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#include "drape_frontend/circles_pack_shape.hpp"
#include "drape_frontend/batcher_bucket.hpp"
#include "shaders/programs.hpp"
#include "drape/attribute_provider.hpp"
#include "drape/batcher.hpp"
#include "drape/glsl_func.hpp"
#include "drape/glsl_types.hpp"
#include "drape/graphics_context.hpp"
#include "drape/texture_manager.hpp"
#include <memory>
namespace df
{
namespace
{
uint32_t const kDynamicStreamID = 0x7F;
struct CirclesPackStaticVertex
{
using TNormal = glsl::vec3;
CirclesPackStaticVertex() = default;
explicit CirclesPackStaticVertex(TNormal const & normal) : m_normal(normal) {}
TNormal m_normal;
};
dp::RenderState GetCirclesPackState(ref_ptr<dp::TextureManager> texMng)
{
auto state = CreateRenderState(gpu::Program::CirclePoint, DepthLayer::OverlayLayer);
state.SetColorTexture(texMng->GetSymbolsTexture());
state.SetDepthTestEnabled(false);
return state;
}
dp::BindingInfo const & GetCirclesPackStaticBindingInfo()
{
static std::unique_ptr<dp::BindingInfo> s_info;
if (s_info == nullptr)
{
dp::BindingFiller<CirclesPackStaticVertex> filler(1);
filler.FillDecl<CirclesPackStaticVertex::TNormal>("a_normal");
s_info.reset(new dp::BindingInfo(filler.m_info));
}
return *s_info;
}
dp::BindingInfo const & GetCirclesPackDynamicBindingInfo()
{
static std::unique_ptr<dp::BindingInfo> s_info;
if (s_info == nullptr)
{
dp::BindingFiller<CirclesPackDynamicVertex> filler(2, kDynamicStreamID);
filler.FillDecl<CirclesPackDynamicVertex::TPosition>("a_position");
filler.FillDecl<CirclesPackDynamicVertex::TColor>("a_color");
s_info.reset(new dp::BindingInfo(filler.m_info));
}
return *s_info;
}
} // namespace
CirclesPackHandle::CirclesPackHandle(size_t pointsCount)
: OverlayHandle(FeatureID(), dp::Anchor::Center, 0 /* priority */, 1 /* minVisibleScale */, false)
, m_needUpdate(false)
{
m_buffer.resize(pointsCount * dp::Batcher::VertexPerQuad);
}
void CirclesPackHandle::GetAttributeMutation(ref_ptr<dp::AttributeBufferMutator> mutator) const
{
if (!m_needUpdate)
return;
TOffsetNode const & node = GetOffsetNode(kDynamicStreamID);
ASSERT(node.first.GetElementSize() == sizeof(CirclesPackDynamicVertex), ());
ASSERT(node.second.m_count == m_buffer.size(), ());
uint32_t const byteCount =
static_cast<uint32_t>(m_buffer.size()) * sizeof(CirclesPackDynamicVertex);
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 CirclesPackHandle::Update(ScreenBase const & screen)
{
UNUSED_VALUE(screen);
return true;
}
bool CirclesPackHandle::IndexesRequired() const { return false; }
m2::RectD CirclesPackHandle::GetPixelRect(ScreenBase const & screen, bool perspective) const
{
UNUSED_VALUE(screen);
UNUSED_VALUE(perspective);
return m2::RectD();
}
void CirclesPackHandle::GetPixelShape(ScreenBase const & screen, bool perspective,
Rects & rects) const
{
UNUSED_VALUE(screen);
UNUSED_VALUE(perspective);
}
void CirclesPackHandle::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 CirclesPackHandle::Clear()
{
memset(m_buffer.data(), 0, m_buffer.size() * sizeof(CirclesPackDynamicVertex));
m_needUpdate = true;
}
size_t CirclesPackHandle::GetPointsCount() const
{
return m_buffer.size() / dp::Batcher::VertexPerQuad;
}
void CirclesPackShape::Draw(ref_ptr<dp::GraphicsContext> context, ref_ptr<dp::TextureManager> texMng,
CirclesPackRenderData & data)
{
ASSERT_NOT_EQUAL(data.m_pointsCount, 0, ());
uint32_t const kVerticesInPoint = dp::Batcher::VertexPerQuad;
uint32_t const kIndicesInPoint = dp::Batcher::IndexPerQuad;
std::vector<CirclesPackStaticVertex> staticVertexData;
staticVertexData.reserve(data.m_pointsCount * kVerticesInPoint);
for (size_t i = 0; i < data.m_pointsCount; i++)
{
staticVertexData.emplace_back(CirclesPackStaticVertex::TNormal(-1.0f, 1.0f, 1.0f));
staticVertexData.emplace_back(CirclesPackStaticVertex::TNormal(-1.0f, -1.0f, 1.0f));
staticVertexData.emplace_back(CirclesPackStaticVertex::TNormal(1.0f, 1.0f, 1.0f));
staticVertexData.emplace_back(CirclesPackStaticVertex::TNormal(1.0f, -1.0f, 1.0f));
}
std::vector<CirclesPackDynamicVertex> dynamicVertexData;
dynamicVertexData.resize(data.m_pointsCount * kVerticesInPoint);
dp::Batcher batcher(data.m_pointsCount * kIndicesInPoint, data.m_pointsCount * kVerticesInPoint);
batcher.SetBatcherHash(static_cast<uint64_t>(BatcherBucket::Overlay));
dp::SessionGuard guard(context, batcher,
[&data](dp::RenderState const & state, drape_ptr<dp::RenderBucket> && b)
{
data.m_bucket = std::move(b);
data.m_state = state;
});
drape_ptr<dp::OverlayHandle> handle = make_unique_dp<CirclesPackHandle>(data.m_pointsCount);
dp::AttributeProvider provider(2 /* stream count */,
static_cast<uint32_t>(staticVertexData.size()));
provider.InitStream(0 /* stream index */, GetCirclesPackStaticBindingInfo(),
make_ref(staticVertexData.data()));
provider.InitStream(1 /* stream index */, GetCirclesPackDynamicBindingInfo(),
make_ref(dynamicVertexData.data()));
batcher.InsertListOfStrip(context, GetCirclesPackState(texMng), make_ref(&provider),
std::move(handle), kVerticesInPoint);
context->Flush();
}
} // namespace df
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