lovr/src/api/l_data_rasterizer.c

#include "api.h"
#include "data/rasterizer.h"
#include "util.h"
#include <lua.h>
#include <lauxlib.h>

static int l_lovrRasterizerGetHeight(lua_State* L) {
  Rasterizer* rasterizer = luax_checktype(L, 1, Rasterizer);
  lua_pushinteger(L, lovrRasterizerGetHeight(rasterizer));
  return 1;
}

static int l_lovrRasterizerGetAdvance(lua_State* L) {
  Rasterizer* rasterizer = luax_checktype(L, 1, Rasterizer);
  lua_pushinteger(L, lovrRasterizerGetAdvance(rasterizer));
  return 1;
}

static int l_lovrRasterizerGetAscent(lua_State* L) {
  Rasterizer* rasterizer = luax_checktype(L, 1, Rasterizer);
  lua_pushinteger(L, lovrRasterizerGetAscent(rasterizer));
  return 1;
}

static int l_lovrRasterizerGetDescent(lua_State* L) {
  Rasterizer* rasterizer = luax_checktype(L, 1, Rasterizer);
  lua_pushinteger(L, lovrRasterizerGetDescent(rasterizer));
  return 1;
}

static int l_lovrRasterizerGetLineHeight(lua_State* L) {
  Rasterizer* rasterizer = luax_checktype(L, 1, Rasterizer);
  lua_pushinteger(L, lovrRasterizerGetHeight(rasterizer) * 1.25f);
  return 1;
}

static int l_lovrRasterizerGetGlyphCount(lua_State* L) {
  Rasterizer* rasterizer = luax_checktype(L, 1, Rasterizer);
  lua_pushinteger(L, lovrRasterizerGetGlyphCount(rasterizer));
  return 1;
}

static int l_lovrRasterizerHasGlyphs(lua_State* L) {
  Rasterizer* rasterizer = luax_checktype(L, 1, Rasterizer);
  bool hasGlyphs = true;
  for (int i = 2; i <= lua_gettop(L); i++) {
    if (lua_type(L, i) == LUA_TSTRING) {
      hasGlyphs &= lovrRasterizerHasGlyphs(rasterizer, lua_tostring(L, i));
    } else {
      hasGlyphs &= lovrRasterizerHasGlyph(rasterizer, luax_checku32(L, i));
    }
  }
  lua_pushboolean(L, hasGlyphs);
  return 1;
}

static int l_lovrRasterizerGetWidth(lua_State* L) {
  Rasterizer* rasterizer = luax_checktype(L, 1, Rasterizer);
  size_t length;
  const char* string = luaL_checklstring(L, 2, &length);
  float wrap = luax_optfloat(L, 4, 0.f);
  float width, lastLineWidth, height;
  uint32_t lineCount, glyphCount;
  lovrRasterizerMeasure(rasterizer, string, length, wrap, &width, &lastLineWidth, &height, &lineCount, &glyphCount);
  lua_pushnumber(L, width);
  lua_pushnumber(L, lineCount + 1);
  lua_pushnumber(L, lastLineWidth);
  return 2;
}

const luaL_Reg lovrRasterizer[] = {
  { "getHeight", l_lovrRasterizerGetHeight },
  { "getAdvance", l_lovrRasterizerGetAdvance },
  { "getAscent", l_lovrRasterizerGetAscent },
  { "getDescent", l_lovrRasterizerGetDescent },
  { "getLineHeight", l_lovrRasterizerGetLineHeight },
  { "getGlyphCount", l_lovrRasterizerGetGlyphCount },
  { "hasGlyphs", l_lovrRasterizerHasGlyphs },
  { "getWidth", l_lovrRasterizerGetWidth },
  { NULL, NULL }
};