Add framebuffer viewport setting

• Add BoundFramebuffer::setViewport method
• Fix C-style cast warnings in the file

src/glow/objects/raii/BoundFramebuffer.hh

@@ -6,6 +6,8 @@
 #include <glow/fwd.hh>
 #include <glow/gl.hh>
 
+#include <glm/vec2.hpp>
+
 #include "../FramebufferAttachment.hh"
 
 namespace glow
@@ -48,6 +50,9 @@ struct BoundFramebuffer
     /// May bind an texture
     void attachDepth(GLenum depthFormat = GL_DEPTH_COMPONENT32);
 
+    /// Override the default, attachment-based viewport setting
+    void setViewport(glm::ivec2 const& size);
+
 private:
     GLint previousBuffer;                      ///< previously bound buffer
     std::array<GLenum, 8> previousDrawBuffers; ///< previously setup draw buffers