Signed-off-by: Jason Ekstrand <ja...@jlekstrand.net>
---
 Makefile.am             |  12 +
 clients/simple-damage.c | 869 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 881 insertions(+)
 create mode 100644 clients/simple-damage.c

diff --git a/Makefile.am b/Makefile.am
index c2df8b6..eb05a47 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -386,6 +386,7 @@ endif
 if BUILD_SIMPLE_CLIENTS
 demo_clients +=                                        \
        weston-simple-shm                       \
+       weston-simple-damage                    \
        weston-simple-touch                     \
        weston-multi-resource
 
@@ -398,6 +399,17 @@ nodist_weston_simple_shm_SOURCES =         \
 weston_simple_shm_CFLAGS = $(AM_CFLAGS) $(SIMPLE_CLIENT_CFLAGS)
 weston_simple_shm_LDADD = $(SIMPLE_CLIENT_LIBS) libshared.la
 
+weston_simple_damage_SOURCES = clients/simple-damage.c
+nodist_weston_simple_damage_SOURCES =          \
+       protocol/scaler-protocol.c              \
+       protocol/scaler-client-protocol.h       \
+       protocol/xdg-shell-protocol.c           \
+       protocol/xdg-shell-client-protocol.h    \
+       protocol/fullscreen-shell-protocol.c    \
+       protocol/fullscreen-shell-client-protocol.h
+weston_simple_damage_CFLAGS = $(AM_CFLAGS) $(SIMPLE_CLIENT_CFLAGS)
+weston_simple_damage_LDADD = $(SIMPLE_CLIENT_LIBS) libshared.la
+
 weston_simple_touch_SOURCES = clients/simple-touch.c
 weston_simple_touch_CFLAGS = $(AM_CFLAGS) $(SIMPLE_CLIENT_CFLAGS)
 weston_simple_touch_LDADD = $(SIMPLE_CLIENT_LIBS) libshared.la
diff --git a/clients/simple-damage.c b/clients/simple-damage.c
new file mode 100644
index 0000000..35f3a6f
--- /dev/null
+++ b/clients/simple-damage.c
@@ -0,0 +1,869 @@
+/*
+ * Copyright © 2014 Jason Ekstrand
+ * Copyright © 2011 Benjamin Franzke
+ * Copyright © 2010 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <signal.h>
+
+#include <wayland-client.h>
+#include "../shared/os-compatibility.h"
+#include "xdg-shell-client-protocol.h"
+#include "fullscreen-shell-client-protocol.h"
+#include "scaler-client-protocol.h"
+
+int print_debug = 0;
+
+struct display {
+       struct wl_display *display;
+       struct wl_registry *registry;
+       int target_version;
+       struct wl_compositor *compositor;
+       struct wl_scaler *scaler;
+       struct xdg_shell *shell;
+       struct _wl_fullscreen_shell *fshell;
+       struct wl_shm *shm;
+       uint32_t formats;
+};
+
+struct buffer {
+       struct wl_buffer *buffer;
+       uint32_t *shm_data;
+       int busy;
+};
+
+struct window {
+       struct display *display;
+       int width, height, border;
+       struct wl_surface *surface;
+       struct wl_viewport *viewport;
+       struct xdg_surface *xdg_surface;
+       struct wl_callback *callback;
+       struct buffer buffers[2];
+       struct buffer *prev_buffer;
+
+       int scale;
+       enum wl_output_transform transform;
+
+       struct {
+               float x, y; /* position in pixels */
+               float dx, dy; /* velocity in pixels/second */
+               int radius; /* radius in pixels */
+               uint32_t prev_time;
+       } ball;
+};
+
+static int running = 1;
+
+static void
+buffer_release(void *data, struct wl_buffer *buffer)
+{
+       struct buffer *mybuf = data;
+
+       mybuf->busy = 0;
+}
+
+static const struct wl_buffer_listener buffer_listener = {
+       buffer_release
+};
+
+static int
+create_shm_buffer(struct display *display, struct buffer *buffer,
+                 int width, int height, uint32_t format)
+{
+       struct wl_shm_pool *pool;
+       int fd, size, stride;
+       void *data;
+
+       stride = width * 4;
+       size = stride * height;
+
+       fd = os_create_anonymous_file(size);
+       if (fd < 0) {
+               fprintf(stderr, "creating a buffer file for %d B failed: %m\n",
+                       size);
+               return -1;
+       }
+
+       data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+       if (data == MAP_FAILED) {
+               fprintf(stderr, "mmap failed: %m\n");
+               close(fd);
+               return -1;
+       }
+
+       pool = wl_shm_create_pool(display->shm, fd, size);
+       buffer->buffer = wl_shm_pool_create_buffer(pool, 0,
+                                                  width, height,
+                                                  stride, format);
+       wl_buffer_add_listener(buffer->buffer, &buffer_listener, buffer);
+       wl_shm_pool_destroy(pool);
+       close(fd);
+
+       buffer->shm_data = data;
+
+       return 0;
+}
+
+static void
+handle_configure(void *data, struct xdg_surface *surface,
+                int32_t width, int32_t height)
+{
+}
+
+static void
+handle_change_state(void *data, struct xdg_surface *xdg_surface,
+                   uint32_t state,
+                   uint32_t value,
+                   uint32_t serial)
+{
+}
+
+static void
+handle_activated(void *data, struct xdg_surface *xdg_surface)
+{
+}
+
+static void
+handle_deactivated(void *data, struct xdg_surface *xdg_surface)
+{
+}
+
+static void
+handle_delete(void *data, struct xdg_surface *xdg_surface)
+{
+       running = 0;
+}
+
+static const struct xdg_surface_listener xdg_surface_listener = {
+       handle_configure,
+       handle_change_state,
+       handle_activated,
+       handle_deactivated,
+       handle_delete,
+};
+
+static float
+bounded_randf(float a, float b)
+{
+       return a + ((float)rand() / (float)RAND_MAX) * (b - a);
+}
+
+static void
+window_init_game(struct window *window)
+{
+       int ax1, ay1, ax2, ay2; /* playable arena size */
+       struct timeval tv;
+
+       gettimeofday(&tv, NULL);
+       srand(tv.tv_usec);
+
+       ax1 = window->border + window->ball.radius;
+       ay1 = window->border + window->ball.radius;
+       ax2 = window->width - window->border - window->ball.radius;
+       ay2 = window->height - window->border - window->ball.radius;
+
+       window->ball.radius = 10;
+       window->ball.x = bounded_randf(ax1, ax2);
+       window->ball.y = bounded_randf(ay1, ay2);
+
+       window->ball.dx = bounded_randf(0, window->width);
+       window->ball.dy = bounded_randf(0, window->height);
+
+       window->ball.prev_time = 0;
+}
+
+static void
+window_advance_game(struct window *window, uint32_t timestamp)
+{
+       int ax1, ay1, ax2, ay2; /* Arena size */
+       float dt;
+
+       if (window->ball.prev_time == 0) {
+               /* first pass, don't do anything */
+               window->ball.prev_time = timestamp;
+               return;
+       }
+
+       /* dt in seconds */
+       dt = (float)(timestamp - window->ball.prev_time) / 1000.0f;
+
+       ax1 = window->border + window->ball.radius;
+       ay1 = window->border + window->ball.radius;
+       ax2 = window->width - window->border - window->ball.radius;
+       ay2 = window->height - window->border - window->ball.radius;
+
+       window->ball.x += window->ball.dx * dt;
+       while (window->ball.x < ax1 || ax2 < window->ball.x) {
+               if (window->ball.x < ax1)
+                       window->ball.x = 2 * ax1 - window->ball.x;
+               if (ax2 <= window->ball.x)
+                       window->ball.x = 2 * ax2 - window->ball.x;
+
+               window->ball.dx *= -1.0f;
+       }
+
+       window->ball.y += window->ball.dy * dt;
+       while (window->ball.y < ay1 || ay2 < window->ball.y) {
+               if (window->ball.y < ay1)
+                       window->ball.y = 2 * ay1 - window->ball.y;
+               if (ay2 <= window->ball.y)
+                       window->ball.y = 2 * ay2 - window->ball.y;
+
+               window->ball.dy *= -1.0f;
+       }
+
+       window->ball.prev_time = timestamp;
+}
+
+static struct window *
+create_window(struct display *display, int width, int height,
+             enum wl_output_transform transform, int scale, int use_viewport)
+{
+       struct window *window;
+
+       if (wl_compositor_get_version(display->compositor) < 2 &&
+           transform != WL_OUTPUT_TRANSFORM_NORMAL) {
+               fprintf(stderr, "wl_surface.buffer_transform unsupported in "
+                               "wl_surface version %d\n",
+                       wl_compositor_get_version(display->compositor));
+               exit(1);
+       }
+       
+       if (wl_compositor_get_version(display->compositor) < 3 &&
+           (! use_viewport) && scale != 1) {
+               fprintf(stderr, "wl_surface.buffer_scale unsupported in "
+                               "wl_surface version %d\n",
+                       wl_compositor_get_version(display->compositor));
+               exit(1);
+       }
+
+       if (display->scaler == NULL && use_viewport) {
+               fprintf(stderr, "Compositor does not support wl_viewport");
+               exit(1);
+       }
+
+       window = calloc(1, sizeof *window);
+       if (!window)
+               return NULL;
+
+       window->callback = NULL;
+       window->display = display;
+       window->width = width;
+       window->height = height;
+       window->border = 10;
+       window->transform = transform;
+       window->scale = scale;
+
+       window_init_game(window);
+
+       window->surface = wl_compositor_create_surface(display->compositor);
+
+       if (use_viewport)
+               window->viewport = wl_scaler_get_viewport(display->scaler,
+                                                         window->surface);
+
+       if (display->shell) {
+               window->xdg_surface =
+                       xdg_shell_get_xdg_surface(display->shell,
+                                                 window->surface);
+
+               assert(window->xdg_surface);
+
+               xdg_surface_add_listener(window->xdg_surface,
+                                        &xdg_surface_listener, window);
+
+               xdg_surface_set_title(window->xdg_surface, "simple-damage");
+       } else if (display->fshell) {
+               _wl_fullscreen_shell_present_surface(display->fshell,
+                                                    window->surface,
+                                                    
_WL_FULLSCREEN_SHELL_PRESENT_METHOD_DEFAULT,
+                                                    NULL);
+       } else {
+               assert(0);
+       }
+
+       /* Initialise damage to full surface, so the padding gets painted */
+       wl_surface_damage(window->surface, 0, 0, INT32_MAX, INT32_MAX);
+
+       return window;
+}
+
+static void
+destroy_window(struct window *window)
+{
+       if (window->callback)
+               wl_callback_destroy(window->callback);
+
+       if (window->buffers[0].buffer)
+               wl_buffer_destroy(window->buffers[0].buffer);
+       if (window->buffers[1].buffer)
+               wl_buffer_destroy(window->buffers[1].buffer);
+
+       if (window->xdg_surface)
+               xdg_surface_destroy(window->xdg_surface);
+       if (window->viewport)
+               wl_viewport_destroy(window->viewport);
+       wl_surface_destroy(window->surface);
+       free(window);
+}
+
+static struct buffer *
+window_next_buffer(struct window *window)
+{
+       struct buffer *buffer;
+       int ret = 0, bwidth, bheight;
+
+       if (!window->buffers[0].busy)
+               buffer = &window->buffers[0];
+       else if (!window->buffers[1].busy)
+               buffer = &window->buffers[1];
+       else
+               return NULL;
+
+       switch (window->transform) {
+       case WL_OUTPUT_TRANSFORM_NORMAL:
+       case WL_OUTPUT_TRANSFORM_180:
+       case WL_OUTPUT_TRANSFORM_FLIPPED:
+       case WL_OUTPUT_TRANSFORM_FLIPPED_180:
+               bwidth = window->width * window->scale;
+               bheight = window->height * window->scale;
+               break;
+       case WL_OUTPUT_TRANSFORM_90:
+       case WL_OUTPUT_TRANSFORM_270:
+       case WL_OUTPUT_TRANSFORM_FLIPPED_90:
+       case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+               bwidth = window->height * window->scale;
+               bheight = window->width * window->scale;
+               break;
+       }
+
+       /* If we're using a viewport, we make it double-size and crop */
+       if (window->viewport) {
+               bwidth *= 2;
+               bheight *= 2;
+       }
+
+       if (!buffer->buffer) {
+               ret = create_shm_buffer(window->display, buffer,
+                                       bwidth, bheight,
+                                       WL_SHM_FORMAT_ARGB8888);
+
+               if (ret < 0)
+                       return NULL;
+       }
+
+       return buffer;
+}
+
+static void
+paint_box(uint32_t *pixels, int stride, int x, int y, int width, int height,
+         uint32_t color)
+{
+       int i, j;
+
+       for (j = y; j < y + height; ++j)
+               for (i = x; i < x + width; ++i)
+                       pixels[i + j * stride] = color;
+}
+
+static void
+paint_circle(uint32_t *pixels, int stride, float x, float y, int radius,
+            uint32_t color)
+{
+       int i, j;
+
+       for (j = y - radius; j <= (int)(y + radius); ++j)
+               for (i = x - radius; i <= (int)(x + radius); ++i)
+                       if ((j+0.5f-y)*(j+0.5f-y) + (i+0.5f-x)*(i+0.5f-x) <= 
radius * radius)
+                               pixels[i + j * stride] = color;
+}
+
+static void
+window_get_transformed_ball(struct window *window, float *bx, float *by)
+{
+       float wx, wy;
+
+       wx = window->ball.x;
+       wy = window->ball.y;
+
+       switch (window->transform) {
+       case WL_OUTPUT_TRANSFORM_NORMAL:
+               *bx = wx;
+               *by = wy;
+               break;
+       case WL_OUTPUT_TRANSFORM_90:
+               *bx = window->height - wy;
+               *by = wx;
+               break;
+       case WL_OUTPUT_TRANSFORM_180:
+               *bx = window->width - wx;
+               *by = window->height - wy;
+               break;
+       case WL_OUTPUT_TRANSFORM_270:
+               *bx = wy;
+               *by = window->width - wx;
+               break;
+       case WL_OUTPUT_TRANSFORM_FLIPPED:
+               *bx = window->width - wx;
+               *by = wy;
+               break;
+       case WL_OUTPUT_TRANSFORM_FLIPPED_90:
+               *bx = window->height - wy;
+               *by = window->width - wx;
+               break;
+       case WL_OUTPUT_TRANSFORM_FLIPPED_180:
+               *bx = wx;
+               *by = window->height - wy;
+               break;
+       case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+               *bx = wy;
+               *by = wx;
+               break;
+       }
+
+       *bx *= window->scale;
+       *by *= window->scale;
+}
+
+static const struct wl_callback_listener frame_listener;
+
+static void
+redraw(void *data, struct wl_callback *callback, uint32_t time)
+{
+       struct window *window = data;
+       struct buffer *buffer;
+       int bwidth, bheight, bborder, bstride;
+       uint32_t *buffer_data;
+       float bx, by;
+
+       buffer = window_next_buffer(window);
+       if (!buffer) {
+               fprintf(stderr,
+                       !callback ? "Failed to create the first buffer.\n" :
+                       "Both buffers busy at redraw(). Server bug?\n");
+               abort();
+       }
+
+       switch (window->transform) {
+       case WL_OUTPUT_TRANSFORM_NORMAL:
+       case WL_OUTPUT_TRANSFORM_180:
+       case WL_OUTPUT_TRANSFORM_FLIPPED:
+       case WL_OUTPUT_TRANSFORM_FLIPPED_180:
+               bwidth = window->width * window->scale;
+               bheight = window->height * window->scale;
+               break;
+       case WL_OUTPUT_TRANSFORM_90:
+       case WL_OUTPUT_TRANSFORM_270:
+       case WL_OUTPUT_TRANSFORM_FLIPPED_90:
+       case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+               bwidth = window->height * window->scale;
+               bheight = window->width * window->scale;
+               break;
+       }
+
+       if (window->viewport) {
+               /* The buffer is actually twice as big.  We'll crop it down
+                * to size */
+               bstride = bwidth * 2;
+               buffer_data = buffer->shm_data;
+
+               switch (window->transform) {
+               case WL_OUTPUT_TRANSFORM_NORMAL:
+               case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+                       buffer_data += (bheight / 3) * bstride +
+                                      (bwidth / 3);
+                       break;
+               case WL_OUTPUT_TRANSFORM_90:
+               case WL_OUTPUT_TRANSFORM_FLIPPED:
+                       buffer_data += (bheight / 3) * bstride +
+                                      (bwidth - bwidth / 3);
+                       break;
+               case WL_OUTPUT_TRANSFORM_180:
+               case WL_OUTPUT_TRANSFORM_FLIPPED_90:
+                       buffer_data += (bheight - bheight / 3) * bstride +
+                                      (bwidth - bwidth / 3);
+                       break;
+               case WL_OUTPUT_TRANSFORM_270:
+               case WL_OUTPUT_TRANSFORM_FLIPPED_180:
+                       buffer_data += (bheight - bheight / 3) * bstride +
+                                      (bwidth / 3);
+                       break;
+               }
+
+               wl_viewport_set_source(window->viewport,
+                                      wl_fixed_from_int(window->width * 
window->scale / 3),
+                                      wl_fixed_from_int(window->height * 
window->scale / 3),
+                                      wl_fixed_from_int(window->width * 
window->scale),
+                                      wl_fixed_from_int(window->height * 
window->scale));
+
+               /* Fill the whole thing with red to detect viewport errors */
+               paint_box(buffer->shm_data, bstride,
+                         0, 0, bwidth * 2, bheight * 2, 0xffff0000);
+       } else {
+               bstride = bwidth;
+               buffer_data = buffer->shm_data;
+       }
+
+       bborder = window->border * window->scale;
+
+       /* Paint the border */
+       paint_box(buffer_data, bstride, 0, 0, bwidth, bborder, 0xffffffff);
+       paint_box(buffer_data, bstride, 0, 0, bborder, bheight, 0xffffffff);
+       paint_box(buffer_data, bstride,
+                 bwidth - bborder, 0, bborder, bheight, 0xffffffff);
+       paint_box(buffer_data, bstride,
+                 0, bheight - bborder, bwidth, bborder, 0xffffffff);
+
+       /* fill with translucent */
+       paint_box(buffer_data, bstride, bborder, bborder,
+                 bwidth - 2 * bborder, bheight - 2 * bborder, 0x80000000);
+       
+       /* Damage where the ball was */
+       wl_surface_damage(window->surface,
+                         window->ball.x - window->ball.radius,
+                         window->ball.y - window->ball.radius,
+                         window->ball.radius * 2 + 1,
+                         window->ball.radius * 2 + 1);
+
+       window_advance_game(window, time);
+
+       window_get_transformed_ball(window, &bx, &by);
+
+       /* Paint the ball */
+       paint_circle(buffer_data, bstride, bx, by,
+                    window->ball.radius * window->scale, 0xff00ff00);
+
+       if (print_debug) {
+               printf("Ball now located at (%f, %f)\n",
+                      window->ball.x, window->ball.y);
+               
+               printf("Circle painted at (%f, %f), radius %d\n", bx, by,
+                      window->ball.radius * window->scale);
+
+               printf("Buffer damage rectangle: (%d, %d) @ %dx%d\n",
+                      (int)(bx - window->ball.radius * window->scale),
+                      (int)(by - window->ball.radius * window->scale),
+                      window->ball.radius * window->scale * 2 + 1,
+                      window->ball.radius * window->scale * 2 + 1);
+       }
+
+       /* Damage where the ball is now */
+       wl_surface_damage(window->surface,
+                         window->ball.x - window->ball.radius,
+                         window->ball.y - window->ball.radius,
+                         window->ball.radius * 2 + 1,
+                         window->ball.radius * 2 + 1);
+
+       wl_surface_attach(window->surface, buffer->buffer, 0, 0);
+
+       if (wl_surface_get_version(window->surface) >= 2 &&
+           window->transform != WL_OUTPUT_TRANSFORM_NORMAL)
+               wl_surface_set_buffer_transform(window->surface,
+                                               window->transform);
+
+       if (window->scale != 1) {
+               if (window->viewport) {
+                       wl_viewport_set_destination(window->viewport,
+                                                   window->width,
+                                                   window->height);
+               } else {
+                       wl_surface_set_buffer_scale(window->surface,
+                                                   window->scale);
+               }
+       }
+
+       if (callback)
+               wl_callback_destroy(callback);
+
+       window->callback = wl_surface_frame(window->surface);
+       wl_callback_add_listener(window->callback, &frame_listener, window);
+       wl_surface_commit(window->surface);
+       buffer->busy = 1;
+}
+
+static const struct wl_callback_listener frame_listener = {
+       redraw
+};
+
+static void
+shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
+{
+       struct display *d = data;
+
+       d->formats |= (1 << format);
+}
+
+struct wl_shm_listener shm_listener = {
+       shm_format
+};
+
+static void
+xdg_shell_ping(void *data, struct xdg_shell *shell, uint32_t serial)
+{
+       xdg_shell_pong(shell, serial);
+}
+
+static const struct xdg_shell_listener xdg_shell_listener = {
+       xdg_shell_ping,
+};
+
+#define XDG_VERSION 3 /* The version of xdg-shell that we implement */
+#ifdef static_assert
+static_assert(XDG_VERSION == XDG_SHELL_VERSION_CURRENT,
+             "Interface version doesn't match implementation version");
+#endif
+
+static void
+registry_handle_global(void *data, struct wl_registry *registry,
+                      uint32_t id, const char *interface, uint32_t version)
+{
+       struct display *d = data;
+
+       if (strcmp(interface, "wl_compositor") == 0) {
+               if (d->target_version > (int)version) {
+                       fprintf(stderr, "Compositor does not support "
+                               "wl_surface version %d\n", d->target_version);
+                       exit(1);
+               }
+
+               if (d->target_version > 0)
+                       version = d->target_version;
+
+               d->compositor =
+                       wl_registry_bind(registry,
+                                        id, &wl_compositor_interface, version);
+       } else if (strcmp(interface, "wl_scaler") == 0 && version >= 2) {
+               d->scaler = wl_registry_bind(registry,
+                                            id, &wl_scaler_interface, 2);
+       } else if (strcmp(interface, "xdg_shell") == 0) {
+               d->shell = wl_registry_bind(registry,
+                                           id, &xdg_shell_interface, 1);
+               xdg_shell_use_unstable_version(d->shell, XDG_VERSION);
+               xdg_shell_add_listener(d->shell, &xdg_shell_listener, d);
+       } else if (strcmp(interface, "_wl_fullscreen_shell") == 0) {
+               d->fshell = wl_registry_bind(registry,
+                                            id, 
&_wl_fullscreen_shell_interface, 1);
+       } else if (strcmp(interface, "wl_shm") == 0) {
+               d->shm = wl_registry_bind(registry,
+                                         id, &wl_shm_interface, 1);
+               wl_shm_add_listener(d->shm, &shm_listener, d);
+       }
+}
+
+static void
+registry_handle_global_remove(void *data, struct wl_registry *registry,
+                             uint32_t name)
+{
+}
+
+static const struct wl_registry_listener registry_listener = {
+       registry_handle_global,
+       registry_handle_global_remove
+};
+
+static struct display *
+create_display(int version)
+{
+       struct display *display;
+
+       display = malloc(sizeof *display);
+       if (display == NULL) {
+               fprintf(stderr, "out of memory\n");
+               exit(1);
+       }
+       display->display = wl_display_connect(NULL);
+       assert(display->display);
+
+       display->target_version = version;
+       display->formats = 0;
+       display->registry = wl_display_get_registry(display->display);
+       wl_registry_add_listener(display->registry,
+                                &registry_listener, display);
+       wl_display_roundtrip(display->display);
+       if (display->shm == NULL) {
+               fprintf(stderr, "No wl_shm global\n");
+               exit(1);
+       }
+
+       wl_display_roundtrip(display->display);
+
+       if (!(display->formats & (1 << WL_SHM_FORMAT_XRGB8888))) {
+               fprintf(stderr, "WL_SHM_FORMAT_XRGB32 not available\n");
+               exit(1);
+       }
+
+       return display;
+}
+
+static void
+destroy_display(struct display *display)
+{
+       if (display->shm)
+               wl_shm_destroy(display->shm);
+
+       if (display->shell)
+               xdg_shell_destroy(display->shell);
+
+       if (display->fshell)
+               _wl_fullscreen_shell_release(display->fshell);
+       
+       if (display->scaler)
+               wl_scaler_destroy(display->scaler);
+
+       if (display->compositor)
+               wl_compositor_destroy(display->compositor);
+
+       wl_registry_destroy(display->registry);
+       wl_display_flush(display->display);
+       wl_display_disconnect(display->display);
+       free(display);
+}
+
+static void
+signal_int(int signum)
+{
+       running = 0;
+}
+
+static void
+print_usage(int retval)
+{
+       printf(
+               "usage: weston-simple-damage [options]\n\n"
+               "options:\n"
+               "  -h, --help\t\tPring this help\n"
+               "  --verbose\t\tPrint verbose log information\n"
+               "  --version=VERSION\tVersion of wl_surface to use\n"
+               "  --width=WIDTH\t\tWidth of the X window\n"
+               "  --height=HEIGHT\tHeight of the X window\n"
+               "  --scale=SCALE\t\tScale factor for the surface\n"
+               "  --transform=TRANSFORM\tTransform for the surface\n"
+               "  --viewport\t\tUse wl_viewport\n"
+       );
+
+       exit(retval);
+}
+
+static int
+parse_transform(const char *str, enum wl_output_transform *transform)
+{
+       int i;
+       static const struct {
+               const char *name;
+               enum wl_output_transform transform;
+       } names[] = {
+               { "normal",     WL_OUTPUT_TRANSFORM_NORMAL },
+               { "90",         WL_OUTPUT_TRANSFORM_90 },
+               { "180",        WL_OUTPUT_TRANSFORM_180 },
+               { "270",        WL_OUTPUT_TRANSFORM_270 },
+               { "flipped",    WL_OUTPUT_TRANSFORM_FLIPPED },
+               { "flipped-90", WL_OUTPUT_TRANSFORM_FLIPPED_90 },
+               { "flipped-180", WL_OUTPUT_TRANSFORM_FLIPPED_180 },
+               { "flipped-270", WL_OUTPUT_TRANSFORM_FLIPPED_270 },
+       };
+
+       for (i = 0; i < 8; i++) {
+               if (strcmp(names[i].name, str) == 0) {
+                       *transform = names[i].transform;
+                       return 1;
+               }
+       }
+
+       return 0;
+}
+
+int
+main(int argc, char **argv)
+{
+       struct sigaction sigint;
+       struct display *display;
+       struct window *window;
+       int i, ret = 0;
+       int version = 0;
+       int width = 300, height = 200, scale = 1, use_viewport = 0;
+       enum wl_output_transform transform = WL_OUTPUT_TRANSFORM_NORMAL;
+
+       for (i = 1; i < argc; ++i) {
+               if (strcmp(argv[i], "--help") == 0 ||
+                   strcmp(argv[i], "-h") == 0) {
+                       print_usage(0);
+               } else if (sscanf(argv[i], "--version=%d", &version) > 0) {
+                       if (version < 1 || version > 3) {
+                               fprintf(stderr, "Unsupported wl_surface 
version: %d\n",
+                                       version);
+                               return 1;
+                       }
+                       continue;
+               } else if (strcmp(argv[i], "--verbose") == 0) {
+                       print_debug = 1;
+                       continue;
+               } else if (sscanf(argv[i], "--width=%d", &width) > 0) {
+                       continue;
+               } else if (sscanf(argv[i], "--height=%d", &height) > 0) {
+                       continue;
+               } else if (strncmp(argv[i], "--transform=", 12) == 0 &&
+                          parse_transform(argv[i] + 12, &transform) > 0) {
+                       continue;
+               } else if (sscanf(argv[i], "--scale=%d", &scale) > 0) {
+                       continue;
+               } else if (strcmp(argv[i], "--use-viewport") == 0) {
+                       use_viewport = 1;
+                       continue;
+               } else {
+                       printf("Invalid option: %s\n", argv[i]);
+                       print_usage(255);
+               }
+       }
+
+       display = create_display(version);
+
+       window = create_window(display, width, height, transform, scale,
+                              use_viewport);
+       if (!window)
+               return 1;
+
+       sigint.sa_handler = signal_int;
+       sigemptyset(&sigint.sa_mask);
+       sigint.sa_flags = SA_RESETHAND;
+       sigaction(SIGINT, &sigint, NULL);
+
+       redraw(window, NULL, 0);
+
+       while (running && ret != -1)
+               ret = wl_display_dispatch(display->display);
+
+       fprintf(stderr, "simple-shm exiting\n");
+       destroy_window(window);
+       destroy_display(display);
+
+       return 0;
+}
-- 
1.9.0

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