Vendor rlottie sources with CMake and MinGW build adjustments

tools/chatgui/rlottie_src/example/win32Player/Source.cpp

@@ -0,0 +1,60 @@
+#include "rlottie.h"
+#include "animation.h"
+using namespace rlottie;
+
+std::unique_ptr<Animation> anim;
+uint32_t *buffer;
+size_t width, height;
+size_t bytesPerLine;
+uint32_t curColor = UINT32_MAX;
+
+void setAnimationSize(size_t w, size_t h)
+{
+	width = w;
+	height = h;
+	bytesPerLine = width * sizeof(uint32_t);
+
+    if (buffer != NULL) freeAnimation();
+	buffer = (uint32_t*)calloc(bytesPerLine * height, sizeof(uint32_t));
+}
+
+void setAnimation(char* path, size_t* w, size_t* h)
+{
+	anim = Animation::loadFromFile(path);
+    anim->size(*w, *h);
+    setAnimationSize(*w, *h);
+}
+
+uint32_t* renderRLottieAnimation(uint32_t frameNum)
+{
+	Surface surface = Surface(buffer, width, height, bytesPerLine);
+	anim->renderSync(frameNum, surface);
+	// background color
+	for (int i = 0; i < height; i++)
+        for (int j = 0; j < width; ++j)
+		{
+			uint32_t* v = buffer + i * width + j;
+			if (*v == 0) *v = curColor;
+		}
+	return buffer;
+}
+
+void setAnimationColor(int r, int g, int b)
+{
+	curColor = ((255 << 16) * r) + ((255 << 8) * g) + 255 * b;
+}
+
+size_t getTotalFrame()
+{
+	return anim->totalFrame();
+}
+
+bool isAnimNULL()
+{
+	return anim == NULL;
+}
+
+void freeAnimation()
+{
+    free(buffer);
+}