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godot/drivers/gles3/shader_gles3.cpp

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/*************************************************************************/
/* shader_gles3.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "shader_gles3.h"
#include "core/local_vector.h"
#include "core/os/os.h"
#include "core/print_string.h"
#include "core/threaded_callable_queue.h"
#include "drivers/gles3/shader_cache_gles3.h"
#include "servers/visual_server.h"
//#define DEBUG_OPENGL
#ifdef DEBUG_OPENGL
#define DEBUG_TEST_ERROR(m_section) \
{ \
uint32_t err = glGetError(); \
if (err) { \
print_line("OpenGL Error #" + itos(err) + " at: " + m_section); \
} \
}
#else
#define DEBUG_TEST_ERROR(m_section)
#endif
ShaderGLES3 *ShaderGLES3::active = nullptr;
SelfList<ShaderGLES3::Version>::List ShaderGLES3::versions_compiling;
ShaderCacheGLES3 *ShaderGLES3::shader_cache;
ThreadedCallableQueue<GLuint> *ShaderGLES3::cache_write_queue;
ThreadedCallableQueue<GLuint> *ShaderGLES3::compile_queue;
bool ShaderGLES3::parallel_compile_supported;
bool ShaderGLES3::async_hidden_forbidden;
int *ShaderGLES3::compiles_started_this_frame;
int ShaderGLES3::max_simultaneous_compiles;
#ifdef DEBUG_ENABLED
bool ShaderGLES3::log_active_async_compiles_count;
#endif
int ShaderGLES3::active_compiles_count;
uint64_t ShaderGLES3::current_frame;
//#define DEBUG_SHADER
#ifdef DEBUG_SHADER
#define DEBUG_PRINT(m_text) print_line(m_text);
#else
#define DEBUG_PRINT(m_text)
#endif
#define _EXT_COMPLETION_STATUS 0x91B1
GLint ShaderGLES3::get_uniform_location(int p_index) const {
ERR_FAIL_COND_V(!version, -1);
return version->uniform_location[p_index];
}
bool ShaderGLES3::bind() {
return _bind(false);
}
bool ShaderGLES3::_bind(bool p_binding_fallback) {
// Same base shader and version valid version?
if (active == this && version) {
if (new_conditional_version.code_version == conditional_version.code_version) {
if (new_conditional_version.version == conditional_version.version) {
return false;
}
// From ubershader to ubershader of the same code?
if ((conditional_version.version & VersionKey::UBERSHADER_FLAG) && (new_conditional_version.version & VersionKey::UBERSHADER_FLAG)) {
conditional_version.version = new_conditional_version.version;
return false;
}
}
}
bool must_be_ready_now = !is_async_compilation_supported() || p_binding_fallback;
conditional_version = new_conditional_version;
version = get_current_version(must_be_ready_now);
ERR_FAIL_COND_V(!version, false);
bool ready = false;
ready = _process_program_state(version, must_be_ready_now);
if (version->compile_status == Version::COMPILE_STATUS_RESTART_NEEDED) {
get_current_version(must_be_ready_now); // Trigger recompile
ready = _process_program_state(version, must_be_ready_now);
}
#ifdef DEBUG_ENABLED
if (ready) {
if (VS::get_singleton()->is_force_shader_fallbacks_enabled() && !must_be_ready_now) {
ready = false;
}
}
#endif
if (ready) {
glUseProgram(version->ids.main);
if (!version->uniforms_ready) {
_setup_uniforms(custom_code_map.getptr(conditional_version.code_version));
version->uniforms_ready = true;
}
DEBUG_TEST_ERROR("Use Program");
active = this;
return true;
} else if (!must_be_ready_now && version->async_mode == ASYNC_MODE_VISIBLE && !p_binding_fallback && get_ubershader_flags_uniform() != -1) {
// We can and have to fall back to the ubershader
return _bind_ubershader();
} else {
// We have a compile error or must fall back by skipping render
unbind();
return false;
}
}
bool ShaderGLES3::_bind_ubershader() {
#ifdef DEBUG_ENABLED
ERR_FAIL_COND_V(!is_async_compilation_supported(), false);
ERR_FAIL_COND_V(get_ubershader_flags_uniform() == -1, false);
#endif
new_conditional_version.version |= VersionKey::UBERSHADER_FLAG;
bool bound = _bind(true);
int conditionals_uniform = _get_uniform(get_ubershader_flags_uniform());
#ifdef DEBUG_ENABLED
ERR_FAIL_COND_V(conditionals_uniform == -1, false);
#endif
new_conditional_version.version &= ~VersionKey::UBERSHADER_FLAG;
glUniform1i(conditionals_uniform, new_conditional_version.version);
return bound;
}
void ShaderGLES3::advance_async_shaders_compilation() {
SelfList<ShaderGLES3::Version> *curr = versions_compiling.first();
while (curr) {
SelfList<ShaderGLES3::Version> *next = curr->next();
ShaderGLES3::Version *v = curr->self();
// Only if it didn't already have a chance to be processed in this frame
if (v->last_frame_processed != current_frame) {
v->shader->_process_program_state(v, false);
}
curr = next;
}
}
void ShaderGLES3::_log_active_compiles() {
#ifdef DEBUG_ENABLED
if (log_active_async_compiles_count) {
ERR_FAIL_COND(active_compiles_count < 0);
if (parallel_compile_supported) {
print_line("Async. shader compiles: " + itos(active_compiles_count));
} else if (compile_queue) {
print_line("Queued shader compiles: " + itos(active_compiles_count));
} else {
CRASH_NOW();
}
}
#endif
}
bool ShaderGLES3::_process_program_state(Version *p_version, bool p_async_forbidden) {
bool ready = false;
bool run_next_step = true;
while (run_next_step) {
run_next_step = false;
switch (p_version->compile_status) {
case Version::COMPILE_STATUS_OK: {
// Yeaaah!
ready = true;
} break;
case Version::COMPILE_STATUS_ERROR: {
// Sad, but we have to accept it
} break;
case Version::COMPILE_STATUS_PENDING:
case Version::COMPILE_STATUS_RESTART_NEEDED: {
// These lead to nowhere unless other piece of code starts the compile process
} break;
case Version::COMPILE_STATUS_SOURCE_PROVIDED: {
int start_compiles_count = p_async_forbidden ? 2 : 0;
if (!start_compiles_count) {
int free_async_slots = MAX(0, MIN(max_simultaneous_compiles - active_compiles_count, max_simultaneous_compiles - *compiles_started_this_frame));
start_compiles_count = MIN(2, free_async_slots);
}
if (start_compiles_count >= 1) {
glCompileShader(p_version->ids.vert);
if (start_compiles_count == 1) {
p_version->compile_status = Version::COMPILE_STATUS_COMPILING_VERTEX;
} else {
glCompileShader(p_version->ids.frag);
p_version->compile_status = Version::COMPILE_STATUS_COMPILING_VERTEX_AND_FRAGMENT;
}
if (!p_async_forbidden) {
versions_compiling.add_last(&p_version->compiling_list);
// Vertex and fragment shaders take independent compile slots
active_compiles_count += start_compiles_count;
_log_active_compiles();
}
(*compiles_started_this_frame) += start_compiles_count;
run_next_step = p_async_forbidden;
}
} break;
case Version::COMPILE_STATUS_COMPILING_VERTEX: {
bool must_compile_frag_now = p_async_forbidden;
if (!must_compile_frag_now) {
if (active_compiles_count < max_simultaneous_compiles && *compiles_started_this_frame < max_simultaneous_compiles) {
must_compile_frag_now = true;
}
}
if (must_compile_frag_now) {
glCompileShader(p_version->ids.frag);
if (p_version->compiling_list.in_list()) {
active_compiles_count++;
_log_active_compiles();
}
p_version->compile_status = Version::COMPILE_STATUS_COMPILING_VERTEX_AND_FRAGMENT;
} else if (parallel_compile_supported) {
GLint completed = 0;
glGetShaderiv(p_version->ids.vert, _EXT_COMPLETION_STATUS, &completed);
if (completed) {
// Not touching compiles count since the same slot used for vertex is now used for fragment
glCompileShader(p_version->ids.frag);
p_version->compile_status = Version::COMPILE_STATUS_COMPILING_FRAGMENT;
}
}
run_next_step = p_async_forbidden;
} break;
case Version::COMPILE_STATUS_COMPILING_FRAGMENT:
case Version::COMPILE_STATUS_COMPILING_VERTEX_AND_FRAGMENT: {
bool must_complete_now = p_async_forbidden;
if (!must_complete_now && parallel_compile_supported) {
GLint vertex_completed = 0;
if (p_version->compile_status == Version::COMPILE_STATUS_COMPILING_FRAGMENT) {
vertex_completed = true;
} else {
glGetShaderiv(p_version->ids.vert, _EXT_COMPLETION_STATUS, &vertex_completed);
if (p_version->compiling_list.in_list()) {
active_compiles_count--;
_log_active_compiles();
}
p_version->compile_status = Version::COMPILE_STATUS_COMPILING_FRAGMENT;
}
if (vertex_completed) {
GLint frag_completed = 0;
glGetShaderiv(p_version->ids.frag, _EXT_COMPLETION_STATUS, &frag_completed);
if (frag_completed) {
must_complete_now = true;
}
}
}
if (must_complete_now) {
bool must_save_to_cache = p_version->version_key.is_subject_to_caching() && p_version->program_binary.source != Version::ProgramBinary::SOURCE_CACHE && shader_cache;
bool ok = p_version->shader->_complete_compile(p_version->ids, must_save_to_cache);
if (ok) {
p_version->compile_status = Version::COMPILE_STATUS_LINKING;
run_next_step = p_async_forbidden;
} else {
p_version->compile_status = Version::COMPILE_STATUS_ERROR;
if (p_version->compiling_list.in_list()) {
p_version->compiling_list.remove_from_list();
active_compiles_count--;
_log_active_compiles();
}
}
}
} break;
case Version::COMPILE_STATUS_PROCESSING_AT_QUEUE: {
// This is from the async. queue
switch (p_version->program_binary.result_from_queue.get()) {
case -1: { // Error
p_version->compile_status = Version::COMPILE_STATUS_ERROR;
p_version->compiling_list.remove_from_list();
active_compiles_count--;
_log_active_compiles();
} break;
case 0: { // In progress
if (p_async_forbidden) {
OS::get_singleton()->delay_usec(1000);
run_next_step = true;
}
} break;
case 1: { // Complete
p_version->compile_status = Version::COMPILE_STATUS_BINARY_READY;
run_next_step = true;
} break;
}
} break;
case Version::COMPILE_STATUS_BINARY_READY_FROM_CACHE: {
bool eat_binary_now = p_async_forbidden;
if (!eat_binary_now) {
if (active_compiles_count < max_simultaneous_compiles && *compiles_started_this_frame < max_simultaneous_compiles) {
eat_binary_now = true;
}
}
if (eat_binary_now) {
p_version->compile_status = Version::COMPILE_STATUS_BINARY_READY;
run_next_step = true;
if (!p_async_forbidden) {
versions_compiling.add_last(&p_version->compiling_list);
active_compiles_count++;
_log_active_compiles();
(*compiles_started_this_frame)++;
}
}
} break;
case Version::COMPILE_STATUS_BINARY_READY: {
PoolByteArray::Read r = p_version->program_binary.data.read();
glProgramBinary(p_version->ids.main, static_cast<GLenum>(p_version->program_binary.format), r.ptr(), p_version->program_binary.data.size());
p_version->compile_status = Version::COMPILE_STATUS_LINKING;
run_next_step = true;
} break;
case Version::COMPILE_STATUS_LINKING: {
bool must_complete_now = p_async_forbidden || p_version->program_binary.source == Version::ProgramBinary::SOURCE_QUEUE;
if (!must_complete_now && parallel_compile_supported) {
GLint link_completed;
glGetProgramiv(p_version->ids.main, _EXT_COMPLETION_STATUS, &link_completed);
must_complete_now = link_completed;
}
if (must_complete_now) {
bool must_save_to_cache = p_version->version_key.is_subject_to_caching() && p_version->program_binary.source != Version::ProgramBinary::SOURCE_CACHE && shader_cache;
bool ok = false;
if (must_save_to_cache && p_version->program_binary.source == Version::ProgramBinary::SOURCE_LOCAL) {
ok = p_version->shader->_complete_link(p_version->ids, &p_version->program_binary.format, &p_version->program_binary.data);
} else {
ok = p_version->shader->_complete_link(p_version->ids);
#ifdef DEBUG_ENABLED
#if 0
// Simulate GL rejecting program from cache
if (p_version->program_binary.source == Version::ProgramBinary::SOURCE_CACHE) {
ok = false;
}
#endif
#endif
}
if (ok) {
if (must_save_to_cache) {
String &tmp_hash = p_version->program_binary.cache_hash;
GLenum &tmp_format = p_version->program_binary.format;
PoolByteArray &tmp_data = p_version->program_binary.data;
cache_write_queue->enqueue(p_version->ids.main, [=]() {
shader_cache->store(tmp_hash, static_cast<uint32_t>(tmp_format), tmp_data);
});
}
p_version->compile_status = Version::COMPILE_STATUS_OK;
ready = true;
} else {
if (p_version->program_binary.source == Version::ProgramBinary::SOURCE_CACHE) {
#ifdef DEBUG_ENABLED
WARN_PRINT("Program binary from cache has been rejected by the GL. Removing from cache.");
#endif
shader_cache->remove(p_version->program_binary.cache_hash);
p_version->compile_status = Version::COMPILE_STATUS_RESTART_NEEDED;
} else {
if (p_version->program_binary.source == Version::ProgramBinary::SOURCE_QUEUE) {
ERR_PRINT("Program binary from compile queue has been rejected by the GL. Bug?");
}
p_version->compile_status = Version::COMPILE_STATUS_ERROR;
}
}
p_version->program_binary.data = PoolByteArray();
p_version->program_binary.cache_hash.clear();
if (p_version->compiling_list.in_list()) {
p_version->compiling_list.remove_from_list();
active_compiles_count--;
_log_active_compiles();
}
}
} break;
}
}
return ready;
}
void ShaderGLES3::unbind() {
version = nullptr;
glUseProgram(0);
active = nullptr;
}
static void _display_error_with_code(const String &p_error, GLuint p_shader_id) {
int line = 1;
GLint source_len;
glGetShaderiv(p_shader_id, GL_SHADER_SOURCE_LENGTH, &source_len);
LocalVector<GLchar> source_buffer;
source_buffer.resize(source_len);
glGetShaderSource(p_shader_id, source_len, NULL, source_buffer.ptr());
String total_code(source_buffer.ptr());
Vector<String> lines = String(total_code).split("\n");
for (int j = 0; j < lines.size(); j++) {
print_line(vformat("%4d | %s", line, lines[j]));
line++;
}
ERR_PRINT(p_error);
}
static CharString _prepare_ubershader_chunk(const CharString &p_chunk) {
String s(p_chunk.get_data());
Vector<String> lines = s.split("\n");
s.clear();
for (int i = 0; i < lines.size(); ++i) {
if (lines[i].ends_with("//ubershader-skip")) {
continue;
} else if (lines[i].ends_with("//ubershader-runtime")) {
// Move from the preprocessor world to the true code realm
String l = lines[i].trim_suffix("//ubershader-runtime").strip_edges();
{
// Ignore other comments
Vector<String> pieces = l.split("//");
l = pieces[0].strip_edges();
}
if (l == "#else") {
s += "} else {\n";
} else if (l == "#endif") {
s += "}\n";
} else if (l.begins_with("#ifdef")) {
Vector<String> pieces = l.split_spaces();
CRASH_COND(pieces.size() != 2);
s += "if ((ubershader_flags & FLAG_" + pieces[1] + ") != 0) {\n";
} else if (l.begins_with("#ifndef")) {
Vector<String> pieces = l.split_spaces();
CRASH_COND(pieces.size() != 2);
s += "if ((ubershader_flags & FLAG_" + pieces[1] + ") == 0) {\n";
} else {
CRASH_NOW_MSG("The shader template is using too complex syntax in a line marked with ubershader-runtime.");
}
continue;
}
s += lines[i] + "\n";
}
return s.ascii();
}
// Possible source-status pairs after this:
// Local - Source provided
// Queue - Processing / Binary ready / Error
// Cache - Binary ready
ShaderGLES3::Version *ShaderGLES3::get_current_version(bool &r_async_forbidden) {
VersionKey effective_version;
effective_version.key = conditional_version.key;
// Store and look up ubershader with all other version bits set to zero
if ((conditional_version.version & VersionKey::UBERSHADER_FLAG)) {
effective_version.version = VersionKey::UBERSHADER_FLAG;
}
Version *_v = version_map.getptr(effective_version);
CustomCode *cc = nullptr;
if (_v) {
if (_v->compile_status == Version::COMPILE_STATUS_RESTART_NEEDED) {
_v->program_binary.source = Version::ProgramBinary::SOURCE_NONE;
} else {
if (effective_version.code_version != 0) {
cc = custom_code_map.getptr(effective_version.code_version);
ERR_FAIL_COND_V(!cc, _v);
if (cc->version == _v->code_version) {
return _v;
}
} else {
return _v;
}
}
}
if (!_v) {
_v = &version_map[effective_version];
_v->version_key = effective_version;
_v->shader = this;
_v->uniform_location = memnew_arr(GLint, uniform_count);
}
Version &v = *_v;
/* SETUP CONDITIONALS */
LocalVector<const char *> strings_common;
#ifdef GLES_OVER_GL
strings_common.push_back("#version 330\n");
strings_common.push_back("#define GLES_OVER_GL\n");
#else
strings_common.push_back("#version 300 es\n");
#endif
#ifdef ANDROID_ENABLED
strings_common.push_back("#define ANDROID_ENABLED\n");
#endif
for (int i = 0; i < custom_defines.size(); i++) {
strings_common.push_back(custom_defines[i].get_data());
strings_common.push_back("\n");
}
LocalVector<CharString> flag_macros;
bool build_ubershader = get_ubershader_flags_uniform() != -1 && (effective_version.version & VersionKey::UBERSHADER_FLAG);
if (build_ubershader) {
strings_common.push_back("#define IS_UBERSHADER\n");
for (int i = 0; i < conditional_count; i++) {
String s = vformat("#define FLAG_%s (1 << %d)\n", String(conditional_defines[i]).strip_edges().trim_prefix("#define "), i);
CharString cs = s.ascii();
flag_macros.push_back(cs);
strings_common.push_back(cs.ptr());
}
strings_common.push_back("\n");
} else {
for (int i = 0; i < conditional_count; i++) {
bool enable = ((1 << i) & effective_version.version);
strings_common.push_back(enable ? conditional_defines[i] : "");
if (enable) {
DEBUG_PRINT(conditional_defines[i]);
}
}
}
//keep them around during the function
struct {
CharString code_string;
CharString code_globals;
CharString material_string;
} vert;
struct {
CharString code_string;
CharString code_string2;
CharString code_globals;
CharString material_string;
} frag;
if (effective_version.code_version != 0) {
ERR_FAIL_COND_V(!custom_code_map.has(effective_version.code_version), nullptr);
if (!cc) {
cc = &custom_code_map[effective_version.code_version];
}
if (cc->version != v.code_version) {
v.code_version = cc->version;
v.async_mode = cc->async_mode;
v.uniforms_ready = false;
}
}
/* CREATE PROGRAM */
v.ids.main = glCreateProgram();
ERR_FAIL_COND_V(v.ids.main == 0, nullptr);
// To create the ubershader we need to modify the static strings;
// they'll go in this array
LocalVector<CharString> filtered_strings;
/* VERTEX SHADER */
if (cc) {
for (int i = 0; i < cc->custom_defines.size(); i++) {
strings_common.push_back(cc->custom_defines[i].get_data());
DEBUG_PRINT("CD #" + itos(i) + ": " + String(cc->custom_defines[i]));
}
}
LocalVector<const char *> strings_vertex(strings_common);
//vertex precision is high
strings_vertex.push_back("precision highp float;\n");
strings_vertex.push_back("precision highp int;\n");
#ifndef GLES_OVER_GL
strings_vertex.push_back("precision highp sampler2D;\n");
strings_vertex.push_back("precision highp samplerCube;\n");
strings_vertex.push_back("precision highp sampler2DArray;\n");
#endif
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(vertex_code0);
filtered_strings.push_back(s);
strings_vertex.push_back(s.get_data());
} else {
strings_vertex.push_back(vertex_code0.get_data());
}
if (cc) {
vert.material_string = cc->uniforms.ascii();
strings_vertex.push_back(vert.material_string.get_data());
}
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(vertex_code1);
filtered_strings.push_back(s);
strings_vertex.push_back(s.get_data());
} else {
strings_vertex.push_back(vertex_code1.get_data());
}
if (cc) {
vert.code_globals = cc->vertex_globals.ascii();
strings_vertex.push_back(vert.code_globals.get_data());
}
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(vertex_code2);
filtered_strings.push_back(s);
strings_vertex.push_back(s.get_data());
} else {
strings_vertex.push_back(vertex_code2.get_data());
}
if (cc) {
vert.code_string = cc->vertex.ascii();
strings_vertex.push_back(vert.code_string.get_data());
}
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(vertex_code3);
filtered_strings.push_back(s);
strings_vertex.push_back(s.get_data());
} else {
strings_vertex.push_back(vertex_code3.get_data());
}
#ifdef DEBUG_SHADER
DEBUG_PRINT("\nVertex Code:\n\n" + String(code_string.get_data()));
for (int i = 0; i < strings_vertex.size(); i++) {
//print_line("vert strings "+itos(i)+":"+String(strings_vertex[i]));
}
#endif
/* FRAGMENT SHADER */
LocalVector<const char *> strings_fragment(strings_common);
//fragment precision is medium
strings_fragment.push_back("precision highp float;\n");
strings_fragment.push_back("precision highp int;\n");
#ifndef GLES_OVER_GL
strings_fragment.push_back("precision highp sampler2D;\n");
strings_fragment.push_back("precision highp samplerCube;\n");
strings_fragment.push_back("precision highp sampler2DArray;\n");
#endif
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(fragment_code0);
filtered_strings.push_back(s);
strings_fragment.push_back(s.get_data());
} else {
strings_fragment.push_back(fragment_code0.get_data());
}
if (cc) {
frag.material_string = cc->uniforms.ascii();
strings_fragment.push_back(frag.material_string.get_data());
}
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(fragment_code1);
filtered_strings.push_back(s);
strings_fragment.push_back(s.get_data());
} else {
strings_fragment.push_back(fragment_code1.get_data());
}
if (cc) {
frag.code_globals = cc->fragment_globals.ascii();
strings_fragment.push_back(frag.code_globals.get_data());
}
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(fragment_code2);
filtered_strings.push_back(s);
strings_fragment.push_back(s.get_data());
} else {
strings_fragment.push_back(fragment_code2.get_data());
}
if (cc) {
frag.code_string = cc->light.ascii();
strings_fragment.push_back(frag.code_string.get_data());
}
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(fragment_code3);
filtered_strings.push_back(s);
strings_fragment.push_back(s.get_data());
} else {
strings_fragment.push_back(fragment_code3.get_data());
}
if (cc) {
frag.code_string2 = cc->fragment.ascii();
strings_fragment.push_back(frag.code_string2.get_data());
}
if (build_ubershader) {
CharString s = _prepare_ubershader_chunk(fragment_code4);
filtered_strings.push_back(s);
strings_fragment.push_back(s.get_data());
} else {
strings_fragment.push_back(fragment_code4.get_data());
}
#ifdef DEBUG_SHADER
DEBUG_PRINT("\nFragment Globals:\n\n" + String(code_globals.get_data()));
DEBUG_PRINT("\nFragment Code:\n\n" + String(code_string2.get_data()));
for (int i = 0; i < strings_fragment.size(); i++) {
//print_line("frag strings "+itos(i)+":"+String(strings_fragment[i]));
}
#endif
if (!r_async_forbidden) {
r_async_forbidden =
(v.async_mode == ASYNC_MODE_HIDDEN && async_hidden_forbidden) ||
(v.async_mode == ASYNC_MODE_VISIBLE && get_ubershader_flags_uniform() == -1);
}
bool in_cache = false;
if (shader_cache && effective_version.is_subject_to_caching()) {
const char *strings_platform[] = {
reinterpret_cast<const char *>(glGetString(GL_VENDOR)),
reinterpret_cast<const char *>(glGetString(GL_RENDERER)),
reinterpret_cast<const char *>(glGetString(GL_VERSION)),
nullptr,
};
v.program_binary.cache_hash = ShaderCacheGLES3::hash_program(strings_platform, strings_vertex, strings_fragment);
if (shader_cache->retrieve(v.program_binary.cache_hash, &v.program_binary.format, &v.program_binary.data)) {
in_cache = true;
v.program_binary.source = Version::ProgramBinary::SOURCE_CACHE;
v.compile_status = Version::COMPILE_STATUS_BINARY_READY_FROM_CACHE;
}
}
if (!in_cache) {
if (compile_queue && !r_async_forbidden) {
// Asynchronous compilation via queue (secondary context)
// Remarks:
// 1. We need to save vertex and fragment strings because they will not live beyond this function.
// 2. We'll create another program since the other GL context is not shared.
// We are doing it that way since GL drivers can implement context sharing via locking, which
// would render (no pun intended) this whole effort to asynchronous useless.
auto concat_shader_strings = [](const LocalVector<const char *> &p_shader_strings, LocalVector<char> *r_out) {
r_out->clear();
for (uint32_t i = 0; i < p_shader_strings.size(); i++) {
uint32_t initial_size = r_out->size();
uint32_t piece_len = strlen(reinterpret_cast<const char *>(p_shader_strings[i]));
r_out->resize(initial_size + piece_len + 1);
memcpy(r_out->ptr() + initial_size, p_shader_strings[i], piece_len);
*(r_out->ptr() + initial_size + piece_len) = '\n';
}
*(r_out->ptr() + r_out->size() - 1) = '\0';
};
LocalVector<char> vertex_code;
concat_shader_strings(strings_vertex, &vertex_code);
LocalVector<char> fragment_code;
concat_shader_strings(strings_fragment, &fragment_code);
v.program_binary.source = Version::ProgramBinary::SOURCE_QUEUE;
v.compile_status = Version::COMPILE_STATUS_PROCESSING_AT_QUEUE;
versions_compiling.add_last(&v.compiling_list);
active_compiles_count++;
_log_active_compiles();
(*compiles_started_this_frame)++;
compile_queue->enqueue(v.ids.main, [this, &v, vertex_code, fragment_code]() {
Version::Ids async_ids;
async_ids.main = glCreateProgram();
async_ids.vert = glCreateShader(GL_VERTEX_SHADER);
async_ids.frag = glCreateShader(GL_FRAGMENT_SHADER);
LocalVector<const char *> async_strings_vertex;
async_strings_vertex.push_back(vertex_code.ptr());
LocalVector<const char *> async_strings_fragment;
async_strings_fragment.push_back(fragment_code.ptr());
_set_source(async_ids, async_strings_vertex, async_strings_fragment);
glCompileShader(async_ids.vert);
glCompileShader(async_ids.frag);
if (_complete_compile(async_ids, true) && _complete_link(async_ids, &v.program_binary.format, &v.program_binary.data)) {
glDeleteShader(async_ids.frag);
glDeleteShader(async_ids.vert);
glDeleteProgram(async_ids.main);
v.program_binary.result_from_queue.set(1);
} else {
v.program_binary.result_from_queue.set(0);
}
});
} else {
// Synchronous compilation, or async. via native support
v.ids.vert = glCreateShader(GL_VERTEX_SHADER);
v.ids.frag = glCreateShader(GL_FRAGMENT_SHADER);
_set_source(v.ids, strings_vertex, strings_fragment);
v.program_binary.source = Version::ProgramBinary::SOURCE_LOCAL;
v.compile_status = Version::COMPILE_STATUS_SOURCE_PROVIDED;
}
}
if (cc) {
cc->versions.insert(effective_version.version);
}
return &v;
}
void ShaderGLES3::_set_source(Version::Ids p_ids, const LocalVector<const char *> &p_vertex_strings, const LocalVector<const char *> &p_fragment_strings) const {
glShaderSource(p_ids.vert, p_vertex_strings.size(), p_vertex_strings.ptr(), nullptr);
glShaderSource(p_ids.frag, p_fragment_strings.size(), p_fragment_strings.ptr(), nullptr);
}
bool ShaderGLES3::_complete_compile(Version::Ids p_ids, bool p_retrievable) const {
GLint status;
glGetShaderiv(p_ids.vert, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE) {
// error compiling
GLsizei iloglen;
glGetShaderiv(p_ids.vert, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(p_ids.frag);
glDeleteShader(p_ids.vert);
glDeleteProgram(p_ids.main);
ERR_PRINT("Vertex shader compilation failed with empty log");
} else {
if (iloglen == 0) {
iloglen = 4096; //buggy driver (Adreno 220+....)
}
char *ilogmem = (char *)memalloc(iloglen + 1);
ilogmem[iloglen] = 0;
glGetShaderInfoLog(p_ids.vert, iloglen, &iloglen, ilogmem);
String err_string = get_shader_name() + ": Vertex Program Compilation Failed:\n";
err_string += ilogmem;
_display_error_with_code(err_string, p_ids.vert);
ERR_PRINT(err_string.ascii().get_data());
memfree(ilogmem);
glDeleteShader(p_ids.frag);
glDeleteShader(p_ids.vert);
glDeleteProgram(p_ids.main);
}
return false;
}
glGetShaderiv(p_ids.frag, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE) {
// error compiling
GLsizei iloglen;
glGetShaderiv(p_ids.frag, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(p_ids.frag);
glDeleteShader(p_ids.vert);
glDeleteProgram(p_ids.main);
ERR_PRINT("Fragment shader compilation failed with empty log");
} else {
if (iloglen == 0) {
iloglen = 4096; //buggy driver (Adreno 220+....)
}
char *ilogmem = (char *)memalloc(iloglen + 1);
ilogmem[iloglen] = 0;
glGetShaderInfoLog(p_ids.frag, iloglen, &iloglen, ilogmem);
String err_string = get_shader_name() + ": Fragment Program Compilation Failed:\n";
err_string += ilogmem;
_display_error_with_code(err_string, p_ids.frag);
ERR_PRINT(err_string.ascii().get_data());
memfree(ilogmem);
glDeleteShader(p_ids.frag);
glDeleteShader(p_ids.vert);
glDeleteProgram(p_ids.main);
}
return false;
}
glAttachShader(p_ids.main, p_ids.frag);
glAttachShader(p_ids.main, p_ids.vert);
// bind attributes before linking
for (int i = 0; i < attribute_pair_count; i++) {
glBindAttribLocation(p_ids.main, attribute_pairs[i].index, attribute_pairs[i].name);
}
//if feedback exists, set it up
if (feedback_count) {
Vector<const char *> feedback;
for (int i = 0; i < feedback_count; i++) {
if (feedbacks[i].conditional == -1 || (1 << feedbacks[i].conditional) & conditional_version.version) {
//conditional for this feedback is enabled
feedback.push_back(feedbacks[i].name);
}
}
if (feedback.size()) {
glTransformFeedbackVaryings(p_ids.main, feedback.size(), feedback.ptr(), GL_INTERLEAVED_ATTRIBS);
}
}
if (p_retrievable) {
glProgramParameteri(p_ids.main, GL_PROGRAM_BINARY_RETRIEVABLE_HINT, GL_TRUE);
}
glLinkProgram(p_ids.main);
return true;
}
bool ShaderGLES3::_complete_link(Version::Ids p_ids, GLenum *r_program_format, PoolByteArray *r_program_binary) const {
GLint status;
glGetProgramiv(p_ids.main, GL_LINK_STATUS, &status);
if (status == GL_FALSE) {
// error linking
GLsizei iloglen;
glGetProgramiv(p_ids.main, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(p_ids.frag);
glDeleteShader(p_ids.vert);
glDeleteProgram(p_ids.main);
ERR_FAIL_COND_V(iloglen < 0, false);
}
if (iloglen == 0) {
iloglen = 4096; //buggy driver (Adreno 220+....)
}
char *ilogmem = (char *)Memory::alloc_static(iloglen + 1);
ilogmem[iloglen] = 0;
glGetProgramInfoLog(p_ids.main, iloglen, &iloglen, ilogmem);
String err_string = get_shader_name() + ": Program LINK FAILED:\n";
err_string += ilogmem;
ERR_PRINT(err_string.ascii().get_data());
Memory::free_static(ilogmem);
glDeleteShader(p_ids.frag);
glDeleteShader(p_ids.vert);
glDeleteProgram(p_ids.main);
return false;
}
if (r_program_binary) {
GLint program_len;
glGetProgramiv(p_ids.main, GL_PROGRAM_BINARY_LENGTH, &program_len);
r_program_binary->resize(program_len);
PoolByteArray::Write w = r_program_binary->write();
glGetProgramBinary(p_ids.main, program_len, NULL, r_program_format, w.ptr());
}
return true;
}
void ShaderGLES3::_setup_uniforms(CustomCode *p_cc) const {
//print_line("uniforms: ");
for (int j = 0; j < uniform_count; j++) {
version->uniform_location[j] = glGetUniformLocation(version->ids.main, uniform_names[j]);
//print_line("uniform "+String(uniform_names[j])+" location "+itos(version->uniform_location[j]));
}
// set texture uniforms
for (int i = 0; i < texunit_pair_count; i++) {
GLint loc = glGetUniformLocation(version->ids.main, texunit_pairs[i].name);
if (loc >= 0) {
if (texunit_pairs[i].index < 0) {
glUniform1i(loc, max_image_units + texunit_pairs[i].index); //negative, goes down
} else {
glUniform1i(loc, texunit_pairs[i].index);
}
}
}
// assign uniform block bind points
for (int i = 0; i < ubo_count; i++) {
GLint loc = glGetUniformBlockIndex(version->ids.main, ubo_pairs[i].name);
if (loc >= 0)
glUniformBlockBinding(version->ids.main, loc, ubo_pairs[i].index);
}
if (p_cc) {
version->texture_uniform_locations.resize(p_cc->texture_uniforms.size());
for (int i = 0; i < p_cc->texture_uniforms.size(); i++) {
version->texture_uniform_locations.write[i] = glGetUniformLocation(version->ids.main, String(p_cc->texture_uniforms[i]).ascii().get_data());
glUniform1i(version->texture_uniform_locations[i], i + base_material_tex_index);
}
}
}
void ShaderGLES3::_dispose_program(Version *p_version) {
if (compile_queue) {
if (p_version->compile_status == Version::COMPILE_STATUS_PROCESSING_AT_QUEUE) {
compile_queue->cancel(p_version->ids.main);
}
}
glDeleteShader(p_version->ids.vert);
glDeleteShader(p_version->ids.frag);
glDeleteProgram(p_version->ids.main);
if (p_version->compiling_list.in_list()) {
p_version->compiling_list.remove_from_list();
active_compiles_count--;
if (p_version->compile_status == Version::COMPILE_STATUS_COMPILING_VERTEX_AND_FRAGMENT) {
active_compiles_count--;
}
_log_active_compiles();
}
p_version->compile_status = Version::COMPILE_STATUS_ERROR;
ERR_FAIL_COND(active_compiles_count < 0);
}
GLint ShaderGLES3::get_uniform_location(const String &p_name) const {
ERR_FAIL_COND_V(!version, -1);
return glGetUniformLocation(version->ids.main, p_name.ascii().get_data());
}
void ShaderGLES3::setup(const char **p_conditional_defines, int p_conditional_count, const char **p_uniform_names, int p_uniform_count, const AttributePair *p_attribute_pairs, int p_attribute_count, const TexUnitPair *p_texunit_pairs, int p_texunit_pair_count, const UBOPair *p_ubo_pairs, int p_ubo_pair_count, const Feedback *p_feedback, int p_feedback_count, const char *p_vertex_code, const char *p_fragment_code, int p_vertex_code_start, int p_fragment_code_start) {
ERR_FAIL_COND(version);
conditional_version.key = 0;
new_conditional_version.key = 0;
uniform_count = p_uniform_count;
conditional_count = p_conditional_count;
conditional_defines = p_conditional_defines;
uniform_names = p_uniform_names;
vertex_code = p_vertex_code;
fragment_code = p_fragment_code;
texunit_pairs = p_texunit_pairs;
texunit_pair_count = p_texunit_pair_count;
vertex_code_start = p_vertex_code_start;
fragment_code_start = p_fragment_code_start;
attribute_pairs = p_attribute_pairs;
attribute_pair_count = p_attribute_count;
ubo_pairs = p_ubo_pairs;
ubo_count = p_ubo_pair_count;
feedbacks = p_feedback;
feedback_count = p_feedback_count;
//split vertex and shader code (thank you, shader compiler programmers from you know what company).
{
String globals_tag = "\nVERTEX_SHADER_GLOBALS";
String material_tag = "\nMATERIAL_UNIFORMS";
String code_tag = "\nVERTEX_SHADER_CODE";
String code = vertex_code;
int cpos = code.find(material_tag);
if (cpos == -1) {
vertex_code0 = code.ascii();
} else {
vertex_code0 = code.substr(0, cpos).ascii();
code = code.substr(cpos + material_tag.length(), code.length());
cpos = code.find(globals_tag);
if (cpos == -1) {
vertex_code1 = code.ascii();
} else {
vertex_code1 = code.substr(0, cpos).ascii();
String code2 = code.substr(cpos + globals_tag.length(), code.length());
cpos = code2.find(code_tag);
if (cpos == -1) {
vertex_code2 = code2.ascii();
} else {
vertex_code2 = code2.substr(0, cpos).ascii();
vertex_code3 = code2.substr(cpos + code_tag.length(), code2.length()).ascii();
}
}
}
}
{
String globals_tag = "\nFRAGMENT_SHADER_GLOBALS";
String material_tag = "\nMATERIAL_UNIFORMS";
String code_tag = "\nFRAGMENT_SHADER_CODE";
String light_code_tag = "\nLIGHT_SHADER_CODE";
String code = fragment_code;
int cpos = code.find(material_tag);
if (cpos == -1) {
fragment_code0 = code.ascii();
} else {
fragment_code0 = code.substr(0, cpos).ascii();
//print_line("CODE0:\n"+String(fragment_code0.get_data()));
code = code.substr(cpos + material_tag.length(), code.length());
cpos = code.find(globals_tag);
if (cpos == -1) {
fragment_code1 = code.ascii();
} else {
fragment_code1 = code.substr(0, cpos).ascii();
//print_line("CODE1:\n"+String(fragment_code1.get_data()));
String code2 = code.substr(cpos + globals_tag.length(), code.length());
cpos = code2.find(light_code_tag);
if (cpos == -1) {
fragment_code2 = code2.ascii();
} else {
fragment_code2 = code2.substr(0, cpos).ascii();
//print_line("CODE2:\n"+String(fragment_code2.get_data()));
String code3 = code2.substr(cpos + light_code_tag.length(), code2.length());
cpos = code3.find(code_tag);
if (cpos == -1) {
fragment_code3 = code3.ascii();
} else {
fragment_code3 = code3.substr(0, cpos).ascii();
//print_line("CODE3:\n"+String(fragment_code3.get_data()));
fragment_code4 = code3.substr(cpos + code_tag.length(), code3.length()).ascii();
//print_line("CODE4:\n"+String(fragment_code4.get_data()));
}
}
}
}
}
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_image_units);
}
void ShaderGLES3::init_async_compilation() {
if (is_async_compilation_supported() && get_ubershader_flags_uniform() != -1) {
// Warm up the ubershader for the case of no custom code
new_conditional_version.code_version = 0;
_bind_ubershader();
}
}
bool ShaderGLES3::is_async_compilation_supported() {
return max_simultaneous_compiles > 0 && (compile_queue || parallel_compile_supported);
}
void ShaderGLES3::finish() {
const VersionKey *V = nullptr;
while ((V = version_map.next(V))) {
Version &v = version_map[*V];
_dispose_program(&v);
memdelete_arr(v.uniform_location);
}
ERR_FAIL_COND(versions_compiling.first());
ERR_FAIL_COND(active_compiles_count != 0);
}
void ShaderGLES3::clear_caches() {
const VersionKey *V = nullptr;
while ((V = version_map.next(V))) {
Version &v = version_map[*V];
_dispose_program(&v);
memdelete_arr(v.uniform_location);
}
ERR_FAIL_COND(versions_compiling.first());
ERR_FAIL_COND(active_compiles_count != 0);
version_map.clear();
custom_code_map.clear();
version = nullptr;
last_custom_code = 1;
}
uint32_t ShaderGLES3::create_custom_shader() {
custom_code_map[last_custom_code] = CustomCode();
custom_code_map[last_custom_code].version = 1;
return last_custom_code++;
}
void ShaderGLES3::set_custom_shader_code(uint32_t p_code_id, const String &p_vertex, const String &p_vertex_globals, const String &p_fragment, const String &p_light, const String &p_fragment_globals, const String &p_uniforms, const Vector<StringName> &p_texture_uniforms, const Vector<CharString> &p_custom_defines, AsyncMode p_async_mode) {
ERR_FAIL_COND(!custom_code_map.has(p_code_id));
CustomCode *cc = &custom_code_map[p_code_id];
cc->vertex = p_vertex;
cc->vertex_globals = p_vertex_globals;
cc->fragment = p_fragment;
cc->fragment_globals = p_fragment_globals;
cc->light = p_light;
cc->texture_uniforms = p_texture_uniforms;
cc->uniforms = p_uniforms;
cc->custom_defines = p_custom_defines;
cc->async_mode = p_async_mode;
cc->version++;
if (p_async_mode == ASYNC_MODE_VISIBLE && is_async_compilation_supported() && get_ubershader_flags_uniform() != -1) {
// Warm up the ubershader for this custom code
new_conditional_version.code_version = p_code_id;
_bind_ubershader();
}
}
void ShaderGLES3::set_custom_shader(uint32_t p_code_id) {
new_conditional_version.code_version = p_code_id;
}
void ShaderGLES3::free_custom_shader(uint32_t p_code_id) {
ERR_FAIL_COND(!custom_code_map.has(p_code_id));
if (conditional_version.code_version == p_code_id) {
conditional_version.code_version = 0; //do not keep using a version that is going away
unbind();
}
VersionKey key;
key.code_version = p_code_id;
for (Set<uint32_t>::Element *E = custom_code_map[p_code_id].versions.front(); E; E = E->next()) {
key.version = E->get();
ERR_CONTINUE(!version_map.has(key));
Version &v = version_map[key];
_dispose_program(&v);
memdelete_arr(v.uniform_location);
version_map.erase(key);
}
custom_code_map.erase(p_code_id);
}
void ShaderGLES3::set_base_material_tex_index(int p_idx) {
base_material_tex_index = p_idx;
}
ShaderGLES3::ShaderGLES3() {
version = nullptr;
last_custom_code = 1;
base_material_tex_index = 0;
}
ShaderGLES3::~ShaderGLES3() {
finish();
}
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