void PassForward_Generic::draw()
{
if(m_commands.empty()) { return; }
++m_frame;
static const VBO_RID s_vboids[] = {VBO_GENERIC_PARAMS1, VBO_GENERIC_PARAMS2};
i3d::DeviceContext *dc = atmGetGLDeviceContext();
RenderTarget *rt = atmGetBackRenderTarget();
Buffer *vbo_params = atmGetVertexBuffer(s_vboids[m_frame%2]);
rt->setDepthStencilBuffer(atmGetRenderTarget(RT_GBUFFER)->getDepthStencilBuffer());
dc->setBlendState(atmGetBlendState(BS_BLEND_ALPHA));
dc->setDepthStencilState(atmGetDepthStencilState(DS_DEPTH_ENABLED));
dc->setRenderTarget(rt);
for(auto si=m_commands.begin(); si!=m_commands.end(); ++si) {
const ModelParamCont &mm = si->second;
for(auto mi=mm.begin(); mi!=mm.end(); ++mi) {
m_params.insert(m_params.end(), mi->second.begin(), mi->second.end());
}
}
if(!m_params.empty()) {
size_t capacity = vbo_params->getDesc().size;
size_t size_byte = sizeof(InstanceParams)*m_params.size();
istAssert(size_byte < capacity);
MapAndWrite(dc, vbo_params, &m_params[0], std::min<size_t>(size_byte, capacity));
m_params.clear();
static const VertexDesc transform_descs[] = {
{GLSL_INSTANCE_TRANSFORM1, I3D_FLOAT32,4, 0, false, 1},
{GLSL_INSTANCE_TRANSFORM2, I3D_FLOAT32,4, 16, false, 1},
{GLSL_INSTANCE_TRANSFORM3, I3D_FLOAT32,4, 32, false, 1},
{GLSL_INSTANCE_TRANSFORM4, I3D_FLOAT32,4, 48, false, 1},
{GLSL_INSTANCE_PARAM1, I3D_FLOAT32,4, 64, false, 1},
{GLSL_INSTANCE_PARAM2, I3D_FLOAT32,4, 80, false, 1},
{GLSL_INSTANCE_PARAM3, I3D_FLOAT32,4, 96, false, 1},
{GLSL_INSTANCE_PARAM4, I3D_FLOAT32,4,112, false, 1},
};
size_t params_offset = 0;
for(auto si=m_commands.begin(); si!=m_commands.end(); ++si) {
const ModelParamCont &mm = si->second;
AtomicShader *sh = atmGetShader(si->first);
sh->bind();
for(auto mi=mm.begin(); mi!=mm.end(); ++mi) {
if(mi->second.empty()) { continue; }
const ModelInfo &model = *atmGetModelInfo(mi->first);
const ParamCont ¶ms = mi->second;
VertexArray *va = atmGetVertexArray(model.vertices);
Buffer *ibo = atmGetIndexBuffer(model.indices);
dc->setIndexBuffer(ibo, 0, I3D_UINT32);
va->setAttributes(1, vbo_params, sizeof(InstanceParams)*params_offset, sizeof(InstanceParams), transform_descs, _countof(transform_descs));
dc->setVertexArray(va);
if(ibo) {
dc->drawIndexedInstanced(model.topology, 0, model.num_indices, params.size());
}
else {
dc->drawInstanced(model.topology, 0, model.num_indices, params.size());
}
dc->setIndexBuffer(nullptr, 0, I3D_UINT32);
dc->setVertexArray(nullptr);
params_offset += params.size();
}
sh->unbind();
}
}
dc->setDepthStencilState(atmGetDepthStencilState(DS_NO_DEPTH_NO_STENCIL));
dc->setBlendState(atmGetBlendState(BS_NO_BLEND));
rt->setDepthStencilBuffer(nullptr);
}
