Convert .tgs with go libraries (and cgo) (telegram) (#1569)

This commit adds support for go/cgo tgs conversion when building with the -tags `cgo`
The default binaries are still "pure" go and uses the old way of converting.

* Move lottie_convert.py conversion code to its own file

* Add optional libtgsconverter

* Update vendor

* Apply suggestions from code review

* Update bridge/helper/libtgsconverter.go

Co-authored-by: Wim <wim@42.be>

1 files changed, 302 insertions, 0 deletions

diff --git a/vendor/github.com/Benau/go_rlottie/vector_vglobal.h b/vendor/github.com/Benau/go_rlottie/vector_vglobal.h
new file mode 100644
index 00000000..678ee199
--- /dev/null
+++ b/vendor/github.com/Benau/go_rlottie/vector_vglobal.h
@@ -0,0 +1,302 @@
+/*
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd. All rights reserved.
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef VGLOBAL_H
+#define VGLOBAL_H
+
+#include <cmath>
+#include <cstdint>
+#include <iostream>
+#include <type_traits>
+#include <utility>
+
+using uint   = uint32_t;
+using ushort = uint16_t;
+using uchar  = uint8_t;
+
+#if !defined(V_NAMESPACE)
+
+#define V_USE_NAMESPACE
+#define V_BEGIN_NAMESPACE
+#define V_END_NAMESPACE
+
+#else /* user namespace */
+
+#define V_USE_NAMESPACE using namespace ::V_NAMESPACE;
+#define V_BEGIN_NAMESPACE namespace V_NAMESPACE {
+#define V_END_NAMESPACE }
+
+#endif
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0
+#endif /* !__has_attribute */
+
+#if __has_attribute(unused)
+# define V_UNUSED __attribute__((__unused__))
+#else
+# define V_UNUSED
+#endif /* V_UNUSED */
+
+#if __has_attribute(warn_unused_result)
+# define V_REQUIRED_RESULT __attribute__((__warn_unused_result__))
+#else
+# define V_REQUIRED_RESULT
+#endif /* V_REQUIRED_RESULT */
+
+#define V_CONSTEXPR constexpr
+#define V_NOTHROW noexcept
+
+#include "vector_vdebug.h"
+
+#if __GNUC__ >= 7
+#define VECTOR_FALLTHROUGH __attribute__ ((fallthrough));
+#else
+#define VECTOR_FALLTHROUGH
+#endif
+
+#ifdef LOTTIE_THREAD_SUPPORT
+#define vthread_local thread_local
+#else
+#define vthread_local
+#endif
+
+#if defined(_MSC_VER)
+    #define V_ALWAYS_INLINE __forceinline
+#else
+    #define V_ALWAYS_INLINE __attribute__((always_inline))
+#endif
+
+template <typename T>
+V_CONSTEXPR inline const T &vMin(const T &a, const T &b)
+{
+    return (a < b) ? a : b;
+}
+template <typename T>
+V_CONSTEXPR inline const T &vMax(const T &a, const T &b)
+{
+    return (a < b) ? b : a;
+}
+
+static const double EPSILON_DOUBLE = 0.000000000001f;
+static const float  EPSILON_FLOAT = 0.000001f;
+
+static inline bool vCompare(float p1, float p2)
+{
+    return (std::abs(p1 - p2) < EPSILON_FLOAT);
+}
+
+static inline bool vIsZero(float f)
+{
+    return (std::abs(f) <= EPSILON_FLOAT);
+}
+
+static inline bool vIsZero(double f)
+{
+    return (std::abs(f) <= EPSILON_DOUBLE);
+}
+
+class vFlagHelper {
+    int i;
+
+public:
+    explicit constexpr inline vFlagHelper(int ai) noexcept : i(ai) {}
+    constexpr inline operator int() const noexcept { return i; }
+
+    explicit constexpr inline vFlagHelper(uint ai) noexcept : i(int(ai)) {}
+    explicit constexpr inline vFlagHelper(short ai) noexcept : i(int(ai)) {}
+    explicit constexpr inline vFlagHelper(ushort ai) noexcept : i(int(uint(ai))) {}
+    constexpr inline operator uint() const noexcept { return uint(i); }
+};
+
+template <typename Enum>
+class vFlag {
+public:
+    static_assert(
+        (sizeof(Enum) <= sizeof(int)),
+        "vFlag only supports int as storage so bigger type will overflow");
+    static_assert((std::is_enum<Enum>::value),
+                  "vFlag is only usable on enumeration types.");
+
+    using Int = typename std::conditional<
+        std::is_unsigned<typename std::underlying_type<Enum>::type>::value,
+        unsigned int, signed int>::type;
+
+    using  enum_type = Enum;
+    // compiler-generated copy/move ctor/assignment operators are fine!
+
+    vFlag() = default;
+    constexpr vFlag(Enum f) noexcept : i(Int(f)) {}
+    explicit constexpr vFlag(vFlagHelper f) noexcept : i(f) {}
+
+    inline vFlag &operator&=(int mask) noexcept
+    {
+        i &= mask;
+        return *this;
+    }
+    inline vFlag &operator&=(uint mask) noexcept
+    {
+        i &= mask;
+        return *this;
+    }
+    inline vFlag &operator&=(Enum mask) noexcept
+    {
+        i &= Int(mask);
+        return *this;
+    }
+    inline vFlag &operator|=(vFlag f) noexcept
+    {
+        i |= f.i;
+        return *this;
+    }
+    inline vFlag &operator|=(Enum f) noexcept
+    {
+        i |= Int(f);
+        return *this;
+    }
+    inline vFlag &operator^=(vFlag f) noexcept
+    {
+        i ^= f.i;
+        return *this;
+    }
+    inline vFlag &operator^=(Enum f) noexcept
+    {
+        i ^= Int(f);
+        return *this;
+    }
+
+    constexpr inline operator Int() const noexcept { return i; }
+
+    constexpr inline vFlag operator|(vFlag f) const
+    {
+        return vFlag(vFlagHelper(i | f.i));
+    }
+    constexpr inline vFlag operator|(Enum f) const noexcept
+    {
+        return vFlag(vFlagHelper(i | Int(f)));
+    }
+    constexpr inline vFlag operator^(vFlag f) const noexcept
+    {
+        return vFlag(vFlagHelper(i ^ f.i));
+    }
+    constexpr inline vFlag operator^(Enum f) const noexcept
+    {
+        return vFlag(vFlagHelper(i ^ Int(f)));
+    }
+    constexpr inline vFlag operator&(int mask) const noexcept
+    {
+        return vFlag(vFlagHelper(i & mask));
+    }
+    constexpr inline vFlag operator&(uint mask) const noexcept
+    {
+        return vFlag(vFlagHelper(i & mask));
+    }
+    constexpr inline vFlag operator&(Enum f) const noexcept
+    {
+        return vFlag(vFlagHelper(i & Int(f)));
+    }
+    constexpr inline vFlag operator~() const noexcept
+    {
+        return vFlag(vFlagHelper(~i));
+    }
+
+    constexpr inline bool operator!() const noexcept { return !i; }
+
+    constexpr inline bool testFlag(Enum f) const noexcept
+    {
+        return (i & Int(f)) == Int(f) && (Int(f) != 0 || i == Int(f));
+    }
+    inline vFlag &setFlag(Enum f, bool on = true) noexcept
+    {
+        return on ? (*this |= f) : (*this &= ~f);
+    }
+
+    Int i{0};
+};
+
+class VColor {
+public:
+    VColor() = default;
+    explicit VColor(uchar red, uchar green, uchar blue, uchar alpha = 255) noexcept
+        :a(alpha), r(red), g(green), b(blue){}
+    inline uchar  red() const noexcept { return r; }
+    inline uchar  green() const noexcept { return g; }
+    inline uchar  blue() const noexcept { return b; }
+    inline uchar  alpha() const noexcept { return a; }
+    inline void setRed(uchar red) noexcept { r = red; }
+    inline void setGreen(uchar green) noexcept { g = green; }
+    inline void setBlue(uchar blue) noexcept { b = blue; }
+    inline void setAlpha(uchar alpha) noexcept { a = alpha; }
+    inline bool isOpaque() const { return a == 255; }
+    inline bool isTransparent() const { return a == 0; }
+    inline bool operator==(const VColor &o) const
+    {
+        return ((a == o.a) && (r == o.r) && (g == o.g) && (b == o.b));
+    }
+    uint premulARGB() const
+    {
+        int pr = (r * a) / 255;
+        int pg = (g * a) / 255;
+        int pb = (b * a) / 255;
+        return uint((a << 24) | (pr << 16) | (pg << 8) | (pb));
+    }
+
+    uint premulARGB(float opacity) const
+    {
+        int alpha = int(a * opacity);
+        int pr = (r * alpha) / 255;
+        int pg = (g * alpha) / 255;
+        int pb = (b * alpha) / 255;
+        return uint((alpha << 24) | (pr << 16) | (pg << 8) | (pb));
+    }
+
+public:
+    uchar a{0};
+    uchar r{0};
+    uchar g{0};
+    uchar b{0};
+};
+
+enum class FillRule: unsigned char { EvenOdd, Winding };
+enum class JoinStyle: unsigned char { Miter, Bevel, Round };
+enum class CapStyle: unsigned char { Flat, Square, Round };
+
+enum class BlendMode {
+    Src,
+    SrcOver,
+    DestIn,
+    DestOut,
+    Last,
+};
+
+#ifndef V_CONSTRUCTOR_FUNCTION
+#define V_CONSTRUCTOR_FUNCTION0(AFUNC)            \
+    namespace {                                   \
+    static const struct AFUNC##_ctor_class_ {     \
+        inline AFUNC##_ctor_class_() { AFUNC(); } \
+    } AFUNC##_ctor_instance_;                     \
+    }
+
+#define V_CONSTRUCTOR_FUNCTION(AFUNC) V_CONSTRUCTOR_FUNCTION0(AFUNC)
+#endif
+
+#endif  // VGLOBAL_H