X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=input.h;h=8687690aa1386bb13776962ec987d48b26d14248;hp=b3eb836a26a8f9d4e1754ddc3574e866763dce2a;hb=3d1f6c11c53cd9d3d5c1fb60f4accf050b7f135e;hpb=6a31570f6a85004d33a83bbe2f77642614361da6

diff --git a/input.h b/input.h
index b3eb836..8687690 100644
--- a/input.h
+++ b/input.h
@@ -1,56 +1,36 @@
 #ifndef _INPUT_H
 #define _INPUT_H 1
 
+#include <assert.h>
+
 #include "effect.h"
 #include "image_format.h"
 
 // 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. Also, it
+// has an extra operation called finalize(), which runs when the effect chain
+// is finalized.
+//
+// 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; }
+	virtual 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;
-	}
+	virtual void finalize() = 0;
 
-	const unsigned char *get_pixel_data() const
-	{
-		return 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;
 
-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;
+	virtual ColorSpace get_color_space() const = 0;
+	virtual GammaCurve get_gamma_curve() const = 0;
 };
 
 #endif // !defined(_INPUT_H)