| #ifndef LRT__GLTEXTURE_FB_HXX |
| #define LRT__GLTEXTURE_FB_HXX |
| |
| #include "../FrameBuffer.hxx" |
| #include <GL/gl.h> |
| |
| |
| namespace LRT BEGIN_NAMESPACE |
| |
| /*! framebuffer that uses an opengl texture for display. this is the |
| base class that handles texture allocation, resizing, and display, |
| but *not* the uploading (the latter has to be done in subclasses |
| that use either glTex(Sub)Image or any other method to upload. this |
| particular class */ |
| struct OpenGLTextureRGBA8FB : public RGBAucharFrameBuffer |
| { |
| // static const int FRAME_BUFFER_MODE = GL_RGBA; |
| static const int FRAME_BUFFER_MODE = GL_BGRA; |
| |
| GLuint fbTextureID; |
| vec2i fbTextureRes; |
| vec2f fbTexCoords; |
| |
| /*! make sure to call resize at least one before accessing the texture ... |
| |
| \note might want to pass an initializer for resx,resy to the parent class |
| */ |
| OpenGLTextureRGBA8FB() |
| { |
| glGenTextures(1, &fbTextureID); |
| glBindTexture(GL_TEXTURE_2D, fbTextureID); |
| fbTextureRes = vec2i(0,0); |
| } |
| |
| virtual void resize(int newX, int newY); |
| virtual void startNewFrame() { /* do nothing */ }; |
| virtual void doneWithFrame() = 0; /* *MUST* be implemented by |
| *subclass, becuase this base |
| *class does not handle |
| *uploading the pixels itself */ |
| |
| /*! display the pixels as a window-aligned textured quad. note that |
| this is *not* actually what an application might want -- it might |
| want to have the pixels uploaded to a texture, but to place a quad |
| with that texture to a totally different position or orientation |
| (e.g., the app might have three or four different 'frame buffers' |
| that cover different parts of the full viewport). let's not worry |
| about that, yet. */ |
| virtual void display(); |
| }; |
| |
| |
| /*! opengl texture for display, but local buffer that will be uploaded |
| at the very end via gltex(sub)image */ |
| struct BufferedOpenGLTextureRGBA8FB : public OpenGLTextureRGBA8FB |
| { |
| int allocedSize; |
| |
| BufferedOpenGLTextureRGBA8FB() : OpenGLTextureRGBA8FB(), allocedSize(0) |
| {} |
| virtual void resize(int newX, int newY); |
| virtual void doneWithFrame(); |
| }; |
| |
| |
| END_NAMESPACE |
| |
| |
| #endif |
