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#include "drape_frontend/gps_track_shape.hpp"
#include "drape/attribute_provider.hpp"
#include "drape/batcher.hpp"
#include "drape/glsl_func.hpp"
#include "drape/glsl_types.hpp"
#include "drape/shader_def.hpp"
#include "drape/texture_manager.hpp"
#include "base/logging.hpp"
namespace df
{
namespace
{
uint32_t const kDynamicStreamID = 0x7F;
struct GpsTrackStaticVertex
{
using TNormal = glsl::vec3;
GpsTrackStaticVertex() = default;
GpsTrackStaticVertex(TNormal const & normal) : m_normal(normal) {}
TNormal m_normal;
};
dp::GLState GetGpsTrackState(ref_ptr<dp::TextureManager> texMng)
{
dp::GLState state(gpu::TRACK_POINT_PROGRAM, dp::GLState::OverlayLayer);
state.SetColorTexture(texMng->GetSymbolsTexture());
return state;
}
dp::BindingInfo const & GetGpsTrackStaticBindingInfo()
{
static unique_ptr<dp::BindingInfo> s_info;
if (s_info == nullptr)
{
dp::BindingFiller<GpsTrackStaticVertex> filler(1);
filler.FillDecl<GpsTrackStaticVertex::TNormal>("a_normal");
s_info.reset(new dp::BindingInfo(filler.m_info));
}
return *s_info;
}
dp::BindingInfo const & GetGpsTrackDynamicBindingInfo()
{
static unique_ptr<dp::BindingInfo> s_info;
if (s_info == nullptr)
{
dp::BindingFiller<GpsTrackDynamicVertex> filler(2, kDynamicStreamID);
filler.FillDecl<GpsTrackDynamicVertex::TPosition>("a_position");
filler.FillDecl<GpsTrackDynamicVertex::TColor>("a_color");
s_info.reset(new dp::BindingInfo(filler.m_info));
}
return *s_info;
}
} // namespace
GpsTrackHandle::GpsTrackHandle(size_t pointsCount)
: OverlayHandle(FeatureID(), dp::Anchor::Center, 0, false)
, m_needUpdate(false)
{
m_buffer.resize(pointsCount * dp::Batcher::VertexPerQuad);
}
void GpsTrackHandle::GetAttributeMutation(ref_ptr<dp::AttributeBufferMutator> mutator) const
{
if (!m_needUpdate)
return;
TOffsetNode const & node = GetOffsetNode(kDynamicStreamID);
ASSERT(node.first.GetElementSize() == sizeof(GpsTrackDynamicVertex), ());
ASSERT(node.second.m_count == m_buffer.size(), ());
uint32_t const byteCount = m_buffer.size() * sizeof(GpsTrackDynamicVertex);
void * buffer = mutator->AllocateMutationBuffer(byteCount);
memcpy(buffer, m_buffer.data(), byteCount);
dp::MutateNode mutateNode;
mutateNode.m_region = node.second;
mutateNode.m_data = make_ref(buffer);
mutator->AddMutation(node.first, mutateNode);
m_needUpdate = false;
}
bool GpsTrackHandle::Update(ScreenBase const & screen)
{
UNUSED_VALUE(screen);
return true;
}
bool GpsTrackHandle::IndexesRequired() const
{
return false;
}
m2::RectD GpsTrackHandle::GetPixelRect(ScreenBase const & screen, bool perspective) const
{
UNUSED_VALUE(screen);
UNUSED_VALUE(perspective);
return m2::RectD();
}
void GpsTrackHandle::GetPixelShape(ScreenBase const & screen, bool perspective, Rects & rects) const
{
UNUSED_VALUE(screen);
UNUSED_VALUE(perspective);
}
void GpsTrackHandle::SetPoint(size_t index, m2::PointD const & position,
float radius, dp::Color const & color)
{
size_t bufferIndex = index * dp::Batcher::VertexPerQuad;
ASSERT_GREATER_OR_EQUAL(bufferIndex, 0, ());
ASSERT_LESS(bufferIndex, m_buffer.size(), ());
for (size_t i = 0; i < dp::Batcher::VertexPerQuad; i++)
{
m_buffer[bufferIndex + i].m_position = glsl::vec3(position.x, position.y, radius);
m_buffer[bufferIndex + i].m_color = glsl::ToVec4(color);
}
m_needUpdate = true;
}
void GpsTrackHandle::Clear()
{
memset(m_buffer.data(), 0, m_buffer.size() * sizeof(GpsTrackDynamicVertex));
m_needUpdate = true;
}
size_t GpsTrackHandle::GetPointsCount() const
{
return m_buffer.size() / dp::Batcher::VertexPerQuad;
}
void GpsTrackShape::Draw(ref_ptr<dp::TextureManager> texMng, GpsTrackRenderData & data)
{
ASSERT_NOT_EQUAL(data.m_pointsCount, 0, ());
size_t const kVerticesInPoint = dp::Batcher::VertexPerQuad;
size_t const kIndicesInPoint = dp::Batcher::IndexPerQuad;
vector<GpsTrackStaticVertex> staticVertexData;
staticVertexData.reserve(data.m_pointsCount * kVerticesInPoint);
for (size_t i = 0; i < data.m_pointsCount; i++)
{
staticVertexData.push_back(GpsTrackStaticVertex(GpsTrackStaticVertex::TNormal(-1.0f, 1.0f, 1.0f)));
staticVertexData.push_back(GpsTrackStaticVertex(GpsTrackStaticVertex::TNormal(-1.0f, -1.0f, 1.0f)));
staticVertexData.push_back(GpsTrackStaticVertex(GpsTrackStaticVertex::TNormal(1.0f, 1.0f, 1.0f)));
staticVertexData.push_back(GpsTrackStaticVertex(GpsTrackStaticVertex::TNormal(1.0f, -1.0f, 1.0f)));
}
vector<GpsTrackDynamicVertex> dynamicVertexData;
dynamicVertexData.resize(data.m_pointsCount * kVerticesInPoint);
dp::Batcher batcher(data.m_pointsCount * kIndicesInPoint, data.m_pointsCount * kVerticesInPoint);
dp::SessionGuard guard(batcher, [&data](dp::GLState const & state, drape_ptr<dp::RenderBucket> && b)
{
data.m_bucket = move(b);
data.m_state = state;
});
drape_ptr<dp::OverlayHandle> handle = make_unique_dp<GpsTrackHandle>(data.m_pointsCount);
dp::AttributeProvider provider(2 /* stream count */, staticVertexData.size());
provider.InitStream(0 /* stream index */, GetGpsTrackStaticBindingInfo(), make_ref(staticVertexData.data()));
provider.InitStream(1 /* stream index */, GetGpsTrackDynamicBindingInfo(), make_ref(dynamicVertexData.data()));
batcher.InsertListOfStrip(GetGpsTrackState(texMng), make_ref(&provider), move(handle), kVerticesInPoint);
GLFunctions::glFlush();
}
} // namespace df
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