/*
Copyright 1999-2014 ImageMagick Studio LLC, a non-profit organization
dedicated to making software imaging solutions freely available.

You may not use this file except in compliance with the License.
obtain a copy of the License at

http://www.imagemagick.org/script/license.php

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.

MagickCore OpenCL private methods.
*/
#ifndef _MAGICKCORE_OPENCL_PRIVATE_H
#define _MAGICKCORE_OPENCL_PRIVATE_H

/*
Include declarations.
*/
#include "MagickCore/studio.h"
#include "MagickCore/opencl.h"

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

#if !defined(MAGICKCORE_OPENCL_SUPPORT)
  typedef void* cl_platform_id;
  typedef void* cl_device_id;
  typedef void* cl_context;
  typedef void* cl_command_queue;
  typedef void* cl_kernel;
  typedef void* cl_mem;
  typedef struct { unsigned char t[8]; } cl_device_type; /* 64-bit */
#else
/*
 *
 * function pointer typedefs
 *
 */

/* Platform APIs */
typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clGetPlatformIDs)(
                 cl_uint          num_entries,
                 cl_platform_id * platforms,
                 cl_uint *        num_platforms) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clGetPlatformInfo)(
    cl_platform_id   platform, 
    cl_platform_info param_name,
    size_t           param_value_size, 
    void *           param_value,
    size_t *         param_value_size_ret) CL_API_SUFFIX__VERSION_1_0;

/* Device APIs */
typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clGetDeviceIDs)(
    cl_platform_id   platform,
    cl_device_type   device_type, 
    cl_uint          num_entries, 
    cl_device_id *   devices, 
    cl_uint *        num_devices) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clGetDeviceInfo)(
    cl_device_id    device,
    cl_device_info  param_name, 
    size_t          param_value_size, 
    void *          param_value,
    size_t *        param_value_size_ret) CL_API_SUFFIX__VERSION_1_0;

/* Context APIs */
typedef CL_API_ENTRY cl_context (CL_API_CALL *MAGICKpfn_clCreateContext)(
    const cl_context_properties * properties,
    cl_uint                 num_devices,
    const cl_device_id *    devices,
    void (CL_CALLBACK *pfn_notify)(const char *, const void *, size_t, void *),
    void *                  user_data,
    cl_int *                errcode_ret) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clReleaseContext)(
    cl_context context) CL_API_SUFFIX__VERSION_1_0;

/* Command Queue APIs */
typedef CL_API_ENTRY cl_command_queue (CL_API_CALL *MAGICKpfn_clCreateCommandQueue)(
    cl_context                     context, 
    cl_device_id                   device, 
    cl_command_queue_properties    properties,
    cl_int *                       errcode_ret) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clReleaseCommandQueue)(
    cl_command_queue command_queue) CL_API_SUFFIX__VERSION_1_0;

/* Memory Object APIs */
typedef CL_API_ENTRY cl_mem (CL_API_CALL *MAGICKpfn_clCreateBuffer)(
    cl_context   context,
    cl_mem_flags flags,
    size_t       size,
    void *       host_ptr,
    cl_int *     errcode_ret) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clReleaseMemObject)(cl_mem memobj) CL_API_SUFFIX__VERSION_1_0;

/* Program Object APIs */
typedef CL_API_ENTRY cl_program (CL_API_CALL *MAGICKpfn_clCreateProgramWithSource)(
    cl_context        context,
    cl_uint           count,
    const char **     strings,
    const size_t *    lengths,
    cl_int *          errcode_ret) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_program (CL_API_CALL *MAGICKpfn_clCreateProgramWithBinary)(
    cl_context                     context,
    cl_uint                        num_devices,
    const cl_device_id *           device_list,
    const size_t *                 lengths,
    const unsigned char **         binaries,
    cl_int *                       binary_status,
    cl_int *                       errcode_ret) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clReleaseProgram)(cl_program program) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clBuildProgram)(
    cl_program           program,
    cl_uint              num_devices,
    const cl_device_id * device_list,
    const char *         options, 
    void (CL_CALLBACK *pfn_notify)(cl_program program, void * user_data),
    void *               user_data) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clGetProgramInfo)(
    cl_program         program,
    cl_program_info    param_name,
    size_t             param_value_size,
    void *             param_value,
    size_t *           param_value_size_ret) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clGetProgramBuildInfo)(
    cl_program            program,
    cl_device_id          device,
    cl_program_build_info param_name,
    size_t                param_value_size,
    void *                param_value,
    size_t *              param_value_size_ret) CL_API_SUFFIX__VERSION_1_0;
                            
/* Kernel Object APIs */
typedef CL_API_ENTRY cl_kernel (CL_API_CALL *MAGICKpfn_clCreateKernel)(
    cl_program      program,
    const char *    kernel_name,
    cl_int *        errcode_ret) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clReleaseKernel)(cl_kernel   kernel) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clSetKernelArg)(
    cl_kernel    kernel,
    cl_uint      arg_index,
    size_t       arg_size,
    const void * arg_value) CL_API_SUFFIX__VERSION_1_0;

/* Flush and Finish APIs */
typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clFlush)(cl_command_queue command_queue) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clFinish)(cl_command_queue command_queue) CL_API_SUFFIX__VERSION_1_0;

/* Enqueued Commands APIs */
typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clEnqueueReadBuffer)(
    cl_command_queue    command_queue,
    cl_mem              buffer,
    cl_bool             blocking_read,
    size_t              offset,
    size_t              cb, 
    void *              ptr,
    cl_uint             num_events_in_wait_list,
    const cl_event *    event_wait_list,
    cl_event *          event) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clEnqueueWriteBuffer)(
    cl_command_queue   command_queue, 
    cl_mem             buffer, 
    cl_bool            blocking_write, 
    size_t             offset, 
    size_t             cb, 
    const void *       ptr, 
    cl_uint            num_events_in_wait_list, 
    const cl_event *   event_wait_list, 
    cl_event *         event) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY void * (CL_API_CALL *MAGICKpfn_clEnqueueMapBuffer)(
    cl_command_queue command_queue,
    cl_mem           buffer,
    cl_bool          blocking_map, 
    cl_map_flags     map_flags,
    size_t           offset,
    size_t           cb,
    cl_uint          num_events_in_wait_list,
    const cl_event * event_wait_list,
    cl_event *       event,
    cl_int *         errcode_ret) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clEnqueueUnmapMemObject)(
    cl_command_queue command_queue,
    cl_mem           memobj,
    void *           mapped_ptr,
    cl_uint          num_events_in_wait_list,
    const cl_event *  event_wait_list,
    cl_event *        event) CL_API_SUFFIX__VERSION_1_0;

typedef CL_API_ENTRY cl_int (CL_API_CALL *MAGICKpfn_clEnqueueNDRangeKernel)(
    cl_command_queue command_queue,
    cl_kernel        kernel,
    cl_uint          work_dim,
    const size_t *   global_work_offset,
    const size_t *   global_work_size,
    const size_t *   local_work_size,
    cl_uint          num_events_in_wait_list,
    const cl_event * event_wait_list,
    cl_event *       event) CL_API_SUFFIX__VERSION_1_0;

/*
 *
 * vendor dispatch table structure
 *
 * note that the types in the structure KHRicdVendorDispatch mirror the function 
 * names listed in the string table khrIcdVendorDispatchFunctionNames
 *
 */

typedef struct MagickLibraryRec MagickLibrary;

struct MagickLibraryRec
{
  void * base;

  MAGICKpfn_clGetPlatformIDs                         clGetPlatformIDs;
  MAGICKpfn_clGetPlatformInfo                        clGetPlatformInfo;
  MAGICKpfn_clGetDeviceIDs                           clGetDeviceIDs;
  MAGICKpfn_clGetDeviceInfo                          clGetDeviceInfo;
  MAGICKpfn_clCreateContext                          clCreateContext;
  MAGICKpfn_clCreateCommandQueue                     clCreateCommandQueue;
  MAGICKpfn_clReleaseCommandQueue                    clReleaseCommandQueue;
  MAGICKpfn_clCreateBuffer                           clCreateBuffer;
  MAGICKpfn_clReleaseMemObject                       clReleaseMemObject;
  MAGICKpfn_clCreateProgramWithSource                clCreateProgramWithSource;
  MAGICKpfn_clCreateProgramWithBinary                clCreateProgramWithBinary;
  MAGICKpfn_clReleaseProgram                         clReleaseProgram;
  MAGICKpfn_clBuildProgram                           clBuildProgram;
  MAGICKpfn_clGetProgramInfo                         clGetProgramInfo;
  MAGICKpfn_clGetProgramBuildInfo                    clGetProgramBuildInfo;
  MAGICKpfn_clCreateKernel                           clCreateKernel;
  MAGICKpfn_clReleaseKernel                          clReleaseKernel;
  MAGICKpfn_clSetKernelArg                           clSetKernelArg;
  MAGICKpfn_clFlush                                  clFlush;
  MAGICKpfn_clFinish                                 clFinish;
  MAGICKpfn_clEnqueueReadBuffer                      clEnqueueReadBuffer;
  MAGICKpfn_clEnqueueWriteBuffer                     clEnqueueWriteBuffer;
  MAGICKpfn_clEnqueueMapBuffer                       clEnqueueMapBuffer;
  MAGICKpfn_clEnqueueUnmapMemObject                  clEnqueueUnmapMemObject;
  MAGICKpfn_clEnqueueNDRangeKernel                   clEnqueueNDRangeKernel;
};

struct _MagickCLEnv {
  MagickBooleanType OpenCLInitialized;  /* whether OpenCL environment is initialized. */
  MagickBooleanType OpenCLDisabled;	/* whether if OpenCL has been explicitely disabled. */

  MagickLibrary * library;

  /*OpenCL objects */
  cl_platform_id platform;
  cl_device_type deviceType;
  cl_device_id device;
  cl_context context;

  MagickBooleanType disableProgramCache; /* disable the OpenCL program cache */
  cl_program programs[MAGICK_OPENCL_NUM_PROGRAMS]; /* one program object maps one kernel source file */

  MagickBooleanType regenerateProfile;   /* re-run the microbenchmark in auto device selection mode */ 

  /* Random number generator seeds */
  unsigned int numGenerators;
  float randNormalize;
  cl_mem seeds;
  SemaphoreInfo* seedsLock;

  SemaphoreInfo* lock;
};

#endif

#if defined(MAGICKCORE_HDRI_SUPPORT)
#define CLOptions "-cl-single-precision-constant -cl-mad-enable -DMAGICKCORE_HDRI_SUPPORT=1 "\
  "-DCLQuantum=float -DCLSignedQuantum=float -DCLPixelType=float4 -DQuantumRange=%f " \
  "-DQuantumScale=%f -DCharQuantumScale=%f -DMagickEpsilon=%f -DMagickPI=%f "\
  " -DMaxMap=%u -DMAGICKCORE_QUANTUM_DEPTH=%u"
#define CLPixelPacket  cl_float4
#define CLCharQuantumScale 1.0f
#elif (MAGICKCORE_QUANTUM_DEPTH == 8)
#define CLOptions "-cl-single-precision-constant -cl-mad-enable " \
  "-DCLQuantum=uchar -DCLSignedQuantum=char -DCLPixelType=uchar4 -DQuantumRange=%ff " \
  "-DQuantumScale=%ff -DCharQuantumScale=%ff -DMagickEpsilon=%ff -DMagickPI=%ff "\
  "-DMaxMap=%u -DMAGICKCORE_QUANTUM_DEPTH=%u"
#define CLPixelPacket  cl_uchar4
#define CLCharQuantumScale 1.0f
#elif (MAGICKCORE_QUANTUM_DEPTH == 16)
#define CLOptions "-cl-single-precision-constant -cl-mad-enable " \
  "-DCLQuantum=ushort -DCLSignedQuantum=short -DCLPixelType=ushort4 -DQuantumRange=%f "\
  "-DQuantumScale=%f -DCharQuantumScale=%f -DMagickEpsilon=%f -DMagickPI=%f "\
  "-DMaxMap=%u -DMAGICKCORE_QUANTUM_DEPTH=%u"
#define CLPixelPacket  cl_ushort4
#define CLCharQuantumScale 257.0f
#elif (MAGICKCORE_QUANTUM_DEPTH == 32)
#define CLOptions "-cl-single-precision-constant -cl-mad-enable " \
  "-DCLQuantum=uint -DCLSignedQuantum=int -DCLPixelType=uint4 -DQuantumRange=%f "\
  "-DQuantumScale=%f -DCharQuantumScale=%f -DMagickEpsilon=%f -DMagickPI=%f "\
  "-DMaxMap=%u -DMAGICKCORE_QUANTUM_DEPTH=%u"
#define CLPixelPacket  cl_uint4
#define CLCharQuantumScale 16843009.0f
#elif (MAGICKCORE_QUANTUM_DEPTH == 64)
#define CLOptions "-cl-single-precision-constant -cl-mad-enable " \
  "-DCLQuantum=ulong -DCLSignedQuantum=long -DCLPixelType=ulong4 -DQuantumRange=%f "\
  "-DQuantumScale=%f -DCharQuantumScale=%f -DMagickEpsilon=%f -DMagickPI=%f "\
  "-DMaxMap=%u -DMAGICKCORE_QUANTUM_DEPTH=%u"
#define CLPixelPacket  cl_ulong4
#define CLCharQuantumScale 72340172838076673.0f
#endif

extern MagickPrivate cl_context 
  GetOpenCLContext(MagickCLEnv);

extern MagickPrivate cl_kernel 
  AcquireOpenCLKernel(MagickCLEnv, MagickOpenCLProgram, const char*);

extern MagickPrivate cl_command_queue 
  AcquireOpenCLCommandQueue(MagickCLEnv);

extern MagickPrivate MagickBooleanType 
  OpenCLThrowMagickException(ExceptionInfo *,
    const char *,const char *,const size_t,
    const ExceptionType,const char *,const char *,...),
  RelinquishOpenCLCommandQueue(MagickCLEnv, cl_command_queue),
  RelinquishOpenCLKernel(MagickCLEnv, cl_kernel);

extern MagickPrivate unsigned long 
  GetOpenCLDeviceLocalMemorySize(MagickCLEnv),
  GetOpenCLDeviceMaxMemAllocSize(MagickCLEnv);

extern MagickPrivate const char* 
  GetOpenCLCachedFilesDirectory();

extern MagickPrivate void
  UnlockRandSeedBuffer(MagickCLEnv),
  OpenCLLog(const char*);

extern MagickPrivate cl_mem 
  GetAndLockRandSeedBuffer(MagickCLEnv);

extern MagickPrivate unsigned int 
  GetNumRandGenerators(MagickCLEnv);

extern MagickPrivate float 
  GetRandNormalize(MagickCLEnv clEnv);

typedef struct _AccelerateTimer {
  long long _freq;	
  long long _clocks;
  long long _start;
} AccelerateTimer;


void startAccelerateTimer(AccelerateTimer* timer);
void stopAccelerateTimer(AccelerateTimer* timer);
void resetAccelerateTimer(AccelerateTimer* timer);
void initAccelerateTimer(AccelerateTimer* timer);
double readAccelerateTimer(AccelerateTimer* timer);

/* #define OPENCLLOG_ENABLED 1 */
static inline void OpenCLLogException(const char* function, 
                        const unsigned int line, 
                        ExceptionInfo* exception) {
#ifdef OPENCLLOG_ENABLED
  if (exception->severity!=0) {
    char message[MaxTextExtent];
    /*  dump the source into a file */
    (void) FormatLocaleString(message,MaxTextExtent,"%s:%d Exception(%d):%s "
        ,function,line,exception->severity,exception->reason);
    OpenCLLog(message);
  }
#else
  magick_unreferenced(function);
  magick_unreferenced(line);
  magick_unreferenced(exception);
#endif
}


#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

#endif