/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     font_TextWriterResource.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: 21076 $
 *---------------------------------------------------------------------------*/

#include "precompiled.h"

#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <nn.h>
#include <nw/font/font_TextWriterResource.h>
#include <nw/font/font_DispStringBuffer.h>
#include <nw/font/font_RectDrawer.h>

#include <nw/assert.h>  // NW_GL_ASSERT用

#define NW_FONT_TEXENV3   "dmp_TexEnv[3]"
#define NW_FONT_TEXENV4   "dmp_TexEnv[4]"
#define NW_FONT_TEXENV5   "dmp_TexEnv[5]"

namespace nw {
namespace font {

namespace
{

int
GetUniformLocation(
    GLuint      programId,
    const char* name
)
{
    int result = glGetUniformLocation(programId, name);
    NN_ASSERT(result != -1);
    return result;
}

}   // namespace

TextWriterResource::TextWriterResource()
:   m_PosZ(0.f),
    m_IsInitialized(false)
{
    ResetLoadingTexture();          // m_LoadingTexture
}

TextWriterResource::~TextWriterResource()
{
    Finalize();
}

void
TextWriterResource::InitResource(
    const void* shaderBinary,
    u32         size
)
{
    NN_ASSERT(! m_IsInitialized);

    m_ProgramId = glCreateProgram();
    NN_ASSERT(m_ProgramId != 0);

    GLuint shaderHandle = glCreateShader(GL_VERTEX_SHADER);
    NN_ASSERT(shaderHandle != 0);
    glShaderBinary(1, &shaderHandle, GL_PLATFORM_BINARY_DMP, shaderBinary, size);

    glAttachShader(m_ProgramId, shaderHandle);

    glDeleteShader(shaderHandle);
    glAttachShader(m_ProgramId, GL_DMP_FRAGMENT_SHADER_DMP);

    glBindAttribLocation(m_ProgramId, internal::VERTEX_ATTR_POS,      "aPosition");
    glBindAttribLocation(m_ProgramId, internal::VERTEX_ATTR_POS_Z,    "aPositionZ");
    glBindAttribLocation(m_ProgramId, internal::VERTEX_ATTR_COLOR,    "aColor");
    glBindAttribLocation(m_ProgramId, internal::VERTEX_ATTR_TEXCOORD, "aTexCoord");

    glLinkProgram(m_ProgramId);

    glGenTextures(1, &m_TextureId);

    NW_GL_ASSERT();

    m_UniformLocations[internal::LOC_PROJECTION] =
        GetUniformLocation(m_ProgramId, "uProjection");
    m_UniformLocations[internal::LOC_MODELVIEW] =
        GetUniformLocation(m_ProgramId, "uModelView");
    m_UniformLocations[internal::LOC_FRAGMENTLIGHTING_ENABLED] =
        GetUniformLocation(m_ProgramId, "dmp_FragmentLighting.enabled"),
    m_UniformLocations[internal::LOC_TEXTURE0_SAMPLERTYPE] =
        GetUniformLocation(m_ProgramId, "dmp_Texture[0].samplerType"),
    m_UniformLocations[internal::LOC_FOG_MODE] =
        GetUniformLocation(m_ProgramId, "dmp_Fog.mode");
    m_UniformLocations[internal::LOC_FRAGOPERATION_ENABLEALPHATEST] =
        GetUniformLocation(m_ProgramId, "dmp_FragOperation.enableAlphaTest");

    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_SRCRGB      ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".srcRgb"      );
    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_SRCALPHA    ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".srcAlpha"    );
    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_OPERANDRGB  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".operandRgb"  );
    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_OPERANDALPHA] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".operandAlpha");
    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_COMBINERGB  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".combineRgb"  );
    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_COMBINEALPHA] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".combineAlpha");
    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_SCALERGB    ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".scaleRgb"    );
    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_SCALEALPHA  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".scaleAlpha"  );
    m_TexEnvUniformLocations[internal::TEXENV_3][internal::TCLOC_CONSTRGBA   ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV3 ".constRgba"   );

    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_SRCRGB      ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".srcRgb"      );
    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_SRCALPHA    ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".srcAlpha"    );
    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_OPERANDRGB  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".operandRgb"  );
    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_OPERANDALPHA] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".operandAlpha");
    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_COMBINERGB  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".combineRgb"  );
    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_COMBINEALPHA] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".combineAlpha");
    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_SCALERGB    ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".scaleRgb"    );
    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_SCALEALPHA  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".scaleAlpha"  );
    m_TexEnvUniformLocations[internal::TEXENV_4][internal::TCLOC_CONSTRGBA   ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV4 ".constRgba"   );

    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_SRCRGB      ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".srcRgb"      );
    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_SRCALPHA    ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".srcAlpha"    );
    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_OPERANDRGB  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".operandRgb"  );
    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_OPERANDALPHA] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".operandAlpha");
    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_COMBINERGB  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".combineRgb"  );
    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_COMBINEALPHA] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".combineAlpha");
    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_SCALERGB    ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".scaleRgb"    );
    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_SCALEALPHA  ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".scaleAlpha"  );
    m_TexEnvUniformLocations[internal::TEXENV_5][internal::TCLOC_CONSTRGBA   ] =
        GetUniformLocation(m_ProgramId, NW_FONT_TEXENV5 ".constRgba"   );

    m_IsInitialized = true;
}

void
TextWriterResource::FinalizeGX()
{
    for (int i = 0; i < internal::VERTEX_ATTR_NUM; ++i)
    {
        glDisableVertexAttribArray(i);
    }
}

void
TextWriterResource::Finalize()
{
    if (m_IsInitialized)
    {
        FinalizeGX();
        glDeleteTextures(1, &m_TextureId);
        m_IsInitialized = false;

        glUseProgram(0);
        glDeleteProgram(m_ProgramId);

        NN_LOG("nw::font::TextWriterResource: delete buffer\n");
    }
}

void
TextWriterResource::SetProjectionMtx(const nn::math::MTX44& mtx) const
{
    NN_ASSERT(m_IsInitialized);

    glUniform4fv(m_UniformLocations[internal::LOC_PROJECTION], 4, mtx.a);
}

void
TextWriterResource::SetViewMtx(const nn::math::MTX34& mtx) const
{
    NN_ASSERT(m_IsInitialized);

    glUniform4fv(m_UniformLocations[internal::LOC_MODELVIEW], 3, mtx.a);
}

void
TextWriterResource::SetPosZ(f32 posZ)
{
    m_PosZ = posZ;
    glVertexAttrib1f(internal::VERTEX_ATTR_POS_Z, m_PosZ);
}

}   // namespace font
}   // namespace nw