-#ifndef _INPUT_H
-#define _INPUT_H 1
+#ifndef _MOVIT_INPUT_H
+#define _MOVIT_INPUT_H 1
#include <assert.h>
#include "effect.h"
#include "image_format.h"
+namespace movit {
+
// An input is a degenerate case of an effect; it represents the picture data
-// that comes from the user. As such, it has zero “inputs” itself, and some of
-// the normal operations don't really make sense for it.
+// that comes from the user. As such, it has zero “inputs” itself.
+//
+// An input is, like any other effect, required to be able to output a GLSL
+// fragment giving a RGBA value (although that GLSL fragment will have zero
+// inputs itself), and set the required OpenGL state on set_gl_state(),
+// including possibly uploading the texture if so required.
class Input : public Effect {
public:
- 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);
+ virtual unsigned num_inputs() const { return 0; }
- // 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();
- }
+ // 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;
- void invalidate_pixel_data()
- {
- needs_update = true;
- }
+ // 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; }
- const unsigned char *get_pixel_data() const
- {
- return pixel_data;
- }
-
- void set_pitch(unsigned pitch) {
- assert(!finalized);
- this->pitch = pitch;
- }
-
- unsigned get_pitch() {
- return pitch;
- }
-
-private:
- ImageFormat image_format;
- GLenum format;
- GLuint pbo, texture_num;
- bool needs_update, finalized;
- int use_srgb_texture_format, needs_mipmaps;
- unsigned width, height, pitch, bytes_per_pixel;
- const unsigned char *pixel_data;
+ 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;
};
-#endif // !defined(_INPUT_H)
+} // namespace movit
+
+#endif // !defined(_MOVIT_INPUT_H)