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, 34 insertions, 0 deletions

diff --git a/vendor/github.com/Benau/go_rlottie/vector_vdrawhelper_neon.cpp b/vendor/github.com/Benau/go_rlottie/vector_vdrawhelper_neon.cpp
new file mode 100644
index 00000000..24d7f579
--- /dev/null
+++ b/vendor/github.com/Benau/go_rlottie/vector_vdrawhelper_neon.cpp
@@ -0,0 +1,34 @@
+#include "config.h"
+#if defined(USE_ARM_NEON)
+
+#include "vector_vdrawhelper.h"
+
+extern "C" void pixman_composite_src_n_8888_asm_neon(int32_t w, int32_t h,
+                                                     uint32_t *dst,
+                                                     int32_t   dst_stride,
+                                                     uint32_t  src);
+
+extern "C" void pixman_composite_over_n_8888_asm_neon(int32_t w, int32_t h,
+                                                      uint32_t *dst,
+                                                      int32_t   dst_stride,
+                                                      uint32_t  src);
+
+void memfill32(uint32_t *dest, uint32_t value, int length)
+{
+    pixman_composite_src_n_8888_asm_neon(length, 1, dest, length, value);
+}
+
+static void color_SourceOver(uint32_t *dest, int length,
+                                      uint32_t color,
+                                     uint32_t const_alpha)
+{
+    if (const_alpha != 255) color = BYTE_MUL(color, const_alpha);
+
+    pixman_composite_over_n_8888_asm_neon(length, 1, dest, length, color);
+}
+
+void RenderFuncTable::neon()
+{
+    updateColor(BlendMode::Src , color_SourceOver);
+}
+#endif