//
// Copyright (c) 2008-2020 the Urho3D project.
//
// 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.
//

#pragma once

#include "../../Graphics/ShaderProgram.h"
#include "../../Graphics/VertexDeclaration.h"
#include "../../Math/Color.h"

#include <d3d9.h>

namespace Urho3D
{

#define URHO3D_SAFE_RELEASE(p) if (p) { ((IUnknown*)p)->Release();  p = 0; }

#define URHO3D_LOGD3DERROR(msg, hr) URHO3D_LOGERRORF("%s (HRESULT %x)", msg, (unsigned)hr)

using ShaderProgramMap = HashMap<Pair<ShaderVariation*, ShaderVariation*>, SharedPtr<ShaderProgram> >;
using VertexDeclarationMap = HashMap<unsigned long long, SharedPtr<VertexDeclaration> >;

/// %Graphics implementation. Holds API-specific objects.
class URHO3D_API GraphicsImpl
{
    friend class Graphics;

public:
    /// Construct.
    GraphicsImpl();

    /// Return Direct3D device.
    IDirect3DDevice9* GetDevice() const { return device_; }

    /// Return device capabilities.
    const D3DCAPS9& GetDeviceCaps() const { return deviceCaps_; }

    /// Return adapter identifier.
    const D3DADAPTER_IDENTIFIER9& GetAdapterIdentifier() const { return adapterIdentifier_; }

    /// Return whether a texture format and usage is supported.
    bool CheckFormatSupport(D3DFORMAT format, DWORD usage, D3DRESOURCETYPE type);

    /// Return whether a multisample level is supported.
    bool CheckMultiSampleSupport(D3DFORMAT format, int level);

private:
    /// Direct3D interface.
    IDirect3D9* interface_;
    /// Direct3D device.
    IDirect3DDevice9* device_;
    /// Default color surface.
    IDirect3DSurface9* defaultColorSurface_;
    /// Default depth-stencil surface.
    IDirect3DSurface9* defaultDepthStencilSurface_;
    /// Frame query for flushing the GPU command queue.
    IDirect3DQuery9* frameQuery_;
    /// Adapter number.
    DWORD adapter_;
    /// Device type.
    D3DDEVTYPE deviceType_;
    /// Device capabilities.
    D3DCAPS9 deviceCaps_;
    /// Adapter identifier.
    D3DADAPTER_IDENTIFIER9 adapterIdentifier_;
    /// Direct3D presentation parameters.
    D3DPRESENT_PARAMETERS presentParams_;
    /// Texture min filter modes in use.
    D3DTEXTUREFILTERTYPE minFilters_[MAX_TEXTURE_UNITS];
    /// Texture mag filter modes in use.
    D3DTEXTUREFILTERTYPE magFilters_[MAX_TEXTURE_UNITS];
    /// Texture mip filter modes in use.
    D3DTEXTUREFILTERTYPE mipFilters_[MAX_TEXTURE_UNITS];
    /// Texture U coordinate addressing modes in use.
    D3DTEXTUREADDRESS uAddressModes_[MAX_TEXTURE_UNITS];
    /// Texture V coordinate addressing modes in use.
    D3DTEXTUREADDRESS vAddressModes_[MAX_TEXTURE_UNITS];
    /// Texture W coordinate addressing modes in use.
    D3DTEXTUREADDRESS wAddressModes_[MAX_TEXTURE_UNITS];
    /// Texture anisotropy setting in use.
    unsigned maxAnisotropy_[MAX_TEXTURE_UNITS];
    /// Texture border colors in use.
    Color borderColors_[MAX_TEXTURE_UNITS];
    /// Device lost flag.
    bool deviceLost_;
    /// Frame query issued flag.
    bool queryIssued_;
    /// sRGB mode in use.
    bool sRGBModes_[MAX_TEXTURE_UNITS];
    /// sRGB write flag.
    bool sRGBWrite_;
    /// Color surfaces in use.
    IDirect3DSurface9* colorSurfaces_[MAX_RENDERTARGETS];
    /// Depth-stencil surface in use.
    IDirect3DSurface9* depthStencilSurface_;
    /// Blending enabled flag.
    DWORD blendEnable_;
    /// Source blend mode.
    D3DBLEND srcBlend_;
    /// Destination blend mode.
    D3DBLEND destBlend_;
    /// Blend operation.
    D3DBLENDOP blendOp_;
    /// Vertex declarations.
    VertexDeclarationMap vertexDeclarations_;
    /// Stream frequencies by vertex buffer.
    unsigned streamFrequencies_[MAX_VERTEX_STREAMS];
    /// Stream offsets by vertex buffer.
    unsigned streamOffsets_[MAX_VERTEX_STREAMS];
    /// Vertex declaration in use.
    VertexDeclaration* vertexDeclaration_;
    /// Shader programs.
    ShaderProgramMap shaderPrograms_;
    /// Shader program in use.
    ShaderProgram* shaderProgram_;

};

}
