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shader_compiler.cpp
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shader_compiler.cpp
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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) {
return String("\t").repeat(p_level);
}
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 = rtos(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;
}
constexpr const char *name_mapping[] = {
"SAMPLER_NEAREST_CLAMP",
"SAMPLER_LINEAR_CLAMP",
"SAMPLER_NEAREST_WITH_MIPMAPS_CLAMP",
"SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP",
"SAMPLER_NEAREST_WITH_MIPMAPS_ANISOTROPIC_CLAMP",
"SAMPLER_LINEAR_WITH_MIPMAPS_ANISOTROPIC_CLAMP",
"SAMPLER_NEAREST_REPEAT",
"SAMPLER_LINEAR_REPEAT",
"SAMPLER_NEAREST_WITH_MIPMAPS_REPEAT",
"SAMPLER_LINEAR_WITH_MIPMAPS_REPEAT",
"SAMPLER_NEAREST_WITH_MIPMAPS_ANISOTROPIC_REPEAT",
"SAMPLER_LINEAR_WITH_MIPMAPS_ANISOTROPIC_REPEAT"
};
return String(name_mapping[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->vfunctions.size(); i++) {
if (p_node->vfunctions[i].name == p_for_func) {
fidx = i;
break;
}
}
ERR_FAIL_COND(fidx == -1);
Vector<StringName> uses_functions;
for (const StringName &E : p_node->vfunctions[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->vfunctions.size(); i++) {
if (p_node->vfunctions[i].name == uses_functions[k]) {
fnode = p_node->vfunctions[i].function;
break;
}
}
ERR_FAIL_NULL(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 + "+1u].xy)";
}
case ShaderLanguage::TYPE_MAT3: {
return "mat3(" + p_buffer + "[" + p_index + "].xyz," + p_buffer + "[" + p_index + "+1u].xyz," + p_buffer + "[" + p_index + "+2u].xyz)";
}
case ShaderLanguage::TYPE_MAT4: {
return "mat4(" + p_buffer + "[" + p_index + "].xyzw," + p_buffer + "[" + p_index + "+1u].xyzw," + p_buffer + "[" + p_index + "+2u].xyzw," + p_buffer + "[" + p_index + "+3u].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::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++) {
const 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++) {
const 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->vfunctions.size(); i++) {
SL::FunctionNode *fnode = pnode->vfunctions[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->vfunctions.size(); i++) {
SL::FunctionNode *fnode = pnode->vfunctions[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::NODE_TYPE_STRUCT: {
} break;
case SL::Node::NODE_TYPE_FUNCTION: {
} break;
case SL::Node::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::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::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::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];
} 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;
if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE) {
name = "color_buffer";
if (u.filter >= ShaderLanguage::FILTER_NEAREST_MIPMAP) {
r_gen_code.uses_screen_texture_mipmaps = true;
}
r_gen_code.uses_screen_texture = true;
} else if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE) {
name = "normal_roughness_buffer";
r_gen_code.uses_normal_roughness_texture = true;
} else if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
name = "depth_buffer";
r_gen_code.uses_depth_texture = true;
} else {
name = _mkid(vnode->name); //texture, use as is
}
code = 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::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::NODE_TYPE_ARRAY: {
SL::ArrayNode *anode = (SL::ArrayNode *)p_node;
bool use_fragment_varying = false;