first stab at hwcomposer HAL and default implementation.

Change-Id: I7ff47b94a6b34a8f61031bd94e936a088dcea6ab

3 files changed, 144 insertions, 0 deletions

diff --git a/modules/hwcomposer/Android.mk b/modules/hwcomposer/Android.mk
new file mode 100644
index 0000000..233059b
--- /dev/null
+++ b/modules/hwcomposer/Android.mk
@@ -0,0 +1,27 @@
+# Copyright (C) 2008 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.
+
+
+LOCAL_PATH := $(call my-dir)
+
+# HAL module implemenation, not prelinked and stored in
+# hw/<OVERLAY_HARDWARE_MODULE_ID>.<ro.product.board>.so
+include $(CLEAR_VARS)
+LOCAL_PRELINK_MODULE := false
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_SHARED_LIBRARIES := liblog libEGL
+LOCAL_SRC_FILES := hwcomposer.cpp
+LOCAL_MODULE := hwcomposer.default
+LOCAL_CFLAGS:= -DLOG_TAG=\"hwcomposer\"
+include $(BUILD_SHARED_LIBRARY)
diff --git a/modules/hwcomposer/README.android b/modules/hwcomposer/README.android
new file mode 100644
index 0000000..4aa7203
--- /dev/null
+++ b/modules/hwcomposer/README.android
@@ -0,0 +1,3 @@
+
+Skeleton for the "hwcomposer" HAL module.
+
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;
+}