first stab at hwcomposer HAL and default implementation.
Change-Id: I7ff47b94a6b34a8f61031bd94e936a088dcea6ab
diff --git a/modules/hwcomposer/hwcomposer.cpp b/modules/hwcomposer/hwcomposer.cpp
new file mode 100644
index 0000000..4cc050c
--- /dev/null
+++ b/modules/hwcomposer/hwcomposer.cpp
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <hardware/hardware.h>
+#include <hardware/overlay.h>
+
+#include <fcntl.h>
+#include <errno.h>
+
+#include <cutils/log.h>
+#include <cutils/atomic.h>
+
+#include <hardware/hwcomposer.h>
+
+#include <EGL/egl.h>
+
+/*****************************************************************************/
+
+struct hwc_context_t {
+ hwc_composer_device_t device;
+ /* our private state goes below here */
+};
+
+static int hwc_device_open(const struct hw_module_t* module, const char* name,
+ struct hw_device_t** device);
+
+static struct hw_module_methods_t hwc_module_methods = {
+ open: hwc_device_open
+};
+
+hwc_module_t HAL_MODULE_INFO_SYM = {
+ common: {
+ tag: HARDWARE_MODULE_TAG,
+ version_major: 1,
+ version_minor: 0,
+ id: HWC_HARDWARE_MODULE_ID,
+ name: "Sample hwcomposer module",
+ author: "The Android Open Source Project",
+ methods: &hwc_module_methods,
+ }
+};
+
+/*****************************************************************************/
+
+static int hwc_prepare(hwc_composer_device_t *dev, hwc_layer_list_t* list) {
+ if (list && (list->flags & HWC_GEOMETRY_CHANGED)) {
+ for (size_t i=0 ; i<list->numHwLayers ; i++) {
+ list->hwLayers[i].compositionType = HWC_FRAMEBUFFER;
+ }
+ }
+ return 0;
+}
+
+static int hwc_set(hwc_composer_device_t *dev,
+ hwc_display_t dpy,
+ hwc_surface_t sur,
+ hwc_layer_list_t* list)
+{
+ EGLBoolean sucess = eglSwapBuffers((EGLDisplay)dpy, (EGLSurface)sur);
+ if (!sucess) {
+ return HWC_EGL_ERROR;
+ }
+ return 0;
+}
+
+static int hwc_device_close(struct hw_device_t *dev)
+{
+ struct hwc_context_t* ctx = (struct hwc_context_t*)dev;
+ if (ctx) {
+ free(ctx);
+ }
+ return 0;
+}
+
+/*****************************************************************************/
+
+static int hwc_device_open(const struct hw_module_t* module, const char* name,
+ struct hw_device_t** device)
+{
+ int status = -EINVAL;
+ if (!strcmp(name, HWC_HARDWARE_COMPOSER)) {
+ struct hwc_context_t *dev;
+ dev = (hwc_context_t*)malloc(sizeof(*dev));
+
+ /* initialize our state here */
+ memset(dev, 0, sizeof(*dev));
+
+ /* initialize the procs */
+ dev->device.common.tag = HARDWARE_DEVICE_TAG;
+ dev->device.common.version = 0;
+ dev->device.common.module = const_cast<hw_module_t*>(module);
+ dev->device.common.close = hwc_device_close;
+
+ dev->device.prepare = hwc_prepare;
+ dev->device.set = hwc_set;
+
+ *device = &dev->device.common;
+ status = 0;
+ }
+ return status;
+}