7 #include "image_format.h"
9 // An input is a degenerate case of an effect; it represents the picture data
10 // that comes from the user. As such, it has zero “inputs” itself. Also, it
11 // has an extra operation called finalize(), which runs when the effect chain
14 // An input is, like any other effect, required to be able to output a GLSL
15 // fragment giving a RGBA value (although that GLSL fragment will have zero
16 // inputs itself), and set the required OpenGL state on set_gl_state(),
17 // including possibly uploading the texture if so required.
18 class Input : public Effect {
20 virtual unsigned num_inputs() const { return 0; }
22 // Create the texture itself. We cannot do this in the constructor,
23 // because we don't necessarily know all the settings (sRGB texture,
24 // mipmap generation) at that point.
25 virtual void finalize() = 0;
27 // Whether this input can deliver linear gamma directly if it's
28 // asked to. (If so, set the parameter “output_linear_gamma”
30 virtual bool can_output_linear_gamma() const = 0;
32 virtual unsigned get_width() const = 0;
33 virtual unsigned get_height() const = 0;
34 virtual ColorSpace get_color_space() const = 0;
35 virtual GammaCurve get_gamma_curve() const = 0;
38 #endif // !defined(_INPUT_H)