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pandemonium_engine_minimal/drivers/gles2/shader_compiler_gles2.cpp

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/* shader_compiler_gles2.cpp */
#include "shader_compiler_gles2.h"
#include "core/os/os.h"
#include "core/config/project_settings.h"
#include "core/string/string_buffer.h"
#include "core/string/string_builder.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) {
return ShaderLanguage::get_datatype_name(p_type);
}
static String _prestr(SL::DataPrecision p_pres) {
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 "";
}
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 "in ";
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.find(".") == -1 && num.find("e") == -1) {
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: {
StringBuffer<> text;
text += "bvec";
text += itos(p_type - SL::TYPE_BOOL + 1);
text += "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += p_values[i].boolean ? "true" : "false";
}
text += ")";
return text.as_string();
}
// GLSL ES 2 doesn't support uints, so we just use signed ints instead...
case SL::TYPE_UINT:
return itos(p_values[0].uint);
case SL::TYPE_UVEC2:
case SL::TYPE_UVEC3:
case SL::TYPE_UVEC4: {
StringBuffer<> text;
text += "ivec";
text += itos(p_type - SL::TYPE_UINT + 1);
text += "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += itos(p_values[i].uint);
}
text += ")";
return text.as_string();
} break;
case SL::TYPE_INT:
return itos(p_values[0].sint);
case SL::TYPE_IVEC2:
case SL::TYPE_IVEC3:
case SL::TYPE_IVEC4: {
StringBuffer<> text;
text += "ivec";
text += itos(p_type - SL::TYPE_INT + 1);
text += "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += itos(p_values[i].sint);
}
text += ")";
return text.as_string();
} break;
case SL::TYPE_FLOAT:
return f2sp0(p_values[0].real);
case SL::TYPE_VEC2:
case SL::TYPE_VEC3:
case SL::TYPE_VEC4: {
StringBuffer<> text;
text += "vec";
text += itos(p_type - SL::TYPE_FLOAT + 1);
text += "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += f2sp0(p_values[i].real);
}
text += ")";
return text.as_string();
} break;
case SL::TYPE_MAT2:
case SL::TYPE_MAT3:
case SL::TYPE_MAT4: {
StringBuffer<> text;
text += "mat";
text += itos(p_type - SL::TYPE_MAT2 + 2);
text += "(";
for (int i = 0; i < p_values.size(); i++) {
if (i > 0) {
text += ",";
}
text += f2sp0(p_values[i].real);
}
text += ")";
return text.as_string();
} break;
default:
ERR_FAIL_V(String());
}
}
void ShaderCompilerGLES2::_dump_function_deps(const SL::ShaderNode *p_node, const StringName &p_for_func, const RBMap<StringName, String> &p_func_code, StringBuilder &r_to_add, RBSet<StringName> &r_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);
for (RBSet<StringName>::Element *E = p_node->functions[fidx].uses_function.front(); E; E = E->next()) {
if (r_added.has(E->get())) {
continue;
}
_dump_function_deps(p_node, E->get(), p_func_code, r_to_add, r_added);
SL::FunctionNode *fnode = nullptr;
for (int i = 0; i < p_node->functions.size(); i++) {
if (p_node->functions[i].name == E->get()) {
fnode = p_node->functions[i].function;
break;
}
}
ERR_FAIL_COND(!fnode);
r_to_add += "\n";
StringBuffer<128> header;
if (fnode->return_type == SL::TYPE_STRUCT) {
header += _mkid(fnode->return_struct_name) + " " + _mkid(fnode->name) + "(";
} else {
header += _typestr(fnode->return_type) + " " + _mkid(fnode->name) + "(";
}
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);
}
}
header += ")\n";
r_to_add += header.as_string();
r_to_add += p_func_code[E->get()];
r_added.insert(E->get());
}
}
String ShaderCompilerGLES2::_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) {
StringBuilder code;
switch (p_node->type) {
case SL::Node::TYPE_SHADER: {
SL::ShaderNode *snode = (SL::ShaderNode *)p_node;
for (int i = 0; i < snode->render_modes.size(); i++) {
if (p_default_actions.render_mode_defines.has(snode->render_modes[i]) && !used_rmode_defines.has(snode->render_modes[i])) {
r_gen_code.custom_defines.push_back(p_default_actions.render_mode_defines[snode->render_modes[i]].utf8());
used_rmode_defines.insert(snode->render_modes[i]);
}
if (p_actions.render_mode_flags.has(snode->render_modes[i])) {
*p_actions.render_mode_flags[snode->render_modes[i]] = true;
}
if (p_actions.render_mode_values.has(snode->render_modes[i])) {
Pair<int *, int> &p = p_actions.render_mode_values[snode->render_modes[i]];
*p.first = p.second;
}
}
int max_texture_uniforms = 0;
int max_uniforms = 0;
for (OrderedHashMap<StringName, SL::ShaderNode::Uniform>::Element E = snode->uniforms.front(); E; E = E.next()) {
if (SL::is_sampler_type(E.get().type)) {
max_texture_uniforms++;
} else {
max_uniforms++;
}
}
r_gen_code.texture_uniforms.resize(max_texture_uniforms);
r_gen_code.texture_hints.resize(max_texture_uniforms);
r_gen_code.uniforms.resize(max_uniforms + max_texture_uniforms);
StringBuilder vertex_global;
StringBuilder fragment_global;
// structs
for (int i = 0; i < snode->vstructs.size(); i++) {
SL::StructNode *st = snode->vstructs[i].shader_struct;
String struct_code;
struct_code += "struct ";
struct_code += _mkid(snode->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";
vertex_global += struct_code;
fragment_global += struct_code;
}
// uniforms
for (OrderedHashMap<StringName, SL::ShaderNode::Uniform>::Element E = snode->uniforms.front(); E; E = E.next()) {
StringBuffer<> uniform_code;
// use highp if no precision is specified to prevent different default values in fragment and vertex shader
SL::DataPrecision precision = E.get().precision;
if (precision == SL::PRECISION_DEFAULT && E.get().type != SL::TYPE_BOOL) {
precision = SL::PRECISION_HIGHP;
}
uniform_code += "uniform ";
uniform_code += _prestr(precision);
uniform_code += _typestr(E.get().type);
uniform_code += " ";
uniform_code += _mkid(E.key());
uniform_code += ";\n";
if (SL::is_sampler_type(E.get().type)) {
r_gen_code.texture_uniforms.write[E.get().texture_order] = E.key();
r_gen_code.texture_hints.write[E.get().texture_order] = E.get().hint;
} else {
r_gen_code.uniforms.write[E.get().order] = E.key();
}
vertex_global += uniform_code.as_string();
fragment_global += uniform_code.as_string();
p_actions.uniforms->insert(E.key(), E.get());
}
// varyings
List<Pair<StringName, SL::ShaderNode::Varying>> var_frag_to_light;
for (OrderedHashMap<StringName, SL::ShaderNode::Varying>::Element E = snode->varyings.front(); E; E = E.next()) {
if (E.get().stage == SL::ShaderNode::Varying::STAGE_FRAGMENT_TO_LIGHT || E.get().stage == SL::ShaderNode::Varying::STAGE_FRAGMENT) {
var_frag_to_light.push_back(Pair<StringName, SL::ShaderNode::Varying>(E.key(), E.get()));
fragment_varyings.insert(E.key());
continue;
}
StringBuffer<> varying_code;
varying_code += "varying ";
varying_code += _prestr(E.get().precision);
varying_code += _typestr(E.get().type);
varying_code += " ";
varying_code += _mkid(E.key());
if (E.get().array_size > 0) {
varying_code += "[";
varying_code += itos(E.get().array_size);
varying_code += "]";
}
varying_code += ";\n";
String final_code = varying_code.as_string();
vertex_global += final_code;
fragment_global += final_code;
}
if (var_frag_to_light.size() > 0) {
String gcode = "\n\nstruct {\n";
for (List<Pair<StringName, SL::ShaderNode::Varying>>::Element *E = var_frag_to_light.front(); E; E = E->next()) {
gcode += "\t" + _prestr(E->get().second.precision) + _typestr(E->get().second.type) + " " + _mkid(E->get().first);
if (E->get().second.array_size > 0) {
gcode += "[";
gcode += itos(E->get().second.array_size);
gcode += "]";
}
gcode += ";\n";
}
gcode += "} frag_to_light;\n";
r_gen_code.fragment_global += gcode;
}
// constants
for (int i = 0; i < snode->vconstants.size(); i++) {
String gcode;
gcode += _constr(true);
if (snode->vconstants[i].type == SL::TYPE_STRUCT) {
gcode += _mkid(snode->vconstants[i].type_str);
} else {
gcode += _prestr(snode->vconstants[i].precision);
gcode += _typestr(snode->vconstants[i].type);
}
gcode += " " + _mkid(String(snode->vconstants[i].name));
gcode += "=";
gcode += _dump_node_code(snode->vconstants[i].initializer, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
gcode += ";\n";
vertex_global += gcode;
fragment_global += gcode;
}
// functions
RBMap<StringName, String> function_code;
for (int i = 0; i < snode->functions.size(); i++) {
SL::FunctionNode *fnode = snode->functions[i].function;
function = fnode;
current_func_name = fnode->name;
function_code[fnode->name] = _dump_node_code(fnode->body, 1, r_gen_code, p_actions, p_default_actions, p_assigning);
function = nullptr;
}
RBSet<StringName> added_vertex;
RBSet<StringName> added_fragment;
for (int i = 0; i < snode->functions.size(); i++) {
SL::FunctionNode *fnode = snode->functions[i].function;
function = fnode;
current_func_name = fnode->name;
if (fnode->name == vertex_name) {
_dump_function_deps(snode, fnode->name, function_code, vertex_global, added_vertex);
r_gen_code.vertex = function_code[vertex_name];
} else if (fnode->name == fragment_name) {
_dump_function_deps(snode, fnode->name, function_code, fragment_global, added_fragment);
r_gen_code.fragment = function_code[fragment_name];
} else if (fnode->name == light_name) {
_dump_function_deps(snode, fnode->name, function_code, fragment_global, added_fragment);
r_gen_code.light = function_code[light_name];
}
function = nullptr;
}
r_gen_code.vertex_global = vertex_global.as_string();
r_gen_code.fragment_global = fragment_global.as_string();
} 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;
if (!bnode->single_statement) {
code += _mktab(p_level - 1);
code += "{\n";
}
for (int i = 0; i < bnode->statements.size(); i++) {
String statement_code = _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 += statement_code;
} else {
code += _mktab(p_level);
code += statement_code;
code += ";\n";
}
}
if (!bnode->single_statement) {
code += _mktab(p_level - 1);
code += "}\n";
}
} break;
case SL::Node::TYPE_VARIABLE_DECLARATION: {
SL::VariableDeclarationNode *var_dec_node = (SL::VariableDeclarationNode *)p_node;
StringBuffer<> declaration;
declaration += _constr(var_dec_node->is_const);
if (var_dec_node->datatype == SL::TYPE_STRUCT) {
declaration += _mkid(var_dec_node->struct_name);
} else {
declaration += _prestr(var_dec_node->precision);
declaration += _typestr(var_dec_node->datatype);
}
for (int i = 0; i < var_dec_node->declarations.size(); i++) {
if (i > 0) {
declaration += ",";
}
declaration += " ";
declaration += _mkid(var_dec_node->declarations[i].name);
if (var_dec_node->declarations[i].initializer) {
declaration += " = ";
declaration += _dump_node_code(var_dec_node->declarations[i].initializer, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
}
}
code += declaration.as_string();
} break;
case SL::Node::TYPE_VARIABLE: {
SL::VariableNode *var_node = (SL::VariableNode *)p_node;
bool use_fragment_varying = false;
if (!var_node->is_local && current_func_name != vertex_name) {
if (p_assigning) {
if (shader->varyings.has(var_node->name)) {
use_fragment_varying = true;
}
} else {
if (fragment_varyings.has(var_node->name)) {
use_fragment_varying = true;
}
}
}
if (p_assigning && p_actions.write_flag_pointers.has(var_node->name)) {
*p_actions.write_flag_pointers[var_node->name] = true;
}
if (p_default_actions.usage_defines.has(var_node->name) && !used_name_defines.has(var_node->name)) {
String define = p_default_actions.usage_defines[var_node->name];
String node_name = define.substr(1, define.length());
if (define.begins_with("@")) {
define = p_default_actions.usage_defines[node_name];
}
if (!used_name_defines.has(node_name)) {
r_gen_code.custom_defines.push_back(define.utf8());
}
used_name_defines.insert(var_node->name);
}
if (p_actions.usage_flag_pointers.has(var_node->name) && !used_flag_pointers.has(var_node->name)) {
*p_actions.usage_flag_pointers[var_node->name] = true;
used_flag_pointers.insert(var_node->name);
}
if (p_default_actions.renames.has(var_node->name)) {
code += p_default_actions.renames[var_node->name];
} else if (use_fragment_varying) {
code += "frag_to_light." + _mkid(var_node->name);
} else {
code += _mkid(var_node->name);
}
if (var_node->name == time_name) {
if (current_func_name == vertex_name) {
r_gen_code.uses_vertex_time = true;
}
if (current_func_name == fragment_name || current_func_name == light_name) {
r_gen_code.uses_fragment_time = true;
}
}
} break;
case SL::Node::TYPE_ARRAY_CONSTRUCT: {
SL::ArrayConstructNode *arr_con_node = (SL::ArrayConstructNode *)p_node;
int sz = arr_con_node->initializer.size();
if (arr_con_node->datatype == SL::TYPE_STRUCT) {
code += _mkid(arr_con_node->struct_name);
} else {
code += _typestr(arr_con_node->datatype);
}
code += "[";
code += itos(arr_con_node->initializer.size());
code += "]";
code += "(";
for (int i = 0; i < sz; i++) {
code += _dump_node_code(arr_con_node->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_DECLARATION: {
SL::ArrayDeclarationNode *arr_dec_node = (SL::ArrayDeclarationNode *)p_node;
StringBuffer<> declaration;
if (arr_dec_node->datatype == SL::TYPE_STRUCT) {
declaration += _mkid(arr_dec_node->struct_name);
} else {
declaration += _prestr(arr_dec_node->precision);
declaration += _typestr(arr_dec_node->datatype);
}
for (int i = 0; i < arr_dec_node->declarations.size(); i++) {
if (i > 0) {
declaration += ",";
}
declaration += " ";
declaration += _mkid(arr_dec_node->declarations[i].name);
declaration += "[";
declaration += itos(arr_dec_node->declarations[i].size);
declaration += "]";
}
code += declaration.as_string();
} break;
case SL::Node::TYPE_ARRAY: {
SL::ArrayNode *arr_node = (SL::ArrayNode *)p_node;
bool use_fragment_varying = false;
if (!arr_node->is_local && current_func_name != vertex_name) {
if (arr_node->assign_expression != nullptr) {
use_fragment_varying = true;
} else {
if (p_assigning) {
if (shader->varyings.has(arr_node->name)) {
use_fragment_varying = true;
}
} else {
if (fragment_varyings.has(arr_node->name)) {
use_fragment_varying = true;
}
}
}
}
if (p_assigning && p_actions.write_flag_pointers.has(arr_node->name)) {
*p_actions.write_flag_pointers[arr_node->name] = true;
}
if (p_default_actions.usage_defines.has(arr_node->name) && !used_name_defines.has(arr_node->name)) {
String define = p_default_actions.usage_defines[arr_node->name];
String node_name = define.substr(1, define.length());
if (define.begins_with("@")) {
define = p_default_actions.usage_defines[node_name];
}
if (!used_name_defines.has(node_name)) {
r_gen_code.custom_defines.push_back(define.utf8());
}
used_name_defines.insert(arr_node->name);
}
if (p_actions.usage_flag_pointers.has(arr_node->name) && !used_flag_pointers.has(arr_node->name)) {
*p_actions.usage_flag_pointers[arr_node->name] = true;
used_flag_pointers.insert(arr_node->name);
}
if (p_default_actions.renames.has(arr_node->name)) {
code += p_default_actions.renames[arr_node->name];
} else if (use_fragment_varying) {
code += "frag_to_light." + _mkid(arr_node->name);
} else {
code += _mkid(arr_node->name);
}
if (arr_node->call_expression != nullptr) {
code += ".";
code += _dump_node_code(arr_node->call_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning, false);
}
if (arr_node->index_expression != nullptr) {
code += "[";
code += _dump_node_code(arr_node->index_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "]";
}
if (arr_node->name == time_name) {
if (current_func_name == vertex_name) {
r_gen_code.uses_vertex_time = true;
}
if (current_func_name == fragment_name || current_func_name == light_name) {
r_gen_code.uses_fragment_time = true;
}
}
} break;
case SL::Node::TYPE_CONSTANT: {
SL::ConstantNode *const_node = (SL::ConstantNode *)p_node;
return get_constant_text(const_node->datatype, const_node->values);
} break;
case SL::Node::TYPE_OPERATOR: {
SL::OperatorNode *op_node = (SL::OperatorNode *)p_node;
switch (op_node->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_BIT_AND:
case SL::OP_ASSIGN_BIT_OR:
case SL::OP_ASSIGN_BIT_XOR: {
code += _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, true);
code += " ";
code += _opstr(op_node->op);
code += " ";
code += _dump_node_code(op_node->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
} break;
case SL::OP_ASSIGN_MOD: {
String a = _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
String n = _dump_node_code(op_node->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += a + " = " + n + " == 0 ? 0 : ";
code += a + " - " + n + " * (" + a + " / " + n + ")";
} break;
case SL::OP_BIT_INVERT:
case SL::OP_NEGATE:
case SL::OP_NOT:
case SL::OP_DECREMENT:
case SL::OP_INCREMENT: {
code += _opstr(op_node->op);
code += _dump_node_code(op_node->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(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += _opstr(op_node->op);
} break;
case SL::OP_CALL:
case SL::OP_STRUCT:
case SL::OP_CONSTRUCT: {
ERR_FAIL_COND_V(op_node->arguments[0]->type != SL::Node::TYPE_VARIABLE, String());
SL::VariableNode *var_node = (SL::VariableNode *)op_node->arguments[0];
if (op_node->op == SL::OP_STRUCT) {
code += _mkid(var_node->name);
} else if (op_node->op == SL::OP_CONSTRUCT) {
code += var_node->name;
} else {
if (var_node->name == "texture") {
// emit texture call
if (op_node->arguments[1]->get_datatype() == SL::TYPE_SAMPLER2D ||
op_node->arguments[1]->get_datatype() == SL::TYPE_SAMPLEREXT) {
code += "texture2D";
} else if (op_node->arguments[1]->get_datatype() == SL::TYPE_SAMPLERCUBE) {
code += "textureCube";
}
} else if (var_node->name == "textureLod") {
// emit texture call
if (op_node->arguments[1]->get_datatype() == SL::TYPE_SAMPLER2D) {
code += "texture2DLod";
} else if (op_node->arguments[1]->get_datatype() == SL::TYPE_SAMPLERCUBE) {
code += "textureCubeLod";
}
} else if (var_node->name == "mix") {
switch (op_node->arguments[3]->get_datatype()) {
case SL::TYPE_BVEC2: {
code += "select2";
} break;
case SL::TYPE_BVEC3: {
code += "select3";
} break;
case SL::TYPE_BVEC4: {
code += "select4";
} break;
case SL::TYPE_VEC2:
case SL::TYPE_VEC3:
case SL::TYPE_VEC4:
case SL::TYPE_FLOAT: {
code += "mix";
} break;
default: {
SL::DataType type = op_node->arguments[3]->get_datatype();
// FIXME: Proper error print or graceful handling
print_line(String("uhhhh invalid mix with type: ") + itos(type));
} break;
}
} else if (p_default_actions.renames.has(var_node->name)) {
code += p_default_actions.renames[var_node->name];
} else if (internal_functions.has(var_node->name)) {
code += var_node->name;
} else {
code += _mkid(var_node->name);
}
}
code += "(";
for (int i = 1; i < op_node->arguments.size(); i++) {
if (i > 1) {
code += ", ";
}
code += _dump_node_code(op_node->arguments[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
}
code += ")";
if (p_default_actions.usage_defines.has(var_node->name) && !used_name_defines.has(var_node->name)) {
String define = p_default_actions.usage_defines[var_node->name];
String node_name = define.substr(1, define.length());
if (define.begins_with("@")) {
define = p_default_actions.usage_defines[node_name];
}
if (!used_name_defines.has(node_name)) {
r_gen_code.custom_defines.push_back(define.utf8());
}
used_name_defines.insert(var_node->name);
}
} break;
case SL::OP_INDEX: {
code += _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "[";
code += _dump_node_code(op_node->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(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += " ? ";
code += _dump_node_code(op_node->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += " : ";
code += _dump_node_code(op_node->arguments[2], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += ")";
} break;
case SL::OP_MOD: {
String a = _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
String n = _dump_node_code(op_node->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "(" + n + " == 0 ? 0 : ";
code += a + " - " + n + " * (" + a + " / " + n + "))";
} break;
default: {
if (p_use_scope) {
code += "(";
}
code += _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += " ";
code += _opstr(op_node->op);
code += " ";
code += _dump_node_code(op_node->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 *cf_node = (SL::ControlFlowNode *)p_node;
if (cf_node->flow_op == SL::FLOW_OP_IF) {
code += _mktab(p_level);
code += "if (";
code += _dump_node_code(cf_node->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += ")\n";
code += _dump_node_code(cf_node->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
if (cf_node->blocks.size() == 2) {
code += _mktab(p_level);
code += "else\n";
code += _dump_node_code(cf_node->blocks[1], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
}
} else if (cf_node->flow_op == SL::FLOW_OP_DO) {
code += _mktab(p_level);
code += "do";
code += _dump_node_code(cf_node->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
code += _mktab(p_level);
code += "while (";
code += _dump_node_code(cf_node->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += ");";
} else if (cf_node->flow_op == SL::FLOW_OP_WHILE) {
code += _mktab(p_level);
code += "while (";
code += _dump_node_code(cf_node->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += ")\n";
code += _dump_node_code(cf_node->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
} else if (cf_node->flow_op == SL::FLOW_OP_FOR) {
code += _mktab(p_level);
code += "for (";
code += _dump_node_code(cf_node->blocks[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "; ";
code += _dump_node_code(cf_node->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "; ";
code += _dump_node_code(cf_node->expressions[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += ")\n";
code += _dump_node_code(cf_node->blocks[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
} else if (cf_node->flow_op == SL::FLOW_OP_RETURN) {
code += _mktab(p_level);
code += "return";
if (cf_node->expressions.size()) {
code += " ";
code += _dump_node_code(cf_node->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
}
code += ";\n";
} else if (cf_node->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 (cf_node->flow_op == SL::FLOW_OP_CONTINUE) {
code += "continue;";
} else if (cf_node->flow_op == SL::FLOW_OP_BREAK) {
code += "break;";
}
} break;
case SL::Node::TYPE_MEMBER: {
SL::MemberNode *member_node = (SL::MemberNode *)p_node;
code += _dump_node_code(member_node->owner, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += ".";
code += member_node->name;
if (member_node->index_expression != nullptr) {
code += "[";
code += _dump_node_code(member_node->index_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "]";
}
} break;
}
return code.as_string();
}
Error ShaderCompilerGLES2::compile(RS::ShaderMode p_mode, const String &p_code, IdentifierActions *p_actions, const String &p_path, GeneratedCode &r_gen_code) {
Error err = parser.compile(p_code, ShaderTypes::get_singleton()->get_functions(p_mode), ShaderTypes::get_singleton()->get_modes(p_mode), ShaderTypes::get_singleton()->get_types());
if (err != OK) {
Vector<String> shader = p_code.split("\n");
for (int i = 0; i < shader.size(); i++) {
if (i + 1 == parser.get_error_line()) {
// 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, shader[i]));
} else {
print_line(vformat("%5d | %s", i + 1, shader[i]));
}
}
_err_print_error(nullptr, p_path.utf8().get_data(), parser.get_error_line(), parser.get_error_text().utf8().get_data(), ERR_HANDLER_SHADER);
return err;
}
r_gen_code.custom_defines.clear();
r_gen_code.uniforms.clear();
r_gen_code.texture_uniforms.clear();
r_gen_code.texture_hints.clear();
r_gen_code.vertex = String();
r_gen_code.vertex_global = String();
r_gen_code.fragment = String();
r_gen_code.fragment_global = String();
r_gen_code.light = String();
r_gen_code.uses_fragment_time = false;
r_gen_code.uses_vertex_time = 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[p_mode], false);
return OK;
}
ShaderCompilerGLES2::ShaderCompilerGLES2() {
/** CANVAS ITEM SHADER **/
actions[RS::SHADER_CANVAS_ITEM].renames["VERTEX"] = "outvec.xy";
actions[RS::SHADER_CANVAS_ITEM].renames["UV"] = "uv";
actions[RS::SHADER_CANVAS_ITEM].renames["POINT_SIZE"] = "point_size";
actions[RS::SHADER_CANVAS_ITEM].renames["WORLD_MATRIX"] = "modelview_matrix";
actions[RS::SHADER_CANVAS_ITEM].renames["PROJECTION_MATRIX"] = "projection_matrix";
actions[RS::SHADER_CANVAS_ITEM].renames["EXTRA_MATRIX"] = "extra_matrix_instance";
actions[RS::SHADER_CANVAS_ITEM].renames["TIME"] = "time";
actions[RS::SHADER_CANVAS_ITEM].renames["AT_LIGHT_PASS"] = "at_light_pass";
actions[RS::SHADER_CANVAS_ITEM].renames["INSTANCE_CUSTOM"] = "instance_custom";
actions[RS::SHADER_CANVAS_ITEM].renames["COLOR"] = "color";
actions[RS::SHADER_CANVAS_ITEM].renames["MODULATE"] = "final_modulate_alias";
actions[RS::SHADER_CANVAS_ITEM].renames["NORMAL"] = "normal";
actions[RS::SHADER_CANVAS_ITEM].renames["NORMALMAP"] = "normal_map";
actions[RS::SHADER_CANVAS_ITEM].renames["NORMALMAP_DEPTH"] = "normal_depth";
actions[RS::SHADER_CANVAS_ITEM].renames["TEXTURE"] = "color_texture";
actions[RS::SHADER_CANVAS_ITEM].renames["TEXTURE_PIXEL_SIZE"] = "color_texpixel_size";
actions[RS::SHADER_CANVAS_ITEM].renames["NORMAL_TEXTURE"] = "normal_texture";
actions[RS::SHADER_CANVAS_ITEM].renames["SCREEN_UV"] = "screen_uv";
actions[RS::SHADER_CANVAS_ITEM].renames["SCREEN_TEXTURE"] = "screen_texture";
actions[RS::SHADER_CANVAS_ITEM].renames["SCREEN_PIXEL_SIZE"] = "screen_pixel_size";
actions[RS::SHADER_CANVAS_ITEM].renames["FRAGCOORD"] = "gl_FragCoord";
actions[RS::SHADER_CANVAS_ITEM].renames["POINT_COORD"] = "gl_PointCoord";
actions[RS::SHADER_CANVAS_ITEM].renames["INSTANCE_ID"] = "0";
actions[RS::SHADER_CANVAS_ITEM].renames["VERTEX_ID"] = "0";
actions[RS::SHADER_CANVAS_ITEM].renames["LIGHT_VEC"] = "light_vec";
actions[RS::SHADER_CANVAS_ITEM].renames["LIGHT_HEIGHT"] = "light_height";
actions[RS::SHADER_CANVAS_ITEM].renames["LIGHT_COLOR"] = "light_color";
actions[RS::SHADER_CANVAS_ITEM].renames["LIGHT_UV"] = "light_uv";
actions[RS::SHADER_CANVAS_ITEM].renames["LIGHT"] = "light";
actions[RS::SHADER_CANVAS_ITEM].renames["SHADOW_COLOR"] = "shadow_color";
actions[RS::SHADER_CANVAS_ITEM].renames["SHADOW_VEC"] = "shadow_vec";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["COLOR"] = "#define COLOR_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["MODULATE"] = "#define MODULATE_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["SCREEN_TEXTURE"] = "#define SCREEN_TEXTURE_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["SCREEN_UV"] = "#define SCREEN_UV_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["SCREEN_PIXEL_SIZE"] = "@SCREEN_UV";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["NORMAL"] = "#define NORMAL_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["NORMALMAP"] = "#define NORMALMAP_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["LIGHT"] = "#define USE_LIGHT_SHADER_CODE\n";
actions[RS::SHADER_CANVAS_ITEM].render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
// Ported from GLES3
actions[RS::SHADER_CANVAS_ITEM].usage_defines["sinh"] = "#define SINH_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["cosh"] = "#define COSH_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["tanh"] = "#define TANH_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["asinh"] = "#define ASINH_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["acosh"] = "#define ACOSH_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["atanh"] = "#define ATANH_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["determinant"] = "#define DETERMINANT_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["transpose"] = "#define TRANSPOSE_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["outerProduct"] = "#define OUTER_PRODUCT_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["round"] = "#define ROUND_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["roundEven"] = "#define ROUND_EVEN_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["inverse"] = "#define INVERSE_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["isinf"] = "#define IS_INF_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["isnan"] = "#define IS_NAN_USED\n";
actions[RS::SHADER_CANVAS_ITEM].usage_defines["trunc"] = "#define TRUNC_USED\n";
// No defines for particle shaders in GLES2, there are no GPU particles
vertex_name = "vertex";
fragment_name = "fragment";
light_name = "light";
time_name = "TIME";
List<String> func_list;
ShaderLanguage::get_builtin_funcs(&func_list);
for (List<String>::Element *E = func_list.front(); E; E = E->next()) {
internal_functions.insert(E->get());
}
}
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