#define GL_GLEXT_PROTOTYPES 1
+#include <GL/glew.h>
+#include <assert.h>
+#include <locale.h>
+#include <math.h>
+#include <stddef.h>
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
-#include <assert.h>
-
#include <algorithm>
#include <set>
#include <stack>
+#include <utility>
#include <vector>
-#include "util.h"
+#include "alpha_division_effect.h"
+#include "alpha_multiplication_effect.h"
+#include "colorspace_conversion_effect.h"
+#include "dither_effect.h"
+#include "effect.h"
#include "effect_chain.h"
-#include "gamma_expansion_effect.h"
#include "gamma_compression_effect.h"
-#include "colorspace_conversion_effect.h"
+#include "gamma_expansion_effect.h"
+#include "init.h"
#include "input.h"
-#include "opengl.h"
+#include "resource_pool.h"
+#include "util.h"
-EffectChain::EffectChain(unsigned width, unsigned height)
- : width(width),
- height(height),
- finalized(false) {}
+using namespace std;
-Input *EffectChain::add_input(Input *input)
+namespace movit {
+
+EffectChain::EffectChain(float aspect_nom, float aspect_denom, ResourcePool *resource_pool)
+ : aspect_nom(aspect_nom),
+ aspect_denom(aspect_denom),
+ dither_effect(NULL),
+ num_dither_bits(0),
+ finalized(false),
+ resource_pool(resource_pool) {
+ if (resource_pool == NULL) {
+ this->resource_pool = new ResourcePool();
+ owns_resource_pool = true;
+ } else {
+ owns_resource_pool = false;
+ }
+}
+
+EffectChain::~EffectChain()
{
- char eff_id[256];
- sprintf(eff_id, "src_image%u", (unsigned)inputs.size());
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ delete nodes[i]->effect;
+ delete nodes[i];
+ }
+ for (unsigned i = 0; i < phases.size(); ++i) {
+ glBindVertexArray(phases[i]->vao);
+ check_error();
- inputs.push_back(input);
+ cleanup_vertex_attribute(phases[i]->glsl_program_num, "position", phases[i]->position_vbo);
+ cleanup_vertex_attribute(phases[i]->glsl_program_num, "texcoord", phases[i]->texcoord_vbo);
- Node *node = new Node;
- node->effect = input;
- node->effect_id = eff_id;
- node->output_color_space = input->get_color_space();
- node->output_gamma_curve = input->get_gamma_curve();
+ glBindVertexArray(0);
+ check_error();
- nodes.push_back(node);
- node_map[input] = node;
+ resource_pool->release_glsl_program(phases[i]->glsl_program_num);
+ delete phases[i];
+ }
+ if (owns_resource_pool) {
+ delete resource_pool;
+ }
+ for (map<void *, GLuint>::const_iterator fbo_it = fbos.begin();
+ fbo_it != fbos.end(); ++fbo_it) {
+ glDeleteFramebuffers(1, &fbo_it->second);
+ check_error();
+ }
+}
+Input *EffectChain::add_input(Input *input)
+{
+ assert(!finalized);
+ inputs.push_back(input);
+ add_node(input);
return input;
}
-void EffectChain::add_output(const ImageFormat &format)
+void EffectChain::add_output(const ImageFormat &format, OutputAlphaFormat alpha_format)
{
+ assert(!finalized);
output_format = format;
+ output_alpha_format = alpha_format;
}
-void EffectChain::add_effect_raw(Effect *effect, const std::vector<Effect *> &inputs)
+Node *EffectChain::add_node(Effect *effect)
{
- char effect_id[256];
- sprintf(effect_id, "eff%u", (unsigned)nodes.size());
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ assert(nodes[i]->effect != effect);
+ }
Node *node = new Node;
node->effect = effect;
- node->effect_id = effect_id;
-
- assert(inputs.size() == effect->num_inputs());
- assert(inputs.size() >= 1);
- for (unsigned i = 0; i < inputs.size(); ++i) {
- assert(node_map.count(inputs[i]) != 0);
- node_map[inputs[i]]->outgoing_links.push_back(node);
- node->incoming_links.push_back(node_map[inputs[i]]);
- if (i == 0) {
- node->output_gamma_curve = node_map[inputs[i]]->output_gamma_curve;
- node->output_color_space = node_map[inputs[i]]->output_color_space;
- } else {
- assert(node->output_gamma_curve == node_map[inputs[i]]->output_gamma_curve);
- assert(node->output_color_space == node_map[inputs[i]]->output_color_space);
- }
- }
+ node->disabled = false;
+ node->output_color_space = COLORSPACE_INVALID;
+ node->output_gamma_curve = GAMMA_INVALID;
+ node->output_alpha_type = ALPHA_INVALID;
nodes.push_back(node);
node_map[effect] = node;
+ effect->inform_added(this);
+ return node;
}
-void EffectChain::find_all_nonlinear_inputs(Node *node,
- std::vector<Node *> *nonlinear_inputs,
- std::vector<Node *> *intermediates)
+void EffectChain::connect_nodes(Node *sender, Node *receiver)
{
- if (node->output_gamma_curve == GAMMA_LINEAR) {
- return;
- }
- if (node->effect->num_inputs() == 0) {
- nonlinear_inputs->push_back(node);
- } else {
- intermediates->push_back(node);
- assert(node->effect->num_inputs() == node->incoming_links.size());
- for (unsigned i = 0; i < node->incoming_links.size(); ++i) {
- find_all_nonlinear_inputs(node->incoming_links[i], nonlinear_inputs, intermediates);
- }
- }
+ sender->outgoing_links.push_back(receiver);
+ receiver->incoming_links.push_back(sender);
}
-Node *EffectChain::normalize_to_linear_gamma(Node *input)
+void EffectChain::replace_receiver(Node *old_receiver, Node *new_receiver)
{
- // Find out if all the inputs can be set to deliver sRGB inputs.
- // If so, we can just ask them to do that instead of inserting a
- // (possibly expensive) conversion operation.
- //
- // NOTE: We assume that effects generally don't mess with the gamma
- // curve (except GammaCompressionEffect, which should never be
- // inserted into a chain when this is called), so that we can just
- // update the output gamma as we go.
- //
- // TODO: Setting this flag for one source might confuse a different
- // part of the pipeline using the same source.
- std::vector<Node *> nonlinear_inputs;
- std::vector<Node *> intermediates;
- find_all_nonlinear_inputs(input, &nonlinear_inputs, &intermediates);
+ new_receiver->incoming_links = old_receiver->incoming_links;
+ old_receiver->incoming_links.clear();
+
+ for (unsigned i = 0; i < new_receiver->incoming_links.size(); ++i) {
+ Node *sender = new_receiver->incoming_links[i];
+ for (unsigned j = 0; j < sender->outgoing_links.size(); ++j) {
+ if (sender->outgoing_links[j] == old_receiver) {
+ sender->outgoing_links[j] = new_receiver;
+ }
+ }
+ }
+}
- bool all_ok = true;
- for (unsigned i = 0; i < nonlinear_inputs.size(); ++i) {
- Input *input = static_cast<Input *>(nonlinear_inputs[i]->effect);
- all_ok &= input->can_output_linear_gamma();
- }
+void EffectChain::replace_sender(Node *old_sender, Node *new_sender)
+{
+ new_sender->outgoing_links = old_sender->outgoing_links;
+ old_sender->outgoing_links.clear();
+
+ for (unsigned i = 0; i < new_sender->outgoing_links.size(); ++i) {
+ Node *receiver = new_sender->outgoing_links[i];
+ for (unsigned j = 0; j < receiver->incoming_links.size(); ++j) {
+ if (receiver->incoming_links[j] == old_sender) {
+ receiver->incoming_links[j] = new_sender;
+ }
+ }
+ }
+}
- if (all_ok) {
- for (unsigned i = 0; i < nonlinear_inputs.size(); ++i) {
- bool ok = nonlinear_inputs[i]->effect->set_int("output_linear_gamma", 1);
- assert(ok);
- nonlinear_inputs[i]->output_gamma_curve = GAMMA_LINEAR;
+void EffectChain::insert_node_between(Node *sender, Node *middle, Node *receiver)
+{
+ for (unsigned i = 0; i < sender->outgoing_links.size(); ++i) {
+ if (sender->outgoing_links[i] == receiver) {
+ sender->outgoing_links[i] = middle;
+ middle->incoming_links.push_back(sender);
}
- for (unsigned i = 0; i < intermediates.size(); ++i) {
- intermediates[i]->output_gamma_curve = GAMMA_LINEAR;
+ }
+ for (unsigned i = 0; i < receiver->incoming_links.size(); ++i) {
+ if (receiver->incoming_links[i] == sender) {
+ receiver->incoming_links[i] = middle;
+ middle->outgoing_links.push_back(receiver);
}
- return input;
}
- // OK, that didn't work. Insert a conversion effect.
- GammaExpansionEffect *gamma_conversion = new GammaExpansionEffect();
- gamma_conversion->set_int("source_curve", input->output_gamma_curve);
- std::vector<Effect *> inputs;
- inputs.push_back(input->effect);
- gamma_conversion->add_self_to_effect_chain(this, inputs);
-
- assert(node_map.count(gamma_conversion) != 0);
- Node *node = node_map[gamma_conversion];
- node->output_gamma_curve = GAMMA_LINEAR;
- return node;
+ assert(middle->incoming_links.size() == middle->effect->num_inputs());
}
-Node *EffectChain::normalize_to_srgb(Node *input)
+GLenum EffectChain::get_input_sampler(Node *node, unsigned input_num) const
{
- assert(input->output_gamma_curve == GAMMA_LINEAR);
- ColorSpaceConversionEffect *colorspace_conversion = new ColorSpaceConversionEffect();
- colorspace_conversion->set_int("source_space", input->output_color_space);
- colorspace_conversion->set_int("destination_space", COLORSPACE_sRGB);
- std::vector<Effect *> inputs;
- inputs.push_back(input->effect);
- colorspace_conversion->add_self_to_effect_chain(this, inputs);
-
- assert(node_map.count(colorspace_conversion) != 0);
- Node *node = node_map[colorspace_conversion];
- node->output_color_space = COLORSPACE_sRGB;
- return node;
+ assert(node->effect->needs_texture_bounce());
+ assert(input_num < node->incoming_links.size());
+ assert(node->incoming_links[input_num]->bound_sampler_num >= 0);
+ assert(node->incoming_links[input_num]->bound_sampler_num < 8);
+ return GL_TEXTURE0 + node->incoming_links[input_num]->bound_sampler_num;
}
-Effect *EffectChain::add_effect(Effect *effect, const std::vector<Effect *> &inputs)
+void EffectChain::find_all_nonlinear_inputs(Node *node, vector<Node *> *nonlinear_inputs)
{
- assert(inputs.size() == effect->num_inputs());
-
- std::vector<Effect *> normalized_inputs = inputs;
- for (unsigned i = 0; i < normalized_inputs.size(); ++i) {
- assert(node_map.count(normalized_inputs[i]) != 0);
- Node *input = node_map[normalized_inputs[i]];
- if (effect->needs_linear_light() && input->output_gamma_curve != GAMMA_LINEAR) {
- input = normalize_to_linear_gamma(input);
- }
- if (effect->needs_srgb_primaries() && input->output_color_space != COLORSPACE_sRGB) {
- input = normalize_to_srgb(input);
+ if (node->output_gamma_curve == GAMMA_LINEAR &&
+ node->effect->effect_type_id() != "GammaCompressionEffect") {
+ return;
+ }
+ if (node->effect->num_inputs() == 0) {
+ nonlinear_inputs->push_back(node);
+ } else {
+ assert(node->effect->num_inputs() == node->incoming_links.size());
+ for (unsigned i = 0; i < node->incoming_links.size(); ++i) {
+ find_all_nonlinear_inputs(node->incoming_links[i], nonlinear_inputs);
}
- normalized_inputs[i] = input->effect;
}
+}
- effect->add_self_to_effect_chain(this, normalized_inputs);
+Effect *EffectChain::add_effect(Effect *effect, const vector<Effect *> &inputs)
+{
+ assert(!finalized);
+ assert(inputs.size() == effect->num_inputs());
+ Node *node = add_node(effect);
+ for (unsigned i = 0; i < inputs.size(); ++i) {
+ assert(node_map.count(inputs[i]) != 0);
+ connect_nodes(node_map[inputs[i]], node);
+ }
return effect;
}
// GLSL pre-1.30 doesn't support token pasting. Replace PREFIX(x) with <effect_id>_x.
-std::string replace_prefix(const std::string &text, const std::string &prefix)
+string replace_prefix(const string &text, const string &prefix)
{
- std::string output;
+ string output;
size_t start = 0;
while (start < text.size()) {
size_t pos = text.find("PREFIX(", start);
- if (pos == std::string::npos) {
- output.append(text.substr(start, std::string::npos));
+ if (pos == string::npos) {
+ output.append(text.substr(start, string::npos));
break;
}
return output;
}
-Phase *EffectChain::compile_glsl_program(
- const std::vector<Node *> &inputs,
- const std::vector<Node *> &effects)
+void EffectChain::compile_glsl_program(Phase *phase)
{
- assert(!effects.empty());
-
- // Deduplicate the inputs.
- std::vector<Node *> true_inputs = inputs;
- std::sort(true_inputs.begin(), true_inputs.end());
- true_inputs.erase(std::unique(true_inputs.begin(), true_inputs.end()), true_inputs.end());
-
- bool input_needs_mipmaps = false;
- std::string frag_shader = read_file("header.frag");
+ string frag_shader = read_file("header.frag");
// Create functions for all the texture inputs that we need.
- for (unsigned i = 0; i < true_inputs.size(); ++i) {
- Node *input = true_inputs[i];
+ for (unsigned i = 0; i < phase->inputs.size(); ++i) {
+ Node *input = phase->inputs[i]->output_node;
+ char effect_id[256];
+ sprintf(effect_id, "in%u", i);
+ phase->effect_ids.insert(make_pair(input, effect_id));
- frag_shader += std::string("uniform sampler2D tex_") + input->effect_id + ";\n";
- frag_shader += std::string("vec4 ") + input->effect_id + "(vec2 tc) {\n";
- frag_shader += "\treturn texture2D(tex_" + input->effect_id + ", tc);\n";
+ frag_shader += string("uniform sampler2D tex_") + effect_id + ";\n";
+ frag_shader += string("vec4 ") + effect_id + "(vec2 tc) {\n";
+ frag_shader += "\treturn texture2D(tex_" + string(effect_id) + ", tc);\n";
frag_shader += "}\n";
frag_shader += "\n";
}
- for (unsigned i = 0; i < effects.size(); ++i) {
- Node *node = effects[i];
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Node *node = phase->effects[i];
+ char effect_id[256];
+ sprintf(effect_id, "eff%u", i);
+ phase->effect_ids.insert(make_pair(node, effect_id));
if (node->incoming_links.size() == 1) {
- frag_shader += std::string("#define INPUT ") + node->incoming_links[0]->effect_id + "\n";
+ frag_shader += string("#define INPUT ") + phase->effect_ids[node->incoming_links[0]] + "\n";
} else {
for (unsigned j = 0; j < node->incoming_links.size(); ++j) {
char buf[256];
- sprintf(buf, "#define INPUT%d %s\n", j + 1, node->incoming_links[j]->effect_id.c_str());
+ sprintf(buf, "#define INPUT%d %s\n", j + 1, phase->effect_ids[node->incoming_links[j]].c_str());
frag_shader += buf;
}
}
frag_shader += "\n";
- frag_shader += std::string("#define FUNCNAME ") + node->effect_id + "\n";
- frag_shader += replace_prefix(node->effect->output_convenience_uniforms(), node->effect_id);
- frag_shader += replace_prefix(node->effect->output_fragment_shader(), node->effect_id);
+ frag_shader += string("#define FUNCNAME ") + effect_id + "\n";
+ frag_shader += replace_prefix(node->effect->output_convenience_uniforms(), effect_id);
+ frag_shader += replace_prefix(node->effect->output_fragment_shader(), effect_id);
frag_shader += "#undef PREFIX\n";
frag_shader += "#undef FUNCNAME\n";
if (node->incoming_links.size() == 1) {
}
}
frag_shader += "\n";
-
- input_needs_mipmaps |= node->effect->needs_mipmaps();
- }
- for (unsigned i = 0; i < effects.size(); ++i) {
- Node *node = effects[i];
- if (node->effect->num_inputs() == 0) {
- node->effect->set_int("needs_mipmaps", input_needs_mipmaps);
- }
}
- frag_shader += std::string("#define INPUT ") + effects.back()->effect_id + "\n";
+ frag_shader += string("#define INPUT ") + phase->effect_ids[phase->effects.back()] + "\n";
frag_shader.append(read_file("footer.frag"));
- printf("%s\n", frag_shader.c_str());
-
- GLuint glsl_program_num = glCreateProgram();
- GLuint vs_obj = compile_shader(read_file("vs.vert"), GL_VERTEX_SHADER);
- GLuint fs_obj = compile_shader(frag_shader, GL_FRAGMENT_SHADER);
- glAttachShader(glsl_program_num, vs_obj);
- check_error();
- glAttachShader(glsl_program_num, fs_obj);
+
+ phase->glsl_program_num = resource_pool->compile_glsl_program(read_file("vs.vert"), frag_shader);
+
+ // Prepare the geometry for the fullscreen quad used in this phase.
+ // (We have separate VAOs per shader, since the bindings can in theory
+ // be different.)
+ float vertices[] = {
+ 0.0f, 1.0f,
+ 0.0f, 0.0f,
+ 1.0f, 1.0f,
+ 1.0f, 0.0f
+ };
+
+ glGenVertexArrays(1, &phase->vao);
check_error();
- glLinkProgram(glsl_program_num);
+ glBindVertexArray(phase->vao);
check_error();
- Phase *phase = new Phase;
- phase->glsl_program_num = glsl_program_num;
- phase->input_needs_mipmaps = input_needs_mipmaps;
- phase->inputs = true_inputs;
- phase->effects = effects;
+ phase->position_vbo = fill_vertex_attribute(phase->glsl_program_num, "position", 2, GL_FLOAT, sizeof(vertices), vertices);
+ phase->texcoord_vbo = fill_vertex_attribute(phase->glsl_program_num, "texcoord", 2, GL_FLOAT, sizeof(vertices), vertices); // Same as vertices.
- return phase;
+ glBindVertexArray(0);
+ check_error();
}
// Construct GLSL programs, starting at the given effect and following
// and of course at the end.
//
// We follow a quite simple depth-first search from the output, although
-// without any explicit recursion.
-void EffectChain::construct_glsl_programs(Node *output)
+// without recursing explicitly within each phase.
+Phase *EffectChain::construct_phase(Node *output, map<Node *, Phase *> *completed_effects)
{
- // Which effects have already been completed in this phase?
- // We need to keep track of it, as an effect with multiple outputs
- // could otherwise be calculate multiple times.
- std::set<Node *> completed_effects;
+ if (completed_effects->count(output)) {
+ return (*completed_effects)[output];
+ }
- // Effects in the current phase, as well as inputs (outputs from other phases
- // that we depend on). Note that since we start iterating from the end,
- // the effect list will be in the reverse order.
- std::vector<Node *> this_phase_inputs;
- std::vector<Node *> this_phase_effects;
+ Phase *phase = new Phase;
+ phase->output_node = output;
// Effects that we have yet to calculate, but that we know should
// be in the current phase.
- std::stack<Node *> effects_todo_this_phase;
-
- // Effects that we have yet to calculate, but that come from other phases.
- // We delay these until we have this phase done in its entirety,
- // at which point we pick any of them and start a new phase from that.
- std::stack<Node *> effects_todo_other_phases;
-
+ stack<Node *> effects_todo_this_phase;
effects_todo_this_phase.push(output);
- for ( ;; ) { // Termination condition within loop.
- if (!effects_todo_this_phase.empty()) {
- // OK, we have more to do this phase.
- Node *node = effects_todo_this_phase.top();
- effects_todo_this_phase.pop();
+ while (!effects_todo_this_phase.empty()) {
+ Node *node = effects_todo_this_phase.top();
+ effects_todo_this_phase.pop();
- // This should currently only happen for effects that are phase outputs,
- // and we throw those out separately below.
- assert(completed_effects.count(node) == 0);
+ // This should currently only happen for effects that are inputs
+ // (either true inputs or phase outputs). We special-case inputs,
+ // and then deduplicate phase outputs below.
+ if (node->effect->num_inputs() == 0) {
+ if (find(phase->effects.begin(), phase->effects.end(), node) != phase->effects.end()) {
+ continue;
+ }
+ } else {
+ assert(completed_effects->count(node) == 0);
+ }
- this_phase_effects.push_back(node);
- completed_effects.insert(node);
+ phase->effects.push_back(node);
- // Find all the dependencies of this effect, and add them to the stack.
- std::vector<Node *> deps = node->incoming_links;
- assert(node->effect->num_inputs() == deps.size());
- for (unsigned i = 0; i < deps.size(); ++i) {
- bool start_new_phase = false;
+ // Find all the dependencies of this effect, and add them to the stack.
+ vector<Node *> deps = node->incoming_links;
+ assert(node->effect->num_inputs() == deps.size());
+ for (unsigned i = 0; i < deps.size(); ++i) {
+ bool start_new_phase = false;
- // FIXME: If we sample directly from a texture, we won't need this.
- if (node->effect->needs_texture_bounce()) {
- start_new_phase = true;
- }
+ if (node->effect->needs_texture_bounce() &&
+ !deps[i]->effect->is_single_texture()) {
+ start_new_phase = true;
+ }
- if (deps[i]->outgoing_links.size() > 1 && deps[i]->effect->num_inputs() > 0) {
+ if (deps[i]->outgoing_links.size() > 1) {
+ if (!deps[i]->effect->is_single_texture()) {
// More than one effect uses this as the input,
// and it is not a texture itself.
// The easiest thing to do (and probably also the safest
// performance-wise in most cases) is to bounce it to a texture
// and then let the next passes read from that.
start_new_phase = true;
+ } else {
+ assert(deps[i]->effect->num_inputs() == 0);
+
+ // For textures, we try to be slightly more clever;
+ // if none of our outputs need a bounce, we don't bounce
+ // but instead simply use the effect many times.
+ //
+ // Strictly speaking, we could bounce it for some outputs
+ // and use it directly for others, but the processing becomes
+ // somewhat simpler if the effect is only used in one such way.
+ for (unsigned j = 0; j < deps[i]->outgoing_links.size(); ++j) {
+ Node *rdep = deps[i]->outgoing_links[j];
+ start_new_phase |= rdep->effect->needs_texture_bounce();
+ }
}
+ }
- if (deps[i]->effect->changes_output_size()) {
- start_new_phase = true;
- }
+ if (deps[i]->effect->changes_output_size()) {
+ start_new_phase = true;
+ }
- if (start_new_phase) {
- effects_todo_other_phases.push(deps[i]);
- this_phase_inputs.push_back(deps[i]);
- } else {
- effects_todo_this_phase.push(deps[i]);
- }
+ if (start_new_phase) {
+ phase->inputs.push_back(construct_phase(deps[i], completed_effects));
+ } else {
+ effects_todo_this_phase.push(deps[i]);
}
- continue;
}
+ }
+
+ // No more effects to do this phase. Take all the ones we have,
+ // and create a GLSL program for it.
+ assert(!phase->effects.empty());
- // No more effects to do this phase. Take all the ones we have,
- // and create a GLSL program for it.
- if (!this_phase_effects.empty()) {
- reverse(this_phase_effects.begin(), this_phase_effects.end());
- phases.push_back(compile_glsl_program(this_phase_inputs, this_phase_effects));
- this_phase_effects.back()->phase = phases.back();
- this_phase_inputs.clear();
- this_phase_effects.clear();
+ // Deduplicate the inputs.
+ sort(phase->inputs.begin(), phase->inputs.end());
+ phase->inputs.erase(unique(phase->inputs.begin(), phase->inputs.end()), phase->inputs.end());
+
+ // We added the effects from the output and back, but we need to output
+ // them in topological sort order in the shader.
+ phase->effects = topological_sort(phase->effects);
+
+ // Figure out if we need mipmaps or not, and if so, tell the inputs that.
+ phase->input_needs_mipmaps = false;
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Node *node = phase->effects[i];
+ phase->input_needs_mipmaps |= node->effect->needs_mipmaps();
+ }
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Node *node = phase->effects[i];
+ if (node->effect->num_inputs() == 0) {
+ CHECK(node->effect->set_int("needs_mipmaps", phase->input_needs_mipmaps));
}
- assert(this_phase_inputs.empty());
- assert(this_phase_effects.empty());
+ }
- // If we have no effects left, exit.
- if (effects_todo_other_phases.empty()) {
- break;
+ // Actually make the shader for this phase.
+ compile_glsl_program(phase);
+
+ assert(completed_effects->count(output) == 0);
+ completed_effects->insert(make_pair(output, phase));
+ phases.push_back(phase);
+ return phase;
+}
+
+void EffectChain::output_dot(const char *filename)
+{
+ if (movit_debug_level != MOVIT_DEBUG_ON) {
+ return;
+ }
+
+ FILE *fp = fopen(filename, "w");
+ if (fp == NULL) {
+ perror(filename);
+ exit(1);
+ }
+
+ fprintf(fp, "digraph G {\n");
+ fprintf(fp, " output [shape=box label=\"(output)\"];\n");
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ // Find out which phase this event belongs to.
+ vector<int> in_phases;
+ for (unsigned j = 0; j < phases.size(); ++j) {
+ const Phase* p = phases[j];
+ if (find(p->effects.begin(), p->effects.end(), nodes[i]) != p->effects.end()) {
+ in_phases.push_back(j);
+ }
+ }
+
+ if (in_phases.empty()) {
+ fprintf(fp, " n%ld [label=\"%s\"];\n", (long)nodes[i], nodes[i]->effect->effect_type_id().c_str());
+ } else if (in_phases.size() == 1) {
+ fprintf(fp, " n%ld [label=\"%s\" style=\"filled\" fillcolor=\"/accent8/%d\"];\n",
+ (long)nodes[i], nodes[i]->effect->effect_type_id().c_str(),
+ (in_phases[0] % 8) + 1);
+ } else {
+ // If we had new enough Graphviz, style="wedged" would probably be ideal here.
+ // But alas.
+ fprintf(fp, " n%ld [label=\"%s [in multiple phases]\" style=\"filled\" fillcolor=\"/accent8/%d\"];\n",
+ (long)nodes[i], nodes[i]->effect->effect_type_id().c_str(),
+ (in_phases[0] % 8) + 1);
}
- Node *node = effects_todo_other_phases.top();
- effects_todo_other_phases.pop();
+ char from_node_id[256];
+ snprintf(from_node_id, 256, "n%ld", (long)nodes[i]);
+
+ for (unsigned j = 0; j < nodes[i]->outgoing_links.size(); ++j) {
+ char to_node_id[256];
+ snprintf(to_node_id, 256, "n%ld", (long)nodes[i]->outgoing_links[j]);
+
+ vector<string> labels = get_labels_for_edge(nodes[i], nodes[i]->outgoing_links[j]);
+ output_dot_edge(fp, from_node_id, to_node_id, labels);
+ }
+
+ if (nodes[i]->outgoing_links.empty() && !nodes[i]->disabled) {
+ // Output node.
+ vector<string> labels = get_labels_for_edge(nodes[i], NULL);
+ output_dot_edge(fp, from_node_id, "output", labels);
+ }
+ }
+ fprintf(fp, "}\n");
+
+ fclose(fp);
+}
+
+vector<string> EffectChain::get_labels_for_edge(const Node *from, const Node *to)
+{
+ vector<string> labels;
+
+ if (to != NULL && to->effect->needs_texture_bounce()) {
+ labels.push_back("needs_bounce");
+ }
+ if (from->effect->changes_output_size()) {
+ labels.push_back("resize");
+ }
+
+ switch (from->output_color_space) {
+ case COLORSPACE_INVALID:
+ labels.push_back("spc[invalid]");
+ break;
+ case COLORSPACE_REC_601_525:
+ labels.push_back("spc[rec601-525]");
+ break;
+ case COLORSPACE_REC_601_625:
+ labels.push_back("spc[rec601-625]");
+ break;
+ default:
+ break;
+ }
+
+ switch (from->output_gamma_curve) {
+ case GAMMA_INVALID:
+ labels.push_back("gamma[invalid]");
+ break;
+ case GAMMA_sRGB:
+ labels.push_back("gamma[sRGB]");
+ break;
+ case GAMMA_REC_601: // and GAMMA_REC_709
+ labels.push_back("gamma[rec601/709]");
+ break;
+ default:
+ break;
+ }
+
+ switch (from->output_alpha_type) {
+ case ALPHA_INVALID:
+ labels.push_back("alpha[invalid]");
+ break;
+ case ALPHA_BLANK:
+ labels.push_back("alpha[blank]");
+ break;
+ case ALPHA_POSTMULTIPLIED:
+ labels.push_back("alpha[postmult]");
+ break;
+ default:
+ break;
+ }
+
+ return labels;
+}
+
+void EffectChain::output_dot_edge(FILE *fp,
+ const string &from_node_id,
+ const string &to_node_id,
+ const vector<string> &labels)
+{
+ if (labels.empty()) {
+ fprintf(fp, " %s -> %s;\n", from_node_id.c_str(), to_node_id.c_str());
+ } else {
+ string label = labels[0];
+ for (unsigned k = 1; k < labels.size(); ++k) {
+ label += ", " + labels[k];
+ }
+ fprintf(fp, " %s -> %s [label=\"%s\"];\n", from_node_id.c_str(), to_node_id.c_str(), label.c_str());
+ }
+}
+
+void EffectChain::size_rectangle_to_fit(unsigned width, unsigned height, unsigned *output_width, unsigned *output_height)
+{
+ unsigned scaled_width, scaled_height;
+
+ if (float(width) * aspect_denom >= float(height) * aspect_nom) {
+ // Same aspect, or W/H > aspect (image is wider than the frame).
+ // In either case, keep width, and adjust height.
+ scaled_width = width;
+ scaled_height = lrintf(width * aspect_denom / aspect_nom);
+ } else {
+ // W/H < aspect (image is taller than the frame), so keep height,
+ // and adjust width.
+ scaled_width = lrintf(height * aspect_nom / aspect_denom);
+ scaled_height = height;
+ }
+
+ // We should be consistently larger or smaller then the existing choice,
+ // since we have the same aspect.
+ assert(!(scaled_width < *output_width && scaled_height > *output_height));
+ assert(!(scaled_height < *output_height && scaled_width > *output_width));
+
+ if (scaled_width >= *output_width && scaled_height >= *output_height) {
+ *output_width = scaled_width;
+ *output_height = scaled_height;
+ }
+}
- if (completed_effects.count(node) == 0) {
- // Start a new phase, calculating from this effect.
- effects_todo_this_phase.push(node);
+// Propagate input texture sizes throughout, and inform effects downstream.
+// (Like a lot of other code, we depend on effects being in topological order.)
+void EffectChain::inform_input_sizes(Phase *phase)
+{
+ // All effects that have a defined size (inputs and RTT inputs)
+ // get that. Reset all others.
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Node *node = phase->effects[i];
+ if (node->effect->num_inputs() == 0) {
+ Input *input = static_cast<Input *>(node->effect);
+ node->output_width = input->get_width();
+ node->output_height = input->get_height();
+ assert(node->output_width != 0);
+ assert(node->output_height != 0);
+ } else {
+ node->output_width = node->output_height = 0;
}
}
+ for (unsigned i = 0; i < phase->inputs.size(); ++i) {
+ Phase *input = phase->inputs[i];
+ input->output_node->output_width = input->virtual_output_width;
+ input->output_node->output_height = input->virtual_output_height;
+ assert(input->output_node->output_width != 0);
+ assert(input->output_node->output_height != 0);
+ }
- // Finally, since the phases are found from the output but must be executed
- // from the input(s), reverse them, too.
- std::reverse(phases.begin(), phases.end());
+ // Now propagate from the inputs towards the end, and inform as we go.
+ // The rules are simple:
+ //
+ // 1. Don't touch effects that already have given sizes (ie., inputs).
+ // 2. If all of your inputs have the same size, that will be your output size.
+ // 3. Otherwise, your output size is 0x0.
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Node *node = phase->effects[i];
+ if (node->effect->num_inputs() == 0) {
+ continue;
+ }
+ unsigned this_output_width = 0;
+ unsigned this_output_height = 0;
+ for (unsigned j = 0; j < node->incoming_links.size(); ++j) {
+ Node *input = node->incoming_links[j];
+ node->effect->inform_input_size(j, input->output_width, input->output_height);
+ if (j == 0) {
+ this_output_width = input->output_width;
+ this_output_height = input->output_height;
+ } else if (input->output_width != this_output_width || input->output_height != this_output_height) {
+ // Inputs disagree.
+ this_output_width = 0;
+ this_output_height = 0;
+ }
+ }
+ node->output_width = this_output_width;
+ node->output_height = this_output_height;
+ }
}
+// Note: You should call inform_input_sizes() before this, as the last effect's
+// desired output size might change based on the inputs.
void EffectChain::find_output_size(Phase *phase)
{
Node *output_node = phase->effects.back();
- // If the last effect explicitly sets an output size,
- // use that.
+ // If the last effect explicitly sets an output size, use that.
if (output_node->effect->changes_output_size()) {
- output_node->effect->get_output_size(&phase->output_width, &phase->output_height);
+ output_node->effect->get_output_size(&phase->output_width, &phase->output_height,
+ &phase->virtual_output_width, &phase->virtual_output_height);
return;
}
- // If not, look at the input phases, if any. We select the largest one
- // (really assuming they all have the same aspect currently), by pixel count.
- if (!phase->inputs.empty()) {
- unsigned best_width = 0, best_height = 0;
- for (unsigned i = 0; i < phase->inputs.size(); ++i) {
- Node *input = phase->inputs[i];
- assert(input->phase->output_width != 0);
- assert(input->phase->output_height != 0);
- if (input->phase->output_width * input->phase->output_height > best_width * best_height) {
- best_width = input->phase->output_width;
- best_height = input->phase->output_height;
- }
+ // If all effects have the same size, use that.
+ unsigned output_width = 0, output_height = 0;
+ bool all_inputs_same_size = true;
+
+ for (unsigned i = 0; i < phase->inputs.size(); ++i) {
+ Phase *input = phase->inputs[i];
+ assert(input->output_width != 0);
+ assert(input->output_height != 0);
+ if (output_width == 0 && output_height == 0) {
+ output_width = input->virtual_output_width;
+ output_height = input->virtual_output_height;
+ } else if (output_width != input->virtual_output_width ||
+ output_height != input->virtual_output_height) {
+ all_inputs_same_size = false;
+ }
+ }
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Effect *effect = phase->effects[i]->effect;
+ if (effect->num_inputs() != 0) {
+ continue;
+ }
+
+ Input *input = static_cast<Input *>(effect);
+ if (output_width == 0 && output_height == 0) {
+ output_width = input->get_width();
+ output_height = input->get_height();
+ } else if (output_width != input->get_width() ||
+ output_height != input->get_height()) {
+ all_inputs_same_size = false;
}
- assert(best_width != 0);
- assert(best_height != 0);
- phase->output_width = best_width;
- phase->output_height = best_height;
+ }
+
+ if (all_inputs_same_size) {
+ assert(output_width != 0);
+ assert(output_height != 0);
+ phase->virtual_output_width = phase->output_width = output_width;
+ phase->virtual_output_height = phase->output_height = output_height;
return;
}
- // OK, no inputs. Just use the global width/height.
- // TODO: We probably want to use the texture's size eventually.
- phase->output_width = width;
- phase->output_height = height;
+ // If not, fit all the inputs into the current aspect, and select the largest one.
+ output_width = 0;
+ output_height = 0;
+ for (unsigned i = 0; i < phase->inputs.size(); ++i) {
+ Phase *input = phase->inputs[i];
+ assert(input->output_width != 0);
+ assert(input->output_height != 0);
+ size_rectangle_to_fit(input->output_width, input->output_height, &output_width, &output_height);
+ }
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Effect *effect = phase->effects[i]->effect;
+ if (effect->num_inputs() != 0) {
+ continue;
+ }
+
+ Input *input = static_cast<Input *>(effect);
+ size_rectangle_to_fit(input->get_width(), input->get_height(), &output_width, &output_height);
+ }
+ assert(output_width != 0);
+ assert(output_height != 0);
+ phase->virtual_output_width = phase->output_width = output_width;
+ phase->virtual_output_height = phase->output_height = output_height;
}
-void EffectChain::finalize()
+void EffectChain::sort_all_nodes_topologically()
+{
+ nodes = topological_sort(nodes);
+}
+
+vector<Node *> EffectChain::topological_sort(const vector<Node *> &nodes)
+{
+ set<Node *> nodes_left_to_visit(nodes.begin(), nodes.end());
+ vector<Node *> sorted_list;
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ topological_sort_visit_node(nodes[i], &nodes_left_to_visit, &sorted_list);
+ }
+ reverse(sorted_list.begin(), sorted_list.end());
+ return sorted_list;
+}
+
+void EffectChain::topological_sort_visit_node(Node *node, set<Node *> *nodes_left_to_visit, vector<Node *> *sorted_list)
+{
+ if (nodes_left_to_visit->count(node) == 0) {
+ return;
+ }
+ nodes_left_to_visit->erase(node);
+ for (unsigned i = 0; i < node->outgoing_links.size(); ++i) {
+ topological_sort_visit_node(node->outgoing_links[i], nodes_left_to_visit, sorted_list);
+ }
+ sorted_list->push_back(node);
+}
+
+void EffectChain::find_color_spaces_for_inputs()
{
- // Find the output effect. This is, simply, one that has no outgoing links.
- // If there are multiple ones, the graph is malformed (we do not support
- // multiple outputs right now).
- std::vector<Node *> output_nodes;
for (unsigned i = 0; i < nodes.size(); ++i) {
Node *node = nodes[i];
- if (node->outgoing_links.empty()) {
- output_nodes.push_back(node);
+ if (node->disabled) {
+ continue;
+ }
+ if (node->incoming_links.size() == 0) {
+ Input *input = static_cast<Input *>(node->effect);
+ node->output_color_space = input->get_color_space();
+ node->output_gamma_curve = input->get_gamma_curve();
+
+ Effect::AlphaHandling alpha_handling = input->alpha_handling();
+ switch (alpha_handling) {
+ case Effect::OUTPUT_BLANK_ALPHA:
+ node->output_alpha_type = ALPHA_BLANK;
+ break;
+ case Effect::INPUT_AND_OUTPUT_PREMULTIPLIED_ALPHA:
+ node->output_alpha_type = ALPHA_PREMULTIPLIED;
+ break;
+ case Effect::OUTPUT_POSTMULTIPLIED_ALPHA:
+ node->output_alpha_type = ALPHA_POSTMULTIPLIED;
+ break;
+ case Effect::INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK:
+ case Effect::DONT_CARE_ALPHA_TYPE:
+ default:
+ assert(false);
+ }
+
+ if (node->output_alpha_type == ALPHA_PREMULTIPLIED) {
+ assert(node->output_gamma_curve == GAMMA_LINEAR);
+ }
}
}
- assert(output_nodes.size() == 1);
- Node *output_node = output_nodes[0];
+}
+
+// Propagate gamma and color space information as far as we can in the graph.
+// The rules are simple: Anything where all the inputs agree, get that as
+// output as well. Anything else keeps having *_INVALID.
+void EffectChain::propagate_gamma_and_color_space()
+{
+ // We depend on going through the nodes in order.
+ sort_all_nodes_topologically();
+
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (node->disabled) {
+ continue;
+ }
+ assert(node->incoming_links.size() == node->effect->num_inputs());
+ if (node->incoming_links.size() == 0) {
+ assert(node->output_color_space != COLORSPACE_INVALID);
+ assert(node->output_gamma_curve != GAMMA_INVALID);
+ continue;
+ }
- // Add normalizers to get the output format right.
- if (output_node->output_color_space != output_format.color_space) {
- ColorSpaceConversionEffect *colorspace_conversion = new ColorSpaceConversionEffect();
- colorspace_conversion->set_int("source_space", output_node->output_color_space);
- colorspace_conversion->set_int("destination_space", output_format.color_space);
- std::vector<Effect *> inputs;
- inputs.push_back(output_node->effect);
- colorspace_conversion->add_self_to_effect_chain(this, inputs);
+ Colorspace color_space = node->incoming_links[0]->output_color_space;
+ GammaCurve gamma_curve = node->incoming_links[0]->output_gamma_curve;
+ for (unsigned j = 1; j < node->incoming_links.size(); ++j) {
+ if (node->incoming_links[j]->output_color_space != color_space) {
+ color_space = COLORSPACE_INVALID;
+ }
+ if (node->incoming_links[j]->output_gamma_curve != gamma_curve) {
+ gamma_curve = GAMMA_INVALID;
+ }
+ }
- assert(node_map.count(colorspace_conversion) != 0);
- output_node = node_map[colorspace_conversion];
- output_node->output_color_space = output_format.color_space;
+ // The conversion effects already have their outputs set correctly,
+ // so leave them alone.
+ if (node->effect->effect_type_id() != "ColorspaceConversionEffect") {
+ node->output_color_space = color_space;
+ }
+ if (node->effect->effect_type_id() != "GammaCompressionEffect" &&
+ node->effect->effect_type_id() != "GammaExpansionEffect") {
+ node->output_gamma_curve = gamma_curve;
+ }
}
- if (output_node->output_gamma_curve != output_format.gamma_curve) {
- if (output_node->output_gamma_curve != GAMMA_LINEAR) {
- output_node = normalize_to_linear_gamma(output_node);
+}
+
+// Propagate alpha information as far as we can in the graph.
+// Similar to propagate_gamma_and_color_space().
+void EffectChain::propagate_alpha()
+{
+ // We depend on going through the nodes in order.
+ sort_all_nodes_topologically();
+
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (node->disabled) {
+ continue;
+ }
+ assert(node->incoming_links.size() == node->effect->num_inputs());
+ if (node->incoming_links.size() == 0) {
+ assert(node->output_alpha_type != ALPHA_INVALID);
+ continue;
+ }
+
+ // The alpha multiplication/division effects are special cases.
+ if (node->effect->effect_type_id() == "AlphaMultiplicationEffect") {
+ assert(node->incoming_links.size() == 1);
+ assert(node->incoming_links[0]->output_alpha_type == ALPHA_POSTMULTIPLIED);
+ node->output_alpha_type = ALPHA_PREMULTIPLIED;
+ continue;
+ }
+ if (node->effect->effect_type_id() == "AlphaDivisionEffect") {
+ assert(node->incoming_links.size() == 1);
+ assert(node->incoming_links[0]->output_alpha_type == ALPHA_PREMULTIPLIED);
+ node->output_alpha_type = ALPHA_POSTMULTIPLIED;
+ continue;
}
- GammaCompressionEffect *gamma_conversion = new GammaCompressionEffect();
- gamma_conversion->set_int("destination_curve", output_format.gamma_curve);
- std::vector<Effect *> inputs;
- inputs.push_back(output_node->effect);
- gamma_conversion->add_self_to_effect_chain(this, inputs);
- assert(node_map.count(gamma_conversion) != 0);
- output_node = node_map[gamma_conversion];
- output_node->output_gamma_curve = output_format.gamma_curve;
+ // GammaCompressionEffect and GammaExpansionEffect are also a special case,
+ // because they are the only one that _need_ postmultiplied alpha.
+ if (node->effect->effect_type_id() == "GammaCompressionEffect" ||
+ node->effect->effect_type_id() == "GammaExpansionEffect") {
+ assert(node->incoming_links.size() == 1);
+ if (node->incoming_links[0]->output_alpha_type == ALPHA_BLANK) {
+ node->output_alpha_type = ALPHA_BLANK;
+ } else if (node->incoming_links[0]->output_alpha_type == ALPHA_POSTMULTIPLIED) {
+ node->output_alpha_type = ALPHA_POSTMULTIPLIED;
+ } else {
+ node->output_alpha_type = ALPHA_INVALID;
+ }
+ continue;
+ }
+
+ // Only inputs can have unconditional alpha output (OUTPUT_BLANK_ALPHA
+ // or OUTPUT_POSTMULTIPLIED_ALPHA), and they have already been
+ // taken care of above. Rationale: Even if you could imagine
+ // e.g. an effect that took in an image and set alpha=1.0
+ // unconditionally, it wouldn't make any sense to have it as
+ // e.g. OUTPUT_BLANK_ALPHA, since it wouldn't know whether it
+ // got its input pre- or postmultiplied, so it wouldn't know
+ // whether to divide away the old alpha or not.
+ Effect::AlphaHandling alpha_handling = node->effect->alpha_handling();
+ assert(alpha_handling == Effect::INPUT_AND_OUTPUT_PREMULTIPLIED_ALPHA ||
+ alpha_handling == Effect::INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK ||
+ alpha_handling == Effect::DONT_CARE_ALPHA_TYPE);
+
+ // If the node has multiple inputs, check that they are all valid and
+ // the same.
+ bool any_invalid = false;
+ bool any_premultiplied = false;
+ bool any_postmultiplied = false;
+
+ for (unsigned j = 0; j < node->incoming_links.size(); ++j) {
+ switch (node->incoming_links[j]->output_alpha_type) {
+ case ALPHA_INVALID:
+ any_invalid = true;
+ break;
+ case ALPHA_BLANK:
+ // Blank is good as both pre- and postmultiplied alpha,
+ // so just ignore it.
+ break;
+ case ALPHA_PREMULTIPLIED:
+ any_premultiplied = true;
+ break;
+ case ALPHA_POSTMULTIPLIED:
+ any_postmultiplied = true;
+ break;
+ default:
+ assert(false);
+ }
+ }
+
+ if (any_invalid) {
+ node->output_alpha_type = ALPHA_INVALID;
+ continue;
+ }
+
+ // Inputs must be of the same type.
+ if (any_premultiplied && any_postmultiplied) {
+ node->output_alpha_type = ALPHA_INVALID;
+ continue;
+ }
+
+ if (alpha_handling == Effect::INPUT_AND_OUTPUT_PREMULTIPLIED_ALPHA ||
+ alpha_handling == Effect::INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK) {
+ // If the effect has asked for premultiplied alpha, check that it has got it.
+ if (any_postmultiplied) {
+ node->output_alpha_type = ALPHA_INVALID;
+ } else if (!any_premultiplied &&
+ alpha_handling == Effect::INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK) {
+ // Blank input alpha, and the effect preserves blank alpha.
+ node->output_alpha_type = ALPHA_BLANK;
+ } else {
+ node->output_alpha_type = ALPHA_PREMULTIPLIED;
+ }
+ } else {
+ // OK, all inputs are the same, and this effect is not going
+ // to change it.
+ assert(alpha_handling == Effect::DONT_CARE_ALPHA_TYPE);
+ if (any_premultiplied) {
+ node->output_alpha_type = ALPHA_PREMULTIPLIED;
+ } else if (any_postmultiplied) {
+ node->output_alpha_type = ALPHA_POSTMULTIPLIED;
+ } else {
+ node->output_alpha_type = ALPHA_BLANK;
+ }
+ }
}
+}
- // Construct all needed GLSL programs, starting at the output.
- construct_glsl_programs(output_node);
+bool EffectChain::node_needs_colorspace_fix(Node *node)
+{
+ if (node->disabled) {
+ return false;
+ }
+ if (node->effect->num_inputs() == 0) {
+ return false;
+ }
- // If we have more than one phase, we need intermediate render-to-texture.
- // Construct an FBO, and then as many textures as we need.
- // We choose the simplest option of having one texture per output,
- // since otherwise this turns into an (albeit simple)
- // register allocation problem.
- if (phases.size() > 1) {
- glGenFramebuffers(1, &fbo);
+ // propagate_gamma_and_color_space() has already set our output
+ // to COLORSPACE_INVALID if the inputs differ, so we can rely on that.
+ if (node->output_color_space == COLORSPACE_INVALID) {
+ return true;
+ }
+ return (node->effect->needs_srgb_primaries() && node->output_color_space != COLORSPACE_sRGB);
+}
- for (unsigned i = 0; i < phases.size() - 1; ++i) {
- find_output_size(phases[i]);
+// Fix up color spaces so that there are no COLORSPACE_INVALID nodes left in
+// the graph. Our strategy is not always optimal, but quite simple:
+// Find an effect that's as early as possible where the inputs are of
+// unacceptable colorspaces (that is, either different, or, if the effect only
+// wants sRGB, not sRGB.) Add appropriate conversions on all its inputs,
+// propagate the information anew, and repeat until there are no more such
+// effects.
+void EffectChain::fix_internal_color_spaces()
+{
+ unsigned colorspace_propagation_pass = 0;
+ bool found_any;
+ do {
+ found_any = false;
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (!node_needs_colorspace_fix(node)) {
+ continue;
+ }
- Node *output_node = phases[i]->effects.back();
- glGenTextures(1, &output_node->output_texture);
- check_error();
- glBindTexture(GL_TEXTURE_2D, output_node->output_texture);
- check_error();
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- check_error();
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, phases[i]->output_width, phases[i]->output_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
- check_error();
+ // Go through each input that is not sRGB, and insert
+ // a colorspace conversion after it.
+ for (unsigned j = 0; j < node->incoming_links.size(); ++j) {
+ Node *input = node->incoming_links[j];
+ assert(input->output_color_space != COLORSPACE_INVALID);
+ if (input->output_color_space == COLORSPACE_sRGB) {
+ continue;
+ }
+ Node *conversion = add_node(new ColorspaceConversionEffect());
+ CHECK(conversion->effect->set_int("source_space", input->output_color_space));
+ CHECK(conversion->effect->set_int("destination_space", COLORSPACE_sRGB));
+ conversion->output_color_space = COLORSPACE_sRGB;
+ replace_sender(input, conversion);
+ connect_nodes(input, conversion);
+ }
- output_node->output_texture_width = phases[i]->output_width;
- output_node->output_texture_height = phases[i]->output_height;
+ // Re-sort topologically, and propagate the new information.
+ propagate_gamma_and_color_space();
+
+ found_any = true;
+ break;
}
+
+ char filename[256];
+ sprintf(filename, "step5-colorspacefix-iter%u.dot", ++colorspace_propagation_pass);
+ output_dot(filename);
+ assert(colorspace_propagation_pass < 100);
+ } while (found_any);
+
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (node->disabled) {
+ continue;
+ }
+ assert(node->output_color_space != COLORSPACE_INVALID);
}
-
- for (unsigned i = 0; i < inputs.size(); ++i) {
- inputs[i]->finalize();
+}
+
+bool EffectChain::node_needs_alpha_fix(Node *node)
+{
+ if (node->disabled) {
+ return false;
+ }
+
+ // propagate_alpha() has already set our output to ALPHA_INVALID if the
+ // inputs differ or we are otherwise in mismatch, so we can rely on that.
+ return (node->output_alpha_type == ALPHA_INVALID);
+}
+
+// Fix up alpha so that there are no ALPHA_INVALID nodes left in
+// the graph. Similar to fix_internal_color_spaces().
+void EffectChain::fix_internal_alpha(unsigned step)
+{
+ unsigned alpha_propagation_pass = 0;
+ bool found_any;
+ do {
+ found_any = false;
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (!node_needs_alpha_fix(node)) {
+ continue;
+ }
+
+ // If we need to fix up GammaExpansionEffect, then clearly something
+ // is wrong, since the combination of premultiplied alpha and nonlinear inputs
+ // is meaningless.
+ assert(node->effect->effect_type_id() != "GammaExpansionEffect");
+
+ AlphaType desired_type = ALPHA_PREMULTIPLIED;
+
+ // GammaCompressionEffect is special; it needs postmultiplied alpha.
+ if (node->effect->effect_type_id() == "GammaCompressionEffect") {
+ assert(node->incoming_links.size() == 1);
+ assert(node->incoming_links[0]->output_alpha_type == ALPHA_PREMULTIPLIED);
+ desired_type = ALPHA_POSTMULTIPLIED;
+ }
+
+ // Go through each input that is not premultiplied alpha, and insert
+ // a conversion before it.
+ for (unsigned j = 0; j < node->incoming_links.size(); ++j) {
+ Node *input = node->incoming_links[j];
+ assert(input->output_alpha_type != ALPHA_INVALID);
+ if (input->output_alpha_type == desired_type ||
+ input->output_alpha_type == ALPHA_BLANK) {
+ continue;
+ }
+ Node *conversion;
+ if (desired_type == ALPHA_PREMULTIPLIED) {
+ conversion = add_node(new AlphaMultiplicationEffect());
+ } else {
+ conversion = add_node(new AlphaDivisionEffect());
+ }
+ conversion->output_alpha_type = desired_type;
+ replace_sender(input, conversion);
+ connect_nodes(input, conversion);
+ }
+
+ // Re-sort topologically, and propagate the new information.
+ propagate_gamma_and_color_space();
+ propagate_alpha();
+
+ found_any = true;
+ break;
+ }
+
+ char filename[256];
+ sprintf(filename, "step%u-alphafix-iter%u.dot", step, ++alpha_propagation_pass);
+ output_dot(filename);
+ assert(alpha_propagation_pass < 100);
+ } while (found_any);
+
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (node->disabled) {
+ continue;
+ }
+ assert(node->output_alpha_type != ALPHA_INVALID);
+ }
+}
+
+// Make so that the output is in the desired color space.
+void EffectChain::fix_output_color_space()
+{
+ Node *output = find_output_node();
+ if (output->output_color_space != output_format.color_space) {
+ Node *conversion = add_node(new ColorspaceConversionEffect());
+ CHECK(conversion->effect->set_int("source_space", output->output_color_space));
+ CHECK(conversion->effect->set_int("destination_space", output_format.color_space));
+ conversion->output_color_space = output_format.color_space;
+ connect_nodes(output, conversion);
+ propagate_alpha();
+ propagate_gamma_and_color_space();
+ }
+}
+
+// Make so that the output is in the desired pre-/postmultiplication alpha state.
+void EffectChain::fix_output_alpha()
+{
+ Node *output = find_output_node();
+ assert(output->output_alpha_type != ALPHA_INVALID);
+ if (output->output_alpha_type == ALPHA_BLANK) {
+ // No alpha output, so we don't care.
+ return;
+ }
+ if (output->output_alpha_type == ALPHA_PREMULTIPLIED &&
+ output_alpha_format == OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED) {
+ Node *conversion = add_node(new AlphaDivisionEffect());
+ connect_nodes(output, conversion);
+ propagate_alpha();
+ propagate_gamma_and_color_space();
+ }
+ if (output->output_alpha_type == ALPHA_POSTMULTIPLIED &&
+ output_alpha_format == OUTPUT_ALPHA_FORMAT_PREMULTIPLIED) {
+ Node *conversion = add_node(new AlphaMultiplicationEffect());
+ connect_nodes(output, conversion);
+ propagate_alpha();
+ propagate_gamma_and_color_space();
+ }
+}
+
+bool EffectChain::node_needs_gamma_fix(Node *node)
+{
+ if (node->disabled) {
+ return false;
+ }
+
+ // Small hack since the output is not an explicit node:
+ // If we are the last node and our output is in the wrong
+ // space compared to EffectChain's output, we need to fix it.
+ // This will only take us to linear, but fix_output_gamma()
+ // will come and take us to the desired output gamma
+ // if it is needed.
+ //
+ // This needs to be before everything else, since it could
+ // even apply to inputs (if they are the only effect).
+ if (node->outgoing_links.empty() &&
+ node->output_gamma_curve != output_format.gamma_curve &&
+ node->output_gamma_curve != GAMMA_LINEAR) {
+ return true;
+ }
+
+ if (node->effect->num_inputs() == 0) {
+ return false;
+ }
+
+ // propagate_gamma_and_color_space() has already set our output
+ // to GAMMA_INVALID if the inputs differ, so we can rely on that,
+ // except for GammaCompressionEffect.
+ if (node->output_gamma_curve == GAMMA_INVALID) {
+ return true;
+ }
+ if (node->effect->effect_type_id() == "GammaCompressionEffect") {
+ assert(node->incoming_links.size() == 1);
+ return node->incoming_links[0]->output_gamma_curve != GAMMA_LINEAR;
+ }
+
+ return (node->effect->needs_linear_light() && node->output_gamma_curve != GAMMA_LINEAR);
+}
+
+// Very similar to fix_internal_color_spaces(), but for gamma.
+// There is one difference, though; before we start adding conversion nodes,
+// we see if we can get anything out of asking the sources to deliver
+// linear gamma directly. fix_internal_gamma_by_asking_inputs()
+// does that part, while fix_internal_gamma_by_inserting_nodes()
+// inserts nodes as needed afterwards.
+void EffectChain::fix_internal_gamma_by_asking_inputs(unsigned step)
+{
+ unsigned gamma_propagation_pass = 0;
+ bool found_any;
+ do {
+ found_any = false;
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (!node_needs_gamma_fix(node)) {
+ continue;
+ }
+
+ // See if all inputs can give us linear gamma. If not, leave it.
+ vector<Node *> nonlinear_inputs;
+ find_all_nonlinear_inputs(node, &nonlinear_inputs);
+ assert(!nonlinear_inputs.empty());
+
+ bool all_ok = true;
+ for (unsigned i = 0; i < nonlinear_inputs.size(); ++i) {
+ Input *input = static_cast<Input *>(nonlinear_inputs[i]->effect);
+ all_ok &= input->can_output_linear_gamma();
+ }
+
+ if (!all_ok) {
+ continue;
+ }
+
+ for (unsigned i = 0; i < nonlinear_inputs.size(); ++i) {
+ CHECK(nonlinear_inputs[i]->effect->set_int("output_linear_gamma", 1));
+ nonlinear_inputs[i]->output_gamma_curve = GAMMA_LINEAR;
+ }
+
+ // Re-sort topologically, and propagate the new information.
+ propagate_gamma_and_color_space();
+
+ found_any = true;
+ break;
+ }
+
+ char filename[256];
+ sprintf(filename, "step%u-gammafix-iter%u.dot", step, ++gamma_propagation_pass);
+ output_dot(filename);
+ assert(gamma_propagation_pass < 100);
+ } while (found_any);
+}
+
+void EffectChain::fix_internal_gamma_by_inserting_nodes(unsigned step)
+{
+ unsigned gamma_propagation_pass = 0;
+ bool found_any;
+ do {
+ found_any = false;
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (!node_needs_gamma_fix(node)) {
+ continue;
+ }
+
+ // Special case: We could be an input and still be asked to
+ // fix our gamma; if so, we should be the only node
+ // (as node_needs_gamma_fix() would only return true in
+ // for an input in that case). That means we should insert
+ // a conversion node _after_ ourselves.
+ if (node->incoming_links.empty()) {
+ assert(node->outgoing_links.empty());
+ Node *conversion = add_node(new GammaExpansionEffect());
+ CHECK(conversion->effect->set_int("source_curve", node->output_gamma_curve));
+ conversion->output_gamma_curve = GAMMA_LINEAR;
+ connect_nodes(node, conversion);
+ }
+
+ // If not, go through each input that is not linear gamma,
+ // and insert a gamma conversion after it.
+ for (unsigned j = 0; j < node->incoming_links.size(); ++j) {
+ Node *input = node->incoming_links[j];
+ assert(input->output_gamma_curve != GAMMA_INVALID);
+ if (input->output_gamma_curve == GAMMA_LINEAR) {
+ continue;
+ }
+ Node *conversion = add_node(new GammaExpansionEffect());
+ CHECK(conversion->effect->set_int("source_curve", input->output_gamma_curve));
+ conversion->output_gamma_curve = GAMMA_LINEAR;
+ replace_sender(input, conversion);
+ connect_nodes(input, conversion);
+ }
+
+ // Re-sort topologically, and propagate the new information.
+ propagate_alpha();
+ propagate_gamma_and_color_space();
+
+ found_any = true;
+ break;
+ }
+
+ char filename[256];
+ sprintf(filename, "step%u-gammafix-iter%u.dot", step, ++gamma_propagation_pass);
+ output_dot(filename);
+ assert(gamma_propagation_pass < 100);
+ } while (found_any);
+
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (node->disabled) {
+ continue;
+ }
+ assert(node->output_gamma_curve != GAMMA_INVALID);
+ }
+}
+
+// Make so that the output is in the desired gamma.
+// Note that this assumes linear input gamma, so it might create the need
+// for another pass of fix_internal_gamma().
+void EffectChain::fix_output_gamma()
+{
+ Node *output = find_output_node();
+ if (output->output_gamma_curve != output_format.gamma_curve) {
+ Node *conversion = add_node(new GammaCompressionEffect());
+ CHECK(conversion->effect->set_int("destination_curve", output_format.gamma_curve));
+ conversion->output_gamma_curve = output_format.gamma_curve;
+ connect_nodes(output, conversion);
+ }
+}
+
+// If the user has requested dither, add a DitherEffect right at the end
+// (after GammaCompressionEffect etc.). This needs to be done after everything else,
+// since dither is about the only effect that can _not_ be done in linear space.
+void EffectChain::add_dither_if_needed()
+{
+ if (num_dither_bits == 0) {
+ return;
+ }
+ Node *output = find_output_node();
+ Node *dither = add_node(new DitherEffect());
+ CHECK(dither->effect->set_int("num_bits", num_dither_bits));
+ connect_nodes(output, dither);
+
+ dither_effect = dither->effect;
+}
+
+// Find the output node. This is, simply, one that has no outgoing links.
+// If there are multiple ones, the graph is malformed (we do not support
+// multiple outputs right now).
+Node *EffectChain::find_output_node()
+{
+ vector<Node *> output_nodes;
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ Node *node = nodes[i];
+ if (node->disabled) {
+ continue;
+ }
+ if (node->outgoing_links.empty()) {
+ output_nodes.push_back(node);
+ }
}
+ assert(output_nodes.size() == 1);
+ return output_nodes[0];
+}
+
+void EffectChain::finalize()
+{
+ // Save the current locale, and set it to C, so that we can output decimal
+ // numbers with printf and be sure to get them in the format mandated by GLSL.
+ char *saved_locale = setlocale(LC_NUMERIC, "C");
+
+ // Output the graph as it is before we do any conversions on it.
+ output_dot("step0-start.dot");
+
+ // Give each effect in turn a chance to rewrite its own part of the graph.
+ // Note that if more effects are added as part of this, they will be
+ // picked up as part of the same for loop, since they are added at the end.
+ for (unsigned i = 0; i < nodes.size(); ++i) {
+ nodes[i]->effect->rewrite_graph(this, nodes[i]);
+ }
+ output_dot("step1-rewritten.dot");
+
+ find_color_spaces_for_inputs();
+ output_dot("step2-input-colorspace.dot");
+
+ propagate_alpha();
+ output_dot("step3-propagated-alpha.dot");
+
+ propagate_gamma_and_color_space();
+ output_dot("step4-propagated-all.dot");
+
+ fix_internal_color_spaces();
+ fix_internal_alpha(6);
+ fix_output_color_space();
+ output_dot("step7-output-colorspacefix.dot");
+ fix_output_alpha();
+ output_dot("step8-output-alphafix.dot");
+
+ // Note that we need to fix gamma after colorspace conversion,
+ // because colorspace conversions might create needs for gamma conversions.
+ // Also, we need to run an extra pass of fix_internal_gamma() after
+ // fixing the output gamma, as we only have conversions to/from linear,
+ // and fix_internal_alpha() since GammaCompressionEffect needs
+ // postmultiplied input.
+ fix_internal_gamma_by_asking_inputs(9);
+ fix_internal_gamma_by_inserting_nodes(10);
+ fix_output_gamma();
+ output_dot("step11-output-gammafix.dot");
+ propagate_alpha();
+ output_dot("step12-output-alpha-propagated.dot");
+ fix_internal_alpha(13);
+ output_dot("step14-output-alpha-fixed.dot");
+ fix_internal_gamma_by_asking_inputs(15);
+ fix_internal_gamma_by_inserting_nodes(16);
+
+ output_dot("step17-before-dither.dot");
+
+ add_dither_if_needed();
+
+ output_dot("step18-final.dot");
+
+ // Construct all needed GLSL programs, starting at the output.
+ // We need to keep track of which effects have already been computed,
+ // as an effect with multiple users could otherwise be calculated
+ // multiple times.
+ map<Node *, Phase *> completed_effects;
+ construct_phase(find_output_node(), &completed_effects);
+
+ output_dot("step19-split-to-phases.dot");
assert(phases[0]->inputs.empty());
finalized = true;
+ setlocale(LC_NUMERIC, saved_locale);
}
-void EffectChain::render_to_screen()
+void EffectChain::render_to_fbo(GLuint dest_fbo, unsigned width, unsigned height)
{
assert(finalized);
+ // Save original viewport.
+ GLuint x = 0, y = 0;
+ GLuint fbo = 0;
+ void *context = get_gl_context_identifier();
+
+ if (width == 0 && height == 0) {
+ GLint viewport[4];
+ glGetIntegerv(GL_VIEWPORT, viewport);
+ x = viewport[0];
+ y = viewport[1];
+ width = viewport[2];
+ height = viewport[3];
+ }
+
// Basic state.
glDisable(GL_BLEND);
check_error();
glDepthMask(GL_FALSE);
check_error();
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-
if (phases.size() > 1) {
+ if (fbos.count(context) == 0) {
+ glGenFramebuffers(1, &fbo);
+ check_error();
+ fbos.insert(make_pair(context, fbo));
+ } else {
+ fbo = fbos[context];
+ }
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
check_error();
}
- std::set<Node *> generated_mipmaps;
+ set<Phase *> generated_mipmaps;
- for (unsigned phase = 0; phase < phases.size(); ++phase) {
- // See if the requested output size has changed. If so, we need to recreate
- // the texture (and before we start setting up inputs).
- if (phase != phases.size() - 1) {
- find_output_size(phases[phase]);
+ // We choose the simplest option of having one texture per output,
+ // since otherwise this turns into an (albeit simple) register allocation problem.
+ map<Phase *, GLuint> output_textures;
- Node *output_node = phases[phase]->effects.back();
+ for (unsigned phase_num = 0; phase_num < phases.size(); ++phase_num) {
+ Phase *phase = phases[phase_num];
- if (output_node->output_texture_width != phases[phase]->output_width ||
- output_node->output_texture_height != phases[phase]->output_height) {
- glActiveTexture(GL_TEXTURE0);
- check_error();
- glBindTexture(GL_TEXTURE_2D, output_node->output_texture);
- check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, phases[phase]->output_width, phases[phase]->output_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
- check_error();
- glBindTexture(GL_TEXTURE_2D, 0);
- check_error();
+ // Find a texture for this phase.
+ inform_input_sizes(phase);
+ if (phase_num != phases.size() - 1) {
+ find_output_size(phase);
- output_node->output_texture_width = phases[phase]->output_width;
- output_node->output_texture_height = phases[phase]->output_height;
- }
+ GLuint tex_num = resource_pool->create_2d_texture(GL_RGBA16F_ARB, phase->output_width, phase->output_height);
+ output_textures.insert(make_pair(phase, tex_num));
}
- glUseProgram(phases[phase]->glsl_program_num);
+ const GLuint glsl_program_num = phase->glsl_program_num;
+ check_error();
+ glUseProgram(glsl_program_num);
check_error();
// Set up RTT inputs for this phase.
- for (unsigned sampler = 0; sampler < phases[phase]->inputs.size(); ++sampler) {
+ for (unsigned sampler = 0; sampler < phase->inputs.size(); ++sampler) {
glActiveTexture(GL_TEXTURE0 + sampler);
- Node *input = phases[phase]->inputs[sampler];
- glBindTexture(GL_TEXTURE_2D, input->output_texture);
+ Phase *input = phase->inputs[sampler];
+ input->output_node->bound_sampler_num = sampler;
+ glBindTexture(GL_TEXTURE_2D, output_textures[input]);
check_error();
- if (phases[phase]->input_needs_mipmaps) {
+ if (phase->input_needs_mipmaps) {
if (generated_mipmaps.count(input) == 0) {
glGenerateMipmap(GL_TEXTURE_2D);
check_error();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
check_error();
}
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ check_error();
- std::string texture_name = std::string("tex_") + input->effect_id;
- glUniform1i(glGetUniformLocation(phases[phase]->glsl_program_num, texture_name.c_str()), sampler);
+ string texture_name = string("tex_") + phase->effect_ids[input->output_node];
+ glUniform1i(glGetUniformLocation(glsl_program_num, texture_name.c_str()), sampler);
check_error();
}
// And now the output.
- if (phase == phases.size() - 1) {
- // Last phase goes directly to the screen.
- glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ if (phase_num == phases.size() - 1) {
+ // Last phase goes to the output the user specified.
+ glBindFramebuffer(GL_FRAMEBUFFER, dest_fbo);
check_error();
- glViewport(0, 0, width, height);
+ GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ assert(status == GL_FRAMEBUFFER_COMPLETE);
+ glViewport(x, y, width, height);
+ if (dither_effect != NULL) {
+ CHECK(dither_effect->set_int("output_width", width));
+ CHECK(dither_effect->set_int("output_height", height));
+ }
} else {
- Node *output_node = phases[phase]->effects.back();
glFramebufferTexture2D(
GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D,
- output_node->output_texture,
+ output_textures[phase],
0);
check_error();
- glViewport(0, 0, phases[phase]->output_width, phases[phase]->output_height);
+ GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ assert(status == GL_FRAMEBUFFER_COMPLETE);
+ glViewport(0, 0, phase->output_width, phase->output_height);
}
// Give the required parameters to all the effects.
- unsigned sampler_num = phases[phase]->inputs.size();
- for (unsigned i = 0; i < phases[phase]->effects.size(); ++i) {
- Node *node = phases[phase]->effects[i];
- node->effect->set_gl_state(phases[phase]->glsl_program_num, node->effect_id, &sampler_num);
+ unsigned sampler_num = phase->inputs.size();
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Node *node = phase->effects[i];
+ unsigned old_sampler_num = sampler_num;
+ node->effect->set_gl_state(glsl_program_num, phase->effect_ids[node], &sampler_num);
check_error();
- }
-
- // Now draw!
- glBegin(GL_QUADS);
- glTexCoord2f(0.0f, 0.0f);
- glVertex2f(0.0f, 0.0f);
-
- glTexCoord2f(1.0f, 0.0f);
- glVertex2f(1.0f, 0.0f);
-
- glTexCoord2f(1.0f, 1.0f);
- glVertex2f(1.0f, 1.0f);
-
- glTexCoord2f(0.0f, 1.0f);
- glVertex2f(0.0f, 1.0f);
+ if (node->effect->is_single_texture()) {
+ assert(sampler_num - old_sampler_num == 1);
+ node->bound_sampler_num = old_sampler_num;
+ } else {
+ node->bound_sampler_num = -1;
+ }
+ }
- glEnd();
+ glBindVertexArray(phase->vao);
+ check_error();
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
check_error();
- for (unsigned i = 0; i < phases[phase]->effects.size(); ++i) {
- Node *node = phases[phase]->effects[i];
+ for (unsigned i = 0; i < phase->effects.size(); ++i) {
+ Node *node = phase->effects[i];
node->effect->clear_gl_state();
}
}
+
+ for (map<Phase *, GLuint>::const_iterator texture_it = output_textures.begin();
+ texture_it != output_textures.end();
+ ++texture_it) {
+ resource_pool->release_2d_texture(texture_it->second);
+ }
+
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ check_error();
+ glBindVertexArray(0);
+ check_error();
+ glUseProgram(0);
+ check_error();
}
+
+} // namespace movit
projects / movit / blobdiff