From 5d3de309f44f6a72f2a46db792f3865088897039 Mon Sep 17 00:00:00 2001
From: Mathias Agopian <mathias@google.com>
Date: Thu, 5 Aug 2010 15:24:35 -0700
Subject: first stab at hwcomposer HAL and default implementation.

Change-Id: I7ff47b94a6b34a8f61031bd94e936a088dcea6ab
---
 modules/hwcomposer/hwcomposer.cpp | 114 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 modules/hwcomposer/hwcomposer.cpp

(limited to 'modules/hwcomposer/hwcomposer.cpp')

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;
+}
-- 
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