34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
#include <llmr/geometry/text_buffer.hpp>
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#include <llmr/platform/gl.hpp>
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#include <llmr/util/math.hpp>
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#include <cmath>
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using namespace llmr;
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const double TextVertexBuffer::angleFactor = 128 / M_PI;
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size_t TextVertexBuffer::add(const GlyphPosition& pos) {
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size_t idx = index();
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void *data = addElement();
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int16_t *shorts = static_cast<int16_t *>(data);
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shorts[0] = pos.x;
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shorts[1] = pos.y;
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shorts[2] = round(pos.ox * 64); // use 1/64 pixels for placement
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shorts[3] = round(pos.oy * 64);
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uint8_t *ubytes = static_cast<uint8_t *>(data);
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ubytes[8] = pos.tx / 4;
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ubytes[9] = pos.ty / 4;
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ubytes[10] = pos.labelminzoom * 10;
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ubytes[11] = pos.minzoom * 10; // 1/10 zoom levels: z16 == 160.
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ubytes[12] = fmin(pos.maxzoom, 25) * 10; // 1/10 zoom levels: z16 == 160.
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ubytes[13] = (int16_t)round(pos.angle * angleFactor) % 256;
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ubytes[14] = util::max((int16_t)round(pos.rangefrom * angleFactor), (int16_t)0) % 256;
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ubytes[15] = util::min((int16_t)round(pos.rangeto * angleFactor), (int16_t)255) % 256;
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return idx;
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}
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