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	rootston: fix rotated views damage tracking
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					 2 changed files with 43 additions and 46 deletions
				
			
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			@ -553,31 +553,16 @@ static void damage_whole_surface(struct wlr_surface *surface,
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	wlr_output_transformed_resolution(output->wlr_output, &ow, &oh);
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	struct wlr_box box;
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	surface_intersect_output(surface, output->desktop->layout,
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	bool intersects = surface_intersect_output(surface, output->desktop->layout,
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		output->wlr_output, lx, ly, rotation, &box);
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	if (!intersects) {
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		return;
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	}
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	// Take the surface damage and damage the whole surface
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	// The surface damage is still useful in case the surface got resized
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	pixman_region32_t damage;
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	pixman_region32_init(&damage);
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	pixman_region32_copy(&damage, &surface->current->surface_damage);
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	wlr_region_scale(&damage, &damage, output->wlr_output->scale);
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	pixman_region32_union_rect(&damage, &damage, 0, 0, box.width, box.height);
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	pixman_region32_translate(&damage, box.x, box.y);
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	pixman_region32_intersect_rect(&damage, &damage, 0, 0, ow, oh);
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	pixman_box32_t *extents = pixman_region32_extents(&damage);
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	struct wlr_box extents_box = {
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		.x = extents->x1,
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		.y = extents->y1,
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		.width = extents->x2 - extents->x1,
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		.height = extents->y2 - extents->y1,
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	};
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	pixman_region32_fini(&damage);
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	wlr_box_rotated_bounds(&extents_box, -rotation, &extents_box);
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	wlr_box_rotated_bounds(&box, -rotation, &box);
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	pixman_region32_union_rect(&output->damage, &output->damage,
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		extents_box.x, extents_box.y, extents_box.width, extents_box.height);
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		box.x, box.y, box.width, box.height);
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	wlr_output_schedule_frame(output->wlr_output);
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}
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			@ -616,34 +601,51 @@ void output_damage_whole_drag_icon(struct roots_output *output,
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static void damage_from_surface(struct wlr_surface *surface,
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		double lx, double ly, float rotation, void *data) {
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	struct roots_output *output = data;
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	struct wlr_output *wlr_output = output->wlr_output;
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	if (!wlr_surface_has_buffer(surface)) {
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		return;
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	}
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	int ow, oh;
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	wlr_output_transformed_resolution(output->wlr_output, &ow, &oh);
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	wlr_output_transformed_resolution(wlr_output, &ow, &oh);
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	struct wlr_box box;
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	surface_intersect_output(surface, output->desktop->layout,
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		output->wlr_output, lx, ly, rotation, &box);
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		wlr_output, lx, ly, rotation, &box);
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	pixman_region32_t damage;
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	pixman_region32_init(&damage);
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	pixman_region32_copy(&damage, &surface->current->surface_damage);
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	wlr_region_scale(&damage, &damage, output->wlr_output->scale);
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	if (ceil(output->wlr_output->scale) > surface->current->scale) {
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		// When scaling up a surface, it'll become blurry so we need to expand
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		// the damage region
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		wlr_region_expand(&damage, &damage,
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			ceil(output->wlr_output->scale) - surface->current->scale);
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	if (rotation == 0) {
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		pixman_region32_t damage;
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		pixman_region32_init(&damage);
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		pixman_region32_copy(&damage, &surface->current->surface_damage);
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		wlr_region_scale(&damage, &damage, wlr_output->scale);
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		if (ceil(wlr_output->scale) > surface->current->scale) {
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			// When scaling up a surface, it'll become blurry so we need to
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			// expand the damage region
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			wlr_region_expand(&damage, &damage,
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				ceil(wlr_output->scale) - surface->current->scale);
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		}
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		pixman_region32_translate(&damage, box.x, box.y);
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		pixman_region32_union(&output->damage, &output->damage, &damage);
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		pixman_region32_fini(&damage);
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	} else {
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		pixman_box32_t *extents =
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			pixman_region32_extents(&surface->current->surface_damage);
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		struct wlr_box damage_box = {
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			.x = box.x + extents->x1 * wlr_output->scale,
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			.y = box.y + extents->y1 * wlr_output->scale,
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			.width = (extents->x2 - extents->x1) * wlr_output->scale,
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			.height = (extents->y2 - extents->y1) * wlr_output->scale,
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		};
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		wlr_box_rotated_bounds(&damage_box, -rotation, &damage_box);
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		pixman_region32_union_rect(&output->damage, &output->damage,
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			damage_box.x, damage_box.y, damage_box.width, damage_box.height);
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	}
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	pixman_region32_translate(&damage, box.x, box.y);
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	pixman_region32_intersect_rect(&damage, &damage, 0, 0, ow, oh);
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	pixman_region32_union(&output->damage, &output->damage, &damage);
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	pixman_region32_fini(&damage);
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	wlr_output_schedule_frame(output->wlr_output);
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	pixman_region32_intersect_rect(&output->damage, &output->damage, 0, 0,
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		ow, oh);
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	wlr_output_schedule_frame(wlr_output);
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}
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void output_damage_from_view(struct roots_output *output,
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			@ -652,11 +654,6 @@ void output_damage_from_view(struct roots_output *output,
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		return;
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	}
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	if (view->rotation != 0) {
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		output_damage_whole_view(output, view);
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		return;
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	}
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	view_for_each_surface(view, damage_from_surface, output);
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}
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			@ -138,8 +138,8 @@ void wlr_box_rotated_bounds(const struct wlr_box *box, float rotation,
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		(box->x + box->width - ox) * s +
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		(box->y + box->height - oy) * c;
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	dest->x = fmin(x1, x2);
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	dest->width = fmax(x1, x2) - fmin(x1, x2);
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	dest->y = fmin(y1, y2);
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	dest->height = fmax(y1, y2) - fmin(y1, y2);
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	dest->x = floor(fmin(x1, x2));
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	dest->width = ceil(fmax(x1, x2) - fmin(x1, x2));
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	dest->y = floor(fmin(y1, y2));
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	dest->height = ceil(fmax(y1, y2) - fmin(y1, y2));
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}
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