1 files changed, 139 insertions, 0 deletions
diff --git a/libs/surfaceflinger/Buffer.cpp b/libs/surfaceflinger/Buffer.cpp
new file mode 100644
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--- /dev/null
+++ b/libs/surfaceflinger/Buffer.cpp
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2007 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 <stdlib.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/Log.h>
+#include <binder/MemoryBase.h>
+#include <binder/IMemory.h>
+
+#include <ui/PixelFormat.h>
+#include <ui/Surface.h>
+#include <pixelflinger/pixelflinger.h>
+
+#include "Buffer.h"
+#include "BufferAllocator.h"
+#include "SurfaceFlinger.h"
+
+
+namespace android {
+
+// ===========================================================================
+// Buffer and implementation of android_native_buffer_t
+// ===========================================================================
+
+Buffer::Buffer()
+    : SurfaceBuffer(), mInitCheck(NO_ERROR),  mVStride(0)
+{
+}
+
+Buffer::Buffer(uint32_t w, uint32_t h, PixelFormat format,
+        uint32_t reqUsage, uint32_t flags)
+    : SurfaceBuffer(), mInitCheck(NO_INIT), mVStride(0)
+{
+    mInitCheck = initSize(w, h, format, reqUsage, flags);
+}
+
+Buffer::~Buffer()
+{
+    if (handle) {
+        BufferAllocator& allocator(BufferAllocator::get());
+        allocator.free(handle);
+    }
+}
+
+status_t Buffer::initCheck() const {
+    return mInitCheck;
+}
+
+android_native_buffer_t* Buffer::getNativeBuffer() const
+{
+    return static_cast<android_native_buffer_t*>(const_cast<Buffer*>(this));
+}
+
+status_t Buffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
+        uint32_t reqUsage, uint32_t flags)
+{
+    if (handle) {
+        BufferAllocator& allocator(BufferAllocator::get());
+        allocator.free(handle);
+        handle = 0;
+    }
+    return initSize(w, h, f, reqUsage, flags);
+}
+
+status_t Buffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
+        uint32_t reqUsage, uint32_t flags)
+{
+    status_t err = NO_ERROR;
+
+    BufferAllocator& allocator = BufferAllocator::get();
+        
+    /*
+     *  buffers used for software rendering, but h/w composition
+     *  are allocated with SW_READ_OFTEN | SW_WRITE_OFTEN | HW_TEXTURE
+     *  
+     *  buffers used for h/w rendering and h/w composition
+     *  are allocated with  HW_RENDER | HW_TEXTURE
+     *  
+     *  buffers used with h/w rendering and either NPOT or no egl_image_ext
+     *  are allocated with SW_READ_RARELY | HW_RENDER 
+     *  
+     */
+    
+    if (flags & Buffer::SECURE) {
+        // secure buffer, don't store it into the GPU
+        usage = BufferAllocator::USAGE_SW_READ_OFTEN | 
+                BufferAllocator::USAGE_SW_WRITE_OFTEN;
+    } else {
+        // it's allowed to modify the usage flags here, but generally
+        // the requested flags should be honored.
+        usage = reqUsage | BufferAllocator::USAGE_HW_TEXTURE;
+    }
+
+    err = allocator.alloc(w, h, format, usage, &handle, &stride);
+    if (err == NO_ERROR) {
+        this->width  = w;
+        this->height = h;
+        this->format = format;
+        mVStride = 0;
+    }
+
+    return err;
+}
+
+status_t Buffer::lock(GGLSurface* sur, uint32_t usage) 
+{
+    void* vaddr;
+    status_t res = SurfaceBuffer::lock(usage, &vaddr);
+    if (res == NO_ERROR && sur) {
+        sur->version = sizeof(GGLSurface);
+        sur->width = width;
+        sur->height = height;
+        sur->stride = stride;
+        sur->format = format;
+        sur->vstride = mVStride;
+        sur->data = static_cast<GGLubyte*>(vaddr);
+    }
+    return res;
+}
+
+// ---------------------------------------------------------------------------
+
+}; // namespace android