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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) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 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"
#ifdef GLES3_ENABLED
#include "core/io/compression.h"
#include "core/io/dir_access.h"
#include "core/io/file_access.h"
void ShaderGLES3::_add_stage(const char *p_code, StageType p_stage_type) {
Vector<String> lines = String(p_code).split("\n");
String text;
for (int i = 0; i < lines.size(); i++) {
String l = lines[i];
bool push_chunk = false;
StageTemplate::Chunk chunk;
if (l.begins_with("#GLOBALS")) {
switch (p_stage_type) {
case STAGE_TYPE_VERTEX:
chunk.type = StageTemplate::Chunk::TYPE_VERTEX_GLOBALS;
break;
case STAGE_TYPE_FRAGMENT:
chunk.type = StageTemplate::Chunk::TYPE_FRAGMENT_GLOBALS;
break;
default: {
}
}
push_chunk = true;
} else if (l.begins_with("#MATERIAL_UNIFORMS")) {
chunk.type = StageTemplate::Chunk::TYPE_MATERIAL_UNIFORMS;
push_chunk = true;
} else if (l.begins_with("#CODE")) {
chunk.type = StageTemplate::Chunk::TYPE_CODE;
push_chunk = true;
chunk.code = l.replace_first("#CODE", String()).replace(":", "").strip_edges().to_upper();
} else {
text += l + "\n";
}
if (push_chunk) {
if (text != String()) {
StageTemplate::Chunk text_chunk;
text_chunk.type = StageTemplate::Chunk::TYPE_TEXT;
text_chunk.text = text.utf8();
stage_templates[p_stage_type].chunks.push_back(text_chunk);
text = String();
}
stage_templates[p_stage_type].chunks.push_back(chunk);
}
if (text != String()) {
StageTemplate::Chunk text_chunk;
text_chunk.type = StageTemplate::Chunk::TYPE_TEXT;
text_chunk.text = text.utf8();
stage_templates[p_stage_type].chunks.push_back(text_chunk);
text = String();
}
}
}
void ShaderGLES3::_setup(const char *p_vertex_code, const char *p_fragment_code, const char *p_name, int p_uniform_count, const char **p_uniform_names, int p_ubo_count, const UBOPair *p_ubos, int p_texture_count, const TexUnitPair *p_tex_units, int p_specialization_count, const Specialization *p_specializations, int p_variant_count, const char **p_variants) {
name = p_name;
if (p_vertex_code) {
_add_stage(p_vertex_code, STAGE_TYPE_VERTEX);
}
if (p_fragment_code) {
_add_stage(p_fragment_code, STAGE_TYPE_FRAGMENT);
}
uniform_names = p_uniform_names;
uniform_count = p_uniform_count;
ubo_pairs = p_ubos;
ubo_count = p_ubo_count;
texunit_pairs = p_tex_units;
texunit_pair_count = p_texture_count;
specializations = p_specializations;
specialization_count = p_specialization_count;
specialization_default_mask = 0;
for (int i = 0; i < specialization_count; i++) {
if (specializations[i].default_value) {
specialization_default_mask |= (uint64_t(1) << uint64_t(i));
}
}
variant_defines = p_variants;
variant_count = p_variant_count;
StringBuilder tohash;
/*
tohash.append("[SpirvCacheKey]");
tohash.append(RenderingDevice::get_singleton()->shader_get_spirv_cache_key());
tohash.append("[BinaryCacheKey]");
tohash.append(RenderingDevice::get_singleton()->shader_get_binary_cache_key());
*/
tohash.append("[Vertex]");
tohash.append(p_vertex_code ? p_vertex_code : "");
tohash.append("[Fragment]");
tohash.append(p_fragment_code ? p_fragment_code : "");
base_sha256 = tohash.as_string().sha256_text();
}
RID ShaderGLES3::version_create() {
//initialize() was never called
ERR_FAIL_COND_V(variant_count == 0, RID());
Version version;
return version_owner.make_rid(version);
}
void ShaderGLES3::_build_variant_code(StringBuilder &builder, uint32_t p_variant, const Version *p_version, const StageTemplate &p_template, uint64_t p_specialization) {
#ifdef GLES_OVER_GL
builder.append("#version 330\n");
builder.append("#define USE_GLES_OVER_GL\n");
#else
builder.append("#version 300 es\n");
#endif
for (int i = 0; i < specialization_count; i++) {
if (p_specialization & (uint64_t(1) << uint64_t(i))) {
builder.append("#define " + String(specializations[i].name) + "\n");
}
}
if (p_version->uniforms.size()) {
builder.append("#define MATERIAL_UNIFORMS_USED\n");
}
for (const KeyValue<StringName, CharString> &E : p_version->code_sections) {
builder.append(String("#define ") + String(E.key) + "_CODE_USED\n");
}
builder.append("\n"); //make sure defines begin at newline
builder.append(general_defines.get_data());
builder.append(variant_defines[p_variant]);
builder.append("\n");
for (int j = 0; j < p_version->custom_defines.size(); j++) {
builder.append(p_version->custom_defines[j].get_data());
}
builder.append("\n"); //make sure defines begin at newline
// Default to highp precision unless specified otherwise.
builder.append("precision highp float;\n");
builder.append("precision highp int;\n");
#ifndef GLES_OVER_GL
builder.append("precision highp sampler2D;\n");
builder.append("precision highp samplerCube;\n");
builder.append("precision highp sampler2DArray;\n");
#endif
for (uint32_t i = 0; i < p_template.chunks.size(); i++) {
const StageTemplate::Chunk &chunk = p_template.chunks[i];
switch (chunk.type) {
case StageTemplate::Chunk::TYPE_MATERIAL_UNIFORMS: {
builder.append(p_version->uniforms.get_data()); //uniforms (same for vertex and fragment)
} break;
case StageTemplate::Chunk::TYPE_VERTEX_GLOBALS: {
builder.append(p_version->vertex_globals.get_data()); // vertex globals
} break;
case StageTemplate::Chunk::TYPE_FRAGMENT_GLOBALS: {
builder.append(p_version->fragment_globals.get_data()); // fragment globals
} break;
case StageTemplate::Chunk::TYPE_CODE: {
if (p_version->code_sections.has(chunk.code)) {
builder.append(p_version->code_sections[chunk.code].get_data());
}
} break;
case StageTemplate::Chunk::TYPE_TEXT: {
builder.append(chunk.text.get_data());
} break;
}
}
}
static void _display_error_with_code(const String &p_error, const String &p_code) {
int line = 1;
Vector<String> lines = p_code.split("\n");
for (int j = 0; j < lines.size(); j++) {
print_line(itos(line) + ": " + lines[j]);
line++;
}
ERR_PRINT(p_error);
}
void ShaderGLES3::_compile_specialization(Version::Specialization &spec, uint32_t p_variant, Version *p_version, uint64_t p_specialization) {
spec.id = glCreateProgram();
spec.ok = false;
GLint status;
//vertex stage
{
StringBuilder builder;
_build_variant_code(builder, p_variant, p_version, stage_templates[STAGE_TYPE_VERTEX], p_specialization);
spec.vert_id = glCreateShader(GL_VERTEX_SHADER);
String builder_string = builder.as_string();
CharString cs = builder_string.utf8();
const char *cstr = cs.ptr();
glShaderSource(spec.vert_id, 1, &cstr, nullptr);
glCompileShader(spec.vert_id);
glGetShaderiv(spec.vert_id, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE) {
GLsizei iloglen;
glGetShaderiv(spec.vert_id, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(spec.vert_id);
glDeleteProgram(spec.id);
spec.id = 0;
ERR_PRINT("No OpenGL vertex shader compiler log.");
} else {
if (iloglen == 0) {
iloglen = 4096; // buggy driver (Adreno 220+)
}
char *ilogmem = (char *)Memory::alloc_static(iloglen + 1);
ilogmem[iloglen] = '\0';
glGetShaderInfoLog(spec.vert_id, iloglen, &iloglen, ilogmem);
String err_string = name + ": Vertex shader compilation failed:\n";
err_string += ilogmem;
_display_error_with_code(err_string, builder_string);
Memory::free_static(ilogmem);
glDeleteShader(spec.vert_id);
glDeleteProgram(spec.id);
spec.id = 0;
}
ERR_FAIL();
}
}
//fragment stage
{
StringBuilder builder;
_build_variant_code(builder, p_variant, p_version, stage_templates[STAGE_TYPE_FRAGMENT], p_specialization);
spec.frag_id = glCreateShader(GL_FRAGMENT_SHADER);
String builder_string = builder.as_string();
CharString cs = builder_string.utf8();
const char *cstr = cs.ptr();
glShaderSource(spec.frag_id, 1, &cstr, nullptr);
glCompileShader(spec.frag_id);
glGetShaderiv(spec.frag_id, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE) {
GLsizei iloglen;
glGetShaderiv(spec.frag_id, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(spec.frag_id);
glDeleteProgram(spec.id);
spec.id = 0;
ERR_PRINT("No OpenGL fragment shader compiler log.");
} else {
if (iloglen == 0) {
iloglen = 4096; // buggy driver (Adreno 220+)
}
char *ilogmem = (char *)Memory::alloc_static(iloglen + 1);
ilogmem[iloglen] = '\0';
glGetShaderInfoLog(spec.frag_id, iloglen, &iloglen, ilogmem);
String err_string = name + ": Fragment shader compilation failed:\n";
err_string += ilogmem;
_display_error_with_code(err_string, builder_string);
Memory::free_static(ilogmem);
glDeleteShader(spec.frag_id);
glDeleteProgram(spec.id);
spec.id = 0;
}
ERR_FAIL();
}
}
glAttachShader(spec.id, spec.frag_id);
glAttachShader(spec.id, spec.vert_id);
//for (int i = 0; i < attribute_pair_count; i++) {
// glBindAttribLocation(v.id, attribute_pairs[i].index, attribute_pairs[i].name);
//}
glLinkProgram(spec.id);
glGetProgramiv(spec.id, GL_LINK_STATUS, &status);
if (status == GL_FALSE) {
GLsizei iloglen;
glGetProgramiv(spec.id, GL_INFO_LOG_LENGTH, &iloglen);
if (iloglen < 0) {
glDeleteShader(spec.frag_id);
glDeleteShader(spec.vert_id);
glDeleteProgram(spec.id);
spec.id = 0;
ERR_PRINT("No OpenGL program link log. Something is wrong.");
ERR_FAIL();
}
if (iloglen == 0) {
iloglen = 4096; // buggy driver (Adreno 220+)
}
char *ilogmem = (char *)Memory::alloc_static(iloglen + 1);
ilogmem[iloglen] = '\0';
glGetProgramInfoLog(spec.id, iloglen, &iloglen, ilogmem);
String err_string = name + ": Program linking failed:\n";
err_string += ilogmem;
_display_error_with_code(err_string, String());
Memory::free_static(ilogmem);
glDeleteShader(spec.frag_id);
glDeleteShader(spec.vert_id);
glDeleteProgram(spec.id);
spec.id = 0;
ERR_FAIL();
}
// get uniform locations
glUseProgram(spec.id);
spec.uniform_location.resize(uniform_count);
for (int i = 0; i < uniform_count; i++) {
spec.uniform_location[i] = glGetUniformLocation(spec.id, uniform_names[i]);
}
for (int i = 0; i < texunit_pair_count; i++) {
GLint loc = glGetUniformLocation(spec.id, texunit_pairs[i].name);
if (loc >= 0) {
if (texunit_pairs[i].index < 0) {
glUniform1i(loc, max_image_units + texunit_pairs[i].index);
} else {
glUniform1i(loc, texunit_pairs[i].index);
}
}
}
for (int i = 0; i < ubo_count; i++) {
GLint loc = glGetUniformBlockIndex(spec.id, ubo_pairs[i].name);
if (loc >= 0) {
glUniformBlockBinding(spec.id, loc, ubo_pairs[i].index);
}
}
// textures
for (int i = 0; i < p_version->texture_uniforms.size(); i++) {
String native_uniform_name = p_version->texture_uniforms[i];
GLint location = glGetUniformLocation(spec.id, (native_uniform_name).ascii().get_data());
glUniform1i(location, i + base_texture_index);
}
glUseProgram(0);
spec.ok = true;
}
RS::ShaderNativeSourceCode ShaderGLES3::version_get_native_source_code(RID p_version) {
Version *version = version_owner.get_or_null(p_version);
RS::ShaderNativeSourceCode source_code;
ERR_FAIL_COND_V(!version, source_code);
source_code.versions.resize(variant_count);
for (int i = 0; i < source_code.versions.size(); i++) {
//vertex stage
{
StringBuilder builder;
_build_variant_code(builder, i, version, stage_templates[STAGE_TYPE_VERTEX], specialization_default_mask);
RS::ShaderNativeSourceCode::Version::Stage stage;
stage.name = "vertex";
stage.code = builder.as_string();
source_code.versions.write[i].stages.push_back(stage);
}
//fragment stage
{
StringBuilder builder;
_build_variant_code(builder, i, version, stage_templates[STAGE_TYPE_FRAGMENT], specialization_default_mask);
RS::ShaderNativeSourceCode::Version::Stage stage;
stage.name = "fragment";
stage.code = builder.as_string();
source_code.versions.write[i].stages.push_back(stage);
}
}
return source_code;
}
String ShaderGLES3::_version_get_sha1(Version *p_version) const {
StringBuilder hash_build;
hash_build.append("[uniforms]");
hash_build.append(p_version->uniforms.get_data());
hash_build.append("[vertex_globals]");
hash_build.append(p_version->vertex_globals.get_data());
hash_build.append("[fragment_globals]");
hash_build.append(p_version->fragment_globals.get_data());
Vector<StringName> code_sections;
for (const KeyValue<StringName, CharString> &E : p_version->code_sections) {
code_sections.push_back(E.key);
}
code_sections.sort_custom<StringName::AlphCompare>();
for (int i = 0; i < code_sections.size(); i++) {
hash_build.append(String("[code:") + String(code_sections[i]) + "]");
hash_build.append(p_version->code_sections[code_sections[i]].get_data());
}
for (int i = 0; i < p_version->custom_defines.size(); i++) {
hash_build.append("[custom_defines:" + itos(i) + "]");
hash_build.append(p_version->custom_defines[i].get_data());
}
return hash_build.as_string().sha1_text();
}
//static const char *shader_file_header = "GLSC";
//static const uint32_t cache_file_version = 2;
bool ShaderGLES3::_load_from_cache(Version *p_version) {
#if 0
String sha1 = _version_get_sha1(p_version);
String path = shader_cache_dir.plus_file(name).plus_file(base_sha256).plus_file(sha1) + ".cache";
Ref<FileAccess> f = FileAccess::open(path, FileAccess::READ);
if (f.is_null()) {
return false;
}
char header[5] = { 0, 0, 0, 0, 0 };
f->get_buffer((uint8_t *)header, 4);
ERR_FAIL_COND_V(header != String(shader_file_header), false);
uint32_t file_version = f->get_32();
if (file_version != cache_file_version) {
return false; // wrong version
}
uint32_t variant_count = f->get_32();
ERR_FAIL_COND_V(variant_count != (uint32_t)variant_count, false); //should not happen but check
for (uint32_t i = 0; i < variant_count; i++) {
uint32_t variant_size = f->get_32();
ERR_FAIL_COND_V(variant_size == 0 && variants_enabled[i], false);
if (!variants_enabled[i]) {
continue;
}
Vector<uint8_t> variant_bytes;
variant_bytes.resize(variant_size);
uint32_t br = f->get_buffer(variant_bytes.ptrw(), variant_size);
ERR_FAIL_COND_V(br != variant_size, false);
p_version->variant_data[i] = variant_bytes;
}
for (uint32_t i = 0; i < variant_count; i++) {
if (!variants_enabled[i]) {
MutexLock lock(variant_set_mutex);
p_version->variants[i] = RID();
continue;
}
RID shader = GLES3::get_singleton()->shader_create_from_bytecode(p_version->variant_data[i]);
if (shader.is_null()) {
for (uint32_t j = 0; j < i; j++) {
GLES3::get_singleton()->free(p_version->variants[i]);
}
ERR_FAIL_COND_V(shader.is_null(), false);
}
{
MutexLock lock(variant_set_mutex);
p_version->variants[i] = shader;
}
}
memdelete_arr(p_version->variant_data); //clear stages
p_version->variant_data = nullptr;
p_version->valid = true;
return true;
#endif
return false;
}
void ShaderGLES3::_save_to_cache(Version *p_version) {
#if 0
String sha1 = _version_get_sha1(p_version);
String path = shader_cache_dir.plus_file(name).plus_file(base_sha256).plus_file(sha1) + ".cache";
Ref<FileAccess> f = FileAccess::open(path, FileAccess::WRITE);
ERR_FAIL_COND(f.is_null());
f->store_buffer((const uint8_t *)shader_file_header, 4);
f->store_32(cache_file_version); //file version
uint32_t variant_count = variant_count;
f->store_32(variant_count); //variant count
for (uint32_t i = 0; i < variant_count; i++) {
f->store_32(p_version->variant_data[i].size()); //stage count
f->store_buffer(p_version->variant_data[i].ptr(), p_version->variant_data[i].size());
}
#endif
}
void ShaderGLES3::_clear_version(Version *p_version) {
// Variants not compiled yet, just return
if (p_version->variants.size() == 0) {
return;
}
for (int i = 0; i < variant_count; i++) {
for (OAHashMap<uint64_t, Version::Specialization>::Iterator it = p_version->variants[i].iter(); it.valid; it = p_version->variants[i].next_iter(it)) {
if (it.value->id != 0) {
glDeleteShader(it.value->vert_id);
glDeleteShader(it.value->frag_id);
glDeleteProgram(it.value->id);
}
}
}
p_version->variants.clear();
}
void ShaderGLES3::_initialize_version(Version *p_version) {
ERR_FAIL_COND(p_version->variants.size() > 0);
p_version->variants.reserve(variant_count);
for (int i = 0; i < variant_count; i++) {
OAHashMap<uint64_t, Version::Specialization> variant;
p_version->variants.push_back(variant);
Version::Specialization spec;
_compile_specialization(spec, i, p_version, specialization_default_mask);
p_version->variants[i].insert(specialization_default_mask, spec);
}
}
void ShaderGLES3::version_set_code(RID p_version, const HashMap<String, String> &p_code, const String &p_uniforms, const String &p_vertex_globals, const String &p_fragment_globals, const Vector<String> &p_custom_defines, const Vector<StringName> &p_texture_uniforms, bool p_initialize) {
Version *version = version_owner.get_or_null(p_version);
ERR_FAIL_COND(!version);
_clear_version(version); //clear if existing
version->vertex_globals = p_vertex_globals.utf8();
version->fragment_globals = p_fragment_globals.utf8();
version->uniforms = p_uniforms.utf8();
version->code_sections.clear();
version->texture_uniforms = p_texture_uniforms;
for (const KeyValue<String, String> &E : p_code) {
version->code_sections[StringName(E.key.to_upper())] = E.value.utf8();
}
version->custom_defines.clear();
for (int i = 0; i < p_custom_defines.size(); i++) {
version->custom_defines.push_back(p_custom_defines[i].utf8());
}
if (p_initialize) {
_initialize_version(version);
}
}
bool ShaderGLES3::version_is_valid(RID p_version) {
Version *version = version_owner.get_or_null(p_version);
return version != nullptr;
}
bool ShaderGLES3::version_free(RID p_version) {
if (version_owner.owns(p_version)) {
Version *version = version_owner.get_or_null(p_version);
_clear_version(version);
version_owner.free(p_version);
} else {
return false;
}
return true;
}
bool ShaderGLES3::shader_cache_cleanup_on_start = false;
ShaderGLES3::ShaderGLES3() {
}
void ShaderGLES3::initialize(const String &p_general_defines, int p_base_texture_index) {
general_defines = p_general_defines.utf8();
base_texture_index = p_base_texture_index;
_init();
if (shader_cache_dir != String()) {
StringBuilder hash_build;
hash_build.append("[base_hash]");
hash_build.append(base_sha256);
hash_build.append("[general_defines]");
hash_build.append(general_defines.get_data());
for (int i = 0; i < variant_count; i++) {
hash_build.append("[variant_defines:" + itos(i) + "]");
hash_build.append(variant_defines[i]);
}
base_sha256 = hash_build.as_string().sha256_text();
Ref<DirAccess> d = DirAccess::open(shader_cache_dir);
ERR_FAIL_COND(d.is_null());
if (d->change_dir(name) != OK) {
Error err = d->make_dir(name);
ERR_FAIL_COND(err != OK);
d->change_dir(name);
}
//erase other versions?
if (shader_cache_cleanup_on_start) {
}
//
if (d->change_dir(base_sha256) != OK) {
Error err = d->make_dir(base_sha256);
ERR_FAIL_COND(err != OK);
}
shader_cache_dir_valid = true;
print_verbose("Shader '" + name + "' SHA256: " + base_sha256);
}
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &max_image_units);
}
void ShaderGLES3::set_shader_cache_dir(const String &p_dir) {
shader_cache_dir = p_dir;
}
void ShaderGLES3::set_shader_cache_save_compressed(bool p_enable) {
shader_cache_save_compressed = p_enable;
}
void ShaderGLES3::set_shader_cache_save_compressed_zstd(bool p_enable) {
shader_cache_save_compressed_zstd = p_enable;
}
void ShaderGLES3::set_shader_cache_save_debug(bool p_enable) {
shader_cache_save_debug = p_enable;
}
String ShaderGLES3::shader_cache_dir;
bool ShaderGLES3::shader_cache_save_compressed = true;
bool ShaderGLES3::shader_cache_save_compressed_zstd = true;
bool ShaderGLES3::shader_cache_save_debug = true;
ShaderGLES3::~ShaderGLES3() {
List<RID> remaining;
version_owner.get_owned_list(&remaining);
if (remaining.size()) {
ERR_PRINT(itos(remaining.size()) + " shaders of type " + name + " were never freed");
while (remaining.size()) {
version_free(remaining.front()->get());
remaining.pop_front();
}
}
}
#endif
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