7f8dd0ad2d
Missing project ready to go. This reverts commit 536148699beffcc4e6a2ced7c41fbbc3bcfa9886 Change-Id: I101343b443be6febe160685de6d72ddbf7e6aea5
269 lines
9.3 KiB
C
269 lines
9.3 KiB
C
/*
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* Copyright (C) 2008 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 ANDROID_GRALLOC_INTERFACE_H
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#define ANDROID_GRALLOC_INTERFACE_H
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#include <system/window.h>
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#include <hardware/hardware.h>
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#include <stdint.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <cutils/native_handle.h>
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#include <hardware/hardware.h>
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#include <hardware/fb.h>
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__BEGIN_DECLS
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#define GRALLOC_API_VERSION 1
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/**
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* The id of this module
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*/
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#define GRALLOC_HARDWARE_MODULE_ID "gralloc"
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/**
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* Name of the graphics device to open
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*/
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#define GRALLOC_HARDWARE_GPU0 "gpu0"
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enum {
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/* buffer is never read in software */
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GRALLOC_USAGE_SW_READ_NEVER = 0x00000000,
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/* buffer is rarely read in software */
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GRALLOC_USAGE_SW_READ_RARELY = 0x00000002,
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/* buffer is often read in software */
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GRALLOC_USAGE_SW_READ_OFTEN = 0x00000003,
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/* mask for the software read values */
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GRALLOC_USAGE_SW_READ_MASK = 0x0000000F,
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/* buffer is never written in software */
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GRALLOC_USAGE_SW_WRITE_NEVER = 0x00000000,
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/* buffer is never written in software */
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GRALLOC_USAGE_SW_WRITE_RARELY = 0x00000020,
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/* buffer is never written in software */
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GRALLOC_USAGE_SW_WRITE_OFTEN = 0x00000030,
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/* mask for the software write values */
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GRALLOC_USAGE_SW_WRITE_MASK = 0x000000F0,
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/* buffer will be used as an OpenGL ES texture */
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GRALLOC_USAGE_HW_TEXTURE = 0x00000100,
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/* buffer will be used as an OpenGL ES render target */
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GRALLOC_USAGE_HW_RENDER = 0x00000200,
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/* buffer will be used by the 2D hardware blitter */
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GRALLOC_USAGE_HW_2D = 0x00000400,
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/* buffer will be used by the HWComposer HAL module */
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GRALLOC_USAGE_HW_COMPOSER = 0x00000800,
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/* buffer will be used with the framebuffer device */
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GRALLOC_USAGE_HW_FB = 0x00001000,
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/* buffer will be used with the HW video encoder */
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GRALLOC_USAGE_HW_VIDEO_ENCODER = 0x00010000,
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/* buffer will be written by the HW camera pipeline */
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GRALLOC_USAGE_HW_CAMERA_WRITE = 0x00020000,
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/* buffer will be read by the HW camera pipeline */
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GRALLOC_USAGE_HW_CAMERA_READ = 0x00040000,
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/* buffer will be used as part of zero-shutter-lag queue */
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GRALLOC_USAGE_HW_CAMERA_ZSL = 0x00060000,
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/* mask for the camera access values */
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GRALLOC_USAGE_HW_CAMERA_MASK = 0x00060000,
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/* mask for the software usage bit-mask */
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GRALLOC_USAGE_HW_MASK = 0x00071F00,
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/* buffer should be displayed full-screen on an external display when
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* possible
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*/
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GRALLOC_USAGE_EXTERNAL_DISP = 0x00002000,
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/* Must have a hardware-protected path to external display sink for
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* this buffer. If a hardware-protected path is not available, then
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* either don't composite only this buffer (preferred) to the
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* external sink, or (less desirable) do not route the entire
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* composition to the external sink.
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*/
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GRALLOC_USAGE_PROTECTED = 0x00004000,
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/* implementation-specific private usage flags */
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GRALLOC_USAGE_PRIVATE_0 = 0x10000000,
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GRALLOC_USAGE_PRIVATE_1 = 0x20000000,
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GRALLOC_USAGE_PRIVATE_2 = 0x40000000,
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GRALLOC_USAGE_PRIVATE_3 = 0x80000000,
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GRALLOC_USAGE_PRIVATE_MASK = 0xF0000000,
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};
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/*****************************************************************************/
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/**
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* Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
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* and the fields of this data structure must begin with hw_module_t
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* followed by module specific information.
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*/
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typedef struct gralloc_module_t {
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struct hw_module_t common;
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/*
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* (*registerBuffer)() must be called before a buffer_handle_t that has not
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* been created with (*alloc_device_t::alloc)() can be used.
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*
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* This is intended to be used with buffer_handle_t's that have been
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* received in this process through IPC.
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*
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* This function checks that the handle is indeed a valid one and prepares
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* it for use with (*lock)() and (*unlock)().
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*
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* It is not necessary to call (*registerBuffer)() on a handle created
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* with (*alloc_device_t::alloc)().
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*
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* returns an error if this buffer_handle_t is not valid.
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*/
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int (*registerBuffer)(struct gralloc_module_t const* module,
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buffer_handle_t handle);
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/*
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* (*unregisterBuffer)() is called once this handle is no longer needed in
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* this process. After this call, it is an error to call (*lock)(),
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* (*unlock)(), or (*registerBuffer)().
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*
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* This function doesn't close or free the handle itself; this is done
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* by other means, usually through libcutils's native_handle_close() and
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* native_handle_free().
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*
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* It is an error to call (*unregisterBuffer)() on a buffer that wasn't
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* explicitly registered first.
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*/
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int (*unregisterBuffer)(struct gralloc_module_t const* module,
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buffer_handle_t handle);
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/*
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* The (*lock)() method is called before a buffer is accessed for the
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* specified usage. This call may block, for instance if the h/w needs
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* to finish rendering or if CPU caches need to be synchronized.
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*
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* The caller promises to modify only pixels in the area specified
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* by (l,t,w,h).
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*
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* The content of the buffer outside of the specified area is NOT modified
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* by this call.
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*
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* If usage specifies GRALLOC_USAGE_SW_*, vaddr is filled with the address
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* of the buffer in virtual memory.
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*
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* THREADING CONSIDERATIONS:
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*
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* It is legal for several different threads to lock a buffer from
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* read access, none of the threads are blocked.
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*
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* However, locking a buffer simultaneously for write or read/write is
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* undefined, but:
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* - shall not result in termination of the process
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* - shall not block the caller
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* It is acceptable to return an error or to leave the buffer's content
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* into an indeterminate state.
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*
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* If the buffer was created with a usage mask incompatible with the
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* requested usage flags here, -EINVAL is returned.
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*
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*/
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int (*lock)(struct gralloc_module_t const* module,
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buffer_handle_t handle, int usage,
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int l, int t, int w, int h,
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void** vaddr);
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/*
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* The (*unlock)() method must be called after all changes to the buffer
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* are completed.
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*/
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int (*unlock)(struct gralloc_module_t const* module,
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buffer_handle_t handle);
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/* reserved for future use */
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int (*perform)(struct gralloc_module_t const* module,
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int operation, ... );
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/* reserved for future use */
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void* reserved_proc[7];
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} gralloc_module_t;
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/*****************************************************************************/
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/**
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* Every device data structure must begin with hw_device_t
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* followed by module specific public methods and attributes.
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*/
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typedef struct alloc_device_t {
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struct hw_device_t common;
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/*
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* (*alloc)() Allocates a buffer in graphic memory with the requested
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* parameters and returns a buffer_handle_t and the stride in pixels to
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* allow the implementation to satisfy hardware constraints on the width
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* of a pixmap (eg: it may have to be multiple of 8 pixels).
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* The CALLER TAKES OWNERSHIP of the buffer_handle_t.
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*
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* Returns 0 on success or -errno on error.
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*/
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int (*alloc)(struct alloc_device_t* dev,
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int w, int h, int format, int usage,
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buffer_handle_t* handle, int* stride);
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/*
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* (*free)() Frees a previously allocated buffer.
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* Behavior is undefined if the buffer is still mapped in any process,
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* but shall not result in termination of the program or security breaches
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* (allowing a process to get access to another process' buffers).
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* THIS FUNCTION TAKES OWNERSHIP of the buffer_handle_t which becomes
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* invalid after the call.
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*
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* Returns 0 on success or -errno on error.
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*/
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int (*free)(struct alloc_device_t* dev,
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buffer_handle_t handle);
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/* This hook is OPTIONAL.
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*
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* If non NULL it will be caused by SurfaceFlinger on dumpsys
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*/
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void (*dump)(struct alloc_device_t *dev, char *buff, int buff_len);
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void* reserved_proc[7];
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} alloc_device_t;
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/** convenience API for opening and closing a supported device */
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static inline int gralloc_open(const struct hw_module_t* module,
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struct alloc_device_t** device) {
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return module->methods->open(module,
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GRALLOC_HARDWARE_GPU0, (struct hw_device_t**)device);
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}
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static inline int gralloc_close(struct alloc_device_t* device) {
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return device->common.close(&device->common);
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}
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__END_DECLS
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#endif // ANDROID_GRALLOC_INTERFACE_H
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