added render target and bezier classes, added stroke settings panel

engine/rtt.cpp

@@ -0,0 +1,134 @@
+#include "pch.h"
+#include "rtt.h"
+
+
+RTT::RTT()
+{
+    fboID = 0;
+    rboID = 0;
+    w = 0;
+    h = 0;
+}
+
+RTT::~RTT()
+{
+    //destroy();
+}
+
+void RTT::destroy()
+{
+    if (rboID)
+    {
+        glDeleteRenderbuffers(1, &rboID);
+    }
+    if (texID)
+    {
+        unbindTexture();
+        glDeleteTextures(1, &texID);
+    }
+    if (fboID)
+    {
+        unbindFramebuffer();
+        glDeleteFramebuffers(1, &fboID);
+    }
+    fboID = 0;
+    rboID = 0;
+    w = 0;
+    h = 0;
+}
+
+bool RTT::create(int width, int height, int tex/* = -1*/)
+{
+    // Destroy any previously created object
+    destroy();
+
+    w = width;
+    h = height;
+
+    if (tex == -1)
+    {
+        glGenTextures(1, &texID);
+    }
+    else
+    {
+        texID = tex;
+    }
+
+    glBindTexture(GL_TEXTURE_2D, texID);
+
+    if (tex == -1)
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, width, height, 0, GL_RGBA, GL_FLOAT, 0);
+
+//     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+//     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+//     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+//     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+    // Create a renderbuffer object to store depth info
+    glGenRenderbuffers(1, &rboID);
+    glBindRenderbuffer(GL_RENDERBUFFER, rboID);
+    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
+    glBindRenderbuffer(GL_RENDERBUFFER, 0);
+
+    // Create a framebuffer object
+    glGenFramebuffers(1, &fboID);
+    glBindFramebuffer(GL_FRAMEBUFFER, fboID);
+
+    // Attach the texture to FBO color attachment point
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texID, 0);
+
+    // Attach the renderbuffer to depth attachment point
+    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboID);
+
+    // Check FBO status
+    GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+    if (status != GL_FRAMEBUFFER_COMPLETE)
+        LOG("createColorBuffer failed");
+
+    // Switch back to window-system-provided framebuffer
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+    return status == GL_FRAMEBUFFER_COMPLETE;
+}
+
+void RTT::bindFramebuffer()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, fboID);
+}
+
+void RTT::unbindFramebuffer()
+{
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
+void RTT::clear(glm::vec4 color)
+{
+    glClearColor(color.r, color.g, color.b, color.a);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+void RTT::readTextureData(uint8_t* buffer)
+{
+    bindTexture();
+    glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer);
+    unbindTexture();
+}
+
+uint8_t* RTT::createBuffer()
+{
+    return new uint8_t[w * h * 3];
+}
+
+void RTT::bindTexture()
+{
+    glBindTexture(GL_TEXTURE_2D, texID);
+}
+
+void RTT::unbindTexture()
+{
+    glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+