129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/*
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* Copyright 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __GRALLOC_CB_H__
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#define __GRALLOC_CB_H__
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#include <cutils/native_handle.h>
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#include <qemu_pipe_types_bp.h>
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const uint32_t CB_HANDLE_MAGIC_MASK = 0xFFFFFFF0;
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const uint32_t CB_HANDLE_MAGIC_BASE = 0xABFABFA0;
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#define CB_HANDLE_NUM_INTS(nfd) \
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((sizeof(*this)-sizeof(native_handle_t)-nfd*sizeof(int32_t))/sizeof(int32_t))
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struct cb_handle_t : public native_handle_t {
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cb_handle_t(int32_t p_bufferFd,
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QEMU_PIPE_HANDLE p_hostHandleRefCountFd,
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uint32_t p_magic,
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uint32_t p_hostHandle,
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int32_t p_usage,
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int32_t p_width,
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int32_t p_height,
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int32_t p_format,
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int32_t p_glFormat,
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int32_t p_glType,
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uint32_t p_bufSize,
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void* p_bufPtr,
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uint64_t p_mmapedOffset)
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: bufferFd(p_bufferFd),
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hostHandleRefCountFd(p_hostHandleRefCountFd),
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magic(p_magic),
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hostHandle(p_hostHandle),
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usage(p_usage),
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width(p_width),
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height(p_height),
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format(p_format),
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glFormat(p_glFormat),
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glType(p_glType),
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bufferSize(p_bufSize),
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mmapedOffsetLo(static_cast<uint32_t>(p_mmapedOffset)),
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mmapedOffsetHi(static_cast<uint32_t>(p_mmapedOffset >> 32)),
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lockedLeft(0),
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lockedTop(0),
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lockedWidth(0),
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lockedHeight(0) {
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version = sizeof(native_handle);
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numFds = ((bufferFd >= 0) ? 1 : 0) + (qemu_pipe_valid(hostHandleRefCountFd) ? 1 : 0);
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numInts = 0; // has to be overwritten in children classes
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setBufferPtr(p_bufPtr);
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}
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void* getBufferPtr() const {
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const uint64_t addr = (uint64_t(bufferPtrHi) << 32) | bufferPtrLo;
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return reinterpret_cast<void*>(static_cast<uintptr_t>(addr));
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}
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void setBufferPtr(void* ptr) {
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const uint64_t addr = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(ptr));
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bufferPtrLo = uint32_t(addr);
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bufferPtrHi = uint32_t(addr >> 32);
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}
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uint64_t getMmapedOffset() const {
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return (uint64_t(mmapedOffsetHi) << 32) | mmapedOffsetLo;
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}
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uint32_t allocatedSize() const {
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return getBufferPtr() ? bufferSize : 0;
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}
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bool isValid() const {
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return (version == sizeof(native_handle))
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&& (magic & CB_HANDLE_MAGIC_MASK) == CB_HANDLE_MAGIC_BASE;
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}
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static cb_handle_t* from(void* p) {
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if (!p) { return NULL; }
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cb_handle_t* cb = static_cast<cb_handle_t*>(p);
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return cb->isValid() ? cb : NULL;
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}
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static const cb_handle_t* from(const void* p) {
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return from(const_cast<void*>(p));
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}
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static cb_handle_t* from_unconst(const void* p) {
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return from(const_cast<void*>(p));
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}
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// fds
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int32_t bufferFd; // underlying buffer file handle
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QEMU_PIPE_HANDLE hostHandleRefCountFd; // guest side refcounter to hostHandle
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// ints
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uint32_t magic; // magic number in order to validate a pointer
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uint32_t hostHandle; // the host reference to this buffer
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int32_t usage; // usage bits the buffer was created with
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int32_t width; // buffer width
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int32_t height; // buffer height
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int32_t format; // real internal pixel format format
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int32_t glFormat; // OpenGL format enum used for host h/w color buffer
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int32_t glType; // OpenGL type enum used when uploading to host
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uint32_t bufferSize; // buffer size and location
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uint32_t bufferPtrLo;
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uint32_t bufferPtrHi;
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uint32_t mmapedOffsetLo;
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uint32_t mmapedOffsetHi;
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int32_t lockedLeft; // region of buffer locked for s/w write
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int32_t lockedTop;
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int32_t lockedWidth;
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int32_t lockedHeight;
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};
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#endif //__GRALLOC_CB_H__
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