#include "CTextSupportShader.hpp"
#include "GuiSys/CRasterFont.hpp"

namespace urde
{

boo::ObjToken<boo::IVertexFormat> CTextSupportShader::s_TextVtxFmt;
boo::ObjToken<boo::IShaderPipeline> CTextSupportShader::s_TextAlphaPipeline;
boo::ObjToken<boo::IShaderPipeline> CTextSupportShader::s_TextAddPipeline;

boo::ObjToken<boo::IVertexFormat> CTextSupportShader::s_ImageVtxFmt;
boo::ObjToken<boo::IShaderPipeline> CTextSupportShader::s_ImageAlphaPipeline;
boo::ObjToken<boo::IShaderPipeline> CTextSupportShader::s_ImageAddPipeline;

hecl::VertexBufferPool<CTextSupportShader::CharacterInstance> CTextSupportShader::s_CharInsts;
hecl::VertexBufferPool<CTextSupportShader::ImageInstance> CTextSupportShader::s_ImgInsts;
hecl::UniformBufferPool<CTextSupportShader::Uniform> CTextSupportShader::s_Uniforms;

void CTextSupportShader::CharacterInstance::SetMetrics(const CGlyph& glyph,
                                                       const zeus::CVector2i& offset)
{
    float layer = glyph.GetLayer();

    m_pos[0].assign(offset.x, 0.f, offset.y);
    m_uv[0].assign(glyph.GetStartU(), 1.f - glyph.GetStartV(), layer);

    m_pos[1].assign(offset.x + glyph.GetCellWidth(), 0.f, offset.y);
    m_uv[1].assign(glyph.GetEndU(), 1.f - glyph.GetStartV(), layer);

    m_pos[2].assign(offset.x, 0.f, offset.y + glyph.GetCellHeight());
    m_uv[2].assign(glyph.GetStartU(), 1.f - glyph.GetEndV(), layer);

    m_pos[3].assign(offset.x + glyph.GetCellWidth(), 0.f, offset.y + glyph.GetCellHeight());
    m_uv[3].assign(glyph.GetEndU(), 1.f - glyph.GetEndV(), layer);
}

void CTextSupportShader::ImageInstance::SetMetrics(const CFontImageDef& imgDef,
                                                   const zeus::CVector2i& offset)
{
    zeus::CVector2f imgSize;
    if (imgDef.x4_texs.size())
    {
        const CTexture& tex = *imgDef.x4_texs[0].GetObj();
        imgSize.assign(tex.GetWidth() * imgDef.x14_cropFactor.x,
                       tex.GetHeight() * imgDef.x14_cropFactor.y);
    }
    zeus::CVector2f cropPad = imgDef.x14_cropFactor * 0.5f;

    m_pos[0].assign(offset.x, 0.f, offset.y);
    m_uv[0].assign(0.5f - cropPad.x, 0.5f + cropPad.y);

    m_pos[1].assign(offset.x + imgSize.x, 0.f, offset.y);
    m_uv[1].assign(0.5f + cropPad.x, 0.5f + cropPad.y);

    m_pos[2].assign(offset.x, 0.f, offset.y + imgSize.y);
    m_uv[2].assign(0.5f - cropPad.x, 0.5f - cropPad.y);

    m_pos[3].assign(offset.x + imgSize.x, 0.f, offset.y + imgSize.y);
    m_uv[3].assign(0.5f + cropPad.x, 0.5f - cropPad.y);
}

void CTextSupportShader::Shutdown()
{
    s_TextVtxFmt.reset();
    s_TextAlphaPipeline.reset();
    s_TextAddPipeline.reset();
    s_ImageVtxFmt.reset();
    s_ImageAlphaPipeline.reset();
    s_ImageAddPipeline.reset();

    s_CharInsts.doDestroy();
    s_ImgInsts.doDestroy();
    s_Uniforms.doDestroy();
}

URDE_SPECIALIZE_MULTI_BLEND_SHADER(CTextSupportShader)

}