rename engine to src

src/rtt.h

@@ -0,0 +1,34 @@
+#pragma once
+
+class RTT
+{
+    bool bound = false;
+    GLint oldRFboID = 0;
+    GLint oldDFboID = 0;
+    GLuint fboID = 0;
+    GLuint rboID = 0;
+    GLuint texID = 0;
+    int w = 0;
+    int h = 0;
+
+public:
+    RTT();
+    ~RTT();
+
+    void destroy();
+    bool create(int width, int height, int tex = -1, GLint internal_format = GL_RGBA8);
+    bool recreate() { return create(w, h); }
+    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; }
+    int bytes() { return w * h * 4; }
+    int stride() { return w * 4; }
+    GLuint getFBO() { return fboID; }
+};