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Implemented do/while loops for shaders (#31349)

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Implemented do/while loops for shaders
This commit is contained in:
Yuri Roubinsky 2019-08-13 18:53:44 +03:00 committed by GitHub
commit 8f45d48156
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 62 additions and 14 deletions
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8
drivers/gles2/shader_compiler_gles2.cpp
View file

@ -802,6 +802,14 @@ String ShaderCompilerGLES2::_dump_node_code(SL::Node *p_node, int p_level, Gener
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 (";

5
drivers/gles3/shader_compiler_gles3.cpp
View file

@ -799,6 +799,11 @@ String ShaderCompilerGLES3::_dump_node_code(SL::Node *p_node, int p_level, Gener
code += _mktab(p_level) + "else\n";
code += _dump_node_code(cfnode->blocks[1], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
}
} else if (cfnode->flow_op == SL::FLOW_OP_DO) {
code += _mktab(p_level) + "do";
code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
code += _mktab(p_level) + "while (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ");";
} else if (cfnode->flow_op == SL::FLOW_OP_WHILE) {
code += _mktab(p_level) + "while (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ")\n";

63
servers/visual/shader_language.cpp
View file

@ -3862,14 +3862,13 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const Map<StringName, Bui
return ERR_PARSE_ERROR;
}
decl.size = ((uint32_t)tk.constant);
tk = _get_token();
if (tk.type != TK_BRACKET_CLOSE) {
_set_error("Expected ']'");
return ERR_PARSE_ERROR;
}
decl.size = ((uint32_t)tk.constant);
var.array_size = decl.size;
}
@ -4133,16 +4132,40 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const Map<StringName, Bui
} else {
_set_tkpos(pos); //rollback
}
} else if (tk.type == TK_CF_WHILE) {
//if () {}
} else if (tk.type == TK_CF_DO || tk.type == TK_CF_WHILE) {
// do {} while()
// while() {}
bool is_do = tk.type == TK_CF_DO;
BlockNode *do_block = NULL;
if (is_do) {
do_block = alloc_node<BlockNode>();
do_block->parent_block = p_block;
Error err = _parse_block(do_block, p_builtin_types, true, true, true);
if (err)
return err;
tk = _get_token();
if (tk.type != TK_CF_WHILE) {
_set_error("Expected while after do");
return ERR_PARSE_ERROR;
}
}
tk = _get_token();
if (tk.type != TK_PARENTHESIS_OPEN) {
_set_error("Expected '(' after while");
return ERR_PARSE_ERROR;
}
ControlFlowNode *cf = alloc_node<ControlFlowNode>();
cf->flow_op = FLOW_OP_WHILE;
if (is_do) {
cf->flow_op = FLOW_OP_DO;
} else {
cf->flow_op = FLOW_OP_WHILE;
}
Node *n = _parse_and_reduce_expression(p_block, p_builtin_types);
if (!n)
return ERR_PARSE_ERROR;
@ -4152,18 +4175,30 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const Map<StringName, Bui
_set_error("Expected ')' after expression");
return ERR_PARSE_ERROR;
}
if (!is_do) {
BlockNode *block = alloc_node<BlockNode>();
block->parent_block = p_block;
cf->expressions.push_back(n);
cf->blocks.push_back(block);
p_block->statements.push_back(cf);
BlockNode *block = alloc_node<BlockNode>();
block->parent_block = p_block;
cf->expressions.push_back(n);
cf->blocks.push_back(block);
p_block->statements.push_back(cf);
Error err = _parse_block(block, p_builtin_types, true, true, true);
if (err)
return err;
} else {
Error err = _parse_block(block, p_builtin_types, true, true, true);
if (err)
return err;
cf->expressions.push_back(n);
cf->blocks.push_back(do_block);
p_block->statements.push_back(cf);
tk = _get_token();
if (tk.type != TK_SEMICOLON) {
_set_error("Expected ';'");
return ERR_PARSE_ERROR;
}
}
} else if (tk.type == TK_CF_FOR) {
//if () {}
// for() {}
tk = _get_token();
if (tk.type != TK_PARENTHESIS_OPEN) {
_set_error("Expected '(' after for");