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#include "drape_frontend/path_symbol_shape.hpp"
#include "drape_frontend/visual_params.hpp"
#include "drape/utils/vertex_decl.hpp"
#include "drape/glsl_types.hpp"
#include "drape/glsl_func.hpp"
#include "drape/overlay_handle.hpp"
#include "drape/shader_def.hpp"
#include "drape/attribute_provider.hpp"
#include "drape/texture_manager.hpp"
#include "drape/glstate.hpp"
#include "drape/batcher.hpp"
namespace df
{
PathSymbolShape::PathSymbolShape(m2::SharedSpline const & spline,
PathSymbolViewParams const & params)
: m_params(params)
, m_spline(spline)
{
}
void PathSymbolShape::Draw(ref_ptr<dp::Batcher> batcher, ref_ptr<dp::TextureManager> textures) const
{
dp::TextureManager::SymbolRegion region;
textures->GetSymbolRegion(m_params.m_symbolName, region);
m2::RectF const & rect = region.GetTexRect();
m2::PointU pixelSize = region.GetPixelSize();
float halfW = pixelSize.x / 2.0f;
float halfH = pixelSize.y / 2.0f;
gpu::TSolidTexVertexBuffer buffer;
m2::Spline::iterator splineIter = m_spline.CreateIterator();
double pToGScale = 1.0 / m_params.m_baseGtoPScale;
splineIter.Advance(m_params.m_offset * pToGScale);
float step = m_params.m_step * pToGScale;
glsl::vec2 dummy(0.0, 0.0);
while (!splineIter.BeginAgain())
{
glsl::vec2 const pivot = glsl::ToVec2(ConvertToLocal(splineIter.m_pos, m_params.m_tileCenter, kShapeCoordScalar));
glsl::vec2 n = halfH * glsl::normalize(glsl::vec2(-splineIter.m_dir.y, splineIter.m_dir.x));
glsl::vec2 d = halfW * glsl::normalize(glsl::vec2(splineIter.m_dir.x, splineIter.m_dir.y));
float nLength = glsl::length(n) * pToGScale;
float dLength = glsl::length(d) * pToGScale;
n = nLength * glsl::normalize(n);
d = dLength * glsl::normalize(d);
buffer.emplace_back(gpu::SolidTexturingVertex(glsl::vec4(pivot, m_params.m_depth, 0.0f), - d - n, glsl::ToVec2(rect.LeftTop())));
buffer.emplace_back(gpu::SolidTexturingVertex(glsl::vec4(pivot, m_params.m_depth, 0.0f), - d + n, glsl::ToVec2(rect.LeftBottom())));
buffer.emplace_back(gpu::SolidTexturingVertex(glsl::vec4(pivot, m_params.m_depth, 0.0f), d - n, glsl::ToVec2(rect.RightTop())));
buffer.emplace_back(gpu::SolidTexturingVertex(glsl::vec4(pivot, m_params.m_depth, 0.0f), d + n, glsl::ToVec2(rect.RightBottom())));
splineIter.Advance(step);
}
if (buffer.empty())
return;
dp::GLState state(gpu::PATH_SYMBOL_LINE, dp::GLState::GeometryLayer);
state.SetColorTexture(region.GetTexture());
dp::AttributeProvider provider(1, buffer.size());
provider.InitStream(0, gpu::SolidTexturingVertex::GetBindingInfo(), make_ref(buffer.data()));
batcher->InsertListOfStrip(state, make_ref(&provider), 4);
}
}
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