/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     font_Font.cpp
  
  Copyright (C)2009-2011 Nintendo/HAL Laboratory, Inc.  All rights reserved.
  
  These coded instructions, statements, and computer programs contain proprietary
  information of Nintendo and/or its licensed developers and are protected by
  national and international copyright laws. 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.
  
  The content herein is highly confidential and should be handled accordingly.
  
  $Revision: 31311 $
 *---------------------------------------------------------------------------*/

#include "precompiled.h"

#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <nn/assert.h>
#include <nn/gx.h>
#ifdef NW_PLATFORM_CTR
    #include <nn/gx/CTR/gx_CommandAccess.h>
#endif
#include <nw/font/font_Font.h>


namespace nw {
namespace font {

namespace internal {

void
LoadTexture(
    u16         texWidth,
    u16         texHeight,
    TexFmt      texFormat,
    const void* pImage,
    bool        isSmallLinearFilter,
    bool        isLargeLinearFilter
)
{
    GLenum format = GL_ALPHA_NATIVE_DMP;
    GLenum type = GL_UNSIGNED_BYTE;
    switch (texFormat)
    {
    case FONT_SHEET_FORMAT_A4:          format = GL_ALPHA_NATIVE_DMP;           type = GL_UNSIGNED_4BITS_DMP;       break;
    case FONT_SHEET_FORMAT_A8:          format = GL_ALPHA_NATIVE_DMP;           type = GL_UNSIGNED_BYTE;            break;
    case FONT_SHEET_FORMAT_LA4:         format = GL_LUMINANCE_ALPHA_NATIVE_DMP; type = GL_UNSIGNED_BYTE_4_4_DMP;    break;
    case FONT_SHEET_FORMAT_LA8:         format = GL_LUMINANCE_ALPHA_NATIVE_DMP; type = GL_UNSIGNED_BYTE;            break;

    case FONT_SHEET_FORMAT_RGBA4:       format = GL_RGBA_NATIVE_DMP;            type = GL_UNSIGNED_SHORT_4_4_4_4;   break;
    case FONT_SHEET_FORMAT_RGB5A1:      format = GL_RGBA_NATIVE_DMP;            type = GL_UNSIGNED_SHORT_5_5_5_1;   break;
    case FONT_SHEET_FORMAT_RGBA8:       format = GL_RGBA_NATIVE_DMP;            type = GL_UNSIGNED_BYTE;            break;
    case FONT_SHEET_FORMAT_RGB565:      format = GL_RGB_NATIVE_DMP;             type = GL_UNSIGNED_SHORT_5_6_5;     break;
    case FONT_SHEET_FORMAT_RGB8:        format = GL_RGB_NATIVE_DMP;             type = GL_UNSIGNED_BYTE;            break;
    default:
        NN_ASSERTMSG(false,
            "CharWriter::LoadTexture() : Unknown font sheet format(=%d)",
            texFormat);
    }
    const GLint mipLevel = 0;

    // テクスチャのメモリへの読み込み指定
    int texLoadFlag =
#ifdef NW_PLATFORM_CTR
            // フォントリソースがメモリに存在していることが前提であるため、
            // FCRAMのものを直接参照してもらい、コピーしない。
            NN_GX_MEM_FCRAM | GL_NO_COPY_FCRAM_DMP
#else
            0
#endif
        ;

    glTexImage2D(GL_TEXTURE_2D | texLoadFlag, mipLevel, format, texWidth, texHeight, 0, format, type, pImage);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    GLint filter = isSmallLinearFilter ? GL_LINEAR: GL_NEAREST;
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
    filter = isLargeLinearFilter ? GL_LINEAR: GL_NEAREST;
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, 0.0f);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, -1000);
}

TextureObject::TextureObject()
{
    Reset();
}

void
TextureObject::Set(
    u32         name,
    const Font* pFont,
    const void* pImage,
    TexFmt      format,
    u16         width,
    u16         height
)
{
    m_Name          = name;
    m_pFont         = pFont;

    m_pImage        = pImage == NULL ?
        0:
#ifdef NW_PLATFORM_CTR
        (nngxGetPhysicalAddr(reinterpret_cast<uptr>(pImage)) / 8)
#else
        reinterpret_cast<uptr>(pImage)
#endif
        ;

    m_Format        = static_cast<u8>(format);
    m_Size.width    = width;
    m_Size.height   = height;
}

}   // namespace internal

Glyph::Glyph()
:   isSheetUpdated(false)
{
}

Font::~Font()
{
}

const CharStrmReader
Font::GetCharStrmReader(char /* dummy */) const
{
    CharStrmReader::ReadNextCharFunc func = NULL;

    switch (GetCharacterCode())
    {
    case CHARACTER_CODE_UNICODE:    func = &CharStrmReader::ReadNextCharUTF8;   break;
    case CHARACTER_CODE_SJIS:       func = &CharStrmReader::ReadNextCharSJIS;   break;
    case CHARACTER_CODE_CP1252:     func = &CharStrmReader::ReadNextCharCP1252; break;

    default:
        NN_ASSERT(false);
        break;
    }

    return CharStrmReader(func);
}

const CharStrmReader
Font::GetCharStrmReader(wchar_t /* dummy */) const
{
    CharStrmReader::ReadNextCharFunc func = NULL;

    switch (GetCharacterCode())
    {
    case CHARACTER_CODE_UNICODE:    func = &CharStrmReader::ReadNextCharUTF16;  break;

    default:
        NN_ASSERT(false);
        break;
    }

    return CharStrmReader(func);
}

}   // namespace font
}   // namespace nw