Chapter 19. Shaders for Imaging

One of the longtime strengths of OpenGL relative to other graphics APIs is that it has always included facilities for both imaging and 3D rendering operations. Applications can take advantage of both capabilities as needed. For instance, a video effects application might exploit OpenGL’s imaging capabilities to send a sequence of images (i.e., a video stream) to OpenGL and have the images texture-mapped onto a three-dimensional object. Color space conversion or color correction can be applied to the images as they are sent to OpenGL. Traditional graphics rendering effects such as lighting and fog can also be applied to the object.

The initial release of the OpenGL Shading Language focused primarily on providing support ...

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