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#pragma once
#include <mbgl/shader/attributes.hpp>
#include <mbgl/util/geometry.hpp>
#include <cmath>
namespace mbgl {
struct SymbolAttributes : gl::Attributes<
attributes::a_pos,
attributes::a_offset,
attributes::a_texture_pos,
attributes::a_data<4>>
{
static Vertex vertex(Point<float> a,
Point<float> o,
uint16_t tx,
uint16_t ty,
float minzoom,
float maxzoom,
float labelminzoom,
uint8_t labelangle) {
return Vertex {
{
static_cast<int16_t>(a.x),
static_cast<int16_t>(a.y)
},
{
static_cast<int16_t>(::round(o.x * 64)), // use 1/64 pixels for placement
static_cast<int16_t>(::round(o.y * 64))
},
{
static_cast<uint16_t>(tx / 4),
static_cast<uint16_t>(ty / 4)
},
{
static_cast<uint8_t>(labelminzoom * 10), // 1/10 zoom levels: z16 == 160
static_cast<uint8_t>(labelangle),
static_cast<uint8_t>(minzoom * 10),
static_cast<uint8_t>(::fmin(maxzoom, 25) * 10)
}
};
}
};
using SymbolVertex = SymbolAttributes::Vertex;
static_assert(sizeof(SymbolVertex) == 16, "expected SymbolVertex size");
} // namespace mbgl
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