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#include <mbgl/geometry/debug_font_buffer.hpp>
#include <mbgl/geometry/debug_font_data.hpp>
#include <mbgl/gl/gl.hpp>
#include <cmath>
#include <cstring>
namespace mbgl {
void DebugFontBuffer::addText(const char *text, double left, double baseline, double scale) {
uint16_t *coords = nullptr;
const size_t len = strlen(text);
for (size_t i = 0; i < len; ++i) {
if (text[i] < 32 || (unsigned char)(text[i]) >= 127) {
continue;
}
const glyph& glyph = simplex[text[i] - 32];
int16_t prev_x = -1, prev_y = -1, prev = false;
for (int32_t j = 0; j < glyph.length; j += 2) {
if (glyph.data[j] == -1 && glyph.data[j + 1] == -1) {
prev = false;
} else {
int16_t x = ::round(left + glyph.data[j] * scale);
int16_t y = ::round(baseline - glyph.data[j + 1] * scale);
if (prev) {
coords = static_cast<uint16_t *>(addElement());
coords[0] = prev_x;
coords[1] = prev_y;
coords = static_cast<uint16_t *>(addElement());
coords[0] = x;
coords[1] = y;
}
prev_x = x; prev_y = y; prev = true;
}
}
left += glyph.width * scale;
}
}
} // namespace mbgl
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