// Copyright (C) 2003-2009 Dolphin Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

#include "Common.h"

#include "main.h"
#include "DebugUtil.h"
#include "BPMemLoader.h"
#include "TextureSampler.h"
#include "VideoConfig.h"
#include "EfbInterface.h"
#include "Statistics.h"
#include "HwRasterizer.h"
#include "StringUtil.h"
#include "CommandProcessor.h"
#include "../../../Core/VideoCommon/Src/ImageWrite.h"
#include "FileUtil.h"

namespace DebugUtil
{

u32 skipFrames = 0;
bool drawingHwTriangles = false;

enum { NumObjectBuffers = 40};

u32 ObjectBuffer[NumObjectBuffers][EFB_WIDTH*EFB_HEIGHT];
u32 TempBuffer[NumObjectBuffers];

bool DrawnToBuffer[NumObjectBuffers];
const char* ObjectBufferName[NumObjectBuffers];
int BufferBase[NumObjectBuffers];

void Init()
{
    for (int i = 0; i < NumObjectBuffers; i++)
    {
        memset(ObjectBuffer[i], 0, sizeof(ObjectBuffer[i]));
        DrawnToBuffer[i] = false;
        ObjectBufferName[i] = 0;
		BufferBase[i] = 0;
    }
}

void SaveTexture(const char* filename, u32 texmap, s32 mip)
{
    FourTexUnits& texUnit = bpmem.tex[(texmap >> 2) & 1];
    u8 subTexmap = texmap & 3;

    TexImage0& ti0 = texUnit.texImage0[subTexmap];

	int width = ti0.width + 1;
	int height = ti0.height + 1;

	u8 *data = new u8[width * height * 4];
    
    GetTextureBGRA(data, texmap, mip, width, height);

    (void)SaveTGA(filename, width, height, data);

    delete []data;
}

void GetTextureBGRA(u8 *dst, u32 texmap, s32 mip, int width, int height)
{
    u8 sample[4];    

    for (int y = 0; y < height; y++)
        for (int x = 0; x < width; x++) {
            TextureSampler::SampleMip(x << 7, y << 7, mip, false, texmap, sample);
            // rgba to bgra
            *(dst++) = sample[2];
            *(dst++) = sample[1];
            *(dst++) = sample[0];
            *(dst++) = sample[3];
        }
}

s32 GetMaxTextureLod(u32 texmap)
{
	FourTexUnits& texUnit = bpmem.tex[(texmap >> 2) & 1];
    u8 subTexmap = texmap & 3;

	u8 maxLod = texUnit.texMode1[subTexmap].max_lod;
	u8 mip = maxLod >> 4;
	u8 fract = maxLod & 0xf;

	if(fract)
		++mip;

	return (s32)mip;
}

void DumpActiveTextures()
{
    for (unsigned int stageNum = 0; stageNum < bpmem.genMode.numindstages; stageNum++)
    {
        u32 texmap = bpmem.tevindref.getTexMap(stageNum);

		s32 maxLod = GetMaxTextureLod(texmap);
		for (s32 mip = 0; mip <= maxLod; ++mip)
		{
			SaveTexture(StringFromFormat("%star%i_ind%i_map%i_mip%i.tga", File::GetUserPath(D_DUMPTEXTURES_IDX), stats.thisFrame.numDrawnObjects, stageNum, texmap, mip).c_str(), texmap, mip);
		}
    }

    for (unsigned int stageNum = 0; stageNum <= bpmem.genMode.numtevstages; stageNum++)
    {
        int stageNum2 = stageNum >> 1;
        int stageOdd = stageNum&1;
        TwoTevStageOrders &order = bpmem.tevorders[stageNum2];

        int texmap = order.getTexMap(stageOdd);

        s32 maxLod = GetMaxTextureLod(texmap);
		for (s32 mip = 0; mip <= maxLod; ++mip)
		{
			SaveTexture(StringFromFormat("%star%i_stage%i_map%i_mip%i.tga", File::GetUserPath(D_DUMPTEXTURES_IDX), stats.thisFrame.numDrawnObjects, stageNum, texmap, mip).c_str(), texmap, mip);
		}
    }
}

void DumpEfb(const char* filename)
{
    u8 *data = new u8[EFB_WIDTH * EFB_HEIGHT * 4];
    u8 *writePtr = data;
    u8 sample[4];    

    for (int y = 0; y < EFB_HEIGHT; y++)
        for (int x = 0; x < EFB_WIDTH; x++) {
            EfbInterface::GetColor(x, y, sample);
            // ABGR to BGRA
            *(writePtr++) = sample[1];
            *(writePtr++) = sample[2];
            *(writePtr++) = sample[3];
            *(writePtr++) = sample[0];
        }

    (void)SaveTGA(filename, EFB_WIDTH, EFB_HEIGHT, data);

    delete []data;
}

void DumpDepth(const char* filename)
{
    u8 *data = new u8[EFB_WIDTH * EFB_HEIGHT * 4];
    u8 *writePtr = data;

    for (int y = 0; y < EFB_HEIGHT; y++)
        for (int x = 0; x < EFB_WIDTH; x++) {
            u32 depth = EfbInterface::GetDepth(x, y);
            // depth to bgra
            *(writePtr++) = (depth >> 16) & 0xff;
            *(writePtr++) = (depth >> 8) & 0xff;            
            *(writePtr++) = depth & 0xff;
            *(writePtr++) = 255;
        }

    (void)SaveTGA(filename, EFB_WIDTH, EFB_HEIGHT, data);

    delete []data;
}

void DrawObjectBuffer(s16 x, s16 y, u8 *color, int bufferBase, int subBuffer, const char *name)
{
    int buffer = bufferBase + subBuffer;

	u32 offset = (x + y * EFB_WIDTH) * 4;
    u8 *dst = (u8*)&ObjectBuffer[buffer][offset];
    *(dst++) = color[2];
    *(dst++) = color[1];
    *(dst++) = color[0];
    *(dst++) = color[3];

    DrawnToBuffer[buffer] = true;
    ObjectBufferName[buffer] = name;
	BufferBase[buffer] = bufferBase;
}

void DrawTempBuffer(u8 *color, int buffer)
{
	u8 *dst = (u8*)&TempBuffer[buffer];
    *(dst++) = color[2];
    *(dst++) = color[1];
    *(dst++) = color[0];
    *(dst++) = color[3];
}

void CopyTempBuffer(s16 x, s16 y, int bufferBase, int subBuffer, const char *name)
{
	int buffer = bufferBase + subBuffer;

	u32 offset = (x + y * EFB_WIDTH);
	ObjectBuffer[buffer][offset] = TempBuffer[buffer];

	DrawnToBuffer[buffer] = true;
    ObjectBufferName[buffer] = name;
	BufferBase[buffer] = bufferBase;
}

void OnObjectBegin()
{
    if (!g_bSkipCurrentFrame)
    {
        if (g_SWVideoConfig.bDumpTextures && stats.thisFrame.numDrawnObjects >= g_SWVideoConfig.drawStart && stats.thisFrame.numDrawnObjects < g_SWVideoConfig.drawEnd)
            DumpActiveTextures();

        if (g_SWVideoConfig.bHwRasterizer)
		{
            HwRasterizer::BeginTriangles();
			drawingHwTriangles = true;
		}
    }
}

void OnObjectEnd()
{
    if (!g_bSkipCurrentFrame)
    {
        if (g_SWVideoConfig.bDumpObjects && stats.thisFrame.numDrawnObjects >= g_SWVideoConfig.drawStart && stats.thisFrame.numDrawnObjects < g_SWVideoConfig.drawEnd)
            DumpEfb(StringFromFormat("%sobject%i.tga", File::GetUserPath(D_DUMPFRAMES_IDX), stats.thisFrame.numDrawnObjects).c_str());

        if (g_SWVideoConfig.bHwRasterizer || drawingHwTriangles)
		{
            HwRasterizer::EndTriangles();
			drawingHwTriangles = false;
		}

        for (int i = 0; i < NumObjectBuffers; i++)
        {
            if (DrawnToBuffer[i])
            {
                DrawnToBuffer[i] = false;
                (void)SaveTGA(StringFromFormat("%sobject%i_%s(%i).tga", File::GetUserPath(D_DUMPFRAMES_IDX),
                    stats.thisFrame.numDrawnObjects, ObjectBufferName[i], i - BufferBase[i]).c_str(), EFB_WIDTH, EFB_HEIGHT, ObjectBuffer[i]);
                memset(ObjectBuffer[i], 0, sizeof(ObjectBuffer[i]));
            }
        }

        stats.thisFrame.numDrawnObjects++;
    }
}

void OnFrameEnd()
{
    if (!g_bSkipCurrentFrame)
    {
        if (g_SWVideoConfig.bDumpFrames)
        {
            DumpEfb(StringFromFormat("%sframe%i_color.tga", File::GetUserPath(D_DUMPFRAMES_IDX), stats.frameCount).c_str());
            DumpDepth(StringFromFormat("%sframe%i_depth.tga", File::GetUserPath(D_DUMPFRAMES_IDX), stats.frameCount).c_str());
        }
    }
}

}