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-rw-r--r--src/wld/wayland-drm.c296
1 files changed, 296 insertions, 0 deletions
diff --git a/src/wld/wayland-drm.c b/src/wld/wayland-drm.c
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index 0000000..7e7fe4c
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+++ b/src/wld/wayland-drm.c
@@ -0,0 +1,296 @@
+/* wld: wayland-drm.c
+ *
+ * Copyright (c) 2013, 2014 Michael Forney
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "wayland.h"
+#include "drm.h"
+#include "wayland-drm-client-protocol.h"
+#include "wayland-private.h"
+#include "wld-private.h"
+#include "drm-private.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <xf86drm.h>
+
+struct drm_context
+{
+ struct wayland_context base;
+ struct wld_context * driver_context;
+ struct wl_drm * wl;
+ struct wl_registry * registry;
+ struct wl_array formats;
+ uint32_t capabilities;
+ int fd;
+ bool authenticated;
+};
+
+#define WAYLAND_IMPL_NAME drm
+#include "interface/context.h"
+#include "interface/wayland.h"
+IMPL(drm_context, wld_context)
+
+static void registry_global(void * data, struct wl_registry * registry,
+ uint32_t name, const char * interface,
+ uint32_t version);
+static void registry_global_remove(void * data, struct wl_registry * registry,
+ uint32_t name);
+
+static void drm_device(void * data, struct wl_drm * wl, const char * name);
+static void drm_format(void * data, struct wl_drm * wl, uint32_t format);
+static void drm_authenticated(void * data, struct wl_drm * wl);
+static void drm_capabilities(void * data, struct wl_drm * wl,
+ uint32_t capabilities);
+
+const static struct wl_registry_listener registry_listener = {
+ .global = &registry_global,
+ .global_remove = &registry_global_remove
+};
+
+const static struct wl_drm_listener drm_listener = {
+ .device = &drm_device,
+ .format = &drm_format,
+ .authenticated = &drm_authenticated,
+ .capabilities = &drm_capabilities
+};
+
+struct wayland_context * wayland_create_context(struct wl_display * display,
+ struct wl_event_queue * queue)
+{
+ struct drm_context * context;
+
+ if (!(context = malloc(sizeof *context)))
+ goto error0;
+
+ context_initialize(&context->base.base, &wld_context_impl);
+ context->wl = NULL;
+ context->fd = -1;
+ context->capabilities = 0;
+ wl_array_init(&context->formats);
+
+ if (!(context->registry = wl_display_get_registry(display)))
+ goto error1;
+
+ wl_registry_add_listener(context->registry, &registry_listener, context);
+ wl_proxy_set_queue((struct wl_proxy *) context->registry, queue);
+
+ /* Wait for wl_drm global. */
+ wl_display_roundtrip_queue(display, queue);
+
+ if (!context->wl)
+ {
+ DEBUG("No wl_drm global\n");
+ goto error2;
+ }
+
+ wl_drm_add_listener(context->wl, &drm_listener, context);
+
+ /* Wait for DRM capabilities and device. */
+ wl_display_roundtrip_queue(display, queue);
+
+ if (!(context->capabilities & WL_DRM_CAPABILITY_PRIME))
+ {
+ DEBUG("No PRIME support\n");
+ goto error3;
+ }
+
+ if (context->fd == -1)
+ {
+ DEBUG("No DRM device\n");
+ goto error3;
+ }
+
+ /* Wait for DRM authentication. */
+ wl_display_roundtrip_queue(display, queue);
+
+ if (!context->authenticated)
+ {
+ DEBUG("DRM authentication failed\n");
+ goto error4;
+ }
+
+ if (!(context->driver_context = wld_drm_create_context(context->fd)))
+ {
+ DEBUG("Couldn't initialize context for DRM device\n");
+ goto error4;
+ }
+
+ return &context->base;
+
+ error4:
+ close(context->fd);
+ error3:
+ wl_drm_destroy(context->wl);
+ error2:
+ wl_registry_destroy(context->registry);
+ error1:
+ wl_array_release(&context->formats);
+ free(context);
+ error0:
+ return NULL;
+}
+
+bool wayland_has_format(struct wld_context * base, uint32_t format)
+{
+ struct drm_context * context = drm_context(base);
+ uint32_t * supported_format;
+
+ wl_array_for_each(supported_format, &context->formats)
+ {
+ if (*supported_format == format)
+ return true;
+ }
+
+ return false;
+}
+
+EXPORT
+int wld_wayland_drm_get_fd(struct wld_context * base)
+{
+ struct drm_context * context = drm_context(base);
+
+ return context->authenticated ? context->fd : -1;
+}
+
+struct wld_renderer * context_create_renderer(struct wld_context * base)
+{
+ struct drm_context * context = drm_context(base);
+
+ return wld_create_renderer(context->driver_context);
+}
+
+struct buffer * context_create_buffer(struct wld_context * base,
+ uint32_t width, uint32_t height,
+ uint32_t format, uint32_t flags)
+{
+ struct drm_context * context = drm_context(base);
+ struct buffer * buffer;
+ union wld_object object;
+ struct wl_buffer * wl;
+
+ if (!wayland_has_format(base, format))
+ goto error0;
+
+ buffer = context->driver_context->impl->create_buffer
+ (context->driver_context, width, height, format, flags);
+
+ if (!buffer)
+ goto error0;
+
+ if (!wld_export(&buffer->base, WLD_DRM_OBJECT_PRIME_FD, &object))
+ goto error1;
+
+ wl = wl_drm_create_prime_buffer(context->wl, object.i, width, height,
+ format, 0, buffer->base.pitch, 0, 0, 0, 0);
+ close(object.i);
+
+ if (!wl)
+ goto error1;
+
+ if (!wayland_buffer_add_exporter(buffer, wl))
+ goto error2;
+
+ return buffer;
+
+ error2:
+ wl_buffer_destroy(wl);
+ error1:
+ wld_buffer_unreference(&buffer->base);
+ error0:
+ return NULL;
+}
+
+struct buffer * context_import_buffer(struct wld_context * context,
+ uint32_t type, union wld_object object,
+ uint32_t width, uint32_t height,
+ uint32_t format, uint32_t pitch)
+{
+ return NULL;
+}
+
+void context_destroy(struct wld_context * base)
+{
+ struct drm_context * context = drm_context(base);
+
+ wld_destroy_context(context->driver_context);
+ close(context->fd);
+ wl_drm_destroy(context->wl);
+ wl_registry_destroy(context->registry);
+ wl_array_release(&context->formats);
+ wl_event_queue_destroy(context->base.queue);
+ free(context);
+}
+
+void registry_global(void * data, struct wl_registry * registry, uint32_t name,
+ const char * interface, uint32_t version)
+{
+ struct drm_context * context = data;
+
+ if (strcmp(interface, "wl_drm") == 0 && version >= 2)
+ context->wl = wl_registry_bind(registry, name, &wl_drm_interface, 2);
+}
+
+void registry_global_remove(void * data, struct wl_registry * registry,
+ uint32_t name)
+{
+}
+
+void drm_device(void * data, struct wl_drm * wl, const char * name)
+{
+ struct drm_context * context = data;
+ drm_magic_t magic;
+
+ context->fd = open(name, O_RDWR);
+
+ if (context->fd == -1)
+ {
+ DEBUG("Couldn't open DRM device '%s'\n", name);
+ return;
+ }
+
+ drmGetMagic(context->fd, &magic);
+ wl_drm_authenticate(wl, magic);
+}
+
+void drm_format(void * data, struct wl_drm * wl, uint32_t format)
+{
+ struct drm_context * context = data;
+
+ *((uint32_t *) wl_array_add(&context->formats, sizeof format)) = format;
+}
+
+void drm_authenticated(void * data, struct wl_drm * wl)
+{
+ struct drm_context * context = data;
+
+ context->authenticated = true;
+}
+
+void drm_capabilities(void * data, struct wl_drm * wl, uint32_t capabilities)
+{
+ struct drm_context * context = data;
+
+ context->capabilities = capabilities;
+}
+