#include <assert.h>
-#include "opengl.h"
+#include <Eigen/Core>
+
+#include <GL/glew.h>
+#include "util.h"
class EffectChain;
+class Node;
// Can alias on a float[2].
struct Point2D {
GLint get_uniform_location(GLuint glsl_program_num, const std::string &prefix, const std::string &key);
void set_uniform_int(GLuint glsl_program_num, const std::string &prefix, const std::string &key, int value);
void set_uniform_float(GLuint glsl_program_num, const std::string &prefix, const std::string &key, float value);
-void set_uniform_float_array(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values, size_t num_values);
void set_uniform_vec2(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values);
void set_uniform_vec3(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values);
void set_uniform_vec4_array(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values, size_t num_values);
+void set_uniform_mat3(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const Eigen::Matrix3d &matrix);
class Effect {
public:
+ virtual ~Effect() {}
+
// An identifier for this type of effect, mostly used for debug output
- // (but some special names, like "ColorSpaceConversionEffect", holds special
+ // (but some special names, like "ColorspaceConversionEffect", holds special
// meaning). Same as the class name is fine.
virtual std::string effect_type_id() const = 0;
// 2. You rely on previous effects, possibly including gamma
// expansion, to happen pre-filtering instead of post-filtering.
// (This is only relevant if you actually need the filtering; if
- // you sample on whole input pixels only, it makes no difference.)
+ // you sample 1:1 between pixels and texels, it makes no difference.)
//
// Note that in some cases, you might get post-filtered gamma expansion
// even when setting this option. More specifically, if you are the
virtual bool needs_mipmaps() const { return false; }
// Whether this effect wants to output to a different size than
- // its input(s). If you set this to true, the output will be
- // bounced to a texture (similarly to if the next effect set
- // needs_texture_bounce()).
+ // its input(s) (see inform_input_size(), below). If you set this to
+ // true, the output will be bounced to a texture (similarly to if the
+ // next effect set needs_texture_bounce()).
virtual bool changes_output_size() const { return false; }
// If changes_output_size() is true, you must implement this to tell
assert(false);
}
+ // Tells the effect the resolution of each of its input.
+ // This will be called every frame, and always before get_output_size(),
+ // so you can change your output size based on the input if so desired.
+ //
+ // Note that in some cases, an input might not have a single well-defined
+ // resolution (for instance if you fade between two inputs with
+ // different resolutions). In this case, you will get width=0 and height=0
+ // for that input. If you cannot handle that, you will need to set
+ // needs_texture_bounce() to true, which will force a render to a single
+ // given resolution before you get the input.
+ virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height) {}
+
// How many inputs this effect will take (a fixed number).
// If you have only one input, it will be called INPUT() in GLSL;
// if you have several, they will be INPUT1(), INPUT2(), and so on.
virtual unsigned num_inputs() const { return 1; }
- // Requests that this effect adds itself to the given effect chain.
- // For most effects, the default will be fine, but for effects that
- // consist of multiple passes, it is often useful to replace this
- // with something that adds completely different things to the chain.
- virtual void add_self_to_effect_chain(EffectChain *graph, const std::vector<Effect *> &inputs);
+ // Let the effect rewrite the effect chain as it sees fit.
+ // Most effects won't need to do this, but this is very useful
+ // if you have an effect that consists of multiple sub-effects
+ // (for instance, two passes). The effect is given to its own
+ // pointer, and it can add new ones (by using add_node()
+ // and connect_node()) as it sees fit. This is called at
+ // EffectChain::finalize() time, when the entire graph is known,
+ // in the order that the effects were originally added.
+ //
+ // Note that if the effect wants to take itself entirely out
+ // of the chain, it must set “disabled” to true and then disconnect
+ // itself from all other effects.
+ virtual void rewrite_graph(EffectChain *graph, Node *self) {}
// Outputs one GLSL uniform declaration for each registered parameter
// (see below), with the right prefix prepended to each uniform name.
// Set a parameter; intended to be called from user code.
// Neither of these take ownership of the pointer.
- virtual bool set_int(const std::string&, int value);
- virtual bool set_float(const std::string &key, float value);
- virtual bool set_vec2(const std::string &key, const float *values);
- virtual bool set_vec3(const std::string &key, const float *values);
+ virtual bool set_int(const std::string&, int value) MUST_CHECK_RESULT;
+ virtual bool set_float(const std::string &key, float value) MUST_CHECK_RESULT;
+ virtual bool set_vec2(const std::string &key, const float *values) MUST_CHECK_RESULT;
+ virtual bool set_vec3(const std::string &key, const float *values) MUST_CHECK_RESULT;
protected:
// Register a parameter. Whenever set_*() is called with the same key,
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