X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=input.h;fp=input.h;h=dd80bb61ca6f82b3822300239d993aed6368231a;hp=0000000000000000000000000000000000000000;hb=d3cf1194740dbecde06f5e721a7e1910437a7666;hpb=f6acc0d1d488567e651220ffd327591c1443f49b

diff --git a/input.h b/input.h
new file mode 100644
index 0000000..dd80bb6
--- /dev/null
+++ b/input.h
@@ -0,0 +1,56 @@
+#ifndef _INPUT_H
+#define _INPUT_H 1
+
+#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.
+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);
+
+	// 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 texture_num;
+	bool needs_update;
+	int use_srgb_texture_format, needs_mipmaps;
+	unsigned width, height, bytes_per_pixel;
+	const unsigned char *pixel_data;
+};
+
+#endif // !defined(_INPUT_H)