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virtualx-engine/servers/rendering/shader_compiler.cpp
Rémi Verschelde d95794ec8a
One Copyright Update to rule them all 
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".
2023-01-05 13:25:55 +01:00

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/**************************************************************************/
/* shader_compiler.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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_compiler.h"
#include "core/config/project_settings.h"
#include "core/os/os.h"
#include "servers/rendering/rendering_server_globals.h"
#include "servers/rendering/shader_types.h"
#define SL ShaderLanguage
static String _mktab(int p_level) {
String tb;
for (int i = 0; i < p_level; i++) {
tb += "\t";
}
return tb;
}
static String _typestr(SL::DataType p_type) {
String type = ShaderLanguage::get_datatype_name(p_type);
if (!RS::get_singleton()->is_low_end() && ShaderLanguage::is_sampler_type(p_type)) {
type = type.replace("sampler", "texture"); //we use textures instead of samplers in Vulkan GLSL
}
return type;
}
static int _get_datatype_alignment(SL::DataType p_type) {
switch (p_type) {
case SL::TYPE_VOID:
return 0;
case SL::TYPE_BOOL:
return 4;
case SL::TYPE_BVEC2:
return 8;
case SL::TYPE_BVEC3:
return 16;
case SL::TYPE_BVEC4:
return 16;
case SL::TYPE_INT:
return 4;
case SL::TYPE_IVEC2:
return 8;
case SL::TYPE_IVEC3:
return 16;
case SL::TYPE_IVEC4:
return 16;
case SL::TYPE_UINT:
return 4;
case SL::TYPE_UVEC2:
return 8;
case SL::TYPE_UVEC3:
return 16;
case SL::TYPE_UVEC4:
return 16;
case SL::TYPE_FLOAT:
return 4;
case SL::TYPE_VEC2:
return 8;
case SL::TYPE_VEC3:
return 16;
case SL::TYPE_VEC4:
return 16;
case SL::TYPE_MAT2:
return 16;
case SL::TYPE_MAT3:
return 16;
case SL::TYPE_MAT4:
return 16;
case SL::TYPE_SAMPLER2D:
return 16;
case SL::TYPE_ISAMPLER2D:
return 16;
case SL::TYPE_USAMPLER2D:
return 16;
case SL::TYPE_SAMPLER2DARRAY:
return 16;
case SL::TYPE_ISAMPLER2DARRAY:
return 16;
case SL::TYPE_USAMPLER2DARRAY:
return 16;
case SL::TYPE_SAMPLER3D:
return 16;
case SL::TYPE_ISAMPLER3D:
return 16;
case SL::TYPE_USAMPLER3D:
return 16;
case SL::TYPE_SAMPLERCUBE:
return 16;
case SL::TYPE_SAMPLERCUBEARRAY:
return 16;
case SL::TYPE_STRUCT:
return 0;
case SL::TYPE_MAX: {
ERR_FAIL_V(0);
}
}
ERR_FAIL_V(0);
}
static String _interpstr(SL::DataInterpolation p_interp) {
switch (p_interp) {
case SL::INTERPOLATION_FLAT:
return "flat ";
case SL::INTERPOLATION_SMOOTH:
return "";
case SL::INTERPOLATION_DEFAULT:
return "";
}
return "";
}
static String _prestr(SL::DataPrecision p_pres, bool p_force_highp = false) {
switch (p_pres) {
case SL::PRECISION_LOWP:
return "lowp ";
case SL::PRECISION_MEDIUMP:
return "mediump ";
case SL::PRECISION_HIGHP:
return "highp ";
case SL::PRECISION_DEFAULT:
return p_force_highp ? "highp " : "";
}
return "";
}
static String _constr(bool p_is_const) {
if (p_is_const) {
return "const ";
}
return "";
}
static String _qualstr(SL::ArgumentQualifier p_qual) {
switch (p_qual) {
case SL::ARGUMENT_QUALIFIER_IN:
return "";
case SL::ARGUMENT_QUALIFIER_OUT:
return "out ";
case SL::ARGUMENT_QUALIFIER_INOUT:
return "inout ";
}
return "";
}
static String _opstr(SL::Operator p_op) {
return SL::get_operator_text(p_op);
}
static String _mkid(const String &p_id) {
String id = "m_" + p_id.replace("__", "_dus_");
return id.replace("__", "_dus_"); //doubleunderscore is reserved in glsl
}
static String f2sp0(float p_float) {
String num = rtoss(p_float);
if (!num.contains(".") && !num.contains("e")) {
num += ".0";
}
return num;
}
static String get_constant_text(SL::DataType p_type, const Vector<SL::ConstantNode::Value> &p_values) {
switch (p_type) {
case SL::TYPE_BOOL:
return p_values[0].boolean ? "true" : "false";
case SL::TYPE_BVEC2:
case SL::TYPE_BVEC3:
case SL::TYPE_BVEC4: {
String text = "bvec" + itos(p_type - SL::TYPE_BOOL + 1) + "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += p_values[i].boolean ? "true" : "false";
}
text += ")";
return text;
}
case SL::TYPE_INT:
return itos(p_values[0].sint);
case SL::TYPE_IVEC2:
case SL::TYPE_IVEC3:
case SL::TYPE_IVEC4: {
String text = "ivec" + itos(p_type - SL::TYPE_INT + 1) + "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += itos(p_values[i].sint);
}
text += ")";
return text;
} break;
case SL::TYPE_UINT:
return itos(p_values[0].uint) + "u";
case SL::TYPE_UVEC2:
case SL::TYPE_UVEC3:
case SL::TYPE_UVEC4: {
String text = "uvec" + itos(p_type - SL::TYPE_UINT + 1) + "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += itos(p_values[i].uint) + "u";
}
text += ")";
return text;
} break;
case SL::TYPE_FLOAT:
return f2sp0(p_values[0].real);
case SL::TYPE_VEC2:
case SL::TYPE_VEC3:
case SL::TYPE_VEC4: {
String text = "vec" + itos(p_type - SL::TYPE_FLOAT + 1) + "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += f2sp0(p_values[i].real);
}
text += ")";
return text;
} break;
case SL::TYPE_MAT2:
case SL::TYPE_MAT3:
case SL::TYPE_MAT4: {
String text = "mat" + itos(p_type - SL::TYPE_MAT2 + 2) + "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += f2sp0(p_values[i].real);
}
text += ")";
return text;
} break;
default:
ERR_FAIL_V(String());
}
}
String ShaderCompiler::_get_sampler_name(ShaderLanguage::TextureFilter p_filter, ShaderLanguage::TextureRepeat p_repeat) {
if (p_filter == ShaderLanguage::FILTER_DEFAULT) {
ERR_FAIL_COND_V(actions.default_filter == ShaderLanguage::FILTER_DEFAULT, String());
p_filter = actions.default_filter;
}
if (p_repeat == ShaderLanguage::REPEAT_DEFAULT) {
ERR_FAIL_COND_V(actions.default_repeat == ShaderLanguage::REPEAT_DEFAULT, String());
p_repeat = actions.default_repeat;
}
return actions.sampler_array_name + "[" + itos(p_filter + (p_repeat == ShaderLanguage::REPEAT_ENABLE ? ShaderLanguage::FILTER_DEFAULT : 0)) + "]";
}
void ShaderCompiler::_dump_function_deps(const SL::ShaderNode *p_node, const StringName &p_for_func, const HashMap<StringName, String> &p_func_code, String &r_to_add, HashSet<StringName> &added) {
int fidx = -1;
for (int i = 0; i < p_node->functions.size(); i++) {
if (p_node->functions[i].name == p_for_func) {
fidx = i;
break;
}
}
ERR_FAIL_COND(fidx == -1);
Vector<StringName> uses_functions;
for (const StringName &E : p_node->functions[fidx].uses_function) {
uses_functions.push_back(E);
}
uses_functions.sort_custom<StringName::AlphCompare>(); //ensure order is deterministic so the same shader is always produced
for (int k = 0; k < uses_functions.size(); k++) {
if (added.has(uses_functions[k])) {
continue; //was added already
}
_dump_function_deps(p_node, uses_functions[k], p_func_code, r_to_add, added);
SL::FunctionNode *fnode = nullptr;
for (int i = 0; i < p_node->functions.size(); i++) {
if (p_node->functions[i].name == uses_functions[k]) {
fnode = p_node->functions[i].function;
break;
}
}
ERR_FAIL_COND(!fnode);
r_to_add += "\n";
String header;
if (fnode->return_type == SL::TYPE_STRUCT) {
header = _mkid(fnode->return_struct_name);
} else {
header = _typestr(fnode->return_type);
}
if (fnode->return_array_size > 0) {
header += "[";
header += itos(fnode->return_array_size);
header += "]";
}
header += " ";
header += _mkid(fnode->name);
header += "(";
for (int i = 0; i < fnode->arguments.size(); i++) {
if (i > 0) {
header += ", ";
}
header += _constr(fnode->arguments[i].is_const);
if (fnode->arguments[i].type == SL::TYPE_STRUCT) {
header += _qualstr(fnode->arguments[i].qualifier) + _mkid(fnode->arguments[i].type_str) + " " + _mkid(fnode->arguments[i].name);
} else {
header += _qualstr(fnode->arguments[i].qualifier) + _prestr(fnode->arguments[i].precision) + _typestr(fnode->arguments[i].type) + " " + _mkid(fnode->arguments[i].name);
}
if (fnode->arguments[i].array_size > 0) {
header += "[";
header += itos(fnode->arguments[i].array_size);
header += "]";
}
}
header += ")\n";
r_to_add += header;
r_to_add += p_func_code[uses_functions[k]];
added.insert(uses_functions[k]);
}
}
static String _get_global_shader_uniform_from_type_and_index(const String &p_buffer, const String &p_index, ShaderLanguage::DataType p_type) {
switch (p_type) {
case ShaderLanguage::TYPE_BOOL: {
return "bool(floatBitsToUint(" + p_buffer + "[" + p_index + "].x))";
}
case ShaderLanguage::TYPE_BVEC2: {
return "bvec2(floatBitsToUint(" + p_buffer + "[" + p_index + "].xy))";
}
case ShaderLanguage::TYPE_BVEC3: {
return "bvec3(floatBitsToUint(" + p_buffer + "[" + p_index + "].xyz))";
}
case ShaderLanguage::TYPE_BVEC4: {
return "bvec4(floatBitsToUint(" + p_buffer + "[" + p_index + "].xyzw))";
}
case ShaderLanguage::TYPE_INT: {
return "floatBitsToInt(" + p_buffer + "[" + p_index + "].x)";
}
case ShaderLanguage::TYPE_IVEC2: {
return "floatBitsToInt(" + p_buffer + "[" + p_index + "].xy)";
}
case ShaderLanguage::TYPE_IVEC3: {
return "floatBitsToInt(" + p_buffer + "[" + p_index + "].xyz)";
}
case ShaderLanguage::TYPE_IVEC4: {
return "floatBitsToInt(" + p_buffer + "[" + p_index + "].xyzw)";
}
case ShaderLanguage::TYPE_UINT: {
return "floatBitsToUint(" + p_buffer + "[" + p_index + "].x)";
}
case ShaderLanguage::TYPE_UVEC2: {
return "floatBitsToUint(" + p_buffer + "[" + p_index + "].xy)";
}
case ShaderLanguage::TYPE_UVEC3: {
return "floatBitsToUint(" + p_buffer + "[" + p_index + "].xyz)";
}
case ShaderLanguage::TYPE_UVEC4: {
return "floatBitsToUint(" + p_buffer + "[" + p_index + "].xyzw)";
}
case ShaderLanguage::TYPE_FLOAT: {
return "(" + p_buffer + "[" + p_index + "].x)";
}
case ShaderLanguage::TYPE_VEC2: {
return "(" + p_buffer + "[" + p_index + "].xy)";
}
case ShaderLanguage::TYPE_VEC3: {
return "(" + p_buffer + "[" + p_index + "].xyz)";
}
case ShaderLanguage::TYPE_VEC4: {
return "(" + p_buffer + "[" + p_index + "].xyzw)";
}
case ShaderLanguage::TYPE_MAT2: {
return "mat2(" + p_buffer + "[" + p_index + "].xy," + p_buffer + "[" + p_index + "+1].xy)";
}
case ShaderLanguage::TYPE_MAT3: {
return "mat3(" + p_buffer + "[" + p_index + "].xyz," + p_buffer + "[" + p_index + "+1].xyz," + p_buffer + "[" + p_index + "+2].xyz)";
}
case ShaderLanguage::TYPE_MAT4: {
return "mat4(" + p_buffer + "[" + p_index + "].xyzw," + p_buffer + "[" + p_index + "+1].xyzw," + p_buffer + "[" + p_index + "+2].xyzw," + p_buffer + "[" + p_index + "+3].xyzw)";
}
default: {
ERR_FAIL_V("void");
}
}
}
String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, GeneratedCode &r_gen_code, IdentifierActions &p_actions, const DefaultIdentifierActions &p_default_actions, bool p_assigning, bool p_use_scope) {
String code;
switch (p_node->type) {
case SL::Node::TYPE_SHADER: {
SL::ShaderNode *pnode = (SL::ShaderNode *)p_node;
for (int i = 0; i < pnode->render_modes.size(); i++) {
if (p_default_actions.render_mode_defines.has(pnode->render_modes[i]) && !used_rmode_defines.has(pnode->render_modes[i])) {
r_gen_code.defines.push_back(p_default_actions.render_mode_defines[pnode->render_modes[i]]);
used_rmode_defines.insert(pnode->render_modes[i]);
}
if (p_actions.render_mode_flags.has(pnode->render_modes[i])) {
*p_actions.render_mode_flags[pnode->render_modes[i]] = true;
}
if (p_actions.render_mode_values.has(pnode->render_modes[i])) {
Pair<int *, int> &p = p_actions.render_mode_values[pnode->render_modes[i]];
*p.first = p.second;
}
}
// structs
for (int i = 0; i < pnode->vstructs.size(); i++) {
SL::StructNode *st = pnode->vstructs[i].shader_struct;
String struct_code;
struct_code += "struct ";
struct_code += _mkid(pnode->vstructs[i].name);
struct_code += " ";
struct_code += "{\n";
for (int j = 0; j < st->members.size(); j++) {
SL::MemberNode *m = st->members[j];
if (m->datatype == SL::TYPE_STRUCT) {
struct_code += _mkid(m->struct_name);
} else {
struct_code += _prestr(m->precision);
struct_code += _typestr(m->datatype);
}
struct_code += " ";
struct_code += m->name;
if (m->array_size > 0) {
struct_code += "[";
struct_code += itos(m->array_size);
struct_code += "]";
}
struct_code += ";\n";
}
struct_code += "}";
struct_code += ";\n";
for (int j = 0; j < STAGE_MAX; j++) {
r_gen_code.stage_globals[j] += struct_code;
}
}
int max_texture_uniforms = 0;
int max_uniforms = 0;
for (const KeyValue<StringName, SL::ShaderNode::Uniform> &E : pnode->uniforms) {
if (SL::is_sampler_type(E.value.type)) {
if (E.value.hint == SL::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
E.value.hint == SL::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
E.value.hint == SL::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
continue; // Don't create uniforms in the generated code for these.
}
max_texture_uniforms++;
} else {
if (E.value.scope == SL::ShaderNode::Uniform::SCOPE_INSTANCE) {
continue; // Instances are indexed directly, don't need index uniforms.
}
max_uniforms++;
}
}
r_gen_code.texture_uniforms.resize(max_texture_uniforms);
Vector<int> uniform_sizes;
Vector<int> uniform_alignments;
Vector<StringName> uniform_defines;
uniform_sizes.resize(max_uniforms);
uniform_alignments.resize(max_uniforms);
uniform_defines.resize(max_uniforms);
bool uses_uniforms = false;
Vector<StringName> uniform_names;
for (const KeyValue<StringName, SL::ShaderNode::Uniform> &E : pnode->uniforms) {
uniform_names.push_back(E.key);
}
uniform_names.sort_custom<StringName::AlphCompare>(); //ensure order is deterministic so the same shader is always produced
for (int k = 0; k < uniform_names.size(); k++) {
StringName uniform_name = uniform_names[k];
const SL::ShaderNode::Uniform &uniform = pnode->uniforms[uniform_name];
String ucode;
if (uniform.scope == SL::ShaderNode::Uniform::SCOPE_INSTANCE) {
//insert, but don't generate any code.
p_actions.uniforms->insert(uniform_name, uniform);
continue; // Instances are indexed directly, don't need index uniforms.
}
if (uniform.hint == SL::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
uniform.hint == SL::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
uniform.hint == SL::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
continue; // Don't create uniforms in the generated code for these.
}
if (SL::is_sampler_type(uniform.type)) {
// Texture layouts are different for OpenGL GLSL and Vulkan GLSL
if (!RS::get_singleton()->is_low_end()) {
ucode = "layout(set = " + itos(actions.texture_layout_set) + ", binding = " + itos(actions.base_texture_binding_index + uniform.texture_binding) + ") ";
}
ucode += "uniform ";
}
bool is_buffer_global = !SL::is_sampler_type(uniform.type) && uniform.scope == SL::ShaderNode::Uniform::SCOPE_GLOBAL;
if (is_buffer_global) {
//this is an integer to index the global table
ucode += _typestr(ShaderLanguage::TYPE_UINT);
} else {
ucode += _prestr(uniform.precision, ShaderLanguage::is_float_type(uniform.type));
ucode += _typestr(uniform.type);
}
ucode += " " + _mkid(uniform_name);
if (uniform.array_size > 0) {
ucode += "[";
ucode += itos(uniform.array_size);
ucode += "]";
}
ucode += ";\n";
if (SL::is_sampler_type(uniform.type)) {
for (int j = 0; j < STAGE_MAX; j++) {
r_gen_code.stage_globals[j] += ucode;
}
GeneratedCode::Texture texture;
texture.name = uniform_name;
texture.hint = uniform.hint;
texture.type = uniform.type;
texture.use_color = uniform.use_color;
texture.filter = uniform.filter;
texture.repeat = uniform.repeat;
texture.global = uniform.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL;
texture.array_size = uniform.array_size;
if (texture.global) {
r_gen_code.uses_global_textures = true;
}
r_gen_code.texture_uniforms.write[uniform.texture_order] = texture;
} else {
if (!uses_uniforms) {
uses_uniforms = true;
}
uniform_defines.write[uniform.order] = ucode;
if (is_buffer_global) {
//globals are indices into the global table
uniform_sizes.write[uniform.order] = ShaderLanguage::get_datatype_size(ShaderLanguage::TYPE_UINT);
uniform_alignments.write[uniform.order] = _get_datatype_alignment(ShaderLanguage::TYPE_UINT);
} else {
// The following code enforces a 16-byte alignment of uniform arrays.
if (uniform.array_size > 0) {
int size = ShaderLanguage::get_datatype_size(uniform.type) * uniform.array_size;
int m = (16 * uniform.array_size);
if ((size % m) != 0) {
size += m - (size % m);
}
uniform_sizes.write[uniform.order] = size;
uniform_alignments.write[uniform.order] = 16;
} else {
uniform_sizes.write[uniform.order] = ShaderLanguage::get_datatype_size(uniform.type);
uniform_alignments.write[uniform.order] = _get_datatype_alignment(uniform.type);
}
}
}
p_actions.uniforms->insert(uniform_name, uniform);
}
for (int i = 0; i < max_uniforms; i++) {
r_gen_code.uniforms += uniform_defines[i];
}
// add up
int offset = 0;
for (int i = 0; i < uniform_sizes.size(); i++) {
int align = offset % uniform_alignments[i];
if (align != 0) {
offset += uniform_alignments[i] - align;
}
r_gen_code.uniform_offsets.push_back(offset);
offset += uniform_sizes[i];
}
r_gen_code.uniform_total_size = offset;
if (r_gen_code.uniform_total_size % 16 != 0) { //UBO sizes must be multiples of 16
r_gen_code.uniform_total_size += 16 - (r_gen_code.uniform_total_size % 16);
}
uint32_t index = p_default_actions.base_varying_index;
List<Pair<StringName, SL::ShaderNode::Varying>> var_frag_to_light;
Vector<StringName> varying_names;
for (const KeyValue<StringName, SL::ShaderNode::Varying> &E : pnode->varyings) {
varying_names.push_back(E.key);
}
varying_names.sort_custom<StringName::AlphCompare>(); //ensure order is deterministic so the same shader is always produced
for (int k = 0; k < varying_names.size(); k++) {
StringName varying_name = varying_names[k];
const SL::ShaderNode::Varying &varying = pnode->varyings[varying_name];
if (varying.stage == SL::ShaderNode::Varying::STAGE_FRAGMENT_TO_LIGHT || varying.stage == SL::ShaderNode::Varying::STAGE_FRAGMENT) {
var_frag_to_light.push_back(Pair<StringName, SL::ShaderNode::Varying>(varying_name, varying));
fragment_varyings.insert(varying_name);
continue;
}
if (varying.type < SL::TYPE_INT) {
continue; // Ignore boolean types to prevent crashing (if varying is just declared).
}
String vcode;
String interp_mode = _interpstr(varying.interpolation);
vcode += _prestr(varying.precision, ShaderLanguage::is_float_type(varying.type));
vcode += _typestr(varying.type);
vcode += " " + _mkid(varying_name);
uint32_t inc = 1U;
if (varying.array_size > 0) {
inc = (uint32_t)varying.array_size;
vcode += "[";
vcode += itos(varying.array_size);
vcode += "]";
}
switch (varying.type) {
case SL::TYPE_MAT2:
inc *= 2U;
break;
case SL::TYPE_MAT3:
inc *= 3U;
break;
case SL::TYPE_MAT4:
inc *= 4U;
break;
default:
break;
}
vcode += ";\n";
// GLSL ES 3.0 does not allow layout qualifiers for varyings
if (!RS::get_singleton()->is_low_end()) {
r_gen_code.stage_globals[STAGE_VERTEX] += "layout(location=" + itos(index) + ") ";
r_gen_code.stage_globals[STAGE_FRAGMENT] += "layout(location=" + itos(index) + ") ";
}
r_gen_code.stage_globals[STAGE_VERTEX] += interp_mode + "out " + vcode;
r_gen_code.stage_globals[STAGE_FRAGMENT] += interp_mode + "in " + vcode;
index += inc;
}
if (var_frag_to_light.size() > 0) {
String gcode = "\n\nstruct {\n";
for (const Pair<StringName, SL::ShaderNode::Varying> &E : var_frag_to_light) {
gcode += "\t" + _prestr(E.second.precision) + _typestr(E.second.type) + " " + _mkid(E.first);
if (E.second.array_size > 0) {
gcode += "[";
gcode += itos(E.second.array_size);
gcode += "]";
}
gcode += ";\n";
}
gcode += "} frag_to_light;\n";
r_gen_code.stage_globals[STAGE_FRAGMENT] += gcode;
}
for (int i = 0; i < pnode->vconstants.size(); i++) {
const SL::ShaderNode::Constant &cnode = pnode->vconstants[i];
String gcode;
gcode += _constr(true);
gcode += _prestr(cnode.precision, ShaderLanguage::is_float_type(cnode.type));
if (cnode.type == SL::TYPE_STRUCT) {
gcode += _mkid(cnode.type_str);
} else {
gcode += _typestr(cnode.type);
}
gcode += " " + _mkid(String(cnode.name));
if (cnode.array_size > 0) {
gcode += "[";
gcode += itos(cnode.array_size);
gcode += "]";
}
gcode += "=";
gcode += _dump_node_code(cnode.initializer, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
gcode += ";\n";
for (int j = 0; j < STAGE_MAX; j++) {
r_gen_code.stage_globals[j] += gcode;
}
}
HashMap<StringName, String> function_code;
//code for functions
for (int i = 0; i < pnode->functions.size(); i++) {
SL::FunctionNode *fnode = pnode->functions[i].function;
function = fnode;
current_func_name = fnode->name;
function_code[fnode->name] = _dump_node_code(fnode->body, p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
function = nullptr;
}
//place functions in actual code
HashSet<StringName> added_funcs_per_stage[STAGE_MAX];
for (int i = 0; i < pnode->functions.size(); i++) {
SL::FunctionNode *fnode = pnode->functions[i].function;
function = fnode;
current_func_name = fnode->name;
if (p_actions.entry_point_stages.has(fnode->name)) {
Stage stage = p_actions.entry_point_stages[fnode->name];
_dump_function_deps(pnode, fnode->name, function_code, r_gen_code.stage_globals[stage], added_funcs_per_stage[stage]);
r_gen_code.code[fnode->name] = function_code[fnode->name];
}
function = nullptr;
}
//code+=dump_node_code(pnode->body,p_level);
} break;
case SL::Node::TYPE_STRUCT: {
} break;
case SL::Node::TYPE_FUNCTION: {
} break;
case SL::Node::TYPE_BLOCK: {
SL::BlockNode *bnode = (SL::BlockNode *)p_node;
//variables
if (!bnode->single_statement) {
code += _mktab(p_level - 1) + "{\n";
}
for (int i = 0; i < bnode->statements.size(); i++) {
String scode = _dump_node_code(bnode->statements[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
if (bnode->statements[i]->type == SL::Node::TYPE_CONTROL_FLOW || bnode->single_statement) {
code += scode; //use directly
if (bnode->use_comma_between_statements && i + 1 < bnode->statements.size()) {
code += ",";
}
} else {
code += _mktab(p_level) + scode + ";\n";
}
}
if (!bnode->single_statement) {
code += _mktab(p_level - 1) + "}\n";
}
} break;
case SL::Node::TYPE_VARIABLE_DECLARATION: {
SL::VariableDeclarationNode *vdnode = (SL::VariableDeclarationNode *)p_node;
String declaration;
declaration += _constr(vdnode->is_const);
if (vdnode->datatype == SL::TYPE_STRUCT) {
declaration += _mkid(vdnode->struct_name);
} else {
declaration += _prestr(vdnode->precision) + _typestr(vdnode->datatype);
}
declaration += " ";
for (int i = 0; i < vdnode->declarations.size(); i++) {
bool is_array = vdnode->declarations[i].size > 0;
if (i > 0) {
declaration += ",";
}
declaration += _mkid(vdnode->declarations[i].name);
if (is_array) {
declaration += "[";
if (vdnode->declarations[i].size_expression != nullptr) {
declaration += _dump_node_code(vdnode->declarations[i].size_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
} else {
declaration += itos(vdnode->declarations[i].size);
}
declaration += "]";
}
if (!is_array || vdnode->declarations[i].single_expression) {
if (!vdnode->declarations[i].initializer.is_empty()) {
declaration += "=";
declaration += _dump_node_code(vdnode->declarations[i].initializer[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
}
} else {
int size = vdnode->declarations[i].initializer.size();
if (size > 0) {
declaration += "=";
if (vdnode->datatype == SL::TYPE_STRUCT) {
declaration += _mkid(vdnode->struct_name);
} else {
declaration += _typestr(vdnode->datatype);
}
declaration += "[";
declaration += itos(size);
declaration += "]";
declaration += "(";
for (int j = 0; j < size; j++) {
if (j > 0) {
declaration += ",";
}
declaration += _dump_node_code(vdnode->declarations[i].initializer[j], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
}
declaration += ")";
}
}
}
code += declaration;
} break;
case SL::Node::TYPE_VARIABLE: {
SL::VariableNode *vnode = (SL::VariableNode *)p_node;
bool use_fragment_varying = false;
if (!vnode->is_local && !(p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_VERTEX)) {
if (p_assigning) {
if (shader->varyings.has(vnode->name)) {
use_fragment_varying = true;
}
} else {
if (fragment_varyings.has(vnode->name)) {
use_fragment_varying = true;
}
}
}
if (p_assigning && p_actions.write_flag_pointers.has(vnode->name)) {
*p_actions.write_flag_pointers[vnode->name] = true;
}
if (p_default_actions.usage_defines.has(vnode->name) && !used_name_defines.has(vnode->name)) {
String define = p_default_actions.usage_defines[vnode->name];
if (define.begins_with("@")) {
define = p_default_actions.usage_defines[define.substr(1, define.length())];
}
r_gen_code.defines.push_back(define);
used_name_defines.insert(vnode->name);
}
if (p_actions.usage_flag_pointers.has(vnode->name) && !used_flag_pointers.has(vnode->name)) {
*p_actions.usage_flag_pointers[vnode->name] = true;
used_flag_pointers.insert(vnode->name);
}
if (p_default_actions.renames.has(vnode->name)) {
code = p_default_actions.renames[vnode->name];
if (vnode->name == "SCREEN_TEXTURE") {
r_gen_code.uses_screen_texture_mipmaps = true;
}
} else {
if (shader->uniforms.has(vnode->name)) {
//its a uniform!
const ShaderLanguage::ShaderNode::Uniform &u = shader->uniforms[vnode->name];
if (u.texture_order >= 0) {
StringName name = vnode->name;
if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE) {
name = "SCREEN_TEXTURE";
if (u.filter >= ShaderLanguage::FILTER_NEAREST_MIPMAP) {
r_gen_code.uses_screen_texture_mipmaps = true;
}
} else if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE) {
name = "NORMAL_ROUGHNESS_TEXTURE";
} else if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
name = "DEPTH_TEXTURE";
} else {
name = _mkid(vnode->name); //texture, use as is
}
if (p_default_actions.renames.has(name)) {
code = p_default_actions.renames[name];
} else {
code = name;
}
if (p_actions.usage_flag_pointers.has(name) && !used_flag_pointers.has(name)) {
*p_actions.usage_flag_pointers[name] = true;
used_flag_pointers.insert(name);
}
} else {
//a scalar or vector
if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL) {
code = actions.base_uniform_string + _mkid(vnode->name); //texture, use as is
//global variable, this means the code points to an index to the global table
code = _get_global_shader_uniform_from_type_and_index(p_default_actions.global_buffer_array_variable, code, u.type);
} else if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_INSTANCE) {
//instance variable, index it as such
code = "(" + p_default_actions.instance_uniform_index_variable + "+" + itos(u.instance_index) + ")";
code = _get_global_shader_uniform_from_type_and_index(p_default_actions.global_buffer_array_variable, code, u.type);
} else {
//regular uniform, index from UBO
code = actions.base_uniform_string + _mkid(vnode->name);
}
}
} else {
if (use_fragment_varying) {
code = "frag_to_light.";
}
code += _mkid(vnode->name); //its something else (local var most likely) use as is
}
}
if (vnode->name == time_name) {
if (p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_VERTEX) {
r_gen_code.uses_vertex_time = true;
}
if (p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_FRAGMENT) {
r_gen_code.uses_fragment_time = true;
}
}
} break;
case SL::Node::TYPE_ARRAY_CONSTRUCT: {
SL::ArrayConstructNode *acnode = (SL::ArrayConstructNode *)p_node;
int sz = acnode->initializer.size();
if (acnode->datatype == SL::TYPE_STRUCT) {
code += _mkid(acnode->struct_name);
} else {
code += _typestr(acnode->datatype);
}
code += "[";
code += itos(acnode->initializer.size());
code += "]";
code += "(";
for (int i = 0; i < sz; i++) {
code += _dump_node_code(acnode->initializer[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
if (i != sz - 1) {
code += ", ";
}
}
code += ")";
} break;
case SL::Node::TYPE_ARRAY: {
SL::ArrayNode *anode = (SL::ArrayNode *)p_node;
bool use_fragment_varying = false;
if (!anode->is_local && !(p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_VERTEX)) {
if (anode->assign_expression != nullptr && shader->varyings.has(anode->name)) {
use_fragment_varying = true;
} else {
if (p_assigning) {
if (shader->varyings.has(anode->name)) {
use_fragment_varying = true;
}
} else {
if (fragment_varyings.has(anode->name)) {
use_fragment_varying = true;
}
}
}
}
if (p_assigning && p_actions.write_flag_pointers.has(anode->name)) {
*p_actions.write_flag_pointers[anode->name] = true;
}
if (p_default_actions.usage_defines.has(anode->name) && !used_name_defines.has(anode->name)) {
String define = p_default_actions.usage_defines[anode->name];
if (define.begins_with("@")) {
define = p_default_actions.usage_defines[define.substr(1, define.length())];
}
r_gen_code.defines.push_back(define);
used_name_defines.insert(anode->name);
}
if (p_actions.usage_flag_pointers.has(anode->name) && !used_flag_pointers.has(anode->name)) {
*p_actions.usage_flag_pointers[anode->name] = true;
used_flag_pointers.insert(anode->name);
}
if (p_default_actions.renames.has(anode->name)) {
code = p_default_actions.renames[anode->name];
} else {
if (shader->uniforms.has(anode->name)) {
//its a uniform!
const ShaderLanguage::ShaderNode::Uniform &u = shader->uniforms[anode->name];
if (u.texture_order >= 0) {
code = _mkid(anode->name); //texture, use as is
} else {
//a scalar or vector
if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL) {
code = actions.base_uniform_string + _mkid(anode->name); //texture, use as is
//global variable, this means the code points to an index to the global table
code = _get_global_shader_uniform_from_type_and_index(p_default_actions.global_buffer_array_variable, code, u.type);
} else if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_INSTANCE) {
//instance variable, index it as such
code = "(" + p_default_actions.instance_uniform_index_variable + "+" + itos(u.instance_index) + ")";
code = _get_global_shader_uniform_from_type_and_index(p_default_actions.global_buffer_array_variable, code, u.type);
} else {
//regular uniform, index from UBO
code = actions.base_uniform_string + _mkid(anode->name);
}
}
} else {
if (use_fragment_varying) {
code = "frag_to_light.";
}
code += _mkid(anode->name);
}
}
if (anode->call_expression != nullptr) {
code += ".";
code += _dump_node_code(anode->call_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning, false);
} else if (anode->index_expression != nullptr) {
code += "[";
code += _dump_node_code(anode->index_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "]";
} else if (anode->assign_expression != nullptr) {
code += "=";
code += _dump_node_code(anode->assign_expression, p_level, r_gen_code, p_actions, p_default_actions, true, false);
}
if (anode->name == time_name) {
if (p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_VERTEX) {
r_gen_code.uses_vertex_time = true;
}
if (p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_FRAGMENT) {
r_gen_code.uses_fragment_time = true;
}
}
} break;
case SL::Node::TYPE_CONSTANT: {
SL::ConstantNode *cnode = (SL::ConstantNode *)p_node;
if (cnode->array_size == 0) {
return get_constant_text(cnode->datatype, cnode->values);
} else {
if (cnode->get_datatype() == SL::TYPE_STRUCT) {
code += _mkid(cnode->struct_name);
} else {
code += _typestr(cnode->datatype);
}
code += "[";
code += itos(cnode->array_size);
code += "]";
code += "(";
for (int i = 0; i < cnode->array_size; i++) {
if (i > 0) {
code += ",";
} else {
code += "";
}
code += _dump_node_code(cnode->array_declarations[0].initializer[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
}
code += ")";
}
} break;
case SL::Node::TYPE_OPERATOR: {
SL::OperatorNode *onode = (SL::OperatorNode *)p_node;
switch (onode->op) {
case SL::OP_ASSIGN:
case SL::OP_ASSIGN_ADD:
case SL::OP_ASSIGN_SUB:
case SL::OP_ASSIGN_MUL:
case SL::OP_ASSIGN_DIV:
case SL::OP_ASSIGN_SHIFT_LEFT:
case SL::OP_ASSIGN_SHIFT_RIGHT:
case SL::OP_ASSIGN_MOD:
case SL::OP_ASSIGN_BIT_AND:
case SL::OP_ASSIGN_BIT_OR:
case SL::OP_ASSIGN_BIT_XOR:
code = _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, true) + _opstr(onode->op) + _dump_node_code(onode->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
break;
case SL::OP_BIT_INVERT:
case SL::OP_NEGATE:
case SL::OP_NOT:
case SL::OP_DECREMENT:
case SL::OP_INCREMENT:
code = _opstr(onode->op) + _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
break;
case SL::OP_POST_DECREMENT:
case SL::OP_POST_INCREMENT:
code = _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + _opstr(onode->op);
break;
case SL::OP_CALL:
case SL::OP_STRUCT:
case SL::OP_CONSTRUCT: {
ERR_FAIL_COND_V(onode->arguments[0]->type != SL::Node::TYPE_VARIABLE, String());
const SL::VariableNode *vnode = static_cast<const SL::VariableNode *>(onode->arguments[0]);
const SL::FunctionNode *func = nullptr;
const bool is_internal_func = internal_functions.has(vnode->name);
if (!is_internal_func) {
for (int i = 0; i < shader->functions.size(); i++) {
if (shader->functions[i].name == vnode->name) {
func = shader->functions[i].function;
break;
}
}
}
bool is_texture_func = false;
bool is_screen_texture = false;
if (onode->op == SL::OP_STRUCT) {
code += _mkid(vnode->name);
} else if (onode->op == SL::OP_CONSTRUCT) {
code += String(vnode->name);
} else {
if (p_actions.usage_flag_pointers.has(vnode->name) && !used_flag_pointers.has(vnode->name)) {
*p_actions.usage_flag_pointers[vnode->name] = true;
used_flag_pointers.insert(vnode->name);
}
if (is_internal_func) {
code += vnode->name;
is_texture_func = texture_functions.has(vnode->name);
} else if (p_default_actions.renames.has(vnode->name)) {
code += p_default_actions.renames[vnode->name];
} else {
code += _mkid(vnode->name);
}
}
code += "(";
for (int i = 1; i < onode->arguments.size(); i++) {
if (i > 1) {
code += ", ";
}
bool is_out_qualifier = false;
if (is_internal_func) {
is_out_qualifier = SL::is_builtin_func_out_parameter(vnode->name, i - 1);
} else if (func != nullptr) {
const SL::ArgumentQualifier qualifier = func->arguments[i - 1].qualifier;
is_out_qualifier = qualifier == SL::ARGUMENT_QUALIFIER_OUT || qualifier == SL::ARGUMENT_QUALIFIER_INOUT;
}
if (is_out_qualifier) {
StringName name;
bool found = false;
{
const SL::Node *node = onode->arguments[i];
bool done = false;
do {
switch (node->type) {
case SL::Node::TYPE_VARIABLE: {
name = static_cast<const SL::VariableNode *>(node)->name;
done = true;
found = true;
} break;
case SL::Node::TYPE_MEMBER: {
node = static_cast<const SL::MemberNode *>(node)->owner;
} break;
default: {
done = true;
} break;
}
} while (!done);
}
if (found && p_actions.write_flag_pointers.has(name)) {
*p_actions.write_flag_pointers[name] = true;
}
}
String node_code = _dump_node_code(onode->arguments[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
if (!RS::get_singleton()->is_low_end() && is_texture_func && i == 1) {
//need to map from texture to sampler in order to sample when using Vulkan GLSL
StringName texture_uniform;
bool correct_texture_uniform = false;
switch (onode->arguments[i]->type) {
case SL::Node::TYPE_VARIABLE: {
const SL::VariableNode *varnode = static_cast<const SL::VariableNode *>(onode->arguments[i]);
texture_uniform = varnode->name;
correct_texture_uniform = true;
} break;
case SL::Node::TYPE_ARRAY: {
const SL::ArrayNode *anode = static_cast<const SL::ArrayNode *>(onode->arguments[i]);
texture_uniform = anode->name;
correct_texture_uniform = true;
} break;
default:
break;
}
if (correct_texture_uniform) {
//TODO Needs to detect screen_texture hint as well
is_screen_texture = (texture_uniform == "SCREEN_TEXTURE");
String sampler_name;
if (actions.custom_samplers.has(texture_uniform)) {
sampler_name = actions.custom_samplers[texture_uniform];
} else {
if (shader->uniforms.has(texture_uniform)) {
sampler_name = _get_sampler_name(shader->uniforms[texture_uniform].filter, shader->uniforms[texture_uniform].repeat);
} else {
bool found = false;
for (int j = 0; j < function->arguments.size(); j++) {
if (function->arguments[j].name == texture_uniform) {
if (function->arguments[j].tex_builtin_check) {
ERR_CONTINUE(!actions.custom_samplers.has(function->arguments[j].tex_builtin));
sampler_name = actions.custom_samplers[function->arguments[j].tex_builtin];
found = true;
break;
}
if (function->arguments[j].tex_argument_check) {
sampler_name = _get_sampler_name(function->arguments[j].tex_argument_filter, function->arguments[j].tex_argument_repeat);
found = true;
break;
}
}
}
if (!found) {
//function was most likely unused, so use anything (compiler will remove it anyway)
sampler_name = _get_sampler_name(ShaderLanguage::FILTER_DEFAULT, ShaderLanguage::REPEAT_DEFAULT);
}
}
}
code += ShaderLanguage::get_datatype_name(onode->arguments[i]->get_datatype()) + "(" + node_code + ", " + sampler_name + ")";
} else {
code += node_code;
}
} else {
code += node_code;
}
}
code += ")";
if (is_screen_texture && actions.apply_luminance_multiplier) {
code = "(" + code + " * vec4(vec3(sc_luminance_multiplier), 1.0))";
}
} break;
case SL::OP_INDEX: {
code += _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "[";
code += _dump_node_code(onode->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "]";
} break;
case SL::OP_SELECT_IF: {
code += "(";
code += _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "?";
code += _dump_node_code(onode->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += ":";
code += _dump_node_code(onode->arguments[2], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += ")";
} break;
case SL::OP_EMPTY: {
// Semicolon (or empty statement) - ignored.
} break;
default: {
if (p_use_scope) {
code += "(";
}
code += _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + _opstr(onode->op) + _dump_node_code(onode->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
if (p_use_scope) {
code += ")";
}
break;
}
}
} break;
case SL::Node::TYPE_CONTROL_FLOW: {
SL::ControlFlowNode *cfnode = (SL::ControlFlowNode *)p_node;
if (cfnode->flow_op == SL::FLOW_OP_IF) {
code += _mktab(p_level) + "if (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ")\n";
code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
if (cfnode->blocks.size() == 2) {
code += _mktab(p_level) + "else\n";
code += _dump_node_code(cfnode->blocks[1], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
}
} else if (cfnode->flow_op == SL::FLOW_OP_SWITCH) {
code += _mktab(p_level) + "switch (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ")\n";
code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
} else if (cfnode->flow_op == SL::FLOW_OP_CASE) {
code += _mktab(p_level) + "case " + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ":\n";
code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
} else if (cfnode->flow_op == SL::FLOW_OP_DEFAULT) {
code += _mktab(p_level) + "default:\n";
code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
} else if (cfnode->flow_op == SL::FLOW_OP_DO) {
code += _mktab(p_level) + "do";
code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
code += _mktab(p_level) + "while (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ");";
} else if (cfnode->flow_op == SL::FLOW_OP_WHILE) {
code += _mktab(p_level) + "while (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ")\n";
code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
} else if (cfnode->flow_op == SL::FLOW_OP_FOR) {
String left = _dump_node_code(cfnode->blocks[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
String middle = _dump_node_code(cfnode->blocks[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
String right = _dump_node_code(cfnode->blocks[2], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += _mktab(p_level) + "for (" + left + ";" + middle + ";" + right + ")\n";
code += _dump_node_code(cfnode->blocks[3], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
} else if (cfnode->flow_op == SL::FLOW_OP_RETURN) {
if (cfnode->expressions.size()) {
code = "return " + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ";";
} else {
code = "return;";
}
} else if (cfnode->flow_op == SL::FLOW_OP_DISCARD) {
if (p_actions.usage_flag_pointers.has("DISCARD") && !used_flag_pointers.has("DISCARD")) {
*p_actions.usage_flag_pointers["DISCARD"] = true;
used_flag_pointers.insert("DISCARD");
}
code = "discard;";
} else if (cfnode->flow_op == SL::FLOW_OP_CONTINUE) {
code = "continue;";
} else if (cfnode->flow_op == SL::FLOW_OP_BREAK) {
code = "break;";
}
} break;
case SL::Node::TYPE_MEMBER: {
SL::MemberNode *mnode = (SL::MemberNode *)p_node;
code = _dump_node_code(mnode->owner, p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + "." + mnode->name;
if (mnode->index_expression != nullptr) {
code += "[";
code += _dump_node_code(mnode->index_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "]";
} else if (mnode->assign_expression != nullptr) {
code += "=";
code += _dump_node_code(mnode->assign_expression, p_level, r_gen_code, p_actions, p_default_actions, true, false);
} else if (mnode->call_expression != nullptr) {
code += ".";
code += _dump_node_code(mnode->call_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning, false);
}
} break;
}
return code;
}
ShaderLanguage::DataType ShaderCompiler::_get_global_shader_uniform_type(const StringName &p_name) {
RS::GlobalShaderParameterType gvt = RSG::material_storage->global_shader_parameter_get_type(p_name);
return (ShaderLanguage::DataType)RS::global_shader_uniform_type_get_shader_datatype(gvt);
}
Error ShaderCompiler::compile(RS::ShaderMode p_mode, const String &p_code, IdentifierActions *p_actions, const String &p_path, GeneratedCode &r_gen_code) {
SL::ShaderCompileInfo info;
info.functions = ShaderTypes::get_singleton()->get_functions(p_mode);
info.render_modes = ShaderTypes::get_singleton()->get_modes(p_mode);
info.shader_types = ShaderTypes::get_singleton()->get_types();
info.global_shader_uniform_type_func = _get_global_shader_uniform_type;
Error err = parser.compile(p_code, info);
if (err != OK) {
Vector<ShaderLanguage::FilePosition> include_positions = parser.get_include_positions();
String current;
HashMap<String, Vector<String>> includes;
includes[""] = Vector<String>();
Vector<String> include_stack;
Vector<String> shader_lines = p_code.split("\n");
// Reconstruct the files.
for (int i = 0; i < shader_lines.size(); i++) {
String l = shader_lines[i];
if (l.begins_with("@@>")) {
String inc_path = l.replace_first("@@>", "");
l = "#include \"" + inc_path + "\"";
includes[current].append("#include \"" + inc_path + "\""); // Restore the include directive
include_stack.push_back(current);
current = inc_path;
includes[inc_path] = Vector<String>();
} else if (l.begins_with("@@<")) {
if (include_stack.size()) {
current = include_stack[include_stack.size() - 1];
include_stack.resize(include_stack.size() - 1);
}
} else {
includes[current].push_back(l);
}
}
// Print the files.
for (const KeyValue<String, Vector<String>> &E : includes) {
if (E.key.is_empty()) {
if (p_path == "") {
print_line("--Main Shader--");
} else {
print_line("--" + p_path + "--");
}
} else {
print_line("--" + E.key + "--");
}
int err_line = -1;
for (int i = 0; i < include_positions.size(); i++) {
if (include_positions[i].file == E.key) {
err_line = include_positions[i].line;
}
}
const Vector<String> &V = E.value;
for (int i = 0; i < V.size(); i++) {
if (i == err_line - 1) {
// Mark the error line to be visible without having to look at
// the trace at the end.
print_line(vformat("E%4d-> %s", i + 1, V[i]));
} else {
print_line(vformat("%5d | %s", i + 1, V[i]));
}
}
}
String file;
int line;
if (include_positions.size() > 1) {
file = include_positions[include_positions.size() - 1].file;
line = include_positions[include_positions.size() - 1].line;
} else {
file = p_path;
line = parser.get_error_line();
}
_err_print_error(nullptr, file.utf8().get_data(), line, parser.get_error_text().utf8().get_data(), false, ERR_HANDLER_SHADER);
return err;
}
r_gen_code.defines.clear();
r_gen_code.code.clear();
for (int i = 0; i < STAGE_MAX; i++) {
r_gen_code.stage_globals[i] = String();
}
r_gen_code.uses_fragment_time = false;
r_gen_code.uses_vertex_time = false;
r_gen_code.uses_global_textures = false;
r_gen_code.uses_screen_texture_mipmaps = false;
used_name_defines.clear();
used_rmode_defines.clear();
used_flag_pointers.clear();
fragment_varyings.clear();
shader = parser.get_shader();
function = nullptr;
_dump_node_code(shader, 1, r_gen_code, *p_actions, actions, false);
return OK;
}
void ShaderCompiler::initialize(DefaultIdentifierActions p_actions) {
actions = p_actions;
time_name = "TIME";
List<String> func_list;
ShaderLanguage::get_builtin_funcs(&func_list);
for (const String &E : func_list) {
internal_functions.insert(E);
}
texture_functions.insert("texture");
texture_functions.insert("textureProj");
texture_functions.insert("textureLod");
texture_functions.insert("textureProjLod");
texture_functions.insert("textureGrad");
texture_functions.insert("textureProjGrad");
texture_functions.insert("textureGather");
texture_functions.insert("textureSize");
texture_functions.insert("textureQueryLod");
texture_functions.insert("textureQueryLevels");
texture_functions.insert("texelFetch");
}
ShaderCompiler::ShaderCompiler() {
}
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