//=====================================================================
// Copyright (c) 2021    Advanced Micro Devices, Inc. All rights reserved.
//
// 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 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.
//
/// \file BC1.cpp
//
//=====================================================================

#include "bcn.h"
#include "bc1.h"

#ifdef USE_TIMERS
#include "query_timer.h"
#endif

//#define BUILD_AS_PLUGIN_DLL

#ifdef USE_CONVECTION_KERNELS
#pragma comment(lib, "convectionkernels.lib")
#include "convectionkernels.h"
using namespace cvtt;
#endif


#ifdef BUILD_AS_PLUGIN_DLL
DECLARE_PLUGIN(Plugin_BC1)
SET_PLUGIN_TYPE("ENCODER")
SET_PLUGIN_NAME("BC1")
#else
void *make_Plugin_BC1() {
    return new Plugin_BC1;
}
#endif

CMP_BC15Options  g_BC1Encode;

#define GPU_OCL_BC1_COMPUTEFILE      "./plugins/Compute/BC1_Encode_kernel.cpp"
#define GPU_DXC_BC1_COMPUTEFILE      "./plugins/Compute/BC1_Encode_kernel.hlsl"

void  CompressBlockBC1_Internal(
    const CMP_Vec4uc  srcBlockTemp[16],
    CMP_GLOBAL  CGU_UINT32      compressedBlock[2],
    CMP_GLOBAL  CMP_BC15Options *BC15options);

Plugin_BC1::Plugin_BC1() {
    m_KernelOptions = NULL;
}

Plugin_BC1::~Plugin_BC1() {
}

int Plugin_BC1::TC_PluginSetSharedIO(void* Shared) {
    CMips = reinterpret_cast<CMIPS *> (Shared);
    return 0;
}

int Plugin_BC1::TC_PluginGetVersion(TC_PluginVersion* pPluginVersion) {
    pPluginVersion->guid                    = g_GUID;
    pPluginVersion->dwAPIVersionMajor       = TC_API_VERSION_MAJOR;
    pPluginVersion->dwAPIVersionMinor       = TC_API_VERSION_MINOR;
    pPluginVersion->dwPluginVersionMajor    = TC_PLUGIN_VERSION_MAJOR;
    pPluginVersion->dwPluginVersionMinor    = TC_PLUGIN_VERSION_MINOR;
    return 0;
}

void* Plugin_BC1::TC_Create() {
    return (void*) new BC1_EncodeClass();
}

void  Plugin_BC1::TC_Destroy(void* codec) {
    if (codec != nullptr) {
        BC1_EncodeClass* pcodec;
        pcodec = reinterpret_cast<BC1_EncodeClass*>(codec);
        delete pcodec;
        codec = nullptr;
    }
}

char *Plugin_BC1::TC_ComputeSourceFile(CGU_UINT32  Compute_type) {
    switch (Compute_type) {
    case CMP_Compute_type::CMP_GPU_OCL:
        return(GPU_OCL_BC1_COMPUTEFILE);
    case CMP_Compute_type::CMP_GPU_DXC:
        return(GPU_DXC_BC1_COMPUTEFILE);
    }
    return ("");
}

void Plugin_BC1::TC_Start() {};
void Plugin_BC1::TC_End() {};



int Plugin_BC1::TC_Init(void  *kernel_options) {
    if (!kernel_options)    return (-1);
    m_KernelOptions = reinterpret_cast<KernelOptions *>(kernel_options);

    memset(&g_BC1Encode, 0, sizeof(CMP_BC15Options));

    SetDefaultBC15Options(&g_BC1Encode);

    SetUserBC15EncoderOptions(&g_BC1Encode,m_KernelOptions);

    g_BC1Encode.m_src_width  = m_KernelOptions->width;
    g_BC1Encode.m_src_height = m_KernelOptions->height;
    g_BC1Encode.m_fquality   = m_KernelOptions->fquality;



    m_KernelOptions->data = &g_BC1Encode;
    m_KernelOptions->size = sizeof(g_BC1Encode);

    return(0);
}

int BC1_EncodeClass::DecompressBlock(void *cmpin, void *srcout) {
    if (srcout == NULL) return -1;
    if (cmpin  == NULL) return -1;
    return 0;
}

int BC1_EncodeClass::DecompressBlock(CGU_UINT32 xBlock, CGU_UINT32 yBlock, void *cmpin, void *srcout) {
    if ((xBlock != 0) && (yBlock != 0)) return -1;
    if (srcout == NULL) return -1;
    if (cmpin == NULL) return -1;
    return 0;
}


int BC1_EncodeClass::CompressBlock(void *srcin, void *cmpout, void *blockoptions) {
    CMP_BC15Options  *BC1Encode = reinterpret_cast<CMP_BC15Options *>(blockoptions);
    if (BC1Encode == NULL)  return -1;
    if (srcin  == NULL)     return -1;
    if (cmpout == NULL)     return -1;
    return 0;
}

int BC1_EncodeClass::CompressTexture(void *srcin, void *cmpout,void *processOptions) {
    (processOptions);
    if (srcin == NULL) return -1;
    if (cmpout == NULL) return -1;

    MipSet* pSourceTexture =  reinterpret_cast<MipSet *>(srcin);

    CMP_DWORD src_height       = pSourceTexture->dwHeight;
    CMP_DWORD src_width      = pSourceTexture->dwWidth;

    CMP_DWORD width_in_blocks = src_width / 4;
    CMP_DWORD height_in_blocks = src_height / 4;
    int stride = src_width * BYTEPP;
    int blockOffset = 0;
    int srcidx;

#ifdef USE_CONVECTION_KERNELS
    PixelBlockU8 pBlocks[8] = {0};
    CMP_BYTE results[64]; // 8 x 8
#endif

    for (CMP_DWORD by = 0; by < height_in_blocks; by++) {
        for (CMP_DWORD bx = 0; bx < width_in_blocks; bx++) {
            int srcOffset = (bx*BlockX*BYTEPP) + (by*stride*BYTEPP);

            // Copy src block into Texel
            blockOffset = 0;
            for (CMP_DWORD i = 0; i < BlockX; i++) {
                srcidx = i*stride;
                for (CMP_DWORD j = 0; j < BlockY; j++) {
                    unsigned char R,G,B,A;
                    R = (pSourceTexture->pData[srcOffset + srcidx++]);
                    G = (pSourceTexture->pData[srcOffset + srcidx++]);
                    B = (pSourceTexture->pData[srcOffset + srcidx++]);
                    A = (pSourceTexture->pData[srcOffset + srcidx++]);

                    //printf("[%2d,%2d] [%2d][%2d] %2d,%2d,%2d,%2d\n",bx,by,numBlocks,blockOffset,R,G,B,A);
#ifdef USE_CONVECTION_KERNELS
                    pBlocks[numBlocks].m_pixels[blockOffset][0] = R;
                    pBlocks[numBlocks].m_pixels[blockOffset][1] = G;
                    pBlocks[numBlocks].m_pixels[blockOffset][2] = B;
                    pBlocks[numBlocks].m_pixels[blockOffset][3] = A;
#endif
                    blockOffset++;
                }
            }

#ifdef USE_CONVECTION_KERNELS
            numBlocks++;
            numBlocksProcessed++;

            // we are at 8 blocks
            if ((numBlocks == 8)||( numBlocksProcessed >= maxBlocks)) {
                cvtt::Options options;
                options.flags = Flags::Default;
                Kernels::EncodeBC1(results,pBlocks,options);

                // save results
                for (int i=0; i< numBlocks; i++) {
                    for (int j=0; j<8; j++) {
                        pdest[j] = results[i*8+j];
                    }
                    pdest += 8; // next comp data block to store results
                }
                numBlocks = 0;
            }
#endif

        }
    }

    return 0;
}

int BC1_EncodeClass::DecompressTexture(void *cmpin, void *srcout,void *processOptions) {
    // ToDo: Implement texture level decompression
    if (processOptions == NULL) return -1;
    if (srcout == NULL) return -1;
    if (cmpin == NULL) return -1;

    // MipSet* pSourceTexture =  reinterpret_cast<MipSet *>(cmpin);
    // MipSet* pDestTexture   =  reinterpret_cast<MipSet *>(srcout);
    return 0;
}

int BC1_EncodeClass::CompressBlock(CGU_UINT32 xBlock, CGU_UINT32 yBlock, void *srcin, void *cmpout) {
    CMP_Vec4uc *ImageSource        = (CMP_Vec4uc *)srcin;
    CGU_UINT8  *compressedBlocks   = (CGU_UINT8  *)cmpout;

    // if the srcWidth and srcHeight is not set try using the alternate user setting
    // that was set by user for block level codec access!
    if ((m_srcHeight == 0)||(m_srcWidth==0)) {
        return (-1);
    }

    int width_in_blocks  = (m_srcWidth + 3) >> 2;

    CGU_UINT32 srcStride = m_srcWidth*4;
    CGU_UINT32 dstStride = width_in_blocks * BC1CompBlockSize;

    // user override!
    if (m_srcStride > 0) srcStride = m_srcStride;
    if (m_dstStride > 0) dstStride = m_dstStride;

    CGU_UINT32 destI = (xBlock * BC1CompBlockSize) + (yBlock*dstStride);
    int srcindex = (yBlock * srcStride) + (4*xBlock);
    int blkindex = 0;

    CMP_Vec4uc srcData[16];

    //Check if it is a complete 4X4 block
    if (((xBlock + 1)*BlockX <= m_srcWidth) && ((yBlock + 1)*BlockY <= m_srcHeight)) {
        for (int j = 0; j < 4; j++) {
            for (int i = 0; i < 4; i++) {
                memcpy(&srcData[blkindex++], &ImageSource[srcindex++], sizeof(CMP_Vec4uc));
            }
            srcindex += (m_srcWidth - 4);
        }
    } else {
        CMP_DWORD dwWidth = CMP_MIN(static_cast<unsigned int>(BlockX), m_srcWidth - xBlock*BlockX);
        CMP_DWORD i, j, srcIndex;

        //Go through line by line
        for (j = 0; j < BlockY && (BlockY * yBlock + j) < m_srcHeight; j++) {
            //Copy the real data
            srcIndex = ((yBlock * BlockY + j) * m_srcWidth + (xBlock * BlockX));
            for (i = 0; i < dwWidth; i++) {
                memcpy(&srcData[j*BlockX + i], &ImageSource[srcIndex + i], sizeof(CMP_Vec4uc));
            }
            if (i < BlockX)
                PadLine(i, BlockX, 4, (CMP_BYTE*)&srcData[j * BlockX]);
        }
        if (j < BlockY)
            PadBlock(j, BlockX, BlockY, 4, (CMP_BYTE*)srcData);
    }

#ifdef USE_TIMERS
    static int init = false;
    if (!init) {
        query_timer::initialize();
        init = true;
    }
    {
        QUERY_PERFORMANCE("BC1");
#endif

        CompressBlockBC1_Internal(srcData, (CGU_UINT32 *)&compressedBlocks[destI],&g_BC1Encode);

#ifdef USE_TIMERS
    } // Query

    static int sum   = 0;
    static int count = 0;
    if (query_timer::m_elapsed_count < 30) {
        sum += (int)query_timer::m_elapsed_count;
        count++;
        printf("BC1 %f\n",(CGU_FLOAT)sum/(CGU_FLOAT)count);
    }
#endif
    return (0);
}