render xdg surface

1 files changed, 112 insertions, 57 deletions

diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index 2b428c30..1e9a823a 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -1,4 +1,5 @@
 #define _POSIX_C_SOURCE 200809L
+#include <assert.h>
 #include <stdlib.h>
 #include <time.h>
 #include <wayland-server.h>
@@ -15,76 +16,131 @@
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
 
-static void output_frame_view(swayc_t *view, void *data) {
-        struct sway_output *output = data;
-        struct wlr_output *wlr_output = output->wlr_output;
-        struct sway_view *sway_view = view->sway_view;
-        struct wlr_surface *surface = sway_view->surface;
+/**
+ * Rotate a child's position relative to a parent. The parent size is (pw, ph),
+ * the child position is (*sx, *sy) and its size is (sw, sh).
+ */
+static void rotate_child_position(double *sx, double *sy, double sw, double sh,
+                double pw, double ph, float rotation) {
+        if (rotation != 0.0) {
+                // Coordinates relative to the center of the subsurface
+                double ox = *sx - pw/2 + sw/2,
+                        oy = *sy - ph/2 + sh/2;
+                // Rotated coordinates
+                double rx = cos(-rotation)*ox - sin(-rotation)*oy,
+                        ry = cos(-rotation)*oy + sin(-rotation)*ox;
+                *sx = rx + pw/2 - sw/2;
+                *sy = ry + ph/2 - sh/2;
+        }
+}
+
+static void render_surface(struct wlr_surface *surface,
+                struct wlr_output *wlr_output, struct timespec *when,
+                double lx, double ly, float rotation) {
         if (!wlr_surface_has_buffer(surface)) {
                 return;
         }
-        // TODO
-        // - Deal with wlr_output_layout
-        int width = sway_view->surface->current->width;
-        int height = sway_view->surface->current->height;
+        struct wlr_output_layout *layout = root_container.sway_root->output_layout;
+        int width = surface->current->width;
+        int height = surface->current->height;
         int render_width = width * wlr_output->scale;
         int render_height = height * wlr_output->scale;
-        double ox = view->x, oy = view->y;
-        // TODO
-        //wlr_output_layout_output_coords(desktop->layout, wlr_output, &ox, &oy);
+        double ox = lx, oy = ly;
+        wlr_output_layout_output_coords(layout, wlr_output, &ox, &oy);
         ox *= wlr_output->scale;
         oy *= wlr_output->scale;
-        // TODO
-        //if (wlr_output_layout_intersects(desktop->layout, wlr_output,
-        //              lx, ly, lx + render_width, ly + render_height)) {
-        //              return;
-        //}
-
-        // if the shell specifies window geometry, make the top left corner of the
-        // window in the top left corner of the container to avoid arbitrarily
-        // sized gaps based on the attached buffer size
-        int window_offset_x = 0;
-        int window_offset_y = 0;
-
-        if (view->sway_view->type == SWAY_XDG_SHELL_V6_VIEW) {
-                window_offset_x = view->sway_view->wlr_xdg_surface_v6->geometry->x;
-                window_offset_y = view->sway_view->wlr_xdg_surface_v6->geometry->y;
-        }
 
-        // TODO
-        double rotation = 0;
-        float matrix[16];
+        struct wlr_box render_box = {
+                .x = lx, .y = ly,
+                .width = render_width, .height = render_height,
+        };
+        if (wlr_output_layout_intersects(layout, wlr_output, &render_box)) {
+                float matrix[16];
 
-        float translate_origin[16];
-        wlr_matrix_translate(&translate_origin,
-                (int)ox + render_width / 2 - window_offset_x,
-                (int)oy + render_height / 2 - window_offset_y,
-                0);
+                float translate_center[16];
+                wlr_matrix_translate(&translate_center,
+                        (int)ox + render_width / 2, (int)oy + render_height / 2, 0);
 
-        float rotate[16];
-        wlr_matrix_rotate(&rotate, rotation);
+                float rotate[16];
+                wlr_matrix_rotate(&rotate, rotation);
 
-        float translate_center[16];
-        wlr_matrix_translate(&translate_center,
-                -render_width / 2,
-                -render_height / 2, 0);
+                float translate_origin[16];
+                wlr_matrix_translate(&translate_origin, -render_width / 2,
+                        -render_height / 2, 0);
 
-        float scale[16];
-        wlr_matrix_scale(&scale, render_width, render_height, 1);
+                float scale[16];
+                wlr_matrix_scale(&scale, render_width, render_height, 1);
 
-        float transform[16];
-        wlr_matrix_mul(&translate_origin, &rotate, &transform);
-        wlr_matrix_mul(&transform, &translate_center, &transform);
-        wlr_matrix_mul(&transform, &scale, &transform);
-        wlr_matrix_mul(&wlr_output->transform_matrix, &transform, &matrix);
+                float transform[16];
+                wlr_matrix_mul(&translate_center, &rotate, &transform);
+                wlr_matrix_mul(&transform, &translate_origin, &transform);
+                wlr_matrix_mul(&transform, &scale, &transform);
 
-        wlr_render_with_matrix(output->server->renderer, surface->texture, &matrix);
+                if (surface->current->transform != WL_OUTPUT_TRANSFORM_NORMAL) {
+                        float surface_translate_center[16];
+                        wlr_matrix_translate(&surface_translate_center, 0.5, 0.5, 0);
 
-        // TODO: move into wlroots
-        struct timespec now;
-        clock_gettime(CLOCK_MONOTONIC, &now);
+                        float surface_transform[16];
+                        wlr_matrix_transform(surface_transform,
+                                wlr_output_transform_invert(surface->current->transform));
+
+                        float surface_translate_origin[16];
+                        wlr_matrix_translate(&surface_translate_origin, -0.5, -0.5, 0);
+
+                        wlr_matrix_mul(&transform, &surface_translate_center,
+                                &transform);
+                        wlr_matrix_mul(&transform, &surface_transform, &transform);
+                        wlr_matrix_mul(&transform, &surface_translate_origin,
+                                &transform);
+                }
+
+                wlr_matrix_mul(&wlr_output->transform_matrix, &transform, &matrix);
+
+                wlr_render_with_matrix(server.renderer, surface->texture,
+                        &matrix);
+
+                wlr_surface_send_frame_done(surface, when);
+        }
 
-        wlr_surface_send_frame_done(surface, &now);
+        struct wlr_subsurface *subsurface;
+        wl_list_for_each(subsurface, &surface->subsurface_list, parent_link) {
+                struct wlr_surface_state *state = subsurface->surface->current;
+                double sx = state->subsurface_position.x;
+                double sy = state->subsurface_position.y;
+                double sw = state->buffer_width / state->scale;
+                double sh = state->buffer_height / state->scale;
+                rotate_child_position(&sx, &sy, sw, sh, width, height, rotation);
+
+                render_surface(subsurface->surface, wlr_output, when,
+                        lx + sx,
+                        ly + sy,
+                        rotation);
+        }
+}
+
+static void output_frame_view(swayc_t *view, void *data) {
+        struct sway_output *output = data;
+        struct wlr_output *wlr_output = output->wlr_output;
+        struct sway_view *sway_view = view->sway_view;
+        struct wlr_surface *surface = sway_view->surface;
+
+        switch (sway_view->type) {
+        case SWAY_XDG_SHELL_V6_VIEW: {
+                int window_offset_x = view->sway_view->wlr_xdg_surface_v6->geometry->x;
+                int window_offset_y = view->sway_view->wlr_xdg_surface_v6->geometry->y;
+                render_surface(surface, wlr_output, &output->last_frame,
+                        view->x - window_offset_x,
+                        view->y - window_offset_y,
+                        0);
+                break;
+        }
+        case SWAY_WL_SHELL_VIEW:
+                break;
+        case SWAY_XWAYLAND_VIEW:
+                break;
+        case SWAY_VIEW_TYPES:
+                break;
+        }
 }
 
 static void output_frame_notify(struct wl_listener *listener, void *data) {
@@ -92,9 +148,6 @@ static void output_frame_notify(struct wl_listener *listener, void *data) {
         struct wlr_output *wlr_output = data;
         struct sway_server *server = soutput->server;
 
-        struct timespec now;
-        clock_gettime(CLOCK_MONOTONIC, &now);
-
         wlr_output_make_current(wlr_output);
         wlr_renderer_begin(server->renderer, wlr_output);
 
@@ -104,6 +157,8 @@ static void output_frame_notify(struct wl_listener *listener, void *data) {
         wlr_renderer_end(server->renderer);
         wlr_output_swap_buffers(wlr_output);
 
+        struct timespec now;
+        clock_gettime(CLOCK_MONOTONIC, &now);
         soutput->last_frame = now;
 }