/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     font_Font.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: 21906 $
 *---------------------------------------------------------------------------*/

#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