/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     lyt_Common.cpp

  Copyright (C)2009-2010 Nintendo Co., Ltd./HAL Laboratory, Inc.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Revision: 25594 $
 *---------------------------------------------------------------------------*/

#include "precompiled.h"

#include <nw/lyt/lyt_Common.h>
#include <nw/lyt/lyt_DrawInfo.h>
#include <nw/lyt/lyt_GraphicsResource.h>
#include <nw/lyt/lyt_Material.h>
#include <nw/lyt/lyt_Pane.h>
#include <nw/lyt/lyt_Layout.h>
#include <nw/lyt/lyt_Stopwatch.h>
#include <nw/lyt/lyt_Supplement.h>

#define ARRAY_LENGTH(a)   (sizeof(a) / sizeof((a)[0]))

namespace nw
{
namespace lyt
{

// コンパイル時チェック
void
TevStage::CompileCheck()
{
    NW_COMPILER_ASSERT(
        FIELD0_SIZE ==
            BITS_SRCRGB * 3 +
            BITS_OPERANDRGB * 3 +
            BITS_COMBINERGB +
            BITS_SCALE +
            BITS_SAVEPREV);

    NW_COMPILER_ASSERT(
        FIELD1_SIZE ==
            BITS_SRCALPHA * 3 +
            BITS_OPERANDALPHA * 3 +
            BITS_COMBINEALPHA +
            BITS_SCALE +
            BITS_SAVEPREV);

    NW_COMPILER_ASSERT(
        FIELD2_SIZE ==
            BITS_KONSTSEL * 2);
}

namespace
{

#ifdef NW_LYT_DMPGL_ENABLED

static const GLushort s_VertexIndex[] =
{
    VERTEX_RT, VERTEX_LT, VERTEX_RB,
    VERTEX_LT, VERTEX_LB, VERTEX_RB,
};

static const int s_NumVertex = ARRAY_LENGTH(s_VertexIndex);

static const GLshort s_UniformVertexIndex[][VERTEXATTRSIZE_INDEX] =
{
    { 0, 0 }, // LT
    { 1, 0 }, // RT
    { 0, 1 }, // LB
    { 1, 1 }, // RB
};

NW_COMPILER_ASSERT(ARRAY_LENGTH(s_UniformVertexIndex) == VERTEX_MAX);

static const GLfloat s_VertexPosition[][VERTEXATTRSIZE_POS] =
{
    { 0.f,  0.f,  0.f,  1.f }, // LT
    { 1.f,  0.f,  0.f,  1.f }, // RT
    { 0.f, -1.f,  0.f,  1.f }, // LB
    { 1.f, -1.f,  0.f,  1.f }, // RB
};

NW_COMPILER_ASSERT(ARRAY_LENGTH(s_VertexPosition) == VERTEX_MAX);

#endif // NW_LYT_DMPGL_ENABLED

}

namespace internal
{

using namespace nw::math;

bool
EqualsResName(const char* name1, const char* name2)
{
     return 0 == std::strncmp(name1, name2, ResourceNameStrMax);
}

bool
EqualsMaterialName(const char* name1, const char* name2)
{
     return 0 == std::strncmp(name1, name2, MaterialNameStrMax);
}

TexCoordAry::TexCoordAry()
:   m_Cap(0),
    m_Num(0),
    m_pData(NULL)
{
}

void
TexCoordAry::Free()
{
    if (m_pData)
    {
        const u32 coordNum = m_Cap;
        Layout::DeleteArray<math::VEC2>(&m_pData[0][0], VERTEX_MAX * coordNum);
        m_pData = 0;

        m_Cap = 0;
        m_Num = 0;
    }
}

void
TexCoordAry::Reserve(u8 num)
{
    NW_ASSERT(num <= TexMapMax);

    if (m_Cap < num)
    {
        Free();

        // テクスチャ座標
        const u32 coordNum = num;
        math::VEC2 *const pVecAry = Layout::NewArray<math::VEC2>(VERTEX_MAX * coordNum);
        m_pData = reinterpret_cast<TexCoordQuad *>(pVecAry);
        if (m_pData)
        {
            m_Cap = num;
        }
    }
}

void
TexCoordAry::SetSize(u8 num)
{
    if (m_pData && num <= m_Cap)
    {
        static const VEC2 texCoords[] =
        {
            VEC2(0.f, 0.f),
            VEC2(1.f, 0.f),
            VEC2(0.f, 1.f),
            VEC2(1.f, 1.f)
        };
        NW_COMPILER_ASSERT(ARRAY_LENGTH(texCoords) == VERTEX_MAX);

        for (int j = m_Num; j < num; ++j)
        {
            for (int i = 0; i < VERTEX_MAX; ++i)
            {
                m_pData[j][i] = texCoords[i];
            }
        }
        m_Num = num;
    }
}

void
TexCoordAry::GetCoord(
    u32 idx,
    TexCoordQuad coord
) const
{
    NW_ASSERT(idx < m_Num);

    for (int i = 0; i < VERTEX_MAX; ++i)
    {
        coord[i] = m_pData[idx][i];
    }
}

void
TexCoordAry::SetCoord(
    u32 idx,
    const TexCoordQuad coord
)
{
    NW_ASSERT(idx < m_Num);

    for (int i = 0; i < VERTEX_MAX; ++i)
    {
        m_pData[idx][i] = coord[i];
    }
}

void
TexCoordAry::Copy(
    const void* pResTexCoord,
    u8 texCoordNum
)
{
    NW_ASSERT(texCoordNum <= m_Cap);

    m_Num = ut::Max(m_Num, texCoordNum);
    const math::VEC2 (*src)[VERTEX_MAX] = static_cast<const math::VEC2 (*)[VERTEX_MAX]>(pResTexCoord);
    for (int j = 0; j < texCoordNum; ++j)
    {
        for (int i = 0; i < VERTEX_MAX; ++i)
        {
            m_pData[j][i] = src[j][i];
        }
    }
}

const ut::Color8
MultipleAlpha(
    const ut::Color8   col,
    u8                  alpha
)
{
    ut::Color8 ret = col;
    if (alpha != ut::Color8::ALPHA_MAX)
    {
        ret.a = u8(col.a * alpha / ut::Color8::ALPHA_MAX);
    }
    return ret;
}

static f32
ColorU8ToFloat(u8 value)
{
    return 1.0F / 255 * value;
}

#ifdef NW_LYT_DMPGL_ENABLED

void
DrawQuad(
    const DrawInfo&     drawInfo,
    const VEC2&         basePt,
    const Size&         size,
    u8                  texCoordNum,
    const VEC2          (*texCoords)[VERTEX_MAX],
    const ut::Color8*    vtxColors
)
{
    NW_LYT_STOPWATCH_MEASURE(-100, "nw::lyt::internal::DrawQuad");

    GraphicsResource& gres = *drawInfo.GetGraphicsResource();

    // プログラムが設定されてから一度だけ行う初期化。
    gres.SetupProgram();

    // 頂点カラー
    if (vtxColors != NULL)
    {
        GLint loc = gres.GetUniformLocation(gres.UNIFORM_uVertexColor);
        glUniform4f(loc + 0, vtxColors[0].r, vtxColors[0].g, vtxColors[0].b, vtxColors[0].a);
        glUniform4f(loc + 1, vtxColors[1].r, vtxColors[1].g, vtxColors[1].b, vtxColors[1].a);
        glUniform4f(loc + 2, vtxColors[2].r, vtxColors[2].g, vtxColors[2].b, vtxColors[2].a);
        glUniform4f(loc + 3, vtxColors[3].r, vtxColors[3].g, vtxColors[3].b, vtxColors[3].a);
        NW_GL_ASSERT();
    }

    // テクスチャ座標
    if (texCoordNum > 0 && texCoords != NULL)
    {
        for (int i = 0; i < TexMapMax; ++i)
        {
            int src = gres.GetTexCoordSrc(i);
            if (0 <= src && texCoords != NULL && src < texCoordNum)
            {
                GLint loc = gres.GetUniformLocation(gres.UNIFORM_uVertexTexCoord0 + i);
                glUniform4f(loc + 0, texCoords[src][0].x, texCoords[src][0].y, 0.0f, 1.0f);
                glUniform4f(loc + 1, texCoords[src][1].x, texCoords[src][1].y, 0.0f, 1.0f);
                glUniform4f(loc + 2, texCoords[src][2].x, texCoords[src][2].y, 0.0f, 1.0f);
                glUniform4f(loc + 3, texCoords[src][3].x, texCoords[src][3].y, 0.0f, 1.0f);
                NW_GL_ASSERT();
            }
        }
    }

    // ローカル座標変換を設定
    {
        GLint loc = gres.GetUniformLocation(gres.UNIFORM_uTransform);
        glUniform4f(loc, size.width, size.height, basePt.x, basePt.y);
        NW_GL_ASSERT();
    }

    gres.LoadMtxModelView();
    NW_GL_ASSERT();

    glDrawElements(GL_TRIANGLES, s_NumVertex, GL_UNSIGNED_SHORT, 0);
    NW_GL_ASSERT();
}

// @brief 前回と同じ設定で描画を繰り返す
void
DrawQuad_Repeat(
    const DrawInfo&     drawInfo,
    const VEC2&         basePt,
    const Size&         size
)
{
    NW_LYT_STOPWATCH_MEASURE(-101, "nw::lyt::internal::DrawQuad_Repeat");

    GraphicsResource& gres = *drawInfo.GetGraphicsResource();

    // ローカル座標変換を設定
    {
        GLint loc = gres.GetUniformLocation(gres.UNIFORM_uTransform);
        glUniform4f(loc, size.width, size.height, basePt.x, basePt.y);
        NW_GL_ASSERT();
    }

    glDrawElements(GL_TRIANGLES, s_NumVertex, GL_UNSIGNED_SHORT, 0);
    NW_GL_ASSERT();
}

void
DrawLine(
    const DrawInfo&     drawInfo,
    const math::VEC2&   pos,
    const Size&         size,
    ut::Color8          color)
{
    GraphicsResource& graphicsResource = *drawInfo.GetGraphicsResource();

    GLuint program = graphicsResource.GetGlProgramDebug();
    graphicsResource.UseProgram(program);

    // バッファオブジェクトは使わない。
    glBindBuffer(GL_ARRAY_BUFFER, 0);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

    // 頂点座標
    glEnableVertexAttribArray(VERTEXATTR_POS);
    glVertexAttribPointer(VERTEXATTR_POS, VERTEXATTRSIZE_POS, GL_FLOAT, GL_FALSE, 0, s_VertexPosition);

    glDisableVertexAttribArray(VERTEXATTR_COLOR);
    glDisableVertexAttribArray(VERTEXATTR_TEXCOORD0);
    glDisableVertexAttribArray(VERTEXATTR_TEXCOORD1);
    glDisableVertexAttribArray(VERTEXATTR_TEXCOORD2);

    glDisable(GL_BLEND);
    glDisable(GL_COLOR_LOGIC_OP);
    NW_GL_ASSERT();

    glUniform4f(glGetUniformLocation(program, "dmp_TexEnv[0].constRgba"),
        ColorU8ToFloat(color.r),
        ColorU8ToFloat(color.g),
        ColorU8ToFloat(color.b),
        ColorU8ToFloat(color.a));
    NW_GL_ASSERT();

    f32 x = pos.x;
    f32 y = pos.y;
    f32 w = size.width;
    f32 h = size.height;
    f32 u = ((w > 0.f)? 1.f : -1.f) * 2.f;
    f32 v = ((h > 0.f)? 1.f : -1.f) * 2.f;

    // LINEが描けないので、４つの矩形で表現する。

    {
        nw::math::MTX44 m(
            w, 0, 0, x,
            0, v, 0, y,
            0, 0, 1, 0,
            0, 0, 0, 1);
        internal::MTX44Mult(&m, &graphicsResource.GetMtxModelView(), &m);
        glUniformMatrix4fv(glGetUniformLocation(program, "uModelView"), 1, GL_TRUE, m.a);
        NW_GL_ASSERT();

        glDrawElements(GL_TRIANGLES, s_NumVertex, GL_UNSIGNED_SHORT, s_VertexIndex);
        NW_GL_ASSERT();
    }
    
    {
        nw::math::MTX44 m(
            w, 0, 0, x,
            0, v, 0, y - h,
            0, 0, 1, 0,
            0, 0, 0, 1);
        internal::MTX44Mult(&m, &graphicsResource.GetMtxModelView(), &m);
        glUniformMatrix4fv(glGetUniformLocation(program, "uModelView"), 1, GL_TRUE, m.a);
        NW_GL_ASSERT();

        glDrawElements(GL_TRIANGLES, s_NumVertex, GL_UNSIGNED_SHORT, s_VertexIndex);
        NW_GL_ASSERT();
    }

    {
        nw::math::MTX44 m(
            u, 0, 0, x,
            0, h, 0, y,
            0, 0, 1, 0,
            0, 0, 0, 1);
        internal::MTX44Mult(&m, &graphicsResource.GetMtxModelView(), &m);
        glUniformMatrix4fv(glGetUniformLocation(program, "uModelView"), 1, GL_TRUE, m.a);
        NW_GL_ASSERT();

        glDrawElements(GL_TRIANGLES, s_NumVertex, GL_UNSIGNED_SHORT, s_VertexIndex);
        NW_GL_ASSERT();
    }
    
    {
        nw::math::MTX44 m(
            u, 0, 0, x + w,
            0, h, 0, y,
            0, 0, 1, 0,
            0, 0, 0, 1);
        internal::MTX44Mult(&m, &graphicsResource.GetMtxModelView(), &m);
        glUniformMatrix4fv(glGetUniformLocation(program, "uModelView"), 1, GL_TRUE, m.a);
        NW_GL_ASSERT();

        glDrawElements(GL_TRIANGLES, s_NumVertex, GL_UNSIGNED_SHORT, s_VertexIndex);
        NW_GL_ASSERT();
    }
    
    NW_GL_ASSERT();
}

// 外部のシェーダに影響を与えないように後始末。
void
FinalizeGraphics()
{
    glDisableVertexAttribArray(VERTEXATTR_POS);
    glDisableVertexAttribArray(VERTEXATTR_COLOR);
    glDisableVertexAttribArray(VERTEXATTR_TEXCOORD0);
    glDisableVertexAttribArray(VERTEXATTR_TEXCOORD1);
    glDisableVertexAttribArray(VERTEXATTR_TEXCOORD2);

    glBindBuffer(GL_ARRAY_BUFFER, 0);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}

void
GL::SetTextureSamplerType(GraphicsResource& graphicsResource, int index, int value)
{
    //NW_MINMAX_ASSERT(index, 0, internal::TexUnitMax - 1);

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_Texture0_samplerType + index);
    glUniform1i(loc, value);
}

static const int tevMode[] =
{
    GL_REPLACE,
    GL_MODULATE,
    GL_ADD,
    GL_ADD_SIGNED,
    GL_INTERPOLATE,
    GL_SUBTRACT,
    GL_ADD_MULT_DMP,
    GL_MULT_ADD_DMP,
};
NW_COMPILER_ASSERT(ARRAY_LENGTH(tevMode) == TEVMODE_MAX);

void
GL::SetTevCombineRgb(GraphicsResource& graphicsResource, int index, TevMode value)
{
    //NW_MINMAX_ASSERT(index, 0, internal::TexEnvUnitMax - 1);

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_combineRgb + index);
    glUniform1i(loc, tevMode[value]);
}

void
GL::SetTevCombineAlpha(GraphicsResource& graphicsResource, int index, TevMode value)
{
    //NW_MINMAX_ASSERT(index, 0, internal::TexEnvUnitMax - 1);

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_combineAlpha + index);
    glUniform1i(loc, tevMode[value]);
}

static const int tevSrc[] =
{
    GL_TEXTURE0,
    GL_TEXTURE1,
    GL_TEXTURE2,
    GL_TEXTURE3,
    GL_CONSTANT,
    GL_PRIMARY_COLOR,
    GL_PREVIOUS,
#ifdef NW_TARGET_CTR_GL_FINAL
    GL_PREVIOUS_BUFFER_DMP,
#else
    GL_CONSTANT,
#endif
};
NW_COMPILER_ASSERT(ARRAY_LENGTH(tevSrc) == TEVSRC_MAX);

void
GL::SetTevSrcRgb(GraphicsResource& graphicsResource, int index, TevSrc value0, TevSrc value1, TevSrc value2)
{
    //NW_MINMAX_ASSERT(index, 0, internal::TexEnvUnitMax - 1);

    GLint ivec[3] = { tevSrc[value0], tevSrc[value1], tevSrc[value2] };
    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_srcRgb + index);
    glUniform3iv(loc, 1, ivec);
}

void
GL::SetTevSrcAlpha(GraphicsResource& graphicsResource, int index, TevSrc value0, TevSrc value1, TevSrc value2)
{
    //NW_MINMAX_ASSERT(index, 0, internal::TexEnvUnitMax - 1);

    GLint ivec[3] = { tevSrc[value0], tevSrc[value1], tevSrc[value2] };
    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_srcAlpha + index);
    glUniform3iv(loc, 1, ivec);
}

void
GL::SetTevOperandRgb(GraphicsResource& graphicsResource, int index, TevOpRgb value0, TevOpRgb value1, TevOpRgb value2)
{
    static const int tevOpRgb[] =
    {
        GL_SRC_COLOR,
        GL_ONE_MINUS_SRC_COLOR,
        GL_SRC_ALPHA,
        GL_ONE_MINUS_SRC_ALPHA,
#ifdef NW_TARGET_CTR_GL_FINAL
        GL_SRC_R_DMP,
        GL_ONE_MINUS_SRC_R_DMP,
        GL_SRC_G_DMP,
        GL_ONE_MINUS_SRC_G_DMP,
        GL_SRC_B_DMP,
        GL_ONE_MINUS_SRC_B_DMP,
#else
        GL_SRC_COLOR, // RRR
        GL_ONE_MINUS_SRC_COLOR, // INV_RRR
        GL_SRC_COLOR, // GGG
        GL_ONE_MINUS_SRC_COLOR, // INV_GGG
        GL_SRC_COLOR, // BBB
        GL_ONE_MINUS_SRC_COLOR, // INV_BBB
#endif
    };
    NW_COMPILER_ASSERT(ARRAY_LENGTH(tevOpRgb) == TEVOPRGB_MAX);
    //NW_MINMAX_ASSERT(index, 0, internal::TexEnvUnitMax - 1);

    GLint ivec[3] = { tevOpRgb[value0], tevOpRgb[value1], tevOpRgb[value2] };
    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_operandRgb + index);
    glUniform3iv(loc, 1, ivec);
}

void
GL::SetTevOperandAlpha(GraphicsResource& graphicsResource, int index, TevOpAlp value0, TevOpAlp value1, TevOpAlp value2)
{
    static const int tevOpAlp[] =
    {
        GL_SRC_ALPHA,
        GL_ONE_MINUS_SRC_ALPHA,
#ifdef NW_TARGET_CTR_GL_FINAL
        GL_SRC_R_DMP,
        GL_ONE_MINUS_SRC_R_DMP,
        GL_SRC_G_DMP,
        GL_ONE_MINUS_SRC_G_DMP,
        GL_SRC_B_DMP,
        GL_ONE_MINUS_SRC_B_DMP,
#else
        GL_SRC_ALPHA, // R
        GL_ONE_MINUS_SRC_ALPHA, // INV_R
        GL_SRC_ALPHA, // G
        GL_ONE_MINUS_SRC_ALPHA, // INV_G
        GL_SRC_ALPHA, // B
        GL_ONE_MINUS_SRC_ALPHA, // INV_B
#endif
    };
    NW_COMPILER_ASSERT(ARRAY_LENGTH(tevOpAlp) == TEVOPALP_MAX);
    //NW_MINMAX_ASSERT(index, 0, internal::TexEnvUnitMax - 1);

    GLint ivec[3] = { tevOpAlp[value0], tevOpAlp[value1], tevOpAlp[value2] };
    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_operandAlpha + index);
    glUniform3iv(loc, 1, ivec);
}

static const float scale[] =
{
    1.0F,
    2.0F,
    4.0F,
};
NW_COMPILER_ASSERT(ARRAY_LENGTH(scale) == TEVSCALE_MAX);

void
GL::SetTevScaleRgb(GraphicsResource& graphicsResource, int index, TevScale value)
{
    //NW_MINMAX_ASSERT(index, 0, internal::TexEnvUnitMax - 1);

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_scaleRgb + index);
    glUniform1f(loc, scale[value]);
}

void
GL::SetTevScaleAlpha(GraphicsResource& graphicsResource, int index, TevScale value)
{
    //NW_MINMAX_ASSERT(index, 0, internal::TexEnvUnitMax - 1);

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_scaleAlpha + index);
    glUniform1f(loc, scale[value]);
}

void
GL::SetTevConstRgba(GraphicsResource& graphicsResource, int index, nw::ut::Color8 value)
{
    GLfloat fvec[4] =
    {
        ColorU8ToFloat(value.r),
        ColorU8ToFloat(value.g),
        ColorU8ToFloat(value.b),
        ColorU8ToFloat(value.a),
    };

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_constRgba + index);
    glUniform4fv(loc, 1, fvec);
}

void
GL::SetTevConstRgba(GraphicsResource& graphicsResource, int index, nw::ut::Color8 value0, nw::ut::Color8 value1)
{
    GLfloat fvec[4] =
    {
        ColorU8ToFloat(value0.r),
        ColorU8ToFloat(value0.g),
        ColorU8ToFloat(value0.b),
        ColorU8ToFloat(value1.a),
    };

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_constRgba + index);
    glUniform4fv(loc, 1, fvec);
}

void
GL::SetTevBufferColor(nw::lyt::GraphicsResource &graphicsResource, ut::Color8 value)
{
#ifdef NW_TARGET_CTR_GL_FINAL
    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv0_bufferColor);
    glUniform4f(
        loc,
        ColorU8ToFloat(value.r),
        ColorU8ToFloat(value.g),
        ColorU8ToFloat(value.b),
        ColorU8ToFloat(value.a));
#else
    NW_UNUSED_VARIABLE(graphicsResource)
    NW_UNUSED_VARIABLE(value)
#endif
}

void
GL::SetTevBufferInput(nw::lyt::GraphicsResource &graphicsResource, int index, bool valueRgb, bool valueAlpha)
{
#ifdef NW_TARGET_CTR_GL_FINAL
    //NW_MINMAX_ASSERT(index, 1, 4);

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_TexEnv1_bufferInput + index - 1);
    glUniform2i(
        loc,
        valueRgb? GL_PREVIOUS : GL_PREVIOUS_BUFFER_DMP,
        valueAlpha? GL_PREVIOUS : GL_PREVIOUS_BUFFER_DMP);

#else
    NW_UNUSED_VARIABLE(graphicsResource)
    NW_UNUSED_VARIABLE(index)
    NW_UNUSED_VARIABLE(valueRgb)
    NW_UNUSED_VARIABLE(valueAlpha)
#endif
}

void
GL::SetEnableAlphaTest(nw::lyt::GraphicsResource &graphicsResource, bool value)
{
    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_FragOperation_enableAlphaTest);
    glUniform1i(loc, value? GL_TRUE : GL_FALSE);
}

void
GL::SetAlphaRefValue(nw::lyt::GraphicsResource &graphicsResource, f32 value)
{
    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_FragOperation_alphaRefValue);
    glUniform1f(loc, value);
}

void
GL::SetAlphaTestFunc(nw::lyt::GraphicsResource &graphicsResource, nw::lyt::AlphaTest value)
{
    static const GLint alphaTest[] =
    {
        GL_NEVER,
        GL_LESS,
        GL_LEQUAL,
        GL_EQUAL,
        GL_NOTEQUAL,
        GL_GEQUAL,
        GL_GREATER,
        GL_ALWAYS,
    };
    NW_COMPILER_ASSERT(ARRAY_LENGTH(alphaTest) == ALPHATEST_MAX);

    GLint loc = graphicsResource.GetUniformLocation(graphicsResource.UNIFORM_dmp_FragOperation_alphaTestFunc);
    glUniform1i(loc, alphaTest[value]);
}

static const GLint filterMode[] =
{
    GL_NEAREST,
    GL_LINEAR,
};
NW_COMPILER_ASSERT(ARRAY_LENGTH(filterMode)  == TEXFILTER_MAX);

void
GL::SetTexMinFilter(nw::lyt::GraphicsResource&, nw::lyt::TexFilter value)
{
    //NW_MINMAX_ASSERT(value, 0, TEXFILTER_MAX - 1);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filterMode[value]);
}

void
GL::SetTexMagFilter(nw::lyt::GraphicsResource&, nw::lyt::TexFilter value)
{
    //NW_MINMAX_ASSERT(value, 0, TEXFILTER_MAX - 1);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filterMode[value]);
}

#endif // NW_LYT_DMPGL_ENABLED

} // namespace nw::lyt::internal

#ifdef NW_LYT_DMPGL_ENABLED
void
GraphicsResource::InitVBO()
{
    glGenBuffers(this->VBO_MAX, m_GlVertexBufferObject);
    NW_GL_ASSERT();

    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, this->GetVBO(this->VBO_ELEMENT));
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(s_VertexIndex), s_VertexIndex, GL_STATIC_DRAW);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
    NW_GL_ASSERT();

    glBindBuffer(GL_ARRAY_BUFFER, this->GetVBO(this->VBO_VERTEX_INDEX));
    glBufferData(GL_ARRAY_BUFFER, sizeof(s_UniformVertexIndex), s_UniformVertexIndex, GL_STATIC_DRAW);
    glBindBuffer(GL_ARRAY_BUFFER, 0);
    NW_GL_ASSERT();
}
#endif

} // namespace nw::lyt
} // namespace nw