added render target and bezier classes, added stroke settings panel

engine/rtt.h

@@ -0,0 +1,28 @@
+#pragma once
+
+class RTT
+{
+    GLuint fboID;
+    GLuint rboID;
+    GLuint texID;
+    int w;
+    int h;
+
+public:
+    RTT();
+    ~RTT();
+
+    void destroy();
+    bool create(int width, int height, int tex = -1);
+    void clear(glm::vec4 color = glm::vec4(0));
+    void readTextureData(uint8_t* buffer);
+    uint8_t* createBuffer();
+    void bindFramebuffer();
+    void unbindFramebuffer();
+    void bindTexture();
+    void unbindTexture();
+    GLuint getTextureID() { return texID; }
+    int getWidth() { return w; }
+    int getHeight() { return h; }
+    GLuint getFBO() { return fboID; }
+};