X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=effect_chain.h;h=e7d99d54821928c1248f6456c461ba1f63525eed;hp=02906fe0b9885b0263db412a16b3b4d0fd540031;hb=refs%2Fheads%2Fepoxy;hpb=5b6ab865efa692b25590f302c111b30680fbacdd

diff --git a/effect_chain.h b/effect_chain.h
index 02906fe..e7d99d5 100644
--- a/effect_chain.h
+++ b/effect_chain.h
@@ -66,11 +66,6 @@ private:
 	// they will be equal.
 	unsigned output_width, output_height;
 
-	// If output goes to RTT, which phase it is in (otherwise unset).
-	// This is a bit ugly; we should probably fix so that Phase takes other
-	// phases as inputs, instead of Node.
-	Phase *phase;
-
 	// If the effect has is_single_texture(), or if the output went to RTT
 	// and that texture has been bound to a sampler, the sampler number
 	// will be stored here.
@@ -90,19 +85,27 @@ private:
 
 // A rendering phase; a single GLSL program rendering a single quad.
 struct Phase {
+	Node *output_node;
+
 	GLuint glsl_program_num;  // Owned by the resource_pool.
 	bool input_needs_mipmaps;
 
 	// Inputs are only inputs from other phases (ie., those that come from RTT);
-	// input textures are not counted here.
-	std::vector<Node *> inputs;
-
+	// input textures are counted as part of <effects>.
+	std::vector<Phase *> inputs;
 	std::vector<Node *> effects;  // In order.
 	unsigned output_width, output_height, virtual_output_width, virtual_output_height;
 
 	// Identifier used to create unique variables in GLSL.
 	// Unique per-phase to increase cacheability of compiled shaders.
 	std::map<Node *, std::string> effect_ids;
+
+	// The geometry needed to draw this quad, bound to the vertex array
+	// object. (Seemingly it's actually a win not to upload geometry every
+	// frame, even for something as small as a quad, due to fewer state
+	// changes.)
+	GLuint vao;
+	GLuint position_vbo, texcoord_vbo;
 };
 
 class EffectChain {
@@ -224,13 +227,20 @@ private:
 	// output gamma different from GAMMA_LINEAR.
 	void find_all_nonlinear_inputs(Node *effect, std::vector<Node *> *nonlinear_inputs);
 
-	// Create a GLSL program computing the given effects in order.
-	Phase *compile_glsl_program(const std::vector<Node *> &inputs,
-	                            const std::vector<Node *> &effects);
+	// Create a GLSL program computing the effects for this phase in order.
+	void compile_glsl_program(Phase *phase);
 
 	// Create all GLSL programs needed to compute the given effect, and all outputs
-	// that depends on it (whenever possible).
-	void construct_glsl_programs(Node *output);
+	// that depend on it (whenever possible). Returns the phase that has <output>
+	// as the last effect. Also pushes all phases in order onto <phases>.
+	Phase *construct_phase(Node *output, std::map<Node *, Phase *> *completed_effects);
+
+	// Execute one phase, ie. set up all inputs, effects and outputs, and render the quad.
+	void execute_phase(Phase *phase, bool last_phase, std::map<Phase *, GLuint> *output_textures, std::set<Phase *> *generated_mipmaps);
+
+	// Set up the given sampler number for sampling from an RTT texture,
+	// and bind it to "tex_" plus the given GLSL variable.
+	void setup_rtt_sampler(GLuint glsl_program_num, int sampler_num, const std::string &effect_id, bool use_mipmaps);
 
 	// Output the current graph to the given file in a Graphviz-compatible format;
 	// only useful for debugging.