rootston: rotate views!
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a40d38798c
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9b88f25208
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@ -83,6 +83,7 @@ struct roots_input {
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struct roots_view *active_view;
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int offs_x, offs_y;
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int view_x, view_y, view_width, view_height;
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float view_rotation;
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uint32_t resize_edges;
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// Ring buffer of input events that could trigger move/resize/rotate
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@ -1,6 +1,7 @@
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include <math.h>
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// TODO: BSD et al
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#include <linux/input-event-codes.h>
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#include <wayland-server.h>
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@ -25,15 +26,16 @@ const struct roots_input_event *get_input_event(struct roots_input *input,
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void view_begin_move(struct roots_input *input, struct wlr_cursor *cursor,
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struct roots_view *view) {
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input->mode = ROOTS_CURSOR_MOVE;
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input->offs_x = cursor->x - view->x;
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input->offs_y = cursor->y - view->y;
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input->offs_x = cursor->x;
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input->offs_y = cursor->y;
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input->view_x = view->x;
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input->view_y = view->y;
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wlr_seat_pointer_clear_focus(input->wl_seat);
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}
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void view_begin_resize(struct roots_input *input, struct wlr_cursor *cursor,
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struct roots_view *view, uint32_t edges) {
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input->mode = ROOTS_CURSOR_RESIZE;
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wlr_log(L_DEBUG, "begin resize");
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input->offs_x = cursor->x;
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input->offs_y = cursor->y;
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input->view_x = view->x;
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@ -46,6 +48,15 @@ void view_begin_resize(struct roots_input *input, struct wlr_cursor *cursor,
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wlr_seat_pointer_clear_focus(input->wl_seat);
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}
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void view_begin_rotate(struct roots_input *input, struct wlr_cursor *cursor,
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struct roots_view *view) {
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input->mode = ROOTS_CURSOR_ROTATE;
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input->offs_x = cursor->x;
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input->offs_y = cursor->y;
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input->view_rotation = view->rotation;
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wlr_seat_pointer_clear_focus(input->wl_seat);
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}
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void cursor_update_position(struct roots_input *input, uint32_t time) {
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struct roots_desktop *desktop = input->server->desktop;
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struct roots_view *view;
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@ -64,16 +75,18 @@ void cursor_update_position(struct roots_input *input, uint32_t time) {
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break;
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case ROOTS_CURSOR_MOVE:
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if (input->active_view) {
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input->active_view->x = input->cursor->x - input->offs_x;
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input->active_view->y = input->cursor->y - input->offs_y;
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int dx = input->cursor->x - input->offs_x,
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dy = input->cursor->y - input->offs_y;
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input->active_view->x = input->view_x + dx;
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input->active_view->y = input->view_y + dy;
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}
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break;
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case ROOTS_CURSOR_RESIZE:
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if (input->active_view) {
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int dx = input->cursor->x - input->offs_x;
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int dy = input->cursor->y - input->offs_y;
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int width = input->view_width;
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int height = input->view_height;
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int dx = input->cursor->x - input->offs_x,
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dy = input->cursor->y - input->offs_y;
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int width = input->view_width,
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height = input->view_height;
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if (input->resize_edges & ROOTS_CURSOR_RESIZE_EDGE_TOP) {
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input->active_view->y = input->view_y + dy;
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height -= dy;
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@ -92,6 +105,17 @@ void cursor_update_position(struct roots_input *input, uint32_t time) {
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}
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break;
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case ROOTS_CURSOR_ROTATE:
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if (input->active_view) {
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struct roots_view *view = input->active_view;
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int ox = view->x + view->wlr_surface->current->width/2,
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oy = view->y + view->wlr_surface->current->height/2;
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int ux = input->offs_x - ox,
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uy = input->offs_y - oy;
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int vx = input->cursor->x - ox,
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vy = input->cursor->y - oy;
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float angle = atan2(vx*uy - vy*ux, vx*ux + vy*uy);
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view->rotation = input->view_rotation + angle;
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}
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break;
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}
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}
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@ -175,6 +199,8 @@ static void do_cursor_button_press(struct roots_input *input,
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ROOTS_CURSOR_RESIZE_EDGE_RIGHT |
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ROOTS_CURSOR_RESIZE_EDGE_BOTTOM);
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break;
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case BTN_MIDDLE:
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view_begin_rotate(input, cursor, view);
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}
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return;
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}
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@ -18,7 +18,7 @@ static inline int64_t timespec_to_msec(const struct timespec *a) {
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static void render_surface(struct wlr_surface *surface,
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struct roots_desktop *desktop, struct wlr_output *wlr_output,
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struct timespec *when, double lx, double ly) {
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struct timespec *when, double lx, double ly, float rotation) {
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wlr_surface_flush_damage(surface);
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if (surface->texture->valid) {
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int width = surface->current->buffer_width;
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@ -29,8 +29,18 @@ static void render_surface(struct wlr_surface *surface,
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if (wlr_output_layout_intersects(desktop->layout, wlr_output,
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lx, ly, lx + width, ly + height)) {
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float matrix[16];
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float translate_origin[16];
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wlr_matrix_translate(&translate_origin,
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ox + width/2, oy + height/2, 0);
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float rotate[16];
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wlr_matrix_rotate(&rotate, rotation);
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float translate_center[16];
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wlr_matrix_translate(&translate_center, -width/2, -height/2, 0);
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float transform[16];
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wlr_matrix_translate(&transform, ox, oy, 0);
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wlr_matrix_mul(&translate_origin, &rotate, &transform);
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wlr_matrix_mul(&transform, &translate_center, &transform);
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wlr_surface_get_matrix(surface, &matrix,
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&wlr_output->transform_matrix, &transform);
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wlr_render_with_matrix(desktop->server->renderer,
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@ -48,7 +58,8 @@ static void render_surface(struct wlr_surface *surface,
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wl_list_for_each(subsurface, &surface->subsurface_list, parent_link) {
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render_surface(subsurface->surface, desktop, wlr_output, when,
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lx + subsurface->surface->current->subsurface_position.x,
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ly + subsurface->surface->current->subsurface_position.y);
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ly + subsurface->surface->current->subsurface_position.y,
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rotation);
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}
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}
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}
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@ -56,7 +67,7 @@ static void render_surface(struct wlr_surface *surface,
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static void render_view(struct roots_view *view, struct roots_desktop *desktop,
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struct wlr_output *wlr_output, struct timespec *when) {
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render_surface(view->wlr_surface, desktop, wlr_output, when,
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view->x, view->y);
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view->x, view->y, view->rotation);
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}
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static void output_frame_notify(struct wl_listener *listener, void *data) {
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