- Input(ImageFormat format, unsigned width, unsigned height);
-
- unsigned num_inputs() const { return 0; }
-
- // Create the texture itself. We cannot do this in the constructor,
- // because we don't necessarily know all the settings (sRGB texture,
- // mipmap generation) at that point.
- void finalize();
-
- std::string output_fragment_shader();
-
- // Uploads the texture if it has changed since last time.
- void set_gl_state(GLuint glsl_program_num, const std::string& prefix, unsigned *sampler_num);
-
- // Tells the input where to fetch the actual pixel data. Note that if you change
- // this data, you must either call set_pixel_data() again (using the same pointer
- // is fine), or invalidate_pixel_data(). Otherwise, the texture won't be re-uploaded
- // on subsequent frames.
- void set_pixel_data(const unsigned char *pixel_data)
- {
- this->pixel_data = pixel_data;
- invalidate_pixel_data();
- }
-
- void invalidate_pixel_data()
- {
- needs_update = true;
- }
-
- const unsigned char *get_pixel_data() const
- {
- return pixel_data;
- }
-
-private:
- ImageFormat image_format;
- GLenum format;
- GLuint pbo, texture_num;
- bool needs_update;
- int use_srgb_texture_format, needs_mipmaps;
- unsigned width, height, bytes_per_pixel;
- const unsigned char *pixel_data;
+ unsigned num_inputs() const override { return 0; }
+
+ // Whether this input can deliver linear gamma directly if it's
+ // asked to. (If so, set the parameter “output_linear_gamma”
+ // to activate it.)
+ virtual bool can_output_linear_gamma() const = 0;
+
+ // Whether this input can supply mipmaps if asked to (by setting
+ // the "needs_mipmaps" integer parameter set to 1).
+ virtual bool can_supply_mipmaps() const { return true; }
+
+ virtual unsigned get_width() const = 0;
+ virtual unsigned get_height() const = 0;
+ virtual Colorspace get_color_space() const = 0;
+ virtual GammaCurve get_gamma_curve() const = 0;