static void
IncrementFrame(project_data *File, int16 Amount) {
    if ((File->CurrentFrame <= 0 && Amount < File->StartFrame) || (File->CurrentFrame >= File->EndFrame)) {
        File->CurrentFrame = 0;
    } else {
        File->CurrentFrame += Amount;
    }
}

static bool32
Source_Generate(project_data *File, memory *Memory, char *Path)
{
    Assert(File->NumberOfSources < MAX_SOURCES);
    source *Source = &File->Source[File->NumberOfSources];

    bool32 Found = 0;

    int w, h;
    if (stbi_info(Path, &w, &h, NULL)) {
        Source->Info.Width = w;
        Source->Info.Height = h;
        Source->SourceType = source_type_image;
        Found = true;
    }

    if (!Found && AV_IsFileSupported(Path)) {
        Source->SourceType = source_type_video;
        Found = true;
    }

    if (Found) {
        Source->Info.BytesPerPixel = 4;
        Source->Path = Path;
        File->NumberOfSources++;
        return 1;
    }

    return 0;
}

    /*
static pixel_buffer
LoadImage(memory *Memory, char *filename)
{
    pixel_buffer Buffer = {};
    Buffer.BytesPerPixel = 4;

    int n = 0;
    int h, w;
    void *temp = stbi_load(filename, &w, &h, &n, 4);
    // printf("%s", stbi_failure_reason());
    Buffer.Height = h;
    Buffer.Width = w;
    CalculateFull(&Buffer);
    Buffer.Pitch = Buffer.FullWidth*Buffer.BytesPerPixel;
    // TODO(fox): Implement custom malloc in stbi so we don't have to do this.
    Buffer.OriginalBuffer = MoveImportToBitmap(Memory, &Buffer, temp);
    stbi_image_free(temp);
    Buffer.EffectBuffer = AllocateMemory(Memory, Buffer.FullWidth * Buffer.FullHeight * Buffer.BytesPerPixel, B_Scratch);
    BitmapPackRGB(&Buffer);
    Buffer.ToUpdate = true;
    return Buffer;
}

    */

static property_channel
InitFloatProperty(char *Name, real32 Val, real32 ScrubVal, real32 MinVal = PROPERTY_REAL_MIN, real32 MaxVal = PROPERTY_REAL_MAX) {
    property_channel Property = {};
    Property.Name = Name;
    Property.CurrentValue.f = Val;
    Property.MinVal.f = MinVal;
    Property.MaxVal.f = MaxVal;
    Property.ScrubVal.f = ScrubVal;
    Property.VarType = type_real;
    Property.GraphWindowHeight = 300;
    return Property;
}


static void
CreateKeyframeBlock(property_channel *Property, memory *Memory)
{
    int16 a = Property->NumberOfKeyframeBlocks++;
    Assert(a < MAX_KEYFRAME_BLOCKS);

    Property->KeyframeBlock[a] = (keyframe_block *)AllocateMemory(Memory, sizeof(keyframe_block), F_Keyframes);
}

static void
PostMsg(project_state *State, char *msg)
{
    State->MsgTime = 120;
    State->Msg = msg;
}

/*
static project_layer *
CreateSolidLayer(project_data *File, memory *Memory, uint16 Width, uint16 Height, v4 Col)
{
    project_layer *Layer = CreateLayer(File, Memory);
    Layer->RenderInfo = AllocateMemory(Memory, sizeof(source_image), P_SourceData);
    source_image *Source = (source_image *)Layer->RenderInfo;
    Source->Raster = CreateSolidBitmap(Memory, Width, Height, Col);
    Layer->SourceType = source_type_image;
    return Layer;
}

static project_layer *
CreateDebugLayer(project_data *File, memory *Memory, uint16 Width, uint16 Height, int i)
{
    project_layer *Layer = CreateLayer(File, Memory);
    Layer->RenderInfo = AllocateMemory(Memory, sizeof(source_image), P_SourceData);
    source_image *Source = (source_image *)Layer->RenderInfo;
        Source->Raster = CreateDebugBitmap(Memory, Width, Height);
    Layer->SourceType = source_type_image;
    return Layer;
}
*/

// Note we use total bytes here so we can use this memory for both packed and unpacked bitmaps.
void * Layer_AllocateBitmap(memory *Memory, uint16 Width, uint16 Height, uint16 BytesPerPixel)
{
    uint64 TotalBytes = Bitmap_CalcTotalBytes(Width, Height, BytesPerPixel);
    void *Address = AllocateMemory(Memory, TotalBytes, B_LayerBitmaps);
    return Address;
}

project_layer * Layer_Init(project_data *File, memory *Memory)
{
    int16 a = File->NumberOfLayers++;
    Assert(a < MAX_LAYERS);

    File->Layer[a] = (project_layer *)AllocateMemory(Memory, sizeof(project_layer), F_Layers);

    File->Layer[a]->Name = (char *)AllocateMemory(Memory, 256, F_Strings);
    sprintf(File->Layer[a]->Name, "Layer %i", a);
    File->Layer[a]->x = InitFloatProperty("X Position", 0.0f, 1.0f);
    File->Layer[a]->y = InitFloatProperty("Y Position", 0.0f, 1.0f);
    File->Layer[a]->ax = InitFloatProperty("Anchor X", 0.5f, 0.005f);
    File->Layer[a]->ay = InitFloatProperty("Anchor Y", 0.5f, 0.005f);
    File->Layer[a]->scale = InitFloatProperty("Scale", 1.0f, 0.005f);
    File->Layer[a]->rotation = InitFloatProperty("Rotation", 0.0f, 1.0f);
    File->Layer[a]->opacity = InitFloatProperty("Opacity", 1.0f, 0.005f, 0.0f, 1.0f);
    File->Layer[a]->time = InitFloatProperty("Frame Number", 0.0f, 1.0f, 0, 100000);
    File->Layer[a]->EndFrame = File->NumberOfFrames;

    return File->Layer[a];
}

static cached_bitmap *
Cache_CheckBitmap(source *Source, layer_bitmap_info *BitmapInfo, memory *Memory, int32 TimelineFrame)
{
    memory_table *Table = &Memory->Slot[B_LoadedBitmaps];
    int32 FrameToSeek = TimelineFrame - BitmapInfo->FrameOffset;
    // Stills have a frame index of zero.
    if (FrameToSeek < 0 || Source->SourceType == source_type_image) {
        FrameToSeek = 0;
    };
    for (int i = 0; i < Table->NumberOfPointers; i++) {
        cached_bitmap *Bitmap = &Memory->Bitmap[i];
        if (Bitmap->Frame == FrameToSeek && Bitmap->SourceOwner == Source) {
            return Bitmap;
        }
    }
    return 0;
}

static cached_bitmap *
STB_LoadStill(source *Source, layer_bitmap_info *BitmapInfo, memory *Memory)
{
    int n = 0;
    int h, w;
    void *temp = stbi_load(Source->Path, &w, &h, &n, 4);
    Assert(temp);
    cached_bitmap *Bitmap = Memory_RollingBitmap(Memory, Source, 0);
    // Note the use of Unpacked since we haven't packed the bitmap and don't have any padding.
    uint64 Size = Bitmap_CalcUnpackedBytes(Source->Info.Width, Source->Info.Height, Source->Info.BytesPerPixel);
    Bitmap_CopyToPointer(temp, Bitmap->Data, Source->Info.BytesPerPixel, Size);
    return Bitmap;
}


static void
Layer_UpdateBitmap(project_layer *Layer, memory *Memory, int32 CurrentFrame) {
    source *Source = Layer->Source;
    layer_bitmap_info *BitmapInfo = &Layer->BitmapInfo;
    cached_bitmap *Bitmap = Cache_CheckBitmap(Source, BitmapInfo, Memory, CurrentFrame);
    if (!Bitmap)  {
        if (Source->SourceType == source_type_image) {
            Bitmap = STB_LoadStill(Source, BitmapInfo, Memory);
        } else {
            Bitmap = AV_LoadVideoFrame(Source, BitmapInfo, Memory, CurrentFrame);
        }
    }
    uint16 Width = Source->Info.Width;
    uint16 Height = Source->Info.Height;
    uint16 BytesPerPixel = Source->Info.BytesPerPixel;
    void *DestBuffer = BitmapInfo->BitmapBuffer;
    uint64 Size = Bitmap_CalcUnpackedBytes(Source->Info.Width, Source->Info.Height, Source->Info.BytesPerPixel);
    Bitmap_CopyToPointer(Bitmap->Data, DestBuffer, BytesPerPixel, Size);
    TestGL_InitTexture(&BitmapInfo->Test, DestBuffer, Width, Height);
    for (int i = 0; i < Layer->NumberOfEffects; i++)
    {
        if (Layer->Effect[i]->IsActive)
            Layer->Effect[i]->func(Source, BitmapInfo, Memory, Layer->Effect[i]->Property);
    }
    Bitmap_ConvertPacking(DestBuffer, Memory->Scratch, Width, Height, BytesPerPixel, 0);
    Bitmap_CopyToPointer(Memory->Scratch, DestBuffer, BytesPerPixel, Size);
}

static void
Layer_InitSource(project_layer *Layer, source *Source, memory *Memory)
{
    Layer->Source = Source;
    uint16 Width = Source->Info.Width;
    uint16 Height = Source->Info.Height;
    uint16 BytesPerPixel = Source->Info.BytesPerPixel;
    Layer->BitmapInfo.BitmapBuffer = Layer_AllocateBitmap(Memory, Width, Height, BytesPerPixel);
}

static void
Layer_PositionCenter(project_layer *Layer, uint16 Width, uint16 Height) {
    Layer->x.CurrentValue.f = Width/2;
    Layer->y.CurrentValue.f = Height/2;
}

static void
Layer_CreateFromSource(project_data *File, project_state *State, memory *Memory, source *Source)
{
    project_layer *Layer = Layer_Init(File, Memory);
    AV_Init(Source, &Layer->BitmapInfo, Memory);
    Layer_InitSource(Layer, Source, Memory);
    Layer_PositionCenter(Layer, File->Width, File->Height);
    State->UpdateFrame = true;
}

static ImVec2
Layer_LocalToScreenSpace(project_layer *Layer, ui *UI, comp_buffer CompBuffer, v2 Point)
{
    real32 Rad = (Layer->rotation.CurrentValue.f * (PI / 180));
    real32 s = Layer->scale.CurrentValue.f;
    real32 AX = Layer->ax.CurrentValue.f;
    real32 AY = Layer->ay.CurrentValue.f;
    source *Source = Layer->Source;

    v2 XAxis = (Point.x - AX*Source->Info.Width)  * s  * V2(cos(Rad), sin(Rad));
    v2 YAxis = (Point.y - AY*Source->Info.Height) * -s * V2(sin(Rad), -cos(Rad));
    v2 LocalPoint = XAxis + YAxis;
    v2 CompUV = V2((Layer->x.CurrentValue.f + LocalPoint.x) / CompBuffer.Width,
                   (Layer->y.CurrentValue.f + LocalPoint.y) / CompBuffer.Height);
    v2 ScreenPoint = V2(UI->CompPos.x + CompUV.x * UI->CompZoom.x,
                        UI->CompPos.y + CompUV.y * UI->CompZoom.y);

    return ImVec2(ScreenPoint.x, ScreenPoint.y);
}

static void
Mask_AddPoint(mask *Mask, ImVec2 Pos, ImVec2 TangentLeft, ImVec2 TangentRight,
                          ImVec2 Ratio0, ImVec2 Ratio1, uint16 Index)
{
    mask_point *Point = &Mask->Point[Index];
    mask_point *NextPoint = &Mask->Point[Index+1];

    Point->TangentRight = -V2(Ratio0);
    NextPoint->TangentLeft = -V2(Ratio1);

    for (int i = Mask->NumberOfPoints - 1; i > Index; i--) {
        Mask->Point[i+1] = Mask->Point[i];
    }
    mask_point *PointToAdd = &Mask->Point[Index+1];
    PointToAdd->Pos = {Pos.x, Pos.y};
    PointToAdd->TangentLeft = {-TangentLeft.x, -TangentLeft.y};
    PointToAdd->TangentRight = {-TangentRight.x, -TangentRight.y};
    PointToAdd->TangentLeft = {-TangentLeft.x, -TangentLeft.y};
    PointToAdd->TangentRight = {-TangentRight.x, -TangentRight.y};
    Mask->NumberOfPoints++;
}

static void
LoadTestFootage(project_data *File, project_state *State, memory *Memory)
{
    if (!Source_Generate(File, Memory, "../asset/24.mp4"))
        PostMsg(State, "File open fail...");
    source *Source = &File->Source[0];
    Layer_CreateFromSource(File, State, Memory, Source);
    SelectLayer(File->Layer[0], State, 0);
    AddEffect(File->Layer[0], Memory, 3);
    mask *Mask = &File->Layer[0]->Mask[0];
    File->Layer[0]->NumberOfMasks = 1;
    Mask->Point[0].Pos = V2(200, 200);
    Mask->Point[1].Pos = V2(1280, 0);
    Mask->Point[2].Pos = V2(1280, 720);
    Mask->Point[3].Pos = V2(0, 720);

    Mask->Point[0].TangentLeft = V2(-50, 0);
    Mask->Point[1].TangentLeft = V2(-50, 0);
    Mask->Point[2].TangentLeft = V2(-50, 0);
    Mask->Point[3].TangentLeft = V2(-50, 0);

    Mask->Point[0].TangentRight = V2(50, 0);
    Mask->Point[1].TangentRight = V2(50, 0);
    Mask->Point[2].TangentRight = V2(50, 0);
    Mask->Point[3].TangentRight = V2(50, 0);

    Mask->NumberOfPoints = 4;
    // property_channel *Property = &File->Layer[0]->x;
    // ManualKeyframeInsertF(Property, Memory, 1, 500);
    // ManualKeyframeInsertF(Property, Memory, 30, 800);
    // ManualKeyframeInsertF(Property, Memory, 15, 400);
    // ManualKeyframeInsertF(Property, Memory, 20, 100);
    // Property->IsToggled = true;
    // Property->IsGraphToggled = true;
    // Property->GraphLength = 150;
    // Property->GraphYOffset = (Property->GraphWindowHeight - Property->GraphLength)/2;

    // Layer_CreateFromSource(File, State, Memory, Source);

    if (!Source_Generate(File, Memory, "../asset/p.mp4"))
        PostMsg(State, "File open fail...");
    // source *Source2 = &File->Source[1];
    // project_layer *Layer2 = Layer_Init(File, Memory);
    // AV_Init(Source2, &Layer2->BitmapInfo, Memory);
    // Layer_InitSource(Layer2, Source2, Memory);
    // Layer2->StartFrame = 11;
    // Layer2->EndFrame = 23;

    // if (!Source_Generate(File, Memory, "../asset/b.jpg"))
    //     PostMsg(State, "File open fail...");
    // source *Source2 = &File->Source[2];
    // project_layer *Layer2 = Layer_Init(File, Memory);
    // Layer_InitSource(Layer2, Source2, Memory);

    // AddEffect(File->Layer[0], Memory, 2);
    // project_layer *Layer1 = CreateDebugLayer(&File, &Memory, 9, 14);
    // project_layer *Layer1 = CreateSolidLayer(&File, &Memory, 9, 13, V4(1.0, 1.0, 1.0, 1.0));
    // Layer1->x.CurrentValue.f = 7;
    // Layer1->y.CurrentValue.f = 4;
    // Layer1->StartFrame = 0;
    // Layer1->EndFrame = File.EndFrame;
}

static void
CreateDemoScene(project_data *File, memory *Memory)
{
#if 0
    project_layer *Layer1 = CreateSolidLayer(File, Memory, 720, 1280, V4(0.0, 0.0, 0.0, 1.0));
    Layer1->x.CurrentValue.f = 1280/2;
    Layer1->y.CurrentValue.f = 720/2;
    Layer1->StartFrame = 0;
    Layer1->EndFrame = File->EndFrame;
    project_layer *Layer2 = CreateSolidLayer(File, Memory, 499, 503, V4(0.0, 1.0, 0.4, 1.0));
    Layer2->x.CurrentValue.f = 1280/2;
    Layer2->y.CurrentValue.f = 720/2;
    Layer2->StartFrame = 0;
    Layer2->EndFrame = File->EndFrame;
    ManualKeyframeInsertF(&Layer2->rotation, Memory, 2, 0);
    ManualKeyframeInsertF(&Layer2->rotation, Memory, 50, 360);
    Layer2->rotation.IsToggled = true;
    Layer2->scale.IsToggled = true;
    project_layer *Layer3 = CreateSolidLayer(File, Memory, 157, 163, V4(1.0, 0.3, 0.2, 1.0));
    Layer3->x.CurrentValue.f = 1280/4;
    Layer3->y.CurrentValue.f = 720/4;
    Layer3->opacity.CurrentValue.f = 0.5f;
    Layer3->StartFrame = 0;
    Layer3->EndFrame = File->EndFrame;
    ManualKeyframeInsertF(&Layer3->x, Memory, 2,  Layer3->x.CurrentValue.f);
    ManualKeyframeInsertF(&Layer3->x, Memory, 30, Layer3->x.CurrentValue.f+(1280/2));
    ManualKeyframeInsertF(&Layer3->x, Memory, 60, Layer3->x.CurrentValue.f+(1280/3));
    Layer3->x.IsToggled = true;
    Layer3->y.IsToggled = true;
#endif
}

#if 0
static void
CreateGrid(project_data *File, memory *Memory) {
    uint16 Amount = 8;
    real32 XInc = File->Width / Amount;
    real32 YInc = File->Height / Amount;
    for (int16 j = 0; j < 8; j++) {
        for (int16 i = 0; i < 8; i++) {
            project_layer *Layer = CreateSolidLayer(File, Memory, 400, 400, V4(0.6, 0.3, 0.4, 1.0));
            Layer->x.CurrentValue.f = (XInc*i);
            Layer->y.CurrentValue.f = (XInc*j);
            Layer->opacity.CurrentValue.f = 0.25;
            Layer->StartFrame = 0;
            Layer->EndFrame = File->EndFrame;
            ManualKeyframeInsertF(&Layer->rotation, Memory, i, 0);
            ManualKeyframeInsertF(&Layer->rotation, Memory, 40+i, 360);
        }
    }
}
#endif
#if 0
static void
DrawHistogram(project_layer *Layer, pixel_buffer *UIBuffer, void *Scratch, memory *Memory, sdl_input Input, project_state *State,
              rectangle Box)
{
    uint16 Padding = 20; //UI->LayerPadding / 5;
    uint16 Margin = 100;

    uint16 *Levels = (uint16 *)Scratch;

    uint16 *Mean = (Levels + 256*7);

    uint32 Color = 0;
    uint32 AltColor = ColToUint32(V4(0.1,0.1,0.1,1.0));

    // this is a bad idea
    real32 *Zoom = (real32 *)(Levels + 256*6);
    if (*Zoom < 0.0f)
        *Zoom = 0.0f;
    uint16 *SelectedChannel = (uint16 *)(Levels + 256*6 + 3);

    if (*SelectedChannel == 0) {
        Color = ColToUint32(V4(0.6,0.6,0.6,1.0));
    } else if (*SelectedChannel == 1) {
        Levels += 256;
        Color = ColToUint32(V4(0.6,0.0,0.0,1.0));
    } else if (*SelectedChannel == 2) {
        Levels += 256*2;
        Color = ColToUint32(V4(0.0,0.6,0.0,1.0));
    } else if (*SelectedChannel == 3) {
        Levels += 256*3;
        Color = ColToUint32(V4(0.0,0.0,0.6,1.0));
    } else if (*SelectedChannel == 4) {
        Levels += 256*4;
        Color = ColToUint32(V4(0.9,0.9,0.9,1.0));
    }


    /*
    if (TestRectangle(Box, Input.Mouse) &&
        Input.MouseButton[0].IsDown)
    {
        State->ArbitrarySlide = 1;
        State->Sliding.RandomPointer = Zoom;
    }
    */

    uint8 *Row = ((uint8 *)UIBuffer->OriginalBuffer +
                     UIBuffer->BytesPerPixel +
                     UIBuffer->Pitch);
    for (int Y = 0;
        Y > Box.Min.y;
        Y--)
    {
        uint32 *Pixel = (uint32 *)Row + Box.Min.x;
        for(int X = Box.Min.x;
            X < Box.Max.x;
            ++X)
        {
            real32 Span = (Box.Max.x - Box.Min.x) / 256.0f;
            int16 XLocal = (X - Box.Min.x) / Span;
            int16 YLocal = -(Y - Box.Max.y);
            if (*(Levels + XLocal) > (YLocal * RoundReal32ToInt32(*Zoom)) && XLocal < 256)
                *Pixel++ = Color;
            else
                *Pixel++ = AltColor;
        }
        Row -= UIBuffer->Pitch;
    }
}

static pixel_buffer
CreateSolidBitmap(memory *Memory, uint16 Height, uint16 Width, v4 Color) {
    pixel_buffer Buffer = {};
    Buffer.BytesPerPixel = 4;
    Buffer.Height = Height;
    Buffer.Width = Width;
    CalculateFull(&Buffer);
    Buffer.Pitch = Buffer.FullWidth*Buffer.BytesPerPixel;
    Buffer.OriginalBuffer = AllocateMemory(Memory, Buffer.FullHeight * Buffer.FullWidth * Buffer.BytesPerPixel, B_Scratch);
    Buffer.EffectBuffer = AllocateMemory(Memory,   Buffer.FullHeight * Buffer.FullWidth * Buffer.BytesPerPixel, B_Scratch);
    DebugFillSolid(&Buffer, Color);
    BitmapPackRGB(&Buffer);
    Buffer.ToUpdate = true;
    return Buffer;
}

static pixel_buffer
CreateDebugBitmap(memory *Memory, uint16 Height, uint16 Width) {
    pixel_buffer Buffer = {};
    Buffer.BytesPerPixel = 4;
    Buffer.Height = Height;
    Buffer.Width = Width;
    CalculateFull(&Buffer);
    Buffer.Pitch = Buffer.FullWidth*Buffer.BytesPerPixel;
    Buffer.OriginalBuffer = AllocateMemory(Memory, Buffer.FullHeight * Buffer.FullWidth * Buffer.BytesPerPixel, B_Scratch);
    Buffer.EffectBuffer = AllocateMemory(Memory,   Buffer.FullHeight * Buffer.FullWidth * Buffer.BytesPerPixel, B_Scratch);
    DebugBitmap(&Buffer);
    BitmapPackRGB(&Buffer);
    Buffer.ToUpdate = true;
    return Buffer;
}

/*
{
        Layer->RenderInfo = AllocateMemory(Memory, sizeof(source_image), P_SourceData);
        Layer->RenderInfo = AllocateMemory(Memory, sizeof(source_video), P_SourceData);
        source_image *Source = (source_image *)Layer->RenderInfo;
        Source->Raster = LoadImage(Memory, filename);
        Layer->EndFrame = File.EndFrame;
        Layer->x.CurrentValue.f = 1280/2;
        Layer->y.CurrentValue.f = 720/2;
        Layer->StartFrame = 0;


        Layer->x.CurrentValue.f = 1280/2;
        Layer->y.CurrentValue.f = 720/2;
        Layer->StartFrame = 0;
        Layer->EndFrame = File.EndFrame;
}
*/


#endif