Don't re-render the display if nothing has changed

[ipdf/code.git] / src / framebuffer.h

diff --git a/src/framebuffer.h b/src/framebuffer.h
new file mode 100644 (file)
index 0000000..e3ec6fa
--- /dev/null
+++ b/src/framebuffer.h
@@ -0,0 +1,36 @@
+#ifndef _FRAMEBUFFER_H
+#define _FRAMEBUFFER_H
+
+#include <SDL.h>
+#define GL_GLEXT_PROTOTYPES
+#include <SDL_opengl.h>
+
+
+namespace IPDF
+{
+       /*
+        * The "Screen" class handles managing the OS window (using SDL2).
+        */
+       class FrameBuffer
+       {
+       public:
+               FrameBuffer() : m_render_texture(0), m_render_fbo(0), m_width(0), m_height(0) {}
+               ~FrameBuffer() { Destroy(); }
+               void Create(int w, int h);
+               void Destroy();
+               void Bind();
+               void UnBind();
+               void Blit();
+               void Clear(float r=1.0, float g=1.0, float b=1.0, float a=1.0);
+               int GetWidth() { return m_width; }
+               int GetHeight() { return m_height; }
+       private:
+               GLuint m_render_texture;
+               GLuint m_render_fbo;
+               int m_width;
+               int m_height;
+       };
+
+}
+
+#endif // _SCREEN_H