1 files changed, 134 insertions, 0 deletions
diff --git a/widget/gonk/hwchal/HwcHALBase.h b/widget/gonk/hwchal/HwcHALBase.h
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+++ b/widget/gonk/hwchal/HwcHALBase.h
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim:set ts=4 sw=4 sts=4 et: */
+/*
+ * Copyright (c) 2015 The Linux Foundation. All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef mozilla_HwcHALBase
+#define mozilla_HwcHALBase
+
+#include "mozilla/UniquePtr.h"
+#include "nsRect.h"
+
+#include <hardware/hwcomposer.h>
+
+#ifndef HWC_BLIT
+#if ANDROID_VERSION >= 21
+#define HWC_BLIT 0xFF
+#elif ANDROID_VERSION >= 17
+#define HWC_BLIT (HWC_FRAMEBUFFER_TARGET + 1)
+#else
+// ICS didn't support this. However, we define this
+// for passing compilation
+#define HWC_BLIT 0xFF
+#endif // #if ANDROID_VERSION
+#endif // #ifndef HWC_BLIT
+
+namespace mozilla {
+
+#if ANDROID_VERSION >= 17
+using HwcDevice = hwc_composer_device_1_t;
+using HwcList   = hwc_display_contents_1_t;
+using HwcLayer  = hwc_layer_1_t;
+#else
+using HwcDevice = hwc_composer_device_t;
+using HwcList   = hwc_layer_list_t;
+using HwcLayer  = hwc_layer_t;
+#endif
+
+// HwcHAL definition for HwcEvent callback types
+// Note: hwc_procs is different between ICS and later,
+//       and the signature of invalidate is also different.
+//       Use this wrap struct to hide the detail. BTW,
+//       we don't have to register callback functions on ICS, so
+//       there is no callbacks for ICS in HwcHALProcs.
+typedef struct HwcHALProcs {
+    void (*invalidate)(const struct hwc_procs* procs);
+    void (*vsync)(const struct hwc_procs* procs, int disp, int64_t timestamp);
+    void (*hotplug)(const struct hwc_procs* procs, int disp, int connected);
+} HwcHALProcs_t;
+
+// HwcHAL class
+// This class handle all the HAL related work
+// The purpose of HwcHAL is to make HwcComposer2D simpler.
+class HwcHALBase {
+
+public:
+    // Query Types. We can add more types easily in the future
+    enum class QueryType {
+        COLOR_FILL = 0x8,
+        RB_SWAP = 0x40
+    };
+
+public:
+    explicit HwcHALBase() = default;
+
+    virtual ~HwcHALBase() {}
+
+    // Create HwcHAL module, Only HwcComposer2D calls this.
+    // If other modules want to use HwcHAL, please use APIs in
+    // HwcComposer2D
+    static UniquePtr<HwcHALBase> CreateHwcHAL();
+
+    // Check if mHwc exists
+    virtual bool HasHwc() const = 0;
+
+    // Set EGL info (only ICS need this info)
+    virtual void SetEGLInfo(hwc_display_t aEGLDisplay,
+                            hwc_surface_t aEGLSurface) = 0;
+
+    // HwcDevice query properties
+    virtual bool Query(QueryType aType) = 0;
+
+    // HwcDevice set
+    virtual int Set(HwcList *aList,
+                    uint32_t aDisp) = 0;
+
+    // Reset HwcDevice
+    virtual int ResetHwc() = 0;
+
+    // HwcDevice prepare
+    virtual int Prepare(HwcList *aList,
+                        uint32_t aDisp,
+                        hwc_rect_t aDispRect,
+                        buffer_handle_t aHandle,
+                        int aFenceFd) = 0;
+
+    // Check transparency support
+    virtual bool SupportTransparency() const = 0;
+
+    // Get a geometry change flag
+    virtual uint32_t GetGeometryChangedFlag(bool aGeometryChanged) const = 0;
+
+    // Set crop help
+    virtual void SetCrop(HwcLayer &aLayer,
+                         const hwc_rect_t &aSrcCrop) const = 0;
+
+    // Enable HW Vsync
+    virtual bool EnableVsync(bool aEnable) = 0;
+
+    // Register HW event callback functions
+    virtual bool RegisterHwcEventCallback(const HwcHALProcs_t &aProcs) = 0;
+
+protected:
+    constexpr static uint32_t HwcAPIVersion(uint32_t aMaj, uint32_t aMin) {
+        // HARDWARE_MAKE_API_VERSION_2, from Android hardware.h
+        return (((aMaj & 0xff) << 24) | ((aMin & 0xff) << 16) | (1 & 0xffff));
+    }
+};
+
+} // namespace mozilla
+
+#endif // mozilla_HwcHALBase