BL_BlenderShader.cpp

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#include "DNA_customdata_types.h"
#include "DNA_material_types.h"
#include "DNA_scene_types.h"

#include "BKE_global.h"
#include "BKE_main.h"

#include "BL_BlenderShader.h"
#include "BL_Material.h"

#include "GPU_extensions.h"
#include "GPU_material.h"

#include "RAS_BucketManager.h"
#include "RAS_MeshObject.h"
#include "RAS_IRasterizer.h"
 
BL_BlenderShader::BL_BlenderShader(KX_Scene *scene, struct Material *ma, int lightlayer)
:
        mScene(scene),
        mMat(ma),
        mLightLayer(lightlayer),
        mGPUMat(NULL)
{
        mBlenderScene = scene->GetBlenderScene();
        mBlendMode = GPU_BLEND_SOLID;

        ReloadMaterial();
}

BL_BlenderShader::~BL_BlenderShader()
{
        if(mGPUMat)
                GPU_material_unbind(mGPUMat);
}

void BL_BlenderShader::ReloadMaterial()
{
        mGPUMat = (mMat) ? GPU_material_from_blender(mBlenderScene, mMat) : NULL;
}

void BL_BlenderShader::SetProg(bool enable, double time)
{
        if(VerifyShader()) {
                if(enable)
                        GPU_material_bind(mGPUMat, mLightLayer, mBlenderScene->lay, time, 1);
                else
                        GPU_material_unbind(mGPUMat);
        }
}

int BL_BlenderShader::GetAttribNum()
{
        GPUVertexAttribs attribs;
        int i, enabled = 0;

        if(!VerifyShader())
                return enabled;

        GPU_material_vertex_attributes(mGPUMat, &attribs);

    for(i = 0; i < attribs.totlayer; i++)
                if(attribs.layer[i].glindex+1 > enabled)
                        enabled= attribs.layer[i].glindex+1;
        
        if(enabled > BL_MAX_ATTRIB)
                enabled = BL_MAX_ATTRIB;

        return enabled;
}

void BL_BlenderShader::SetAttribs(RAS_IRasterizer* ras, const BL_Material *mat)
{
        GPUVertexAttribs attribs;
        GPUMaterial *gpumat;
        int i, attrib_num;

        ras->SetAttribNum(0);

        if(!VerifyShader())
                return;
        
        gpumat = mGPUMat;

        if(ras->GetDrawingMode() == RAS_IRasterizer::KX_TEXTURED) {
                GPU_material_vertex_attributes(gpumat, &attribs);
                attrib_num = GetAttribNum();

                ras->SetTexCoordNum(0);
                ras->SetAttribNum(attrib_num);
                for(i=0; i<attrib_num; i++)
                        ras->SetAttrib(RAS_IRasterizer::RAS_TEXCO_DISABLE, i);

                for(i = 0; i < attribs.totlayer; i++) {
                        if(attribs.layer[i].glindex > attrib_num)
                                continue;

                        if(attribs.layer[i].type == CD_MTFACE) {
                                if(!mat->uvName.IsEmpty() && strcmp(mat->uvName.ReadPtr(), attribs.layer[i].name) == 0)
                                        ras->SetAttrib(RAS_IRasterizer::RAS_TEXCO_UV1, attribs.layer[i].glindex);
                                else if(!mat->uv2Name.IsEmpty() && strcmp(mat->uv2Name.ReadPtr(), attribs.layer[i].name) == 0)
                                        ras->SetAttrib(RAS_IRasterizer::RAS_TEXCO_UV2, attribs.layer[i].glindex);
                                else
                                        ras->SetAttrib(RAS_IRasterizer::RAS_TEXCO_UV1, attribs.layer[i].glindex);
                        }
                        else if(attribs.layer[i].type == CD_TANGENT)
                                ras->SetAttrib(RAS_IRasterizer::RAS_TEXTANGENT, attribs.layer[i].glindex);
                        else if(attribs.layer[i].type == CD_ORCO)
                                ras->SetAttrib(RAS_IRasterizer::RAS_TEXCO_ORCO, attribs.layer[i].glindex);
                        else if(attribs.layer[i].type == CD_NORMAL)
                                ras->SetAttrib(RAS_IRasterizer::RAS_TEXCO_NORM, attribs.layer[i].glindex);
                        else if(attribs.layer[i].type == CD_MCOL)
                                ras->SetAttrib(RAS_IRasterizer::RAS_TEXCO_VCOL, attribs.layer[i].glindex);
                        else
                                ras->SetAttrib(RAS_IRasterizer::RAS_TEXCO_DISABLE, attribs.layer[i].glindex);
                }
        }
}

void BL_BlenderShader::Update(const RAS_MeshSlot & ms, RAS_IRasterizer* rasty )
{
        float obmat[4][4], viewmat[4][4], viewinvmat[4][4], obcol[4];
        GPUMaterial *gpumat;

        gpumat = mGPUMat;

        if(!gpumat || !GPU_material_bound(gpumat))
                return;

        MT_Matrix4x4 model;
        model.setValue(ms.m_OpenGLMatrix);
        const MT_Matrix4x4& view = rasty->GetViewMatrix();
        const MT_Matrix4x4& viewinv = rasty->GetViewInvMatrix();

        // note: getValue gives back column major as needed by OpenGL
        model.getValue((float*)obmat);
        view.getValue((float*)viewmat);
        viewinv.getValue((float*)viewinvmat);

        if(ms.m_bObjectColor)
                ms.m_RGBAcolor.getValue((float*)obcol);
        else
                obcol[0]= obcol[1]= obcol[2]= obcol[3]= 1.0f;

        GPU_material_bind_uniforms(gpumat, obmat, viewmat, viewinvmat, obcol);

        mBlendMode = GPU_material_blend_mode(gpumat, obcol);
}

int BL_BlenderShader::GetBlendMode()
{
        return mBlendMode;
}

bool BL_BlenderShader::Equals(BL_BlenderShader *blshader)
{
        /* to avoid unneeded state switches */
        return (blshader && mMat == blshader->mMat && mLightLayer == blshader->mLightLayer);
}

// eof