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#include "drape_frontend/circle_shape.hpp"
#include "drape/utils/vertex_decl.hpp"
#include "drape/batcher.hpp"
#include "drape/attribute_provider.hpp"
#include "drape/glstate.hpp"
#include "drape/shader_def.hpp"
#include "drape/texture_manager.hpp"
namespace df
{
CircleShape::CircleShape(m2::PointF const & mercatorPt, CircleViewParams const & params)
: m_pt(mercatorPt)
, m_params(params)
{
}
void CircleShape::Draw(dp::RefPointer<dp::Batcher> batcher, dp::RefPointer<dp::TextureManager> textures) const
{
int const TriangleCount = 20;
double const etalonSector = (2.0 * math::pi) / static_cast<double>(TriangleCount);
dp::TextureManager::ColorRegion region;
textures->GetColorRegion(m_params.m_color, region);
glsl::vec2 colorPoint(glsl::ToVec2(region.GetTexRect().Center()));
buffer_vector<gpu::SolidTexturingVertex, 22> vertexes;
vertexes.push_back(gpu::SolidTexturingVertex
{
glsl::vec3(glsl::ToVec2(m_pt), m_params.m_depth),
glsl::vec2(0.0f, 0.0f),
colorPoint
});
m2::PointD startNormal(0.0f, m_params.m_radius);
for (size_t i = 0; i < TriangleCount + 1; ++i)
{
m2::PointD rotatedNormal = m2::Rotate(startNormal, (i) * etalonSector);
vertexes.push_back(gpu::SolidTexturingVertex
{
glsl::vec3(glsl::ToVec2(m_pt), m_params.m_depth),
glsl::ToVec2(rotatedNormal),
colorPoint
});
}
dp::GLState state(gpu::TEXTURING_PROGRAM, dp::GLState::OverlayLayer);
state.SetBlending(dp::Blending(true));
state.SetColorTexture(region.GetTexture());
dp::OverlayHandle * overlay = new dp::SquareHandle(m_params.m_id,
dp::Center, m_pt,
m2::PointD(m_params.m_radius, m_params.m_radius),
m_params.m_depth);
dp::AttributeProvider provider(1, TriangleCount + 2);
provider.InitStream(0, gpu::SolidTexturingVertex::GetBindingInfo(), dp::MakeStackRefPointer<void>(vertexes.data()));
batcher->InsertTriangleFan(state, dp::MakeStackRefPointer(&provider), dp::MovePointer(overlay));
}
} // namespace df
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