,
+	};
+
 	struct timespec now;
 	clock_gettime(CLOCK_MONOTONIC, &now);
 
-	output_render(output, &damage);
+	output_render(&ctx);
 
 	pixman_region32_fini(&damage);
 
diff --git a/sway/desktop/render.c b/sway/desktop/render.c
index a4d633e0..f011e0ff 100644
--- a/sway/desktop/render.c
+++ b/sway/desktop/render.c
@@ -32,6 +32,7 @@
 #endif
 
 struct render_data {
+	struct render_context *ctx;
 	const pixman_region32_t *damage;
 	float alpha;
 	struct wlr_box *clip_box;
@@ -101,18 +102,17 @@ static void set_scale_filter(struct wlr_output *wlr_output,
 #endif
 }
 
-static void render_texture(struct wlr_output *wlr_output,
-		const pixman_region32_t *output_damage, struct wlr_texture *texture,
+static void render_texture(struct render_context *ctx, struct wlr_texture *texture,
 		const struct wlr_fbox *src_box, const struct wlr_box *dst_box,
 		const float matrix[static 9], float alpha) {
-	struct wlr_renderer *renderer = wlr_output->renderer;
-	struct sway_output *output = wlr_output->data;
+	struct wlr_renderer *renderer = ctx->renderer;
+	struct sway_output *output = ctx->output;
 
 	pixman_region32_t damage;
 	pixman_region32_init(&damage);
 	pixman_region32_union_rect(&damage, &damage, dst_box->x, dst_box->y,
 		dst_box->width, dst_box->height);
-	pixman_region32_intersect(&damage, &damage, output_damage);
+	pixman_region32_intersect(&damage, &damage, ctx->output_damage);
 	bool damaged = pixman_region32_not_empty(&damage);
 	if (!damaged) {
 		goto damage_finish;
@@ -121,8 +121,8 @@ static void render_texture(struct wlr_output *wlr_output,
 	int nrects;
 	pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
 	for (int i = 0; i < nrects; ++i) {
-		scissor_output(wlr_output, &rects[i]);
-		set_scale_filter(wlr_output, texture, output->scale_filter);
+		scissor_output(output->wlr_output, &rects[i]);
+		set_scale_filter(output->wlr_output, texture, output->scale_filter);
 		if (src_box != NULL) {
 			wlr_render_subtexture_with_matrix(renderer, texture, src_box, matrix, alpha);
 		} else {
@@ -139,7 +139,6 @@ static void render_surface_iterator(struct sway_output *output,
 		struct wlr_box *_box, void *_data) {
 	struct render_data *data = _data;
 	struct wlr_output *wlr_output = output->wlr_output;
-	const pixman_region32_t *output_damage = data->damage;
 	float alpha = data->alpha;
 
 	struct wlr_texture *texture = wlr_surface_get_texture(surface);
@@ -167,73 +166,68 @@ static void render_surface_iterator(struct sway_output *output,
 	}
 	scale_box(&dst_box, wlr_output->scale);
 
-	render_texture(wlr_output, output_damage, texture,
+	render_texture(data->ctx, texture,
 		&src_box, &dst_box, matrix, alpha);
 
 	wlr_presentation_surface_sampled_on_output(server.presentation, surface,
 		wlr_output);
 }
 
-static void render_layer_toplevel(struct sway_output *output,
-		const pixman_region32_t *damage, struct wl_list *layer_surfaces) {
+static void render_layer_toplevel(struct render_context *ctx, struct wl_list *layer_surfaces) {
 	struct render_data data = {
-		.damage = damage,
 		.alpha = 1.0f,
+		.ctx = ctx,
 	};
-	output_layer_for_each_toplevel_surface(output, layer_surfaces,
+	output_layer_for_each_toplevel_surface(ctx->output, layer_surfaces,
 		render_surface_iterator, &data);
 }
 
-static void render_layer_popups(struct sway_output *output,
-		const pixman_region32_t *damage, struct wl_list *layer_surfaces) {
+static void render_layer_popups(struct render_context *ctx, struct wl_list *layer_surfaces) {
 	struct render_data data = {
-		.damage = damage,
 		.alpha = 1.0f,
+		.ctx = ctx,
 	};
-	output_layer_for_each_popup_surface(output, layer_surfaces,
+	output_layer_for_each_popup_surface(ctx->output, layer_surfaces,
 		render_surface_iterator, &data);
 }
 
 #if HAVE_XWAYLAND
-static void render_unmanaged(struct sway_output *output,
-		const pixman_region32_t *damage, struct wl_list *unmanaged) {
+static void render_unmanaged(struct render_context *ctx, struct wl_list *unmanaged) {
 	struct render_data data = {
-		.damage = damage,
 		.alpha = 1.0f,
+		.ctx = ctx,
 	};
-	output_unmanaged_for_each_surface(output, unmanaged,
+	output_unmanaged_for_each_surface(ctx->output, unmanaged,
 		render_surface_iterator, &data);
 }
 #endif
 
-static void render_drag_icons(struct sway_output *output,
-		const pixman_region32_t *damage, struct wl_list *drag_icons) {
+static void render_drag_icons(struct render_context *ctx, struct wl_list *drag_icons) {
 	struct render_data data = {
-		.damage = damage,
 		.alpha = 1.0f,
+		.ctx = ctx,
 	};
-	output_drag_icons_for_each_surface(output, drag_icons,
+	output_drag_icons_for_each_surface(ctx->output, drag_icons,
 		render_surface_iterator, &data);
 }
 
 // _box.x and .y are expected to be layout-local
 // _box.width and .height are expected to be output-buffer-local
-void render_rect(struct sway_output *output,
-		const pixman_region32_t *output_damage, const struct wlr_box *_box,
+void render_rect(struct render_context *ctx, const struct wlr_box *_box,
 		float color[static 4]) {
-	struct wlr_output *wlr_output = output->wlr_output;
-	struct wlr_renderer *renderer = wlr_output->renderer;
+	struct wlr_output *wlr_output = ctx->output->wlr_output;
+	struct wlr_renderer *renderer = ctx->renderer;
 
 	struct wlr_box box;
 	memcpy(&box, _box, sizeof(struct wlr_box));
-	box.x -= output->lx * wlr_output->scale;
-	box.y -= output->ly * wlr_output->scale;
+	box.x -= ctx->output->lx * wlr_output->scale;
+	box.y -= ctx->output->ly * wlr_output->scale;
 
 	pixman_region32_t damage;
 	pixman_region32_init(&damage);
 	pixman_region32_union_rect(&damage, &damage, box.x, box.y,
 		box.width, box.height);
-	pixman_region32_intersect(&damage, &damage, output_damage);
+	pixman_region32_intersect(&damage, &damage, ctx->output_damage);
 	bool damaged = pixman_region32_not_empty(&damage);
 	if (!damaged) {
 		goto damage_finish;
@@ -258,11 +252,11 @@ void premultiply_alpha(float color[4], float opacity) {
 	color[2] *= color[3];
 }
 
-static void render_view_toplevels(struct sway_view *view,
-		struct sway_output *output, const pixman_region32_t *damage, float alpha) {
+static void render_view_toplevels(struct render_context *ctx,
+		struct sway_view *view, float alpha) {
 	struct render_data data = {
-		.damage = damage,
 		.alpha = alpha,
+		.ctx = ctx,
 	};
 	struct wlr_box clip_box;
 	if (!container_is_current_floating(view->container)) {
@@ -274,25 +268,26 @@ static void render_view_toplevels(struct sway_view *view,
 	}
 	// Render all toplevels without descending into popups
 	double ox = view->container->surface_x -
-		output->lx - view->geometry.x;
+		ctx->output->lx - view->geometry.x;
 	double oy = view->container->surface_y -
-		output->ly - view->geometry.y;
-	output_surface_for_each_surface(output, view->surface, ox, oy,
+		ctx->output->ly - view->geometry.y;
+	output_surface_for_each_surface(ctx->output, view->surface, ox, oy,
 			render_surface_iterator, &data);
 }
 
-static void render_view_popups(struct sway_view *view,
-		struct sway_output *output, const pixman_region32_t *damage, float alpha) {
+static void render_view_popups(struct render_context *ctx, struct sway_view *view,
+		float alpha) {
 	struct render_data data = {
-		.damage = damage,
 		.alpha = alpha,
+		.ctx = ctx,
 	};
-	output_view_for_each_popup_surface(output, view,
+	output_view_for_each_popup_surface(ctx->output, view,
 		render_surface_iterator, &data);
 }
 
-static void render_saved_view(struct sway_view *view,
-		struct sway_output *output, const pixman_region32_t *damage, float alpha) {
+static void render_saved_view(struct render_context *ctx, struct sway_view *view,
+		float alpha) {
+	struct sway_output *output = ctx->output;
 	struct wlr_output *wlr_output = output->wlr_output;
 
 	if (wl_list_empty(&view->saved_buffers)) {
@@ -343,7 +338,7 @@ static void render_saved_view(struct sway_view *view,
 		}
 		scale_box(&dst_box, wlr_output->scale);
 
-		render_texture(wlr_output, damage, saved_buf->buffer->texture,
+		render_texture(ctx, saved_buf->buffer->texture,
 			&saved_buf->source_box, &dst_box, matrix, alpha);
 	}
 
@@ -355,13 +350,13 @@ static void render_saved_view(struct sway_view *view,
 /**
  * Render a view's surface and left/bottom/right borders.
  */
-static void render_view(struct sway_output *output, const pixman_region32_t *damage,
+static void render_view(struct render_context *ctx,
 		struct sway_container *con, struct border_colors *colors) {
 	struct sway_view *view = con->view;
 	if (!wl_list_empty(&view->saved_buffers)) {
-		render_saved_view(view, output, damage, view->container->alpha);
+		render_saved_view(ctx, view, view->container->alpha);
 	} else if (view->surface) {
-		render_view_toplevels(view, output, damage, view->container->alpha);
+		render_view_toplevels(ctx, view, view->container->alpha);
 	}
 
 	if (con->current.border == B_NONE || con->current.border == B_CSD) {
@@ -369,7 +364,7 @@ static void render_view(struct sway_output *output, const pixman_region32_t *dam
 	}
 
 	struct wlr_box box;
-	float output_scale = output->wlr_output->scale;
+	float output_scale = ctx->output->wlr_output->scale;
 	float color[4];
 	struct sway_container_state *state = &con->current;
 
@@ -381,7 +376,7 @@ static void render_view(struct sway_output *output, const pixman_region32_t *dam
 		box.width = state->border_thickness;
 		box.height = state->content_height;
 		scale_box(&box, output_scale);
-		render_rect(output, damage, &box, color);
+		render_rect(ctx, &box, color);
 	}
 
 	list_t *siblings = container_get_current_siblings(con);
@@ -400,7 +395,7 @@ static void render_view(struct sway_output *output, const pixman_region32_t *dam
 		box.width = state->border_thickness;
 		box.height = state->content_height;
 		scale_box(&box, output_scale);
-		render_rect(output, damage, &box, color);
+		render_rect(ctx, &box, color);
 	}
 
 	if (state->border_bottom) {
@@ -415,7 +410,7 @@ static void render_view(struct sway_output *output, const pixman_region32_t *dam
 		box.width = state->width;
 		box.height = state->border_thickness;
 		scale_box(&box, output_scale);
-		render_rect(output, damage, &box, color);
+		render_rect(ctx, &box, color);
 	}
 }
 
@@ -428,13 +423,13 @@ static void render_view(struct sway_output *output, const pixman_region32_t *dam
  * The height is: 1px border, 3px padding, font height, 3px padding, 1px border
  * The left side is: 1px border, 2px padding, title
  */
-static void render_titlebar(struct sway_output *output,
-		const pixman_region32_t *output_damage, struct sway_container *con,
+static void render_titlebar(struct render_context *ctx, struct sway_container *con,
 		int x, int y, int width,
 		struct border_colors *colors, struct wlr_texture *title_texture,
 		struct wlr_texture *marks_texture) {
 	struct wlr_box box;
 	float color[4];
+	struct sway_output *output = ctx->output;
 	float output_scale = output->wlr_output->scale;
 	double output_x = output->lx;
 	double output_y = output->ly;
@@ -451,7 +446,7 @@ static void render_titlebar(struct sway_output *output,
 	box.width = width;
 	box.height = titlebar_border_thickness;
 	scale_box(&box, output_scale);
-	render_rect(output, output_damage, &box, color);
+	render_rect(ctx, &box, color);
 
 	// Single pixel bar below title
 	box.x = x;
@@ -459,7 +454,7 @@ static void render_titlebar(struct sway_output *output,
 	box.width = width;
 	box.height = titlebar_border_thickness;
 	scale_box(&box, output_scale);
-	render_rect(output, output_damage, &box, color);
+	render_rect(ctx, &box, color);
 
 	// Single pixel left edge
 	box.x = x;
@@ -467,7 +462,7 @@ static void render_titlebar(struct sway_output *output,
 	box.width = titlebar_border_thickness;
 	box.height = container_titlebar_height() - titlebar_border_thickness * 2;
 	scale_box(&box, output_scale);
-	render_rect(output, output_damage, &box, color);
+	render_rect(ctx, &box, color);
 
 	// Single pixel right edge
 	box.x = x + width - titlebar_border_thickness;
@@ -475,7 +470,7 @@ static void render_titlebar(struct sway_output *output,
 	box.width = titlebar_border_thickness;
 	box.height = container_titlebar_height() - titlebar_border_thickness * 2;
 	scale_box(&box, output_scale);
-	render_rect(output, output_damage, &box, color);
+	render_rect(ctx, &box, color);
 
 	int inner_x = x - output_x + titlebar_h_padding;
 	int bg_y = y + titlebar_border_thickness;
@@ -524,7 +519,7 @@ static void render_titlebar(struct sway_output *output,
 		if (ob_inner_width < texture_box.width) {
 			texture_box.width = ob_inner_width;
 		}
-		render_texture(output->wlr_output, output_damage, marks_texture,
+		render_texture(ctx, marks_texture,
 			NULL, &texture_box, matrix, con->alpha);
 
 		// Padding above
@@ -534,12 +529,12 @@ static void render_titlebar(struct sway_output *output,
 		box.y = roundf((y + titlebar_border_thickness) * output_scale);
 		box.width = texture_box.width;
 		box.height = ob_padding_above;
-		render_rect(output, output_damage, &box, color);
+		render_rect(ctx, &box, color);
 
 		// Padding below
 		box.y += ob_padding_above + texture_box.height;
 		box.height = ob_padding_below;
-		render_rect(output, output_damage, &box, color);
+		render_rect(ctx, &box, color);
 	}
 
 	// Title text
@@ -600,7 +595,7 @@ static void render_titlebar(struct sway_output *output,
 			texture_box.width = ob_inner_width - ob_marks_width;
 		}
 
-		render_texture(output->wlr_output, output_damage, title_texture,
+		render_texture(ctx, title_texture,
 			NULL, &texture_box, matrix, con->alpha);
 
 		// Padding above
@@ -610,12 +605,12 @@ static void render_titlebar(struct sway_output *output,
 		box.y = roundf((y + titlebar_border_thickness) * output_scale);
 		box.width = texture_box.width;
 		box.height = ob_padding_above;
-		render_rect(output, output_damage, &box, color);
+		render_rect(ctx, &box, color);
 
 		// Padding below
 		box.y += ob_padding_above + texture_box.height;
 		box.height = ob_padding_below;
-		render_rect(output, output_damage, &box, color);
+		render_rect(ctx, &box, color);
 	}
 
 	// Determine the left + right extends of the textures (output-buffer local)
@@ -649,7 +644,7 @@ static void render_titlebar(struct sway_output *output,
 		box.x = ob_left_x + ob_left_width + round(output_x * output_scale);
 		box.y = roundf(bg_y * output_scale);
 		box.height = ob_bg_height;
-		render_rect(output, output_damage, &box, color);
+		render_rect(ctx, &box, color);
 	}
 
 	// Padding on left side
@@ -663,7 +658,7 @@ static void render_titlebar(struct sway_output *output,
 	if (box.x + box.width < left_x) {
 		box.width += left_x - box.x - box.width;
 	}
-	render_rect(output, output_damage, &box, color);
+	render_rect(ctx, &box, color);
 
 	// Padding on right side
 	box.x = x + width - titlebar_h_padding;
@@ -677,14 +672,13 @@ static void render_titlebar(struct sway_output *output,
 		box.width += box.x - right_rx;
 		box.x = right_rx;
 	}
-	render_rect(output, output_damage, &box, color);
+	render_rect(ctx, &box, color);
 }
 
 /**
  * Render the top border line for a view using "border pixel".
  */
-static void render_top_border(struct sway_output *output,
-		const pixman_region32_t *output_damage, struct sway_container *con,
+static void render_top_border(struct render_context *ctx, struct sway_container *con,
 		struct border_colors *colors) {
 	struct sway_container_state *state = &con->current;
 	if (!state->border_top) {
@@ -692,7 +686,7 @@ static void render_top_border(struct sway_output *output,
 	}
 	struct wlr_box box;
 	float color[4];
-	float output_scale = output->wlr_output->scale;
+	float output_scale = ctx->output->wlr_output->scale;
 
 	// Child border - top edge
 	memcpy(&color, colors->child_border, sizeof(float) * 4);
@@ -702,7 +696,7 @@ static void render_top_border(struct sway_output *output,
 	box.width = state->width;
 	box.height = state->border_thickness;
 	scale_box(&box, output_scale);
-	render_rect(output, output_damage, &box, color);
+	render_rect(ctx, &box, color);
 }
 
 struct parent_data {
@@ -713,8 +707,8 @@ struct parent_data {
 	struct sway_container *active_child;
 };
 
-static void render_container(struct sway_output *output,
-	const pixman_region32_t *damage, struct sway_container *con, bool parent_focused);
+static void render_container(struct render_context *ctx,
+	struct sway_container *con, bool parent_focused);
 
 /**
  * Render a container's children using a L_HORIZ or L_VERT layout.
@@ -722,8 +716,7 @@ static void render_container(struct sway_output *output,
  * Wrap child views in borders and leave child containers borderless because
  * they'll apply their own borders to their children.
  */
-static void render_containers_linear(struct sway_output *output,
-		const pixman_region32_t *damage, struct parent_data *parent) {
+static void render_containers_linear(struct render_context *ctx, struct parent_data *parent) {
 	for (int i = 0; i < parent->children->length; ++i) {
 		struct sway_container *child = parent->children->items[i];
 
@@ -753,15 +746,15 @@ static void render_containers_linear(struct sway_output *output,
 			}
 
 			if (state->border == B_NORMAL) {
-				render_titlebar(output, damage, child, floor(state->x),
+				render_titlebar(ctx, child, floor(state->x),
 						floor(state->y), state->width, colors,
 						title_texture, marks_texture);
 			} else if (state->border == B_PIXEL) {
-				render_top_border(output, damage, child, colors);
+				render_top_border(ctx, child, colors);
 			}
-			render_view(output, damage, child, colors);
+			render_view(ctx, child, colors);
 		} else {
-			render_container(output, damage, child,
+			render_container(ctx, child,
 					parent->focused || child->current.focused);
 		}
 	}
@@ -778,8 +771,7 @@ static bool container_has_focused_child(struct sway_container *con) {
 /**
  * Render a container's children using the L_TABBED layout.
  */
-static void render_containers_tabbed(struct sway_output *output,
-		const pixman_region32_t *damage, struct parent_data *parent) {
+static void render_containers_tabbed(struct render_context *ctx, struct parent_data *parent) {
 	if (!parent->children->length) {
 		return;
 	}
@@ -827,7 +819,7 @@ static void render_containers_tabbed(struct sway_output *output,
 			tab_width = parent->box.width - tab_width * i;
 		}
 
-		render_titlebar(output, damage, child, x, parent->box.y, tab_width,
+		render_titlebar(ctx, child, x, parent->box.y, tab_width,
 				colors, title_texture, marks_texture);
 
 		if (child == current) {
@@ -837,9 +829,9 @@ static void render_containers_tabbed(struct sway_output *output,
 
 	// Render surface and left/right/bottom borders
 	if (current->view) {
-		render_view(output, damage, current, current_colors);
+		render_view(ctx, current, current_colors);
 	} else {
-		render_container(output, damage, current,
+		render_container(ctx, current,
 				parent->focused || current->current.focused);
 	}
 }
@@ -847,8 +839,7 @@ static void render_containers_tabbed(struct sway_output *output,
 /**
  * Render a container's children using the L_STACKED layout.
  */
-static void render_containers_stacked(struct sway_output *output,
-		const pixman_region32_t *damage, struct parent_data *parent) {
+static void render_containers_stacked(struct render_context *ctx, struct parent_data *parent) {
 	if (!parent->children->length) {
 		return;
 	}
@@ -890,7 +881,7 @@ static void render_containers_stacked(struct sway_output *output,
 		}
 
 		int y = parent->box.y + titlebar_height * i;
-		render_titlebar(output, damage, child, parent->box.x, y,
+		render_titlebar(ctx, child, parent->box.x, y,
 				parent->box.width, colors, title_texture, marks_texture);
 
 		if (child == current) {
@@ -900,19 +891,18 @@ static void render_containers_stacked(struct sway_output *output,
 
 	// Render surface and left/right/bottom borders
 	if (current->view) {
-		render_view(output, damage, current, current_colors);
+		render_view(ctx, current, current_colors);
 	} else {
-		render_container(output, damage, current,
+		render_container(ctx, current,
 				parent->focused || current->current.focused);
 	}
 }
 
-static void render_containers(struct sway_output *output,
-		const pixman_region32_t *damage, struct parent_data *parent) {
+static void render_containers(struct render_context *ctx, struct parent_data *parent) {
 	if (config->hide_lone_tab && parent->children->length == 1) {
 		struct sway_container *child = parent->children->items[0];
 		if (child->view) {
-			render_containers_linear(output,damage, parent);
+			render_containers_linear(ctx, parent);
 			return;
 		}
 	}
@@ -921,19 +911,19 @@ static void render_containers(struct sway_output *output,
 	case L_NONE:
 	case L_HORIZ:
 	case L_VERT:
-		render_containers_linear(output, damage, parent);
+		render_containers_linear(ctx, parent);
 		break;
 	case L_STACKED:
-		render_containers_stacked(output, damage, parent);
+		render_containers_stacked(ctx, parent);
 		break;
 	case L_TABBED:
-		render_containers_tabbed(output, damage, parent);
+		render_containers_tabbed(ctx, parent);
 		break;
 	}
 }
 
-static void render_container(struct sway_output *output,
-		const pixman_region32_t *damage, struct sway_container *con, bool focused) {
+static void render_container(struct render_context *ctx,
+		struct sway_container *con, bool focused) {
 	struct parent_data data = {
 		.layout = con->current.layout,
 		.box = {
@@ -946,11 +936,11 @@ static void render_container(struct sway_output *output,
 		.focused = focused,
 		.active_child = con->current.focused_inactive_child,
 	};
-	render_containers(output, damage, &data);
+	render_containers(ctx, &data);
 }
 
-static void render_workspace(struct sway_output *output,
-		const pixman_region32_t *damage, struct sway_workspace *ws, bool focused) {
+static void render_workspace(struct render_context *ctx,
+		struct sway_workspace *ws, bool focused) {
 	struct parent_data data = {
 		.layout = ws->current.layout,
 		.box = {
@@ -963,11 +953,11 @@ static void render_workspace(struct sway_output *output,
 		.focused = focused,
 		.active_child = ws->current.focused_inactive_child,
 	};
-	render_containers(output, damage, &data);
+	render_containers(ctx, &data);
 }
 
-static void render_floating_container(struct sway_output *soutput,
-		const pixman_region32_t *damage, struct sway_container *con) {
+static void render_floating_container(struct render_context *ctx,
+		struct sway_container *con) {
 	if (con->view) {
 		struct sway_view *view = con->view;
 		struct border_colors *colors;
@@ -989,20 +979,19 @@ static void render_floating_container(struct sway_output *soutput,
 		}
 
 		if (con->current.border == B_NORMAL) {
-			render_titlebar(soutput, damage, con, floor(con->current.x),
+			render_titlebar(ctx, con, floor(con->current.x),
 					floor(con->current.y), con->current.width, colors,
 					title_texture, marks_texture);
 		} else if (con->current.border == B_PIXEL) {
-			render_top_border(soutput, damage, con, colors);
+			render_top_border(ctx, con, colors);
 		}
-		render_view(soutput, damage, con, colors);
+		render_view(ctx, con, colors);
 	} else {
-		render_container(soutput, damage, con, con->current.focused);
+		render_container(ctx, con, con->current.focused);
 	}
 }
 
-static void render_floating(struct sway_output *soutput,
-		const pixman_region32_t *damage) {
+static void render_floating(struct render_context *ctx) {
 	for (int i = 0; i < root->outputs->length; ++i) {
 		struct sway_output *output = root->outputs->items[i];
 		for (int j = 0; j < output->current.workspaces->length; ++j) {
@@ -1015,23 +1004,24 @@ static void render_floating(struct sway_output *soutput,
 				if (floater->current.fullscreen_mode != FULLSCREEN_NONE) {
 					continue;
 				}
-				render_floating_container(soutput, damage, floater);
+				render_floating_container(ctx, floater);
 			}
 		}
 	}
 }
 
-static void render_seatops(struct sway_output *output,
-		const pixman_region32_t *damage) {
+static void render_seatops(struct render_context *ctx) {
 	struct sway_seat *seat;
 	wl_list_for_each(seat, &server.input->seats, link) {
-		seatop_render(seat, output, damage);
+		seatop_render(seat, ctx);
 	}
 }
 
-void output_render(struct sway_output *output, pixman_region32_t *damage) {
-	struct wlr_output *wlr_output = output->wlr_output;
-	struct wlr_renderer *renderer = output->server->renderer;
+void output_render(struct render_context *ctx) {
+	struct wlr_output *wlr_output = ctx->output->wlr_output;
+	struct wlr_renderer *renderer = ctx->renderer;
+	struct sway_output *output = ctx->output;
+	const pixman_region32_t *damage = ctx->output_damage;
 
 	struct sway_workspace *workspace = output->current.active_workspace;
 	if (workspace == NULL) {
@@ -1047,12 +1037,6 @@ void output_render(struct sway_output *output, pixman_region32_t *damage) {
 		return;
 	}
 
-	if (debug.damage == DAMAGE_RERENDER) {
-		int width, height;
-		wlr_output_transformed_resolution(wlr_output, &width, &height);
-		pixman_region32_union_rect(damage, damage, 0, 0, width, height);
-	}
-
 	if (!pixman_region32_not_empty(damage)) {
 		// Output isn't damaged but needs buffer swap
 		goto renderer_end;
@@ -1077,8 +1061,8 @@ void output_render(struct sway_output *output, pixman_region32_t *damage) {
 
 		if (server.session_lock.lock != NULL) {
 			struct render_data data = {
-				.damage = damage,
 				.alpha = 1.0f,
+				.ctx = ctx,
 			};
 
 			struct wlr_session_lock_surface_v1 *lock_surface;
@@ -1113,13 +1097,12 @@ void output_render(struct sway_output *output, pixman_region32_t *damage) {
 
 		if (fullscreen_con->view) {
 			if (!wl_list_empty(&fullscreen_con->view->saved_buffers)) {
-				render_saved_view(fullscreen_con->view, output, damage, 1.0f);
+				render_saved_view(ctx, fullscreen_con->view, 1.0f);
 			} else if (fullscreen_con->view->surface) {
-				render_view_toplevels(fullscreen_con->view,
-						output, damage, 1.0f);
+				render_view_toplevels(ctx, fullscreen_con->view, 1.0f);
 			}
 		} else {
-			render_container(output, damage, fullscreen_con,
+			render_container(ctx, fullscreen_con,
 					fullscreen_con->current.focused);
 		}
 
@@ -1127,11 +1110,11 @@ void output_render(struct sway_output *output, pixman_region32_t *damage) {
 			struct sway_container *floater =
 				workspace->current.floating->items[i];
 			if (container_is_transient_for(floater, fullscreen_con)) {
-				render_floating_container(output, damage, floater);
+				render_floating_container(ctx, floater);
 			}
 		}
 #if HAVE_XWAYLAND
-		render_unmanaged(output, damage, &root->xwayland_unmanaged);
+		render_unmanaged(ctx, &root->xwayland_unmanaged);
 #endif
 	} else {
 		float clear_color[] = {0.25f, 0.25f, 0.25f, 1.0f};
@@ -1143,41 +1126,41 @@ void output_render(struct sway_output *output, pixman_region32_t *damage) {
 			wlr_renderer_clear(renderer, clear_color);
 		}
 
-		render_layer_toplevel(output, damage,
+		render_layer_toplevel(ctx,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
-		render_layer_toplevel(output, damage,
+		render_layer_toplevel(ctx,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
 
-		render_workspace(output, damage, workspace, workspace->current.focused);
-		render_floating(output, damage);
+		render_workspace(ctx, workspace, workspace->current.focused);
+		render_floating(ctx);
 #if HAVE_XWAYLAND
-		render_unmanaged(output, damage, &root->xwayland_unmanaged);
+		render_unmanaged(ctx, &root->xwayland_unmanaged);
 #endif
-		render_layer_toplevel(output, damage,
+		render_layer_toplevel(ctx,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
 
-		render_layer_popups(output, damage,
+		render_layer_popups(ctx,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
-		render_layer_popups(output, damage,
+		render_layer_popups(ctx,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
-		render_layer_popups(output, damage,
+		render_layer_popups(ctx,
 			&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
 	}
 
-	render_seatops(output, damage);
+	render_seatops(ctx);
 
 	struct sway_seat *seat = input_manager_current_seat();
 	struct sway_container *focus = seat_get_focused_container(seat);
 	if (focus && focus->view) {
-		render_view_popups(focus->view, output, damage, focus->alpha);
+		render_view_popups(ctx, focus->view, focus->alpha);
 	}
 
 render_overlay:
-	render_layer_toplevel(output, damage,
+	render_layer_toplevel(ctx,
 		&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
-	render_layer_popups(output, damage,
+	render_layer_popups(ctx,
 		&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
-	render_drag_icons(output, damage, &root->drag_icons);
+	render_drag_icons(ctx, &root->drag_icons);
 
 renderer_end:
 	wlr_renderer_scissor(renderer, NULL);
diff --git a/sway/input/seat.c b/sway/input/seat.c
index 14931ce0..6b95e46a 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -1726,10 +1726,9 @@ void seatop_end(struct sway_seat *seat) {
 	seat->seatop_impl = NULL;
 }
 
-void seatop_render(struct sway_seat *seat, struct sway_output *output,
-		const pixman_region32_t *damage) {
+void seatop_render(struct sway_seat *seat, struct render_context *ctx) {
 	if (seat->seatop_impl->render) {
-		seat->seatop_impl->render(seat, output, damage);
+		seat->seatop_impl->render(seat, ctx);
 	}
 }
 
diff --git a/sway/input/seatop_move_tiling.c b/sway/input/seatop_move_tiling.c
index 5498e909..26704d0d 100644
--- a/sway/input/seatop_move_tiling.c
+++ b/sway/input/seatop_move_tiling.c
@@ -31,21 +31,20 @@ struct seatop_move_tiling_event {
 	bool insert_after_target;
 };
 
-static void handle_render(struct sway_seat *seat,
-		struct sway_output *output, const pixman_region32_t *damage) {
+static void handle_render(struct sway_seat *seat, struct render_context *ctx) {
 	struct seatop_move_tiling_event *e = seat->seatop_data;
 	if (!e->threshold_reached) {
 		return;
 	}
-	if (e->target_node && node_get_output(e->target_node) == output) {
+	if (e->target_node && node_get_output(e->target_node) == ctx->output) {
 		float color[4];
 		memcpy(&color, config->border_colors.focused.indicator,
 				sizeof(float) * 4);
 		premultiply_alpha(color, 0.5);
 		struct wlr_box box;
 		memcpy(&box, &e->drop_box, sizeof(struct wlr_box));
-		scale_box(&box, output->wlr_output->scale);
-		render_rect(output, damage, &box, color);
+		scale_box(&box, ctx->output->wlr_output->scale);
+		render_rect(ctx, &box, color);
 	}
 }