dlopen the compositor, add a glx compositor.
authorKristian Høgsberg <krh@redhat.com>
Thu, 6 Nov 2008 15:38:17 +0000 (10:38 -0500)
committerKristian Høgsberg <krh@redhat.com>
Thu, 6 Nov 2008 15:53:03 +0000 (10:53 -0500)
Makefile
egl-compositor.c
glx-compositor.c [new file with mode: 0644]
wayland.c
wayland.h

index a533f61..383188d 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,16 +1,22 @@
-CFLAGS +=  -Wall -g $(shell pkg-config --cflags libffi libdrm)
-LDLIBS += $(shell pkg-config --libs libffi libdrm)
+CFLAGS = -Wall -g
 
 EAGLE_CFLAGS = -I../eagle
 EAGLE_LDLIBS = -L../eagle -leagle
 
 clients = flower pointer background window
+compositors = egl-compositor.so glx-compositor.so
 
-all : wayland $(clients)
+all : wayland libwayland.so $(compositors) $(clients)
 
-wayland_objs = wayland.o event-loop.o connection.o hash.o input.o egl-compositor.o
-wayland : CFLAGS += $(EAGLE_CFLAGS)
-wayland : LDLIBS += $(EAGLE_LDLIBS)
+wayland_objs =                                 \
+       wayland.o                               \
+       event-loop.o                            \
+       connection.o                            \
+       hash.o                                  \
+       input.o
+
+wayland : CFLAGS += $(shell pkg-config --cflags libffi)
+wayland : LDLIBS += $(shell pkg-config --libs libffi) -ldl -rdynamic
 
 wayland : $(wayland_objs)
        gcc -o $@ $(LDLIBS) $(wayland_objs)
@@ -18,7 +24,23 @@ wayland : $(wayland_objs)
 libwayland_objs = wayland-client.o connection.o
 
 libwayland.so : $(libwayland_objs)
-       gcc -o $@ $(libwayland_objs) -shared
+
+$(compositors) $(clients) : CFLAGS += $(shell pkg-config --cflags libdrm)
+
+egl_compositor_objs = egl-compositor.o
+egl-compositor.so : CFLAGS += $(EAGLE_CFLAGS)
+egl-compositor.so : LDLIBS += $(EAGLE_LDLIBS) -rdynamic
+
+egl-compositor.so : $(egl_compositor_objs)
+
+glx_compositor_objs = glx-compositor.o
+glx-compositor.so : LDLIBS += -lGL
+
+glx-compositor.so : $(glx_compositor_objs)
+
+
+libwayland.so $(compositors) :
+       gcc -o $@ $^ $(LDLIBS) -shared 
 
 flower_objs = flower.o
 pointer_objs = pointer.o
@@ -26,7 +48,7 @@ background_objs = background.o
 window_objs = window.o gears.o
 
 $(clients) : CFLAGS += $(shell pkg-config --cflags cairo)
-$(clients) : LDLIBS += $(shell pkg-config --libs cairo gdk-pixbuf-2.0) -lrt
+$(clients) : LDLIBS += $(shell pkg-config --libs cairo) -lrt
 
 background : CFLAGS += $(shell pkg-config --cflags gdk-pixbuf-2.0)
 background : LDLIBS += $(shell pkg-config --libs gdk-pixbuf-2.0)
@@ -44,4 +66,4 @@ $(clients) :
        gcc -o $@ -L. -lwayland $(LDLIBS) $^
 
 clean :
-       rm -f $(clients) wayland *.o libwayland.so
\ No newline at end of file
+       rm -f $(clients) wayland *.o *.so
index 40ffc4c..c37ea12 100644 (file)
@@ -85,7 +85,8 @@ repaint(void *data)
        eglSwapBuffers(ec->display, ec->surface);
 }
 
-static void schedule_repaint(struct egl_compositor *ec)
+static void
+schedule_repaint(struct egl_compositor *ec)
 {
        struct wl_event_loop *loop;
 
@@ -93,8 +94,9 @@ static void schedule_repaint(struct egl_compositor *ec)
        wl_event_loop_add_idle(loop, repaint, ec);
 }
 
-void notify_surface_create(struct wl_compositor *compositor,
-                          struct wl_surface *surface)
+static void
+notify_surface_create(struct wl_compositor *compositor,
+                     struct wl_surface *surface)
 {
        struct surface_data *sd;
 
@@ -108,8 +110,9 @@ void notify_surface_create(struct wl_compositor *compositor,
        glGenTextures(1, &sd->texture);
 }
                                   
-void notify_surface_destroy(struct wl_compositor *compositor,
-                           struct wl_surface *surface)
+static void
+notify_surface_destroy(struct wl_compositor *compositor,
+                      struct wl_surface *surface)
 {
        struct egl_compositor *ec = (struct egl_compositor *) compositor;
        struct surface_data *sd;
@@ -128,9 +131,10 @@ void notify_surface_destroy(struct wl_compositor *compositor,
        schedule_repaint(ec);
 }
 
-void notify_surface_attach(struct wl_compositor *compositor,
-                          struct wl_surface *surface, uint32_t name, 
-                          uint32_t width, uint32_t height, uint32_t stride)
+static void
+notify_surface_attach(struct wl_compositor *compositor,
+                     struct wl_surface *surface, uint32_t name, 
+                     uint32_t width, uint32_t height, uint32_t stride)
 {
        struct egl_compositor *ec = (struct egl_compositor *) compositor;
        struct surface_data *sd;
@@ -158,8 +162,9 @@ void notify_surface_attach(struct wl_compositor *compositor,
        schedule_repaint(ec);
 }
 
-void notify_surface_map(struct wl_compositor *compositor,
-                       struct wl_surface *surface, struct wl_map *map)
+static void
+notify_surface_map(struct wl_compositor *compositor,
+                  struct wl_surface *surface, struct wl_map *map)
 {
        struct egl_compositor *ec = (struct egl_compositor *) compositor;
        struct surface_data *sd;
@@ -173,7 +178,7 @@ void notify_surface_map(struct wl_compositor *compositor,
        schedule_repaint(ec);
 }
 
-struct wl_compositor_interface interface = {
+static const struct wl_compositor_interface interface = {
        notify_surface_create,
        notify_surface_destroy,
        notify_surface_attach,
diff --git a/glx-compositor.c b/glx-compositor.c
new file mode 100644 (file)
index 0000000..574caaf
--- /dev/null
@@ -0,0 +1,307 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <i915_drm.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <linux/fb.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <GL/gl.h>
+#include <GL/glx.h>
+
+#include "wayland.h"
+
+#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
+
+struct glx_compositor {
+       struct wl_compositor base;
+       Display *display;
+       GLXContext context;
+       Window window;
+       struct wl_display *wl_display;
+       int gem_fd;
+       struct wl_event_source *x_source;
+};
+
+struct surface_data {
+       GLuint texture;
+       struct wl_map map;
+};
+
+static void
+repaint(void *data)
+{
+       struct glx_compositor *gc = data;
+       struct wl_surface_iterator *iterator;
+       struct wl_surface *surface;
+       struct surface_data *sd;
+       GLint vertices[12];
+       GLint tex_coords[12] = { 0, 0,  0, 1,  1, 0,  1, 1 };
+       GLuint indices[4] = { 0, 1, 2, 3 };
+
+       iterator = wl_surface_iterator_create(gc->wl_display, 0);
+       while (wl_surface_iterator_next(iterator, &surface)) {
+               sd = wl_surface_get_data(surface);
+               if (sd == NULL)
+                       continue;
+
+               vertices[0] = sd->map.x;
+               vertices[1] = sd->map.y;
+               vertices[2] = 0;
+
+               vertices[3] = sd->map.x;
+               vertices[4] = sd->map.y + sd->map.height;
+               vertices[5] = 0;
+
+               vertices[6] = sd->map.x + sd->map.width;
+               vertices[7] = sd->map.y;
+               vertices[8] = 0;
+
+               vertices[9] = sd->map.x + sd->map.width;
+               vertices[10] = sd->map.y + sd->map.height;
+               vertices[11] = 0;
+
+               glBindTexture(GL_TEXTURE_2D, sd->texture);
+               glEnable(GL_TEXTURE_2D);
+               glEnable(GL_BLEND);
+               /* Assume pre-multiplied alpha for now, this probably
+                * needs to be a wayland visual type of thing. */
+               glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+
+               glEnableClientState(GL_VERTEX_ARRAY);
+               glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+               glVertexPointer(3, GL_INT, 0, vertices);
+               glTexCoordPointer(2, GL_INT, 0, tex_coords);
+               glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_INT, indices);
+       }
+       wl_surface_iterator_destroy(iterator);
+
+       glXSwapBuffers(gc->display, gc->window);
+}
+
+static void
+schedule_repaint(struct glx_compositor *gc)
+{
+       struct wl_event_loop *loop;
+
+       loop = wl_display_get_event_loop(gc->wl_display);
+       wl_event_loop_add_idle(loop, repaint, gc);
+}
+
+static void
+notify_surface_create(struct wl_compositor *compositor,
+                     struct wl_surface *surface)
+{
+       struct surface_data *sd;
+
+       sd = malloc(sizeof *sd);
+       if (sd == NULL)
+               return;
+
+       wl_surface_set_data(surface, sd);
+
+       glGenTextures(1, &sd->texture);
+}
+                                  
+static void
+notify_surface_destroy(struct wl_compositor *compositor,
+                      struct wl_surface *surface)
+{
+       struct glx_compositor *gc = (struct glx_compositor *) compositor;
+       struct surface_data *sd;
+
+       sd = wl_surface_get_data(surface);
+       if (sd == NULL)
+               return;
+
+       glDeleteTextures(1, &sd->texture);
+
+       free(sd);
+
+       schedule_repaint(gc);
+}
+
+static void
+notify_surface_attach(struct wl_compositor *compositor,
+                     struct wl_surface *surface, uint32_t name, 
+                     uint32_t width, uint32_t height,
+                     uint32_t stride)
+{
+       struct glx_compositor *gc = (struct glx_compositor *) compositor;
+       struct surface_data *sd;
+       struct drm_gem_open open_arg;
+       struct drm_gem_close close_arg;
+       struct drm_i915_gem_pread pread;
+       uint32_t size;
+       void *data;
+       int ret;
+
+       sd = wl_surface_get_data(surface);
+       if (sd == NULL)
+               return;
+
+       open_arg.name = name;
+       ret = ioctl(gc->gem_fd, DRM_IOCTL_GEM_OPEN, &open_arg);
+       if (ret != 0) {
+               fprintf(stderr,
+                       "failed to gem_open name %d, fd=%d: %m\n",
+                       name, gc->gem_fd);
+               return;
+       }
+
+       size = height * stride;
+       data = malloc(size);
+       if (data == NULL) {
+               fprintf(stderr, "malloc for gem_pread failed\n");
+               return;
+       }
+
+       pread.handle = open_arg.handle;
+       pread.pad = 0;
+       pread.offset = 0;
+       pread.size = size;
+       pread.data_ptr = (long) data;
+
+       if (ioctl(gc->gem_fd, DRM_IOCTL_I915_GEM_PREAD, &pread)) {
+               fprintf(stderr, "gem_pread failed");
+               return;
+       }
+
+       close_arg.handle = open_arg.handle;
+       ret = ioctl(gc->gem_fd, DRM_IOCTL_GEM_CLOSE, &close_arg);
+       if (ret != 0) {
+               fprintf(stderr, "failed to gem_close name %d: %m\n", name);
+               return;
+       }
+
+       glBindTexture(GL_TEXTURE_2D, sd->texture);
+       glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
+       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
+                    GL_BGRA, GL_UNSIGNED_BYTE, data);
+
+       free(data);
+
+       schedule_repaint(gc);
+}
+
+static void
+notify_surface_map(struct wl_compositor *compositor,
+                  struct wl_surface *surface, struct wl_map *map)
+{
+       struct glx_compositor *gc = (struct glx_compositor *) compositor;
+       struct surface_data *sd;
+
+       sd = wl_surface_get_data(surface);
+       if (sd == NULL)
+               return;
+
+       sd->map = *map;
+
+       schedule_repaint(gc);
+}
+
+static const struct wl_compositor_interface interface = {
+       notify_surface_create,
+       notify_surface_destroy,
+       notify_surface_attach,
+       notify_surface_map
+};
+
+static const char gem_device[] = "/dev/dri/card0";
+
+static void
+display_data(int fd, uint32_t mask, void *data)
+{
+       struct glx_compositor *gc = data;
+       XEvent ev;
+
+       while (XPending(gc->display) > 0) {
+               XNextEvent(gc->display, &ev);
+               /* Some day we'll do something useful with these events. */
+       }
+}
+
+struct wl_compositor *
+wl_compositor_create(struct wl_display *display)
+{
+       static int attribs[] = {
+               GLX_RGBA,
+               GLX_RED_SIZE, 1,
+               GLX_GREEN_SIZE, 1,
+               GLX_BLUE_SIZE, 1,
+               GLX_DOUBLEBUFFER,
+               GLX_DEPTH_SIZE, 1,
+               None
+       };
+       struct glx_compositor *gc;
+       const int x = 100, y = 100, width = 1024, height = 768;
+       XSetWindowAttributes attr;
+       unsigned long mask;
+       Window root;
+       XVisualInfo *visinfo;
+       int screen;
+       struct wl_event_loop *loop;
+
+       gc = malloc(sizeof *gc);
+       if (gc == NULL)
+               return NULL;
+
+       gc->base.interface = &interface;
+       gc->wl_display = display;
+       gc->display = XOpenDisplay(NULL);
+       if (gc->display == NULL) {
+               free(gc);
+               return NULL;
+       }
+
+       loop = wl_display_get_event_loop(gc->wl_display);
+       gc->x_source = wl_event_loop_add_fd(loop,
+                                           ConnectionNumber(gc->display),
+                                           WL_EVENT_READABLE,
+                                           display_data, gc);
+
+       screen = DefaultScreen(gc->display);
+       root = RootWindow(gc->display, screen);
+
+       visinfo = glXChooseVisual(gc->display, screen, attribs);
+
+       /* window attributes */
+       attr.background_pixel = 0;
+       attr.border_pixel = 0;
+       attr.colormap = XCreateColormap(gc->display,
+                                       root, visinfo->visual, AllocNone);
+       attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+       mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+       gc->window = XCreateWindow(gc->display, root, x, y, width, height,
+                                  0, visinfo->depth, InputOutput,
+                                  visinfo->visual, mask, &attr);
+
+       gc->context = glXCreateContext(gc->display, visinfo, NULL, True);
+
+       XMapWindow(gc->display, gc->window);
+       glXMakeCurrent(gc->display, gc->window, gc->context);
+
+       glViewport(0, 0, width, height);
+       glMatrixMode(GL_PROJECTION);
+       glLoadIdentity();
+       glOrtho(0, width, height, 0, 0, 1000.0);
+       glMatrixMode(GL_MODELVIEW);
+       glClearColor(0.0, 0.05, 0.2, 0.0);
+
+       gc->gem_fd = open(gem_device, O_RDWR);
+       if (gc->gem_fd < 0) {
+               fprintf(stderr, "failed to open drm device\n");
+               return NULL;
+       }
+
+       schedule_repaint(gc);
+
+       return &gc->base;
+}
index 765a443..b51d387 100644 (file)
--- a/wayland.c
+++ b/wayland.c
@@ -7,6 +7,7 @@
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/un.h>
+#include <dlfcn.h>
 #include <ffi.h>
 
 #include "wayland.h"
@@ -98,7 +99,7 @@ static void
 wl_surface_destroy(struct wl_client *client,
                   struct wl_surface *surface)
 {
-       struct wl_compositor_interface *interface;
+       const struct wl_compositor_interface *interface;
 
        interface = client->display->compositor->interface;
        interface->notify_surface_destroy(client->display->compositor,
@@ -111,7 +112,7 @@ wl_surface_attach(struct wl_client *client,
                  struct wl_surface *surface, uint32_t name, 
                  uint32_t width, uint32_t height, uint32_t stride)
 {
-       struct wl_compositor_interface *interface;
+       const struct wl_compositor_interface *interface;
 
        interface = client->display->compositor->interface;
        interface->notify_surface_attach(client->display->compositor,
@@ -129,7 +130,7 @@ void
 wl_surface_map(struct wl_client *client, struct wl_surface *surface,
               int32_t x, int32_t y, int32_t width, int32_t height)
 {
-       struct wl_compositor_interface *interface;
+       const struct wl_compositor_interface *interface;
 
        /* FIXME: This needs to take a tri-mesh argument... - count
         * and a list of tris. 0 tris means unmap. */
@@ -170,7 +171,7 @@ struct wl_surface *
 wl_surface_create(struct wl_display *display, uint32_t id)
 {
        struct wl_surface *surface;
-       struct wl_compositor_interface *interface;
+       const struct wl_compositor_interface *interface;
 
        surface = malloc(sizeof *surface);
        if (surface == NULL)
@@ -706,10 +707,41 @@ wl_surface_iterator_destroy(struct wl_surface_iterator *iterator)
        free(iterator);
 }
 
+static int
+load_compositor(struct wl_display *display, const char *path)
+{
+       struct wl_compositor *(*create)(struct wl_display *display);
+       struct wl_compositor *compositor;
+       void *p;
+
+       p = dlopen(path, RTLD_LAZY | RTLD_GLOBAL);
+       if (p == NULL) {
+               fprintf(stderr, "failed to open compositor %s: %s\n",
+                       path, dlerror());
+               return -1;
+       }
+
+       create = dlsym(p, "wl_compositor_create");
+       if (create == NULL) {
+               fprintf(stderr, "failed to look up compositor constructor\n");
+               return -1;
+       }
+               
+       compositor = create(display);
+       if (compositor == NULL) {
+               fprintf(stderr, "couldn't create compositor\n");
+               return -1;
+       }
+
+       wl_display_set_compositor(display, compositor);
+
+       return 0;
+}
+
 int main(int argc, char *argv[])
 {
        struct wl_display *display;
-       struct wl_compositor *compositor;
+       const char *compositor = "egl-compositor.so";
 
        display = wl_display_create();
 
@@ -718,10 +750,9 @@ int main(int argc, char *argv[])
                exit(EXIT_FAILURE);
        }
 
-       compositor = wl_compositor_create(display);
-       wl_display_set_compositor(display, compositor);
-
-       printf("wayland online, display is %p\n", display);
+       if (argc == 2)
+               compositor = argv[1];
+       load_compositor(display, compositor);
 
        wl_display_run(display);
 
index a7e80a4..ec28a44 100644 (file)
--- a/wayland.h
+++ b/wayland.h
@@ -113,7 +113,7 @@ wl_display_post_button_event(struct wl_display *display,
                             struct wl_object *source, int button, int state);
 
 struct wl_compositor {
-       struct wl_compositor_interface *interface;
+       const struct wl_compositor_interface *interface;
 };
 
 struct wl_compositor_interface {
@@ -128,8 +128,6 @@ struct wl_compositor_interface {
                                   struct wl_surface *surface, struct wl_map *map);
 };
 
-struct wl_compositor *wl_compositor_create(struct wl_display *display);
-
 void wl_display_set_compositor(struct wl_display *display,
                               struct wl_compositor *compositor);