Prepare for a more DAG-like effect graph. Does not actually do anything differently...

[movit] / effect_chain.h

diff --git a/effect_chain.h b/effect_chain.h
index c8fe11e639ed36c52b10724f72cab87af01a1540..a22e96ad98629bc5e4980836b2eb563bd266a8e0 100644 (file)
--- a/effect_chain.h
+++ b/effect_chain.h
@@ -6,7 +6,7 @@
 #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,
@@ -31,20 +31,70 @@ struct ImageFormat {
 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);
+
+       // 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, Effect *input);
 
        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;
 
+       // Used during the building of the effect chain.
        ColorSpace current_color_space;
        GammaCurve current_gamma_curve; 
 };