#include <algorithm>
#include <set>
+#include <stack>
+#include <vector>
#include "util.h"
#include "effect_chain.h"
#include "mirror_effect.h"
#include "vignette_effect.h"
#include "blur_effect.h"
+#include "diffusion_effect.h"
+#include "glow_effect.h"
+#include "mix_effect.h"
+#include "input.h"
EffectChain::EffectChain(unsigned width, unsigned height)
: width(width),
height(height),
- last_added_effect(NULL),
- use_srgb_texture_format(false),
finalized(false) {}
-void EffectChain::add_input(const ImageFormat &format)
+Input *EffectChain::add_input(const ImageFormat &format)
{
- input_format = format;
- output_color_space.insert(std::make_pair(static_cast<Effect *>(NULL), format.color_space));
- output_gamma_curve.insert(std::make_pair(static_cast<Effect *>(NULL), format.gamma_curve));
- effect_ids.insert(std::make_pair(static_cast<Effect *>(NULL), "src_image"));
+ char eff_id[256];
+ sprintf(eff_id, "src_image%d", inputs.size());
+
+ Input *input = new Input(format, width, height);
+ effects.push_back(input);
+ inputs.push_back(input);
+ output_color_space.insert(std::make_pair(input, format.color_space));
+ output_gamma_curve.insert(std::make_pair(input, format.gamma_curve));
+ effect_ids.insert(std::make_pair(input, eff_id));
+ incoming_links.insert(std::make_pair(input, std::vector<Effect *>()));
+ return input;
}
void EffectChain::add_output(const ImageFormat &format)
effect_ids.insert(std::make_pair(effect, effect_id));
assert(inputs.size() == effect->num_inputs());
for (unsigned i = 0; i < inputs.size(); ++i) {
- if (inputs[i] != NULL) {
- assert(std::find(effects.begin(), effects.end(), inputs[i]) != effects.end());
- }
+ assert(std::find(effects.begin(), effects.end(), inputs[i]) != effects.end());
outgoing_links[inputs[i]].push_back(effect);
}
incoming_links.insert(std::make_pair(effect, inputs));
- last_added_effect = effect;
+ output_gamma_curve[effect] = output_gamma_curve[last_added_effect()];
+ output_color_space[effect] = output_color_space[last_added_effect()];
}
Effect *instantiate_effect(EffectId effect)
return new VignetteEffect();
case EFFECT_BLUR:
return new BlurEffect();
+ case EFFECT_DIFFUSION:
+ return new DiffusionEffect();
+ case EFFECT_GLOW:
+ return new GlowEffect();
+ case EFFECT_MIX:
+ return new MixEffect();
}
assert(false);
}
+// Set the "use_srgb_texture_format" option on all inputs that feed into this node,
+// and update the output_gamma_curve[] map as we go.
+//
+// NOTE: We assume that the only way we could actually get GAMMA_sRGB from an
+// effect (except from GammaCompressionCurve, which should never be inserted
+// into a chain when this is called) is by pass-through from a texture.
+// Thus, we can simply feed the flag up towards all inputs.
+void EffectChain::set_use_srgb_texture_format(Effect *effect)
+{
+ assert(output_gamma_curve.count(effect) != 0);
+ assert(output_gamma_curve[effect] == GAMMA_sRGB);
+ if (effect->num_inputs() == 0) {
+ effect->set_int("use_srgb_texture_format", 1);
+ } else {
+ assert(incoming_links.count(effect) == 1);
+ std::vector<Effect *> deps = incoming_links[effect];
+ assert(effect->num_inputs() == deps.size());
+ for (unsigned i = 0; i < deps.size(); ++i) {
+ set_use_srgb_texture_format(deps[i]);
+ assert(output_gamma_curve[deps[i]] == GAMMA_LINEAR);
+ }
+ }
+ output_gamma_curve[effect] = GAMMA_LINEAR;
+}
+
Effect *EffectChain::normalize_to_linear_gamma(Effect *input)
{
- GammaCurve current_gamma_curve = output_gamma_curve[input];
- if (current_gamma_curve == GAMMA_sRGB) {
+ assert(output_gamma_curve.count(input) != 0);
+ if (output_gamma_curve[input] == GAMMA_sRGB) {
// TODO: check if the extension exists
- use_srgb_texture_format = true;
- current_gamma_curve = GAMMA_LINEAR;
+ set_use_srgb_texture_format(input);
+ output_gamma_curve[input] = GAMMA_LINEAR;
return input;
} else {
GammaExpansionEffect *gamma_conversion = new GammaExpansionEffect();
- gamma_conversion->set_int("source_curve", current_gamma_curve);
+ gamma_conversion->set_int("source_curve", output_gamma_curve[input]);
std::vector<Effect *> inputs;
inputs.push_back(input);
gamma_conversion->add_self_to_effect_chain(this, inputs);
- current_gamma_curve = GAMMA_LINEAR;
+ output_gamma_curve[gamma_conversion] = GAMMA_LINEAR;
return gamma_conversion;
}
}
Effect *EffectChain::normalize_to_srgb(Effect *input)
{
- GammaCurve current_gamma_curve = output_gamma_curve[input];
- ColorSpace current_color_space = output_color_space[input];
- assert(current_gamma_curve == GAMMA_LINEAR);
+ assert(output_gamma_curve.count(input) != 0);
+ assert(output_color_space.count(input) != 0);
+ assert(output_gamma_curve[input] == GAMMA_LINEAR);
ColorSpaceConversionEffect *colorspace_conversion = new ColorSpaceConversionEffect();
- colorspace_conversion->set_int("source_space", current_color_space);
+ colorspace_conversion->set_int("source_space", output_color_space[input]);
colorspace_conversion->set_int("destination_space", COLORSPACE_sRGB);
std::vector<Effect *> inputs;
inputs.push_back(input);
colorspace_conversion->add_self_to_effect_chain(this, inputs);
- current_color_space = COLORSPACE_sRGB;
+ output_color_space[colorspace_conversion] = COLORSPACE_sRGB;
return colorspace_conversion;
}
std::vector<Effect *> normalized_inputs = inputs;
for (unsigned i = 0; i < normalized_inputs.size(); ++i) {
+ assert(output_gamma_curve.count(normalized_inputs[i]) != 0);
if (effect->needs_linear_light() && output_gamma_curve[normalized_inputs[i]] != GAMMA_LINEAR) {
normalized_inputs[i] = normalize_to_linear_gamma(normalized_inputs[i]);
}
+ assert(output_color_space.count(normalized_inputs[i]) != 0);
if (effect->needs_srgb_primaries() && output_color_space[normalized_inputs[i]] != COLORSPACE_sRGB) {
normalized_inputs[i] = normalize_to_srgb(normalized_inputs[i]);
}
EffectChain::Phase EffectChain::compile_glsl_program(const std::vector<Effect *> &inputs, const std::vector<Effect *> &effects)
{
- assert(!inputs.empty());
assert(!effects.empty());
- // Figure out the true set of inputs to this phase. These are the ones
- // that we need somehow but don't calculate ourselves.
- std::set<Effect *> effect_set(effects.begin(), effects.end());
- std::set<Effect *> input_set(inputs.begin(), inputs.end());
- std::vector<Effect *> true_inputs;
- std::set_difference(input_set.begin(), input_set.end(),
- effect_set.begin(), effect_set.end(),
- std::back_inserter(true_inputs));
+ // Deduplicate the inputs.
+ std::vector<Effect *> 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");
frag_shader += std::string("uniform sampler2D tex_") + effect_id + ";\n";
frag_shader += std::string("vec4 ") + effect_id + "(vec2 tc) {\n";
- if (effect == NULL) {
+ if (effect->num_inputs() == 0) {
// OpenGL's origin is bottom-left, but most graphics software assumes
// a top-left origin. Thus, for inputs that come from the user,
// we flip the y coordinate. However, for FBOs, the origin
input_needs_mipmaps |= effect->needs_mipmaps();
}
+ for (unsigned i = 0; i < effects.size(); ++i) {
+ Effect *effect = effects[i];
+ if (effect->num_inputs() == 0) {
+ effect->set_int("needs_mipmaps", input_needs_mipmaps);
+ }
+ }
assert(!last_effect_id.empty());
frag_shader += std::string("#define INPUT ") + last_effect_id + "\n";
frag_shader.append(read_file("footer.frag"));
// the chain from there. We end a program every time we come to an effect
// marked as "needs texture bounce", one that is used by multiple other
// effects, and of course at the end.
-void EffectChain::construct_glsl_programs(Effect *start, std::set<Effect *> *completed_effects)
+//
+// We follow a quite simple depth-first search from the output, although
+// without any explicit recursion.
+void EffectChain::construct_glsl_programs(Effect *output)
{
- if (completed_effects->count(start) != 0) {
- // This has already been done for us.
- return;
- }
+ // 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<Effect *> completed_effects;
- std::vector<Effect *> this_phase_inputs; // Also includes all intermediates; these will be filtered away later.
+ // 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<Effect *> this_phase_inputs;
std::vector<Effect *> this_phase_effects;
- Effect *node = start;
+
+ // Effects that we have yet to calculate, but that we know should
+ // be in the current phase.
+ std::stack<Effect *> 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<Effect *> effects_todo_other_phases;
+
+ effects_todo_this_phase.push(output);
+
for ( ;; ) { // Termination condition within loop.
- if (node == NULL) {
- this_phase_inputs.push_back(node);
- } else {
- // Check that we have all the inputs we need for this effect.
- // If not, we end the phase here right away; the other side
- // of the input chain will eventually come and pick the effect up.
- assert(incoming_links.count(node) != 0);
- std::vector<Effect *> deps = incoming_links[node];
- assert(!deps.empty());
- bool have_all_deps = true;
+ if (!effects_todo_this_phase.empty()) {
+ // OK, we have more to do this phase.
+ Effect *effect = 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(effect) == 0);
+
+ this_phase_effects.push_back(effect);
+ completed_effects.insert(effect);
+
+ // Find all the dependencies of this effect, and add them to the stack.
+ assert(incoming_links.count(effect) == 1);
+ std::vector<Effect *> deps = incoming_links[effect];
+ assert(effect->num_inputs() == deps.size());
for (unsigned i = 0; i < deps.size(); ++i) {
- if (completed_effects->count(deps[i]) == 0) {
- have_all_deps = false;
- break;
+ bool start_new_phase = false;
+
+ if (effect->needs_texture_bounce()) {
+ start_new_phase = true;
}
- }
-
- if (!have_all_deps) {
- if (!this_phase_effects.empty()) {
- phases.push_back(compile_glsl_program(this_phase_inputs, this_phase_effects));
+
+ assert(outgoing_links.count(deps[i]) == 1);
+ if (outgoing_links[deps[i]].size() > 1 && deps[i]->num_inputs() > 0) {
+ // 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;
+ }
+
+ 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]);
}
- return;
}
- this_phase_inputs.insert(this_phase_inputs.end(), deps.begin(), deps.end());
- this_phase_effects.push_back(node);
+ continue;
}
- completed_effects->insert(node);
- // Find all the effects that use this one as a direct input.
- if (outgoing_links.count(node) == 0) {
- // End of the line; output.
+ // 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));
- return;
+ this_phase_inputs.clear();
+ this_phase_effects.clear();
}
+ assert(this_phase_inputs.empty());
+ assert(this_phase_effects.empty());
- std::vector<Effect *> next = outgoing_links[node];
- assert(!next.empty());
- if (next.size() > 1) {
- // More than one effect uses this as the input.
- // 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.
- if (node != NULL) {
- phases.push_back(compile_glsl_program(this_phase_inputs, this_phase_effects));
- }
-
- // Start phases for all the effects that need us (in arbitrary order).
- for (unsigned i = 0; i < next.size(); ++i) {
- construct_glsl_programs(next[i], completed_effects);
- }
- return;
+ // If we have no effects left, exit.
+ if (effects_todo_other_phases.empty()) {
+ break;
}
-
- // OK, only one effect uses this as the input. Keep iterating,
- // but first see if it requires a texture bounce; if so, give it
- // one by starting a new phase.
- node = next[0];
- if (node->needs_texture_bounce()) {
- phases.push_back(compile_glsl_program(this_phase_inputs, this_phase_effects));
- this_phase_inputs.clear();
- this_phase_effects.clear();
+
+ Effect *effect = effects_todo_other_phases.top();
+ effects_todo_other_phases.pop();
+
+ if (completed_effects.count(effect) == 0) {
+ // Start a new phase, calculating from this effect.
+ effects_todo_this_phase.push(effect);
}
}
+
+ // 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());
}
void EffectChain::finalize()
{
+ // 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<Effect *> output_effects;
+ for (unsigned i = 0; i < effects.size(); ++i) {
+ Effect *effect = effects[i];
+ if (outgoing_links.count(effect) == 0 || outgoing_links[effect].size() == 0) {
+ output_effects.push_back(effect);
+ }
+ }
+ assert(output_effects.size() == 1);
+ Effect *output_effect = output_effects[0];
+
// Add normalizers to get the output format right.
- GammaCurve current_gamma_curve = output_gamma_curve[last_added_effect]; // FIXME
- ColorSpace current_color_space = output_color_space[last_added_effect]; // FIXME
+ assert(output_gamma_curve.count(output_effect) != 0);
+ assert(output_color_space.count(output_effect) != 0);
+ ColorSpace current_color_space = output_color_space[output_effect];
if (current_color_space != output_format.color_space) {
ColorSpaceConversionEffect *colorspace_conversion = new ColorSpaceConversionEffect();
colorspace_conversion->set_int("source_space", current_color_space);
colorspace_conversion->set_int("destination_space", output_format.color_space);
- effects.push_back(colorspace_conversion);
- current_color_space = output_format.color_space;
+ std::vector<Effect *> inputs;
+ inputs.push_back(output_effect);
+ colorspace_conversion->add_self_to_effect_chain(this, inputs);
+ output_color_space[colorspace_conversion] = output_format.color_space;
+ output_effect = colorspace_conversion;
}
+ GammaCurve current_gamma_curve = output_gamma_curve[output_effect];
if (current_gamma_curve != output_format.gamma_curve) {
if (current_gamma_curve != GAMMA_LINEAR) {
- normalize_to_linear_gamma(last_added_effect); // FIXME
+ output_effect = normalize_to_linear_gamma(output_effect);
+ current_gamma_curve = GAMMA_LINEAR;
}
- assert(current_gamma_curve == GAMMA_LINEAR);
GammaCompressionEffect *gamma_conversion = new GammaCompressionEffect();
gamma_conversion->set_int("destination_curve", output_format.gamma_curve);
- effects.push_back(gamma_conversion);
- current_gamma_curve = output_format.gamma_curve;
+ std::vector<Effect *> inputs;
+ inputs.push_back(output_effect);
+ gamma_conversion->add_self_to_effect_chain(this, inputs);
+ output_gamma_curve[gamma_conversion] = output_format.gamma_curve;
+ output_effect = gamma_conversion;
}
- // Construct all needed GLSL programs, starting at the input.
- std::set<Effect *> completed_effects;
- construct_glsl_programs(NULL, &completed_effects);
+ // Construct all needed GLSL programs, starting at the output.
+ construct_glsl_programs(output_effect);
// If we have more than one phase, we need intermediate render-to-texture.
// Construct an FBO, and then as many textures as we need.
effect_output_textures.insert(std::make_pair(output_effect, temp_texture));
}
}
-
- // Translate the input format to OpenGL's enums.
- GLenum internal_format;
- if (use_srgb_texture_format) {
- internal_format = GL_SRGB8;
- } else {
- internal_format = GL_RGBA8;
- }
- if (input_format.pixel_format == FORMAT_RGB) {
- format = GL_RGB;
- bytes_per_pixel = 3;
- } else if (input_format.pixel_format == FORMAT_RGBA) {
- format = GL_RGBA;
- bytes_per_pixel = 4;
- } else if (input_format.pixel_format == FORMAT_BGR) {
- format = GL_BGR;
- bytes_per_pixel = 3;
- } else if (input_format.pixel_format == FORMAT_BGRA) {
- format = GL_BGRA;
- bytes_per_pixel = 4;
- } else {
- assert(false);
+
+ for (unsigned i = 0; i < inputs.size(); ++i) {
+ inputs[i]->finalize();
}
-
- // Create PBO to hold the texture holding the input image, and then the texture itself.
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 2);
- check_error();
- glBufferData(GL_PIXEL_UNPACK_BUFFER_ARB, width * height * bytes_per_pixel, NULL, GL_STREAM_DRAW);
- check_error();
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
- check_error();
- glGenTextures(1, &source_image_num);
- check_error();
- glBindTexture(GL_TEXTURE_2D, source_image_num);
- check_error();
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- check_error();
- // Intel/Mesa seems to have a broken glGenerateMipmap() for non-FBO textures, so do it here.
- glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, phases[0].input_needs_mipmaps ? GL_TRUE : GL_FALSE);
- check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0, format, GL_UNSIGNED_BYTE, NULL);
- check_error();
-
finalized = true;
}
-void EffectChain::render_to_screen(unsigned char *src)
+void EffectChain::render_to_screen()
{
assert(finalized);
- // Copy the pixel data into the PBO.
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 2);
- check_error();
- void *mapped_pbo = glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, GL_WRITE_ONLY);
- memcpy(mapped_pbo, src, width * height * bytes_per_pixel);
- glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB);
- check_error();
-
- // Re-upload the texture from the PBO.
- glActiveTexture(GL_TEXTURE0);
- check_error();
- glBindTexture(GL_TEXTURE_2D, source_image_num);
- check_error();
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, GL_UNSIGNED_BYTE, BUFFER_OFFSET(0));
- 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();
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
- check_error();
-
// Basic state.
glDisable(GL_BLEND);
check_error();
}
std::set<Effect *> generated_mipmaps;
- generated_mipmaps.insert(NULL); // Already done further up.
+ for (unsigned i = 0; i < inputs.size(); ++i) {
+ // Inputs generate their own mipmaps if they need to
+ // (see input.cpp).
+ generated_mipmaps.insert(inputs[i]);
+ }
for (unsigned phase = 0; phase < phases.size(); ++phase) {
glUseProgram(phases[phase].glsl_program_num);
check_error();
- // Set up inputs for this phase.
- assert(!phases[phase].inputs.empty());
+ // Set up RTT inputs for this phase.
for (unsigned sampler = 0; sampler < phases[phase].inputs.size(); ++sampler) {
glActiveTexture(GL_TEXTURE0 + sampler);
Effect *input = phases[phase].inputs[sampler];
- if (input == NULL) {
- glBindTexture(GL_TEXTURE_2D, source_image_num);
- check_error();
- } else {
- assert(effect_output_textures.count(input) != 0);
- glBindTexture(GL_TEXTURE_2D, effect_output_textures[input]);
- check_error();
- }
+ assert(effect_output_textures.count(input) != 0);
+ glBindTexture(GL_TEXTURE_2D, effect_output_textures[input]);
+ check_error();
if (phases[phase].input_needs_mipmaps) {
if (generated_mipmaps.count(input) == 0) {
glGenerateMipmap(GL_TEXTURE_2D);
unsigned sampler_num = phases[phase].inputs.size();
for (unsigned i = 0; i < phases[phase].effects.size(); ++i) {
Effect *effect = phases[phase].effects[i];
- effect->set_uniforms(phases[phase].glsl_program_num, effect_ids[effect], &sampler_num);
+ effect->set_gl_state(phases[phase].glsl_program_num, effect_ids[effect], &sampler_num);
}
// Now draw!
glEnd();
check_error();
- // HACK
- glActiveTexture(GL_TEXTURE0);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
- check_error();
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1000);
- check_error();
+ for (unsigned i = 0; i < phases[phase].effects.size(); ++i) {
+ Effect *effect = phases[phase].effects[i];
+ effect->clear_gl_state();
+ }
}
}
projects / movit / blobdiff