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godot/drivers/gles2/shader_compiler_gles2.cpp
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020 
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

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/*************************************************************************/
/* shader_compiler_gles2.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "shader_compiler_gles2.h"
#include "core/os/os.h"
#include "core/project_settings.h"
#include "core/string_buffer.h"
#include "core/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 _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;
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(SL::ShaderNode *p_node, const StringName &p_for_func, const Map<StringName, String> &p_func_code, StringBuilder &r_to_add, Set<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 (Set<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 = NULL;
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;
header += _typestr(fnode->return_type);
header += " ";
header += _mkid(fnode->name);
header += "(";
for (int i = 0; i < fnode->arguments.size(); i++) {
if (i > 0)
header += ", ";
header += _qualstr(fnode->arguments[i].qualifier);
header += _prestr(fnode->arguments[i].precision);
header += _typestr(fnode->arguments[i].type);
header += " ";
header += _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(SL::Node *p_node, int p_level, GeneratedCode &r_gen_code, IdentifierActions &p_actions, const DefaultIdentifierActions &p_default_actions, bool p_assigning) {
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 (Map<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;
// uniforms
for (Map<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
for (Map<StringName, SL::ShaderNode::Varying>::Element *E = snode->varyings.front(); E; E = E->next()) {
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;
}
// constants
for (Map<StringName, SL::ShaderNode::Constant>::Element *E = snode->constants.front(); E; E = E->next()) {
String gcode;
gcode += "const ";
gcode += _prestr(E->get().precision);
gcode += _typestr(E->get().type);
gcode += " " + _mkid(E->key());
gcode += "=";
gcode += _dump_node_code(E->get().initializer, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
gcode += ";\n";
vertex_global += gcode;
fragment_global += gcode;
}
// functions
Map<StringName, String> function_code;
for (int i = 0; i < snode->functions.size(); i++) {
SL::FunctionNode *fnode = snode->functions[i].function;
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);
}
Set<StringName> added_vertex;
Set<StringName> added_fragment;
for (int i = 0; i < snode->functions.size(); i++) {
SL::FunctionNode *fnode = snode->functions[i].function;
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];
}
}
r_gen_code.vertex_global = vertex_global.as_string();
r_gen_code.fragment_global = fragment_global.as_string();
} 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;
if (var_dec_node->is_const) {
declaration += "const ";
}
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;
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];
if (define.begins_with("@")) {
define = p_default_actions.usage_defines[define.substr(1, define.length())];
}
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 {
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_DECLARATION: {
SL::ArrayDeclarationNode *arr_dec_node = (SL::ArrayDeclarationNode *)p_node;
StringBuffer<> declaration;
if (arr_dec_node->is_const) {
declaration += "const ";
}
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 += "]";
int sz = arr_dec_node->declarations[i].initializer.size();
if (sz > 0) {
declaration += "=";
declaration += _typestr(arr_dec_node->datatype);
declaration += "[";
declaration += itos(sz);
declaration += "]";
declaration += "(";
for (int j = 0; j < sz; j++) {
declaration += _dump_node_code(arr_dec_node->declarations[i].initializer[j], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
if (j != sz - 1) {
declaration += ", ";
}
}
declaration += ")";
}
}
code += declaration.as_string();
} break;
case SL::Node::TYPE_ARRAY: {
SL::ArrayNode *arr_node = (SL::ArrayNode *)p_node;
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];
if (define.begins_with("@")) {
define = p_default_actions.usage_defines[define.substr(1, define.length())];
}
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 {
code += _mkid(arr_node->name);
}
if (arr_node->call_expression != NULL) {
code += ".";
code += _dump_node_code(arr_node->call_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
}
if (arr_node->index_expression != NULL) {
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: {
code += _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, true);
code += " = ";
code += "mod(";
code += _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, true);
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_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_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_CONSTRUCT) {
code += var_node->name;
} else {
if (var_node->name == "texture") {
// emit texture call
if (op_node->arguments[1]->get_datatype() == SL::TYPE_SAMPLER2D) {
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];
if (define.begins_with("@")) {
define = p_default_actions.usage_defines[define.substr(1, define.length())];
}
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: {
code += "mod(float(";
code += _dump_node_code(op_node->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "), float(";
code += _dump_node_code(op_node->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
code += "))";
} break;
default: {
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);
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;
} break;
}
return code.as_string();
}
Error ShaderCompilerGLES2::compile(VS::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++) {
print_line(itos(i + 1) + " " + shader[i]);
}
_err_print_error(NULL, 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();
_dump_node_code(parser.get_shader(), 1, r_gen_code, *p_actions, actions[p_mode], false);
return OK;
}
ShaderCompilerGLES2::ShaderCompilerGLES2() {
/** CANVAS ITEM SHADER **/
actions[VS::SHADER_CANVAS_ITEM].renames["VERTEX"] = "outvec.xy";
actions[VS::SHADER_CANVAS_ITEM].renames["UV"] = "uv";
actions[VS::SHADER_CANVAS_ITEM].renames["POINT_SIZE"] = "point_size";
actions[VS::SHADER_CANVAS_ITEM].renames["WORLD_MATRIX"] = "modelview_matrix";
actions[VS::SHADER_CANVAS_ITEM].renames["PROJECTION_MATRIX"] = "projection_matrix";
actions[VS::SHADER_CANVAS_ITEM].renames["EXTRA_MATRIX"] = "extra_matrix_instance";
actions[VS::SHADER_CANVAS_ITEM].renames["TIME"] = "time";
actions[VS::SHADER_CANVAS_ITEM].renames["AT_LIGHT_PASS"] = "at_light_pass";
actions[VS::SHADER_CANVAS_ITEM].renames["INSTANCE_CUSTOM"] = "instance_custom";
actions[VS::SHADER_CANVAS_ITEM].renames["COLOR"] = "color";
actions[VS::SHADER_CANVAS_ITEM].renames["NORMAL"] = "normal";
actions[VS::SHADER_CANVAS_ITEM].renames["NORMALMAP"] = "normal_map";
actions[VS::SHADER_CANVAS_ITEM].renames["NORMALMAP_DEPTH"] = "normal_depth";
actions[VS::SHADER_CANVAS_ITEM].renames["TEXTURE"] = "color_texture";
actions[VS::SHADER_CANVAS_ITEM].renames["TEXTURE_PIXEL_SIZE"] = "color_texpixel_size";
actions[VS::SHADER_CANVAS_ITEM].renames["NORMAL_TEXTURE"] = "normal_texture";
actions[VS::SHADER_CANVAS_ITEM].renames["SCREEN_UV"] = "screen_uv";
actions[VS::SHADER_CANVAS_ITEM].renames["SCREEN_TEXTURE"] = "screen_texture";
actions[VS::SHADER_CANVAS_ITEM].renames["SCREEN_PIXEL_SIZE"] = "screen_pixel_size";
actions[VS::SHADER_CANVAS_ITEM].renames["FRAGCOORD"] = "gl_FragCoord";
actions[VS::SHADER_CANVAS_ITEM].renames["POINT_COORD"] = "gl_PointCoord";
actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT_VEC"] = "light_vec";
actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT_HEIGHT"] = "light_height";
actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT_COLOR"] = "light_color";
actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT_UV"] = "light_uv";
actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT"] = "light";
actions[VS::SHADER_CANVAS_ITEM].renames["SHADOW_COLOR"] = "shadow_color";
actions[VS::SHADER_CANVAS_ITEM].renames["SHADOW_VEC"] = "shadow_vec";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["COLOR"] = "#define COLOR_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["SCREEN_TEXTURE"] = "#define SCREEN_TEXTURE_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["SCREEN_UV"] = "#define SCREEN_UV_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["SCREEN_PIXEL_SIZE"] = "@SCREEN_UV";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["NORMAL"] = "#define NORMAL_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["NORMALMAP"] = "#define NORMALMAP_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["LIGHT"] = "#define USE_LIGHT_SHADER_CODE\n";
actions[VS::SHADER_CANVAS_ITEM].render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["SHADOW_VEC"] = "#define SHADOW_VEC_USED\n";
// Ported from GLES3
actions[VS::SHADER_CANVAS_ITEM].usage_defines["sinh"] = "#define SINH_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["cosh"] = "#define COSH_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["tanh"] = "#define TANH_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["asinh"] = "#define ASINH_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["acosh"] = "#define ACOSH_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["atanh"] = "#define ATANH_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["determinant"] = "#define DETERMINANT_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["transpose"] = "#define TRANSPOSE_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["outerProduct"] = "#define OUTER_PRODUCT_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["round"] = "#define ROUND_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["roundEven"] = "#define ROUND_EVEN_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["inverse"] = "#define INVERSE_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["isinf"] = "#define IS_INF_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["isnan"] = "#define IS_NAN_USED\n";
actions[VS::SHADER_CANVAS_ITEM].usage_defines["trunc"] = "#define TRUNC_USED\n";
/** SPATIAL SHADER **/
actions[VS::SHADER_SPATIAL].renames["WORLD_MATRIX"] = "world_transform";
actions[VS::SHADER_SPATIAL].renames["INV_CAMERA_MATRIX"] = "camera_inverse_matrix";
actions[VS::SHADER_SPATIAL].renames["CAMERA_MATRIX"] = "camera_matrix";
actions[VS::SHADER_SPATIAL].renames["PROJECTION_MATRIX"] = "projection_matrix";
actions[VS::SHADER_SPATIAL].renames["INV_PROJECTION_MATRIX"] = "projection_inverse_matrix";
actions[VS::SHADER_SPATIAL].renames["MODELVIEW_MATRIX"] = "modelview";
actions[VS::SHADER_SPATIAL].renames["VERTEX"] = "vertex.xyz";
actions[VS::SHADER_SPATIAL].renames["NORMAL"] = "normal";
actions[VS::SHADER_SPATIAL].renames["TANGENT"] = "tangent";
actions[VS::SHADER_SPATIAL].renames["BINORMAL"] = "binormal";
actions[VS::SHADER_SPATIAL].renames["POSITION"] = "position";
actions[VS::SHADER_SPATIAL].renames["UV"] = "uv_interp";
actions[VS::SHADER_SPATIAL].renames["UV2"] = "uv2_interp";
actions[VS::SHADER_SPATIAL].renames["COLOR"] = "color_interp";
actions[VS::SHADER_SPATIAL].renames["POINT_SIZE"] = "point_size";
// gl_InstanceID is not available in OpenGL ES 2.0
actions[VS::SHADER_SPATIAL].renames["INSTANCE_ID"] = "0";
//builtins
actions[VS::SHADER_SPATIAL].renames["TIME"] = "time";
actions[VS::SHADER_SPATIAL].renames["VIEWPORT_SIZE"] = "viewport_size";
actions[VS::SHADER_SPATIAL].renames["FRAGCOORD"] = "gl_FragCoord";
actions[VS::SHADER_SPATIAL].renames["FRONT_FACING"] = "gl_FrontFacing";
actions[VS::SHADER_SPATIAL].renames["NORMALMAP"] = "normalmap";
actions[VS::SHADER_SPATIAL].renames["NORMALMAP_DEPTH"] = "normaldepth";
actions[VS::SHADER_SPATIAL].renames["ALBEDO"] = "albedo";
actions[VS::SHADER_SPATIAL].renames["ALPHA"] = "alpha";
actions[VS::SHADER_SPATIAL].renames["METALLIC"] = "metallic";
actions[VS::SHADER_SPATIAL].renames["SPECULAR"] = "specular";
actions[VS::SHADER_SPATIAL].renames["ROUGHNESS"] = "roughness";
actions[VS::SHADER_SPATIAL].renames["RIM"] = "rim";
actions[VS::SHADER_SPATIAL].renames["RIM_TINT"] = "rim_tint";
actions[VS::SHADER_SPATIAL].renames["CLEARCOAT"] = "clearcoat";
actions[VS::SHADER_SPATIAL].renames["CLEARCOAT_GLOSS"] = "clearcoat_gloss";
actions[VS::SHADER_SPATIAL].renames["ANISOTROPY"] = "anisotropy";
actions[VS::SHADER_SPATIAL].renames["ANISOTROPY_FLOW"] = "anisotropy_flow";
actions[VS::SHADER_SPATIAL].renames["SSS_STRENGTH"] = "sss_strength";
actions[VS::SHADER_SPATIAL].renames["TRANSMISSION"] = "transmission";
actions[VS::SHADER_SPATIAL].renames["AO"] = "ao";
actions[VS::SHADER_SPATIAL].renames["AO_LIGHT_AFFECT"] = "ao_light_affect";
actions[VS::SHADER_SPATIAL].renames["EMISSION"] = "emission";
actions[VS::SHADER_SPATIAL].renames["POINT_COORD"] = "gl_PointCoord";
actions[VS::SHADER_SPATIAL].renames["INSTANCE_CUSTOM"] = "instance_custom";
actions[VS::SHADER_SPATIAL].renames["SCREEN_UV"] = "screen_uv";
actions[VS::SHADER_SPATIAL].renames["SCREEN_TEXTURE"] = "screen_texture";
actions[VS::SHADER_SPATIAL].renames["DEPTH_TEXTURE"] = "depth_texture";
// Defined in GLES3, but not available in GLES2
//actions[VS::SHADER_SPATIAL].renames["DEPTH"] = "gl_FragDepth";
actions[VS::SHADER_SPATIAL].renames["ALPHA_SCISSOR"] = "alpha_scissor";
actions[VS::SHADER_SPATIAL].renames["OUTPUT_IS_SRGB"] = "SHADER_IS_SRGB";
//for light
actions[VS::SHADER_SPATIAL].renames["VIEW"] = "view";
actions[VS::SHADER_SPATIAL].renames["LIGHT_COLOR"] = "light_color";
actions[VS::SHADER_SPATIAL].renames["LIGHT"] = "light";
actions[VS::SHADER_SPATIAL].renames["ATTENUATION"] = "attenuation";
actions[VS::SHADER_SPATIAL].renames["DIFFUSE_LIGHT"] = "diffuse_light";
actions[VS::SHADER_SPATIAL].renames["SPECULAR_LIGHT"] = "specular_light";
actions[VS::SHADER_SPATIAL].usage_defines["TANGENT"] = "#define ENABLE_TANGENT_INTERP\n";
actions[VS::SHADER_SPATIAL].usage_defines["BINORMAL"] = "@TANGENT";
actions[VS::SHADER_SPATIAL].usage_defines["RIM"] = "#define LIGHT_USE_RIM\n";
actions[VS::SHADER_SPATIAL].usage_defines["RIM_TINT"] = "@RIM";
actions[VS::SHADER_SPATIAL].usage_defines["CLEARCOAT"] = "#define LIGHT_USE_CLEARCOAT\n";
actions[VS::SHADER_SPATIAL].usage_defines["CLEARCOAT_GLOSS"] = "@CLEARCOAT";
actions[VS::SHADER_SPATIAL].usage_defines["ANISOTROPY"] = "#define LIGHT_USE_ANISOTROPY\n";
actions[VS::SHADER_SPATIAL].usage_defines["ANISOTROPY_FLOW"] = "@ANISOTROPY";
actions[VS::SHADER_SPATIAL].usage_defines["AO"] = "#define ENABLE_AO\n";
actions[VS::SHADER_SPATIAL].usage_defines["AO_LIGHT_AFFECT"] = "#define ENABLE_AO\n";
actions[VS::SHADER_SPATIAL].usage_defines["UV"] = "#define ENABLE_UV_INTERP\n";
actions[VS::SHADER_SPATIAL].usage_defines["UV2"] = "#define ENABLE_UV2_INTERP\n";
actions[VS::SHADER_SPATIAL].usage_defines["NORMALMAP"] = "#define ENABLE_NORMALMAP\n";
actions[VS::SHADER_SPATIAL].usage_defines["NORMALMAP_DEPTH"] = "@NORMALMAP";
actions[VS::SHADER_SPATIAL].usage_defines["COLOR"] = "#define ENABLE_COLOR_INTERP\n";
actions[VS::SHADER_SPATIAL].usage_defines["INSTANCE_CUSTOM"] = "#define ENABLE_INSTANCE_CUSTOM\n";
actions[VS::SHADER_SPATIAL].usage_defines["ALPHA_SCISSOR"] = "#define ALPHA_SCISSOR_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["POSITION"] = "#define OVERRIDE_POSITION\n";
actions[VS::SHADER_SPATIAL].usage_defines["SSS_STRENGTH"] = "#define ENABLE_SSS\n";
actions[VS::SHADER_SPATIAL].usage_defines["TRANSMISSION"] = "#define TRANSMISSION_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["SCREEN_TEXTURE"] = "#define SCREEN_TEXTURE_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["DEPTH_TEXTURE"] = "#define DEPTH_TEXTURE_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["SCREEN_UV"] = "#define SCREEN_UV_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["DIFFUSE_LIGHT"] = "#define USE_LIGHT_SHADER_CODE\n";
actions[VS::SHADER_SPATIAL].usage_defines["SPECULAR_LIGHT"] = "#define USE_LIGHT_SHADER_CODE\n";
// Ported from GLES3
actions[VS::SHADER_SPATIAL].usage_defines["sinh"] = "#define SINH_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["cosh"] = "#define COSH_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["tanh"] = "#define TANH_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["asinh"] = "#define ASINH_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["acosh"] = "#define ACOSH_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["atanh"] = "#define ATANH_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["determinant"] = "#define DETERMINANT_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["transpose"] = "#define TRANSPOSE_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["outerProduct"] = "#define OUTER_PRODUCT_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["round"] = "#define ROUND_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["roundEven"] = "#define ROUND_EVEN_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["inverse"] = "#define INVERSE_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["isinf"] = "#define IS_INF_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["isnan"] = "#define IS_NAN_USED\n";
actions[VS::SHADER_SPATIAL].usage_defines["trunc"] = "#define TRUNC_USED\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["world_vertex_coords"] = "#define VERTEX_WORLD_COORDS_USED\n";
// Defined in GLES3, could be implemented in GLES2 too if there's a need for it
//actions[VS::SHADER_SPATIAL].render_mode_defines["ensure_correct_normals"] = "#define ENSURE_CORRECT_NORMALS\n";
// Defined in GLES3, might not be possible in GLES2 as gl_FrontFacing is not available
//actions[VS::SHADER_SPATIAL].render_mode_defines["cull_front"] = "#define DO_SIDE_CHECK\n";
//actions[VS::SHADER_SPATIAL].render_mode_defines["cull_disabled"] = "#define DO_SIDE_CHECK\n";
bool force_lambert = GLOBAL_GET("rendering/quality/shading/force_lambert_over_burley");
if (!force_lambert) {
actions[VS::SHADER_SPATIAL].render_mode_defines["diffuse_burley"] = "#define DIFFUSE_BURLEY\n";
}
actions[VS::SHADER_SPATIAL].render_mode_defines["diffuse_oren_nayar"] = "#define DIFFUSE_OREN_NAYAR\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["diffuse_lambert_wrap"] = "#define DIFFUSE_LAMBERT_WRAP\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["diffuse_toon"] = "#define DIFFUSE_TOON\n";
bool force_blinn = GLOBAL_GET("rendering/quality/shading/force_blinn_over_ggx");
if (!force_blinn) {
actions[VS::SHADER_SPATIAL].render_mode_defines["specular_schlick_ggx"] = "#define SPECULAR_SCHLICK_GGX\n";
} else {
actions[VS::SHADER_SPATIAL].render_mode_defines["specular_schlick_ggx"] = "#define SPECULAR_BLINN\n";
}
actions[VS::SHADER_SPATIAL].render_mode_defines["specular_blinn"] = "#define SPECULAR_BLINN\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["specular_phong"] = "#define SPECULAR_PHONG\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["specular_toon"] = "#define SPECULAR_TOON\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["specular_disabled"] = "#define SPECULAR_DISABLED\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["shadows_disabled"] = "#define SHADOWS_DISABLED\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["ambient_light_disabled"] = "#define AMBIENT_LIGHT_DISABLED\n";
actions[VS::SHADER_SPATIAL].render_mode_defines["shadow_to_opacity"] = "#define USE_SHADOW_TO_OPACITY\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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