/*
 * Copyright © 2011 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *    Benjamin Franzke <benjaminfranzke@googlemail.com>
 */

#ifndef _GBM_H_
#define _GBM_H_

#define __GBM__ 1

#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \file gbm.h
 * \brief Generic Buffer Manager
 */

struct gbm_device;
struct gbm_bo;
struct gbm_surface;

/**
 * \mainpage The Generic Buffer Manager
 *
 * This module provides an abstraction that the caller can use to request a
 * buffer from the underlying memory management system for the platform.
 *
 * This allows the creation of portable code whilst still allowing access to
 * the underlying memory manager.
 */

/**
 * Abstraction representing the handle to a buffer allocated by the
 * manager
 */
union gbm_bo_handle {
  void* ptr;
  int32_t s32;
  uint32_t u32;
  int64_t s64;
  uint64_t u64;
};

/** Format of the allocated buffer */
enum gbm_bo_format {
  /** RGB with 8 bits per channel in a 32 bit value */
  GBM_BO_FORMAT_XRGB8888,
  /** ARGB with 8 bits per channel in a 32 bit value */
  GBM_BO_FORMAT_ARGB8888
};

/**
 * The FourCC format codes are taken from the drm_fourcc.h definition, and
 * re-namespaced. New GBM formats must not be added, unless they are
 * identical ports from drm_fourcc.
 */
#define __gbm_fourcc_code(a, b, c, d)                             \
  ((uint32_t)(a) | ((uint32_t)(b) << 8) | ((uint32_t)(c) << 16) | \
   ((uint32_t)(d) << 24))

#define GBM_FORMAT_BIG_ENDIAN \
  (1 << 31) /* format is big endian instead of little endian */

/* color index */
#define GBM_FORMAT_C8 __gbm_fourcc_code('C', '8', ' ', ' ') /* [7:0] C */

/* 8 bpp Red */
#define GBM_FORMAT_R8 __gbm_fourcc_code('R', '8', ' ', ' ') /* [7:0] R */

/* 16 bpp RG */
#define GBM_FORMAT_GR88 \
  __gbm_fourcc_code('G', 'R', '8', '8') /* [15:0] G:R 8:8 little endian */

/* 8 bpp RGB */
#define GBM_FORMAT_RGB332 \
  __gbm_fourcc_code('R', 'G', 'B', '8') /* [7:0] R:G:B 3:3:2 */
#define GBM_FORMAT_BGR233 \
  __gbm_fourcc_code('B', 'G', 'R', '8') /* [7:0] B:G:R 2:3:3 */

/* 16 bpp RGB */
#define GBM_FORMAT_XRGB4444        \
  __gbm_fourcc_code('X', 'R', '1', \
                    '2') /* [15:0] x:R:G:B 4:4:4:4 little endian */
#define GBM_FORMAT_XBGR4444        \
  __gbm_fourcc_code('X', 'B', '1', \
                    '2') /* [15:0] x:B:G:R 4:4:4:4 little endian */
#define GBM_FORMAT_RGBX4444        \
  __gbm_fourcc_code('R', 'X', '1', \
                    '2') /* [15:0] R:G:B:x 4:4:4:4 little endian */
#define GBM_FORMAT_BGRX4444        \
  __gbm_fourcc_code('B', 'X', '1', \
                    '2') /* [15:0] B:G:R:x 4:4:4:4 little endian */

#define GBM_FORMAT_ARGB4444        \
  __gbm_fourcc_code('A', 'R', '1', \
                    '2') /* [15:0] A:R:G:B 4:4:4:4 little endian */
#define GBM_FORMAT_ABGR4444        \
  __gbm_fourcc_code('A', 'B', '1', \
                    '2') /* [15:0] A:B:G:R 4:4:4:4 little endian */
#define GBM_FORMAT_RGBA4444        \
  __gbm_fourcc_code('R', 'A', '1', \
                    '2') /* [15:0] R:G:B:A 4:4:4:4 little endian */
#define GBM_FORMAT_BGRA4444        \
  __gbm_fourcc_code('B', 'A', '1', \
                    '2') /* [15:0] B:G:R:A 4:4:4:4 little endian */

#define GBM_FORMAT_XRGB1555        \
  __gbm_fourcc_code('X', 'R', '1', \
                    '5') /* [15:0] x:R:G:B 1:5:5:5 little endian */
#define GBM_FORMAT_XBGR1555        \
  __gbm_fourcc_code('X', 'B', '1', \
                    '5') /* [15:0] x:B:G:R 1:5:5:5 little endian */
#define GBM_FORMAT_RGBX5551        \
  __gbm_fourcc_code('R', 'X', '1', \
                    '5') /* [15:0] R:G:B:x 5:5:5:1 little endian */
#define GBM_FORMAT_BGRX5551        \
  __gbm_fourcc_code('B', 'X', '1', \
                    '5') /* [15:0] B:G:R:x 5:5:5:1 little endian */

#define GBM_FORMAT_ARGB1555        \
  __gbm_fourcc_code('A', 'R', '1', \
                    '5') /* [15:0] A:R:G:B 1:5:5:5 little endian */
#define GBM_FORMAT_ABGR1555        \
  __gbm_fourcc_code('A', 'B', '1', \
                    '5') /* [15:0] A:B:G:R 1:5:5:5 little endian */
#define GBM_FORMAT_RGBA5551        \
  __gbm_fourcc_code('R', 'A', '1', \
                    '5') /* [15:0] R:G:B:A 5:5:5:1 little endian */
#define GBM_FORMAT_BGRA5551        \
  __gbm_fourcc_code('B', 'A', '1', \
                    '5') /* [15:0] B:G:R:A 5:5:5:1 little endian */

#define GBM_FORMAT_RGB565 \
  __gbm_fourcc_code('R', 'G', '1', '6') /* [15:0] R:G:B 5:6:5 little endian */
#define GBM_FORMAT_BGR565 \
  __gbm_fourcc_code('B', 'G', '1', '6') /* [15:0] B:G:R 5:6:5 little endian */

/* 24 bpp RGB */
#define GBM_FORMAT_RGB888 \
  __gbm_fourcc_code('R', 'G', '2', '4') /* [23:0] R:G:B little endian */
#define GBM_FORMAT_BGR888 \
  __gbm_fourcc_code('B', 'G', '2', '4') /* [23:0] B:G:R little endian */

/* 32 bpp RGB */
#define GBM_FORMAT_XRGB8888        \
  __gbm_fourcc_code('X', 'R', '2', \
                    '4') /* [31:0] x:R:G:B 8:8:8:8 little endian */
#define GBM_FORMAT_XBGR8888        \
  __gbm_fourcc_code('X', 'B', '2', \
                    '4') /* [31:0] x:B:G:R 8:8:8:8 little endian */
#define GBM_FORMAT_RGBX8888        \
  __gbm_fourcc_code('R', 'X', '2', \
                    '4') /* [31:0] R:G:B:x 8:8:8:8 little endian */
#define GBM_FORMAT_BGRX8888        \
  __gbm_fourcc_code('B', 'X', '2', \
                    '4') /* [31:0] B:G:R:x 8:8:8:8 little endian */

#define GBM_FORMAT_ARGB8888        \
  __gbm_fourcc_code('A', 'R', '2', \
                    '4') /* [31:0] A:R:G:B 8:8:8:8 little endian */
#define GBM_FORMAT_ABGR8888        \
  __gbm_fourcc_code('A', 'B', '2', \
                    '4') /* [31:0] A:B:G:R 8:8:8:8 little endian */
#define GBM_FORMAT_RGBA8888        \
  __gbm_fourcc_code('R', 'A', '2', \
                    '4') /* [31:0] R:G:B:A 8:8:8:8 little endian */
#define GBM_FORMAT_BGRA8888        \
  __gbm_fourcc_code('B', 'A', '2', \
                    '4') /* [31:0] B:G:R:A 8:8:8:8 little endian */

#define GBM_FORMAT_XRGB2101010     \
  __gbm_fourcc_code('X', 'R', '3', \
                    '0') /* [31:0] x:R:G:B 2:10:10:10 little endian */
#define GBM_FORMAT_XBGR2101010     \
  __gbm_fourcc_code('X', 'B', '3', \
                    '0') /* [31:0] x:B:G:R 2:10:10:10 little endian */
#define GBM_FORMAT_RGBX1010102     \
  __gbm_fourcc_code('R', 'X', '3', \
                    '0') /* [31:0] R:G:B:x 10:10:10:2 little endian */
#define GBM_FORMAT_BGRX1010102     \
  __gbm_fourcc_code('B', 'X', '3', \
                    '0') /* [31:0] B:G:R:x 10:10:10:2 little endian */

#define GBM_FORMAT_ARGB2101010     \
  __gbm_fourcc_code('A', 'R', '3', \
                    '0') /* [31:0] A:R:G:B 2:10:10:10 little endian */
#define GBM_FORMAT_ABGR2101010     \
  __gbm_fourcc_code('A', 'B', '3', \
                    '0') /* [31:0] A:B:G:R 2:10:10:10 little endian */
#define GBM_FORMAT_RGBA1010102     \
  __gbm_fourcc_code('R', 'A', '3', \
                    '0') /* [31:0] R:G:B:A 10:10:10:2 little endian */
#define GBM_FORMAT_BGRA1010102     \
  __gbm_fourcc_code('B', 'A', '3', \
                    '0') /* [31:0] B:G:R:A 10:10:10:2 little endian */

/* packed YCbCr */
#define GBM_FORMAT_YUYV            \
  __gbm_fourcc_code('Y', 'U', 'Y', \
                    'V') /* [31:0] Cr0:Y1:Cb0:Y0 8:8:8:8 little endian */
#define GBM_FORMAT_YVYU            \
  __gbm_fourcc_code('Y', 'V', 'Y', \
                    'U') /* [31:0] Cb0:Y1:Cr0:Y0 8:8:8:8 little endian */
#define GBM_FORMAT_UYVY            \
  __gbm_fourcc_code('U', 'Y', 'V', \
                    'Y') /* [31:0] Y1:Cr0:Y0:Cb0 8:8:8:8 little endian */
#define GBM_FORMAT_VYUY            \
  __gbm_fourcc_code('V', 'Y', 'U', \
                    'Y') /* [31:0] Y1:Cb0:Y0:Cr0 8:8:8:8 little endian */

#define GBM_FORMAT_AYUV            \
  __gbm_fourcc_code('A', 'Y', 'U', \
                    'V') /* [31:0] A:Y:Cb:Cr 8:8:8:8 little endian */

/*
 * 2 plane YCbCr
 * index 0 = Y plane, [7:0] Y
 * index 1 = Cr:Cb plane, [15:0] Cr:Cb little endian
 * or
 * index 1 = Cb:Cr plane, [15:0] Cb:Cr little endian
 */
#define GBM_FORMAT_NV12 \
  __gbm_fourcc_code('N', 'V', '1', '2') /* 2x2 subsampled Cr:Cb plane */
#define GBM_FORMAT_NV21 \
  __gbm_fourcc_code('N', 'V', '2', '1') /* 2x2 subsampled Cb:Cr plane */
#define GBM_FORMAT_NV16 \
  __gbm_fourcc_code('N', 'V', '1', '6') /* 2x1 subsampled Cr:Cb plane */
#define GBM_FORMAT_NV61 \
  __gbm_fourcc_code('N', 'V', '6', '1') /* 2x1 subsampled Cb:Cr plane */

/*
 * 3 plane YCbCr
 * index 0: Y plane, [7:0] Y
 * index 1: Cb plane, [7:0] Cb
 * index 2: Cr plane, [7:0] Cr
 * or
 * index 1: Cr plane, [7:0] Cr
 * index 2: Cb plane, [7:0] Cb
 */
#define GBM_FORMAT_YUV410          \
  __gbm_fourcc_code('Y', 'U', 'V', \
                    '9') /* 4x4 subsampled Cb (1) and Cr (2) planes */
#define GBM_FORMAT_YVU410          \
  __gbm_fourcc_code('Y', 'V', 'U', \
                    '9') /* 4x4 subsampled Cr (1) and Cb (2) planes */
#define GBM_FORMAT_YUV411          \
  __gbm_fourcc_code('Y', 'U', '1', \
                    '1') /* 4x1 subsampled Cb (1) and Cr (2) planes */
#define GBM_FORMAT_YVU411          \
  __gbm_fourcc_code('Y', 'V', '1', \
                    '1') /* 4x1 subsampled Cr (1) and Cb (2) planes */
#define GBM_FORMAT_YUV420          \
  __gbm_fourcc_code('Y', 'U', '1', \
                    '2') /* 2x2 subsampled Cb (1) and Cr (2) planes */
#define GBM_FORMAT_YVU420          \
  __gbm_fourcc_code('Y', 'V', '1', \
                    '2') /* 2x2 subsampled Cr (1) and Cb (2) planes */
#define GBM_FORMAT_YUV422          \
  __gbm_fourcc_code('Y', 'U', '1', \
                    '6') /* 2x1 subsampled Cb (1) and Cr (2) planes */
#define GBM_FORMAT_YVU422          \
  __gbm_fourcc_code('Y', 'V', '1', \
                    '6') /* 2x1 subsampled Cr (1) and Cb (2) planes */
#define GBM_FORMAT_YUV444          \
  __gbm_fourcc_code('Y', 'U', '2', \
                    '4') /* non-subsampled Cb (1) and Cr (2) planes */
#define GBM_FORMAT_YVU444          \
  __gbm_fourcc_code('Y', 'V', '2', \
                    '4') /* non-subsampled Cr (1) and Cb (2) planes */

struct gbm_format_name_desc {
  char name[5];
};

/**
 * Flags to indicate the intended use for the buffer - these are passed into
 * gbm_bo_create(). The caller must set the union of all the flags that are
 * appropriate
 *
 * \sa Use gbm_device_is_format_supported() to check if the combination of
 * format and use flags are supported
 */
enum gbm_bo_flags {
  /**
   * Buffer is going to be presented to the screen using an API such as KMS
   */
  GBM_BO_USE_SCANOUT = (1 << 0),
  /**
   * Buffer is going to be used as cursor
   */
  GBM_BO_USE_CURSOR = (1 << 1),
  /**
   * Deprecated
   */
  GBM_BO_USE_CURSOR_64X64 = GBM_BO_USE_CURSOR,
  /**
   * Buffer is to be used for rendering - for example it is going to be used
   * as the storage for a color buffer
   */
  GBM_BO_USE_RENDERING = (1 << 2),
  /**
   * Buffer can be used for gbm_bo_write.  This is guaranteed to work
   * with GBM_BO_USE_CURSOR, but may not work for other combinations.
   */
  GBM_BO_USE_WRITE = (1 << 3),
  /**
   * Buffer is linear, i.e. not tiled.
   */
  GBM_BO_USE_LINEAR = (1 << 4),
};

int gbm_device_get_fd(struct gbm_device* gbm);

const char* gbm_device_get_backend_name(struct gbm_device* gbm);

int gbm_device_is_format_supported(struct gbm_device* gbm, uint32_t format,
                                   uint32_t usage);

int gbm_device_get_format_modifier_plane_count(struct gbm_device* gbm,
                                               uint32_t format,
                                               uint64_t modifier);

void gbm_device_destroy(struct gbm_device* gbm);

struct gbm_device* gbm_create_device(int fd);

struct gbm_bo* gbm_bo_create(struct gbm_device* gbm, uint32_t width,
                             uint32_t height, uint32_t format, uint32_t flags);

struct gbm_bo* gbm_bo_create_with_modifiers(struct gbm_device* gbm,
                                            uint32_t width, uint32_t height,
                                            uint32_t format,
                                            const uint64_t* modifiers,
                                            const unsigned int count);
#define GBM_BO_IMPORT_WL_BUFFER 0x5501
#define GBM_BO_IMPORT_EGL_IMAGE 0x5502
#define GBM_BO_IMPORT_FD 0x5503
#define GBM_BO_IMPORT_FD_MODIFIER 0x5504

struct gbm_import_fd_data {
  int fd;
  uint32_t width;
  uint32_t height;
  uint32_t stride;
  uint32_t format;
};

struct gbm_import_fd_modifier_data {
  uint32_t width;
  uint32_t height;
  uint32_t format;
  uint32_t num_fds;
  int fds[4];
  int strides[4];
  int offsets[4];
  uint64_t modifier;
};

struct gbm_bo* gbm_bo_import(struct gbm_device* gbm, uint32_t type,
                             void* buffer, uint32_t usage);

/**
 * Flags to indicate the type of mapping for the buffer - these are
 * passed into gbm_bo_map(). The caller must set the union of all the
 * flags that are appropriate.
 *
 * These flags are independent of the GBM_BO_USE_* creation flags. However,
 * mapping the buffer may require copying to/from a staging buffer.
 *
 * See also: pipe_transfer_usage
 */
enum gbm_bo_transfer_flags {
  /**
   * Buffer contents read back (or accessed directly) at transfer
   * create time.
   */
  GBM_BO_TRANSFER_READ = (1 << 0),
  /**
   * Buffer contents will be written back at unmap time
   * (or modified as a result of being accessed directly).
   */
  GBM_BO_TRANSFER_WRITE = (1 << 1),
  /**
   * Read/modify/write
   */
  GBM_BO_TRANSFER_READ_WRITE = (GBM_BO_TRANSFER_READ | GBM_BO_TRANSFER_WRITE),
};

void* gbm_bo_map(struct gbm_bo* bo, uint32_t x, uint32_t y, uint32_t width,
                 uint32_t height, uint32_t flags, uint32_t* stride,
                 void** map_data);

void gbm_bo_unmap(struct gbm_bo* bo, void* map_data);

uint32_t gbm_bo_get_width(struct gbm_bo* bo);

uint32_t gbm_bo_get_height(struct gbm_bo* bo);

uint32_t gbm_bo_get_stride(struct gbm_bo* bo);

uint32_t gbm_bo_get_stride_for_plane(struct gbm_bo* bo, int plane);

uint32_t gbm_bo_get_format(struct gbm_bo* bo);

uint32_t gbm_bo_get_bpp(struct gbm_bo* bo);

uint32_t gbm_bo_get_offset(struct gbm_bo* bo, int plane);

struct gbm_device* gbm_bo_get_device(struct gbm_bo* bo);

union gbm_bo_handle gbm_bo_get_handle(struct gbm_bo* bo);

int gbm_bo_get_fd(struct gbm_bo* bo);

uint64_t gbm_bo_get_modifier(struct gbm_bo* bo);

int gbm_bo_get_plane_count(struct gbm_bo* bo);

union gbm_bo_handle gbm_bo_get_handle_for_plane(struct gbm_bo* bo, int plane);

int gbm_bo_write(struct gbm_bo* bo, const void* buf, size_t count);

void gbm_bo_set_user_data(struct gbm_bo* bo, void* data,
                          void (*destroy_user_data)(struct gbm_bo*, void*));

void* gbm_bo_get_user_data(struct gbm_bo* bo);

void gbm_bo_destroy(struct gbm_bo* bo);

struct gbm_surface* gbm_surface_create(struct gbm_device* gbm, uint32_t width,
                                       uint32_t height, uint32_t format,
                                       uint32_t flags);

struct gbm_surface* gbm_surface_create_with_modifiers(
    struct gbm_device* gbm, uint32_t width, uint32_t height, uint32_t format,
    const uint64_t* modifiers, const unsigned int count);

struct gbm_bo* gbm_surface_lock_front_buffer(struct gbm_surface* surface);

void gbm_surface_release_buffer(struct gbm_surface* surface, struct gbm_bo* bo);

int gbm_surface_has_free_buffers(struct gbm_surface* surface);

void gbm_surface_destroy(struct gbm_surface* surface);

char* gbm_format_get_name(uint32_t gbm_format,
                          struct gbm_format_name_desc* desc);

#ifdef __cplusplus
}
#endif

#endif