-#ifndef _BLUR_EFFECT_H
-#define _BLUR_EFFECT_H 1
+#ifndef _MOVIT_BLUR_EFFECT_H
+#define _MOVIT_BLUR_EFFECT_H 1
// A separable 2D blur implemented by a combination of mipmap filtering
// and convolution (essentially giving a convolution with a piecewise linear
// which is what the user is intended to use, instantiates two copies of
// SingleBlurPassEffect behind the scenes).
+#include <epoxy/gl.h>
+#include <assert.h>
+#include <stddef.h>
+#include <string>
+
#include "effect.h"
+namespace movit {
+
+class EffectChain;
+class Node;
class SingleBlurPassEffect;
class BlurEffect : public Effect {
public:
BlurEffect();
+ virtual std::string effect_type_id() const { return "BlurEffect"; }
+
+ // We want this for the same reason as ResizeEffect; we could end up scaling
+ // down quite a lot.
+ virtual bool needs_texture_bounce() const { return true; }
+ virtual bool needs_mipmaps() const { return true; }
+ virtual bool needs_srgb_primaries() const { return false; }
+
+ virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height);
+
virtual std::string output_fragment_shader() {
assert(false);
}
- virtual void set_uniforms(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) {
+ virtual void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) {
assert(false);
}
- virtual bool needs_texture_bounce() const { return true; }
- virtual bool needs_mipmaps() const { return true; }
- virtual void add_self_to_effect_chain(EffectChain *chain, const std::vector<Effect *> &input);
+ virtual void rewrite_graph(EffectChain *graph, Node *self);
virtual bool set_float(const std::string &key, float value);
private:
+ void update_radius();
+
+ float radius;
SingleBlurPassEffect *hpass, *vpass;
+ unsigned input_width, input_height;
};
class SingleBlurPassEffect : public Effect {
public:
- SingleBlurPassEffect();
+ // If parent is non-NULL, calls to inform_input_size will be forwarded
+ // so that it can make reasonable decisions for both blur passes.
+ SingleBlurPassEffect(BlurEffect *parent);
+ virtual std::string effect_type_id() const { return "SingleBlurPassEffect"; }
+
std::string output_fragment_shader();
virtual bool needs_texture_bounce() const { return true; }
virtual bool needs_mipmaps() const { return true; }
+ virtual bool needs_srgb_primaries() const { return false; }
+ virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
+
+ virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height) {
+ if (parent != NULL) {
+ parent->inform_input_size(input_num, width, height);
+ }
+ }
+ virtual bool changes_output_size() const { return true; }
+
+ virtual void get_output_size(unsigned *width, unsigned *height, unsigned *virtual_width, unsigned *virtual_height) const {
+ *width = this->width;
+ *height = this->height;
+ *virtual_width = this->virtual_width;
+ *virtual_height = this->virtual_height;
+ }
- void set_uniforms(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
+ void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
+ void clear_gl_state();
enum Direction { HORIZONTAL = 0, VERTICAL = 1 };
private:
+ BlurEffect *parent;
float radius;
Direction direction;
+ int width, height, virtual_width, virtual_height;
};
-#endif // !defined(_BLUR_EFFECT_H)
+} // namespace movit
+
+#endif // !defined(_MOVIT_BLUR_EFFECT_H)