-#define GL_GLEXT_PROTOTYPES 1
-
#include <epoxy/gl.h>
#include <assert.h>
#include <math.h>
EffectChain::EffectChain(float aspect_nom, float aspect_denom, ResourcePool *resource_pool)
: aspect_nom(aspect_nom),
aspect_denom(aspect_denom),
+ output_color_rgba(false),
+ output_color_ycbcr(false),
dither_effect(NULL),
num_dither_bits(0),
+ output_origin(OUTPUT_ORIGIN_BOTTOM_LEFT),
finalized(false),
resource_pool(resource_pool),
do_phase_timing(false) {
} else {
owns_resource_pool = false;
}
+
+ // Generate a VBO with some data in (shared position and texture coordinate data).
+ float vertices[] = {
+ 0.0f, 2.0f,
+ 0.0f, 0.0f,
+ 2.0f, 0.0f
+ };
+ vbo = generate_vbo(2, GL_FLOAT, sizeof(vertices), vertices);
}
EffectChain::~EffectChain()
if (owns_resource_pool) {
delete resource_pool;
}
+ glDeleteBuffers(1, &vbo);
+ check_error();
}
Input *EffectChain::add_input(Input *input)
void EffectChain::add_output(const ImageFormat &format, OutputAlphaFormat alpha_format)
{
assert(!finalized);
+ assert(!output_color_rgba);
output_format = format;
output_alpha_format = alpha_format;
- output_color_type = OUTPUT_COLOR_RGB;
+ output_color_rgba = true;
}
void EffectChain::add_ycbcr_output(const ImageFormat &format, OutputAlphaFormat alpha_format,
- const YCbCrFormat &ycbcr_format)
+ const YCbCrFormat &ycbcr_format, YCbCrOutputSplitting output_splitting)
{
assert(!finalized);
+ assert(!output_color_ycbcr);
output_format = format;
output_alpha_format = alpha_format;
- output_color_type = OUTPUT_COLOR_YCBCR;
+ output_color_ycbcr = true;
output_ycbcr_format = ycbcr_format;
+ output_ycbcr_splitting = output_splitting;
assert(ycbcr_format.chroma_subsampling_x == 1);
assert(ycbcr_format.chroma_subsampling_y == 1);
return GL_TEXTURE0 + node->incoming_links[input_num]->bound_sampler_num;
}
+GLenum EffectChain::has_input_sampler(Node *node, unsigned input_num) const
+{
+ assert(input_num < node->incoming_links.size());
+ return node->incoming_links[input_num]->bound_sampler_num >= 0 &&
+ node->incoming_links[input_num]->bound_sampler_num < 8;
+}
+
void EffectChain::find_all_nonlinear_inputs(Node *node, vector<Node *> *nonlinear_inputs)
{
if (node->output_gamma_curve == GAMMA_LINEAR &&
return effect;
}
-// GLSL pre-1.30 doesn't support token pasting. Replace PREFIX(x) with <effect_id>_x.
+// ESSL doesn't support token pasting. Replace PREFIX(x) with <effect_id>_x.
string replace_prefix(const string &text, const string &prefix)
{
string output;
frag_shader += "\n";
}
frag_shader += string("#define INPUT ") + phase->effect_ids[phase->effects.back()] + "\n";
- frag_shader.append(read_version_dependent_file("footer", "frag"));
+
+ // If we're the last phase, add the right #defines for Y'CbCr multi-output as needed.
+ vector<string> frag_shader_outputs; // In order.
+ if (phase->output_node->outgoing_links.empty() && output_color_ycbcr) {
+ switch (output_ycbcr_splitting) {
+ case YCBCR_OUTPUT_INTERLEAVED:
+ // No #defines set.
+ frag_shader_outputs.push_back("FragColor");
+ break;
+ case YCBCR_OUTPUT_SPLIT_Y_AND_CBCR:
+ frag_shader += "#define YCBCR_OUTPUT_SPLIT_Y_AND_CBCR 1\n";
+ frag_shader_outputs.push_back("Y");
+ frag_shader_outputs.push_back("Chroma");
+ break;
+ case YCBCR_OUTPUT_PLANAR:
+ frag_shader += "#define YCBCR_OUTPUT_PLANAR 1\n";
+ frag_shader_outputs.push_back("Y");
+ frag_shader_outputs.push_back("Cb");
+ frag_shader_outputs.push_back("Cr");
+ break;
+ default:
+ assert(false);
+ }
+
+ if (output_color_rgba) {
+ // Note: Needs to come in the header, because not only the
+ // output needs to see it (YCbCrConversionEffect and DitherEffect
+ // do, too).
+ frag_shader_header += "#define YCBCR_ALSO_OUTPUT_RGBA 1\n";
+ frag_shader_outputs.push_back("RGBA");
+ }
+ }
+ frag_shader.append(read_file("footer.frag"));
// Collect uniforms from all effects and output them. Note that this needs
// to happen after output_fragment_shader(), even though the uniforms come
extract_uniform_declarations(effect->uniforms_vec2, "vec2", effect_id, &phase->uniforms_vec2, &frag_shader_uniforms);
extract_uniform_declarations(effect->uniforms_vec3, "vec3", effect_id, &phase->uniforms_vec3, &frag_shader_uniforms);
extract_uniform_declarations(effect->uniforms_vec4, "vec4", effect_id, &phase->uniforms_vec4, &frag_shader_uniforms);
+ extract_uniform_array_declarations(effect->uniforms_float_array, "float", effect_id, &phase->uniforms_float, &frag_shader_uniforms);
extract_uniform_array_declarations(effect->uniforms_vec2_array, "vec2", effect_id, &phase->uniforms_vec2, &frag_shader_uniforms);
+ extract_uniform_array_declarations(effect->uniforms_vec3_array, "vec3", effect_id, &phase->uniforms_vec3, &frag_shader_uniforms);
extract_uniform_array_declarations(effect->uniforms_vec4_array, "vec4", effect_id, &phase->uniforms_vec4, &frag_shader_uniforms);
extract_uniform_declarations(effect->uniforms_mat3, "mat3", effect_id, &phase->uniforms_mat3, &frag_shader_uniforms);
}
frag_shader = frag_shader_header + frag_shader_uniforms + frag_shader;
string vert_shader = read_version_dependent_file("vs", "vert");
- phase->glsl_program_num = resource_pool->compile_glsl_program(vert_shader, frag_shader);
+
+ // If we're the last phase and need to flip the picture to compensate for
+ // the origin, tell the vertex shader so.
+ if (phase->output_node->outgoing_links.empty() && output_origin == OUTPUT_ORIGIN_TOP_LEFT) {
+ const string needle = "#define FLIP_ORIGIN 0";
+ size_t pos = vert_shader.find(needle);
+ assert(pos != string::npos);
+
+ vert_shader[pos + needle.size() - 1] = '1';
+ }
+
+ phase->glsl_program_num = resource_pool->compile_glsl_program(vert_shader, frag_shader, frag_shader_outputs);
+ GLint position_attribute_index = glGetAttribLocation(phase->glsl_program_num, "position");
+ GLint texcoord_attribute_index = glGetAttribLocation(phase->glsl_program_num, "texcoord");
+ if (position_attribute_index != -1) {
+ phase->attribute_indexes.insert(position_attribute_index);
+ }
+ if (texcoord_attribute_index != -1) {
+ phase->attribute_indexes.insert(texcoord_attribute_index);
+ }
// Collect the resulting location numbers for each uniform.
collect_uniform_locations(phase->glsl_program_num, &phase->uniforms_sampler2d);
bool start_new_phase = false;
if (node->effect->needs_texture_bounce() &&
- !deps[i]->effect->is_single_texture()) {
+ !deps[i]->effect->is_single_texture() &&
+ !deps[i]->effect->override_disable_bounce()) {
start_new_phase = true;
}
// and create a GLSL program for it.
assert(!phase->effects.empty());
- // Deduplicate the inputs.
- sort(phase->inputs.begin(), phase->inputs.end());
- phase->inputs.erase(unique(phase->inputs.begin(), phase->inputs.end()), phase->inputs.end());
+ // Deduplicate the inputs, but don't change the ordering e.g. by sorting;
+ // that would be nondeterministic and thus reduce cacheability.
+ // TODO: Make this even more deterministic.
+ vector<Phase *> dedup_inputs;
+ set<Phase *> seen_inputs;
+ for (size_t i = 0; i < phase->inputs.size(); ++i) {
+ if (seen_inputs.insert(phase->inputs[i]).second) {
+ dedup_inputs.push_back(phase->inputs[i]);
+ }
+ }
+ swap(phase->inputs, dedup_inputs);
// Allocate samplers for each input.
phase->input_samplers.resize(phase->inputs.size());
// gamma-encoded data.
void EffectChain::add_ycbcr_conversion_if_needed()
{
- assert(output_color_type == OUTPUT_COLOR_RGB || output_color_type == OUTPUT_COLOR_YCBCR);
- if (output_color_type != OUTPUT_COLOR_YCBCR) {
+ assert(output_color_rgba || output_color_ycbcr);
+ if (!output_color_ycbcr) {
return;
}
Node *output = find_output_node();
{
assert(finalized);
+ // This needs to be set anew, in case we are coming from a different context
+ // from when we initialized.
+ check_error();
+ glDisable(GL_DITHER);
+ check_error();
+
// Save original viewport.
GLuint x = 0, y = 0;
}
// Basic state.
+ check_error();
glDisable(GL_BLEND);
check_error();
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
check_error();
- // Generate a VAO. All the phases should have exactly the same vertex attributes,
- // so it's safe to reuse this.
- float vertices[] = {
- 0.0f, 2.0f,
- 0.0f, 0.0f,
- 2.0f, 0.0f
- };
-
+ // Generate a VAO that will be used during the entire execution,
+ // and bind the VBO, since it contains all the data.
GLuint vao;
glGenVertexArrays(1, &vao);
check_error();
glBindVertexArray(vao);
check_error();
-
- GLuint position_vbo = fill_vertex_attribute(phases[0]->glsl_program_num, "position", 2, GL_FLOAT, sizeof(vertices), vertices);
- GLuint texcoord_vbo = fill_vertex_attribute(phases[0]->glsl_program_num, "texcoord", 2, GL_FLOAT, sizeof(vertices), vertices); // Same as vertices.
+ glBindBuffer(GL_ARRAY_BUFFER, vbo);
+ check_error();
+ set<GLint> bound_attribute_indices;
set<Phase *> generated_mipmaps;
CHECK(dither_effect->set_int("output_height", height));
}
}
- execute_phase(phase, phase_num == phases.size() - 1, &output_textures, &generated_mipmaps);
+ execute_phase(phase, phase_num == phases.size() - 1, &bound_attribute_indices, &output_textures, &generated_mipmaps);
if (do_phase_timing) {
glEndQuery(GL_TIME_ELAPSED);
}
glUseProgram(0);
check_error();
- cleanup_vertex_attribute(phases[0]->glsl_program_num, "position", position_vbo);
- cleanup_vertex_attribute(phases[0]->glsl_program_num, "texcoord", texcoord_vbo);
-
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ check_error();
+ glBindVertexArray(0);
+ check_error();
glDeleteVertexArrays(1, &vao);
check_error();
printf("Total: %5.1f ms\n", total_time_ms);
}
-void EffectChain::execute_phase(Phase *phase, bool last_phase, map<Phase *, GLuint> *output_textures, set<Phase *> *generated_mipmaps)
+void EffectChain::execute_phase(Phase *phase, bool last_phase,
+ set<GLint> *bound_attribute_indices,
+ map<Phase *, GLuint> *output_textures,
+ set<Phase *> *generated_mipmaps)
{
GLuint fbo = 0;
output_textures->insert(make_pair(phase, tex_num));
}
- const GLuint glsl_program_num = phase->glsl_program_num;
- check_error();
- glUseProgram(glsl_program_num);
+ glUseProgram(phase->glsl_program_num);
check_error();
// Set up RTT inputs for this phase.
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);
+ node->effect->set_gl_state(phase->glsl_program_num, phase->effect_ids[node], &sampler_num);
check_error();
if (node->effect->is_single_texture()) {
// from there.
setup_uniforms(phase);
- glDrawArrays(GL_TRIANGLES, 0, 3);
- check_error();
+ // Clean up old attributes if they are no longer needed.
+ for (set<GLint>::iterator attr_it = bound_attribute_indices->begin();
+ attr_it != bound_attribute_indices->end(); ) {
+ if (phase->attribute_indexes.count(*attr_it) == 0) {
+ glDisableVertexAttribArray(*attr_it);
+ check_error();
+ bound_attribute_indices->erase(attr_it++);
+ } else {
+ ++attr_it;
+ }
+ }
- glUseProgram(0);
- check_error();
+ // Set up the new attributes, if needed.
+ for (set<GLint>::iterator attr_it = phase->attribute_indexes.begin();
+ attr_it != phase->attribute_indexes.end();
+ ++attr_it) {
+ if (bound_attribute_indices->count(*attr_it) == 0) {
+ glEnableVertexAttribArray(*attr_it);
+ check_error();
+ glVertexAttribPointer(*attr_it, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
+ check_error();
+ bound_attribute_indices->insert(*attr_it);
+ }
+ }
+ glDrawArrays(GL_TRIANGLES, 0, 3);
+ check_error();
+
for (unsigned i = 0; i < phase->effects.size(); ++i) {
Node *node = phase->effects[i];
node->effect->clear_gl_state();
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