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#include <mbgl/geometry/icon_buffer.hpp>
#include <mbgl/platform/gl.hpp>
#include <mbgl/util/math.hpp>
#include <cmath>
namespace mbgl {
const double IconVertexBuffer::angleFactor = 128.0 / M_PI;
size_t IconVertexBuffer::add(int16_t x, int16_t y, float ox, float oy, int16_t tx, int16_t ty, float angle, float minzoom, std::array<float, 2> range, float maxzoom, float labelminzoom) {
const size_t idx = index();
void *data = addElement();
int16_t *shorts = static_cast<int16_t *>(data);
shorts[0] /* pos */ = x;
shorts[1] /* pos */ = y;
shorts[2] /* offset */ = std::round(ox * 64); // use 1/64 pixels for placement
shorts[3] /* offset */ = std::round(oy * 64);
uint8_t *ubytes = static_cast<uint8_t *>(data);
// a_data1
ubytes[8] /* tex */ = tx / 4;
ubytes[9] /* tex */ = ty / 4;
ubytes[10] /* labelminzoom */ = labelminzoom * 10;
ubytes[11] /* angle */ = (int16_t)std::round(angle * angleFactor) % 256;
// a_data2
ubytes[12] /* minzoom */ = minzoom * 10; // 1/10 zoom levels: z16 == 160.
ubytes[13] /* maxzoom */ = std::fmin(maxzoom, 25) * 10; // 1/10 zoom levels: z16 == 160.
ubytes[14] /* rangeend */ = util::max((int16_t)std::round(range[0] * angleFactor), (int16_t)0) % 256;
ubytes[15] /* rangestart */ = util::min((int16_t)std::round(range[1] * angleFactor), (int16_t)255) % 256;
return idx;
}
}
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