#include "effect.h"
#include "effect_id.h"
-enum PixelFormat { FORMAT_RGB, FORMAT_RGBA };
+enum PixelFormat { FORMAT_RGB, FORMAT_RGBA, FORMAT_BGR, FORMAT_BGRA };
enum ColorSpace {
COLORSPACE_sRGB = 0,
class EffectChain {
public:
EffectChain(unsigned width, unsigned height);
+
+ // User API:
+ // input, effects, output, finalize need to come in that specific order.
+
void add_input(const ImageFormat &format);
- // The pointer is owned by EffectChain.
- Effect *add_effect(EffectId effect);
+ // The returned pointer is owned by EffectChain.
+ Effect *add_effect(EffectId effect) {
+ return add_effect(effect, get_last_added_effect());
+ }
+ Effect *add_effect(EffectId effect, Effect *input) {
+ std::vector<Effect *> inputs;
+ inputs.push_back(input);
+ return add_effect(effect, inputs);
+ }
+ Effect *add_effect(EffectId effect, Effect *input1, Effect *input2) {
+ std::vector<Effect *> inputs;
+ inputs.push_back(input1);
+ inputs.push_back(input2);
+ return add_effect(effect, inputs);
+ }
+ Effect *add_effect(EffectId effect, const std::vector<Effect *> &inputs);
+
+ // Similar to add_effect, but:
+ //
+ // * Does not insert any normalizing effects.
+ // * Does not ask the effect to insert itself, so it won't work
+ // with meta-effects.
+ //
+ // We should really separate out these two “sides” of Effect in the
+ // type system soon.
+ void add_effect_raw(Effect *effect, const std::vector<Effect *> &inputs);
void add_output(const ImageFormat &format);
+ void finalize();
- void render(unsigned char *src, unsigned char *dst);
+ //void render(unsigned char *src, unsigned char *dst);
+ void render_to_screen(unsigned char *src);
+
+ Effect *get_last_added_effect() {
+ return last_added_effect;
+ }
private:
+ struct Phase {
+ GLint glsl_program_num;
+ bool input_needs_mipmaps;
+ unsigned start, end;
+ };
+
+ Effect *normalize_to_linear_gamma(Effect *input);
+ Effect *normalize_to_srgb(Effect *input);
+
+ // Create a GLSL program computing effects [start, end>.
+ Phase compile_glsl_program(unsigned start_index, unsigned end_index);
+
unsigned width, height;
ImageFormat input_format, output_format;
std::vector<Effect *> effects;
+ std::multimap<Effect *, Effect *> outgoing_links;
+ std::multimap<Effect *, Effect *> incoming_links;
+ Effect *last_added_effect;
+
+ GLuint source_image_num;
+ bool use_srgb_texture_format;
+
+ GLuint fbo;
+ GLuint temp_textures[2];
+
+ std::vector<Phase> phases;
+
+ GLenum format, bytes_per_pixel;
+ bool finalized;
- ColorSpace current_color_space;
- GammaCurve current_gamma_curve;
+ // Used during the building of the effect chain.
+ std::map<Effect *, ColorSpace> output_color_space;
+ std::map<Effect *, GammaCurve> output_gamma_curve;
};